Merge pull request #259 from SELab-2/feat/endpoints-in-backend-om-eigen-leerpaden-en-leerobjecten-toe-te-voegen-aan-de-databank-#248

feat: Eigen leerpaden en leerobjecten

backend/package.json

@@ -29,6 +29,7 @@
         "cross-env": "^7.0.3",
         "dotenv": "^16.4.7",
         "express": "^5.0.1",
+        "express-fileupload": "^1.5.1",
         "express-jwt": "^8.5.1",
         "gift-pegjs": "^1.0.2",
         "isomorphic-dompurify": "^2.22.0",
@@ -37,9 +38,11 @@
         "jwks-rsa": "^3.1.0",
         "loki-logger-ts": "^1.0.2",
         "marked": "^15.0.7",
+        "mime-types": "^3.0.1",
         "nanoid": "^5.1.5",
         "response-time": "^2.3.3",
         "swagger-ui-express": "^5.0.1",
+        "unzipper": "^0.12.3",
         "uuid": "^11.1.0",
         "winston": "^3.17.0",
         "winston-loki": "^6.1.3"
@@ -48,10 +51,13 @@
         "@mikro-orm/cli": "6.4.12",
         "@types/cors": "^2.8.17",
         "@types/express": "^5.0.0",
+        "@types/express-fileupload": "^1.5.1",
         "@types/js-yaml": "^4.0.9",
+        "@types/mime-types": "^2.1.4",
         "@types/node": "^22.13.4",
         "@types/response-time": "^2.3.8",
         "@types/swagger-ui-express": "^4.1.8",
+        "@types/unzipper": "^0.10.11",
         "globals": "^15.15.0",
         "ts-node": "^10.9.2",
         "tsx": "^4.19.3",

backend/src/controllers/learning-objects.ts

@@ -7,6 +7,9 @@ import { BadRequestException } from '../exceptions/bad-request-exception.js';
 import { NotFoundException } from '../exceptions/not-found-exception.js';
 import { envVars, getEnvVar } from '../util/envVars.js';
 import { FilteredLearningObject, LearningObjectIdentifierDTO, LearningPathIdentifier } from '@dwengo-1/common/interfaces/learning-content';
+import { UploadedFile } from 'express-fileupload';
+import { AuthenticatedRequest } from '../middleware/auth/authenticated-request';
+import { requireFields } from './error-helper.js';
 
 function getLearningObjectIdentifierFromRequest(req: Request): LearningObjectIdentifierDTO {
     if (!req.params.hruid) {
@@ -20,27 +23,35 @@ function getLearningObjectIdentifierFromRequest(req: Request): LearningObjectIde
 }
 
 function getLearningPathIdentifierFromRequest(req: Request): LearningPathIdentifier {
-    if (!req.query.hruid) {
-        throw new BadRequestException('HRUID is required.');
-    }
+    const { hruid, language } = req.params;
+    requireFields({ hruid });
+
     return {
-        hruid: req.params.hruid,
-        language: (req.query.language as Language) || FALLBACK_LANG,
+        hruid,
+        language: (language as Language) || FALLBACK_LANG,
     };
 }
 
 export async function getAllLearningObjects(req: Request, res: Response): Promise<void> {
-    const learningPathId = getLearningPathIdentifierFromRequest(req);
-    const full = req.query.full;
+    if (req.query.admin) {
+        // If the admin query parameter is present, the user wants to have all learning objects with this admin.
+        const learningObjects = await learningObjectService.getLearningObjectsAdministratedBy(req.query.admin as string);
 
-    let learningObjects: FilteredLearningObject[] | string[];
-    if (full) {
-        learningObjects = await learningObjectService.getLearningObjectsFromPath(learningPathId);
+        res.json(learningObjects);
     } else {
-        learningObjects = await learningObjectService.getLearningObjectIdsFromPath(learningPathId);
-    }
+        // Else he/she wants all learning objects on the path specified by the request parameters.
+        const learningPathId = getLearningPathIdentifierFromRequest(req);
+        const full = req.query.full;
 
-    res.json({ learningObjects: learningObjects });
+        let learningObjects: FilteredLearningObject[] | string[];
+        if (full) {
+            learningObjects = await learningObjectService.getLearningObjectsFromPath(learningPathId);
+        } else {
+            learningObjects = await learningObjectService.getLearningObjectIdsFromPath(learningPathId);
+        }
+
+        res.json({ learningObjects: learningObjects });
+    }
 }
 
 export async function getLearningObject(req: Request, res: Response): Promise<void> {
@@ -72,3 +83,32 @@ export async function getAttachment(req: Request, res: Response): Promise<void>
     }
     res.setHeader('Content-Type', attachment.mimeType).send(attachment.content);
 }
+
+export async function handlePostLearningObject(req: AuthenticatedRequest, res: Response): Promise<void> {
+    if (!req.files || !req.files.learningObject) {
+        throw new BadRequestException('No file uploaded');
+    }
+    const learningObject = await learningObjectService.storeLearningObject((req.files.learningObject as UploadedFile).tempFilePath, [
+        req.auth!.username,
+    ]);
+    res.json(learningObject);
+}
+
+export async function handleDeleteLearningObject(req: AuthenticatedRequest, res: Response): Promise<void> {
+    const learningObjectId = getLearningObjectIdentifierFromRequest(req);
+
+    if (!learningObjectId.version) {
+        throw new BadRequestException('When deleting a learning object, a version must be specified.');
+    }
+
+    const deletedLearningObject = await learningObjectService.deleteLearningObject({
+        hruid: learningObjectId.hruid,
+        version: learningObjectId.version,
+        language: learningObjectId.language,
+    });
+    if (deletedLearningObject) {
+        res.json(deletedLearningObject);
+    } else {
+        throw new NotFoundException('Learning object not found');
+    }
+}

backend/src/controllers/learning-paths.ts

@@ -7,51 +7,103 @@ import { BadRequestException } from '../exceptions/bad-request-exception.js';
 import { NotFoundException } from '../exceptions/not-found-exception.js';
 import { Group } from '../entities/assignments/group.entity.js';
 import { getAssignmentRepository, getGroupRepository } from '../data/repositories.js';
+import { AuthenticatedRequest } from '../middleware/auth/authenticated-request.js';
+import { LearningPath, LearningPathIdentifier } from '@dwengo-1/common/interfaces/learning-content';
+import { getTeacher } from '../services/teachers.js';
+import { requireFields } from './error-helper.js';
 
 /**
  * Fetch learning paths based on query parameters.
  */
 export async function getLearningPaths(req: Request, res: Response): Promise<void> {
-    const hruids = req.query.hruid;
-    const themeKey = req.query.theme as string;
-    const searchQuery = req.query.search as string;
-    const language = (req.query.language as string) || FALLBACK_LANG;
-
-    const forGroupNo = req.query.forGroup as string;
-    const assignmentNo = req.query.assignmentNo as string;
-    const classId = req.query.classId as string;
-
-    let forGroup: Group | undefined;
-
-    if (forGroupNo) {
-        if (!assignmentNo || !classId) {
-            throw new BadRequestException('If forGroupNo is specified, assignmentNo and classId must also be specified.');
-        }
-        const assignment = await getAssignmentRepository().findByClassIdAndAssignmentId(classId, parseInt(assignmentNo));
-        if (assignment) {
-            forGroup = (await getGroupRepository().findByAssignmentAndGroupNumber(assignment, parseInt(forGroupNo))) ?? undefined;
-        }
-    }
-
-    let hruidList;
-
-    if (hruids) {
-        hruidList = Array.isArray(hruids) ? hruids.map(String) : [String(hruids)];
-    } else if (themeKey) {
-        const theme = themes.find((t) => t.title === themeKey);
-        if (theme) {
-            hruidList = theme.hruids;
-        } else {
-            throw new NotFoundException(`Theme "${themeKey}" not found.`);
-        }
-    } else if (searchQuery) {
-        const searchResults = await learningPathService.searchLearningPaths(searchQuery, language as Language, forGroup);
-        res.json(searchResults);
-        return;
+    const admin = req.query.admin;
+    if (admin) {
+        const paths = await learningPathService.getLearningPathsAdministratedBy(admin as string);
+        res.json(paths);
     } else {
-        hruidList = themes.flatMap((theme) => theme.hruids);
-    }
+        const hruids = req.query.hruid;
+        const themeKey = req.query.theme as string;
+        const searchQuery = req.query.search as string;
+        const language = (req.query.language as string) || FALLBACK_LANG;
 
