feat: stub for create dependent features (#4769)

src/lib/__snapshots__/create-config.test.ts.snap

@@ -76,6 +76,7 @@ exports[`should create default config 1`] = `
       "caseInsensitiveInOperators": false,
       "customRootRolesKillSwitch": false,
       "demo": false,
+      "dependentFeatures": false,
       "disableBulkToggle": false,
       "disableNotifications": false,
       "doraMetrics": false,
@@ -114,6 +115,7 @@ exports[`should create default config 1`] = `
       "caseInsensitiveInOperators": false,
       "customRootRolesKillSwitch": false,
       "demo": false,
+      "dependentFeatures": false,
       "disableBulkToggle": false,
       "disableNotifications": false,
       "doraMetrics": false,

src/lib/openapi/index.ts

@@ -158,6 +158,8 @@ import {
     createGroupSchema,
     doraFeaturesSchema,
     projectDoraMetricsSchema,
+    dependentFeatureSchema,
+    createDependentFeatureSchema,
 } from './spec';
 import { IServerOption } from '../types';
 import { mapValues, omitKeys } from '../util';
@@ -375,6 +377,8 @@ export const schemas: UnleashSchemas = {
     createFeatureNamingPatternSchema,
     doraFeaturesSchema,
     projectDoraMetricsSchema,
+    dependentFeatureSchema,
+    createDependentFeatureSchema,
 };
 
 // Remove JSONSchema keys that would result in an invalid OpenAPI spec.

src/lib/openapi/spec/create-dependent-feature-schema.ts

@@ -0,0 +1,35 @@
+import { FromSchema } from 'json-schema-to-ts';
+
+export const createDependentFeatureSchema = {
+    $id: '#/components/schemas/createDependentFeatureSchema',
+    type: 'object',
+    description: 'Feature dependency on a parent feature in write model',
+    required: ['feature'],
+    properties: {
+        feature: {
+            type: 'string',
+            description: 'The name of the feature we depend on.',
+            example: 'parent_feature',
+        },
+        enabled: {
+            type: 'boolean',
+            description:
+                'Whether the parent feature should be enabled. When `false` variants are ignored. `true` by default.',
+            example: false,
+        },
+        variants: {
+            type: 'array',
+            description:
+                'The list of variants the parent feature should resolve to. Leave empty when you only want to check the `enabled` status.',
+            items: {
+                type: 'string',
+            },
+            example: ['variantA', 'variantB'],
+        },
+    },
+    components: {},
+} as const;
+
+export type CreateDependentFeatureSchema = FromSchema<
+    typeof createDependentFeatureSchema
+>;

src/lib/openapi/spec/dependent-feature-schema.ts

@@ -0,0 +1,14 @@
+import { FromSchema } from 'json-schema-to-ts';
+import { createDependentFeatureSchema } from './create-dependent-feature-schema';
+
+export const dependentFeatureSchema = {
+    $id: '#/components/schemas/dependentFeatureSchema',
+    type: 'object',
+    description: 'Feature dependency on a parent feature in read model',
+    required: ['feature'],
+    additionalProperties: false,
+    properties: createDependentFeatureSchema.properties,
+    components: {},
+} as const;
+
+export type DependentFeatureSchema = FromSchema<typeof dependentFeatureSchema>;

src/lib/openapi/spec/index.ts

@@ -157,3 +157,5 @@ export * from './create-group-schema';
 export * from './application-usage-schema';
 export * from './dora-features-schema';
 export * from './project-dora-metrics-schema';
+export * from './dependent-feature-schema';
+export * from './create-dependent-feature-schema';

