new-error - npm Package Compare versions

Comparing version 1.0.4 to 1.0.5

build/error-types/BaseError.d.ts

@@ -8,4 +8,4 @@ import ExtendableError from 'es6-error';
     protected _type: string;
-    protected _code: string;
-    protected _subCode: string;
+    protected _code: string | number;
+    protected _subCode: string | number;
     protected _statusCode: any;
@@ -25,3 +25,3 @@ protected _causedBy: any;
      */
-    protected withErrorCode(code: string): this;
+    protected withErrorCode(code: string | number): this;
     /**
@@ -31,4 +31,28 @@ * Set low level error code
      */
-    protected withErrorSubCode(subCode: string): this;
+    protected withErrorSubCode(subCode: string | number): this;
     /**
+     * Returns the status code.
+     */
+    getStatusCode(): any;
+    /**
+     * Returns the high level error code
+     */
+    getCode(): string | number;
+    /**
+     * Returns the low level error code
+     */
+    getSubCode(): string | number;
+    /**
+     * Returns the attached error
+     */
+    getCausedBy(): any;
+    /**
+     * Returns metadata set by withMetadata()
+     */
+    getMetadata(): Record<string, any>;
+    /**
+     * Returns metadata set by withSafeMetadata()
+     */
+    getSafeMetadata(): Record<string, any>;
+    /**
      * Replaces sprintf() flags in an error message, if present.
@@ -35,0 +59,0 @@ * @see https://www.npmjs.com/package/sprintf-js

build/error-types/BaseError.js

@@ -43,2 +43,38 @@ "use strict";
     /**
+     * Returns the status code.
+     */
+    getStatusCode() {
+        return this._statusCode;
+    }
+    /**
+     * Returns the high level error code
+     */
+    getCode() {
+        return this._code;
+    }
+    /**
+     * Returns the low level error code
+     */
+    getSubCode() {
+        return this._subCode;
+    }
+    /**
+     * Returns the attached error
+     */
+    getCausedBy() {
+        return this._causedBy;
+    }
+    /**
+     * Returns metadata set by withMetadata()
+     */
+    getMetadata() {
+        return this._metadata;
+    }
+    /**
+     * Returns metadata set by withSafeMetadata()
+     */
+    getSafeMetadata() {
+        return this._safeMetadata;
+    }
+    /**
      * Replaces sprintf() flags in an error message, if present.
@@ -45,0 +81,0 @@ * @see https://www.npmjs.com/package/sprintf-js

build/index.d.ts

 import { BaseError } from './error-types/BaseError';
 import { ErrorRegistry } from './ErrorRegistry';
-export { BaseError, ErrorRegistry };
+import { IBaseError, SerializedError, SerializedErrorSafe } from './interfaces';
+export { BaseError, ErrorRegistry, IBaseError, SerializedError, SerializedErrorSafe };

build/interfaces.d.ts

@@ -13,3 +13,3 @@ /**
      */
-    code: any;
+    code: string | number;
     /**
@@ -19,3 +19,3 @@ * Protocol-specific status code, such as an HTTP status code. Used as the
      */
-    statusCode?: any;
+    statusCode?: string | number;
 }
@@ -36,7 +36,7 @@ /**
      */
-    subCode?: any;
+    subCode?: string | number;
     /**
      * Protocol-specific status code, such as an HTTP status code.
      */
-    statusCode?: any;
+    statusCode?: string | number;
 }
@@ -54,2 +54,26 @@ /**
     /**
+     * Returns the high level error code
+     */
+    getCode(): string | number;
+    /**
+     * Returns the low level error code
+     */
+    getSubCode(): string | number;
+    /**
+     * Returns the status code.
+     */
+    getStatusCode(): string | number;
+    /**
+     * Returns the attached error
+     */
+    getCausedBy(): any;
+    /**
+     * Returns metadata set by withMetadata()
+     */
+    getMetadata(): Record<string, any>;
+    /**
+     * Returns metadata set by withSafeMetadata()
+     */
+    getSafeMetadata(): Record<string, any>;
+    /**
      * Attach the original error that was thrown, if available
@@ -104,7 +128,7 @@ * @param {Error} error
      */
-    subCode?: any;
+    subCode?: string | number;
     /**
      * Protocol-specific status code, such as an HTTP status code.
      */
-    statusCode?: any;
+    statusCode?: string | number;
     /**
@@ -111,0 +135,0 @@ * User-defined metadata

CHANGELOG.md

@@ -0,1 +1,7 @@
+## 1.0.5 - Fri May 15 2020 20:57:38
+
+**Contributor:** Theo Gravity
+
+- Add getters / more examples / improved docs
+
 ## 1.0.4 - Fri May 15 2020 19:37:42
@@ -2,0 +8,0 @@

package.json

 {
   "name": "new-error",
-  "version": "1.0.4",
+  "version": "1.0.5",
   "description": "A production-grade error creation and serialization library designed for Typescript",
@@ -5,0 +5,0 @@ "main": "build/index.js",

