fix: add project filter to feature-toggle-list-builder (#5099)

Adds `forProject` filter to FeatureToggleQueryBuilder
Filters playground results for an array of projects

Closes #
[1-1525](https://linear.app/unleash/issue/1-1525/getting-results-for-all-projects-when-defining-a-single-project-in-the)

Signed-off-by: andreas-unleash <andreas@getunleash.ai>

src/lib/features/feature-toggle/feature-toggle-store.ts

@@ -198,6 +198,10 @@ export default class FeatureToggleStore implements IFeatureToggleStore {
             builder.addSelectColumn('df.enabled as parent_enabled');
         }
 
+        if (featureQuery?.project) {
+            builder.forProject(featureQuery.project);
+        }
+
         const rows = await builder.internalQuery.select(
             builder.getSelectColumns(),
         );

src/lib/features/feature-toggle/query-builders/feature-toggle-list-builder.ts

@@ -129,7 +129,11 @@ export class FeatureToggleListBuilder {
                 userId,
             );
         });
-        
+
         return this;
     }
-}
+
+    forProject = (project: string[]) => {
+        this.internalQuery.whereIn('features.project', project);
+    }
+}

src/lib/features/feature-toggle/tests/feature-toggle-store.e2e.test.ts

@@ -1,16 +1,22 @@
 import dbInit from '../../../../test/e2e/helpers/database-init';
 import getLogger from '../../../../test/fixtures/no-logger';
-import { FeatureToggleDTO, IFeatureToggleStore } from '../../../types';
+import {
+    FeatureToggleDTO,
+    IFeatureToggleStore,
+    IProjectStore,
+} from '../../../types';
 
 let stores;
 let db;
 let featureToggleStore: IFeatureToggleStore;
+let projectStore: IProjectStore;
 
 beforeAll(async () => {
     getLogger.setMuteError(true);
     db = await dbInit('feature_toggle_store_serial', getLogger);
     stores = db.stores;
     featureToggleStore = stores.featureToggleStore;
+    projectStore = stores.projectStore;
 });
 
 afterAll(async () => {
@@ -301,5 +307,24 @@ describe('potentially_stale marking', () => {
 
             expect(potentiallyStale).toBeFalsy();
         });
+
+        test('it should filter projects for playground', async () => {
+            await projectStore.create({
+                id: 'MyProject',
+                name: 'MyProject',
+                description: 'MyProject',
+            });
+            await featureToggleStore.create('default', { name: 'featureA' });
+
+            await featureToggleStore.create('MyProject', { name: 'featureB' });
+
+            const playgroundFeatures =
+                await featureToggleStore.getPlaygroundFeatures({
+                    project: ['MyProject'],
+                });
+
+            expect(playgroundFeatures).toHaveLength(1);
+            expect(playgroundFeatures[0].project).toBe('MyProject');
+        });
     });
 });

src/lib/features/playground/playground-service.ts

@@ -101,7 +101,7 @@ export class PlaygroundService {
     ): Promise<AdvancedPlaygroundFeatureEvaluationResult[]> {
         const segments = await this.segmentService.getActive();
 
-        let filteredProjects: typeof projects;
+        let filteredProjects: typeof projects = projects;
         if (this.flagResolver.isEnabled('privateProjects')) {
             const projectAccess =
                 await this.privateProjectChecker.getUserAccessibleProjects(