@dxfeed/dxlink-websocket-client - npm Package Compare versions

Comparing version 0.3.0 to 0.4.0

build/channel.d.ts

 import { type DXLinkChannel, DXLinkChannelState, type DXLinkChannelMessageListener, type DXLinkChannelStateChangeListener, type DXLinkErrorListener, type DXLinkChannelMessage, type DXLinkError } from '@dxfeed/dxlink-core';
 import { type DXLinkWebSocketClientConfig } from './config';
-import { type ChannelPayloadMessage, type Message } from './messages';
+import { type ChannelPayloadMessage, type DXLinkWebSocketMessage } from './messages';
 /**
@@ -18,3 +18,3 @@ * A DXLink channel implementation.
     private logger;
-    constructor(id: number, service: string, parameters: Record<string, unknown>, sendMessage: (message: Message) => void, config: DXLinkWebSocketClientConfig);
+    constructor(id: number, service: string, parameters: Record<string, unknown>, sendMessage: (message: DXLinkWebSocketMessage) => void, config: DXLinkWebSocketClientConfig);
     send: ({ type, ...payload }: DXLinkChannelMessage) => void;
@@ -21,0 +21,0 @@ addMessageListener: (listener: DXLinkChannelMessageListener) => Set<DXLinkChannelMessageListener>;

build/config.d.ts

 import type { DXLinkLogLevel } from '@dxfeed/dxlink-core';
+import type { DXLinkWebSocketConnector } from './connector';
 /**
@@ -34,2 +35,10 @@ * Options for {@link DXLinkWebSocketClient}.
     readonly maxReconnectAttempts: number;
+    /**
+     * Factory function to create a WebSocket connector.
+     * This function should return an instance of {@link DXLinkWebSocketConnector} for the given URL.
+     * This allows for custom WebSocket implementations or configurations.
+     * @param url The URL to connect to.
+     * @returns {@link DXLinkWebSocketConnector} instance
+     */
+    readonly connectorFactory: (url: string) => DXLinkWebSocketConnector;
 }

build/connector.d.ts

@@ -1,9 +0,53 @@
-import { type Message } from './messages';
-type CloseListener = (reason: string, error: boolean) => void;
+import { type DXLinkWebSocketMessage } from './messages';
 /**
- * Connector for the WebSocket connection.
+ * Interface for a WebSocket connector that manages the connection to a WebSocket server.
+ * It provides methods to start and stop the connection, send messages, and set listeners for open, close, and message events.
+ */
+export interface DXLinkWebSocketConnector {
+    /**
+     * Returns the URL of the WebSocket connection.
+     */
+    getUrl(): string;
+    /**
+     * Starts the WebSocket connection.
+     */
+    start(): void;
+    /**
+     * Stops the WebSocket connection and cleans up resources.
+     */
+    stop(): void;
+    /**
+     * Sends a message over the WebSocket connection.
+     * @param message The message to send.
+     */
+    sendMessage(message: DXLinkWebSocketMessage): void;
+    /**
+     * Sets a listener that is called when the WebSocket connection is opened.
+     * @param listener The listener function to call when the connection is opened.
+     */
+    setOpenListener(listener: () => void): void;
+    /**
+     * Sets a listener that is called when the WebSocket connection is closed.
+     * @param listener The listener function to call when the connection is closed.
+     */
+    setCloseListener(listener: DXLinkWebSocketCloseListener): void;
+    /**
+     * Sets a listener that is called when a message is received from the WebSocket server.
+     * @param listener The listener function to call when a message is received.
+     */
+    setMessageListener(listener: (message: DXLinkWebSocketMessage) => void): void;
+}
+/**
+ * Type for a close listener that is called when the WebSocket connection is closed.
+ * @param reason - The reason for the closure.
+ * @param error - Indicates if the closure was due to an error.
+ */
+export type DXLinkWebSocketCloseListener = (reason: string, error: boolean) => void;
+/**
+ * Default connector for the WebSocket connection.
  * @internal
  */
-export declare class WebSocketConnector {
+export declare class DefaultDXLinkWebSocketConnector implements DXLinkWebSocketConnector {
     private readonly url;
+    private readonly protocols?;
     private socket;
@@ -14,9 +58,9 @@ private isAvailable;
     private messageListener;
-    constructor(url: string);
+    constructor(url: string, protocols?: string | string[] | undefined);
     start(): void;
     stop(): void;
-    sendMessage: (message: Message) => void;
+    sendMessage: (message: DXLinkWebSocketMessage) => void;
     setOpenListener: (listener: () => void) => void;
-    setCloseListener: (listener: CloseListener) => void;
-    setMessageListener: (listener: (message: Message) => void) => void;
+    setCloseListener: (listener: DXLinkWebSocketCloseListener) => void;
+    setMessageListener: (listener: (message: DXLinkWebSocketMessage) => void) => void;
     getUrl: () => string;
@@ -28,2 +72,1 @@ private handleOpen;
 }
-export {};

build/index.d.ts

 export { DXLinkWebSocketClient, DXLINK_WS_PROTOCOL_VERSION } from './client';
 export { type DXLinkWebSocketClientConfig } from './config';
+export { type DXLinkWebSocketConnector, type DXLinkWebSocketCloseListener, DefaultDXLinkWebSocketConnector, } from './connector';
+export { type DXLinkWebSocketMessage } from './messages';

build/index.js

@@ -1,2 +0,2 @@
-var dxlinkCore=require("@dxfeed/dxlink-core");class DXLinkWebSocketChannel{constructor(id,service,parameters,sendMessage,config){this.id=void 0,this.service=void 0,this.parameters=void 0,this.sendMessage=void 0,this.status=dxlinkCore.DXLinkChannelState.REQUESTED,this.messageListeners=new Set,this.statusListeners=new Set,this.errorListeners=new Set,this.logger=void 0,this.send=({type:type,...payload})=>{if(this.status!==dxlinkCore.DXLinkChannelState.OPENED)throw new Error("Channel is not ready");this.sendMessage({type:type,channel:this.id,...payload})},this.addMessageListener=listener=>this.messageListeners.add(listener),this.removeMessageListener=listener=>this.messageListeners.delete(listener),this.getState=()=>this.status,this.addStateChangeListener=listener=>this.statusListeners.add(listener),this.removeStateChangeListener=listener=>this.statusListeners.delete(listener),this.addErrorListener=listener=>this.errorListeners.add(listener),this.removeErrorListener=listener=>this.errorListeners.delete(listener),this.error=({type:type,message:message})=>this.send({type:"ERROR",error:type,message:message}),this.close=()=>{this.status!==dxlinkCore.DXLinkChannelState.CLOSED&&(this.logger.debug("Closing by user"),this.setStatus(dxlinkCore.DXLinkChannelState.CLOSED),this.clear(),this.sendMessage({type:"CHANNEL_CANCEL",channel:this.id}))},this.request=()=>{this.logger.debug("Requesting"),this.sendMessage({type:"CHANNEL_REQUEST",channel:this.id,service:this.service,parameters:this.parameters}),this.processStatusRequested()},this.processPayloadMessage=message=>{for(const listener of this.messageListeners)listener(message)},this.processStatusOpened=()=>{this.logger.debug("Opened"),this.setStatus(dxlinkCore.DXLinkChannelState.OPENED)},this.processStatusRequested=()=>{this.setStatus(dxlinkCore.DXLinkChannelState.REQUESTED)},this.processStatusClosed=()=>{this.logger.debug("Closed by remote endpoint"),this.setStatus(dxlinkCore.DXLinkChannelState.CLOSED),this.clear()},this.processError=error=>{if(0!==this.errorListeners.size)for(const listener of this.errorListeners)try{listener(error)}catch(e){this.logger.error(`Error in channel#${this.id} error listener: `,e)}else this.logger.error(`Unhandled error in channel#${this.id}: `,error)},this.setStatus=newStatus=>{if(this.status===newStatus)return;const prev=this.status;this.status=newStatus;for(const listener of this.statusListeners)try{listener(newStatus,prev)}catch(e){this.logger.error(`Error in channel#${this.id} status listener: `,e)}},this.clear=()=>{this.messageListeners.clear(),this.statusListeners.clear()},this.id=id,this.service=service,this.parameters=parameters,this.sendMessage=sendMessage,this.logger=new dxlinkCore.Logger(`${DXLinkWebSocketChannel.name}#${id} ${service}`,config.logLevel)}}class WebSocketConnector{constructor(url){this.url=void 0,this.socket=void 0,this.isAvailable=!1,this.openListener=void 0,this.closeListener=void 0,this.messageListener=void 0,this.sendMessage=message=>{void 0!==this.socket&&this.isAvailable&&this.socket.send(JSON.stringify(message))},this.setOpenListener=listener=>{this.openListener=listener},this.setCloseListener=listener=>{this.closeListener=listener},this.setMessageListener=listener=>{this.messageListener=listener},this.getUrl=()=>this.url,this.handleOpen=()=>{void 0!==this.socket&&(this.isAvailable=!0,this.socket.removeEventListener("open",this.handleOpen),this.socket.addEventListener("message",this.handleMessage),this.socket.addEventListener("close",this.handleClosed),this.openListener?.())},this.handleClosed=ev=>{void 0!==this.socket&&(this.stop(),this.closeListener?.(ev.reason,!1))},this.handleError=_ev=>{void 0!==this.socket&&(this.stop(),this.closeListener?.("Unable to connect",!0))},this.handleMessage=ev=>{try{const message=JSON.parse(ev.data);if("object"!=typeof message)throw new Error("Unexpected message: "+typeof message);if("string"!=typeof message.type)throw new Error("Unexpected message type: "+typeof message.type);if("number"!=typeof message.channel)throw new Error("Unexpected message channel: "+typeof message.channel);if(void 0===this.messageListener)return console.warn("No message listener set");this.messageListener(message)}catch(error){console.error(error instanceof Error?error:new Error("Parsing error:"+String(error)))}},this.url=url}start(){void 0===this.socket&&(this.socket=new WebSocket(this.url),this.socket.addEventListener("open",this.handleOpen),this.socket.addEventListener("error",this.handleError),this.socket.addEventListener("close",this.handleClosed))}stop(){void 0!==this.socket&&(this.socket.removeEventListener("open",this.handleOpen),this.socket.removeEventListener("error",this.handleError),this.socket.removeEventListener("close",this.handleClosed),this.socket.removeEventListener("message",this.handleMessage),this.socket.close(),this.socket=void 0,this.isAvailable=!1)}}const DEFAULT_CONNECTION_DETAILS={protocolVersion:"0.1",clientVersion:"DXF-JS/0.3.0"};exports.DXLINK_WS_PROTOCOL_VERSION="0.1",exports.DXLinkWebSocketClient=class{constructor(config){this.config=void 0,this.logger=void 0,this.scheduler=new dxlinkCore.Scheduler,this.connector=void 0,this.connectionState=dxlinkCore.DXLinkConnectionState.NOT_CONNECTED,this.connectionDetails=DEFAULT_CONNECTION_DETAILS,this.authState=dxlinkCore.DXLinkAuthState.UNAUTHORIZED,this.connectionStateChangeListeners=new Set,this.errorListeners=new Set,this.authStateChangeListeners=new Set,this.isFirstAuthState=!0,this.lastSettedAuthToken=void 0,this.lastReceivedMillis=0,this.lastSentMillis=0,this.reconnectAttempts=0,this.globalChannelId=1,this.channels=new Map,this.connect=url=>{this.connector?.getUrl()!==url&&(this.disconnect(),this.logger.debug("Connecting to",url),this.setConnectionState(dxlinkCore.DXLinkConnectionState.CONNECTING),this.connector=new WebSocketConnector(url),this.connector.setOpenListener(this.processTransportOpen),this.connector.setMessageListener(this.processMessage),this.connector.setCloseListener(this.processTransportClose),this.connector.start())},this.reconnect=()=>{if(this.config.maxReconnectAttempts>0&&this.reconnectAttempts>=this.config.maxReconnectAttempts)return this.logger.warn("Max reconnect attempts reached"),void this.disconnect();if(this.connectionState!==dxlinkCore.DXLinkConnectionState.NOT_CONNECTED&&void 0!==this.connector){this.logger.debug("Trying to reconnect",this.connector.getUrl()),this.connector.stop(),this.scheduler.clear(),this.connectionDetails=DEFAULT_CONNECTION_DETAILS,this.lastReceivedMillis=0,this.lastSentMillis=0,this.isFirstAuthState=!0,this.reconnectAttempts++,this.setConnectionState(dxlinkCore.DXLinkConnectionState.CONNECTING);for(const channel of this.channels.values())channel.getState()!==dxlinkCore.DXLinkChannelState.CLOSED&&channel.processStatusRequested();this.scheduler.schedule(()=>{void 0!==this.connector&&this.connector.start()},1e3*this.reconnectAttempts,"RECONNECT")}},this.disconnect=()=>{this.connectionState!==dxlinkCore.DXLinkConnectionState.NOT_CONNECTED&&(this.logger.debug("Disconnecting"),this.connector?.stop(),this.connector=void 0,this.scheduler.clear(),this.connectionDetails=DEFAULT_CONNECTION_DETAILS,this.lastReceivedMillis=0,this.lastSentMillis=0,this.isFirstAuthState=!0,this.reconnectAttempts=0,this.setConnectionState(dxlinkCore.DXLinkConnectionState.NOT_CONNECTED),this.setAuthState(dxlinkCore.DXLinkAuthState.UNAUTHORIZED))},this.close=()=>{this.disconnect()},this.getConnectionDetails=()=>this.connectionDetails,this.getConnectionState=()=>this.connectionState,this.addConnectionStateChangeListener=listener=>this.connectionStateChangeListeners.add(listener),this.removeConnectionStateChangeListener=listener=>this.connectionStateChangeListeners.delete(listener),this.setAuthToken=token=>{this.lastSettedAuthToken=token,this.connectionState===dxlinkCore.DXLinkConnectionState.CONNECTED&&this.sendAuthMessage(token)},this.getAuthState=()=>this.authState,this.addAuthStateChangeListener=listener=>this.authStateChangeListeners.add(listener),this.removeAuthStateChangeListener=listener=>this.authStateChangeListeners.delete(listener),this.addErrorListener=listener=>this.errorListeners.add(listener),this.removeErrorListener=listener=>this.errorListeners.delete(listener),this.openChannel=(service,parameters)=>{const channelId=this.globalChannelId;this.globalChannelId+=2;const channel=new DXLinkWebSocketChannel(channelId,service,parameters,this.sendMessage,this.config);return this.channels.set(channelId,channel),this.connectionState===dxlinkCore.DXLinkConnectionState.CONNECTED&&this.authState===dxlinkCore.DXLinkAuthState.AUTHORIZED&&channel.request(),channel},this.setConnectionState=newStatus=>{const prev=this.connectionState;if(prev!==newStatus){this.connectionState=newStatus;for(const listener of this.connectionStateChangeListeners)listener(newStatus,prev)}},this.sendMessage=message=>{this.connector?.sendMessage(message),this.scheduleKeepalive(),this.lastSentMillis=Date.now()},this.sendAuthMessage=token=>{this.logger.debug("Sending auth message"),this.setAuthState(dxlinkCore.DXLinkAuthState.AUTHORIZING),this.sendMessage({type:"AUTH",channel:0,token:token})},this.setAuthState=newState=>{const prev=this.authState;this.authState=newState;for(const listener of this.authStateChangeListeners)try{listener(newState,prev)}catch(e){this.logger.error("Auth state listener error",e)}},this.processMessage=message=>{if(this.lastReceivedMillis=Date.now(),this.lastReceivedMillis-this.lastSentMillis>=1e3*this.config.keepaliveInterval&&this.sendMessage({type:"KEEPALIVE",channel:0}),(message=>0===message.channel&&("SETUP"===message.type||"KEEPALIVE"===message.type||"AUTH"===message.type||"AUTH_STATE"===message.type||"ERROR"===message.type))(message))switch(message.type){case"SETUP":return this.processSetupMessage(message);case"AUTH_STATE":return this.processAuthStateMessage(message);case"ERROR":return this.publishError({type:message.error,message:message.message});case"KEEPALIVE":return}else if((message=>0!==message.channel)(message)){const channel=this.channels.get(message.channel);if(void 0===channel)return void this.logger.warn("Received lifecycle message for unknown channel",message);if((message=>"CHANNEL_OPENED"===message.type||"CHANNEL_CLOSED"===message.type||"ERROR"===message.type||"CHANNEL_REQUEST"===message.type||"CHANNEL_CANCEL"===message.type)(message)){switch(message.type){case"CHANNEL_OPENED":return channel.processStatusOpened();case"CHANNEL_CLOSED":return channel.processStatusClosed();case"ERROR":return channel.processError({type:message.error,message:message.message})}return}return channel.processPayloadMessage(message)}this.logger.warn("Unhandeled message",message.type)},this.processSetupMessage=serverSetup=>{this.scheduler.cancel("SETUP_TIMEOUT"),this.connectionState!==dxlinkCore.DXLinkConnectionState.CONNECTING&&this.connectionState!==dxlinkCore.DXLinkConnectionState.CONNECTED||(this.connectionDetails={...this.connectionDetails,serverVersion:serverSetup.version,clientKeepaliveTimeout:this.config.keepaliveTimeout,serverKeepaliveTimeout:serverSetup.keepaliveTimeout},this.reconnectAttempts=0,void 0===this.lastSettedAuthToken&&this.setConnectionState(dxlinkCore.DXLinkConnectionState.CONNECTED));const timeoutMills=1e3*(serverSetup.keepaliveTimeout??60);this.scheduler.schedule(()=>this.timeoutCheck(timeoutMills),timeoutMills,"TIMEOUT")},this.publishError=error=>{if(this.logger.debug("Publishing error",error),0!==this.errorListeners.size)for(const listener of this.errorListeners)try{listener(error)}catch(e){this.logger.error("Error listener error",e)}else this.logger.error("Unhandled dxLink error",error)},this.processAuthStateMessage=({state:state})=>{this.logger.debug("Received auth state message",state),this.scheduler.cancel("AUTH_STATE_TIMEOUT"),this.isFirstAuthState?this.isFirstAuthState=!1:"UNAUTHORIZED"===state&&(this.lastSettedAuthToken=void 0),"AUTHORIZED"===state&&(this.setConnectionState(dxlinkCore.DXLinkConnectionState.CONNECTED),this.requestActiveChannels()),this.setAuthState(dxlinkCore.DXLinkAuthState[state])},this.requestActiveChannels=()=>{for(const channel of this.channels.values())channel.getState()!==dxlinkCore.DXLinkChannelState.CLOSED?channel.request():this.channels.delete(channel.id)},this.processTransportOpen=()=>{this.logger.debug("Connection opened");const setupMessage={type:"SETUP",channel:0,version:`${this.connectionDetails.protocolVersion}-${this.connectionDetails.clientVersion}`,keepaliveTimeout:this.config.keepaliveTimeout,acceptKeepaliveTimeout:this.config.acceptKeepaliveTimeout};this.scheduler.schedule(()=>{const errorMessage={type:"ERROR",channel:0,error:"TIMEOUT",message:"No setup message received for "+this.config.actionTimeout+"s"};this.sendMessage(errorMessage),this.publishError({type:errorMessage.error,message:`${errorMessage.message} from server`}),this.reconnect()},1e3*this.config.actionTimeout,"SETUP_TIMEOUT"),this.sendMessage(setupMessage),this.scheduler.schedule(()=>{const errorMessage={type:"ERROR",channel:0,error:"TIMEOUT",message:"No auth state message received for "+this.config.actionTimeout+"s"};this.sendMessage(errorMessage),this.publishError({type:errorMessage.error,message:`${errorMessage.message} from server`}),this.reconnect()},1e3*this.config.actionTimeout,"AUTH_STATE_TIMEOUT"),void 0!==this.lastSettedAuthToken&&this.sendAuthMessage(this.lastSettedAuthToken)},this.processTransportClose=(reason,error)=>{if(this.logger.debug("Connection closed",reason),void 0!==error&&this.publishError({type:"UNKNOWN",message:reason}),this.authState===dxlinkCore.DXLinkAuthState.UNAUTHORIZED)return this.lastSettedAuthToken=void 0,void this.disconnect();this.reconnect()},this.timeoutCheck=timeoutMills=>{const noKeepaliveDuration=Date.now()-this.lastReceivedMillis;if(noKeepaliveDuration>=timeoutMills)return this.sendMessage({type:"ERROR",channel:0,error:"TIMEOUT",message:"No keepalive received for "+noKeepaliveDuration+"ms"}),this.reconnect();const nextTimeout=Math.max(200,timeoutMills-noKeepaliveDuration);this.scheduler.schedule(()=>this.timeoutCheck(timeoutMills),nextTimeout,"TIMEOUT")},this.scheduleKeepalive=()=>{this.scheduler.schedule(()=>{this.sendMessage({type:"KEEPALIVE",channel:0}),this.scheduleKeepalive()},1e3*this.config.keepaliveInterval,"KEEPALIVE")},this.config={keepaliveInterval:30,keepaliveTimeout:60,acceptKeepaliveTimeout:60,actionTimeout:10,logLevel:dxlinkCore.DXLinkLogLevel.WARN,maxReconnectAttempts:-1,...config},this.logger=new dxlinkCore.Logger(this.constructor.name,this.config.logLevel)}};
+var dxlinkCore=require("@dxfeed/dxlink-core");class DXLinkWebSocketChannel{constructor(id,service,parameters,sendMessage,config){this.id=void 0,this.service=void 0,this.parameters=void 0,this.sendMessage=void 0,this.status=dxlinkCore.DXLinkChannelState.REQUESTED,this.messageListeners=new Set,this.statusListeners=new Set,this.errorListeners=new Set,this.logger=void 0,this.send=({type:type,...payload})=>{if(this.status!==dxlinkCore.DXLinkChannelState.OPENED)throw new Error("Channel is not ready");this.sendMessage({type:type,channel:this.id,...payload})},this.addMessageListener=listener=>this.messageListeners.add(listener),this.removeMessageListener=listener=>this.messageListeners.delete(listener),this.getState=()=>this.status,this.addStateChangeListener=listener=>this.statusListeners.add(listener),this.removeStateChangeListener=listener=>this.statusListeners.delete(listener),this.addErrorListener=listener=>this.errorListeners.add(listener),this.removeErrorListener=listener=>this.errorListeners.delete(listener),this.error=({type:type,message:message})=>this.send({type:"ERROR",error:type,message:message}),this.close=()=>{this.status!==dxlinkCore.DXLinkChannelState.CLOSED&&(this.logger.debug("Closing by user"),this.setStatus(dxlinkCore.DXLinkChannelState.CLOSED),this.clear(),this.sendMessage({type:"CHANNEL_CANCEL",channel:this.id}))},this.request=()=>{this.logger.debug("Requesting"),this.sendMessage({type:"CHANNEL_REQUEST",channel:this.id,service:this.service,parameters:this.parameters}),this.processStatusRequested()},this.processPayloadMessage=message=>{for(const listener of this.messageListeners)listener(message)},this.processStatusOpened=()=>{this.logger.debug("Opened"),this.setStatus(dxlinkCore.DXLinkChannelState.OPENED)},this.processStatusRequested=()=>{this.setStatus(dxlinkCore.DXLinkChannelState.REQUESTED)},this.processStatusClosed=()=>{this.logger.debug("Closed by remote endpoint"),this.setStatus(dxlinkCore.DXLinkChannelState.CLOSED),this.clear()},this.processError=error=>{if(0!==this.errorListeners.size)for(const listener of this.errorListeners)try{listener(error)}catch(e){this.logger.error(`Error in channel#${this.id} error listener: `,e)}else this.logger.error(`Unhandled error in channel#${this.id}: `,error)},this.setStatus=newStatus=>{if(this.status===newStatus)return;const prev=this.status;this.status=newStatus;for(const listener of this.statusListeners)try{listener(newStatus,prev)}catch(e){this.logger.error(`Error in channel#${this.id} status listener: `,e)}},this.clear=()=>{this.messageListeners.clear(),this.statusListeners.clear()},this.id=id,this.service=service,this.parameters=parameters,this.sendMessage=sendMessage,this.logger=new dxlinkCore.Logger(`${DXLinkWebSocketChannel.name}#${id} ${service}`,config.logLevel)}}class DefaultDXLinkWebSocketConnector{constructor(url,protocols){this.url=void 0,this.protocols=void 0,this.socket=void 0,this.isAvailable=!1,this.openListener=void 0,this.closeListener=void 0,this.messageListener=void 0,this.sendMessage=message=>{void 0!==this.socket&&this.isAvailable&&this.socket.send(JSON.stringify(message))},this.setOpenListener=listener=>{this.openListener=listener},this.setCloseListener=listener=>{this.closeListener=listener},this.setMessageListener=listener=>{this.messageListener=listener},this.getUrl=()=>this.url,this.handleOpen=()=>{void 0!==this.socket&&(this.isAvailable=!0,this.socket.removeEventListener("open",this.handleOpen),this.socket.addEventListener("message",this.handleMessage),this.socket.addEventListener("close",this.handleClosed),this.openListener?.())},this.handleClosed=ev=>{void 0!==this.socket&&(this.stop(),this.closeListener?.(ev.reason,!1))},this.handleError=_ev=>{void 0!==this.socket&&(this.stop(),this.closeListener?.("Unable to connect",!0))},this.handleMessage=ev=>{try{const message=JSON.parse(ev.data);if("object"!=typeof message)throw new Error("Unexpected message: "+typeof message);if("string"!=typeof message.type)throw new Error("Unexpected message type: "+typeof message.type);if("number"!=typeof message.channel)throw new Error("Unexpected message channel: "+typeof message.channel);if(void 0===this.messageListener)return console.warn("No message listener set");this.messageListener(message)}catch(error){console.error(error instanceof Error?error:new Error("Parsing error:"+String(error)))}},this.url=url,this.protocols=protocols}start(){void 0===this.socket&&(this.socket=new WebSocket(this.url,this.protocols),this.socket.addEventListener("open",this.handleOpen),this.socket.addEventListener("error",this.handleError),this.socket.addEventListener("close",this.handleClosed))}stop(){void 0!==this.socket&&(this.socket.removeEventListener("open",this.handleOpen),this.socket.removeEventListener("error",this.handleError),this.socket.removeEventListener("close",this.handleClosed),this.socket.removeEventListener("message",this.handleMessage),this.socket.close(),this.socket=void 0,this.isAvailable=!1)}}const DEFAULT_CONNECTION_DETAILS={protocolVersion:"0.1",clientVersion:"DXF-JS/0.4.0"};exports.DXLINK_WS_PROTOCOL_VERSION="0.1",exports.DXLinkWebSocketClient=class{constructor(config){this.config=void 0,this.logger=void 0,this.scheduler=new dxlinkCore.Scheduler,this.connector=void 0,this.connectionState=dxlinkCore.DXLinkConnectionState.NOT_CONNECTED,this.connectionDetails=DEFAULT_CONNECTION_DETAILS,this.authState=dxlinkCore.DXLinkAuthState.UNAUTHORIZED,this.connectionStateChangeListeners=new Set,this.errorListeners=new Set,this.authStateChangeListeners=new Set,this.isFirstAuthState=!0,this.lastSettedAuthToken=void 0,this.lastReceivedMillis=0,this.lastSentMillis=0,this.reconnectAttempts=0,this.globalChannelId=1,this.channels=new Map,this.connect=url=>{this.connector?.getUrl()!==url&&(this.disconnect(),this.logger.debug("Connecting to",url),this.setConnectionState(dxlinkCore.DXLinkConnectionState.CONNECTING),this.connector=this.config.connectorFactory(url),this.connector.setOpenListener(this.processTransportOpen),this.connector.setMessageListener(this.processMessage),this.connector.setCloseListener(this.processTransportClose),this.connector.start())},this.reconnect=()=>{if(this.config.maxReconnectAttempts>=0&&this.reconnectAttempts>=this.config.maxReconnectAttempts)return this.logger.warn("Max reconnect attempts reached"),void this.disconnect();if(this.connectionState!==dxlinkCore.DXLinkConnectionState.NOT_CONNECTED&&void 0!==this.connector){this.logger.debug("Trying to reconnect",this.connector.getUrl()),this.connector.stop(),this.scheduler.clear(),this.connectionDetails=DEFAULT_CONNECTION_DETAILS,this.lastReceivedMillis=0,this.lastSentMillis=0,this.isFirstAuthState=!0,this.reconnectAttempts++,this.setConnectionState(dxlinkCore.DXLinkConnectionState.CONNECTING);for(const channel of this.channels.values())channel.getState()!==dxlinkCore.DXLinkChannelState.CLOSED&&channel.processStatusRequested();this.scheduler.schedule(()=>{void 0!==this.connector&&this.connector.start()},1e3*this.reconnectAttempts,"RECONNECT")}},this.disconnect=()=>{this.connectionState!==dxlinkCore.DXLinkConnectionState.NOT_CONNECTED&&(this.logger.debug("Disconnecting"),this.connector?.stop(),this.connector=void 0,this.scheduler.clear(),this.connectionDetails=DEFAULT_CONNECTION_DETAILS,this.lastReceivedMillis=0,this.lastSentMillis=0,this.isFirstAuthState=!0,this.reconnectAttempts=0,this.setConnectionState(dxlinkCore.DXLinkConnectionState.NOT_CONNECTED),this.setAuthState(dxlinkCore.DXLinkAuthState.UNAUTHORIZED))},this.close=()=>{this.disconnect()},this.getConnectionDetails=()=>this.connectionDetails,this.getConnectionState=()=>this.connectionState,this.addConnectionStateChangeListener=listener=>this.connectionStateChangeListeners.add(listener),this.removeConnectionStateChangeListener=listener=>this.connectionStateChangeListeners.delete(listener),this.setAuthToken=token=>{this.lastSettedAuthToken=token,this.connectionState===dxlinkCore.DXLinkConnectionState.CONNECTED&&this.sendAuthMessage(token)},this.getAuthState=()=>this.authState,this.addAuthStateChangeListener=listener=>this.authStateChangeListeners.add(listener),this.removeAuthStateChangeListener=listener=>this.authStateChangeListeners.delete(listener),this.addErrorListener=listener=>this.errorListeners.add(listener),this.removeErrorListener=listener=>this.errorListeners.delete(listener),this.openChannel=(service,parameters)=>{const channelId=this.globalChannelId;this.globalChannelId+=2;const channel=new DXLinkWebSocketChannel(channelId,service,parameters,this.sendMessage,this.config);return this.channels.set(channelId,channel),this.connectionState===dxlinkCore.DXLinkConnectionState.CONNECTED&&this.authState===dxlinkCore.DXLinkAuthState.AUTHORIZED&&channel.request(),channel},this.setConnectionState=newStatus=>{const prev=this.connectionState;if(prev!==newStatus){this.connectionState=newStatus;for(const listener of this.connectionStateChangeListeners)listener(newStatus,prev)}},this.sendMessage=message=>{this.connector?.sendMessage(message),this.scheduleKeepalive(),this.lastSentMillis=Date.now()},this.sendAuthMessage=token=>{this.logger.debug("Sending auth message"),this.setAuthState(dxlinkCore.DXLinkAuthState.AUTHORIZING),this.sendMessage({type:"AUTH",channel:0,token:token})},this.setAuthState=newState=>{const prev=this.authState;this.authState=newState;for(const listener of this.authStateChangeListeners)try{listener(newState,prev)}catch(e){this.logger.error("Auth state listener error",e)}},this.processMessage=message=>{if(this.lastReceivedMillis=Date.now(),this.lastReceivedMillis-this.lastSentMillis>=1e3*this.config.keepaliveInterval&&this.sendMessage({type:"KEEPALIVE",channel:0}),(message=>0===message.channel&&("SETUP"===message.type||"KEEPALIVE"===message.type||"AUTH"===message.type||"AUTH_STATE"===message.type||"ERROR"===message.type))(message))switch(message.type){case"SETUP":return this.processSetupMessage(message);case"AUTH_STATE":return this.processAuthStateMessage(message);case"ERROR":return this.publishError({type:message.error,message:message.message});case"KEEPALIVE":return}else if((message=>0!==message.channel)(message)){const channel=this.channels.get(message.channel);if(void 0===channel)return void this.logger.warn("Received lifecycle message for unknown channel",message);if((message=>"CHANNEL_OPENED"===message.type||"CHANNEL_CLOSED"===message.type||"ERROR"===message.type||"CHANNEL_REQUEST"===message.type||"CHANNEL_CANCEL"===message.type)(message)){switch(message.type){case"CHANNEL_OPENED":return channel.processStatusOpened();case"CHANNEL_CLOSED":return channel.processStatusClosed();case"ERROR":return channel.processError({type:message.error,message:message.message})}return}return channel.processPayloadMessage(message)}this.logger.warn("Unhandeled message",message.type)},this.processSetupMessage=serverSetup=>{this.scheduler.cancel("SETUP_TIMEOUT"),this.connectionState!==dxlinkCore.DXLinkConnectionState.CONNECTING&&this.connectionState!==dxlinkCore.DXLinkConnectionState.CONNECTED||(this.connectionDetails={...this.connectionDetails,serverVersion:serverSetup.version,clientKeepaliveTimeout:this.config.keepaliveTimeout,serverKeepaliveTimeout:serverSetup.keepaliveTimeout},this.reconnectAttempts=0,void 0===this.lastSettedAuthToken&&this.setConnectionState(dxlinkCore.DXLinkConnectionState.CONNECTED));const timeoutMills=1e3*(serverSetup.keepaliveTimeout??60);this.scheduler.schedule(()=>this.timeoutCheck(timeoutMills),timeoutMills,"TIMEOUT")},this.publishError=error=>{if(this.logger.debug("Publishing error",error),0!==this.errorListeners.size)for(const listener of this.errorListeners)try{listener(error)}catch(e){this.logger.error("Error listener error",e)}else this.logger.error("Unhandled dxLink error",error)},this.processAuthStateMessage=({state:state})=>{this.logger.debug("Received auth state message",state),this.scheduler.cancel("AUTH_STATE_TIMEOUT"),this.isFirstAuthState?this.isFirstAuthState=!1:"UNAUTHORIZED"===state&&(this.lastSettedAuthToken=void 0),"AUTHORIZED"===state&&(this.setConnectionState(dxlinkCore.DXLinkConnectionState.CONNECTED),this.requestActiveChannels()),this.setAuthState(dxlinkCore.DXLinkAuthState[state])},this.requestActiveChannels=()=>{for(const channel of this.channels.values())channel.getState()!==dxlinkCore.DXLinkChannelState.CLOSED?channel.request():this.channels.delete(channel.id)},this.processTransportOpen=()=>{this.logger.debug("Connection opened");const setupMessage={type:"SETUP",channel:0,version:`${this.connectionDetails.protocolVersion}-${this.connectionDetails.clientVersion}`,keepaliveTimeout:this.config.keepaliveTimeout,acceptKeepaliveTimeout:this.config.acceptKeepaliveTimeout};this.scheduler.schedule(()=>{const errorMessage={type:"ERROR",channel:0,error:"TIMEOUT",message:"No setup message received for "+this.config.actionTimeout+"s"};this.sendMessage(errorMessage),this.publishError({type:errorMessage.error,message:`${errorMessage.message} from server`}),this.reconnect()},1e3*this.config.actionTimeout,"SETUP_TIMEOUT"),this.sendMessage(setupMessage),this.scheduler.schedule(()=>{const errorMessage={type:"ERROR",channel:0,error:"TIMEOUT",message:"No auth state message received for "+this.config.actionTimeout+"s"};this.sendMessage(errorMessage),this.publishError({type:errorMessage.error,message:`${errorMessage.message} from server`}),this.reconnect()},1e3*this.config.actionTimeout,"AUTH_STATE_TIMEOUT"),void 0!==this.lastSettedAuthToken&&this.sendAuthMessage(this.lastSettedAuthToken)},this.processTransportClose=(reason,error)=>{if(this.logger.debug("Connection closed",reason),void 0!==error&&this.publishError({type:"UNKNOWN",message:reason}),this.authState===dxlinkCore.DXLinkAuthState.UNAUTHORIZED)return this.lastSettedAuthToken=void 0,void this.disconnect();this.reconnect()},this.timeoutCheck=timeoutMills=>{const noKeepaliveDuration=Date.now()-this.lastReceivedMillis;if(noKeepaliveDuration>=timeoutMills)return this.sendMessage({type:"ERROR",channel:0,error:"TIMEOUT",message:"No keepalive received for "+noKeepaliveDuration+"ms"}),this.reconnect();const nextTimeout=Math.max(200,timeoutMills-noKeepaliveDuration);this.scheduler.schedule(()=>this.timeoutCheck(timeoutMills),nextTimeout,"TIMEOUT")},this.scheduleKeepalive=()=>{this.scheduler.schedule(()=>{this.sendMessage({type:"KEEPALIVE",channel:0}),this.scheduleKeepalive()},1e3*this.config.keepaliveInterval,"KEEPALIVE")},this.config={keepaliveInterval:30,keepaliveTimeout:60,acceptKeepaliveTimeout:60,actionTimeout:10,logLevel:dxlinkCore.DXLinkLogLevel.WARN,maxReconnectAttempts:-1,connectorFactory:url=>new DefaultDXLinkWebSocketConnector(url),...config},this.logger=new dxlinkCore.Logger(this.constructor.name,this.config.logLevel)}},exports.DefaultDXLinkWebSocketConnector=DefaultDXLinkWebSocketConnector;
 //# sourceMappingURL=index.js.map