-    const learningPaths = await learningPathService.fetchLearningPaths(hruidList, language as Language, `HRUIDs: ${hruidList.join(', ')}`, forGroup);
-    res.json(learningPaths.data);
+        const forGroupNo = req.query.forGroup as string;
+        const assignmentNo = req.query.assignmentNo as string;
+        const classId = req.query.classId as string;
+
+        let forGroup: Group | undefined;
+
+        if (forGroupNo) {
+            if (!assignmentNo || !classId) {
+                throw new BadRequestException('If forGroupNo is specified, assignmentNo and classId must also be specified.');
+            }
+            const assignment = await getAssignmentRepository().findByClassIdAndAssignmentId(classId, parseInt(assignmentNo));
+            if (assignment) {
+                forGroup = (await getGroupRepository().findByAssignmentAndGroupNumber(assignment, parseInt(forGroupNo))) ?? undefined;
+            }
+        }
+
+        let hruidList;
+
+        if (hruids) {
+            hruidList = Array.isArray(hruids) ? hruids.map(String) : [String(hruids)];
+        } else if (themeKey) {
+            const theme = themes.find((t) => t.title === themeKey);
+            if (theme) {
+                hruidList = theme.hruids;
+            } else {
+                throw new NotFoundException(`Theme "${themeKey}" not found.`);
+            }
+        } else if (searchQuery) {
+            const searchResults = await learningPathService.searchLearningPaths(searchQuery, language as Language, forGroup);
+            res.json(searchResults);
+            return;
+        } else {
+            hruidList = themes.flatMap((theme) => theme.hruids);
+        }
+
+        const learningPaths = await learningPathService.fetchLearningPaths(
+            hruidList,
+            language as Language,
+            `HRUIDs: ${hruidList.join(', ')}`,
+            forGroup
+        );
+        res.json(learningPaths.data);
+    }
+}
+
+function postOrPutLearningPath(isPut: boolean): (req: AuthenticatedRequest, res: Response) => Promise<void> {
+    return async (req, res) => {
+        const path = req.body as LearningPath;
+        const { hruid: hruidParam, language: languageParam } = req.params;
+
+        if (isPut) {
+            requireFields({ hruidParam, languageParam, path });
+        }
+
+        const teacher = await getTeacher(req.auth!.username);
+        if (isPut) {
+            if (req.params.hruid !== path.hruid || req.params.language !== path.language) {
+                throw new BadRequestException('id_not_matching_query_params');
+            }
+            await learningPathService.deleteLearningPath({ hruid: path.hruid, language: path.language as Language });
+        }
+        res.json(await learningPathService.createNewLearningPath(path, [teacher]));
+    };
+}
+
+export const postLearningPath = postOrPutLearningPath(false);
+export const putLearningPath = postOrPutLearningPath(true);
+
+export async function deleteLearningPath(req: AuthenticatedRequest, res: Response): Promise<void> {
+    const { hruid, language } = req.params;
+
+    requireFields({ hruid, language });
+
+    const id: LearningPathIdentifier = { hruid, language: language as Language };
+    const deletedPath = await learningPathService.deleteLearningPath(id);
+    if (deletedPath) {
+        res.json(deletedPath);
+    } else {
+        throw new NotFoundException('The learning path could not be found.');
+    }
 }

backend/src/data/content/learning-object-repository.ts

@@ -12,7 +12,7 @@ export class LearningObjectRepository extends DwengoEntityRepository<LearningObj
                 version: identifier.version,
             },
             {
-                populate: ['keywords'],
+                populate: ['keywords', 'admins'],
             }
         );
     }
@@ -31,4 +31,23 @@ export class LearningObjectRepository extends DwengoEntityRepository<LearningObj
             }
         );
     }
+
+    public async findAllByAdmin(adminUsername: string): Promise<LearningObject[]> {
+        return this.find(
+            {
+                admins: {
+                    username: adminUsername,
+                },
+            },
+            { populate: ['admins'] } // Make sure to load admin relations
+        );
+    }
+
+    public async removeByIdentifier(identifier: LearningObjectIdentifier): Promise<LearningObject | null> {
+        const learningObject = await this.findByIdentifier(identifier);
+        if (learningObject) {
+            await this.em.removeAndFlush(learningObject);
+        }
+        return learningObject;
+    }
 }

backend/src/data/content/learning-path-repository.ts

@@ -4,11 +4,10 @@ import { Language } from '@dwengo-1/common/util/language';
 import { LearningPathNode } from '../../entities/content/learning-path-node.entity.js';
 import { RequiredEntityData } from '@mikro-orm/core';
 import { LearningPathTransition } from '../../entities/content/learning-path-transition.entity.js';
-import { EntityAlreadyExistsException } from '../../exceptions/entity-already-exists-exception.js';
 
 export class LearningPathRepository extends DwengoEntityRepository<LearningPath> {
     public async findByHruidAndLanguage(hruid: string, language: Language): Promise<LearningPath | null> {
-        return this.findOne({ hruid: hruid, language: language }, { populate: ['nodes', 'nodes.transitions'] });
+        return this.findOne({ hruid: hruid, language: language }, { populate: ['nodes', 'nodes.transitions', 'admins'] });
     }
 
     /**
@@ -24,7 +23,21 @@ export class LearningPathRepository extends DwengoEntityRepository<LearningPath>
                 language: language,
                 $or: [{ title: { $like: `%${query}%` } }, { description: { $like: `%${query}%` } }],
             },
-            populate: ['nodes', 'nodes.transitions'],
+            populate: ['nodes', 'nodes.transitions', 'admins'],
+        });
+    }
+
+    /**
+     * Returns all learning paths which have the user with the given username as an administrator.
+     */
+    public async findAllByAdminUsername(adminUsername: string): Promise<LearningPath[]> {
+        return this.findAll({
+            where: {
+                admins: {
+                    username: adminUsername,
+                },
+            },
+            populate: ['nodes', 'nodes.transitions', 'admins'],
         });
     }
 
@@ -36,18 +49,15 @@ export class LearningPathRepository extends DwengoEntityRepository<LearningPath>
         return this.em.create(LearningPathTransition, transitionData);
     }
 
-    public async saveLearningPathNodesAndTransitions(
-        path: LearningPath,
-        nodes: LearningPathNode[],
-        transitions: LearningPathTransition[],
-        options?: { preventOverwrite?: boolean }
-    ): Promise<void> {
-        if (options?.preventOverwrite && (await this.findOne(path))) {
-            throw new EntityAlreadyExistsException('A learning path with this hruid/language combination already exists.');
+    /**
+     * Deletes the learning path with the given hruid and language.
+     * @returns the deleted learning path or null if it was not found.
+     */
+    public async deleteByHruidAndLanguage(hruid: string, language: Language): Promise<LearningPath | null> {
+        const path = await this.findByHruidAndLanguage(hruid, language);
+        if (path) {
+            await this.em.removeAndFlush(path);
         }
-        const em = this.getEntityManager();
-        await em.persistAndFlush(path);
-        await Promise.all(nodes.map(async (it) => em.persistAndFlush(it)));
-        await Promise.all(transitions.map(async (it) => em.persistAndFlush(it)));
+        return path;
     }
 }

backend/src/entities/content/attachment.entity.ts

@@ -9,6 +9,7 @@ export class Attachment {
     @ManyToOne({
         entity: () => LearningObject,
         primary: true,
+        deleteRule: 'cascade',
     })
     learningObject!: LearningObject;
 

backend/src/entities/content/learning-object.entity.ts

@@ -1,4 +1,4 @@
-import { ArrayType, Embedded, Entity, Enum, ManyToMany, OneToMany, PrimaryKey, Property } from '@mikro-orm/core';
+import { ArrayType, Collection, Embedded, Entity, Enum, ManyToMany, OneToMany, PrimaryKey, Property } from '@mikro-orm/core';
 import { Attachment } from './attachment.entity.js';
 import { Teacher } from '../users/teacher.entity.js';
 import { DwengoContentType } from '../../services/learning-objects/processing/content-type.js';
@@ -28,7 +28,7 @@ export class LearningObject {
     @ManyToMany({
         entity: () => Teacher,
     })
-    admins!: Teacher[];
+    admins: Collection<Teacher> = new Collection<Teacher>(this);
 
     @Property({ type: 'string' })
     title!: string;
@@ -84,7 +84,7 @@ export class LearningObject {
         entity: () => Attachment,
         mappedBy: 'learningObject',
     })
-    attachments: Attachment[] = [];
+    attachments: Collection<Attachment> = new Collection<Attachment>(this);
 
     @Property({ type: 'blob' })
     content!: Buffer;

backend/src/entities/content/learning-path-node.entity.ts

@@ -1,4 +1,4 @@
-import { Collection, Entity, Enum, ManyToOne, OneToMany, PrimaryKey, Property, Rel } from '@mikro-orm/core';
+import { Cascade, Collection, Entity, Enum, ManyToOne, OneToMany, PrimaryKey, Property, Rel } from '@mikro-orm/core';
 import { LearningPath } from './learning-path.entity.js';
 import { LearningPathTransition } from './learning-path-transition.entity.js';
 import { Language } from '@dwengo-1/common/util/language';
@@ -26,7 +26,7 @@ export class LearningPathNode {
     @Property({ type: 'bool' })
     startNode!: boolean;
 
-    @OneToMany({ entity: () => LearningPathTransition, mappedBy: 'node' })
+    @OneToMany({ entity: () => LearningPathTransition, mappedBy: 'node', cascade: [Cascade.ALL] })
     transitions!: Collection<LearningPathTransition>;
 
     @Property({ length: 3 })

backend/src/entities/content/learning-path.entity.ts

@@ -1,4 +1,4 @@
-import { Collection, Entity, Enum, ManyToMany, OneToMany, PrimaryKey, Property } from '@mikro-orm/core';
+import { Cascade, Collection, Entity, Enum, ManyToMany, OneToMany, PrimaryKey, Property } from '@mikro-orm/core';
 import { Teacher } from '../users/teacher.entity.js';
 import { LearningPathRepository } from '../../data/content/learning-path-repository.js';
 import { LearningPathNode } from './learning-path-node.entity.js';
@@ -24,6 +24,6 @@ export class LearningPath {
     @Property({ type: 'blob', nullable: true })
     image: Buffer | null = null;
 
