feat(backend): PUSH, PUT en DELETE endpoints voor leerpaden aangemaakt.

backend/src/services/learning-paths/learning-path-service.ts

@@ -1,7 +1,7 @@
 import dwengoApiLearningPathProvider from './dwengo-api-learning-path-provider.js';
 import databaseLearningPathProvider from './database-learning-path-provider.js';
 import { envVars, getEnvVar } from '../../util/envVars.js';
-import { LearningObjectNode, LearningPath, LearningPathResponse } from '@dwengo-1/common/interfaces/learning-content';
+import { LearningObjectNode, LearningPath, LearningPathIdentifier, LearningPathResponse } from '@dwengo-1/common/interfaces/learning-content';
 import { Language } from '@dwengo-1/common/util/language';
 import { Group } from '../../entities/assignments/group.entity.js';
 import { LearningPath as LearningPathEntity } from '../../entities/content/learning-path.entity.js';
@@ -12,6 +12,7 @@ import { base64ToArrayBuffer } from '../../util/base64-buffer-conversion.js';
 import { TeacherDTO } from '@dwengo-1/common/interfaces/teacher';
 import { mapToTeacher } from '../../interfaces/teacher.js';
 import { Collection } from '@mikro-orm/core';
+import { NotFoundException } from '../../exceptions/not-found-exception.js';
 
 const userContentPrefix = getEnvVar(envVars.UserContentPrefix);
 const allProviders = [dwengoApiLearningPathProvider, databaseLearningPathProvider];
@@ -105,6 +106,16 @@ const learningPathService = {
         };
     },
 
+    /**
+     * Fetch the learning paths administrated by the teacher with the given username.
+     */
+    async getLearningPathsAdministratedBy(adminUsername: string): Promise<LearningPath[]> {
+        const providerResponses = await Promise.all(
+            allProviders.map(async (provider) => provider.getLearningPathsAdministratedBy(adminUsername))
+        );
+        return providerResponses.flat();
+    },
+
     /**
      * Search learning paths in the data source using the given search string.
      */
@@ -119,12 +130,42 @@ const learningPathService = {
      * Add a new learning path to the database.
      * @param dto Learning path DTO from which the learning path will be created.
      * @param admins Teachers who should become an admin of the learning path.
+     * @param allowReplace If this is set to true and there is already a learning path with the same identifier, it is replaced.
+     * @returns the created learning path.
      */
-    async createNewLearningPath(dto: LearningPath, admins: TeacherDTO[]): Promise<void> {
+    async createNewLearningPath(dto: LearningPath, admins: TeacherDTO[], allowReplace = false): Promise<LearningPathEntity> {
         const repo = getLearningPathRepository();
         const path = mapToLearningPath(dto, admins);
-        await repo.save(path, { preventOverwrite: true });
+        await repo.save(path, { preventOverwrite: allowReplace });
+        return path;
     },
+
+    /**
+     * Deletes the learning path with the given identifier from the database.
+     * @param id Identifier of the learning path to delete.
+     * @returns the deleted learning path.
+     */
+    async deleteLearningPath(id: LearningPathIdentifier): Promise<LearningPathEntity> {
+        const repo = getLearningPathRepository();
+        const deletedPath = await repo.deleteByHruidAndLanguage(id.hruid, id.language);
+        if (deletedPath) {
+            return deletedPath;
+        }
+        throw new NotFoundException("No learning path with the given identifier found.");
+    },
+
+    /**
+     * Returns a list of the usernames of the administrators of the learning path with the given identifier.
+     * @param id The identifier of the learning path whose admins should be fetched.
+     */
+    async getAdmins(id: LearningPathIdentifier): Promise<string[]> {
+        const repo = getLearningPathRepository();
+        const path = await repo.findByHruidAndLanguage(id.hruid, id.language);
+        if (!path) {
+            throw new NotFoundException("No learning path with the given identifier found.");
+        }
+        return path.admins.map(admin => admin.username);
+    }
 };
 
 export default learningPathService;