build/index.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"index.js","sources":["../src/channel.ts","../src/connector.ts","../src/client.ts","../src/messages.ts"],"sourcesContent":["import {\n  type DXLinkLogger,\n  Logger,\n  type DXLinkChannel,\n  DXLinkChannelState,\n  type DXLinkChannelMessageListener,\n  type DXLinkChannelStateChangeListener,\n  type DXLinkErrorListener,\n  type DXLinkChannelMessage,\n  type DXLinkError,\n} from '@dxfeed/dxlink-core'\n\nimport { type DXLinkWebSocketClientConfig } from './config'\nimport { type ChannelPayloadMessage, type Message } from './messages'\n\n/**\n * A DXLink channel implementation.\n * @internal\n */\nexport class DXLinkWebSocketChannel implements DXLinkChannel {\n  private status = DXLinkChannelState.REQUESTED\n\n  // Listeners\n  private readonly messageListeners = new Set<DXLinkChannelMessageListener>()\n  private readonly statusListeners = new Set<DXLinkChannelStateChangeListener>()\n  private readonly errorListeners = new Set<DXLinkErrorListener>()\n\n  private logger: DXLinkLogger\n\n  constructor(\n    public readonly id: number,\n    public readonly service: string,\n    public readonly parameters: Record<string, unknown>,\n    private readonly sendMessage: (message: Message) => void,\n    config: DXLinkWebSocketClientConfig\n  ) {\n    this.logger = new Logger(`${DXLinkWebSocketChannel.name}#${id} ${service}`, config.logLevel)\n  }\n\n  send = ({ type, ...payload }: DXLinkChannelMessage) => {\n    if (this.status !== DXLinkChannelState.OPENED) {\n      throw new Error('Channel is not ready')\n    }\n\n    this.sendMessage({\n      type,\n      channel: this.id,\n      ...payload,\n    })\n  }\n\n  addMessageListener = (listener: DXLinkChannelMessageListener) =>\n    this.messageListeners.add(listener)\n  removeMessageListener = (listener: DXLinkChannelMessageListener) =>\n    this.messageListeners.delete(listener)\n\n  getState = () => this.status\n  addStateChangeListener = (listener: DXLinkChannelStateChangeListener) =>\n    this.statusListeners.add(listener)\n  removeStateChangeListener = (listener: DXLinkChannelStateChangeListener) =>\n    this.statusListeners.delete(listener)\n\n  addErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.add(listener)\n  removeErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.delete(listener)\n\n  error = ({ type, message }: DXLinkError) =>\n    this.send({\n      type: 'ERROR',\n      error: type,\n      message,\n    })\n\n  close = () => {\n    if (this.status === DXLinkChannelState.CLOSED) return\n\n    this.logger.debug(`Closing by user`)\n\n    // We can think that channel is closed already\n    this.setStatus(DXLinkChannelState.CLOSED)\n\n    this.clear()\n\n    this.sendMessage({\n      type: 'CHANNEL_CANCEL',\n      channel: this.id,\n    })\n  }\n\n  request = () => {\n    this.logger.debug('Requesting')\n\n    this.sendMessage({\n      type: 'CHANNEL_REQUEST',\n      channel: this.id,\n      service: this.service,\n      parameters: this.parameters,\n    })\n\n    this.processStatusRequested()\n  }\n\n  processPayloadMessage = (message: ChannelPayloadMessage) => {\n    for (const listener of this.messageListeners) {\n      listener(message)\n    }\n  }\n\n  processStatusOpened = () => {\n    this.logger.debug('Opened')\n\n    this.setStatus(DXLinkChannelState.OPENED)\n  }\n\n  processStatusRequested = () => {\n    this.setStatus(DXLinkChannelState.REQUESTED)\n  }\n\n  processStatusClosed = () => {\n    this.logger.debug('Closed by remote endpoint')\n\n    this.setStatus(DXLinkChannelState.CLOSED)\n    this.clear()\n  }\n\n  processError = (error: DXLinkError) => {\n    if (this.errorListeners.size === 0) {\n      this.logger.error(`Unhandled error in channel#${this.id}: `, error)\n      return\n    }\n\n    for (const listener of this.errorListeners) {\n      try {\n        listener(error)\n      } catch (e) {\n        this.logger.error(`Error in channel#${this.id} error listener: `, e)\n      }\n    }\n  }\n\n  private setStatus = (newStatus: DXLinkChannelState) => {\n    if (this.status === newStatus) return\n\n    const prev = this.status\n    this.status = newStatus\n    for (const listener of this.statusListeners) {\n      try {\n        listener(newStatus, prev)\n      } catch (e) {\n        this.logger.error(`Error in channel#${this.id} status listener: `, e)\n      }\n    }\n  }\n\n  private clear = () => {\n    this.messageListeners.clear()\n    this.statusListeners.clear()\n    // TODO: rethink approach when error came after channel is closed\n    // this.errorListeners.clear()\n  }\n}\n","import { type Message } from './messages'\n\ntype CloseListener = (reason: string, error: boolean) => void\n\n/**\n * Connector for the WebSocket connection.\n * @internal\n */\nexport class WebSocketConnector {\n  private socket: WebSocket | undefined = undefined\n\n  private isAvailable = false\n\n  private openListener: (() => void) | undefined = undefined\n  private closeListener: CloseListener | undefined = undefined\n  private messageListener: ((message: Message) => void) | undefined = undefined\n\n  constructor(private readonly url: string) {}\n\n  start() {\n    if (this.socket !== undefined) return\n\n    this.socket = new WebSocket(this.url)\n\n    this.socket.addEventListener('open', this.handleOpen)\n    this.socket.addEventListener('error', this.handleError)\n    this.socket.addEventListener('close', this.handleClosed)\n  }\n\n  stop() {\n    if (this.socket === undefined) return\n\n    this.socket.removeEventListener('open', this.handleOpen)\n    this.socket.removeEventListener('error', this.handleError)\n    this.socket.removeEventListener('close', this.handleClosed)\n    this.socket.removeEventListener('message', this.handleMessage)\n\n    this.socket.close()\n    this.socket = undefined\n    this.isAvailable = false\n  }\n\n  sendMessage = (message: Message) => {\n    if (this.socket === undefined || !this.isAvailable) {\n      return\n    }\n\n    this.socket.send(JSON.stringify(message))\n  }\n\n  setOpenListener = (listener: () => void) => {\n    this.openListener = listener\n  }\n\n  setCloseListener = (listener: CloseListener) => {\n    this.closeListener = listener\n  }\n\n  setMessageListener = (listener: (message: Message) => void) => {\n    this.messageListener = listener\n  }\n\n  getUrl = () => this.url\n\n  private handleOpen = () => {\n    if (this.socket === undefined) return\n\n    this.isAvailable = true\n\n    this.socket.removeEventListener('open', this.handleOpen)\n\n    this.socket.addEventListener('message', this.handleMessage)\n    this.socket.addEventListener('close', this.handleClosed)\n\n    this.openListener?.()\n  }\n\n  private handleClosed = (ev: CloseEvent) => {\n    if (this.socket === undefined) return\n\n    this.stop()\n\n    this.closeListener?.(ev.reason, false)\n  }\n\n  private handleError = (_ev: Event) => {\n    if (this.socket === undefined) return\n\n    this.stop()\n\n    this.closeListener?.('Unable to connect', true)\n  }\n\n  private handleMessage = (ev: MessageEvent) => {\n    try {\n      const message = JSON.parse(ev.data)\n      if (typeof message !== 'object') {\n        throw new Error('Unexpected message: ' + typeof message)\n      }\n      if (typeof message.type !== 'string') {\n        throw new Error('Unexpected message type: ' + typeof message.type)\n      }\n      if (typeof message.channel !== 'number') {\n        throw new Error('Unexpected message channel: ' + typeof message.channel)\n      }\n\n      // TODO: validate message properly (e.g. check for type and other fields)\n\n      if (this.messageListener === undefined) {\n        return console.warn('No message listener set')\n      }\n\n      this.messageListener(message)\n    } catch (error) {\n      console.error(error instanceof Error ? error : new Error('Parsing error:' + String(error)))\n    }\n  }\n}\n","import {\n  DXLinkLogLevel,\n  type DXLinkLogger,\n  Logger,\n  Scheduler,\n  type DXLinkConnectionDetails,\n  DXLinkConnectionState,\n  type DXLinkConnectionStateChangeListener,\n  type DXLinkErrorListener,\n  DXLinkAuthState,\n  DXLinkChannelState,\n  type DXLinkAuthStateChangeListener,\n  type DXLinkChannel,\n  type DXLinkError,\n  type DXLinkClient,\n} from '@dxfeed/dxlink-core'\n\nimport { DXLinkWebSocketChannel } from './channel'\nimport type { DXLinkWebSocketClientConfig } from './config'\nimport { WebSocketConnector } from './connector'\nimport {\n  type AuthStateMessage,\n  type ErrorMessage,\n  type Message,\n  type SetupMessage,\n  isChannelLifecycleMessage,\n  isChannelMessage,\n  isConnectionMessage,\n} from './messages'\nimport { VERSION } from './version'\n\n/**\n * Protocol version that is used by client.\n */\nexport const DXLINK_WS_PROTOCOL_VERSION = '0.1'\n\nconst CLIENT_VERSION = `DXF-JS/${VERSION}`\n\nconst DEFAULT_CONNECTION_DETAILS: DXLinkConnectionDetails = {\n  protocolVersion: DXLINK_WS_PROTOCOL_VERSION,\n  clientVersion: CLIENT_VERSION,\n}\n\n/**\n * dxLink WebSocket client that can be used to connect to the remote dxLink WebSocket endpoint and open channels to services.\n */\nexport class DXLinkWebSocketClient implements DXLinkClient {\n  private readonly config: DXLinkWebSocketClientConfig\n\n  private readonly logger: DXLinkLogger\n\n  private readonly scheduler = new Scheduler()\n\n  private connector: WebSocketConnector | undefined\n\n  private connectionState: DXLinkConnectionState = DXLinkConnectionState.NOT_CONNECTED\n  private connectionDetails: DXLinkConnectionDetails = DEFAULT_CONNECTION_DETAILS\n\n  private authState: DXLinkAuthState = DXLinkAuthState.UNAUTHORIZED\n\n  // Listeners\n  private readonly connectionStateChangeListeners = new Set<DXLinkConnectionStateChangeListener>()\n  private readonly errorListeners = new Set<DXLinkErrorListener>()\n  private readonly authStateChangeListeners = new Set<DXLinkAuthStateChangeListener>()\n\n  /**\n   * Authorization type that was determined by server behavior during setup phase.\n   * This value is used to determine if authorization is required or optional or not defined yet.\n   */\n  private isFirstAuthState = true\n  /**\n   * Last setted auth token that will be sent to server after connection is established or re-established.\n   */\n  private lastSettedAuthToken: string | undefined\n\n  // Stats for keepalive\n  // TODO: mb move to connector\n  private lastReceivedMillis = 0\n  private lastSentMillis = 0\n\n  /**\n   * Count of reconnect attempts since last successful connection.\n   */\n  private reconnectAttempts = 0\n\n  // Channels\n  private globalChannelId = 1\n  private readonly channels = new Map<number, DXLinkWebSocketChannel>()\n\n  /**\n   * Create new instance of {@link DXLinkWebSocketClient}.\n   * @param config Configuration of the client.\n   */\n  constructor(config?: Partial<DXLinkWebSocketClientConfig>) {\n    this.config = {\n      keepaliveInterval: 30,\n      keepaliveTimeout: 60,\n      acceptKeepaliveTimeout: 60,\n      actionTimeout: 10,\n      logLevel: DXLinkLogLevel.WARN,\n      maxReconnectAttempts: -1,\n      ...config,\n    }\n\n    this.logger = new Logger(this.constructor.name, this.config.logLevel)\n  }\n\n  connect = (url: string) => {\n    // Do nothing if already connected to the same url\n    if (this.connector?.getUrl() === url) return\n\n    // Disconnect from previous connection if any exists\n    this.disconnect()\n\n    this.logger.debug('Connecting to', url)\n\n    // Immediately set connection state to CONNECTING\n    this.setConnectionState(DXLinkConnectionState.CONNECTING)\n\n    this.connector = new WebSocketConnector(url)\n    this.connector.setOpenListener(this.processTransportOpen)\n    this.connector.setMessageListener(this.processMessage)\n    this.connector.setCloseListener(this.processTransportClose)\n\n    // Initiate websocket connection\n    this.connector.start()\n  }\n\n  reconnect = () => {\n    if (\n      this.config.maxReconnectAttempts > 0 &&\n      this.reconnectAttempts >= this.config.maxReconnectAttempts\n    ) {\n      this.logger.warn('Max reconnect attempts reached')\n\n      this.disconnect()\n      return\n    }\n\n    if (\n      this.connectionState === DXLinkConnectionState.NOT_CONNECTED ||\n      this.connector === undefined\n    )\n      return\n\n    this.logger.debug('Trying to reconnect', this.connector.getUrl())\n\n    this.connector.stop()\n\n    // Clear all timeouts\n    this.scheduler.clear()\n\n    // Set initial state\n    this.connectionDetails = DEFAULT_CONNECTION_DETAILS\n    this.lastReceivedMillis = 0\n    this.lastSentMillis = 0\n    this.isFirstAuthState = true\n\n    // Increase reconnect attempts counter\n    this.reconnectAttempts++\n\n    // Update state for connection and channels\n    this.setConnectionState(DXLinkConnectionState.CONNECTING)\n    for (const channel of this.channels.values()) {\n      if (channel.getState() === DXLinkChannelState.CLOSED) continue\n\n      channel.processStatusRequested()\n    }\n\n    // Schedule reconnect attempt after some time\n    // Additionally, task will be executed in case when tab is active again\n    // coz browser sometimes doesn't run scheduled tasks when tab is inactive\n    this.scheduler.schedule(\n      () => {\n        if (this.connector === undefined) return\n\n        // Start new connection attempt\n        this.connector.start()\n      },\n      this.reconnectAttempts * 1000,\n      'RECONNECT'\n    )\n  }\n\n  disconnect = () => {\n    if (this.connectionState === DXLinkConnectionState.NOT_CONNECTED) return\n\n    this.logger.debug('Disconnecting')\n\n    // Destroy connector\n    this.connector?.stop()\n    this.connector = undefined\n\n    // Clear all timeouts\n    this.scheduler.clear()\n\n    // Set initial state\n    this.connectionDetails = DEFAULT_CONNECTION_DETAILS\n    this.lastReceivedMillis = 0\n    this.lastSentMillis = 0\n    this.isFirstAuthState = true\n    this.reconnectAttempts = 0\n\n    this.setConnectionState(DXLinkConnectionState.NOT_CONNECTED)\n    this.setAuthState(DXLinkAuthState.UNAUTHORIZED)\n  }\n\n  close = () => {\n    this.disconnect()\n  }\n\n  getConnectionDetails = () => this.connectionDetails\n  getConnectionState = () => this.connectionState\n  addConnectionStateChangeListener = (listener: DXLinkConnectionStateChangeListener) =>\n    this.connectionStateChangeListeners.add(listener)\n  removeConnectionStateChangeListener = (listener: DXLinkConnectionStateChangeListener) =>\n    this.connectionStateChangeListeners.delete(listener)\n\n  setAuthToken = (token: string): void => {\n    this.lastSettedAuthToken = token\n\n    if (this.connectionState === DXLinkConnectionState.CONNECTED) {\n      this.sendAuthMessage(token)\n    }\n  }\n\n  getAuthState = (): DXLinkAuthState => this.authState\n  addAuthStateChangeListener = (listener: DXLinkAuthStateChangeListener) =>\n    this.authStateChangeListeners.add(listener)\n  removeAuthStateChangeListener = (listener: DXLinkAuthStateChangeListener) =>\n    this.authStateChangeListeners.delete(listener)\n\n  addErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.add(listener)\n  removeErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.delete(listener)\n\n  openChannel = (service: string, parameters: Record<string, unknown>): DXLinkChannel => {\n    const channelId = this.globalChannelId\n    this.globalChannelId += 2\n\n    const channel = new DXLinkWebSocketChannel(\n      channelId,\n      service,\n      parameters,\n      this.sendMessage,\n      this.config\n    )\n\n    this.channels.set(channelId, channel)\n\n    // Send channel request if connection is already established\n    if (\n      this.connectionState === DXLinkConnectionState.CONNECTED &&\n      this.authState === DXLinkAuthState.AUTHORIZED\n    ) {\n      channel.request()\n    }\n\n    return channel\n  }\n\n  private setConnectionState = (newStatus: DXLinkConnectionState) => {\n    const prev = this.connectionState\n    if (prev === newStatus) return\n\n    this.connectionState = newStatus\n    for (const listener of this.connectionStateChangeListeners) {\n      listener(newStatus, prev)\n    }\n  }\n\n  private sendMessage = (message: Message): void => {\n    this.connector?.sendMessage(message)\n\n    this.scheduleKeepalive()\n\n    // TODO: mb move to connector\n    this.lastSentMillis = Date.now()\n  }\n\n  private sendAuthMessage = (token: string): void => {\n    this.logger.debug('Sending auth message')\n\n    this.setAuthState(DXLinkAuthState.AUTHORIZING)\n\n    this.sendMessage({\n      type: 'AUTH',\n      channel: 0,\n      token,\n    })\n  }\n\n  private setAuthState = (newState: DXLinkAuthState): void => {\n    const prev = this.authState\n\n    this.authState = newState\n    for (const listener of this.authStateChangeListeners) {\n      try {\n        listener(newState, prev)\n      } catch (e) {\n        this.logger.error('Auth state listener error', e)\n      }\n    }\n  }\n\n  private processMessage = (message: Message): void => {\n    this.lastReceivedMillis = Date.now()\n\n    // Send keepalive message if no messages sent for a while (keepaliveInterval)\n    // Because browser sometimes doesn't run scheduled tasks when tab is inactive\n    if (this.lastReceivedMillis - this.lastSentMillis >= this.config.keepaliveInterval * 1000) {\n      this.sendMessage({\n        type: 'KEEPALIVE',\n        channel: 0,\n      })\n    }\n\n    // Connection messages are messages that are sent to the channel 0\n    if (isConnectionMessage(message)) {\n      switch (message.type) {\n        case 'SETUP':\n          return this.processSetupMessage(message)\n        case 'AUTH_STATE':\n          return this.processAuthStateMessage(message)\n        case 'ERROR':\n          return this.publishError({\n            type: message.error,\n            message: message.message,\n          })\n        case 'KEEPALIVE':\n          // Ignore keepalive messages coz they are used only to maintain connection\n          return\n      }\n    } else if (isChannelMessage(message)) {\n      const channel = this.channels.get(message.channel)\n      if (channel === undefined) {\n        this.logger.warn('Received lifecycle message for unknown channel', message)\n        return\n      }\n\n      if (isChannelLifecycleMessage(message)) {\n        switch (message.type) {\n          case 'CHANNEL_OPENED':\n            return channel.processStatusOpened()\n          case 'CHANNEL_CLOSED':\n            return channel.processStatusClosed()\n          case 'ERROR':\n            return channel.processError({\n              type: message.error,\n              message: message.message,\n            })\n        }\n        return\n      }\n\n      return channel.processPayloadMessage(message)\n    }\n\n    this.logger.warn('Unhandeled message', message.type)\n  }\n\n  private processSetupMessage = (serverSetup: SetupMessage): void => {\n    // Clear setup timeout check from connect method\n    this.scheduler.cancel('SETUP_TIMEOUT')\n\n    // Mark connection as connected after first setup message and subsequent ones\n    if (\n      this.connectionState === DXLinkConnectionState.CONNECTING ||\n      this.connectionState === DXLinkConnectionState.CONNECTED\n    ) {\n      this.connectionDetails = {\n        ...this.connectionDetails,\n        serverVersion: serverSetup.version,\n        clientKeepaliveTimeout: this.config.keepaliveTimeout,\n        serverKeepaliveTimeout: serverSetup.keepaliveTimeout,\n      }\n\n      // Reset reconnect attempts counter after successful connection\n      this.reconnectAttempts = 0\n\n      if (this.lastSettedAuthToken === undefined) {\n        this.setConnectionState(DXLinkConnectionState.CONNECTED)\n      }\n    }\n\n    // Connection maintance: Setup keepalive timeout check\n    const timeoutMills = (serverSetup.keepaliveTimeout ?? 60) * 1000\n    this.scheduler.schedule(() => this.timeoutCheck(timeoutMills), timeoutMills, 'TIMEOUT')\n  }\n\n  private publishError = (error: DXLinkError): void => {\n    this.logger.debug('Publishing error', error)\n\n    if (this.errorListeners.size === 0) {\n      this.logger.error('Unhandled dxLink error', error)\n      return\n    }\n\n    for (const listener of this.errorListeners) {\n      try {\n        listener(error)\n      } catch (e) {\n        this.logger.error('Error listener error', e)\n      }\n    }\n  }\n\n  private processAuthStateMessage = ({ state }: AuthStateMessage): void => {\n    this.logger.debug('Received auth state message', state)\n\n    // Clear auth state timeout check\n    this.scheduler.cancel('AUTH_STATE_TIMEOUT')\n\n    // Ignore first auth state message because it is sent during connection setup\n    if (this.isFirstAuthState) {\n      this.isFirstAuthState = false\n    } else {\n      // Reset auth token if server rejected it\n      if (state === 'UNAUTHORIZED') {\n        this.lastSettedAuthToken = undefined\n      }\n    }\n\n    // Request active channels if connection is authorized\n    if (state === 'AUTHORIZED') {\n      this.setConnectionState(DXLinkConnectionState.CONNECTED)\n\n      this.requestActiveChannels()\n    }\n\n    this.setAuthState(DXLinkAuthState[state])\n  }\n\n  private requestActiveChannels = (): void => {\n    for (const channel of this.channels.values()) {\n      // clear closed channels\n      if (channel.getState() === DXLinkChannelState.CLOSED) {\n        this.channels.delete(channel.id)\n        continue\n      }\n\n      channel.request()\n    }\n  }\n\n  /**\n   * Process transport open event from connector.\n   * After transport is opened:\n   * - setup message is sent to server\n   * - auth message is sent to server if auth token is set\n   * - wait for setup message from server\n   * - wait for auth state message from server\n   */\n  private processTransportOpen = (): void => {\n    this.logger.debug('Connection opened')\n\n    const setupMessage: SetupMessage = {\n      type: 'SETUP',\n      channel: 0,\n      version: `${this.connectionDetails.protocolVersion}-${this.connectionDetails.clientVersion}`,\n      keepaliveTimeout: this.config.keepaliveTimeout,\n      acceptKeepaliveTimeout: this.config.acceptKeepaliveTimeout,\n    }\n\n    // Setup timeout check\n    this.scheduler.schedule(\n      () => {\n        const errorMessage: ErrorMessage = {\n          type: 'ERROR',\n          channel: 0,\n          error: 'TIMEOUT',\n          message: 'No setup message received for ' + this.config.actionTimeout + 's',\n        }\n\n        this.sendMessage(errorMessage)\n\n        this.publishError({\n          type: errorMessage.error,\n          message: `${errorMessage.message} from server`,\n        })\n\n        // Disconnect if no setup message received\n        this.reconnect()\n      },\n      this.config.actionTimeout * 1000,\n      'SETUP_TIMEOUT'\n    )\n\n    this.sendMessage(setupMessage)\n\n    this.scheduler.schedule(\n      () => {\n        const errorMessage: ErrorMessage = {\n          type: 'ERROR',\n          channel: 0,\n          error: 'TIMEOUT',\n          message: 'No auth state message received for ' + this.config.actionTimeout + 's',\n        }\n\n        this.sendMessage(errorMessage)\n\n        this.publishError({\n          type: errorMessage.error,\n          message: `${errorMessage.message} from server`,\n        })\n\n        // Disconnect if no auth state message received\n        this.reconnect()\n      },\n      this.config.actionTimeout * 1000,\n      'AUTH_STATE_TIMEOUT'\n    )\n\n    if (this.lastSettedAuthToken !== undefined) {\n      this.sendAuthMessage(this.lastSettedAuthToken)\n    }\n  }\n\n  /**\n   *  Process transport close event from connector.\n   *  After transport is closed by server:\n   * - reconnect if connection is authorized\n   * - disconnect if connection is not authorized\n   */\n  private processTransportClose = (reason: string, error: boolean): void => {\n    this.logger.debug('Connection closed', reason)\n\n    if (error !== undefined) {\n      this.publishError({\n        type: 'UNKNOWN',\n        message: reason,\n      })\n    }\n\n    if (this.authState === DXLinkAuthState.UNAUTHORIZED) {\n      this.lastSettedAuthToken = undefined\n      this.disconnect()\n      return\n    }\n\n    this.reconnect()\n  }\n\n  private timeoutCheck = (timeoutMills: number) => {\n    const now = Date.now()\n    const noKeepaliveDuration = now - this.lastReceivedMillis\n    if (noKeepaliveDuration >= timeoutMills) {\n      this.sendMessage({\n        type: 'ERROR',\n        channel: 0,\n        error: 'TIMEOUT',\n        message: 'No keepalive received for ' + noKeepaliveDuration + 'ms',\n      })\n\n      return this.reconnect()\n    }\n\n    const nextTimeout = Math.max(200, timeoutMills - noKeepaliveDuration)\n    this.scheduler.schedule(() => this.timeoutCheck(timeoutMills), nextTimeout, 'TIMEOUT')\n  }\n\n  private scheduleKeepalive = () => {\n    this.scheduler.schedule(\n      () => {\n        this.sendMessage({\n          type: 'KEEPALIVE',\n          channel: 0,\n        })\n\n        this.scheduleKeepalive()\n      },\n      this.config.keepaliveInterval * 1000,\n      'KEEPALIVE'\n    )\n  }\n}\n","export interface AuthMessage {\n  type: 'AUTH'\n  channel: 0\n  token: string\n}\n\nexport type AuthState = 'AUTHORIZED' | 'UNAUTHORIZED'\n\nexport interface AuthStateMessage {\n  type: 'AUTH_STATE'\n  channel: 0\n  state: AuthState\n}\n\nexport interface SetupMessage {\n  type: 'SETUP'\n  channel: 0\n  version: string\n  keepaliveTimeout?: number\n  acceptKeepaliveTimeout?: number\n}\n\nexport interface KeepaliveMessage {\n  type: 'KEEPALIVE'\n  channel: 0\n}\n\nexport interface ChannelRequestMessage {\n  type: 'CHANNEL_REQUEST'\n  channel: number\n  service: string\n  parameters?: Record<string, unknown>\n}\n\nexport interface ChannelCancelMessage {\n  type: 'CHANNEL_CANCEL'\n  channel: number\n}\n\nexport interface ChannelOpenedMessage {\n  type: 'CHANNEL_OPENED'\n  channel: number\n  service: string\n  parameters?: Record<string, unknown>\n}\n\nexport interface ChannelClosedMessage {\n  type: 'CHANNEL_CLOSED'\n  channel: number\n}\n\nexport type ErrorType =\n  | 'UNKNOWN'\n  | 'UNSUPPORTED_PROTOCOL'\n  | 'TIMEOUT'\n  | 'UNAUTHORIZED'\n  | 'INVALID_MESSAGE'\n  | 'BAD_ACTION'\n\nexport interface ErrorMessage {\n  type: 'ERROR'\n  channel: 0\n  error: ErrorType\n  message: string\n}\n\nexport interface ChannelErrorMessage {\n  type: 'ERROR'\n  channel: number\n  error: ErrorType\n  message: string\n}\n\nexport interface ChannelPayloadMessage {\n  type: string\n  channel: number\n  [key: string]: unknown\n}\n\nexport type ConnectionMessage =\n  | SetupMessage\n  | KeepaliveMessage\n  | AuthMessage\n  | AuthStateMessage\n  | ErrorMessage\n\nexport type Message =\n  | SetupMessage\n  | KeepaliveMessage\n  | AuthMessage\n  | AuthStateMessage\n  | ErrorMessage\n  | ChannelRequestMessage\n  | ChannelCancelMessage\n  | ChannelOpenedMessage\n  | ChannelClosedMessage\n  | ChannelPayloadMessage\n  | ChannelErrorMessage\n\nexport const isConnectionMessage = (message: Message): message is ConnectionMessage =>\n  message.channel === 0 &&\n  (message.type === 'SETUP' ||\n    message.type === 'KEEPALIVE' ||\n    message.type === 'AUTH' ||\n    message.type === 'AUTH_STATE' ||\n    message.type === 'ERROR')\n\nexport type ChannelLifecycleMessage =\n  | ChannelOpenedMessage\n  | ChannelClosedMessage\n  | ChannelErrorMessage\n  | ChannelRequestMessage\n  | ChannelCancelMessage\n\nexport type ChannelMessage = ChannelLifecycleMessage | ChannelPayloadMessage\n\nexport const isChannelMessage = (message: Message): message is ChannelMessage =>\n  message.channel !== 0\n\nexport const isChannelLifecycleMessage = (\n  message: ChannelMessage\n): message is 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+{"version":3,"file":"index.js","sources":["../src/channel.ts","../src/connector.ts","../src/client.ts","../src/messages.ts"],"sourcesContent":["import {\n  type DXLinkLogger,\n  Logger,\n  type DXLinkChannel,\n  DXLinkChannelState,\n  type DXLinkChannelMessageListener,\n  type DXLinkChannelStateChangeListener,\n  type DXLinkErrorListener,\n  type DXLinkChannelMessage,\n  type DXLinkError,\n} from '@dxfeed/dxlink-core'\n\nimport { type DXLinkWebSocketClientConfig } from './config'\nimport { type ChannelPayloadMessage, type DXLinkWebSocketMessage } from './messages'\n\n/**\n * A DXLink channel implementation.\n * @internal\n */\nexport class DXLinkWebSocketChannel implements DXLinkChannel {\n  private status = DXLinkChannelState.REQUESTED\n\n  // Listeners\n  private readonly messageListeners = new Set<DXLinkChannelMessageListener>()\n  private readonly statusListeners = new Set<DXLinkChannelStateChangeListener>()\n  private readonly errorListeners = new Set<DXLinkErrorListener>()\n\n  private logger: DXLinkLogger\n\n  constructor(\n    public readonly id: number,\n    public readonly service: string,\n    public readonly parameters: Record<string, unknown>,\n    private readonly sendMessage: (message: DXLinkWebSocketMessage) => void,\n    config: DXLinkWebSocketClientConfig\n  ) {\n    this.logger = new Logger(`${DXLinkWebSocketChannel.name}#${id} ${service}`, config.logLevel)\n  }\n\n  send = ({ type, ...payload }: DXLinkChannelMessage) => {\n    if (this.status !