-    @OneToMany({ entity: () => LearningPathNode, mappedBy: 'learningPath' })
+    @OneToMany({ entity: () => LearningPathNode, mappedBy: 'learningPath', cascade: [Cascade.ALL] })
     nodes: Collection<LearningPathNode> = new Collection<LearningPathNode>(this);
 }

backend/src/middleware/auth/checks/learning-object-auth-checks.ts

@@ -0,0 +1,16 @@
+import { Language } from '@dwengo-1/common/util/language';
+import learningObjectService from '../../../services/learning-objects/learning-object-service.js';
+import { AuthenticatedRequest } from '../authenticated-request.js';
+import { AuthenticationInfo } from '../authentication-info.js';
+import { authorize } from './auth-checks.js';
+
+export const onlyAdminsForLearningObject = authorize(async (auth: AuthenticationInfo, req: AuthenticatedRequest) => {
+    const { hruid } = req.params;
+    const { version, language } = req.query;
+    const admins = await learningObjectService.getAdmins({
+        hruid,
+        language: language as Language,
+        version: parseInt(version as string),
+    });
+    return admins.includes(auth.username);
+});

backend/src/middleware/auth/checks/learning-path-auth-checks.ts

@@ -0,0 +1,13 @@
+import { Language } from '@dwengo-1/common/util/language';
+import learningPathService from '../../../services/learning-paths/learning-path-service.js';
+import { AuthenticatedRequest } from '../authenticated-request.js';
+import { AuthenticationInfo } from '../authentication-info.js';
+import { authorize } from './auth-checks.js';
+
+export const onlyAdminsForLearningPath = authorize(async (auth: AuthenticationInfo, req: AuthenticatedRequest) => {
+    const adminsForLearningPath = await learningPathService.getAdmins({
+        hruid: req.params.hruid,
+        language: req.params.language as Language,
+    });
+    return adminsForLearningPath && adminsForLearningPath.includes(auth.username);
+});

backend/src/routes/learning-objects.ts

@@ -1,8 +1,17 @@
 import express from 'express';
-import { getAllLearningObjects, getAttachment, getLearningObject, getLearningObjectHTML } from '../controllers/learning-objects.js';
+import {
+    getAllLearningObjects,
+    getAttachment,
+    getLearningObject,
+    getLearningObjectHTML,
+    handleDeleteLearningObject,
+    handlePostLearningObject,
+} from '../controllers/learning-objects.js';
 import submissionRoutes from './submissions.js';
 import questionRoutes from './questions.js';
-import { authenticatedOnly } from '../middleware/auth/checks/auth-checks.js';
+import fileUpload from 'express-fileupload';
+import { onlyAdminsForLearningObject } from '../middleware/auth/checks/learning-object-auth-checks.js';
+import { authenticatedOnly, teachersOnly } from '../middleware/auth/checks/auth-checks.js';
 
 const router = express.Router();
 
@@ -18,12 +27,20 @@ const router = express.Router();
 // Example 2: http://localhost:3000/learningObject?full=true&hruid=un_artificiele_intelligentie
 router.get('/', authenticatedOnly, getAllLearningObjects);
 
+router.post('/', teachersOnly, fileUpload({ useTempFiles: true }), handlePostLearningObject);
+
 // Parameter: hruid of learning object
 // Query: language
 // Route to fetch data of one learning object based on its hruid
 // Example: http://localhost:3000/learningObject/un_ai7
 router.get('/:hruid', authenticatedOnly, getLearningObject);
 
+// Parameter: hruid of learning object
+// Query: language
+// Route to delete a learning object based on its hruid.
+// Example: http://localhost:3000/learningObject/un_ai7?language=nl&version=1
+router.delete('/:hruid', onlyAdminsForLearningObject, handleDeleteLearningObject);
+
 router.use('/:hruid/submissions', submissionRoutes);
 
 router.use('/:hruid/:version/questions', questionRoutes);

backend/src/routes/learning-paths.ts

@@ -1,6 +1,7 @@
 import express from 'express';
-import { getLearningPaths } from '../controllers/learning-paths.js';
-import { authenticatedOnly } from '../middleware/auth/checks/auth-checks.js';
+import { authenticatedOnly, teachersOnly } from '../middleware/auth/checks/auth-checks.js';
+import { deleteLearningPath, getLearningPaths, postLearningPath, putLearningPath } from '../controllers/learning-paths.js';
+import { onlyAdminsForLearningPath } from '../middleware/auth/checks/learning-path-auth-checks.js';
 
 const router = express.Router();
 
@@ -24,5 +25,9 @@ const router = express.Router();
 // Example: http://localhost:3000/learningPath?theme=kiks
 
 router.get('/', authenticatedOnly, getLearningPaths);
+router.post('/', teachersOnly, postLearningPath);
+
+router.put('/:hruid/:language', onlyAdminsForLearningPath, putLearningPath);
+router.delete('/:hruid/:language', onlyAdminsForLearningPath, deleteLearningPath);
 
 export default router;

backend/src/services/learning-objects/database-learning-object-provider.ts

@@ -109,6 +109,15 @@ const databaseLearningObjectProvider: LearningObjectProvider = {
         );
         return learningObjects.filter((it) => it !== null);
     },
+
+    /**
+     * Returns all learning objects containing the given username as an admin.
+     */
+    async getLearningObjectsAdministratedBy(adminUsername: string): Promise<FilteredLearningObject[]> {
+        const learningObjectRepo = getLearningObjectRepository();
+        const learningObjects = await learningObjectRepo.findAllByAdmin(adminUsername);
+        return learningObjects.map((it) => convertLearningObject(it)).filter((it) => it !== null);
+    },
 };
 
 export default databaseLearningObjectProvider;

backend/src/services/learning-objects/dwengo-api-learning-object-provider.ts

@@ -135,6 +135,13 @@ const dwengoApiLearningObjectProvider: LearningObjectProvider = {
 
         return html;
     },
+
+    /**
+     * Obtain all learning objects who have the user with the given username as an admin.
+     */
+    async getLearningObjectsAdministratedBy(_adminUsername: string): Promise<FilteredLearningObject[]> {
+        return []; // The dwengo database does not contain any learning objects administrated by users.
+    },
 };
 
 export default dwengoApiLearningObjectProvider;

backend/src/services/learning-objects/learning-object-provider.ts

@@ -20,4 +20,9 @@ export interface LearningObjectProvider {
      * Obtain a HTML-rendering of the learning object with the given identifier (as a string).
      */
     getLearningObjectHTML(id: LearningObjectIdentifierDTO): Promise<string | null>;
+
+    /**
+     * Obtain all learning object who have the user with the given username as an admin.
+     */
+    getLearningObjectsAdministratedBy(username: string): Promise<FilteredLearningObject[]>;
 }

backend/src/services/learning-objects/learning-object-service.ts

@@ -3,6 +3,11 @@ import { LearningObjectProvider } from './learning-object-provider.js';
 import { envVars, getEnvVar } from '../../util/envVars.js';
 import databaseLearningObjectProvider from './database-learning-object-provider.js';
 import { FilteredLearningObject, LearningObjectIdentifierDTO, LearningPathIdentifier } from '@dwengo-1/common/interfaces/learning-content';
+import { getLearningObjectRepository, getTeacherRepository } from '../../data/repositories.js';
+import { processLearningObjectZip } from './learning-object-zip-processing-service.js';
+import { LearningObject } from '../../entities/content/learning-object.entity.js';
+import { LearningObjectIdentifier } from '../../entities/content/learning-object-identifier.js';
+import { NotFoundException } from '../../exceptions/not-found-exception.js';
 
