hook-emitter - npm Package Compare versions

Comparing version 0.1.8 to 0.2.0

dist/index.js

@@ -23,2 +23,3 @@ 'use strict';
 		this._events = new Map();
+		this._links = [];
 	}
@@ -161,2 +162,3 @@
   * @param {Object} type - The event type.
+  * @param {Function} getListeners - A function that returns an array of listeners to compose.
   * @param {Function} [callback] - An optional function to call after all listeners have been fired.
@@ -178,3 +180,9 @@ * @param {Function} [transform] - An function that transforms a result with the original payload.
 		// listeners may change before the hook is called
-		const getListeners = () => this._events.get(type);
+		const getListeners = () => {
+			const listeners = this._events.get(type) || [];
+			const linkedListeners = this._links.map(link => {
+				return link.emitter.events.get((link.prefix || '') + type) || [];
+			});
+			return listeners.concat.apply(listeners, linkedListeners);
+		};
 
@@ -187,3 +195,3 @@ // return the wrapped function
 
-			const listeners = getListeners() || [];
+			const listeners = getListeners();
 
@@ -200,4 +208,6 @@ if (!Array.isArray(listeners)) {
 
-			// clone the listeners
-			const _listeners = callback ? listeners.concat(callback) : listeners.slice();
+			if (callback) {
+				listeners.push(callback);
+			}
+
 			let index = -1;
@@ -219,3 +229,3 @@
 
-				let listener = _listeners[i];
+				let listener = listeners[i];
 				if (!listener) {
@@ -376,4 +386,46 @@ return Promise.resolve(payload);
 	}
+
+	/**
+  * Links all listeners from another hook emitter into this instance. When an
+  * event is emitted, it will notify all of this instance's listeners, then
+  * notify all linked hook emitter's listeners. Same applies to hooked
+  * functions.
+  *
+  * @param {HookEmitter} emitter - A hook emitter to link to.
+  * @param {String} [prefix] - A string to prefix to all emitted event names.
+  * @returns {HookEmitter}
+  * @access public
+  */
+	link(emitter, prefix) {
+		if (!(emitter instanceof HookEmitter)) {
+			throw new TypeError('Expected argument to be a HookEmitter.');
+		}
+
+		this._links.push({ emitter, prefix });
+
+		return this;
+	}
+
+	/**
+  * Unlinks all listeners from another hook emitter from this instance.
+  *
+  * @param {HookEmitter} emitter - A hook emitter to unlink.
+  * @returns {HookEmitter}
+  * @access public
+  */
+	unlink(emitter) {
+		if (!(emitter instanceof HookEmitter)) {
+			throw new TypeError('Expected argument to be a HookEmitter.');
+		}
+
+		for (let i = 0; i < this._links.length; i++) {
+			if (this._links[i].emitter === emitter) {
+				this._links.splice(i--, 1);
+			}
+		}
+
+		return this;
+	}
 }
 exports.HookEmitter = HookEmitter;
 //# sourceMappingURL=index.js.map

package.json

 {
   "name": "hook-emitter",
-  "version": "0.1.8",
+  "version": "0.2.0",
   "description": "Event emitter with support for asynchronous handlers and a sweet function hook mechanism.",
@@ -16,3 +16,3 @@ "main": "./dist/index.js",
     "docs": "gulp docs",
-    "prepublish": "gulp build",
+    "prepublish": "gulp build && npm shrinkwrap",
     "test": "gulp test"
@@ -25,3 +25,3 @@ },
     "babel-eslint": "^5.0.0",
-    "babel-polyfill": "^6.5.0",
+    "babel-polyfill": "^6.7.2",
     "babel-preset-nodejs-lts": "^1.2.1",
@@ -28,0 +28,0 @@ "chai": "^3.5.0",

README.md

@@ -141,2 +141,19 @@ # hook-emitter
 
+#### `link(emitter, prefix)`
+
+Links another `HookEmitter` to this instance. Useful if you have a class that
+extends a `HookEmitter`, then another `HookEmitter` that you want to receive
+the exact same events.
+
+ * `emitter` HookEmitter - The hook emitter to link to this instance.
+ * `prefix` String (optional) - An optional prefix to prepend to the event name
+   being emitted from all linked emitters.
+
+#### `unlink(emitter)`
+
+Unlinks another `HookEmitter` from this instance. It does the opposite of
+`link()`.
+
+ * `emitter` HookEmitter - The hook emitter to unlink.
+
 ## License
@@ -143,0 +160,0 @@

New alerts

NPM Shrinkwrap

Supply chain risk

Package contains a shrinkwrap file. This may allow the package to bypass normal install procedures.

Found 1 instance in 1 package

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.

Found 1 instance in 1 package

Fixed 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.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

138522

increased by311.12%

Number of package files

8

increased by33.33%

Lines of code

3053

increased by878.53%

Number of lines in readme file

196

increased by9.5%

Worsened metrics

Number of high supply chain risk alerts

1

increased byInfinity%

No dependency changes