== DXLinkChannelState.OPENED) {\n      throw new Error('Channel is not ready')\n    }\n\n    this.sendMessage({\n      type,\n      channel: this.id,\n      ...payload,\n    })\n  }\n\n  addMessageListener = (listener: DXLinkChannelMessageListener) =>\n    this.messageListeners.add(listener)\n  removeMessageListener = (listener: DXLinkChannelMessageListener) =>\n    this.messageListeners.delete(listener)\n\n  getState = () => this.status\n  addStateChangeListener = (listener: DXLinkChannelStateChangeListener) =>\n    this.statusListeners.add(listener)\n  removeStateChangeListener = (listener: DXLinkChannelStateChangeListener) =>\n    this.statusListeners.delete(listener)\n\n  addErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.add(listener)\n  removeErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.delete(listener)\n\n  error = ({ type, message }: DXLinkError) =>\n    this.send({\n      type: 'ERROR',\n      error: type,\n      message,\n    })\n\n  close = () => {\n    if (this.status === DXLinkChannelState.CLOSED) return\n\n    this.logger.debug(`Closing by user`)\n\n    // We can think that channel is closed already\n    this.setStatus(DXLinkChannelState.CLOSED)\n\n    this.clear()\n\n    this.sendMessage({\n      type: 'CHANNEL_CANCEL',\n      channel: this.id,\n    })\n  }\n\n  request = () => {\n    this.logger.debug('Requesting')\n\n    this.sendMessage({\n      type: 'CHANNEL_REQUEST',\n      channel: this.id,\n      service: this.service,\n      parameters: this.parameters,\n    })\n\n    this.processStatusRequested()\n  }\n\n  processPayloadMessage = (message: ChannelPayloadMessage) => {\n    for (const listener of this.messageListeners) {\n      listener(message)\n    }\n  }\n\n  processStatusOpened = () => {\n    this.logger.debug('Opened')\n\n    this.setStatus(DXLinkChannelState.OPENED)\n  }\n\n  processStatusRequested = () => {\n    this.setStatus(DXLinkChannelState.REQUESTED)\n  }\n\n  processStatusClosed = () => {\n    this.logger.debug('Closed by remote endpoint')\n\n    this.setStatus(DXLinkChannelState.CLOSED)\n    this.clear()\n  }\n\n  processError = (error: DXLinkError) => {\n    if (this.errorListeners.size === 0) {\n      this.logger.error(`Unhandled error in channel#${this.id}: `, error)\n      return\n    }\n\n    for (const listener of this.errorListeners) {\n      try {\n        listener(error)\n      } catch (e) {\n        this.logger.error(`Error in channel#${this.id} error listener: `, e)\n      }\n    }\n  }\n\n  private setStatus = (newStatus: DXLinkChannelState) => {\n    if (this.status === newStatus) return\n\n    const prev = this.status\n    this.status = newStatus\n    for (const listener of this.statusListeners) {\n      try {\n        listener(newStatus, prev)\n      } catch (e) {\n        this.logger.error(`Error in channel#${this.id} status listener: `, e)\n      }\n    }\n  }\n\n  private clear = () => {\n    this.messageListeners.clear()\n    this.statusListeners.clear()\n    // TODO: rethink approach when error came after channel is closed\n    // this.errorListeners.clear()\n  }\n}\n","import { type DXLinkWebSocketMessage } from './messages'\n\n/**\n * Interface for a WebSocket connector that manages the connection to a WebSocket server.\n * It provides methods to start and stop the connection, send messages, and set listeners for open, close, and message events.\n */\nexport interface DXLinkWebSocketConnector {\n  /**\n   * Returns the URL of the WebSocket connection.\n   */\n  getUrl(): string\n  /**\n   * Starts the WebSocket connection.\n   */\n  start(): void\n  /**\n   * Stops the WebSocket connection and cleans up resources.\n   */\n  stop(): void\n  /**\n   * Sends a message over the WebSocket connection.\n   * @param message The message to send.\n   */\n  sendMessage(message: DXLinkWebSocketMessage): void\n  /**\n   * Sets a listener that is called when the WebSocket connection is opened.\n   * @param listener The listener function to call when the connection is opened.\n   */\n  setOpenListener(listener: () => void): void\n  /**\n   * Sets a listener that is called when the WebSocket connection is closed.\n   * @param listener The listener function to call when the connection is closed.\n   */\n  setCloseListener(listener: DXLinkWebSocketCloseListener): void\n  /**\n   * Sets a listener that is called when a message is received from the WebSocket server.\n   * @param listener The listener function to call when a message is received.\n   */\n  setMessageListener(listener: (message: DXLinkWebSocketMessage) => void): void\n}\n\n/**\n * Type for a close listener that is called when the WebSocket connection is closed.\n * @param reason - The reason for the closure.\n * @param error - Indicates if the closure was due to an error.\n */\nexport type DXLinkWebSocketCloseListener = (reason: string, error: boolean) => void\n\n/**\n * Default connector for the WebSocket connection.\n * @internal\n */\nexport class DefaultDXLinkWebSocketConnector implements DXLinkWebSocketConnector {\n  private socket: WebSocket | undefined = undefined\n\n  private isAvailable = false\n\n  private openListener: (() => void) | undefined = undefined\n  private closeListener: DXLinkWebSocketCloseListener | undefined = undefined\n  private messageListener: ((message: DXLinkWebSocketMessage) => void) | undefined = undefined\n\n  constructor(\n    private readonly url: string,\n    private readonly protocols?: string | string[]\n  ) {}\n\n  start() {\n    if (this.socket !== undefined) return\n\n    this.socket = new WebSocket(this.url, this.protocols)\n\n    this.socket.addEventListener('open', this.handleOpen)\n    this.socket.addEventListener('error', this.handleError)\n    this.socket.addEventListener('close', this.handleClosed)\n  }\n\n  stop() {\n    if (this.socket === undefined) return\n\n    this.socket.removeEventListener('open', this.handleOpen)\n    this.socket.removeEventListener('error', this.handleError)\n    this.socket.removeEventListener('close', this.handleClosed)\n    this.socket.removeEventListener('message', this.handleMessage)\n\n    this.socket.close()\n    this.socket = undefined\n    this.isAvailable = false\n  }\n\n  sendMessage = (message: DXLinkWebSocketMessage) => {\n    if (this.socket === undefined || !this.isAvailable) {\n      return\n    }\n\n    this.socket.send(JSON.stringify(message))\n  }\n\n  setOpenListener = (listener: () => void) => {\n    this.openListener = listener\n  }\n\n  setCloseListener = (listener: DXLinkWebSocketCloseListener) => {\n    this.closeListener = listener\n  }\n\n  setMessageListener = (listener: (message: DXLinkWebSocketMessage) => void) => {\n    this.messageListener = listener\n  }\n\n  getUrl = () => this.url\n\n  private handleOpen = () => {\n    if (this.socket === undefined) return\n\n    this.isAvailable = true\n\n    this.socket.removeEventListener('open', this.handleOpen)\n\n    this.socket.addEventListener('message', this.handleMessage)\n    this.socket.addEventListener('close', this.handleClosed)\n\n    this.openListener?.()\n  }\n\n  private handleClosed = (ev: CloseEvent) => {\n    if (this.socket === undefined) return\n\n    this.stop()\n\n    this.closeListener?.(ev.reason, false)\n  }\n\n  private handleError = (_ev: Event) => {\n    if (this.socket === undefined) return\n\n    this.stop()\n\n    this.closeListener?.('Unable to connect', true)\n  }\n\n  private handleMessage = (ev: MessageEvent) => {\n    try {\n      const message = JSON.parse(ev.data)\n      if (typeof message !== 'object') {\n        throw new Error('Unexpected message: ' + typeof message)\n      }\n      if (typeof message.type !== 'string') {\n        throw new Error('Unexpected message type: ' + typeof message.type)\n      }\n      if (typeof message.channel !== 'number') {\n        throw new Error('Unexpected message channel: ' + typeof message.channel)\n      }\n\n      // TODO: validate message properly (e.g. check for type and other fields)\n\n      if (this.messageListener === undefined) {\n        return console.warn('No message listener set')\n      }\n\n      this.messageListener(message)\n    } catch (error) {\n      console.error(error instanceof Error ? error : new Error('Parsing error:' + String(error)))\n    }\n  }\n}\n","import {\n  DXLinkLogLevel,\n  type DXLinkLogger,\n  Logger,\n  Scheduler,\n  type DXLinkConnectionDetails,\n  DXLinkConnectionState,\n  type DXLinkConnectionStateChangeListener,\n  type DXLinkErrorListener,\n  DXLinkAuthState,\n  DXLinkChannelState,\n  type DXLinkAuthStateChangeListener,\n  type DXLinkChannel,\n  type DXLinkError,\n  type DXLinkClient,\n} from '@dxfeed/dxlink-core'\n\nimport { DXLinkWebSocketChannel } from './channel'\nimport type { DXLinkWebSocketClientConfig } from './config'\nimport { type DXLinkWebSocketConnector, DefaultDXLinkWebSocketConnector } from './connector'\nimport {\n  type AuthStateMessage,\n  type ErrorMessage,\n  type DXLinkWebSocketMessage,\n  type SetupMessage,\n  isChannelLifecycleMessage,\n  isChannelMessage,\n  isConnectionMessage,\n} from './messages'\nimport { VERSION } from './version'\n\n/**\n * Protocol version that is used by client.\n */\nexport const DXLINK_WS_PROTOCOL_VERSION = '0.1'\n\nconst CLIENT_VERSION = `DXF-JS/${VERSION}`\n\nconst DEFAULT_CONNECTION_DETAILS: DXLinkConnectionDetails = {\n  protocolVersion: DXLINK_WS_PROTOCOL_VERSION,\n  clientVersion: CLIENT_VERSION,\n}\n\n/**\n * dxLink WebSocket client that can be used to connect to the remote dxLink WebSocket endpoint and open channels to services.\n */\nexport class DXLinkWebSocketClient implements DXLinkClient {\n  private readonly config: DXLinkWebSocketClientConfig\n\n  private readonly logger: DXLinkLogger\n\n  private readonly scheduler = new Scheduler()\n\n  private connector: DXLinkWebSocketConnector | undefined\n\n  private connectionState: DXLinkConnectionState = DXLinkConnectionState.NOT_CONNECTED\n  private connectionDetails: DXLinkConnectionDetails = DEFAULT_CONNECTION_DETAILS\n\n  private authState: DXLinkAuthState = DXLinkAuthState.UNAUTHORIZED\n\n  // Listeners\n  private readonly connectionStateChangeListeners = new Set<DXLinkConnectionStateChangeListener>()\n  private readonly errorListeners = new Set<DXLinkErrorListener>()\n  private readonly authStateChangeListeners = new Set<DXLinkAuthStateChangeListener>()\n\n  /**\n   * Authorization type that was determined by server behavior during setup phase.\n   * This value is used to determine if authorization is required or optional or not defined yet.\n   */\n  private isFirstAuthState = true\n  /**\n   * Last setted auth token that will be sent to server after connection is established or re-established.\n   */\n  private lastSettedAuthToken: string | undefined\n\n  // Stats for keepalive\n  // TODO: mb move to connector\n  private lastReceivedMillis = 0\n  private lastSentMillis = 0\n\n  /**\n   * Count of reconnect attempts since last successful connection.\n   */\n  private reconnectAttempts = 0\n\n  // Channels\n  private globalChannelId = 1\n  private readonly channels = new Map<number, DXLinkWebSocketChannel>()\n\n  /**\n   * Create new instance of {@link DXLinkWebSocketClient}.\n   * @param config Configuration of the client.\n   */\n  constructor(config?: Partial<DXLinkWebSocketClientConfig>) {\n    this.config = {\n      keepaliveInterval: 30,\n      keepaliveTimeout: 60,\n      acceptKeepaliveTimeout: 60,\n      actionTimeout: 10,\n      logLevel: DXLinkLogLevel.WARN,\n      maxReconnectAttempts: -1,\n      connectorFactory: (url) => new DefaultDXLinkWebSocketConnector(url),\n      ...config,\n    }\n\n    this.logger = new Logger(this.constructor.name, this.config.logLevel)\n  }\n\n  connect = (url: string) => {\n    // Do nothing if already connected to the same url\n    if (this.connector?.getUrl() === url) return\n\n    // Disconnect from previous connection if any exists\n    this.disconnect()\n\n    this.logger.debug('Connecting to', url)\n\n    // Immediately set connection state to CONNECTING\n    this.setConnectionState(DXLinkConnectionState.CONNECTING)\n\n    // Create new connector\n    this.connector = this.config.connectorFactory(url)\n    this.connector.setOpenListener(this.processTransportOpen)\n    this.connector.setMessageListener(this.processMessage)\n    this.connector.setCloseListener(this.processTransportClose)\n\n    // Initiate websocket connection\n    this.connector.start()\n  }\n\n  reconnect = () => {\n    if (\n      this.config.maxReconnectAttempts >= 0 &&\n      this.reconnectAttempts >= this.config.maxReconnectAttempts\n    ) {\n      this.logger.warn('Max reconnect attempts reached')\n\n      this.disconnect()\n      return\n    }\n\n    if (\n      this.connectionState === DXLinkConnectionState.NOT_CONNECTED ||\n      this.connector === undefined\n    )\n      return\n\n    this.logger.debug('Trying to reconnect', this.connector.getUrl())\n\n    this.connector.stop()\n\n    // Clear all timeouts\n    this.scheduler.clear()\n\n    // Set initial state\n    this.connectionDetails = DEFAULT_CONNECTION_DETAILS\n    this.lastReceivedMillis = 0\n    this.lastSentMillis = 0\n    this.isFirstAuthState = true\n\n    // Increase reconnect attempts counter\n    this.reconnectAttempts++\n\n    // Update state for connection and channels\n    this.setConnectionState(DXLinkConnectionState.CONNECTING)\n    for (const channel of this.channels.values()) {\n      if (channel.getState() === DXLinkChannelState.CLOSED) continue\n\n      channel.processStatusRequested()\n    }\n\n    // Schedule reconnect attempt after some time\n    // Additionally, task will be executed in case when tab is active again\n    // coz browser sometimes doesn't run scheduled tasks when tab is inactive\n    this.scheduler.schedule(\n      () => {\n        if (this.connector === undefined) return\n\n        // Start new connection attempt\n        this.connector.start()\n      },\n      this.reconnectAttempts * 1000,\n      'RECONNECT'\n    )\n  }\n\n  disconnect = () => {\n    if (this.connectionState === DXLinkConnectionState.NOT_CONNECTED) return\n\n    this.logger.debug('Disconnecting')\n\n    // Destroy connector\n    this.connector?.stop()\n    this.connector = undefined\n\n    // Clear all timeouts\n    this.scheduler.clear()\n\n    // Set initial state\n    this.connectionDetails = DEFAULT_CONNECTION_DETAILS\n    this.lastReceivedMillis = 0\n    this.lastSentMillis = 0\n    this.isFirstAuthState = true\n    this.reconnectAttempts = 0\n\n    this.setConnectionState(DXLinkConnectionState.NOT_CONNECTED)\n    this.setAuthState(DXLinkAuthState.UNAUTHORIZED)\n  }\n\n  close = () => {\n    this.disconnect()\n  }\n\n  getConnectionDetails = () => this.connectionDetails\n  getConnectionState = () => this.connectionState\n  addConnectionStateChangeListener = (listener: DXLinkConnectionStateChangeListener) =>\n    this.connectionStateChangeListeners.add(listener)\n  removeConnectionStateChangeListener = (listener: DXLinkConnectionStateChangeListener) =>\n    this.connectionStateChangeListeners.delete(listener)\n\n  setAuthToken = (token: string): void => {\n    this.lastSettedAuthToken = token\n\n    if (this.connectionState === DXLinkConnectionState.CONNECTED) {\n      this.sendAuthMessage(token)\n    }\n  }\n\n  getAuthState = (): DXLinkAuthState => this.authState\n  addAuthStateChangeListener = (listener: DXLinkAuthStateChangeListener) =>\n    this.authStateChangeListeners.add(listener)\n  removeAuthStateChangeListener = (listener: DXLinkAuthStateChangeListener) =>\n    this.authStateChangeListeners.delete(listener)\n\n  addErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.add(listener)\n  removeErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.delete(listener)\n\n  openChannel = (service: string, parameters: Record<string, unknown>): DXLinkChannel => {\n    const channelId = this.globalChannelId\n    this.globalChannelId += 2\n\n    const channel = new DXLinkWebSocketChannel(\n      channelId,\n      service,\n      parameters,\n      this.sendMessage,\n      this.config\n    )\n\n    this.channels.set(channelId, channel)\n\n    // Send channel request if connection is already established\n    if (\n      this.connectionState === DXLinkConnectionState.CONNECTED &&\n      this.authState === DXLinkAuthState.AUTHORIZED\n    ) {\n      channel.request()\n    }\n\n    return channel\n  }\n\n  private setConnectionState = (newStatus: DXLinkConnectionState) => {\n    const prev = this.connectionState\n    if (prev === newStatus) return\n\n    this.connectionState = newStatus\n    for (const listener of this.connectionStateChangeListeners) {\n      listener(newStatus, prev)\n    }\n  }\n\n  private sendMessage = (message: DXLinkWebSocketMessage): void => {\n    this.connector?.sendMessage(message)\n\n    this.scheduleKeepalive()\n\n    // TODO: mb move to connector\n    this.lastSentMillis = Date.now()\n  }\n\n  private sendAuthMessage = (token: string): void => {\n    this.logger.debug('Sending auth message')\n\n    this.setAuthState(DXLinkAuthState.AUTHORIZING)\n\n    this.sendMessage({\n      type: 'AUTH',\n      channel: 0,\n      token,\n    })\n  }\n\n  private setAuthState = (newState: DXLinkAuthState): void => {\n    const prev = this.authState\n\n    this.authState = newState\n    for (const listener of this.authStateChangeListeners) {\n      try {\n        listener(newState, prev)\n      } catch (e) {\n        this.logger.error('Auth state listener error', e)\n      }\n    }\n  }\n\n  private processMessage = (message: DXLinkWebSocketMessage): void => {\n    this.lastReceivedMillis = Date.now()\n\n    // Send keepalive message if no messages sent for a while (keepaliveInterval)\n    // Because browser sometimes doesn't run scheduled tasks when tab is inactive\n    if (this.lastReceivedMillis - this.lastSentMillis >= this.config.keepaliveInterval * 1000) {\n      this.sendMessage({\n        type: 'KEEPALIVE',\n        channel: 0,\n      })\n    }\n\n    // Connection messages are messages that are sent to the channel 0\n    if (isConnectionMessage(message)) {\n      switch (message.type) {\n        case 'SETUP':\n          return this.processSetupMessage(message)\n        case 'AUTH_STATE':\n          return this.processAuthStateMessage(message)\n        case 'ERROR':\n          return this.publishError({\n            type: message.error,\n            message: message.message,\n          })\n        case 'KEEPALIVE':\n          // Ignore keepalive messages coz they are used only to maintain connection\n          return\n      }\n    } else if (isChannelMessage(message)) {\n      const channel = this.channels.get(message.channel)\n      if (channel === undefined) {\n        this.logger.warn('Received lifecycle message for unknown channel', message)\n        return\n      }\n\n      if (isChannelLifecycleMessage(message)) {\n        switch (message.type) {\n          case 'CHANNEL_OPENED':\n            return channel.processStatusOpened()\n          case 'CHANNEL_CLOSED':\n            return channel.processStatusClosed()\n          case 'ERROR':\n            return channel.processError({\n              type: message.error,\n              message: message.message,\n            })\n        }\n        return\n      }\n\n      return channel.processPayloadMessage(message)\n    }\n\n    this.logger.warn('Unhandeled message', message.type)\n  }\n\n  private processSetupMessage = (serverSetup: SetupMessage): void => {\n    // Clear setup timeout check from connect method\n    this.scheduler.cancel('SETUP_TIMEOUT')\n\n    // Mark connection as connected after first setup message and subsequent ones\n    if (\n      this.connectionState === DXLinkConnectionState.CONNECTING ||\n      this.connectionState === DXLinkConnectionState.CONNECTED\n    ) {\n      this.connectionDetails = {\n        ...this.connectionDetails,\n        serverVersion: serverSetup.version,\n        clientKeepaliveTimeout: this.config.keepaliveTimeout,\n        serverKeepaliveTimeout: serverSetup.keepaliveTimeout,\n      }\n\n      // Reset reconnect attempts counter after successful connection\n      this.reconnectAttempts = 0\n\n      if (this.lastSettedAuthToken === undefined) {\n        this.setConnectionState(DXLinkConnectionState.CONNECTED)\n      }\n    }\n\n    // Connection maintance: Setup keepalive timeout check\n    const timeoutMills = (serverSetup.keepaliveTimeout ?? 60) * 1000\n    this.scheduler.schedule(() => this.timeoutCheck(timeoutMills), timeoutMills, 'TIMEOUT')\n  }\n\n  private publishError = (error: DXLinkError): void => {\n    this.logger.debug('Publishing error', error)\n\n    if (this.errorListeners.size === 0) {\n      this.logger.error('Unhandled dxLink error', error)\n      return\n    }\n\n    for (const listener of this.errorListeners) {\n      try {\n        listener(error)\n      } catch (e) {\n        this.logger.error('Error listener error', e)\n      }\n    }\n  }\n\n  private processAuthStateMessage = ({ state }: AuthStateMessage): void => {\n    this.logger.debug('Received auth state message', state)\n\n    // Clear auth state timeout check\n    this.scheduler.cancel('AUTH_STATE_TIMEOUT')\n\n    // Ignore first auth state message because it is sent during connection setup\n    if (this.isFirstAuthState) {\n      this.isFirstAuthState = false\n    } else {\n      // Reset auth token if server rejected it\n      if (state === 'UNAUTHORIZED') {\n        this.lastSettedAuthToken = undefined\n      }\n    }\n\n    // Request active channels if connection is authorized\n    if (state === 'AUTHORIZED') {\n      this.setConnectionState(DXLinkConnectionState.CONNECTED)\n\n      this.requestActiveChannels()\n    }\n\n    this.setAuthState(DXLinkAuthState[state])\n  }\n\n  private requestActiveChannels = (): void => {\n    for (const channel of this.channels.values()) {\n      // clear closed channels\n      if (channel.getState() === DXLinkChannelState.CLOSED) {\n        this.channels.delete(channel.id)\n        continue\n      }\n\n      channel.request()\n    }\n  }\n\n  /**\n   * Process transport open event from connector.\n   * After transport is opened:\n   * - setup message is sent to server\n   * - auth message is sent to server if auth token is set\n   * - wait for setup message from server\n   * - wait for auth state message from server\n   */\n  private processTransportOpen = (): void => {\n    this.logger.debug('Connection opened')\n\n    const setupMessage: SetupMessage = {\n      type: 'SETUP',\n      channel: 0,\n      version: `${this.connectionDetails.protocolVersion}-${this.connectionDetails.clientVersion}`,\n      keepaliveTimeout: this.config.keepaliveTimeout,\n      acceptKeepaliveTimeout: this.config.acceptKeepaliveTimeout,\n    }\n\n    // Setup timeout check\n    this.scheduler.schedule(\n      () => {\n        const errorMessage: ErrorMessage = {\n          type: 'ERROR',\n          channel: 0,\n          error: 'TIMEOUT',\n          message: 'No setup message received for ' + this.config.actionTimeout + 's',\n        }\n\n        this.sendMessage(errorMessage)\n\n        this.publishError({\n          type: errorMessage.error,\n          message: `${errorMessage.message} from server`,\n        })\n\n        // Disconnect if no setup message received\n        this.reconnect()\n      },\n      this.config.actionTimeout * 1000,\n      'SETUP_TIMEOUT'\n    )\n\n    this.sendMessage(setupMessage)\n\n    this.scheduler.schedule(\n      () => {\n        const errorMessage: ErrorMessage = {\n          type: 'ERROR',\n          channel: 0,\n          error: 'TIMEOUT',\n          message: 'No auth state message received for ' + this.config.actionTimeout + 's',\n        }\n\n        this.sendMessage(errorMessage)\n\n        this.publishError({\n          type: errorMessage.error,\n          message: `${errorMessage.message} from server`,\n        })\n\n        // Disconnect if no auth state message received\n        this.reconnect()\n      },\n      this.config.actionTimeout * 1000,\n      'AUTH_STATE_TIMEOUT'\n    )\n\n    if (this.lastSettedAuthToken !== undefined) {\n      this.sendAuthMessage(this.lastSettedAuthToken)\n    }\n  }\n\n  /**\n   *  Process transport close event from connector.\n   *  After transport is closed by server:\n   * - reconnect if connection is authorized\n   * - disconnect if connection is not authorized\n   */\n  private processTransportClose = (reason: string, error: boolean): void => {\n    this.logger.debug('Connection closed', reason)\n\n    if (error !== undefined) {\n      this.publishError({\n        type: 'UNKNOWN',\n        message: reason,\n      })\n    }\n\n    if (this.authState === DXLinkAuthState.UNAUTHORIZED) {\n      this.lastSettedAuthToken = undefined\n      this.disconnect()\n      return\n    }\n\n    this.reconnect()\n  }\n\n  private timeoutCheck = (timeoutMills: number) => {\n    const now = Date.now()\n    const noKeepaliveDuration = now - this.lastReceivedMillis\n    if (noKeepaliveDuration >= timeoutMills) {\n      this.sendMessage({\n        type: 'ERROR',\n        channel: 0,\n        error: 'TIMEOUT',\n        message: 'No keepalive received for ' + noKeepaliveDuration + 'ms',\n      })\n\n      return this.reconnect()\n    }\n\n    const nextTimeout = Math.max(200, timeoutMills - noKeepaliveDuration)\n    this.scheduler.schedule(() => this.timeoutCheck(timeoutMills), nextTimeout, 'TIMEOUT')\n  }\n\n  private scheduleKeepalive = () => {\n    this.scheduler.schedule(\n      () => {\n        this.sendMessage({\n          type: 'KEEPALIVE',\n          channel: 0,\n        })\n\n        this.scheduleKeepalive()\n      },\n      this.config.keepaliveInterval * 1000,\n      'KEEPALIVE'\n    )\n  }\n}\n","export interface AuthMessage {\n  type: 'AUTH'\n  channel: 0\n  token: string\n}\n\nexport type AuthState = 'AUTHORIZED' | 'UNAUTHORIZED'\n\nexport interface AuthStateMessage {\n  type: 'AUTH_STATE'\n  channel: 0\n  state: AuthState\n}\n\nexport interface SetupMessage {\n  type: 'SETUP'\n  channel: 0\n  version: string\n  keepaliveTimeout?: number\n  acceptKeepaliveTimeout?: number\n}\n\nexport interface KeepaliveMessage {\n  type: 'KEEPALIVE'\n  channel: 0\n}\n\nexport interface ChannelRequestMessage {\n  type: 'CHANNEL_REQUEST'\n  channel: number\n  service: string\n  parameters?: Record<string, unknown>\n}\n\nexport interface ChannelCancelMessage {\n  type: 'CHANNEL_CANCEL'\n  channel: number\n}\n\nexport interface ChannelOpenedMessage {\n  type: 'CHANNEL_OPENED'\n  channel: number\n  service: string\n  parameters?: Record<string, unknown>\n}\n\nexport interface ChannelClosedMessage {\n  type: 'CHANNEL_CLOSED'\n  channel: number\n}\n\nexport type ErrorType =\n  | 'UNKNOWN'\n  | 'UNSUPPORTED_PROTOCOL'\n  | 'TIMEOUT'\n  | 'UNAUTHORIZED'\n  | 'INVALID_MESSAGE'\n  | 'BAD_ACTION'\n\nexport interface ErrorMessage {\n  type: 'ERROR'\n  channel: 0\n  error: ErrorType\n  message: string\n}\n\nexport interface ChannelErrorMessage {\n  type: 'ERROR'\n  channel: number\n  error: ErrorType\n  message: string\n}\n\nexport interface ChannelPayloadMessage {\n  type: string\n  channel: number\n  [key: string]: unknown\n}\n\nexport type ConnectionMessage =\n  | SetupMessage\n  | KeepaliveMessage\n  | AuthMessage\n  | AuthStateMessage\n  | ErrorMessage\n\nexport type DXLinkWebSocketMessage =\n  | SetupMessage\n  | KeepaliveMessage\n  | AuthMessage\n  | AuthStateMessage\n  | ErrorMessage\n  | ChannelRequestMessage\n  | ChannelCancelMessage\n  | ChannelOpenedMessage\n  | ChannelClosedMessage\n  | ChannelPayloadMessage\n  | ChannelErrorMessage\n\nexport const isConnectionMessage = (\n  message: DXLinkWebSocketMessage\n): message is ConnectionMessage =>\n  message.channel === 0 &&\n  (message.type === 'SETUP' ||\n    message.type === 'KEEPALIVE' ||\n    message.type === 'AUTH' ||\n    message.type === 'AUTH_STATE' ||\n    message.type === 'ERROR')\n\nexport type ChannelLifecycleMessage =\n  | ChannelOpenedMessage\n  | ChannelClosedMessage\n  | ChannelErrorMessage\n  | ChannelRequestMessage\n  | ChannelCancelMessage\n\nexport type ChannelMessage = ChannelLifecycleMessage | ChannelPayloadMessage\n\nexport const isChannelMessage = (message: DXLinkWebSocketMessage): message is ChannelMessage =>\n  message.channel !== 0\n\nexport const isChannelLifecycleMessage = (\n  message: ChannelMessage\n): message is ChannelLifecycleMessage =>\n  message.type === 'CHANNEL_OPENED' ||\n  message.type === 'CHANNEL_CLOSED' ||\n  message.type === 'ERROR' ||\n  message.type === 'CHANNEL_REQUEST' ||\n  message.type === 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build/index.module.js

