fix(VSCode): Provide timeout and fallback for KaotoEditorFactory

Currently, VSCode Kaoto build with the main branch is broken due to a
missing API implementation that causes for a `promise` to hold forever,
preventing the extension to load.

The fix is to provide a `timeout` mechanism to unblock the promise, plus
a `fallback` mechanism to get sensitive settings default to continue the
extension bootstrap process.

packages/ui/src/multiplying-architecture/KaotoEditorFactory.ts

@@ -4,8 +4,8 @@ import {
   EditorInitArgs,
   KogitoEditorEnvelopeContextType,
 } from '@kie-tools-core/editor/dist/api';
-import { DefaultSettingsAdapter } from '../models';
-import { CatalogSchemaLoader, isDefined } from '../utils';
+import { DefaultSettingsAdapter, ISettingsModel, SettingsModel } from '../models';
+import { CatalogSchemaLoader, isDefined, promiseTimeout } from '../utils';
 import { KaotoEditorApp } from './KaotoEditorApp';
 import { KaotoEditorChannelApi } from './KaotoEditorChannelApi';
 
@@ -14,13 +14,40 @@ export class KaotoEditorFactory implements EditorFactory<Editor, KaotoEditorChan
     envelopeContext: KogitoEditorEnvelopeContextType<KaotoEditorChannelApi>,
     initArgs: EditorInitArgs,
   ): Promise<Editor> {
-    const settings = await envelopeContext.channelApi.requests.getVSCodeKaotoSettings();
+    const settings = await this.getSettings(envelopeContext);
+
     const settingsAdapter = new DefaultSettingsAdapter(settings);
     this.updateCatalogUrl(settingsAdapter, initArgs);
 
     return Promise.resolve(new KaotoEditorApp(envelopeContext, initArgs, settingsAdapter));
   }
 
+  /**
+   * Get the settings from the envelope context
+   */
+  private async getSettings(
+    envelopeContext: KogitoEditorEnvelopeContextType<KaotoEditorChannelApi>,
+  ): Promise<ISettingsModel> {
+    let settings: ISettingsModel;
+
+    try {
+      /**
+       * For non-implemented API methods, the promises won't resolve, for that reason
+       * we use a timeout to reject the promise and fallback to the previous API
+       */
+      settings = await promiseTimeout(envelopeContext.channelApi.requests.getVSCodeKaotoSettings(), 500);
+    } catch (error) {
+      /**
+       * Reaching this point means that the new API is not available yet,
+       * so we fallback to the previous API
+       */
+      const catalogUrl = await envelopeContext.channelApi.requests.getCatalogURL();
+      settings = new SettingsModel({ catalogUrl });
+    }
+
+    return settings;
+  }
+
   /**
    * Updates the catalog URL in the settings if it is not defined, to include the embedded catalog.
    * It uses the resourcesPathPrefix from the initArgs to build the default catalog URL.

packages/ui/src/utils/index.ts

@@ -12,6 +12,7 @@ export * from './set-value';
 export * from './get-custom-schema-from-kamelet';
 export * from './update-kamelet-from-custom-schema';
 export * from './pipe-custom-schema';
+export * from './promise-timeout';
 export * from './get-field-groups';
 export * from './get-serialized-model';
 export * from './get-user-updated-properties-schema';

packages/ui/src/utils/promise-timeout.test.ts

@@ -0,0 +1,54 @@
+import { promiseTimeout } from './promise-timeout';
+
+describe('promiseTimeout', () => {
+  beforeAll(() => {
+    jest.useFakeTimers();
+  });
+
+  afterAll(() => {
+    jest.useRealTimers();
+  });
+
+  it('should resolve the promise if it resolves before the timeout', async () => {
+    const promise = Promise.resolve('foo');
+    const result = await promiseTimeout(promise, 1_000);
+
+    expect(result).toBe('foo');
+  });
+
+  it('should reject the promise if it rejects before the timeout', async () => {
+    const promise = Promise.reject(new Error('bar'));
+
+    await expect(promiseTimeout(promise, 1_000)).rejects.toThrow('bar');
+  });
+
+  it('should resolve the promise with the defaultValue when provided, if it takes longer than the timeout', async () => {
+    const promise = new Promise((resolve) => {
+      setTimeout(() => {
+        resolve('baz');
+      }, 1_000);
+    });
+
+    const promiseTimeoutResult = promiseTimeout(promise, 500, 'Lighting fast');
+
+    jest.advanceTimersByTime(500);
+
+    const result = await promiseTimeoutResult;
+
+    expect(result).toBe('Lighting fast');
+  });
+
+  it('should reject the promise if it takes longer than the timeout', async () => {
+    const promise = new Promise((resolve) => {
+      setTimeout(() => {
+        resolve('baz');
+      }, 1_000);
+    });
+
+    const promiseTimeoutResult = promiseTimeout(promise, 500);
+
+    jest.advanceTimersByTime(500);
+
+    await expect(promiseTimeoutResult).rejects.toThrow('Promise timed out');
+  });
+});

packages/ui/src/utils/promise-timeout.ts

@@ -0,0 +1,19 @@
+export const promiseTimeout: <T>(promise: Promise<T>, timeout: number, defaultValue?: T) => Promise<T> = <T>(
+  promise: Promise<T>,
+  timeout: number,
+  defaultValue?: T,
+) => {
+  let timer: number;
+
+  const timeoutPromise = new Promise<T>((resolve, reject) => {
+    timer = setTimeout(() => {
+      if (defaultValue !== undefined) resolve(defaultValue);
+
+      reject(new Error('Promise timed out'));
+    }, timeout) as unknown as number;
+  });
+
+  return Promise.race([promise, timeoutPromise]).finally(() => {
+    clearTimeout(timer);
+  });
+};