 function getProvider(id: LearningObjectIdentifierDTO): LearningObjectProvider {
     if (id.hruid.startsWith(getEnvVar(envVars.UserContentPrefix))) {
@@ -42,6 +47,66 @@ const learningObjectService = {
     async getLearningObjectHTML(id: LearningObjectIdentifierDTO): Promise<string | null> {
         return getProvider(id).getLearningObjectHTML(id);
     },
+
+    /**
+     * Obtain all learning objects administrated by the user with the given username.
+     */
+    async getLearningObjectsAdministratedBy(adminUsername: string): Promise<FilteredLearningObject[]> {
+        return databaseLearningObjectProvider.getLearningObjectsAdministratedBy(adminUsername);
+    },
+
+    /**
+     * Store the learning object in the given zip file in the database.
+     * @param learningObjectPath The path where the uploaded learning object resides.
+     * @param admins The usernames of the users which should be administrators of the learning object.
+     */
+    async storeLearningObject(learningObjectPath: string, admins: string[]): Promise<LearningObject> {
+        const learningObjectRepository = getLearningObjectRepository();
+        const learningObject = await processLearningObjectZip(learningObjectPath);
+
+        if (!learningObject.hruid.startsWith(getEnvVar(envVars.UserContentPrefix))) {
+            learningObject.hruid = getEnvVar(envVars.UserContentPrefix) + learningObject.hruid;
+        }
+
+        // Lookup the admin teachers based on their usernames and add them to the admins of the learning object.
+        const teacherRepo = getTeacherRepository();
+        const adminTeachers = await Promise.all(admins.map(async (it) => teacherRepo.findByUsername(it)));
+        adminTeachers.forEach((it) => {
+            if (it !== null) {
+                learningObject.admins.add(it);
+            }
+        });
+
+        try {
+            await learningObjectRepository.save(learningObject, { preventOverwrite: true });
+        } catch (e: unknown) {
+            learningObjectRepository.getEntityManager().clear();
+            throw e;
+        }
+
+        return learningObject;
+    },
+
+    /**
+     * Deletes the learning object with the given identifier.
+     */
+    async deleteLearningObject(id: LearningObjectIdentifier): Promise<LearningObject | null> {
+        const learningObjectRepository = getLearningObjectRepository();
+        return await learningObjectRepository.removeByIdentifier(id);
+    },
+
+    /**
+     * Returns a list of the usernames of the administrators of the learning object with the given identifier.
+     * @throws NotFoundException if the specified learning object was not found in the database.
+     */
+    async getAdmins(id: LearningObjectIdentifier): Promise<string[]> {
+        const learningObjectRepo = getLearningObjectRepository();
+        const learningObject = await learningObjectRepo.findByIdentifier(id);
+        if (!learningObject) {
+            throw new NotFoundException('learningObjectNotFound');
+        }
+        return learningObject.admins.map((admin) => admin.username);
+    },
 };
 
 export default learningObjectService;

backend/src/services/learning-objects/learning-object-zip-processing-service.ts

@@ -0,0 +1,119 @@
+import unzipper from 'unzipper';
+import mime from 'mime-types';
+import { LearningObject } from '../../entities/content/learning-object.entity.js';
+import { getAttachmentRepository, getLearningObjectRepository } from '../../data/repositories.js';
+import { BadRequestException } from '../../exceptions/bad-request-exception.js';
+import { LearningObjectMetadata } from '@dwengo-1/common/interfaces/learning-content';
+import { DwengoContentType } from './processing/content-type.js';
+import { v4 } from 'uuid';
+
+const METADATA_PATH_REGEX = /.*[/^]metadata\.json$/;
+const CONTENT_PATH_REGEX = /.*[/^]content\.[a-zA-Z]*$/;
+
+/**
+ * Process an uploaded zip file and construct a LearningObject from its contents.
+ * @param filePath Path of the zip file to process.
+ */
+export async function processLearningObjectZip(filePath: string): Promise<LearningObject> {
+    let zip: unzipper.CentralDirectory;
+    try {
+        zip = await unzipper.Open.file(filePath);
+    } catch (_: unknown) {
+        throw new BadRequestException('invalidZip');
+    }
+
+    let metadata: LearningObjectMetadata | undefined = undefined;
+    const attachments: { name: string; content: Buffer }[] = [];
+    let content: Buffer | undefined = undefined;
+
+    if (zip.files.length === 0) {
+        throw new BadRequestException('emptyZip');
+    }
+
+    await Promise.all(
+        zip.files.map(async (file) => {
+            if (file.type !== 'Directory') {
+                if (METADATA_PATH_REGEX.test(file.path)) {
+                    metadata = await processMetadataJson(file);
+                } else if (CONTENT_PATH_REGEX.test(file.path)) {
+                    content = await processFile(file);
+                } else {
+                    attachments.push({
+                        name: file.path,
+                        content: await processFile(file),
+                    });
+                }
+            }
+        })
+    );
+
+    if (!metadata) {
+        throw new BadRequestException('missingMetadata');
+    }
+    if (!content) {
+        throw new BadRequestException('missingIndex');
+    }
+
+    const learningObject = createLearningObject(metadata, content, attachments);
+
+    return learningObject;
+}
+
+function createLearningObject(metadata: LearningObjectMetadata, content: Buffer, attachments: { name: string; content: Buffer }[]): LearningObject {
+    const learningObjectRepo = getLearningObjectRepository();
+    const attachmentRepo = getAttachmentRepository();
+
+    const returnValue = {
+        callbackUrl: metadata.return_value?.callback_url ?? '',
+        callbackSchema: metadata.return_value?.callback_schema ? JSON.stringify(metadata.return_value.callback_schema) : '',
+    };
+
+    if (!metadata.target_ages || metadata.target_ages.length === 0) {
+        throw new BadRequestException('targetAgesMandatory');
+    }
+
+    const learningObject = learningObjectRepo.create({
+        admins: [],
+        available: metadata.available ?? true,
+        content: content,
+        contentType: metadata.content_type as DwengoContentType,
+        copyright: metadata.copyright ?? '',
+        description: metadata.description ?? '',
+        educationalGoals: metadata.educational_goals ?? [],
+        hruid: metadata.hruid,
+        keywords: metadata.keywords,
+        language: metadata.language,
+        license: metadata.license ?? '',
+        returnValue,
+        skosConcepts: metadata.skos_concepts ?? [],
+        teacherExclusive: metadata.teacher_exclusive,
+        title: metadata.title,
+        version: metadata.version,
+        estimatedTime: metadata.estimated_time ?? 1,
+        targetAges: metadata.target_ages ?? [],
+        difficulty: metadata.difficulty ?? 1,
+        uuid: v4(),
+    });
+    const attachmentEntities = attachments.map((it) =>
+        attachmentRepo.create({
+            name: it.name,
+            content: it.content,
+            mimeType: mime.lookup(it.name) || 'text/plain',
+            learningObject,
+        })
+    );
+    attachmentEntities.forEach((it) => {
+        learningObject.attachments.add(it);
+    });
+    return learningObject;
+}
+
+async function processMetadataJson(file: unzipper.File): Promise<LearningObjectMetadata> {
+    const buf = await file.buffer();
+    const content = buf.toString();
+    return JSON.parse(content);
+}
+
+async function processFile(file: unzipper.File): Promise<Buffer> {
+    return await file.buffer();
+}

backend/src/services/learning-paths/database-learning-path-provider.ts

@@ -16,6 +16,9 @@ import { Language } from '@dwengo-1/common/util/language';
 import { Group } from '../../entities/assignments/group.entity';
 import { Collection } from '@mikro-orm/core';
 import { v4 } from 'uuid';
+import { getLogger } from '../../logging/initalize.js';
+
+const logger = getLogger();
 
 /**
  * Fetches the corresponding learning object for each of the nodes and creates a map that maps each node to its
@@ -38,8 +41,13 @@ async function getLearningObjectsForNodes(nodes: Collection<LearningPathNode>):
             )
         )
     );
-    if (Array.from(nullableNodesToLearningObjects.values()).some((it) => it === null)) {
-        throw new Error('At least one of the learning objects on this path could not be found.');
+
+    // Ignore all learning objects that cannot be found such that the rest of the learning path keeps working.
+    for (const [key, value] of nullableNodesToLearningObjects) {
+        if (value === null) {
+            logger.warn(`Learning object ${key.learningObjectHruid}/${key.language}/${key.version} not found!`);
+            nullableNodesToLearningObjects.delete(key);
+        }
     }
     return nullableNodesToLearningObjects as Map<LearningPathNode, FilteredLearningObject>;
 }
@@ -102,7 +110,15 @@ async function convertNode(
                 !personalizedFor || // If we do not want a personalized learning path, keep all transitions
                 isTransitionPossible(trans, optionalJsonStringToObject(lastSubmission?.content)) // Otherwise remove all transitions that aren't possible.
         )
-        .map((trans, i) => convertTransition(trans, i, nodesToLearningObjects));
+        .map((trans, i) => {
+            try {
+                return convertTransition(trans, i, nodesToLearningObjects);
+            } catch (_: unknown) {
+                logger.error(`Transition could not be resolved: ${JSON.stringify(trans)}`);
+                return undefined; // Do not crash on invalid transitions, just ignore them so the rest of the learning path keeps working.
+            }
+        })
+        .filter((it) => it !== undefined);
     return {
         _id: learningObject.uuid,
         language: learningObject.language,
@@ -164,6 +180,7 @@ function convertTransition(
         return {
             _id: String(index), // Retained for backwards compatibility. The index uniquely identifies the transition within the learning path.
             default: false, // We don't work with default transitions but retain this for backwards compatibility.
+            condition: transition.condition,
             next: {
                 _id: nextNode._id ? nextNode._id + index : v4(), // Construct a unique ID for the transition for backwards compatibility.
                 hruid: transition.next.learningObjectHruid,
@@ -198,6 +215,15 @@ const databaseLearningPathProvider: LearningPathProvider = {
         };
     },
 
+    /**
+     * Returns all the learning paths which have the user with the given username as an administrator.
+     */
+    async getLearningPathsAdministratedBy(adminUsername: string): Promise<LearningPath[]> {
+        const repo = getLearningPathRepository();
+        const paths = await repo.findAllByAdminUsername(adminUsername);
+        return await Promise.all(paths.map(async (result, index) => convertLearningPath(result, index)));
+    },
+
     /**
      * Search learning paths in the database using the given search string.
      */

backend/src/services/learning-paths/dwengo-api-learning-path-provider.ts

@@ -74,6 +74,10 @@ const dwengoApiLearningPathProvider: LearningPathProvider = {
 
         return searchResults ?? [];
     },
+
+    async getLearningPathsAdministratedBy(_adminUsername: string) {
+        return []; // Learning paths fetched from the Dwengo API cannot be administrated by a user.
+    },
 };
 
 export default dwengoApiLearningPathProvider;