@@ -1,2 +0,2 @@
-import{DXLinkChannelState,Logger,Scheduler,DXLinkConnectionState,DXLinkAuthState,DXLinkLogLevel}from"@dxfeed/dxlink-core";class DXLinkWebSocketChannel{constructor(id,service,parameters,sendMessage,config){this.id=void 0,this.service=void 0,this.parameters=void 0,this.sendMessage=void 0,this.status=DXLinkChannelState.REQUESTED,this.messageListeners=new Set,this.statusListeners=new Set,this.errorListeners=new Set,this.logger=void 0,this.send=({type:type,...payload})=>{if(this.status!==DXLinkChannelState.OPENED)throw new Error("Channel is not ready");this.sendMessage({type:type,channel:this.id,...payload})},this.addMessageListener=listener=>this.messageListeners.add(listener),this.removeMessageListener=listener=>this.messageListeners.delete(listener),this.getState=()=>this.status,this.addStateChangeListener=listener=>this.statusListeners.add(listener),this.removeStateChangeListener=listener=>this.statusListeners.delete(listener),this.addErrorListener=listener=>this.errorListeners.add(listener),this.removeErrorListener=listener=>this.errorListeners.delete(listener),this.error=({type:type,message:message})=>this.send({type:"ERROR",error:type,message:message}),this.close=()=>{this.status!==DXLinkChannelState.CLOSED&&(this.logger.debug("Closing by user"),this.setStatus(DXLinkChannelState.CLOSED),this.clear(),this.sendMessage({type:"CHANNEL_CANCEL",channel:this.id}))},this.request=()=>{this.logger.debug("Requesting"),this.sendMessage({type:"CHANNEL_REQUEST",channel:this.id,service:this.service,parameters:this.parameters}),this.processStatusRequested()},this.processPayloadMessage=message=>{for(const listener of this.messageListeners)listener(message)},this.processStatusOpened=()=>{this.logger.debug("Opened"),this.setStatus(DXLinkChannelState.OPENED)},this.processStatusRequested=()=>{this.setStatus(DXLinkChannelState.REQUESTED)},this.processStatusClosed=()=>{this.logger.debug("Closed by remote endpoint"),this.setStatus(DXLinkChannelState.CLOSED),this.clear()},this.processError=error=>{if(0!==this.errorListeners.size)for(const listener of this.errorListeners)try{listener(error)}catch(e){this.logger.error(`Error in channel#${this.id} error listener: `,e)}else this.logger.error(`Unhandled error in channel#${this.id}: `,error)},this.setStatus=newStatus=>{if(this.status===newStatus)return;const prev=this.status;this.status=newStatus;for(const listener of this.statusListeners)try{listener(newStatus,prev)}catch(e){this.logger.error(`Error in channel#${this.id} status listener: `,e)}},this.clear=()=>{this.messageListeners.clear(),this.statusListeners.clear()},this.id=id,this.service=service,this.parameters=parameters,this.sendMessage=sendMessage,this.logger=new Logger(`${DXLinkWebSocketChannel.name}#${id} ${service}`,config.logLevel)}}class WebSocketConnector{constructor(url){this.url=void 0,this.socket=void 0,this.isAvailable=!1,this.openListener=void 0,this.closeListener=void 0,this.messageListener=void 0,this.sendMessage=message=>{void 0!==this.socket&&this.isAvailable&&this.socket.send(JSON.stringify(message))},this.setOpenListener=listener=>{this.openListener=listener},this.setCloseListener=listener=>{this.closeListener=listener},this.setMessageListener=listener=>{this.messageListener=listener},this.getUrl=()=>this.url,this.handleOpen=()=>{void 0!==this.socket&&(this.isAvailable=!0,this.socket.removeEventListener("open",this.handleOpen),this.socket.addEventListener("message",this.handleMessage),this.socket.addEventListener("close",this.handleClosed),this.openListener?.())},this.handleClosed=ev=>{void 0!==this.socket&&(this.stop(),this.closeListener?.(ev.reason,!1))},this.handleError=_ev=>{void 0!==this.socket&&(this.stop(),this.closeListener?.("Unable to connect",!0))},this.handleMessage=ev=>{try{const message=JSON.parse(ev.data);if("object"!=typeof message)throw new Error("Unexpected message: "+typeof message);if("string"!=typeof message.type)throw new Error("Unexpected message type: "+typeof message.type);if("number"!=typeof message.channel)throw new Error("Unexpected message channel: "+typeof message.channel);if(void 0===this.messageListener)return console.warn("No message listener set");this.messageListener(message)}catch(error){console.error(error instanceof Error?error:new Error("Parsing error:"+String(error)))}},this.url=url}start(){void 0===this.socket&&(this.socket=new WebSocket(this.url),this.socket.addEventListener("open",this.handleOpen),this.socket.addEventListener("error",this.handleError),this.socket.addEventListener("close",this.handleClosed))}stop(){void 0!==this.socket&&(this.socket.removeEventListener("open",this.handleOpen),this.socket.removeEventListener("error",this.handleError),this.socket.removeEventListener("close",this.handleClosed),this.socket.removeEventListener("message",this.handleMessage),this.socket.close(),this.socket=void 0,this.isAvailable=!1)}}const DXLINK_WS_PROTOCOL_VERSION="0.1",DEFAULT_CONNECTION_DETAILS={protocolVersion:"0.1",clientVersion:"DXF-JS/0.3.0"};class DXLinkWebSocketClient{constructor(config){this.config=void 0,this.logger=void 0,this.scheduler=new Scheduler,this.connector=void 0,this.connectionState=DXLinkConnectionState.NOT_CONNECTED,this.connectionDetails=DEFAULT_CONNECTION_DETAILS,this.authState=DXLinkAuthState.UNAUTHORIZED,this.connectionStateChangeListeners=new Set,this.errorListeners=new Set,this.authStateChangeListeners=new Set,this.isFirstAuthState=!0,this.lastSettedAuthToken=void 0,this.lastReceivedMillis=0,this.lastSentMillis=0,this.reconnectAttempts=0,this.globalChannelId=1,this.channels=new Map,this.connect=url=>{this.connector?.getUrl()!==url&&(this.disconnect(),this.logger.debug("Connecting to",url),this.setConnectionState(DXLinkConnectionState.CONNECTING),this.connector=new WebSocketConnector(url),this.connector.setOpenListener(this.processTransportOpen),this.connector.setMessageListener(this.processMessage),this.connector.setCloseListener(this.processTransportClose),this.connector.start())},this.reconnect=()=>{if(this.config.maxReconnectAttempts>0&&this.reconnectAttempts>=this.config.maxReconnectAttempts)return this.logger.warn("Max reconnect attempts reached"),void this.disconnect();if(this.connectionState!==DXLinkConnectionState.NOT_CONNECTED&&void 0!==this.connector){this.logger.debug("Trying to reconnect",this.connector.getUrl()),this.connector.stop(),this.scheduler.clear(),this.connectionDetails=DEFAULT_CONNECTION_DETAILS,this.lastReceivedMillis=0,this.lastSentMillis=0,this.isFirstAuthState=!0,this.reconnectAttempts++,this.setConnectionState(DXLinkConnectionState.CONNECTING);for(const channel of this.channels.values())channel.getState()!==DXLinkChannelState.CLOSED&&channel.processStatusRequested();this.scheduler.schedule(()=>{void 0!==this.connector&&this.connector.start()},1e3*this.reconnectAttempts,"RECONNECT")}},this.disconnect=()=>{this.connectionState!==DXLinkConnectionState.NOT_CONNECTED&&(this.logger.debug("Disconnecting"),this.connector?.stop(),this.connector=void 0,this.scheduler.clear(),this.connectionDetails=DEFAULT_CONNECTION_DETAILS,this.lastReceivedMillis=0,this.lastSentMillis=0,this.isFirstAuthState=!0,this.reconnectAttempts=0,this.setConnectionState(DXLinkConnectionState.NOT_CONNECTED),this.setAuthState(DXLinkAuthState.UNAUTHORIZED))},this.close=()=>{this.disconnect()},this.getConnectionDetails=()=>this.connectionDetails,this.getConnectionState=()=>this.connectionState,this.addConnectionStateChangeListener=listener=>this.connectionStateChangeListeners.add(listener),this.removeConnectionStateChangeListener=listener=>this.connectionStateChangeListeners.delete(listener),this.setAuthToken=token=>{this.lastSettedAuthToken=token,this.connectionState===DXLinkConnectionState.CONNECTED&&this.sendAuthMessage(token)},this.getAuthState=()=>this.authState,this.addAuthStateChangeListener=listener=>this.authStateChangeListeners.add(listener),this.removeAuthStateChangeListener=listener=>this.authStateChangeListeners.delete(listener),this.addErrorListener=listener=>this.errorListeners.add(listener),this.removeErrorListener=listener=>this.errorListeners.delete(listener),this.openChannel=(service,parameters)=>{const channelId=this.globalChannelId;this.globalChannelId+=2;const channel=new DXLinkWebSocketChannel(channelId,service,parameters,this.sendMessage,this.config);return this.channels.set(channelId,channel),this.connectionState===DXLinkConnectionState.CONNECTED&&this.authState===DXLinkAuthState.AUTHORIZED&&channel.request(),channel},this.setConnectionState=newStatus=>{const prev=this.connectionState;if(prev!==newStatus){this.connectionState=newStatus;for(const listener of this.connectionStateChangeListeners)listener(newStatus,prev)}},this.sendMessage=message=>{this.connector?.sendMessage(message),this.scheduleKeepalive(),this.lastSentMillis=Date.now()},this.sendAuthMessage=token=>{this.logger.debug("Sending auth message"),this.setAuthState(DXLinkAuthState.AUTHORIZING),this.sendMessage({type:"AUTH",channel:0,token:token})},this.setAuthState=newState=>{const prev=this.authState;this.authState=newState;for(const listener of this.authStateChangeListeners)try{listener(newState,prev)}catch(e){this.logger.error("Auth state listener error",e)}},this.processMessage=message=>{if(this.lastReceivedMillis=Date.now(),this.lastReceivedMillis-this.lastSentMillis>=1e3*this.config.keepaliveInterval&&this.sendMessage({type:"KEEPALIVE",channel:0}),(message=>0===message.channel&&("SETUP"===message.type||"KEEPALIVE"===message.type||"AUTH"===message.type||"AUTH_STATE"===message.type||"ERROR"===message.type))(message))switch(message.type){case"SETUP":return this.processSetupMessage(message);case"AUTH_STATE":return this.processAuthStateMessage(message);case"ERROR":return this.publishError({type:message.error,message:message.message});case"KEEPALIVE":return}else if((message=>0!==message.channel)(message)){const channel=this.channels.get(message.channel);if(void 0===channel)return void this.logger.warn("Received lifecycle message for unknown channel",message);if((message=>"CHANNEL_OPENED"===message.type||"CHANNEL_CLOSED"===message.type||"ERROR"===message.type||"CHANNEL_REQUEST"===message.type||"CHANNEL_CANCEL"===message.type)(message)){switch(message.type){case"CHANNEL_OPENED":return channel.processStatusOpened();case"CHANNEL_CLOSED":return channel.processStatusClosed();case"ERROR":return channel.processError({type:message.error,message:message.message})}return}return channel.processPayloadMessage(message)}this.logger.warn("Unhandeled message",message.type)},this.processSetupMessage=serverSetup=>{this.scheduler.cancel("SETUP_TIMEOUT"),this.connectionState!==DXLinkConnectionState.CONNECTING&&this.connectionState!==DXLinkConnectionState.CONNECTED||(this.connectionDetails={...this.connectionDetails,serverVersion:serverSetup.version,clientKeepaliveTimeout:this.config.keepaliveTimeout,serverKeepaliveTimeout:serverSetup.keepaliveTimeout},this.reconnectAttempts=0,void 0===this.lastSettedAuthToken&&this.setConnectionState(DXLinkConnectionState.CONNECTED));const timeoutMills=1e3*(serverSetup.keepaliveTimeout??60);this.scheduler.schedule(()=>this.timeoutCheck(timeoutMills),timeoutMills,"TIMEOUT")},this.publishError=error=>{if(this.logger.debug("Publishing error",error),0!==this.errorListeners.size)for(const listener of this.errorListeners)try{listener(error)}catch(e){this.logger.error("Error listener error",e)}else this.logger.error("Unhandled dxLink error",error)},this.processAuthStateMessage=({state:state})=>{this.logger.debug("Received auth state message",state),this.scheduler.cancel("AUTH_STATE_TIMEOUT"),this.isFirstAuthState?this.isFirstAuthState=!1:"UNAUTHORIZED"===state&&(this.lastSettedAuthToken=void 0),"AUTHORIZED"===state&&(this.setConnectionState(DXLinkConnectionState.CONNECTED),this.requestActiveChannels()),this.setAuthState(DXLinkAuthState[state])},this.requestActiveChannels=()=>{for(const channel of this.channels.values())channel.getState()!==DXLinkChannelState.CLOSED?channel.request():this.channels.delete(channel.id)},this.processTransportOpen=()=>{this.logger.debug("Connection opened");const setupMessage={type:"SETUP",channel:0,version:`${this.connectionDetails.protocolVersion}-${this.connectionDetails.clientVersion}`,keepaliveTimeout:this.config.keepaliveTimeout,acceptKeepaliveTimeout:this.config.acceptKeepaliveTimeout};this.scheduler.schedule(()=>{const errorMessage={type:"ERROR",channel:0,error:"TIMEOUT",message:"No setup message received for "+this.config.actionTimeout+"s"};this.sendMessage(errorMessage),this.publishError({type:errorMessage.error,message:`${errorMessage.message} from server`}),this.reconnect()},1e3*this.config.actionTimeout,"SETUP_TIMEOUT"),this.sendMessage(setupMessage),this.scheduler.schedule(()=>{const errorMessage={type:"ERROR",channel:0,error:"TIMEOUT",message:"No auth state message received for "+this.config.actionTimeout+"s"};this.sendMessage(errorMessage),this.publishError({type:errorMessage.error,message:`${errorMessage.message} from server`}),this.reconnect()},1e3*this.config.actionTimeout,"AUTH_STATE_TIMEOUT"),void 0!==this.lastSettedAuthToken&&this.sendAuthMessage(this.lastSettedAuthToken)},this.processTransportClose=(reason,error)=>{if(this.logger.debug("Connection closed",reason),void 0!==error&&this.publishError({type:"UNKNOWN",message:reason}),this.authState===DXLinkAuthState.UNAUTHORIZED)return this.lastSettedAuthToken=void 0,void this.disconnect();this.reconnect()},this.timeoutCheck=timeoutMills=>{const noKeepaliveDuration=Date.now()-this.lastReceivedMillis;if(noKeepaliveDuration>=timeoutMills)return this.sendMessage({type:"ERROR",channel:0,error:"TIMEOUT",message:"No keepalive received for "+noKeepaliveDuration+"ms"}),this.reconnect();const nextTimeout=Math.max(200,timeoutMills-noKeepaliveDuration);this.scheduler.schedule(()=>this.timeoutCheck(timeoutMills),nextTimeout,"TIMEOUT")},this.scheduleKeepalive=()=>{this.scheduler.schedule(()=>{this.sendMessage({type:"KEEPALIVE",channel:0}),this.scheduleKeepalive()},1e3*this.config.keepaliveInterval,"KEEPALIVE")},this.config={keepaliveInterval:30,keepaliveTimeout:60,acceptKeepaliveTimeout:60,actionTimeout:10,logLevel:DXLinkLogLevel.WARN,maxReconnectAttempts:-1,...config},this.logger=new Logger(this.constructor.name,this.config.logLevel)}}export{DXLINK_WS_PROTOCOL_VERSION,DXLinkWebSocketClient};
+import{DXLinkChannelState,Logger,Scheduler,DXLinkConnectionState,DXLinkAuthState,DXLinkLogLevel}from"@dxfeed/dxlink-core";class DXLinkWebSocketChannel{constructor(id,service,parameters,sendMessage,config){this.id=void 0,this.service=void 0,this.parameters=void 0,this.sendMessage=void 0,this.status=DXLinkChannelState.REQUESTED,this.messageListeners=new Set,this.statusListeners=new Set,this.errorListeners=new Set,this.logger=void 0,this.send=({type:type,...payload})=>{if(this.status!==DXLinkChannelState.OPENED)throw new Error("Channel is not ready");this.sendMessage({type:type,channel:this.id,...payload})},this.addMessageListener=listener=>this.messageListeners.add(listener),this.removeMessageListener=listener=>this.messageListeners.delete(listener),this.getState=()=>this.status,this.addStateChangeListener=listener=>this.statusListeners.add(listener),this.removeStateChangeListener=listener=>this.statusListeners.delete(listener),this.addErrorListener=listener=>this.errorListeners.add(listener),this.removeErrorListener=listener=>this.errorListeners.delete(listener),this.error=({type:type,message:message})=>this.send({type:"ERROR",error:type,message:message}),this.close=()=>{this.status!==DXLinkChannelState.CLOSED&&(this.logger.debug("Closing by user"),this.setStatus(DXLinkChannelState.CLOSED),this.clear(),this.sendMessage({type:"CHANNEL_CANCEL",channel:this.id}))},this.request=()=>{this.logger.debug("Requesting"),this.sendMessage({type:"CHANNEL_REQUEST",channel:this.id,service:this.service,parameters:this.parameters}),this.processStatusRequested()},this.processPayloadMessage=message=>{for(const listener of this.messageListeners)listener(message)},this.processStatusOpened=()=>{this.logger.debug("Opened"),this.setStatus(DXLinkChannelState.OPENED)},this.processStatusRequested=()=>{this.setStatus(DXLinkChannelState.REQUESTED)},this.processStatusClosed=()=>{this.logger.debug("Closed by remote endpoint"),this.setStatus(DXLinkChannelState.CLOSED),this.clear()},this.processError=error=>{if(0!==this.errorListeners.size)for(const listener of this.errorListeners)try{listener(error)}catch(e){this.logger.error(`Error in channel#${this.id} error listener: `,e)}else this.logger.error(`Unhandled error in channel#${this.id}: `,error)},this.setStatus=newStatus=>{if(this.status===newStatus)return;const prev=this.status;this.status=newStatus;for(const listener of this.statusListeners)try{listener(newStatus,prev)}catch(e){this.logger.error(`Error in channel#${this.id} status listener: `,e)}},this.clear=()=>{this.messageListeners.clear(),this.statusListeners.clear()},this.id=id,this.service=service,this.parameters=parameters,this.sendMessage=sendMessage,this.logger=new Logger(`${DXLinkWebSocketChannel.name}#${id} ${service}`,config.logLevel)}}class DefaultDXLinkWebSocketConnector{constructor(url,protocols){this.url=void 0,this.protocols=void 0,this.socket=void 0,this.isAvailable=!1,this.openListener=void 0,this.closeListener=void 0,this.messageListener=void 0,this.sendMessage=message=>{void 0!==this.socket&&this.isAvailable&&this.socket.send(JSON.stringify(message))},this.setOpenListener=listener=>{this.openListener=listener},this.setCloseListener=listener=>{this.closeListener=listener},this.setMessageListener=listener=>{this.messageListener=listener},this.getUrl=()=>this.url,this.handleOpen=()=>{void 0!==this.socket&&(this.isAvailable=!0,this.socket.removeEventListener("open",this.handleOpen),this.socket.addEventListener("message",this.handleMessage),this.socket.addEventListener("close",this.handleClosed),this.openListener?.())},this.handleClosed=ev=>{void 0!==this.socket&&(this.stop(),this.closeListener?.(ev.reason,!1))},this.handleError=_ev=>{void 0!==this.socket&&(this.stop(),this.closeListener?.("Unable to connect",!0))},this.handleMessage=ev=>{try{const message=JSON.parse(ev.data);if("object"!=typeof message)throw new Error("Unexpected message: "+typeof message);if("string"!=typeof message.type)throw new Error("Unexpected message type: "+typeof message.type);if("number"!=typeof message.channel)throw new Error("Unexpected message channel: "+typeof message.channel);if(void 0===this.messageListener)return console.warn("No message listener set");this.messageListener(message)}catch(error){console.error(error instanceof Error?error:new Error("Parsing error:"+String(error)))}},this.url=url,this.protocols=protocols}start(){void 0===this.socket&&(this.socket=new WebSocket(this.url,this.protocols),this.socket.addEventListener("open",this.handleOpen),this.socket.addEventListener("error",this.handleError),this.socket.addEventListener("close",this.handleClosed))}stop(){void 0!==this.socket&&(this.socket.removeEventListener("open",this.handleOpen),this.socket.removeEventListener("error",this.handleError),this.socket.removeEventListener("close",this.handleClosed),this.socket.removeEventListener("message",this.handleMessage),this.socket.close(),this.socket=void 0,this.isAvailable=!1)}}const DXLINK_WS_PROTOCOL_VERSION="0.1",DEFAULT_CONNECTION_DETAILS={protocolVersion:"0.1",clientVersion:"DXF-JS/0.4.0"};class DXLinkWebSocketClient{constructor(config){this.config=void 0,this.logger=void 0,this.scheduler=new Scheduler,this.connector=void 0,this.connectionState=DXLinkConnectionState.NOT_CONNECTED,this.connectionDetails=DEFAULT_CONNECTION_DETAILS,this.authState=DXLinkAuthState.UNAUTHORIZED,this.connectionStateChangeListeners=new Set,this.errorListeners=new Set,this.authStateChangeListeners=new Set,this.isFirstAuthState=!0,this.lastSettedAuthToken=void 0,this.lastReceivedMillis=0,this.lastSentMillis=0,this.reconnectAttempts=0,this.globalChannelId=1,this.channels=new Map,this.connect=url=>{this.connector?.getUrl()!==url&&(this.disconnect(),this.logger.debug("Connecting to",url),this.setConnectionState(DXLinkConnectionState.CONNECTING),this.connector=this.config.connectorFactory(url),this.connector.setOpenListener(this.processTransportOpen),this.connector.setMessageListener(this.processMessage),this.connector.setCloseListener(this.processTransportClose),this.connector.start())},this.reconnect=()=>{if(this.config.maxReconnectAttempts>=0&&this.reconnectAttempts>=this.config.maxReconnectAttempts)return this.logger.warn("Max reconnect attempts reached"),void this.disconnect();if(this.connectionState!==DXLinkConnectionState.NOT_CONNECTED&&void 0!==this.connector){this.logger.debug("Trying to reconnect",this.connector.getUrl()),this.connector.stop(),this.scheduler.clear(),this.connectionDetails=DEFAULT_CONNECTION_DETAILS,this.lastReceivedMillis=0,this.lastSentMillis=0,this.isFirstAuthState=!0,this.reconnectAttempts++,this.setConnectionState(DXLinkConnectionState.CONNECTING);for(const channel of this.channels.values())channel.getState()!==DXLinkChannelState.CLOSED&&channel.processStatusRequested();this.scheduler.schedule(()=>{void 0!==this.connector&&this.connector.start()},1e3*this.reconnectAttempts,"RECONNECT")}},this.disconnect=()=>{this.connectionState!==DXLinkConnectionState.NOT_CONNECTED&&(this.logger.debug("Disconnecting"),this.connector?.stop(),this.connector=void 0,this.scheduler.clear(),this.connectionDetails=DEFAULT_CONNECTION_DETAILS,this.lastReceivedMillis=0,this.lastSentMillis=0,this.isFirstAuthState=!0,this.reconnectAttempts=0,this.setConnectionState(DXLinkConnectionState.NOT_CONNECTED),this.setAuthState(DXLinkAuthState.UNAUTHORIZED))},this.close=()=>{this.disconnect()},this.getConnectionDetails=()=>this.connectionDetails,this.getConnectionState=()=>this.connectionState,this.addConnectionStateChangeListener=listener=>this.connectionStateChangeListeners.add(listener),this.removeConnectionStateChangeListener=listener=>this.connectionStateChangeListeners.delete(listener),this.setAuthToken=token=>{this.lastSettedAuthToken=token,this.connectionState===DXLinkConnectionState.CONNECTED&&this.sendAuthMessage(token)},this.getAuthState=()=>this.authState,this.addAuthStateChangeListener=listener=>this.authStateChangeListeners.add(listener),this.removeAuthStateChangeListener=listener=>this.authStateChangeListeners.delete(listener),this.addErrorListener=listener=>this.errorListeners.add(listener),this.removeErrorListener=listener=>this.errorListeners.delete(listener),this.openChannel=(service,parameters)=>{const channelId=this.globalChannelId;this.globalChannelId+=2;const channel=new DXLinkWebSocketChannel(channelId,service,parameters,this.sendMessage,this.config);return this.channels.set(channelId,channel),this.connectionState===DXLinkConnectionState.CONNECTED&&this.authState===DXLinkAuthState.AUTHORIZED&&channel.request(),channel},this.setConnectionState=newStatus=>{const prev=this.connectionState;if(prev!==newStatus){this.connectionState=newStatus;for(const listener of this.connectionStateChangeListeners)listener(newStatus,prev)}},this.sendMessage=message=>{this.connector?.sendMessage(message),this.scheduleKeepalive(),this.lastSentMillis=Date.now()},this.sendAuthMessage=token=>{this.logger.debug("Sending auth message"),this.setAuthState(DXLinkAuthState.AUTHORIZING),this.sendMessage({type:"AUTH",channel:0,token:token})},this.setAuthState=newState=>{const prev=this.authState;this.authState=newState;for(const listener of this.authStateChangeListeners)try{listener(newState,prev)}catch(e){this.logger.error("Auth state listener error",e)}},this.processMessage=message=>{if(this.lastReceivedMillis=Date.now(),this.lastReceivedMillis-this.lastSentMillis>=1e3*this.config.keepaliveInterval&&this.sendMessage({type:"KEEPALIVE",channel:0}),(message=>0===message.channel&&("SETUP"===message.type||"KEEPALIVE"===message.type||"AUTH"===message.type||"AUTH_STATE"===message.type||"ERROR"===message.type))(message))switch(message.type){case"SETUP":return this.processSetupMessage(message);case"AUTH_STATE":return this.processAuthStateMessage(message);case"ERROR":return this.publishError({type:message.error,message:message.message});case"KEEPALIVE":return}else if((message=>0!==message.channel)(message)){const channel=this.channels.get(message.channel);if(void 0===channel)return void this.logger.warn("Received lifecycle message for unknown channel",message);if((message=>"CHANNEL_OPENED"===message.type||"CHANNEL_CLOSED"===message.type||"ERROR"===message.type||"CHANNEL_REQUEST"===message.type||"CHANNEL_CANCEL"===message.type)(message)){switch(message.type){case"CHANNEL_OPENED":return channel.processStatusOpened();case"CHANNEL_CLOSED":return channel.processStatusClosed();case"ERROR":return channel.processError({type:message.error,message:message.message})}return}return channel.processPayloadMessage(message)}this.logger.warn("Unhandeled message",message.type)},this.processSetupMessage=serverSetup=>{this.scheduler.cancel("SETUP_TIMEOUT"),this.connectionState!==DXLinkConnectionState.CONNECTING&&this.connectionState!==DXLinkConnectionState.CONNECTED||(this.connectionDetails={...this.connectionDetails,serverVersion:serverSetup.version,clientKeepaliveTimeout:this.config.keepaliveTimeout,serverKeepaliveTimeout:serverSetup.keepaliveTimeout},this.reconnectAttempts=0,void 0===this.lastSettedAuthToken&&this.setConnectionState(DXLinkConnectionState.CONNECTED));const timeoutMills=1e3*(serverSetup.keepaliveTimeout??60);this.scheduler.schedule(()=>this.timeoutCheck(timeoutMills),timeoutMills,"TIMEOUT")},this.publishError=error=>{if(this.logger.debug("Publishing error",error),0!==this.errorListeners.size)for(const listener of this.errorListeners)try{listener(error)}catch(e){this.logger.error("Error listener error",e)}else this.logger.error("Unhandled dxLink error",error)},this.processAuthStateMessage=({state:state})=>{this.logger.debug("Received auth state message",state),this.scheduler.cancel("AUTH_STATE_TIMEOUT"),this.isFirstAuthState?this.isFirstAuthState=!1:"UNAUTHORIZED"===state&&(this.lastSettedAuthToken=void 0),"AUTHORIZED"===state&&(this.setConnectionState(DXLinkConnectionState.CONNECTED),this.requestActiveChannels()),this.setAuthState(DXLinkAuthState[state])},this.requestActiveChannels=()=>{for(const channel of this.channels.values())channel.getState()!==DXLinkChannelState.CLOSED?channel.request():this.channels.delete(channel.id)},this.processTransportOpen=()=>{this.logger.debug("Connection opened");const setupMessage={type:"SETUP",channel:0,version:`${this.connectionDetails.protocolVersion}-${this.connectionDetails.clientVersion}`,keepaliveTimeout:this.config.keepaliveTimeout,acceptKeepaliveTimeout:this.config.acceptKeepaliveTimeout};this.scheduler.schedule(()=>{const errorMessage={type:"ERROR",channel:0,error:"TIMEOUT",message:"No setup message received for "+this.config.actionTimeout+"s"};this.sendMessage(errorMessage),this.publishError({type:errorMessage.error,message:`${errorMessage.message} from server`}),this.reconnect()},1e3*this.config.actionTimeout,"SETUP_TIMEOUT"),this.sendMessage(setupMessage),this.scheduler.schedule(()=>{const errorMessage={type:"ERROR",channel:0,error:"TIMEOUT",message:"No auth state message received for "+this.config.actionTimeout+"s"};this.sendMessage(errorMessage),this.publishError({type:errorMessage.error,message:`${errorMessage.message} from server`}),this.reconnect()},1e3*this.config.actionTimeout,"AUTH_STATE_TIMEOUT"),void 0!==this.lastSettedAuthToken&&this.sendAuthMessage(this.lastSettedAuthToken)},this.processTransportClose=(reason,error)=>{if(this.logger.debug("Connection closed",reason),void 0!==error&&this.publishError({type:"UNKNOWN",message:reason}),this.authState===DXLinkAuthState.UNAUTHORIZED)return this.lastSettedAuthToken=void 0,void this.disconnect();this.reconnect()},this.timeoutCheck=timeoutMills=>{const noKeepaliveDuration=Date.now()-this.lastReceivedMillis;if(noKeepaliveDuration>=timeoutMills)return this.sendMessage({type:"ERROR",channel:0,error:"TIMEOUT",message:"No keepalive received for "+noKeepaliveDuration+"ms"}),this.reconnect();const nextTimeout=Math.max(200,timeoutMills-noKeepaliveDuration);this.scheduler.schedule(()=>this.timeoutCheck(timeoutMills),nextTimeout,"TIMEOUT")},this.scheduleKeepalive=()=>{this.scheduler.schedule(()=>{this.sendMessage({type:"KEEPALIVE",channel:0}),this.scheduleKeepalive()},1e3*this.config.keepaliveInterval,"KEEPALIVE")},this.config={keepaliveInterval:30,keepaliveTimeout:60,acceptKeepaliveTimeout:60,actionTimeout:10,logLevel:DXLinkLogLevel.WARN,maxReconnectAttempts:-1,connectorFactory:url=>new DefaultDXLinkWebSocketConnector(url),...config},this.logger=new Logger(this.constructor.name,this.config.logLevel)}}export{DXLINK_WS_PROTOCOL_VERSION,DXLinkWebSocketClient,DefaultDXLinkWebSocketConnector};
 //# sourceMappingURL=index.module.js.map