README.md

@@ -30,4 +30,7 @@ # new-error
     - [Create an error without a low-level error](#create-an-error-without-a-low-level-error)
-  - [Instance comparison / `instanceOf` usage](#instance-comparison--instanceof-usage)
-- [Error manipulation](#error-manipulation)
+  - [`instanceOf` / comparisons](#instanceof--comparisons)
+    - [Comparing a custom error](#comparing-a-custom-error)
+    - [Native `instanceof`](#native-instanceof)
+- [Error API](#error-api)
+  - [Getters](#getters)
   - [Attaching errors](#attaching-errors)
@@ -38,5 +41,6 @@ - [Format messages](#format-messages)
     - [Internal metadata](#internal-metadata)
-- [Serializing errors](#serializing-errors)
-  - [Safe serialization](#safe-serialization)
-  - [Internal serialization](#internal-serialization)
+  - [Serializing errors](#serializing-errors)
+    - [Safe serialization](#safe-serialization)
+    - [Internal serialization](#internal-serialization)
+- [Example Express Error Handling](#example-express-error-handling)
 
@@ -113,3 +117,3 @@ <!-- TOC END -->
 // and type check will ensure that the values are valid
-const err = errRegistry.newError('INTERNAL_SERVER_ERROR', 'DATABASE_FAILURE')
+const err = errRegistry.newError('INTERNAL_SERVER_ERROR', 'DATABASE_FAILURE').formatMessage('SQL_1234')
 console.log(err.toJSON())
@@ -126,3 +130,3 @@ ```
   code: 'ERR_INT_500',
-  message: 'There was a database failure, SQL err code %s',
+  message: 'There was a database failure, SQL err code SQL_1234',
   type: 'DATABASE_FAILURE',
@@ -180,4 +184,6 @@ subCode: 'DB_0001',
 
-## Instance comparison / `instanceOf` usage
+## `instanceOf` / comparisons
 
+### Comparing a custom error
+
 Method: `ErrorRegistry#instanceOf(classInstance, highLevelErrorName)`
@@ -196,6 +202,31 @@
 
-# Error manipulation
+### Native `instanceof`
 
+You can also check if the error is custom-built using this check:
+
+```typescript
+import { BaseError } from 'new-error'
+
+function handleError(err) {
+  if (err instanceof BaseError) {
+    // err is a custom error
+  }
+}
+```
+
+# Error API
+
 Except for the serialization methods, all methods are chainable.
 
+Generated errors extend the `BaseError` class, which supplies the manipulation methods.
+
+## Getters
+
+- `BaseError#getCode()`
+- `BaseError#getSubCode()`
+- `BaseError#getStatusCode()`
+- `BaseError#getCausedBy()`
+- `BaseError#getMetadata()`
+- `BaseError#getSafeMetadata()`
+
 ## Attaching errors
@@ -277,5 +308,5 @@
 
-# Serializing errors
+## Serializing errors
 
-## Safe serialization
+### Safe serialization
 
@@ -314,3 +345,3 @@ Method: `BaseError#toJSONSafe(fieldsToOmit = [])`
 
-## Internal serialization
+### Internal serialization
 
@@ -363,1 +394,69 @@ Method: `BaseError#toJSON(fieldsToOmit = [])`
 ```
+
+# Example Express Error Handling
+
+```typescript
+import express from 'express'
+import { ErrorRegistry, BaseError } from 'new-error'
+const app = express()
+const port = 3000
+
+const errors = {
+  INTERNAL_SERVER_ERROR: {
+    className: 'InternalServerError',
+    code: 'ERR_INT_500',
+    statusCode: 500
+  }
+}
+
+const errorCodes = {
+  DATABASE_FAILURE: {
+    message: 'There was a database failure.',
+    subCode: 'DB_0001',
+    statusCode: 500
+  }
+}
+
+const errRegistry = new ErrorRegistry(errors, errorCodes)
+
+// middleware definition
+app.get('/', async (req, res, next) => {
+  try {
+    // simulate a failure
+    throw new Error('SQL issue')
+  } catch (e) {
+    const err = errRegistry.newError('INTERNAL_SERVER_ERROR', 'DATABASE_FAILURE')
+    err.causedBy(err)
+    // errors must be passed to next()
+    // to be caught when using an async middleware
+    return next(err)
+  }
+})
+
+// catch errors
+app.use((err, req, res, next) => {
+  // error was sent from middleware
+  if (err) {
+    // check if the error is a generated one
+    if (err instanceof BaseError) {
+      // get the status code, if the status code is not defined, default to 500
+      res.status(err.getStatusCode() ?? 500)
+      // spit out the error to the client
+      return res.json({
+        err: err.toJSONSafe()
+      })
+    }
+  }
+
+  // no error, proceed
+  next()
+})
+
+app.listen(port, () => console.log(`Example app listening at http://localhost:${port}`))
+```
+
+If you visit `http://localhost:3000`, you'll get a 500 status code, and the following response:
+
+```
+{"err": {"code":"ERR_INT_500","subCode":"DB_0001","statusCode":500,"meta":{}}}
+```

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New author

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Improved metrics

Total package byte prevSize

44081

increased by12.33%

Lines of code

627

increased by15.68%

Number of lines in readme file

454

increased by27.89%

Number of medium supply chain risk alerts

0

decreased by-100%

No dependency changes