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

@@ -15,4 +15,9 @@ export interface LearningPathProvider {
      * Search learning paths in the data source using the given search string.
      */
     searchLearningPaths(query: string, language: Language, personalizedFor?: Group): Promise<LearningPath[]>;
+
+    /**
+     * Get all learning paths which have the teacher with the given user as an administrator.
+     */
+    getLearningPathsAdministratedBy(adminUsername: string): Promise<LearningPath[]>;
 }

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 +12,9 @@ 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';
+import { BadRequestException } from '../../exceptions/bad-request-exception.js';
+import learningObjectService from '../learning-objects/learning-object-service.js';
 
 const userContentPrefix = getEnvVar(envVars.UserContentPrefix);
 const allProviders = [dwengoApiLearningPathProvider, databaseLearningPathProvider];
@@ -43,27 +46,24 @@ export function mapToLearningPath(dto: LearningPath, adminsDto: TeacherDTO[]): L
         const fromNode = nodes.find(
             (it) => it.learningObjectHruid === nodeDto.learningobject_hruid && it.language === nodeDto.language && it.version === nodeDto.version
         )!;
-        const transitions = nodeDto.transitions
-            .map((transDto, i) => {
-                const toNode = nodes.find(
-                    (it) =>
-                        it.learningObjectHruid === transDto.next.hruid &&
-                        it.language === transDto.next.language &&
-                        it.version === transDto.next.version
-                );
+        const transitions = nodeDto.transitions.map((transDto, i) => {
+            const toNode = nodes.find(
+                (it) =>
+                    it.learningObjectHruid === transDto.next.hruid && it.language === transDto.next.language && it.version === transDto.next.version
+            );
 
-                if (toNode) {
-                    return repo.createTransition({
-                        transitionNumber: i,
-                        node: fromNode,
-                        next: toNode,
-                        condition: transDto.condition ?? 'true',
-                    });
-                }
-                return undefined;
-            })
-            .filter((it) => it)
-            .map((it) => it!);
+            if (toNode) {
+                return repo.createTransition({
+                    transitionNumber: i,
+                    node: fromNode,
+                    next: toNode,
+                    condition: transDto.condition ?? 'true',
+                });
+            }
+            throw new BadRequestException(
+                `Invalid transition destination: ${JSON.stringify(transDto.next)}: This learning object does not exist in this learning path.`
+            );
+        });
 
         fromNode.transitions = new Collection<LearningPathTransition>(fromNode, transitions);
     });
@@ -105,6 +105,14 @@ 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.
      */
@@ -119,11 +127,67 @@ 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.
+     * @returns the created learning path.
      */
-    async createNewLearningPath(dto: LearningPath, admins: TeacherDTO[]): Promise<void> {
+    async createNewLearningPath(dto: LearningPath, admins: TeacherDTO[]): Promise<LearningPathEntity> {
         const repo = getLearningPathRepository();
+
+        const userContentPrefix = getEnvVar(envVars.UserContentPrefix);
+        if (!dto.hruid.startsWith(userContentPrefix)) {
+            dto.hruid = userContentPrefix + dto.hruid;
+        }
+
         const path = mapToLearningPath(dto, admins);
-        await repo.save(path, { preventOverwrite: true });
+
+        // Verify that all specified learning objects actually exist.
+        const learningObjectsOnPath = await Promise.all(
+            path.nodes.map(async (node) =>
+                learningObjectService.getLearningObjectById({
+                    hruid: node.learningObjectHruid,
+                    language: node.language,
+                    version: node.version,
+                })
+            )
+        );
+        if (learningObjectsOnPath.some((it) => !it)) {
+            throw new BadRequestException('pathContainsNonExistingLearningObjects');
+        }
+
+        try {
+            await repo.save(path, { preventOverwrite: true });
+        } catch (e: unknown) {
+            repo.getEntityManager().clear();
+            throw e;
+        }
+        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);
     },
 };
 

common/src/interfaces/learning-content.ts

@@ -25,8 +25,8 @@ export interface LearningObjectNode {
     language: Language;
     start_node?: boolean;
     transitions: Transition[];
-    created_at: string;
-    updatedAt: string;
+    created_at?: string;
+    updatedAt?: string;
     done?: boolean; // True if a submission exists for this node by the user for whom the learning path is customized.
 }
 
@@ -79,6 +79,8 @@ export interface LearningObjectMetadata {
     target_ages: number[];
     content_type: string; // Markdown, image, etc.
     content_location?: string;
+    copyright?: string;
+    license?: string;
     skos_concepts?: string[];
     return_value?: ReturnValue;
 }

frontend/Dockerfile

@@ -3,22 +3,28 @@ FROM node:22 AS build-stage
 # install simple http server for serving static content
 RUN npm install -g http-server
 
-WORKDIR /app
+WORKDIR /app/dwengo
 
 # Install dependencies
 
 COPY package*.json ./
 COPY ./frontend/package.json ./frontend/
+# Frontend depends on common
+COPY common/package.json ./common/
 
 RUN npm install --silent
 
 # Build the frontend
 
 # Root tsconfig.json
-COPY tsconfig.json ./
-COPY assets ./assets/
+COPY tsconfig.json tsconfig.build.json ./
 
-WORKDIR /app/frontend
+COPY assets ./assets
+COPY common ./common
+
+RUN npm run build --workspace=common
+
+WORKDIR /app/dwengo/frontend
 
 COPY frontend ./
 
@@ -28,8 +34,8 @@ FROM nginx:stable AS production-stage
 
 COPY config/nginx/nginx.conf /etc/nginx/nginx.conf
 
-COPY --from=build-stage /app/assets /usr/share/nginx/html/assets
-COPY --from=build-stage /app/frontend/dist /usr/share/nginx/html
+COPY --from=build-stage /app/dwengo/assets /usr/share/nginx/html/assets
+COPY --from=build-stage /app/dwengo/frontend/dist /usr/share/nginx/html
 
 EXPOSE 8080
 

frontend/package.json

@@ -22,6 +22,7 @@
         "@tanstack/vue-query": "^5.69.0",
         "@vueuse/core": "^13.1.0",
         "axios": "^1.8.2",
+        "json-editor-vue": "^0.18.1",
         "oidc-client-ts": "^3.1.0",
         "rollup": "^4.40.0",
         "uuid": "^11.1.0",

frontend/src/components/BrowseThemes.vue

@@ -5,6 +5,7 @@
     import { AGE_TO_THEMES, THEMESITEMS } from "@/utils/constants.ts";
     import { useThemeQuery } from "@/queries/themes.ts";
     import type { Theme } from "@/data-objects/theme.ts";
+    import authService from "@/services/auth/auth-service";
 
     const props = defineProps({
         selectedTheme: { type: String, required: true },
@@ -33,6 +34,8 @@
             cards.value = themes;
         }
     });
+
+    const isTeacher = computed(() => authService.authState.activeRole === "teacher");
 </script>
 
 <template>
@@ -73,6 +76,23 @@
                     class="fill-height grey-bg-card"
                 />
             </v-col>
+            <v-col
+                v-if="isTeacher"
+                cols="12"
+                sm="6"
+                md="4"
+                lg="4"
+                class="d-flex"
+            >
+                <ThemeCard
+                    path="/my-content"
+                    :is-absolute-path="true"
+                    :title="t('ownLearningContentTitle')"
+                    :description="t('ownLearningContentDescription')"
+                    icon="mdi-pencil"
+                    class="fill-height grey-bg-card"
+                />
+            </v-col>
             <v-col
                 v-for="card in cards"
                 :key="card.key"

frontend/src/components/ButtonWithConfirmation.vue

@@ -0,0 +1,63 @@
+<script setup lang="ts">
+    import { useI18n } from "vue-i18n";
+
+    const props = defineProps<{
+        text: string;
+        prependIcon?: string;
+        appendIcon?: string;
+        confirmQueryText: string;
+        variant?: "flat" | "text" | "elevated" | "tonal" | "outlined" | "plain" | undefined;
+        color?: string;
+        disabled?: boolean;
+    }>();
+
+    const emit = defineEmits<{ (e: "confirm"): void }>();
+
+    const { t } = useI18n();
+
+    function confirm(): void {
+        emit("confirm");
+    }
+</script>
+
+<template>
+    <v-dialog max-width="500">
+        <template v-slot:activator="{ props: activatorProps }">
+            <v-btn
+                v-bind="activatorProps"
+                :text="props.text"
+                :prependIcon="props.prependIcon"
+                :appendIcon="props.appendIcon"
+                :variant="props.variant"
+                :color="color"
+                :disabled="props.disabled"
+            ></v-btn>
+        </template>
+
+        <template v-slot:default="{ isActive }">
+            <v-card :title="t('confirmDialogTitle')">
+                <v-card-text>
+                    {{ props.confirmQueryText }}
+                </v-card-text>
+
+                <v-card-actions>
+                    <v-spacer></v-spacer>
+
+                    <v-btn
+                        :text="t('yes')"
+                        @click="
+                            confirm();
+                            isActive.value = false;
+                        "
+                    ></v-btn>
+                    <v-btn
+                        :text="t('cancel')"
+                        @click="isActive.value = false"
+                    ></v-btn>
+                </v-card-actions>
+            </v-card>
+        </template>
+    </v-dialog>
+</template>
+
+<style scoped></style>