build/index.module.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"index.module.js","sources":["../src/channel.ts","../src/connector.ts","../src/client.ts","../src/messages.ts"],"sourcesContent":["import {\n  type DXLinkLogger,\n  Logger,\n  type DXLinkChannel,\n  DXLinkChannelState,\n  type DXLinkChannelMessageListener,\n  type DXLinkChannelStateChangeListener,\n  type DXLinkErrorListener,\n  type DXLinkChannelMessage,\n  type DXLinkError,\n} from '@dxfeed/dxlink-core'\n\nimport { type DXLinkWebSocketClientConfig } from './config'\nimport { type ChannelPayloadMessage, type Message } from './messages'\n\n/**\n * A DXLink channel implementation.\n * @internal\n */\nexport class DXLinkWebSocketChannel implements DXLinkChannel {\n  private status = DXLinkChannelState.REQUESTED\n\n  // Listeners\n  private readonly messageListeners = new Set<DXLinkChannelMessageListener>()\n  private readonly statusListeners = new Set<DXLinkChannelStateChangeListener>()\n  private readonly errorListeners = new Set<DXLinkErrorListener>()\n\n  private logger: DXLinkLogger\n\n  constructor(\n    public readonly id: number,\n    public readonly service: string,\n    public readonly parameters: Record<string, unknown>,\n    private readonly sendMessage: (message: Message) => void,\n    config: DXLinkWebSocketClientConfig\n  ) {\n    this.logger = new Logger(`${DXLinkWebSocketChannel.name}#${id} ${service}`, config.logLevel)\n  }\n\n  send = ({ type, ...payload }: DXLinkChannelMessage) => {\n    if (this.status !== DXLinkChannelState.OPENED) {\n      throw new Error('Channel is not ready')\n    }\n\n    this.sendMessage({\n      type,\n      channel: this.id,\n      ...payload,\n    })\n  }\n\n  addMessageListener = (listener: DXLinkChannelMessageListener) =>\n    this.messageListeners.add(listener)\n  removeMessageListener = (listener: DXLinkChannelMessageListener) =>\n    this.messageListeners.delete(listener)\n\n  getState = () => this.status\n  addStateChangeListener = (listener: DXLinkChannelStateChangeListener) =>\n    this.statusListeners.add(listener)\n  removeStateChangeListener = (listener: DXLinkChannelStateChangeListener) =>\n    this.statusListeners.delete(listener)\n\n  addErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.add(listener)\n  removeErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.delete(listener)\n\n  error = ({ type, message }: DXLinkError) =>\n    this.send({\n      type: 'ERROR',\n      error: type,\n      message,\n    })\n\n  close = () => {\n    if (this.status === DXLinkChannelState.CLOSED) return\n\n    this.logger.debug(`Closing by user`)\n\n    // We can think that channel is closed already\n    this.setStatus(DXLinkChannelState.CLOSED)\n\n    this.clear()\n\n    this.sendMessage({\n      type: 'CHANNEL_CANCEL',\n      channel: this.id,\n    })\n  }\n\n  request = () => {\n    this.logger.debug('Requesting')\n\n    this.sendMessage({\n      type: 'CHANNEL_REQUEST',\n      channel: this.id,\n      service: this.service,\n      parameters: this.parameters,\n    })\n\n    this.processStatusRequested()\n  }\n\n  processPayloadMessage = (message: ChannelPayloadMessage) => {\n    for (const listener of this.messageListeners) {\n      listener(message)\n    }\n  }\n\n  processStatusOpened = () => {\n    this.logger.debug('Opened')\n\n    this.setStatus(DXLinkChannelState.OPENED)\n  }\n\n  processStatusRequested = () => {\n    this.setStatus(DXLinkChannelState.REQUESTED)\n  }\n\n  processStatusClosed = () => {\n    this.logger.debug('Closed by remote endpoint')\n\n    this.setStatus(DXLinkChannelState.CLOSED)\n    this.clear()\n  }\n\n  processError = (error: DXLinkError) => {\n    if (this.errorListeners.size === 0) {\n      this.logger.error(`Unhandled error in channel#${this.id}: `, error)\n      return\n    }\n\n    for (const listener of this.errorListeners) {\n      try {\n        listener(error)\n      } catch (e) {\n        this.logger.error(`Error in channel#${this.id} error listener: `, e)\n      }\n    }\n  }\n\n  private setStatus = (newStatus: DXLinkChannelState) => {\n    if (this.status === newStatus) return\n\n    const prev = this.status\n    this.status = newStatus\n    for (const listener of this.statusListeners) {\n      try {\n        listener(newStatus, prev)\n      } catch (e) {\n        this.logger.error(`Error in channel#${this.id} status listener: `, e)\n      }\n    }\n  }\n\n  private clear = () => {\n    this.messageListeners.clear()\n    this.statusListeners.clear()\n    // TODO: rethink approach when error came after channel is closed\n    // this.errorListeners.clear()\n  }\n}\n","import { type Message } from './messages'\n\ntype CloseListener = (reason: string, error: boolean) => void\n\n/**\n * Connector for the WebSocket connection.\n * @internal\n */\nexport class WebSocketConnector {\n  private socket: WebSocket | undefined = undefined\n\n  private isAvailable = false\n\n  private openListener: (() => void) | undefined = undefined\n  private closeListener: CloseListener | undefined = undefined\n  private messageListener: ((message: Message) => void) | undefined = undefined\n\n  constructor(private readonly url: string) {}\n\n  start() {\n    if (this.socket !== undefined) return\n\n    this.socket = new WebSocket(this.url)\n\n    this.socket.addEventListener('open', this.handleOpen)\n    this.socket.addEventListener('error', this.handleError)\n    this.socket.addEventListener('close', this.handleClosed)\n  }\n\n  stop() {\n    if (this.socket === undefined) return\n\n    this.socket.removeEventListener('open', this.handleOpen)\n    this.socket.removeEventListener('error', this.handleError)\n    this.socket.removeEventListener('close', this.handleClosed)\n    this.socket.removeEventListener('message', this.handleMessage)\n\n    this.socket.close()\n    this.socket = undefined\n    this.isAvailable = false\n  }\n\n  sendMessage = (message: Message) => {\n    if (this.socket === undefined || !this.isAvailable) {\n      return\n    }\n\n    this.socket.send(JSON.stringify(message))\n  }\n\n  setOpenListener = (listener: () => void) => {\n    this.openListener = listener\n  }\n\n  setCloseListener = (listener: CloseListener) => {\n    this.closeListener = listener\n  }\n\n  setMessageListener = (listener: (message: Message) => void) => {\n    this.messageListener = listener\n  }\n\n  getUrl = () => this.url\n\n  private handleOpen = () => {\n    if (this.socket === undefined) return\n\n    this.isAvailable = true\n\n    this.socket.removeEventListener('open', this.handleOpen)\n\n    this.socket.addEventListener('message', this.handleMessage)\n    this.socket.addEventListener('close', this.handleClosed)\n\n    this.openListener?.()\n  }\n\n  private handleClosed = (ev: CloseEvent) => {\n    if (this.socket === undefined) return\n\n    this.stop()\n\n    this.closeListener?.(ev.reason, false)\n  }\n\n  private handleError = (_ev: Event) => {\n    if (this.socket === undefined) return\n\n    this.stop()\n\n    this.closeListener?.('Unable to connect', true)\n  }\n\n  private handleMessage = (ev: MessageEvent) => {\n    try {\n      const message = JSON.parse(ev.data)\n      if (typeof message !== 'object') {\n        throw new Error('Unexpected message: ' + typeof message)\n      }\n      if (typeof message.type !== 'string') {\n        throw new Error('Unexpected message type: ' + typeof message.type)\n      }\n      if (typeof message.channel !== 'number') {\n        throw new Error('Unexpected message channel: ' + typeof message.channel)\n      }\n\n      // TODO: validate message properly (e.g. check for type and other fields)\n\n      if (this.messageListener === undefined) {\n        return console.warn('No message listener set')\n      }\n\n      this.messageListener(message)\n    } catch (error) {\n      console.error(error instanceof Error ? error : new Error('Parsing error:' + String(error)))\n    }\n  }\n}\n","import {\n  DXLinkLogLevel,\n  type DXLinkLogger,\n  Logger,\n  Scheduler,\n  type DXLinkConnectionDetails,\n  DXLinkConnectionState,\n  type DXLinkConnectionStateChangeListener,\n  type DXLinkErrorListener,\n  DXLinkAuthState,\n  DXLinkChannelState,\n  type DXLinkAuthStateChangeListener,\n  type DXLinkChannel,\n  type DXLinkError,\n  type DXLinkClient,\n} from '@dxfeed/dxlink-core'\n\nimport { DXLinkWebSocketChannel } from './channel'\nimport type { DXLinkWebSocketClientConfig } from './config'\nimport { WebSocketConnector } from './connector'\nimport {\n  type AuthStateMessage,\n  type ErrorMessage,\n  type Message,\n  type SetupMessage,\n  isChannelLifecycleMessage,\n  isChannelMessage,\n  isConnectionMessage,\n} from './messages'\nimport { VERSION } from './version'\n\n/**\n * Protocol version that is used by client.\n */\nexport const DXLINK_WS_PROTOCOL_VERSION = '0.1'\n\nconst CLIENT_VERSION = `DXF-JS/${VERSION}`\n\nconst DEFAULT_CONNECTION_DETAILS: DXLinkConnectionDetails = {\n  protocolVersion: DXLINK_WS_PROTOCOL_VERSION,\n  clientVersion: CLIENT_VERSION,\n}\n\n/**\n * dxLink WebSocket client that can be used to connect to the remote dxLink WebSocket endpoint and open channels to services.\n */\nexport class DXLinkWebSocketClient implements DXLinkClient {\n  private readonly config: DXLinkWebSocketClientConfig\n\n  private readonly logger: DXLinkLogger\n\n  private readonly scheduler = new Scheduler()\n\n  private connector: WebSocketConnector | undefined\n\n  private connectionState: DXLinkConnectionState = DXLinkConnectionState.NOT_CONNECTED\n  private connectionDetails: DXLinkConnectionDetails = DEFAULT_CONNECTION_DETAILS\n\n  private authState: DXLinkAuthState = DXLinkAuthState.UNAUTHORIZED\n\n  // Listeners\n  private readonly connectionStateChangeListeners = new Set<DXLinkConnectionStateChangeListener>()\n  private readonly errorListeners = new Set<DXLinkErrorListener>()\n  private readonly authStateChangeListeners = new Set<DXLinkAuthStateChangeListener>()\n\n  /**\n   * Authorization type that was determined by server behavior during setup phase.\n   * This value is used to determine if authorization is required or optional or not defined yet.\n   */\n  private isFirstAuthState = true\n  /**\n   * Last setted auth token that will be sent to server after connection is established or re-established.\n   */\n  private lastSettedAuthToken: string | undefined\n\n  // Stats for keepalive\n  // TODO: mb move to connector\n  private lastReceivedMillis = 0\n  private lastSentMillis = 0\n\n  /**\n   * Count of reconnect attempts since last successful connection.\n   */\n  private reconnectAttempts = 0\n\n  // Channels\n  private globalChannelId = 1\n  private readonly channels = new Map<number, DXLinkWebSocketChannel>()\n\n  /**\n   * Create new instance of {@link DXLinkWebSocketClient}.\n   * @param config Configuration of the client.\n   */\n  constructor(config?: Partial<DXLinkWebSocketClientConfig>) {\n    this.config = {\n      keepaliveInterval: 30,\n      keepaliveTimeout: 60,\n      acceptKeepaliveTimeout: 60,\n      actionTimeout: 10,\n      logLevel: DXLinkLogLevel.WARN,\n      maxReconnectAttempts: -1,\n      ...config,\n    }\n\n    this.logger = new Logger(this.constructor.name, this.config.logLevel)\n  }\n\n  connect = (url: string) => {\n    // Do nothing if already connected to the same url\n    if (this.connector?.getUrl() === url) return\n\n    // Disconnect from previous connection if any exists\n    this.disconnect()\n\n    this.logger.debug('Connecting to', url)\n\n    // Immediately set connection state to CONNECTING\n    this.setConnectionState(DXLinkConnectionState.CONNECTING)\n\n    this.connector = new WebSocketConnector(url)\n    this.connector.setOpenListener(this.processTransportOpen)\n    this.connector.setMessageListener(this.processMessage)\n    this.connector.setCloseListener(this.processTransportClose)\n\n    // Initiate websocket connection\n    this.connector.start()\n  }\n\n  reconnect = () => {\n    if (\n      this.config.maxReconnectAttempts > 0 &&\n      this.reconnectAttempts >= this.config.maxReconnectAttempts\n    ) {\n      this.logger.warn('Max reconnect attempts reached')\n\n      this.disconnect()\n      return\n    }\n\n    if (\n      this.connectionState === DXLinkConnectionState.NOT_CONNECTED ||\n      this.connector === undefined\n    )\n      return\n\n    this.logger.debug('Trying to reconnect', this.connector.getUrl())\n\n    this.connector.stop()\n\n    // Clear all timeouts\n    this.scheduler.clear()\n\n    // Set initial state\n    this.connectionDetails = DEFAULT_CONNECTION_DETAILS\n    this.lastReceivedMillis = 0\n    this.lastSentMillis = 0\n    this.isFirstAuthState = true\n\n    // Increase reconnect attempts counter\n    this.reconnectAttempts++\n\n    // Update state for connection and channels\n    this.setConnectionState(DXLinkConnectionState.CONNECTING)\n    for (const channel of this.channels.values()) {\n      if (channel.getState() === DXLinkChannelState.CLOSED) continue\n\n      channel.processStatusRequested()\n    }\n\n    // Schedule reconnect attempt after some time\n    // Additionally, task will be executed in case when tab is active again\n    // coz browser sometimes doesn't run scheduled tasks when tab is inactive\n    this.scheduler.schedule(\n      () => {\n        if (this.connector === undefined) return\n\n        // Start new connection attempt\n        this.connector.start()\n      },\n      this.reconnectAttempts * 1000,\n      'RECONNECT'\n    )\n  }\n\n  disconnect = () => {\n    if (this.connectionState === DXLinkConnectionState.NOT_CONNECTED) return\n\n    this.logger.debug('Disconnecting')\n\n    // Destroy connector\n    this.connector?.stop()\n    this.connector = undefined\n\n    // Clear all timeouts\n    this.scheduler.clear()\n\n    // Set initial state\n    this.connectionDetails = DEFAULT_CONNECTION_DETAILS\n    this.lastReceivedMillis = 0\n    this.lastSentMillis = 0\n    this.isFirstAuthState = true\n    this.reconnectAttempts = 0\n\n    this.setConnectionState(DXLinkConnectionState.NOT_CONNECTED)\n    this.setAuthState(DXLinkAuthState.UNAUTHORIZED)\n  }\n\n  close = () => {\n    this.disconnect()\n  }\n\n  getConnectionDetails = () => this.connectionDetails\n  getConnectionState = () => this.connectionState\n  addConnectionStateChangeListener = (listener: DXLinkConnectionStateChangeListener) =>\n    this.connectionStateChangeListeners.add(listener)\n  removeConnectionStateChangeListener = (listener: DXLinkConnectionStateChangeListener) =>\n    this.connectionStateChangeListeners.delete(listener)\n\n  setAuthToken = (token: string): void => {\n    this.lastSettedAuthToken = token\n\n    if (this.connectionState === DXLinkConnectionState.CONNECTED) {\n      this.sendAuthMessage(token)\n    }\n  }\n\n  getAuthState = (): DXLinkAuthState => this.authState\n  addAuthStateChangeListener = (listener: DXLinkAuthStateChangeListener) =>\n    this.authStateChangeListeners.add(listener)\n  removeAuthStateChangeListener = (listener: DXLinkAuthStateChangeListener) =>\n    this.authStateChangeListeners.delete(listener)\n\n  addErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.add(listener)\n  removeErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.delete(listener)\n\n  openChannel = (service: string, parameters: Record<string, unknown>): DXLinkChannel => {\n    const channelId = this.globalChannelId\n    this.globalChannelId += 2\n\n    const channel = new DXLinkWebSocketChannel(\n      channelId,\n      service,\n      parameters,\n      this.sendMessage,\n      this.config\n    )\n\n    this.channels.set(channelId, channel)\n\n    // Send channel request if connection is already established\n    if (\n      this.connectionState === DXLinkConnectionState.CONNECTED &&\n      this.authState === DXLinkAuthState.AUTHORIZED\n    ) {\n      channel.request()\n    }\n\n    return channel\n  }\n\n  private setConnectionState = (newStatus: DXLinkConnectionState) => {\n    const prev = this.connectionState\n    if (prev === newStatus) return\n\n    this.connectionState = newStatus\n    for (const listener of this.connectionStateChangeListeners) {\n      listener(newStatus, prev)\n    }\n  }\n\n  private sendMessage = (message: Message): void => {\n    this.connector?.sendMessage(message)\n\n    this.scheduleKeepalive()\n\n    // TODO: mb move to connector\n    this.lastSentMillis = Date.now()\n  }\n\n  private sendAuthMessage = (token: string): void => {\n    this.logger.debug('Sending auth message')\n\n    this.setAuthState(DXLinkAuthState.AUTHORIZING)\n\n    this.sendMessage({\n      type: 'AUTH',\n      channel: 0,\n      token,\n    })\n  }\n\n  private setAuthState = (newState: DXLinkAuthState): void => {\n    const prev = this.authState\n\n    this.authState = newState\n    for (const listener of this.authStateChangeListeners) {\n      try {\n        listener(newState, prev)\n      } catch (e) {\n        this.logger.error('Auth state listener error', e)\n      }\n    }\n  }\n\n  private processMessage = (message: Message): void => {\n    this.lastReceivedMillis = Date.now()\n\n    // Send keepalive message if no messages sent for a while (keepaliveInterval)\n    // Because browser sometimes doesn't run scheduled tasks when tab is inactive\n    if (this.lastReceivedMillis - this.lastSentMillis >= this.config.keepaliveInterval * 1000) {\n      this.sendMessage({\n        type: 'KEEPALIVE',\n        channel: 0,\n      })\n    }\n\n    // Connection messages are messages that are sent to the channel 0\n    if (isConnectionMessage(message)) {\n      switch (message.type) {\n        case 'SETUP':\n          return this.processSetupMessage(message)\n        case 'AUTH_STATE':\n          return this.processAuthStateMessage(message)\n        case 'ERROR':\n          return this.publishError({\n            type: message.error,\n            message: message.message,\n          })\n        case 'KEEPALIVE':\n          // Ignore keepalive messages coz they are used only to maintain connection\n          return\n      }\n    } else if (isChannelMessage(message)) {\n      const channel = this.channels.get(message.channel)\n      if (channel === undefined) {\n        this.logger.warn('Received lifecycle message for unknown channel', message)\n        return\n      }\n\n      if (isChannelLifecycleMessage(message)) {\n        switch (message.type) {\n          case 'CHANNEL_OPENED':\n            return channel.processStatusOpened()\n          case 'CHANNEL_CLOSED':\n            return channel.processStatusClosed()\n          case 'ERROR':\n            return channel.processError({\n              type: message.error,\n              message: message.message,\n            })\n        }\n        return\n      }\n\n      return channel.processPayloadMessage(message)\n    }\n\n    this.logger.warn('Unhandeled message', message.type)\n  }\n\n  private processSetupMessage = (serverSetup: SetupMessage): void => {\n    // Clear setup timeout check from connect method\n    this.scheduler.cancel('SETUP_TIMEOUT')\n\n    // Mark connection as connected after first setup message and subsequent ones\n    if (\n      this.connectionState === DXLinkConnectionState.CONNECTING ||\n      this.connectionState === DXLinkConnectionState.CONNECTED\n    ) {\n      this.connectionDetails = {\n        ...this.connectionDetails,\n        serverVersion: serverSetup.version,\n        clientKeepaliveTimeout: this.config.keepaliveTimeout,\n        serverKeepaliveTimeout: serverSetup.keepaliveTimeout,\n      }\n\n      // Reset reconnect attempts counter after successful connection\n      this.reconnectAttempts = 0\n\n      if (this.lastSettedAuthToken === undefined) {\n        this.setConnectionState(DXLinkConnectionState.CONNECTED)\n      }\n    }\n\n    // Connection maintance: Setup keepalive timeout check\n    const timeoutMills = (serverSetup.keepaliveTimeout ?? 60) * 1000\n    this.scheduler.schedule(() => this.timeoutCheck(timeoutMills), timeoutMills, 'TIMEOUT')\n  }\n\n  private publishError = (error: DXLinkError): void => {\n    this.logger.debug('Publishing error', error)\n\n    if (this.errorListeners.size === 0) {\n      this.logger.error('Unhandled dxLink error', error)\n      return\n    }\n\n    for (const listener of this.errorListeners) {\n      try {\n        listener(error)\n      } catch (e) {\n        this.logger.error('Error listener error', e)\n      }\n    }\n  }\n\n  private processAuthStateMessage = ({ state }: AuthStateMessage): void => {\n    this.logger.debug('Received auth state message', state)\n\n    // Clear auth state timeout check\n    this.scheduler.cancel('AUTH_STATE_TIMEOUT')\n\n    // Ignore first auth state message because it is sent during connection setup\n    if (this.isFirstAuthState) {\n      this.isFirstAuthState = false\n    } else {\n      // Reset auth token if server rejected it\n      if (state === 'UNAUTHORIZED') {\n        this.lastSettedAuthToken = undefined\n      }\n    }\n\n    // Request active channels if connection is authorized\n    if (state === 'AUTHORIZED') {\n      this.setConnectionState(DXLinkConnectionState.CONNECTED)\n\n      this.requestActiveChannels()\n    }\n\n    this.setAuthState(DXLinkAuthState[state])\n  }\n\n  private requestActiveChannels = (): void => {\n    for (const channel of this.channels.values()) {\n      // clear closed channels\n      if (channel.getState() === DXLinkChannelState.CLOSED) {\n        this.channels.delete(channel.id)\n        continue\n      }\n\n      channel.request()\n    }\n  }\n\n  /**\n   * Process transport open event from connector.\n   * After transport is opened:\n   * - setup message is sent to server\n   * - auth message is sent to server if auth token is set\n   * - wait for setup message from server\n   * - wait for auth state message from server\n   */\n  private processTransportOpen = (): void => {\n    this.logger.debug('Connection opened')\n\n    const setupMessage: SetupMessage = {\n      type: 'SETUP',\n      channel: 0,\n      version: `${this.connectionDetails.protocolVersion}-${this.connectionDetails.clientVersion}`,\n      keepaliveTimeout: this.config.keepaliveTimeout,\n      acceptKeepaliveTimeout: this.config.acceptKeepaliveTimeout,\n    }\n\n    // Setup timeout check\n    this.scheduler.schedule(\n      () => {\n        const errorMessage: ErrorMessage = {\n          type: 'ERROR',\n          channel: 0,\n          error: 'TIMEOUT',\n          message: 'No setup message received for ' + this.config.actionTimeout + 's',\n        }\n\n        this.sendMessage(errorMessage)\n\n        this.publishError({\n          type: errorMessage.error,\n          message: `${errorMessage.message} from server`,\n        })\n\n        // Disconnect if no setup message received\n        this.reconnect()\n      },\n      this.config.actionTimeout * 1000,\n      'SETUP_TIMEOUT'\n    )\n\n    this.sendMessage(setupMessage)\n\n    this.scheduler.schedule(\n      () => {\n        const errorMessage: ErrorMessage = {\n          type: 'ERROR',\n          channel: 0,\n          error: 'TIMEOUT',\n          message: 'No auth state message received for ' + this.config.actionTimeout + 's',\n        }\n\n        this.sendMessage(errorMessage)\n\n        this.publishError({\n          type: errorMessage.error,\n          message: `${errorMessage.message} from server`,\n        })\n\n        // Disconnect if no auth state message received\n        this.reconnect()\n      },\n      this.config.actionTimeout * 1000,\n      'AUTH_STATE_TIMEOUT'\n    )\n\n    if (this.lastSettedAuthToken !== undefined) {\n      this.sendAuthMessage(this.lastSettedAuthToken)\n    }\n  }\n\n  /**\n   *  Process transport close event from connector.\n   *  After transport is closed by server:\n   * - reconnect if connection is authorized\n   * - disconnect if connection is not authorized\n   */\n  private processTransportClose = (reason: string, error: boolean): void => {\n    this.logger.debug('Connection closed', reason)\n\n    if (error !== undefined) {\n      this.publishError({\n        type: 'UNKNOWN',\n        message: reason,\n      })\n    }\n\n    if (this.authState === DXLinkAuthState.UNAUTHORIZED) {\n      this.lastSettedAuthToken = undefined\n      this.disconnect()\n      return\n    }\n\n    this.reconnect()\n  }\n\n  private timeoutCheck = (timeoutMills: number) => {\n    const now = Date.now()\n    const noKeepaliveDuration = now - this.lastReceivedMillis\n    if (noKeepaliveDuration >= timeoutMills) {\n      this.sendMessage({\n        type: 'ERROR',\n        channel: 0,\n        error: 'TIMEOUT',\n        message: 'No keepalive received for ' + noKeepaliveDuration + 'ms',\n      })\n\n      return this.reconnect()\n    }\n\n    const nextTimeout = Math.max(200, timeoutMills - noKeepaliveDuration)\n    this.scheduler.schedule(() => this.timeoutCheck(timeoutMills), nextTimeout, 'TIMEOUT')\n  }\n\n  private scheduleKeepalive = () => {\n    this.scheduler.schedule(\n      () => {\n        this.sendMessage({\n          type: 'KEEPALIVE',\n          channel: 0,\n        })\n\n        this.scheduleKeepalive()\n      },\n      this.config.keepaliveInterval * 1000,\n      'KEEPALIVE'\n    )\n  }\n}\n","export interface AuthMessage {\n  type: 'AUTH'\n  channel: 0\n  token: string\n}\n\nexport type AuthState = 'AUTHORIZED' | 'UNAUTHORIZED'\n\nexport interface AuthStateMessage {\n  type: 'AUTH_STATE'\n  channel: 0\n  state: AuthState\n}\n\nexport interface SetupMessage {\n  type: 'SETUP'\n  channel: 0\n  version: string\n  keepaliveTimeout?: number\n  acceptKeepaliveTimeout?: number\n}\n\nexport interface KeepaliveMessage {\n  type: 'KEEPALIVE'\n  channel: 0\n}\n\nexport interface ChannelRequestMessage {\n  type: 'CHANNEL_REQUEST'\n  channel: number\n  service: string\n  parameters?: Record<string, unknown>\n}\n\nexport interface ChannelCancelMessage {\n  type: 'CHANNEL_CANCEL'\n  channel: number\n}\n\nexport interface ChannelOpenedMessage {\n  type: 'CHANNEL_OPENED'\n  channel: number\n  service: string\n  parameters?: Record<string, unknown>\n}\n\nexport interface ChannelClosedMessage {\n  type: 'CHANNEL_CLOSED'\n  channel: number\n}\n\nexport type ErrorType =\n  | 'UNKNOWN'\n  | 'UNSUPPORTED_PROTOCOL'\n  | 'TIMEOUT'\n  | 'UNAUTHORIZED'\n  | 'INVALID_MESSAGE'\n  | 'BAD_ACTION'\n\nexport interface ErrorMessage {\n  type: 'ERROR'\n  channel: 0\n  error: ErrorType\n  message: string\n}\n\nexport interface ChannelErrorMessage {\n  type: 'ERROR'\n  channel: number\n  error: ErrorType\n  message: string\n}\n\nexport interface ChannelPayloadMessage {\n  type: string\n  channel: number\n  [key: string]: unknown\n}\n\nexport type ConnectionMessage =\n  | SetupMessage\n  | KeepaliveMessage\n  | AuthMessage\n  | AuthStateMessage\n  | ErrorMessage\n\nexport type Message =\n  | SetupMessage\n  | KeepaliveMessage\n  | AuthMessage\n  | AuthStateMessage\n  | ErrorMessage\n  | ChannelRequestMessage\n  | ChannelCancelMessage\n  | ChannelOpenedMessage\n  | ChannelClosedMessage\n  | ChannelPayloadMessage\n  | ChannelErrorMessage\n\nexport const isConnectionMessage = (message: Message): message is ConnectionMessage =>\n  message.channel === 0 &&\n  (message.type === 'SETUP' ||\n    message.type === 'KEEPALIVE' ||\n    message.type === 'AUTH' ||\n    message.type === 'AUTH_STATE' ||\n    message.type === 'ERROR')\n\nexport type ChannelLifecycleMessage =\n  | ChannelOpenedMessage\n  | ChannelClosedMessage\n  | ChannelErrorMessage\n  | ChannelRequestMessage\n  | ChannelCancelMessage\n\nexport type ChannelMessage = ChannelLifecycleMessage | ChannelPayloadMessage\n\nexport const isChannelMessage = (message: Message): message is ChannelMessage =>\n  message.channel !== 0\n\nexport const isChannelLifecycleMessage = (\n  message: ChannelMessage\n): message is ChannelLifecycleMessage =>\n  message.type === 'CHANNEL_OPENED' ||\n  message.type === 'CHANNEL_CLOSED' ||\n  message.type === 'ERROR' ||\n  message.type === 'CHANNEL_REQUEST' ||\n  message.type === 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+{"version":3,"file":"index.module.js","sources":["../src/channel.ts","../src/connector.ts","../src/client.ts","../src/messages.ts"],"sourcesContent":["import {\n  type DXLinkLogger,\n  Logger,\n  type DXLinkChannel,\n  DXLinkChannelState,\n  type DXLinkChannelMessageListener,\n  type DXLinkChannelStateChangeListener,\n  type DXLinkErrorListener,\n  type DXLinkChannelMessage,\n  type DXLinkError,\n} from '@dxfeed/dxlink-core'\n\nimport { type DXLinkWebSocketClientConfig } from './config'\nimport { type ChannelPayloadMessage, type DXLinkWebSocketMessage } from './messages'\n\n/**\n * A DXLink channel implementation.\n * @internal\n */\nexport class DXLinkWebSocketChannel implements DXLinkChannel {\n  private status = DXLinkChannelState.REQUESTED\n\n  // Listeners\n  private readonly messageListeners = new Set<DXLinkChannelMessageListener>()\n  private readonly statusListeners = new Set<DXLinkChannelStateChangeListener>()\n  private readonly errorListeners = new Set<DXLinkErrorListener>()\n\n  private logger: DXLinkLogger\n\n  constructor(\n    public readonly id: number,\n    public readonly service: string,\n    public readonly parameters: Record<string, unknown>,\n    private readonly sendMessage: (message: DXLinkWebSocketMessage) => void,\n    config: DXLinkWebSocketClientConfig\n  ) {\n    this.logger = new Logger(`${DXLinkWebSocketChannel.name}#${id} ${service}`, config.logLevel)\n  }\n\n  send = ({ type, ...payload }: DXLinkChannelMessage) => {\n    if (this.status !