src/lib/routes/admin-api/project/project-features.ts

@@ -2,18 +2,18 @@ import { Request, Response } from 'express';
 import { applyPatch, Operation } from 'fast-json-patch';
 import Controller from '../../controller';
 import {
-    IUnleashConfig,
-    IUnleashServices,
-    serializeDates,
     CREATE_FEATURE,
     CREATE_FEATURE_STRATEGY,
     DELETE_FEATURE,
     DELETE_FEATURE_STRATEGY,
+    IFlagResolver,
+    IUnleashConfig,
+    IUnleashServices,
     NONE,
+    serializeDates,
     UPDATE_FEATURE,
     UPDATE_FEATURE_ENVIRONMENT,
     UPDATE_FEATURE_STRATEGY,
-    IFlagResolver,
 } from '../../../types';
 import { Logger } from '../../../logger';
 import { extractUsername } from '../../../util';
@@ -42,9 +42,9 @@ import {
     UpdateFeatureStrategySchema,
 } from '../../../openapi';
 import {
-    OpenApiService,
-    FeatureToggleService,
     FeatureTagService,
+    FeatureToggleService,
+    OpenApiService,
 } from '../../../services';
 import { querySchema } from '../../../schema/feature-schema';
 import { BatchStaleSchema } from '../../../openapi/spec/batch-stale-schema';
@@ -52,7 +52,8 @@ import {
     TransactionCreator,
     UnleashTransaction,
 } from '../../../db/transaction';
-import { BadDataError } from '../../../error';
+import { BadDataError, InvalidOperationError } from '../../../error';
+import { CreateDependentFeatureSchema } from '../../../openapi/spec/create-dependent-feature-schema';
 
 interface FeatureStrategyParams {
     projectId: string;
@@ -99,6 +100,7 @@ const PATH_ENV = `${PATH_FEATURE}/environments/:environment`;
 const BULK_PATH_ENV = `/:projectId/bulk_features/environments/:environment`;
 const PATH_STRATEGIES = `${PATH_ENV}/strategies`;
 const PATH_STRATEGY = `${PATH_STRATEGIES}/:strategyId`;
+const PATH_DEPENDENCIES = `${PATH_FEATURE}/dependencies`;
 
 type ProjectFeaturesServices = Pick<
     IUnleashServices,
@@ -297,6 +299,29 @@ export default class ProjectFeaturesController extends Controller {
             ],
         });
 
+        this.route({
+            method: 'post',
+            path: PATH_DEPENDENCIES,
+            handler: this.addFeatureDependency,
+            permission: CREATE_FEATURE,
+            middleware: [
+                openApiService.validPath({
+                    tags: ['Features'],
+                    summary: 'Add a feature dependency.',
+                    description:
+                        'Add a dependency to a parent feature. Each environment will resolve corresponding dependency independently.',
+                    operationId: 'addFeatureDependency',
+                    requestBody: createRequestSchema(
+                        'createDependentFeatureSchema',
+                    ),
+                    responses: {
+                        200: emptyResponse,
+                        ...getStandardResponses(401, 403, 404),
+                    },
+                }),
+            ],
+        });
+
         this.route({
             method: 'get',
             path: PATH_STRATEGY,
@@ -972,6 +997,27 @@ export default class ProjectFeaturesController extends Controller {
         res.status(200).json(updatedStrategy);
     }
 
+    async addFeatureDependency(
+        req: IAuthRequest<FeatureParams, any, CreateDependentFeatureSchema>,
+        res: Response,
+    ): Promise<void> {
+        const { featureName } = req.params;
+        const { variants, enabled, feature } = req.body;
+
+        if (this.config.flagResolver.isEnabled('dependentFeatures')) {
+            await this.featureService.upsertFeatureDependency(featureName, {
+                variants,
+                enabled,
+                feature,
+            });
+            res.status(200).end();
+        } else {
+            throw new InvalidOperationError(
+                'Dependent features are not enabled',
+            );
+        }
+    }
+
     async getFeatureStrategies(
         req: Request<FeatureStrategyParams, any, any, any>,
         res: Response<FeatureStrategySchema[]>,

src/lib/services/feature-toggle-service.ts

@@ -96,6 +96,7 @@ import { ISegmentService } from 'lib/segments/segment-service-interface';
 import { IChangeRequestAccessReadModel } from '../features/change-request-access-service/change-request-access-read-model';
 import { checkFeatureFlagNamesAgainstPattern } from '../features/feature-naming-pattern/feature-naming-validation';
 import { IPrivateProjectChecker } from '../features/private-project/privateProjectCheckerType';
+import { CreateDependentFeatureSchema } from '../openapi';
 
 interface IFeatureContext {
     featureName: string;
@@ -122,6 +123,15 @@ export type FeatureNameCheckResultWithFeaturePattern =
           featureNaming: IFeatureNaming;
       };
 