frontend/src/components/MenuBar.vue

@@ -7,8 +7,10 @@
 
     // Import assets
     import dwengoLogo from "../../../assets/img/dwengo-groen-zwart.svg";
+    import { useLocale } from "vuetify";
 
     const { t, locale } = useI18n();
+    const { current: vuetifyLocale } = useLocale();
 
     const role = auth.authState.activeRole;
     const _router = useRouter(); // Zonder '_' gaf dit een linter error voor unused variable
@@ -32,6 +34,7 @@
     // Logic to change the language of the website to the selected language
     function changeLanguage(langCode: string): void {
         locale.value = langCode;
+        vuetifyLocale.value = langCode;
         localStorage.setItem("user-lang", langCode);
     }
 

frontend/src/components/UsingQueryResult.vue

@@ -27,7 +27,7 @@
     <div v-if="isError">
         <v-empty-state
             icon="mdi-alert-circle-outline"
-            :text="errorMessage"
+            :text="t(errorMessage)"
             :title="t('error_title')"
         ></v-empty-state>
     </div>

frontend/src/controllers/base-controller.ts

@@ -37,6 +37,33 @@ export abstract class BaseController {
         return response.data;
     }
 
+    /**
+     * Sends a POST-request with a form-data body with the given file.
+     *
+     * @param path Relative path in the api to send the request to.
+     * @param formFieldName The name of the form field in which the file should be.
+     * @param file The file to upload.
+     * @param queryParams The query parameters.
+     * @returns The response the POST request generated.
+     */
+    protected async postFile<T>(
+        path: string,
+        formFieldName: string,
+        file: File,
+        queryParams?: QueryParams,
+    ): Promise<T> {
+        const formData = new FormData();
+        formData.append(formFieldName, file);
+        const response = await apiClient.post<T>(this.absolutePathFor(path), formData, {
+            params: queryParams,
+            headers: {
+                "Content-Type": "multipart/form-data",
+            },
+        });
+        BaseController.assertSuccessResponse(response);
+        return response.data;
+    }
+
     protected async delete<T>(path: string, queryParams?: QueryParams): Promise<T> {
         const response = await apiClient.delete<T>(this.absolutePathFor(path), { params: queryParams });
         BaseController.assertSuccessResponse(response);

frontend/src/controllers/learning-objects.ts

@@ -14,4 +14,16 @@ export class LearningObjectController extends BaseController {
     async getHTML(hruid: string, language: Language, version: number): Promise<Document> {
         return this.get<Document>(`/${hruid}/html`, { language, version }, "document");
     }
+
+    async getAllAdministratedBy(admin: string): Promise<LearningObject[]> {
+        return this.get<LearningObject[]>("/", { admin });
+    }
+
+    async upload(learningObjectZip: File): Promise<LearningObject> {
+        return this.postFile<LearningObject>("/", "learningObject", learningObjectZip);
+    }
+
+    async deleteLearningObject(hruid: string, language: Language, version: number): Promise<LearningObject> {
+        return this.delete<LearningObject>(`/${hruid}`, { language, version });
+    }
 }

frontend/src/controllers/learning-paths.ts

@@ -1,8 +1,8 @@
 import { BaseController } from "@/controllers/base-controller.ts";
-import { LearningPath } from "@/data-objects/learning-paths/learning-path.ts";
 import type { Language } from "@/data-objects/language.ts";
-import { single } from "@/utils/response-assertions.ts";
-import type { LearningPathDTO } from "@/data-objects/learning-paths/learning-path-dto.ts";
+import { LearningPath } from "@/data-objects/learning-paths/learning-path";
+import { NotFoundException } from "@/exception/not-found-exception";
+import type { LearningPath as LearningPathDTO } from "@dwengo-1/common/interfaces/learning-content";
 
 export class LearningPathController extends BaseController {
     constructor() {
@@ -24,7 +24,10 @@ export class LearningPathController extends BaseController {
             assignmentNo: forGroup?.assignmentNo,
             classId: forGroup?.classId,
         });
-        return LearningPath.fromDTO(single(dtos));
+        if (dtos.length === 0) {
+            throw new NotFoundException("learningPathNotFound");
+        }
+        return LearningPath.fromDTO(dtos[0]);
     }
     async getAllByThemeAndLanguage(theme: string, language: Language): Promise<LearningPath[]> {
         const dtos = await this.get<LearningPathDTO[]>("/", { theme, language });
@@ -36,4 +39,20 @@ export class LearningPathController extends BaseController {
         const dtos = await this.get<LearningPathDTO[]>("/", query);
         return dtos.map((dto) => LearningPath.fromDTO(dto));
     }
+
+    async getAllByAdminRaw(admin: string): Promise<LearningPathDTO[]> {
+        return await this.get<LearningPathDTO[]>("/", { admin });
+    }
+
+    async postLearningPath(learningPath: Partial<LearningPathDTO>): Promise<LearningPathDTO> {
+        return await this.post<LearningPathDTO>("/", learningPath);
+    }
+
+    async putLearningPath(learningPath: Partial<LearningPathDTO>): Promise<LearningPathDTO> {
+        return await this.put<LearningPathDTO>(`/${learningPath.hruid}/${learningPath.language}`, learningPath);
+    }
+
+    async deleteLearningPath(hruid: string, language: string): Promise<LearningPathDTO> {
+        return await this.delete<LearningPathDTO>(`/${hruid}/${language}`);
+    }
 }

frontend/src/data-objects/learning-paths/learning-path-node.ts

@@ -1,5 +1,5 @@
 import type { Language } from "@/data-objects/language.ts";
-import type { LearningPathNodeDTO } from "@/data-objects/learning-paths/learning-path.ts";
+import type { LearningObjectNode as LearningPathNodeDTO } from "@dwengo-1/common/interfaces/learning-content";
 
 export class LearningPathNode {
     public readonly learningobjectHruid: string;
@@ -14,7 +14,7 @@ export class LearningPathNode {
         learningobjectHruid: string;
         version: number;
         language: Language;
-        transitions: { next: LearningPathNode; default: boolean }[];
+        transitions: { next: LearningPathNode; default?: boolean }[];
         createdAt: Date;
         updatedAt: Date;
         done?: boolean;
@@ -22,7 +22,7 @@ export class LearningPathNode {
         this.learningobjectHruid = options.learningobjectHruid;
         this.version = options.version;
         this.language = options.language;
-        this.transitions = options.transitions;
+        this.transitions = options.transitions.map((it) => ({ next: it.next, default: it.default ?? false }));
         this.createdAt = options.createdAt;
         this.updatedAt = options.updatedAt;
         this.done = options.done || false;
@@ -50,8 +50,8 @@ export class LearningPathNode {
                     return undefined;
                 })
                 .filter((it) => it !== undefined),
-            createdAt: new Date(dto.created_at),
-            updatedAt: new Date(dto.updatedAt),
+            createdAt: dto.created_at ? new Date(dto.created_at) : new Date(),
+            updatedAt: dto.updatedAt ? new Date(dto.updatedAt) : new Date(),
             done: dto.done,
         });
     }

frontend/src/data-objects/learning-paths/learning-path.ts

@@ -1,6 +1,6 @@
 import type { Language } from "@/data-objects/language.ts";
 import { LearningPathNode } from "@/data-objects/learning-paths/learning-path-node.ts";
-import type { LearningPathDTO } from "@/data-objects/learning-paths/learning-path-dto.ts";
+import type { LearningObjectNode, LearningPath as LearningPathDTO } from "@dwengo-1/common/interfaces/learning-content";
 
 export interface LearningPathNodeDTO {
     _id: string;
@@ -77,20 +77,26 @@ export class LearningPath {
             hruid: dto.hruid,
             title: dto.title,
             description: dto.description,
-            amountOfNodes: dto.num_nodes,
-            amountOfNodesLeft: dto.num_nodes_left,
+            amountOfNodes: dto.num_nodes ?? dto.nodes.length,
+            amountOfNodesLeft: dto.num_nodes_left ?? dto.nodes.length,
             keywords: dto.keywords.split(" "),
-            targetAges: { min: dto.min_age, max: dto.max_age },
+            targetAges: {
+                min: dto.min_age ?? NaN,
+                max: dto.max_age ?? NaN,
+            },
             startNode: LearningPathNode.fromDTOAndOtherNodes(LearningPath.getStartNode(dto), dto.nodes),
             image: dto.image,
         });
     }
 