== DXLinkChannelState.OPENED) {\n      throw new Error('Channel is not ready')\n    }\n\n    this.sendMessage({\n      type,\n      channel: this.id,\n      ...payload,\n    })\n  }\n\n  addMessageListener = (listener: DXLinkChannelMessageListener) =>\n    this.messageListeners.add(listener)\n  removeMessageListener = (listener: DXLinkChannelMessageListener) =>\n    this.messageListeners.delete(listener)\n\n  getState = () => this.status\n  addStateChangeListener = (listener: DXLinkChannelStateChangeListener) =>\n    this.statusListeners.add(listener)\n  removeStateChangeListener = (listener: DXLinkChannelStateChangeListener) =>\n    this.statusListeners.delete(listener)\n\n  addErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.add(listener)\n  removeErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.delete(listener)\n\n  error = ({ type, message }: DXLinkError) =>\n    this.send({\n      type: 'ERROR',\n      error: type,\n      message,\n    })\n\n  close = () => {\n    if (this.status === DXLinkChannelState.CLOSED) return\n\n    this.logger.debug(`Closing by user`)\n\n    // We can think that channel is closed already\n    this.setStatus(DXLinkChannelState.CLOSED)\n\n    this.clear()\n\n    this.sendMessage({\n      type: 'CHANNEL_CANCEL',\n      channel: this.id,\n    })\n  }\n\n  request = () => {\n    this.logger.debug('Requesting')\n\n    this.sendMessage({\n      type: 'CHANNEL_REQUEST',\n      channel: this.id,\n      service: this.service,\n      parameters: this.parameters,\n    })\n\n    this.processStatusRequested()\n  }\n\n  processPayloadMessage = (message: ChannelPayloadMessage) => {\n    for (const listener of this.messageListeners) {\n      listener(message)\n    }\n  }\n\n  processStatusOpened = () => {\n    this.logger.debug('Opened')\n\n    this.setStatus(DXLinkChannelState.OPENED)\n  }\n\n  processStatusRequested = () => {\n    this.setStatus(DXLinkChannelState.REQUESTED)\n  }\n\n  processStatusClosed = () => {\n    this.logger.debug('Closed by remote endpoint')\n\n    this.setStatus(DXLinkChannelState.CLOSED)\n    this.clear()\n  }\n\n  processError = (error: DXLinkError) => {\n    if (this.errorListeners.size === 0) {\n      this.logger.error(`Unhandled error in channel#${this.id}: `, error)\n      return\n    }\n\n    for (const listener of this.errorListeners) {\n      try {\n        listener(error)\n      } catch (e) {\n        this.logger.error(`Error in channel#${this.id} error listener: `, e)\n      }\n    }\n  }\n\n  private setStatus = (newStatus: DXLinkChannelState) => {\n    if (this.status === newStatus) return\n\n    const prev = this.status\n    this.status = newStatus\n    for (const listener of this.statusListeners) {\n      try {\n        listener(newStatus, prev)\n      } catch (e) {\n        this.logger.error(`Error in channel#${this.id} status listener: `, e)\n      }\n    }\n  }\n\n  private clear = () => {\n    this.messageListeners.clear()\n    this.statusListeners.clear()\n    // TODO: rethink approach when error came after channel is closed\n    // this.errorListeners.clear()\n  }\n}\n","import { type DXLinkWebSocketMessage } from './messages'\n\n/**\n * Interface for a WebSocket connector that manages the connection to a WebSocket server.\n * It provides methods to start and stop the connection, send messages, and set listeners for open, close, and message events.\n */\nexport interface DXLinkWebSocketConnector {\n  /**\n   * Returns the URL of the WebSocket connection.\n   */\n  getUrl(): string\n  /**\n   * Starts the WebSocket connection.\n   */\n  start(): void\n  /**\n   * Stops the WebSocket connection and cleans up resources.\n   */\n  stop(): void\n  /**\n   * Sends a message over the WebSocket connection.\n   * @param message The message to send.\n   */\n  sendMessage(message: DXLinkWebSocketMessage): void\n  /**\n   * Sets a listener that is called when the WebSocket connection is opened.\n   * @param listener The listener function to call when the connection is opened.\n   */\n  setOpenListener(listener: () => void): void\n  /**\n   * Sets a listener that is called when the WebSocket connection is closed.\n   * @param listener The listener function to call when the connection is closed.\n   */\n  setCloseListener(listener: DXLinkWebSocketCloseListener): void\n  /**\n   * Sets a listener that is called when a message is received from the WebSocket server.\n   * @param listener The listener function to call when a message is received.\n   */\n  setMessageListener(listener: (message: DXLinkWebSocketMessage) => void): void\n}\n\n/**\n * Type for a close listener that is called when the WebSocket connection is closed.\n * @param reason - The reason for the closure.\n * @param error - Indicates if the closure was due to an error.\n */\nexport type DXLinkWebSocketCloseListener = (reason: string, error: boolean) => void\n\n/**\n * Default connector for the WebSocket connection.\n * @internal\n */\nexport class DefaultDXLinkWebSocketConnector implements DXLinkWebSocketConnector {\n  private socket: WebSocket | undefined = undefined\n\n  private isAvailable = false\n\n  private openListener: (() => void) | undefined = undefined\n  private closeListener: DXLinkWebSocketCloseListener | undefined = undefined\n  private messageListener: ((message: DXLinkWebSocketMessage) => void) | undefined = undefined\n\n  constructor(\n    private readonly url: string,\n    private readonly protocols?: string | string[]\n  ) {}\n\n  start() {\n    if (this.socket !== undefined) return\n\n    this.socket = new WebSocket(this.url, this.protocols)\n\n    this.socket.addEventListener('open', this.handleOpen)\n    this.socket.addEventListener('error', this.handleError)\n    this.socket.addEventListener('close', this.handleClosed)\n  }\n\n  stop() {\n    if (this.socket === undefined) return\n\n    this.socket.removeEventListener('open', this.handleOpen)\n    this.socket.removeEventListener('error', this.handleError)\n    this.socket.removeEventListener('close', this.handleClosed)\n    this.socket.removeEventListener('message', this.handleMessage)\n\n    this.socket.close()\n    this.socket = undefined\n    this.isAvailable = false\n  }\n\n  sendMessage = (message: DXLinkWebSocketMessage) => {\n    if (this.socket === undefined || !this.isAvailable) {\n      return\n    }\n\n    this.socket.send(JSON.stringify(message))\n  }\n\n  setOpenListener = (listener: () => void) => {\n    this.openListener = listener\n  }\n\n  setCloseListener = (listener: DXLinkWebSocketCloseListener) => {\n    this.closeListener = listener\n  }\n\n  setMessageListener = (listener: (message: DXLinkWebSocketMessage) => void) => {\n    this.messageListener = listener\n  }\n\n  getUrl = () => this.url\n\n  private handleOpen = () => {\n    if (this.socket === undefined) return\n\n    this.isAvailable = true\n\n    this.socket.removeEventListener('open', this.handleOpen)\n\n    this.socket.addEventListener('message', this.handleMessage)\n    this.socket.addEventListener('close', this.handleClosed)\n\n    this.openListener?.()\n  }\n\n  private handleClosed = (ev: CloseEvent) => {\n    if (this.socket === undefined) return\n\n    this.stop()\n\n    this.closeListener?.(ev.reason, false)\n  }\n\n  private handleError = (_ev: Event) => {\n    if (this.socket === undefined) return\n\n    this.stop()\n\n    this.closeListener?.('Unable to connect', true)\n  }\n\n  private handleMessage = (ev: MessageEvent) => {\n    try {\n      const message = JSON.parse(ev.data)\n      if (typeof message !== 'object') {\n        throw new Error('Unexpected message: ' + typeof message)\n      }\n      if (typeof message.type !== 'string') {\n        throw new Error('Unexpected message type: ' + typeof message.type)\n      }\n      if (typeof message.channel !== 'number') {\n        throw new Error('Unexpected message channel: ' + typeof message.channel)\n      }\n\n      // TODO: validate message properly (e.g. check for type and other fields)\n\n      if (this.messageListener === undefined) {\n        return console.warn('No message listener set')\n      }\n\n      this.messageListener(message)\n    } catch (error) {\n      console.error(error instanceof Error ? error : new Error('Parsing error:' + String(error)))\n    }\n  }\n}\n","import {\n  DXLinkLogLevel,\n  type DXLinkLogger,\n  Logger,\n  Scheduler,\n  type DXLinkConnectionDetails,\n  DXLinkConnectionState,\n  type DXLinkConnectionStateChangeListener,\n  type DXLinkErrorListener,\n  DXLinkAuthState,\n  DXLinkChannelState,\n  type DXLinkAuthStateChangeListener,\n  type DXLinkChannel,\n  type DXLinkError,\n  type DXLinkClient,\n} from '@dxfeed/dxlink-core'\n\nimport { DXLinkWebSocketChannel } from './channel'\nimport type { DXLinkWebSocketClientConfig } from './config'\nimport { type DXLinkWebSocketConnector, DefaultDXLinkWebSocketConnector } from './connector'\nimport {\n  type AuthStateMessage,\n  type ErrorMessage,\n  type DXLinkWebSocketMessage,\n  type SetupMessage,\n  isChannelLifecycleMessage,\n  isChannelMessage,\n  isConnectionMessage,\n} from './messages'\nimport { VERSION } from './version'\n\n/**\n * Protocol version that is used by client.\n */\nexport const DXLINK_WS_PROTOCOL_VERSION = '0.1'\n\nconst CLIENT_VERSION = `DXF-JS/${VERSION}`\n\nconst DEFAULT_CONNECTION_DETAILS: DXLinkConnectionDetails = {\n  protocolVersion: DXLINK_WS_PROTOCOL_VERSION,\n  clientVersion: CLIENT_VERSION,\n}\n\n/**\n * dxLink WebSocket client that can be used to connect to the remote dxLink WebSocket endpoint and open channels to services.\n */\nexport class DXLinkWebSocketClient implements DXLinkClient {\n  private readonly config: DXLinkWebSocketClientConfig\n\n  private readonly logger: DXLinkLogger\n\n  private readonly scheduler = new Scheduler()\n\n  private connector: DXLinkWebSocketConnector | undefined\n\n  private connectionState: DXLinkConnectionState = DXLinkConnectionState.NOT_CONNECTED\n  private connectionDetails: DXLinkConnectionDetails = DEFAULT_CONNECTION_DETAILS\n\n  private authState: DXLinkAuthState = DXLinkAuthState.UNAUTHORIZED\n\n  // Listeners\n  private readonly connectionStateChangeListeners = new Set<DXLinkConnectionStateChangeListener>()\n  private readonly errorListeners = new Set<DXLinkErrorListener>()\n  private readonly authStateChangeListeners = new Set<DXLinkAuthStateChangeListener>()\n\n  /**\n   * Authorization type that was determined by server behavior during setup phase.\n   * This value is used to determine if authorization is required or optional or not defined yet.\n   */\n  private isFirstAuthState = true\n  /**\n   * Last setted auth token that will be sent to server after connection is established or re-established.\n   */\n  private lastSettedAuthToken: string | undefined\n\n  // Stats for keepalive\n  // TODO: mb move to connector\n  private lastReceivedMillis = 0\n  private lastSentMillis = 0\n\n  /**\n   * Count of reconnect attempts since last successful connection.\n   */\n  private reconnectAttempts = 0\n\n  // Channels\n  private globalChannelId = 1\n  private readonly channels = new Map<number, DXLinkWebSocketChannel>()\n\n  /**\n   * Create new instance of {@link DXLinkWebSocketClient}.\n   * @param config Configuration of the client.\n   */\n  constructor(config?: Partial<DXLinkWebSocketClientConfig>) {\n    this.config = {\n      keepaliveInterval: 30,\n      keepaliveTimeout: 60,\n      acceptKeepaliveTimeout: 60,\n      actionTimeout: 10,\n      logLevel: DXLinkLogLevel.WARN,\n      maxReconnectAttempts: -1,\n      connectorFactory: (url) => new DefaultDXLinkWebSocketConnector(url),\n      ...config,\n    }\n\n    this.logger = new Logger(this.constructor.name, this.config.logLevel)\n  }\n\n  connect = (url: string) => {\n    // Do nothing if already connected to the same url\n    if (this.connector?.getUrl() === url) return\n\n    // Disconnect from previous connection if any exists\n    this.disconnect()\n\n    this.logger.debug('Connecting to', url)\n\n    // Immediately set connection state to CONNECTING\n    this.setConnectionState(DXLinkConnectionState.CONNECTING)\n\n    // Create new connector\n    this.connector = this.config.connectorFactory(url)\n    this.connector.setOpenListener(this.processTransportOpen)\n    this.connector.setMessageListener(this.processMessage)\n    this.connector.setCloseListener(this.processTransportClose)\n\n    // Initiate websocket connection\n    this.connector.start()\n  }\n\n  reconnect = () => {\n    if (\n      this.config.maxReconnectAttempts >= 0 &&\n      this.reconnectAttempts >= this.config.maxReconnectAttempts\n    ) {\n      this.logger.warn('Max reconnect attempts reached')\n\n      this.disconnect()\n      return\n    }\n\n    if (\n      this.connectionState === DXLinkConnectionState.NOT_CONNECTED ||\n      this.connector === undefined\n    )\n      return\n\n    this.logger.debug('Trying to reconnect', this.connector.getUrl())\n\n    this.connector.stop()\n\n    // Clear all timeouts\n    this.scheduler.clear()\n\n    // Set initial state\n    this.connectionDetails = DEFAULT_CONNECTION_DETAILS\n    this.lastReceivedMillis = 0\n    this.lastSentMillis = 0\n    this.isFirstAuthState = true\n\n    // Increase reconnect attempts counter\n    this.reconnectAttempts++\n\n    // Update state for connection and channels\n    this.setConnectionState(DXLinkConnectionState.CONNECTING)\n    for (const channel of this.channels.values()) {\n      if (channel.getState() === DXLinkChannelState.CLOSED) continue\n\n      channel.processStatusRequested()\n    }\n\n    // Schedule reconnect attempt after some time\n    // Additionally, task will be executed in case when tab is active again\n    // coz browser sometimes doesn't run scheduled tasks when tab is inactive\n    this.scheduler.schedule(\n      () => {\n        if (this.connector === undefined) return\n\n        // Start new connection attempt\n        this.connector.start()\n      },\n      this.reconnectAttempts * 1000,\n      'RECONNECT'\n    )\n  }\n\n  disconnect = () => {\n    if (this.connectionState === DXLinkConnectionState.NOT_CONNECTED) return\n\n    this.logger.debug('Disconnecting')\n\n    // Destroy connector\n    this.connector?.stop()\n    this.connector = undefined\n\n    // Clear all timeouts\n    this.scheduler.clear()\n\n    // Set initial state\n    this.connectionDetails = DEFAULT_CONNECTION_DETAILS\n    this.lastReceivedMillis = 0\n    this.lastSentMillis = 0\n    this.isFirstAuthState = true\n    this.reconnectAttempts = 0\n\n    this.setConnectionState(DXLinkConnectionState.NOT_CONNECTED)\n    this.setAuthState(DXLinkAuthState.UNAUTHORIZED)\n  }\n\n  close = () => {\n    this.disconnect()\n  }\n\n  getConnectionDetails = () => this.connectionDetails\n  getConnectionState = () => this.connectionState\n  addConnectionStateChangeListener = (listener: DXLinkConnectionStateChangeListener) =>\n    this.connectionStateChangeListeners.add(listener)\n  removeConnectionStateChangeListener = (listener: DXLinkConnectionStateChangeListener) =>\n    this.connectionStateChangeListeners.delete(listener)\n\n  setAuthToken = (token: string): void => {\n    this.lastSettedAuthToken = token\n\n    if (this.connectionState === DXLinkConnectionState.CONNECTED) {\n      this.sendAuthMessage(token)\n    }\n  }\n\n  getAuthState = (): DXLinkAuthState => this.authState\n  addAuthStateChangeListener = (listener: DXLinkAuthStateChangeListener) =>\n    this.authStateChangeListeners.add(listener)\n  removeAuthStateChangeListener = (listener: DXLinkAuthStateChangeListener) =>\n    this.authStateChangeListeners.delete(listener)\n\n  addErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.add(listener)\n  removeErrorListener = (listener: DXLinkErrorListener) => this.errorListeners.delete(listener)\n\n  openChannel = (service: string, parameters: Record<string, unknown>): DXLinkChannel => {\n    const channelId = this.globalChannelId\n    this.globalChannelId += 2\n\n    const channel = new DXLinkWebSocketChannel(\n      channelId,\n      service,\n      parameters,\n      this.sendMessage,\n      this.config\n    )\n\n    this.channels.set(channelId, channel)\n\n    // Send channel request if connection is already established\n    if (\n      this.connectionState === DXLinkConnectionState.CONNECTED &&\n      this.authState === DXLinkAuthState.AUTHORIZED\n    ) {\n      channel.request()\n    }\n\n    return channel\n  }\n\n  private setConnectionState = (newStatus: DXLinkConnectionState) => {\n    const prev = this.connectionState\n    if (prev === newStatus) return\n\n    this.connectionState = newStatus\n    for (const listener of this.connectionStateChangeListeners) {\n      listener(newStatus, prev)\n    }\n  }\n\n  private sendMessage = (message: DXLinkWebSocketMessage): void => {\n    this.connector?.sendMessage(message)\n\n    this.scheduleKeepalive()\n\n    // TODO: mb move to connector\n    this.lastSentMillis = Date.now()\n  }\n\n  private sendAuthMessage = (token: string): void => {\n    this.logger.debug('Sending auth message')\n\n    this.setAuthState(DXLinkAuthState.AUTHORIZING)\n\n    this.sendMessage({\n      type: 'AUTH',\n      channel: 0,\n      token,\n    })\n  }\n\n  private setAuthState = (newState: DXLinkAuthState): void => {\n    const prev = this.authState\n\n    this.authState = newState\n    for (const listener of this.authStateChangeListeners) {\n      try {\n        listener(newState, prev)\n      } catch (e) {\n        this.logger.error('Auth state listener error', e)\n      }\n    }\n  }\n\n  private processMessage = (message: DXLinkWebSocketMessage): void => {\n    this.lastReceivedMillis = Date.now()\n\n    // Send keepalive message if no messages sent for a while (keepaliveInterval)\n    // Because browser sometimes doesn't run scheduled tasks when tab is inactive\n    if (this.lastReceivedMillis - this.lastSentMillis >= this.config.keepaliveInterval * 1000) {\n      this.sendMessage({\n        type: 'KEEPALIVE',\n        channel: 0,\n      })\n    }\n\n    // Connection messages are messages that are sent to the channel 0\n    if (isConnectionMessage(message)) {\n      switch (message.type) {\n        case 'SETUP':\n          return this.processSetupMessage(message)\n        case 'AUTH_STATE':\n          return this.processAuthStateMessage(message)\n        case 'ERROR':\n          return this.publishError({\n            type: message.error,\n            message: message.message,\n          })\n        case 'KEEPALIVE':\n          // Ignore keepalive messages coz they are used only to maintain connection\n          return\n      }\n    } else if (isChannelMessage(message)) {\n      const channel = this.channels.get(message.channel)\n      if (channel === undefined) {\n        this.logger.warn('Received lifecycle message for unknown channel', message)\n        return\n      }\n\n      if (isChannelLifecycleMessage(message)) {\n        switch (message.type) {\n          case 'CHANNEL_OPENED':\n            return channel.processStatusOpened()\n          case 'CHANNEL_CLOSED':\n            return channel.processStatusClosed()\n          case 'ERROR':\n            return channel.processError({\n              type: message.error,\n              message: message.message,\n            })\n        }\n        return\n      }\n\n      return channel.processPayloadMessage(message)\n    }\n\n    this.logger.warn('Unhandeled message', message.type)\n  }\n\n  private processSetupMessage = (serverSetup: SetupMessage): void => {\n    // Clear setup timeout check from connect method\n    this.scheduler.cancel('SETUP_TIMEOUT')\n\n    // Mark connection as connected after first setup message and subsequent ones\n    if (\n      this.connectionState === DXLinkConnectionState.CONNECTING ||\n      this.connectionState === DXLinkConnectionState.CONNECTED\n    ) {\n      this.connectionDetails = {\n        ...this.connectionDetails,\n        serverVersion: serverSetup.version,\n        clientKeepaliveTimeout: this.config.keepaliveTimeout,\n        serverKeepaliveTimeout: serverSetup.keepaliveTimeout,\n      }\n\n      // Reset reconnect attempts counter after successful connection\n      this.reconnectAttempts = 0\n\n      if (this.lastSettedAuthToken === undefined) {\n        this.setConnectionState(DXLinkConnectionState.CONNECTED)\n      }\n    }\n\n    // Connection maintance: Setup keepalive timeout check\n    const timeoutMills = (serverSetup.keepaliveTimeout ?? 60) * 1000\n    this.scheduler.schedule(() => this.timeoutCheck(timeoutMills), timeoutMills, 'TIMEOUT')\n  }\n\n  private publishError = (error: DXLinkError): void => {\n    this.logger.debug('Publishing error', error)\n\n    if (this.errorListeners.size === 0) {\n      this.logger.error('Unhandled dxLink error', error)\n      return\n    }\n\n    for (const listener of this.errorListeners) {\n      try {\n        listener(error)\n      } catch (e) {\n        this.logger.error('Error listener error', e)\n      }\n    }\n  }\n\n  private processAuthStateMessage = ({ state }: AuthStateMessage): void => {\n    this.logger.debug('Received auth state message', state)\n\n    // Clear auth state timeout check\n    this.scheduler.cancel('AUTH_STATE_TIMEOUT')\n\n    // Ignore first auth state message because it is sent during connection setup\n    if (this.isFirstAuthState) {\n      this.isFirstAuthState = false\n    } else {\n      // Reset auth token if server rejected it\n      if (state === 'UNAUTHORIZED') {\n        this.lastSettedAuthToken = undefined\n      }\n    }\n\n    // Request active channels if connection is authorized\n    if (state === 'AUTHORIZED') {\n      this.setConnectionState(DXLinkConnectionState.CONNECTED)\n\n      this.requestActiveChannels()\n    }\n\n    this.setAuthState(DXLinkAuthState[state])\n  }\n\n  private requestActiveChannels = (): void => {\n    for (const channel of this.channels.values()) {\n      // clear closed channels\n      if (channel.getState() === DXLinkChannelState.CLOSED) {\n        this.channels.delete(channel.id)\n        continue\n      }\n\n      channel.request()\n    }\n  }\n\n  /**\n   * Process transport open event from connector.\n   * After transport is opened:\n   * - setup message is sent to server\n   * - auth message is sent to server if auth token is set\n   * - wait for setup message from server\n   * - wait for auth state message from server\n   */\n  private processTransportOpen = (): void => {\n    this.logger.debug('Connection opened')\n\n    const setupMessage: SetupMessage = {\n      type: 'SETUP',\n      channel: 0,\n      version: `${this.connectionDetails.protocolVersion}-${this.connectionDetails.clientVersion}`,\n      keepaliveTimeout: this.config.keepaliveTimeout,\n      acceptKeepaliveTimeout: this.config.acceptKeepaliveTimeout,\n    }\n\n    // Setup timeout check\n    this.scheduler.schedule(\n      () => {\n        const errorMessage: ErrorMessage = {\n          type: 'ERROR',\n          channel: 0,\n          error: 'TIMEOUT',\n          message: 'No setup message received for ' + this.config.actionTimeout + 's',\n        }\n\n        this.sendMessage(errorMessage)\n\n        this.publishError({\n          type: errorMessage.error,\n          message: `${errorMessage.message} from server`,\n        })\n\n        // Disconnect if no setup message received\n        this.reconnect()\n      },\n      this.config.actionTimeout * 1000,\n      'SETUP_TIMEOUT'\n    )\n\n    this.sendMessage(setupMessage)\n\n    this.scheduler.schedule(\n      () => {\n        const errorMessage: ErrorMessage = {\n          type: 'ERROR',\n          channel: 0,\n          error: 'TIMEOUT',\n          message: 'No auth state message received for ' + this.config.actionTimeout + 's',\n        }\n\n        this.sendMessage(errorMessage)\n\n        this.publishError({\n          type: errorMessage.error,\n          message: `${errorMessage.message} from server`,\n        })\n\n        // Disconnect if no auth state message received\n        this.reconnect()\n      },\n      this.config.actionTimeout * 1000,\n      'AUTH_STATE_TIMEOUT'\n    )\n\n    if (this.lastSettedAuthToken !== undefined) {\n      this.sendAuthMessage(this.lastSettedAuthToken)\n    }\n  }\n\n  /**\n   *  Process transport close event from connector.\n   *  After transport is closed by server:\n   * - reconnect if connection is authorized\n   * - disconnect if connection is not authorized\n   */\n  private processTransportClose = (reason: string, error: boolean): void => {\n    this.logger.debug('Connection closed', reason)\n\n    if (error !== undefined) {\n      this.publishError({\n        type: 'UNKNOWN',\n        message: reason,\n      })\n    }\n\n    if (this.authState === DXLinkAuthState.UNAUTHORIZED) {\n      this.lastSettedAuthToken = undefined\n      this.disconnect()\n      return\n    }\n\n    this.reconnect()\n  }\n\n  private timeoutCheck = (timeoutMills: number) => {\n    const now = Date.now()\n    const noKeepaliveDuration = now - this.lastReceivedMillis\n    if (noKeepaliveDuration >= timeoutMills) {\n      this.sendMessage({\n        type: 'ERROR',\n        channel: 0,\n        error: 'TIMEOUT',\n        message: 'No keepalive received for ' + noKeepaliveDuration + 'ms',\n      })\n\n      return this.reconnect()\n    }\n\n    const nextTimeout = Math.max(200, timeoutMills - noKeepaliveDuration)\n    this.scheduler.schedule(() => this.timeoutCheck(timeoutMills), nextTimeout, 'TIMEOUT')\n  }\n\n  private scheduleKeepalive = () => {\n    this.scheduler.schedule(\n      () => {\n        this.sendMessage({\n          type: 'KEEPALIVE',\n          channel: 0,\n        })\n\n        this.scheduleKeepalive()\n      },\n      this.config.keepaliveInterval * 1000,\n      'KEEPALIVE'\n    )\n  }\n}\n","export interface AuthMessage {\n  type: 'AUTH'\n  channel: 0\n  token: string\n}\n\nexport type AuthState = 'AUTHORIZED' | 'UNAUTHORIZED'\n\nexport interface AuthStateMessage {\n  type: 'AUTH_STATE'\n  channel: 0\n  state: AuthState\n}\n\nexport interface SetupMessage {\n  type: 'SETUP'\n  channel: 0\n  version: string\n  keepaliveTimeout?: number\n  acceptKeepaliveTimeout?: number\n}\n\nexport interface KeepaliveMessage {\n  type: 'KEEPALIVE'\n  channel: 0\n}\n\nexport interface ChannelRequestMessage {\n  type: 'CHANNEL_REQUEST'\n  channel: number\n  service: string\n  parameters?: Record<string, unknown>\n}\n\nexport interface ChannelCancelMessage {\n  type: 'CHANNEL_CANCEL'\n  channel: number\n}\n\nexport interface ChannelOpenedMessage {\n  type: 'CHANNEL_OPENED'\n  channel: number\n  service: string\n  parameters?: Record<string, unknown>\n}\n\nexport interface ChannelClosedMessage {\n  type: 'CHANNEL_CLOSED'\n  channel: number\n}\n\nexport type ErrorType =\n  | 'UNKNOWN'\n  | 'UNSUPPORTED_PROTOCOL'\n  | 'TIMEOUT'\n  | 'UNAUTHORIZED'\n  | 'INVALID_MESSAGE'\n  | 'BAD_ACTION'\n\nexport interface ErrorMessage {\n  type: 'ERROR'\n  channel: 0\n  error: ErrorType\n  message: string\n}\n\nexport interface ChannelErrorMessage {\n  type: 'ERROR'\n  channel: number\n  error: ErrorType\n  message: string\n}\n\nexport interface ChannelPayloadMessage {\n  type: string\n  channel: number\n  [key: string]: unknown\n}\n\nexport type ConnectionMessage =\n  | SetupMessage\n  | KeepaliveMessage\n  | AuthMessage\n  | AuthStateMessage\n  | ErrorMessage\n\nexport type DXLinkWebSocketMessage =\n  | SetupMessage\n  | KeepaliveMessage\n  | AuthMessage\n  | AuthStateMessage\n  | ErrorMessage\n  | ChannelRequestMessage\n  | ChannelCancelMessage\n  | ChannelOpenedMessage\n  | ChannelClosedMessage\n  | ChannelPayloadMessage\n  | ChannelErrorMessage\n\nexport const isConnectionMessage = (\n  message: DXLinkWebSocketMessage\n): message is ConnectionMessage =>\n  message.channel === 0 &&\n  (message.type === 'SETUP' ||\n    message.type === 'KEEPALIVE' ||\n    message.type === 'AUTH' ||\n    message.type === 'AUTH_STATE' ||\n    message.type === 'ERROR')\n\nexport type ChannelLifecycleMessage =\n  | ChannelOpenedMessage\n  | ChannelClosedMessage\n  | ChannelErrorMessage\n  | ChannelRequestMessage\n  | ChannelCancelMessage\n\nexport type ChannelMessage = ChannelLifecycleMessage | ChannelPayloadMessage\n\nexport const isChannelMessage = (message: DXLinkWebSocketMessage): message is ChannelMessage =>\n  message.channel !== 0\n\nexport const isChannelLifecycleMessage = (\n  message: ChannelMessage\n): message is ChannelLifecycleMessage =>\n  message.type === 'CHANNEL_OPENED' ||\n  message.type === 'CHANNEL_CLOSED' ||\n  message.type === 'ERROR' ||\n  message.type === 'CHANNEL_REQUEST' ||\n  message.type === 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build/messages.d.ts