+export type FeatureDependency =
+    | {
+          parent: string;
+          child: string;
+          enabled: true;
+          variants?: string[];
+      }
+    | { parent: string; child: string; enabled: false };
+
 const oneOf = (values: string[], match: string) => {
     return values.some((value) => value === match);
 };
@@ -2201,6 +2211,27 @@ class FeatureToggleService {
             );
         }
     }
+
+    async upsertFeatureDependency(
+        parentFeature: string,
+        dependentFeature: CreateDependentFeatureSchema,
+    ): Promise<void> {
+        const { enabled, feature, variants } = dependentFeature;
+        const featureDependency: FeatureDependency =
+            enabled === false
+                ? {
+                      parent: parentFeature,
+                      child: feature,
+                      enabled,
+                  }
+                : {
+                      parent: parentFeature,
+                      child: feature,
+                      enabled: true,
+                      variants,
+                  };
+        console.log(featureDependency);
+    }
 }
 
 export default FeatureToggleService;

src/lib/types/experimental.ts

@@ -30,7 +30,8 @@ export type IFlagKey =
     | 'doraMetrics'
     | 'variantTypeNumber'
     | 'accessOverview'
-    | 'privateProjects';
+    | 'privateProjects'
+    | 'dependentFeatures';
 
 export type IFlags = Partial<{ [key in IFlagKey]: boolean | Variant }>;
 
@@ -130,6 +131,10 @@ const flags: IFlags = {
         process.env.UNLEASH_EXPERIMENTAL_DORA_METRICS,
         false,
     ),
+    dependentFeatures: parseEnvVarBoolean(
+        process.env.UNLEASH_EXPERIMENTAL_DEPENDENT_FEATURES,
+        false,
+    ),
     variantTypeNumber: parseEnvVarBoolean(
         process.env.UNLEASH_EXPERIMENTAL_VARIANT_TYPE_NUMBER,
         false,

src/test/e2e/api/admin/project/features.dependencies.e2e.test.ts

@@ -0,0 +1,56 @@
+import { v4 as uuidv4 } from 'uuid';
+import { CreateDependentFeatureSchema } from '../../../../../lib/openapi';
+import {
+    IUnleashTest,
+    setupAppWithCustomConfig,
+} from '../../../helpers/test-helper';
+import dbInit, { ITestDb } from '../../../helpers/database-init';
+import getLogger from '../../../../fixtures/no-logger';
+
+let app: IUnleashTest;
+let db: ITestDb;
+
+beforeAll(async () => {
+    db = await dbInit('feature_dependencies', getLogger);
+    app = await setupAppWithCustomConfig(
+        db.stores,
+        {
+            experimental: {
+                flags: {
+                    strictSchemaValidation: true,
+                    dependentFeatures: true,
+                },
+            },
+        },
+        db.rawDatabase,
+    );
+});
+
+afterAll(async () => {
+    await app.destroy();
+    await db.destroy();
+});
+
+const addFeatureDependency = async (
+    parentFeature: string,
+    payload: CreateDependentFeatureSchema,
+    expectedCode = 200,
+) => {
+    return app.request
+        .post(
+            `/api/admin/projects/default/features/${parentFeature}/dependencies`,
+        )
+        .send(payload)
+        .expect(expectedCode);
+};
+
+test('should add feature dependency', async () => {
+    const parent = uuidv4();
+    const child = uuidv4();
+    await app.createFeature(parent);
+    await app.createFeature(child);
+
+    await addFeatureDependency(parent, {
+        feature: child,
+    });
+});