-    static getStartNode(dto: LearningPathDTO): LearningPathNodeDTO {
+    static getStartNode(dto: LearningPathDTO): LearningObjectNode {
         const startNodeDtos = dto.nodes.filter((it) => it.start_node === true);
         if (startNodeDtos.length < 1) {
             // The learning path has no starting node -> use the first node.
-            return dto.nodes[0];
+            if (dto.nodes.length > 0) {
+                return dto.nodes[0];
+            }
+            throw new Error("emptyLearningPath");
         } // The learning path has 1 or more starting nodes -> use the first start node.
         return startNodeDtos[0];
     }

frontend/src/i18n/locale/de.json

@@ -135,5 +135,36 @@
     "valid-username": "Bitte geben Sie einen gültigen Benutzernamen ein",
     "creationFailed": "Erstellung fehlgeschlagen, bitte versuchen Sie es erneut",
     "no-assignments": "Derzeit gibt es keine Zuweisungen.",
-    "deadline": "deadline"
+    "deadline": "deadline",
+    "learningObjects": "Lernobjekte",
+    "learningPaths": "Lernpfade",
+    "hruid": "HRUID",
+    "language": "Sprache",
+    "version": "Version",
+    "previewFor": "Vorschau für ",
+    "upload": "Hochladen",
+    "learningObjectUploadTitle": "Lernobjekt hochladen",
+    "uploadFailed": "Hochladen fehlgeschlagen",
+    "invalidZip": "Dies ist keine gültige ZIP-Datei.",
+    "emptyZip": "Diese ZIP-Datei ist leer.",
+    "missingMetadata": "Dieses Lernobjekt enthält keine metadata.json-Datei.",
+    "missingContent": "Dieses Lernobjekt enthält keine content.*-Datei.",
+    "open": "öffnen",
+    "editLearningPath": "Lernpfad bearbeiten",
+    "newLearningPath": "Neuen Lernpfad erstellen",
+    "saveChanges": "Änderungen speichern",
+    "newLearningObject": "Lernobjekt hochladen",
+    "confirmDialogTitle": "Bitte bestätigen",
+    "learningPathDeleteQuery": "Möchten Sie diesen Lernpfad wirklich löschen?",
+    "learningObjectDeleteQuery": "Möchten Sie dieses Lernobjekt wirklich löschen?",
+    "learningPathCantModifyId": "Der HRUID oder die Sprache eines Lernpfads kann nicht geändert werden.",
+    "error": "Fehler",
+    "ownLearningContentTitle": "Eigene Lerninhalte",
+    "ownLearningContentDescription": "Erstellen und verwalten Sie eigene Lernobjekte und Lernpfade. Nur für fortgeschrittene Nutzer.",
+    "learningPathNotFound": "Dieser Lernpfad konnte nicht gefunden werden.",
+    "emptyLearningPath": "Dieser Lernpfad enthält keine Lernobjekte.",
+    "pathContainsNonExistingLearningObjects": "Mindestens eines der in diesem Pfad referenzierten Lernobjekte existiert nicht.",
+    "targetAgesMandatory": "Zielalter müssen angegeben werden.",
+    "hintRemoveIfUnconditionalTransition": "(entfernen, wenn dies ein bedingungsloser Übergang sein soll)",
+    "hintKeywordsSeparatedBySpaces": "Schlüsselwörter durch Leerzeichen getrennt"
 }

frontend/src/i18n/locale/en.json

@@ -135,5 +135,36 @@
     "valid-username": "please enter a valid username",
     "creationFailed": "creation failed, please try again",
     "no-assignments": "There are currently no assignments.",
-    "deadline": "deadline"
+    "deadline": "deadline",
+    "learningObjects": "Learning objects",
+    "learningPaths": "Learning paths",
+    "hruid": "HRUID",
+    "language": "Language",
+    "version": "Version",
+    "previewFor": "Preview for ",
+    "upload": "Upload",
+    "learningObjectUploadTitle": "Upload a learning object",
+    "uploadFailed": "Upload failed",
+    "invalidZip": "This is not a valid zip file.",
+    "emptyZip": "This zip file is empty",
+    "missingMetadata": "This learning object is missing a metadata.json file.",
+    "missingContent": "This learning object is missing a content.* file.",
+    "open": "open",
+    "editLearningPath": "Edit learning path",
+    "newLearningPath": "Create a new learning path",
+    "saveChanges": "Save changes",
+    "newLearningObject": "Upload learning object",
+    "confirmDialogTitle": "Please confirm",
+    "learningPathDeleteQuery": "Are you sure you want to delete this learning path?",
+    "learningObjectDeleteQuery": "Are you sure you want to delete this learning object?",
+    "learningPathCantModifyId": "The HRUID or language of a learning path cannot be modified.",
+    "error": "Error",
+    "ownLearningContentTitle": "Own learning content",
+    "ownLearningContentDescription": "Create and administrate your own learning objects and learning paths. For advanced users only.",
+    "learningPathNotFound": "This learning path could not be found.",
+    "emptyLearningPath": "This learning path does not contain any learning objects.",
+    "pathContainsNonExistingLearningObjects": "At least one of the learning objects referenced in this path does not exist.",
+    "targetAgesMandatory": "Target ages must be specified.",
+    "hintRemoveIfUnconditionalTransition": "(remove this if this should be an unconditional transition)",
+    "hintKeywordsSeparatedBySpaces": "Keywords separated by spaces"
 }

frontend/src/i18n/locale/fr.json

@@ -136,5 +136,36 @@
     "valid-username": "veuillez entrer un nom d'utilisateur valide",
     "creationFailed": "échec de la création, veuillez réessayer",
     "no-assignments": "Il n'y a actuellement aucun travail.",
-    "deadline": "délai"
+    "deadline": "délai",
+    "learningObjects": "Objets d’apprentissage",
+    "learningPaths": "Parcours d’apprentissage",
+    "hruid": "HRUID",
+    "language": "Langue",
+    "version": "Version",
+    "previewFor": "Aperçu de ",
+    "upload": "Téléverser",
+    "learningObjectUploadTitle": "Téléverser un objet d’apprentissage",
+    "uploadFailed": "Échec du téléversement",
+    "invalidZip": "Ce n’est pas un fichier ZIP valide.",
+    "emptyZip": "Ce fichier ZIP est vide.",
+    "missingMetadata": "Il manque un fichier metadata.json à cet objet d’apprentissage.",
+    "missingContent": "Il manque un fichier content.* à cet objet d’apprentissage.",
+    "open": "ouvrir",
+    "editLearningPath": "Modifier le parcours",
+    "newLearningPath": "Créer un nouveau parcours",
+    "saveChanges": "Enregistrer les modifications",
+    "newLearningObject": "Téléverser un objet d’apprentissage",
+    "confirmDialogTitle": "Veuillez confirmer",
+    "learningPathDeleteQuery": "Voulez-vous vraiment supprimer ce parcours d’apprentissage ?",
+    "learningObjectDeleteQuery": "Voulez-vous vraiment supprimer cet objet d’apprentissage ?",
+    "learningPathCantModifyId": "Le HRUID ou la langue d’un parcours ne peuvent pas être modifiés.",
+    "error": "Erreur",
+    "ownLearningContentTitle": "Contenu d’apprentissage personnel",
+    "ownLearningContentDescription": "Créez et gérez vos propres objets et parcours d’apprentissage. Réservé aux utilisateurs avancés.",
+    "learningPathNotFound": "Ce parcours d'apprentissage est introuvable.",
+    "emptyLearningPath": "Ce parcours d'apprentissage ne contient aucun objet d'apprentissage.",
+    "pathContainsNonExistingLearningObjects": "Au moins un des objets d’apprentissage référencés dans ce chemin n’existe pas.",
+    "targetAgesMandatory": "Les âges cibles doivent être spécifiés.",
+    "hintRemoveIfUnconditionalTransition": "(supprimer ceci s’il s’agit d’une transition inconditionnelle)",
+    "hintKeywordsSeparatedBySpaces": "Mots-clés séparés par des espaces"
 }

frontend/src/i18n/locale/nl.json

@@ -135,5 +135,36 @@
     "valid-username": "voer een geldige gebruikersnaam in",
     "creationFailed": "aanmaak mislukt, probeer het opnieuw",
     "no-assignments": "Er zijn momenteel geen opdrachten.",
-    "deadline": "deadline"
+    "deadline": "deadline",
+    "learningObjects": "Leerobjecten",
+    "learningPaths": "Leerpaden",
+    "hruid": "HRUID",
+    "language": "Taal",
+    "version": "Versie",
+    "previewFor": "Voorbeeld van ",
+    "upload": "Uploaden",
+    "learningObjectUploadTitle": "Leerobject uploaden",
+    "uploadFailed": "Upload mislukt",
+    "invalidZip": "Dit is geen geldig zipbestand.",
+    "emptyZip": "Dit zipbestand is leeg.",
+    "missingMetadata": "Dit leerobject mist een metadata.json-bestand.",
+    "missingContent": "Dit leerobject mist een content.*-bestand.",
+    "open": "openen",
+    "editLearningPath": "Leerpad bewerken",
+    "newLearningPath": "Nieuw leerpad aanmaken",
+    "saveChanges": "Wijzigingen opslaan",
+    "newLearningObject": "Leerobject uploaden",
+    "confirmDialogTitle": "Bevestig alstublieft",
+    "learningPathDeleteQuery": "Weet u zeker dat u dit leerpad wilt verwijderen?",
+    "learningObjectDeleteQuery": "Weet u zeker dat u dit leerobject wilt verwijderen?",
+    "learningPathCantModifyId": "De HRUID of taal van een leerpad kan niet worden gewijzigd.",
+    "error": "Fout",
+    "ownLearningContentTitle": "Eigen leerinhoud",
+    "ownLearningContentDescription": "Maak en beheer je eigen leerobjecten en leerpads. Alleen voor gevorderde gebruikers.",
+    "learningPathNotFound": "Dit leerpad kon niet gevonden worden.",
+    "emptyLearningPath": "Dit leerpad bevat geen leerobjecten.",
+    "pathContainsNonExistingLearningObjects": "Ten minste één van de leerobjecten in dit pad bestaat niet.",
+    "targetAgesMandatory": "Doelleeftijden moeten worden opgegeven.",
+    "hintRemoveIfUnconditionalTransition": "(verwijder dit voor onvoorwaardelijke overgangen)",
+    "hintKeywordsSeparatedBySpaces": "Trefwoorden gescheiden door spaties"
 }

frontend/src/main.ts

@@ -7,15 +7,20 @@ import * as components from "vuetify/components";
 import * as directives from "vuetify/directives";
 import i18n from "./i18n/i18n.ts";
 