@@ -62,7 +62,7 @@ export interface AuthMessage {
 export type ConnectionMessage = SetupMessage | KeepaliveMessage | AuthMessage | AuthStateMessage | ErrorMessage;
-export type Message = SetupMessage | KeepaliveMessage | AuthMessage | AuthStateMessage | ErrorMessage | ChannelRequestMessage | ChannelCancelMessage | ChannelOpenedMessage | ChannelClosedMessage | ChannelPayloadMessage | ChannelErrorMessage;
-export declare const isConnectionMessage: (message: Message) => message is ConnectionMessage;
+export type DXLinkWebSocketMessage = SetupMessage | KeepaliveMessage | AuthMessage | AuthStateMessage | ErrorMessage | ChannelRequestMessage | ChannelCancelMessage | ChannelOpenedMessage | ChannelClosedMessage | ChannelPayloadMessage | ChannelErrorMessage;
+export declare const isConnectionMessage: (message: DXLinkWebSocketMessage) => message is ConnectionMessage;
 export type ChannelLifecycleMessage = ChannelOpenedMessage | ChannelClosedMessage | ChannelErrorMessage | ChannelRequestMessage | ChannelCancelMessage;
 export type ChannelMessage = ChannelLifecycleMessage | ChannelPayloadMessage;
-export declare const isChannelMessage: (message: Message) => message is ChannelMessage;
+export declare const isChannelMessage: (message: DXLinkWebSocketMessage) => message is ChannelMessage;
 export declare const isChannelLifecycleMessage: (message: ChannelMessage) => message is ChannelLifecycleMessage;

