Move assertion messages into code and deprecate AssertionError

changelog/upgrade-notes.md

@@ -1,5 +1,11 @@
 ## Upgrade notes
 
+### Next version
+
+#### Deprecation of `ol/AssertionError` and error codes
+
+Future versions will no longer throw `ol/AssertionError` with an error `code`. Instead, they will throw `Error` with just the error message.
+
 ### 7.0.0
 
 #### Removal of deprecated properties and methods

src/ol/AssertionError.js

@@ -1,7 +1,66 @@
 /**
  * @module ol/AssertionError
  */
-import {VERSION} from './util.js';
+
+/** @type {Object<number, string>} */
+const messages = {
+  1: 'The view center is not defined',
+  2: 'The view resolution is not defined',
+  3: 'The view rotation is not defined',
+  4: '`image` and `src` cannot be provided at the same time',
+  5: '`imgSize` must be set when `image` is provided',
+  7: '`format` must be set when `url` is set',
+  8: 'Unknown `serverType` configured',
+  9: '`url` must be configured or set using `#setUrl()`',
+  10: 'The default `geometryFunction` can only handle `Point` geometries',
+  11: '`options.featureTypes` must be an Array',
+  12: '`options.geometryName` must also be provided when `options.bbox` is set',
+  13: 'Invalid corner',
+  14: 'Invalid color',
+  15: 'Tried to get a value for a key that does not exist in the cache',
+  16: 'Tried to set a value for a key that is used already',
+  17: '`resolutions` must be sorted in descending order',
+  18: 'Either `origin` or `origins` must be configured, never both',
+  19: 'Number of `tileSizes` and `resolutions` must be equal',
+  20: 'Number of `origins` and `resolutions` must be equal',
+  22: 'Either `tileSize` or `tileSizes` must be configured, never both',
+  24: 'Invalid extent or geometry provided as `geometry`',
+  25: 'Cannot fit empty extent provided as `geometry`',
+  26: 'Features must have an id set',
+  27: 'Features must have an id set',
+  28: '`renderMode` must be `"hybrid"` or `"vector"`',
+  30: 'The passed `feature` was already added to the source',
+  31: 'Tried to enqueue an `element` that was already added to the queue',
+  32: 'Transformation matrix cannot be inverted',
+  33: 'Invalid units',
+  34: 'Invalid geometry layout',
+  36: 'Unknown SRS type',
+  37: 'Unknown geometry type found',
+  38: '`styleMapValue` has an unknown type',
+  39: 'Unknown geometry type',
+  40: 'Expected `feature` to have a geometry',
+  41: 'Expected an `ol/style/Style` or an array of `ol/style/Style.js`',
+  42: 'Question unknown, the answer is 42',
+  43: 'Expected `layers` to be an array or a `Collection`',
+  47: 'Expected `controls` to be an array or an `ol/Collection`',
+  48: 'Expected `interactions` to be an array or an `ol/Collection`',
+  49: 'Expected `overlays` to be an array or an `ol/Collection`',
+  50: '`options.featureTypes` should be an Array',
+  51: 'Either `url` or `tileJSON` options must be provided',
+  52: 'Unknown `serverType` configured',
+  53: 'Unknown `tierSizeCalculation` configured',
+  55: 'The {-y} placeholder requires a tile grid with extent',
+  56: 'mapBrowserEvent must originate from a pointer event',
+  57: 'At least 2 conditions are required',
+  59: 'Invalid command found in the PBF',
+  60: 'Missing or invalid `size`',
+  61: 'Cannot determine IIIF Image API version from provided image information JSON',
+  62: 'A `WebGLArrayBuffer` must either be of type `ELEMENT_ARRAY_BUFFER` or `ARRAY_BUFFER`',
+  64: 'Layer opacity must be a number',
+  66: '`forEachFeatureAtCoordinate` cannot be used on a WebGL layer if the hit detection logic has not been enabled. This is done by providing adequate shaders using the `hitVertexShader` and `hitFragmentShader` properties of `WebGLPointsLayerRenderer`',
+  67: 'A layer can only be added to the map once. Use either `layer.setMap()` or `map.addLayer()`, not both',
+  68: 'A VectorTile source can only be rendered if it has a projection compatible with the view projection',
+};
 
 /**
  * Error object thrown when an assertion failed. This is an ECMA-262 Error,
@@ -13,13 +72,7 @@ class AssertionError extends Error {
    * @param {number} code Error code.
    */
   constructor(code) {
-    const path = VERSION === 'latest' ? VERSION : 'v' + VERSION.split('-')[0];
-    const message =
-      'Assertion failed. See https://openlayers.org/en/' +
-      path +
-      '/doc/errors/#' +
-      code +
-      ' for details.';
+    const message = `Assertion failed. ${messages[code]}.`;
 
     super(message);
 
@@ -29,6 +82,7 @@ class AssertionError extends Error {
      * the version found in the OpenLayers script's header comment if a version
      * other than the latest is used).
      * @type {number}
+     * @deprecated ol/AssertionError and error codes will be removed in v8.0
      * @api
      */
     this.code = code;

test/node/ol/AssertionError.test.js

@@ -1,6 +1,5 @@
 import AssertionError from '../../../src/ol/AssertionError.js';
 import expect from '../expect.js';
-import {VERSION} from '../../../src/ol/util.js';
 
 describe('ol/AssertionError.js', function () {
   it('generates an error', function () {
@@ -10,11 +9,8 @@ describe('ol/AssertionError.js', function () {
 
   it('generates a message with a versioned url', function () {
     const error = new AssertionError(42);
-    const path = VERSION ? VERSION.split('-')[0] : 'latest';
     expect(error.message).to.be(
-      'Assertion failed. See https://openlayers.org/en/' +
-        path +
-        '/doc/errors/#42 for details.'
+      'Assertion failed. Question unknown, the answer is 42.'
     );
   });