package.json

 {
   "name": "@dxfeed/dxlink-websocket-client",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "private": false,
@@ -33,3 +33,3 @@ "publishConfig": {
   "dependencies": {
-    "@dxfeed/dxlink-core": "0.3.0"
+    "@dxfeed/dxlink-core": "0.4.0"
   },
@@ -36,0 +36,0 @@ "author": "Dmitry Petrov <[e-mail]>",

build/api.d.ts

-import { type DXLinkWebSocketClient } from './dxlink';
-import { type DXLinkWebSocketClientOptions } from './client';
-import { type DXLinkFeed, type DXLinkFeedOptions } from './feed';
-import { DXLinkLogLevel } from '@dxfeed/dxlink-core';
-import { FeedContract } from './feed-messages';
-/**
- * The options to use for the {@link DXLink}.
- */
-export interface DXLinkOptions {
-    logLevel?: DXLinkLogLevel;
-    /**
-     * The options for the {@link DXLinkWebSocketClient}.
-     */
-    client?: Partial<DXLinkWebSocketClientOptions>;
-    /**
-     * The options for the {@link DXLinkFeed}.
-     */
-    feed?: Partial<DXLinkFeedOptions>;
-}
-/**
- * The main entry point for the DXLink API.
- * This class provides access to dxFeed services with a single dxLink connection.
- * It is recommended to use a single instance of this class per application.
- * @example <caption>Creating a new instance of {@link DXLink} with default options.</caption>
- * ```typescript
- * const dxlink = new DXLink()
- * ```
- * @example <caption>Connecting to the server.</caption>
- * ```typescript
- * dxlink.connect('wss://demo.dxfeed.com/dxlink-ws')
- * ```
- * @example <caption>Creating a new instance of {@link DXLinkFeed}.</caption>
- * ```typescript
- * const feed = dxlink.createFeed(FeedContract.TICKER)
- * ````
- * @example <caption>Subscribing to feed events.</caption>
- * ```typescript
- * feed.addSubscription({ type: 'Quote', symbol: 'AAPL' })
- * feed.addEventListener((events) => console.log(events))
- * ```
- */
-export declare class DXLink {
-    private readonly options?;
-    /**
-     * A singleton instance of {@link DXLink} that is created on the first use of {@link DXLink.getInstance}.
-     */
-    private static instance;
-    /**
-     * Returns a default application-wide singleton instance of {@link DXLink}.
-     * Most applications use only a single data-source and should rely on this method to get one.
-     * This method creates an endpoint on the first use with a default configuration.
-     */
-    static getInstance(): DXLink;
-    private readonly client;
-    /**
-     * Creates a new instance of {@link DXLink} with the specified options.
-     * @param options - The options to use for the instance.
-     */
-    constructor(options?: DXLinkOptions | undefined);
-    /**
-     * Connects to the server.
-     * @see {DXLinkWebSocketClient.connect} for more details.
-     */
-    connect(url: string): void;
-    /**
-     * Reconnects to the server.
-     * @see {DXLinkWebSocketClient.reconnect} for more details.
-     */
-    reconnect(): void;
-    /**
-     * Disconnects from the server.
-     * @see {DXLinkWebSocketClient.disconnect} for more details.
-     */
-    disconnect(): void;
-    /**
-     * Returns the {@link DXLinkWebSocketClient} instance.
-     */
-    getClient(): DXLinkWebSocketClient;
-    /**
-     * Creates a new feed for the specified contract.
-     * @see {DXLinkFeed} for more details.
-     */
-    createFeed<Contract extends FeedContract>(contract: Contract): DXLinkFeed<Contract>;
-    /**
-     * Closes the client and releases all resources.
-     */
-    close(): void;
-}

build/client-config.d.ts

-import type { DXLinkLogLevel } from '@dxfeed/dxlink-core';
-/**
- * Options for {@link DXLinkWebSocketClient}.
- */
-export interface DXLinkWebSocketClientConfig {
-    /**
-     * Interval in seconds between keepalive messages which are sent to server.
-     */
-    readonly keepaliveInterval: number;
-    /**
-     * Timeout in seconds for server to detect that client is disconnected.
-     * @see {DXLinkConnectionDetails.clientKeepaliveTimeout}
-     */
-    readonly keepaliveTimeout: number;
-    /**
-     * Prefered timeout in seconds in for client to detect that server is disconnected.
-     * @see {DXLinkConnectionDetails.serverKeepaliveTimeout}
-     */
-    readonly acceptKeepaliveTimeout: number;
-    /**
-     * Timeout for action which requires update from server.
-     */
-    readonly actionTimeout: number;
-    /**
-     * Log level for internal logger.
-     */
-    readonly logLevel: DXLinkLogLevel;
-    /**
-     * Maximum number of reconnect attempts.
-     * If connection is not established after this number of attempts, connection will be closed.
-     * If 0, then reconnect attempts are not limited.
-     */
-    readonly maxReconnectAttempts: number;
-}

build/dxlink.d.ts

-import { type ErrorType } from './messages';
-/**
- * Error type that can be used to handle errors or send them to the remote endpoint.
- */
-export type DXLinkErrorType = ErrorType;
-/**
- * Unified error that can be used to handle errors or send them to the remote endpoint.
- * @see {DXLinkChannel.error}
- * @see {DXLinkWebSocketClient.addErrorListener}
- */
-export interface DXLinkError {
-    /**
-     * Type of the error.
-     * @example 'TIMEOUT'
-     */
-    readonly type: DXLinkErrorType;
-    /**
-     * Message of the error with details.
-     * @example 'Timeout exceeded'
-     */
-    readonly message: string;
-}
-/**
- * Connection state that can be used to check if connection is established and ready to use.
- * @see {DXLinkWebSocketClient.getConnectionState}
- */
-export declare enum DXLinkConnectionState {
-    /**
-     * Client was created and not connected to remote endpoint.
-     * @see {DXLinkWebSocketClient.connect}
-     */
-    NOT_CONNECTED = "NOT_CONNECTED",
-    /**
-     * The {@link DXLinkWebSocketClient.connect} method was called to establish connection or {@link DXLinkWebSocketClient.reconnect} is in progress.
-     * The connection is not ready to use yet.
-     */
-    CONNECTING = "CONNECTING",
-    /**
-     * The connection to remote endpoint is established.
-     * The connection is ready to use.
-     */
-    CONNECTED = "CONNECTED"
-}
-/**
- * Connection details that can be used for debugging or logging.
- */
-export interface DXLinkConnectionDetails {
-    /**
-     * Protocol version used for connection to the remote endpoint.
-     */
-    readonly protocolVersion: string;
-    /**
-     * Version of the client library.
-     */
-    readonly clientVersion: string;
-    /**
-     * Version of the server which the client is connected to.
-     */
-    readonly serverVersion?: string;
-    /**
-     * Timeout in seconds for server to detect that client is disconnected.
-     * If no keepalive message received from client during this time, server will close connection.
-     */
-    readonly clientKeepaliveTimeout?: number;
-    /**
-     * Timeout in seconds in for client to detect that server is disconnected.
-     * If no keepalive message received from server during this time, client will close connection.
-     */
-    readonly serverKeepaliveTimeout?: number;
-}
-/**
- * Listener for connection state changes.
- */
-export type DXLinkConnectionStateChangeListener = (state: DXLinkConnectionState, prev: DXLinkConnectionState) => void;
-/**
- * Authentication state that can be used to check if user is authorized on the remote endpoint.
- */
-export declare enum DXLinkAuthState {
-    /**
-     * User is unauthorized on the remote endpoint.
-     */
-    UNAUTHORIZED = "UNAUTHORIZED",
-    /**
-     * User in the process of authorization, but not yet authorized.
-     */
-    AUTHORIZING = "AUTHORIZING",
-    /**
-     * User is authorized on the remote endpoint and can use it.
-     */
-    AUTHORIZED = "AUTHORIZED"
-}
-/**
- * Listener for authentication state changes.
- */
-export type DXLinkAuthStateChangeListener = (state: DXLinkAuthState, prev: DXLinkAuthState) => void;
-/**
- * Message that can be sent to or received from the channel.
- * @see {DXLinkChannel.send} and {@link DXLinkChannel.addMessageListener}
- */
-export interface DXLinkChannelMessage {
-    /**
-     * Type of the message.
-     */
-    readonly type: string;
-    /**
-     * Payload of the message.
-     */
-    readonly [key: string]: any;
-}
-/**
- * Listener for messages from the channel.
- * @see {DXLinkChannel.addMessageListener}
- */
-export type DXLinkChannelMessageListener = (message: DXLinkChannelMessage) => void;
-/**
- * Listener for channel state changes.
- * @see {DXLinkChannel.addStateChangeListener}
- */
-export type DXLinkChannelStateChangeListener = (state: DXLinkChannelState, prev: DXLinkChannelState) => void;
-/**
- * Listener for errors from the server.
- * @see {DXLinkWebSocketClient.addErrorListener}
- */
-export type DXLinkErrorListener = (error: DXLinkError) => void;
-/**
- * Channel state that can be used to check if channel is available for sending messages.
- * @see {DXLinkChannel.getState}
- */
-export declare enum DXLinkChannelState {
-    /**
-     * Channel is requested and cannot be used to {@link DXLinkChannel.send} messages yet.
-     */
-    REQUESTED = "REQUESTED",
-    /**
-     * Channel is opened and can be used to {@link DXLinkChannel.send} messages.
-     */
-    OPENED = "OPENED",
-    /**
-     * Channel was closed by {@link DXLinkChannel.close} or by server.
-     * Channel cannot be used anymore.
-     */
-    CLOSED = "CLOSED"
-}
-/**
- * Isolated channel to service withing single {@link DXLinkWebSocketClient} connection to remote endpoint.
- * @see DXLinkWebSocketClient.openChannel
- */
-export interface DXLinkChannel {
-    /**
-     * Unique identifier of the channel.
-     */
-    readonly id: number;
-    /**
-     * Name of the service that channel is opened to.
-     */
-    readonly service: string;
-    /**
-     *
-     */
-    readonly parameters: Record<string, unknown>;
-    /**
-     * Send a message to the channel.
-     */
-    send(message: DXLinkChannelMessage): void;
-    /**
-     * Add a listener for messages from the channel.
-     */
-    addMessageListener(listener: DXLinkChannelMessageListener): void;
-    /**
-     * Remove a listener for messages from the channel.
-     */
-    removeMessageListener(listener: DXLinkChannelMessageListener): void;
-    /**
-     * Get channel state that can be used to check if channel is available for sending messages.
-     */
-    getState(): DXLinkChannelState;
-    /**
-     * Add a listener for channel state changes.
-     * If channel is ready to use, listener will be called immediately with {@link DXLinkChannelState.OPENED} state.
-     * @see {DXLinkChannelState}
-     * Note: when remote endpoint reconnects, channel will be reopened and listener will be called with {@link DXLinkChannelState.OPENED} state again.
-     * @see {DXLinkWebSocketClient.getConnectionState}
-     */
-    addStateChangeListener(listener: DXLinkChannelStateChangeListener): void;
-    /**
-     * Remove a listener for channel state changes.
-     */
-    removeStateChangeListener(listener: DXLinkChannelStateChangeListener): void;
-    /**
-     * Add a listener for errors from the server.
-     * @see {DXLinkError}
-     */
-    addErrorListener(listener: DXLinkErrorListener): void;
-    /**
-     * Remove a listener for errors from the server.
-     * @see {DXLinkError}
-     */
-    removeErrorListener(listener: DXLinkErrorListener): void;
-    /**
-     * Close the channel and free all resources.
-     * This method does nothing if the channel is already closed.
-     * The channel {@see DXLinkChannel.getStatus} immediately becomes {@link State#CLOSED CLOSED}.
-     * @see {DXLinkChannelState}
-     */
-    close(): void;
-}
-/**
- * dxLink WebSocket client that can be used to connect to the remote dxLink WebSocket endpoint and open channels to services.
- */
-export interface DXLinkWebSocketClient {
-    /**
-     * Connect to the remote endpoint.
-     * Connects to the specified remote address. Previously established connections are closed if the new address is different from the old one.
-     * This method does nothing if address does not change.
-     * The endpoint {@see DXLinkWebSocketClient.getConnectionState} immediately becomes {@link State#CONNECTING CONNECTING}.
-     *
-     * For connection with the authorization token, use {@link DXLinkWebSocketClient.setAuthToken} before calling this method.
-     * If the token is not set, the connection will be established without authorization.
-     *
-     * @param url WebSocket URL to connect to.
-     */
-    connect(url: string): void;
-    /**
-     * Reconnect to the remote endpoint.
-     * This method does nothing if the client is not connected.
-     * The endpoint {@see DXLinkWebSocketClient.getConnectionState} immediately becomes {@link State#CONNECTING CONNECTING}.
-     * @see {DXLinkWebSocketClient.connect}
-     */
-    reconnect(): void;
-    /**
-     * Disconnect from the remote endpoint.
-     * This method does nothing if the client is not connected.
-     * The endpoint {@see DXLinkWebSocketClient.getConnectionState} immediately becomes {@link State#NOT_CONNECTED NOT_CONNECTED}.
-     * @see {DXLinkWebSocketClient.connect}
-     */
-    disconnect(): void;
-    /**
-     * Get connection details that can be used for debugging or logging.
-     */
-    getConnectionDetails(): DXLinkConnectionDetails;
-    /**
-     * Get connection state that can be used to check if connection is established and ready to use.
-     */
-    getConnectionState(): DXLinkConnectionState;
-    /**
-     * Add a listener for connection state changes.
-     */
-    addConnectionStateChangeListener(listener: DXLinkConnectionStateChangeListener): void;
-    /**
-     * Remove a listener for connection state changes.
-     */
-    removeConnectionStateChangeListener(listener: DXLinkConnectionStateChangeListener): void;
-    /**
-     * Set authorization token to be used for connection to the remote endpoint.
-     * This method does nothing if the client is connected.
-     * @param token Authorization token to be used for connection.
-     */
-    setAuthToken(token: string): void;
-    /**
-     * Get authentication state that can be used to check if user is authorized on the remote endpoint.
-     */
-    getAuthState(): DXLinkAuthState;
-    /**
-     * Add a listener for authentication state changes.
-     * When auth state is {@link DXLinkAuthState.UNAUTHORIZED}, you can call {@link DXLinkWebSocketClient.setAuthToken} to authorize the client.
-     */
-    addAuthStateChangeListener(listener: DXLinkAuthStateChangeListener): void;
-    /**
-     * Remove a listener for authentication state changes.
-     */
-    removeAuthStateChangeListener(listener: DXLinkAuthStateChangeListener): void;
-    /**
-     * Error listener that can be used to handle errors from the server.
-     */
-    addErrorListener(listener: DXLinkErrorListener): void;
-    /**
-     * Remove a listener for errors from the server.
-     */
-    removeErrorListener(listener: DXLinkErrorListener): void;
-    /**
-     * Open a isolated channel to service withing single {@link DXLinkWebSocketClient} connection to remote endpoint.
-     * @param service Name of the service to open channel to.
-     * @param parameters Parameters of the service to open channel to.
-     * @see {DXLinkChannel}
-     */
-    openChannel(service: string, parameters: Record<string, unknown>): DXLinkChannel;
-    /**
-     * Close the client and free all resources.
-     * This method works the same as {@link DXLinkWebSocketClient.disconnect}.
-     */
-    close(): void;
-}

build/feed-messages.d.ts

-import { type DXLinkChannelMessage } from './dxlink';
-export declare enum FeedContract {
-    'TICKER' = "TICKER",
-    'HISTORY' = "HISTORY",
-    'STREAM' = "STREAM",
-    'AUTO' = "AUTO"
-}
-export declare enum FeedDataFormat {
-    'FULL' = "FULL",
-    'COMPACT' = "COMPACT"
-}
-export interface FeedParameters {
-    readonly contract: FeedContract;
-}
-export interface FeedEventFields {
-    [eventType: string]: string[];
-}
-export interface FeedSetupMessage {
-    readonly type: 'FEED_SETUP';
-    readonly acceptAggregationPeriod?: number;
-    readonly acceptDataFormat?: FeedDataFormat;
-    readonly acceptEventFields?: FeedEventFields;
-}
-export interface FeedConfigMessage {
-    readonly type: 'FEED_CONFIG';
-    readonly aggregationPeriod: number;
-    readonly dataFormat: FeedDataFormat;
-    readonly eventFields?: FeedEventFields;
-}
-export type Subscription = {
-    readonly type: string;
-    readonly symbol: string;
-};
-export type TimeSeriesSubscription = {
-    readonly type: string;
-    readonly symbol: string;
-    readonly fromTime: number;
-};
-export type IndexedEventSubscription = {
-    readonly type: string;
-    readonly symbol: string;
-    readonly source: string;
-};
-export interface FeedSubscriptionMessage {
-    readonly type: 'FEED_SUBSCRIPTION';
-    readonly add?: (Subscription | TimeSeriesSubscription | IndexedEventSubscription)[];
-    readonly remove?: (Subscription | TimeSeriesSubscription | IndexedEventSubscription)[];
-    readonly reset?: boolean;
-}
-export type FeedEventValue = number | string | boolean;
-export interface FeedEventData {
-    [key: string]: FeedEventValue;
-}
-export type FeedCompactEventData = [string, FeedEventValue[]];
-export interface FeedDataMessage {
-    readonly type: 'FEED_DATA';
-    readonly data: FeedEventData[] | FeedCompactEventData;
-}
-export type FeedMessage = FeedSetupMessage | FeedConfigMessage | FeedSubscriptionMessage | FeedDataMessage;
-export declare const isFeedFullData: (data: FeedEventData[] | FeedCompactEventData) => data is FeedEventData[];
-export declare const isFeedCompactData: (data: FeedEventData[] | FeedCompactEventData) => data is FeedCompactEventData;
-export declare const isFeedMessage: (message: DXLinkChannelMessage) => message is FeedMessage;

build/feed.d.ts

-import { type DXLinkChannel, DXLinkChannelState, type DXLinkChannelStateChangeListener, type DXLinkWebSocketClient } from './dxlink';
-import { type FeedEventFields, FeedContract, FeedDataFormat, type IndexedEventSubscription, type Subscription, type TimeSeriesSubscription, type FeedEventData } from './feed-messages';
-import { DXLinkLogLevel } from '@dxfeed/dxlink-core';
-/**
- * Prefered configuration for the feed channel.
- * Server can ignore some of the parameters and use own defaults.
- * @see {DXLinkFeed.configure}
- */
-export interface FeedAcceptConfig {
-    /**
-     * Aggregation period in seconds.
-     * If not specified, the channel will use the default value.
-     * If specified as 0, the channel will try not aggregate events.
-     */
-    acceptAggregationPeriod?: number;
-    /**
-     * Data format to be used for received events.
-     * If not specified, the channel will use the default value `FULL`.
-     */
-    acceptDataFormat?: FeedDataFormat;
-    /**
-     * Event fields to be included in received events.
-     * If not specified, the channel will use the default value.
-     * If specified as an empty array, the channel will try to send events with default fields.
-     */
-    acceptEventFields?: FeedEventFields;
-}
-/**
- * Configuration of the feed channel.
- */
-export interface FeedConfig {
-    /**
-     * Aggregation period in seconds.
-     * @example 0.5 - 500 milliseconds.
-     * @default `NaN`
-     * @see {FeedAcceptConfig.acceptAggregationPeriod}
-     */
-    readonly aggregationPeriod: number;
-    /**
-     * Data format to be used for received events.
-     * @example `FULL` - object with keys and values.
-     * @example `COMPACT` - array of values.
-     * @default `FULL`
-     * @see {FeedAcceptConfig.acceptDataFormat}
-     */
-    readonly dataFormat: FeedDataFormat;
-    /**
-     * Event fields to be included in received events.
-     * You can specify fields for all event types or for specific event types @see {FeedAcceptConfig.acceptEventFields}.
-     * @example ```json
-     * { "Quote": ["eventSymbol", "askPrice", "bidPrice"] }
-     * ```
-     * @default `{}`
-     */
-    readonly eventFields: FeedEventFields;
-}
-/**
- * Listner for the feed channel config changes.
- */
-export type DXLinkFeedConfigChangeListner = (config: FeedConfig) => void;
-/**
- * Subscription type by the contract.
- */
-export type SubscriptionByContract = {
-    [FeedContract.AUTO]: Subscription | TimeSeriesSubscription | IndexedEventSubscription;
-    [FeedContract.TICKER]: Subscription;
-    [FeedContract.HISTORY]: TimeSeriesSubscription | IndexedEventSubscription;
-    [FeedContract.STREAM]: Subscription | TimeSeriesSubscription | IndexedEventSubscription;
-};
-/**
- * Listner for the feed channel events received from the channel.
- */
-export type DXLinkFeedEventListner = (event: FeedEventData[]) => void;
-/**
- * dxLink FEED service instance for the specified {@link FeedContract}.
- */
-export interface DXLinkFeed<Contract extends FeedContract = FeedContract.AUTO> {
-    /**
-     * Unique identifier of the feed channel.
-     */
-    readonly id: number;
-    /**
-     * Contract of the feed channel.
-     * @see {FeedContract}
-     */
-    readonly contract: Contract;
-    /**
-     * Get current channel of the feed.
-     * Note: inaproppriate usage of the channel can lead to unexpected behavior.
-     * @see {DXLinkChannel}
-     */
-    getChannel(): DXLinkChannel;
-    /**
-     * Configure desired configuration of the feed channel.
-     * @see {FeedAcceptConfig}
-     */
-    configure(acceptConfig: FeedAcceptConfig): void;
-    /**
-     * Get current configuration of the feed channel as received from the channel.
-     */
-    getConfig(): FeedConfig;
-    /**
-     * Add a listener for the feed channel config changes.
-     */
-    addConfigChangeListener(listener: DXLinkFeedConfigChangeListner): void;
-    /**
-     * Remove a listener for the feed channel config changes.
-     */
-    removeConfigChangeListener(listener: DXLinkFeedConfigChangeListner): void;
-    /**
-     * Add subscriptions to the feed channel.
-     * @param subscriptions - Subscriptions to be added.
-     */
-    addSubscriptions(subscriptions: SubscriptionByContract[Contract][]): void;
-    /**
-     * Add subscriptions to the feed channel.
-     * @param subscriptions - Subscriptions to be added.
-     */
-    addSubscriptions(...subscriptions: SubscriptionByContract[Contract][]): void;
-    /**
-     * Remove subscriptions from the feed channel.
-     * @param subscriptions - Subscriptions to be removed.
-     */
-    removeSubscriptions(subscriptions: SubscriptionByContract[Contract][]): void;
-    /**
-     * Remove subscriptions from the feed channel.
-     * @param subscriptions - Subscriptions to be removed.
-     */
-    removeSubscriptions(...subscriptions: SubscriptionByContract[Contract][]): void;
-    /**
-     * Remove all active subscriptions from the feed channel.
-     */
-    clearSubscriptions(): void;
-    /**
-     * Add a listener for the feed channel events received from the channel.
-     */
-    addEventListener(listener: DXLinkFeedEventListner): void;
-    /**
-     * Remove a listener for the feed channel events received from the channel.
-     */
-    removeEventListener(listener: DXLinkFeedEventListner): void;
-    /**
-     * Close the feed channel.
-     */
-    close(): void;
-}
-/**
- * Options for the {@link DXLinkFeedImpl} instance.
- */
-export interface DXLinkFeedOptions {
-    /**
-     * Time in milliseconds to wait for more pending subscriptions before sending them to the channel.
-     */
-    batchSubscriptionsTime: number;
-    /**
-     * Maximum size of the subscription chunk to be sent to the channel.
-     */
-    maxSendSubscriptionChunkSize: number;
-    /**
-     * Log level for the feed.
-     */
-    logLevel: DXLinkLogLevel;
-}
-export declare class DXLinkFeedImpl<Contract extends FeedContract> implements DXLinkFeed<Contract> {
-    readonly contract: Contract;
-    readonly id: number;
-    private readonly options;
-    /**
-     * dxLink channel instance.
-     */
-    private readonly channel;
-    /**
-     * Current accept config of the feed channel.
-     */
-    private acceptConfig;
-    /**
-     * Current config of the feed channel.
-     */
-    private config;
-    private readonly configListeners;
-    private readonly eventListeners;
-    /**
-     * Pending add subscriptions to be sent to the channel.
-     */
-    private readonly pendingAdd;
-    /**
-     * Pending remove subscriptions to be sent to the channel.
-     */
-    private readonly pendingRemove;
-    /**
-     * Pending reset flag to be sent to the channel.
-     */
-    private pengingReset;
-    /**
-     * List of active subscriptions.
-     * Used to avoid sending the same subscription twice and re-subscribe on the channel re-open.
-     */
-    private readonly subscriptions;
-    /**
-     * List of event types which schema was sent to the channel.
-     */
-    private readonly touchedEvents;
-    /**
-     * Timeout identifier for the {@link scheduleProcessPendings} method.
-     */
-    private scheduleTimeoutId;
-    private readonly logger;
-    /**
-     * Allows to create {@link DXLinkFeed} instance with the specified {@link FeedContract} for the given {@link DXLinkWebSocketClient}.
-     */
-    constructor(client: DXLinkWebSocketClient, contract: Contract, options?: Partial<DXLinkFeedOptions>);
-    getChannel: () => DXLinkChannel;
-    getState: () => DXLinkChannelState;
-    addStateChangeListener: (listener: DXLinkChannelStateChangeListener) => void;
-    removeStateChangeListener: (listener: DXLinkChannelStateChangeListener) => void;
-    getConfig: () => FeedConfig;
-    addConfigChangeListener: (listener: DXLinkFeedConfigChangeListner) => Set<DXLinkFeedConfigChangeListner>;
-    removeConfigChangeListener: (listener: DXLinkFeedConfigChangeListner) => boolean;
-    close: () => void;
-    configure: (acceptConfig: FeedAcceptConfig) => void;
-    addSubscriptions(subscriptions: SubscriptionByContract[Contract][]): void;
-    addSubscriptions(...subscriptions: SubscriptionByContract[Contract][]): void;
-    removeSubscriptions(subscriptions: SubscriptionByContract[Contract][]): void;
-    removeSubscriptions(...subscriptions: SubscriptionByContract[Contract][]): void;
-    clearSubscriptions: () => void;
-    addEventListener: (listener: DXLinkFeedEventListner) => Set<DXLinkFeedEventListner>;
-    removeEventListener: (listener: DXLinkFeedEventListner) => boolean;
-    /**
-     * Clean the subscription from the fields which are not allowed for the specified contract.
-     * Note: coze of the TypeScript limitations, we need to clean the subscription from the fields which are not allowed for the specified contract.
-     */
-    private cleanSubscription;
-    /**
-     * Process message received in the channel.
-     */
-    private processMessage;
-    /**
-     * Process config received from the channel.
-     */
-    private processConfig;
-    /**
-     * Parse data received from the channel.
-     */
-    private parseEventData;
-    /**
-     * Process data received from the channel.
-     */
-    private processData;
-    /**
-     * Process channel status changes from the channel.
-     */
-    private processStatus;
-    /**
-     * Send the subscription chunk to the channel.
-     * @param chunk Subscription chunk to be sent to the channel.
-     * @param newTouchedEvents List of event types which schema should be sent to the channel before the chunk.
-     * @returns
-     */
-    private sendSubscriptionChunkAndSchema;
-    /**
-     * Process error received from the channel.
-     */
-    private processError;
-    /**
-     * Resubscribe to the feed channel subscriptions after the channel re-open.
-     */
-    private resubscribe;
-    /**
-     * Schedule sending pending subscriptions to the channel to batch them together to reduce the number of messages.
-     */
-    private scheduleProcessPendings;
-    /**
-     * Process pending subscriptions and send them to the channel.
-     */
-    private processPendings;
-    /**
-     * Send the `FEED_SETUP` message to the channel with the event fields for the specified event types.
-     * @param eventTypes List of event type fields to be sent to the channel.
-     * @param force If `true`, the config will be sent to the channel even if there is no event fields to send.
-     */
-    private sendAcceptConfig;
-}

build/scheduler.d.ts

-/**
- * Scheduler for scheduling callbacks.
- * @internal
- */
-export declare class Scheduler {
-    private timeoutIds;
-    schedule: (callback: () => void, timeout: number, key: string) => string;
-    cancel: (key: string) => void;
-    clear: () => void;
-}

New alerts

Major refactor

Supply chain risk

Package has recently undergone a major refactor. It may be unstable or indicate significant internal changes. Use caution when updating to versions that include significant changes.

Worsened metrics

Total package byte prevSize

132107

-13.12%

Number of package files

14

-30%

Lines of code

428

-62.49%

Number of medium supply chain risk alerts

1

Infinity%

Dependency changes

• + Added

  @dxfeed/dxlink-core@0.4.0
  (transitive)

• - Removed

  @dxfeed/dxlink-core@0.3.0
  (transitive)

• Updated

  @dxfeed/dxlink-core@0.4.0