+// JSON-editor
+import JsonEditorVue from "json-editor-vue";
+
 // Components
 import App from "./App.vue";
 import router from "./router";
 import { aliases, mdi } from "vuetify/iconsets/mdi";
 import { VueQueryPlugin, QueryClient } from "@tanstack/vue-query";
+import { de, en, fr, nl } from "vuetify/locale";
 
 const app = createApp(App);
 
 app.use(router);
+app.use(JsonEditorVue, {});
 
 const link = document.createElement("link");
 link.rel = "stylesheet";
@@ -32,6 +37,11 @@ const vuetify = createVuetify({
             mdi,
         },
     },
+    locale: {
+        locale: i18n.global.locale,
+        fallback: "en",
+        messages: { nl, en, de, fr },
+    },
 });
 
 const queryClient = new QueryClient({

frontend/src/queries/learning-objects.ts

@@ -1,9 +1,16 @@
 import { type MaybeRefOrGetter, toValue } from "vue";
 import type { Language } from "@/data-objects/language.ts";
-import { useQuery, type UseQueryReturnType } from "@tanstack/vue-query";
+import {
+    useMutation,
+    useQuery,
+    useQueryClient,
+    type UseMutationReturnType,
+    type UseQueryReturnType,
+} from "@tanstack/vue-query";
 import { getLearningObjectController } from "@/controllers/controllers.ts";
 import type { LearningObject } from "@/data-objects/learning-objects/learning-object.ts";
 import type { LearningPath } from "@/data-objects/learning-paths/learning-path.ts";
+import type { AxiosError } from "axios";
 
 export const LEARNING_OBJECT_KEY = "learningObject";
 const learningObjectController = getLearningObjectController();
@@ -24,15 +31,15 @@ export function useLearningObjectMetadataQuery(
 }
 
 export function useLearningObjectHTMLQuery(
-    hruid: MaybeRefOrGetter<string>,
-    language: MaybeRefOrGetter<Language>,
-    version: MaybeRefOrGetter<number>,
+    hruid: MaybeRefOrGetter<string | undefined>,
+    language: MaybeRefOrGetter<Language | undefined>,
+    version: MaybeRefOrGetter<number | undefined>,
 ): UseQueryReturnType<Document, Error> {
     return useQuery({
         queryKey: [LEARNING_OBJECT_KEY, "html", hruid, language, version],
         queryFn: async () => {
             const [hruidVal, languageVal, versionVal] = [toValue(hruid), toValue(language), toValue(version)];
-            return learningObjectController.getHTML(hruidVal, languageVal, versionVal);
+            return learningObjectController.getHTML(hruidVal!, languageVal!, versionVal!);
         },
         enabled: () => Boolean(toValue(hruid)) && Boolean(toValue(language)) && Boolean(toValue(version)),
     });
@@ -55,3 +62,49 @@ export function useLearningObjectListForPathQuery(
         enabled: () => Boolean(toValue(learningPath)),
     });
 }
+
+export function useLearningObjectListForAdminQuery(
+    admin: MaybeRefOrGetter<string | undefined>,
+): UseQueryReturnType<LearningObject[], Error> {
+    return useQuery({
+        queryKey: [LEARNING_OBJECT_KEY, "forAdmin", admin],
+        queryFn: async () => {
+            const adminVal = toValue(admin);
+            return await learningObjectController.getAllAdministratedBy(adminVal!);
+        },
+        enabled: () => toValue(admin) !== undefined,
+    });
+}
+
+export function useUploadLearningObjectMutation(): UseMutationReturnType<
+    LearningObject,
+    AxiosError,
+    { learningObjectZip: File },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ learningObjectZip }) => await learningObjectController.upload(learningObjectZip),
+        onSuccess: async () => {
+            await queryClient.invalidateQueries({ queryKey: [LEARNING_OBJECT_KEY, "forAdmin"] });
+        },
+    });
+}
+
+export function useDeleteLearningObjectMutation(): UseMutationReturnType<
+    LearningObject,
+    AxiosError,
+    { hruid: string; language: Language; version: number },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ hruid, language, version }) =>
+            await learningObjectController.deleteLearningObject(hruid, language, version),
+        onSuccess: async () => {
+            await queryClient.invalidateQueries({ queryKey: [LEARNING_OBJECT_KEY, "forAdmin"] });
+        },
+    });
+}

frontend/src/queries/learning-paths.ts

@@ -1,8 +1,16 @@
 import { type MaybeRefOrGetter, toValue } from "vue";
 import type { Language } from "@/data-objects/language.ts";
-import { useQuery, type UseQueryReturnType } from "@tanstack/vue-query";
+import {
+    useMutation,
+    useQuery,
+    useQueryClient,
+    type UseMutationReturnType,
+    type UseQueryReturnType,
+} from "@tanstack/vue-query";
 import { getLearningPathController } from "@/controllers/controllers";
-import type { LearningPath } from "@/data-objects/learning-paths/learning-path.ts";
+import type { AxiosError } from "axios";
+import type { LearningPath as LearningPathDTO } from "@dwengo-1/common/interfaces/learning-content";
+import type { LearningPath } from "@/data-objects/learning-paths/learning-path";
 
 export const LEARNING_PATH_KEY = "learningPath";
 const learningPathController = getLearningPathController();
@@ -33,6 +41,58 @@ export function useGetAllLearningPathsByThemeAndLanguageQuery(
     });
 }
 
+export function useGetAllLearningPathsByAdminQuery(
+    admin: MaybeRefOrGetter<string | undefined>,
+): UseQueryReturnType<LearningPathDTO[], AxiosError> {
+    return useQuery({
+        queryKey: [LEARNING_PATH_KEY, "getAllByAdmin", admin],
+        queryFn: async () => learningPathController.getAllByAdminRaw(toValue(admin)!),
+        enabled: () => Boolean(toValue(admin)),
+    });
+}
+
+export function usePostLearningPathMutation(): UseMutationReturnType<
+    LearningPathDTO,
+    AxiosError,
+    { learningPath: Partial<LearningPathDTO> },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ learningPath }) => learningPathController.postLearningPath(learningPath),
+        onSuccess: async () => queryClient.invalidateQueries({ queryKey: [LEARNING_PATH_KEY] }),
+    });
+}
+
+export function usePutLearningPathMutation(): UseMutationReturnType<
+    LearningPathDTO,
+    AxiosError,
+    { learningPath: Partial<LearningPathDTO> },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ learningPath }) => learningPathController.putLearningPath(learningPath),
+        onSuccess: async () => queryClient.invalidateQueries({ queryKey: [LEARNING_PATH_KEY] }),
+    });
+}
+
+export function useDeleteLearningPathMutation(): UseMutationReturnType<
+    LearningPathDTO,
+    AxiosError,
+    { hruid: string; language: Language },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ hruid, language }) => learningPathController.deleteLearningPath(hruid, language),
+        onSuccess: async () => queryClient.invalidateQueries({ queryKey: [LEARNING_PATH_KEY] }),
+    });
+}
+
 export function useSearchLearningPathQuery(
     query: MaybeRefOrGetter<string | undefined>,
     language: MaybeRefOrGetter<string | undefined>,

frontend/src/router/index.ts

@@ -14,6 +14,7 @@ import UserHomePage from "@/views/homepage/UserHomePage.vue";
 import SingleTheme from "@/views/SingleTheme.vue";
 import LearningObjectView from "@/views/learning-paths/learning-object/LearningObjectView.vue";
 import authService from "@/services/auth/auth-service";
+import OwnLearningContentPage from "@/views/own-learning-content/OwnLearningContentPage.vue";
 import { allowRedirect, Redirect } from "@/utils/redirect.ts";
 
 const router = createRouter({
@@ -106,6 +107,12 @@ const router = createRouter({
             component: SingleDiscussion,
             meta: { requiresAuth: true },
         },
+        {
+            path: "/my-content",
+            name: "OwnLearningContentPage",
+            component: OwnLearningContentPage,
+            meta: { requiresAuth: true },
+        },
         {
             path: "/learningPath",
             children: [

frontend/src/views/learning-paths/LearningPathPage.vue

@@ -250,7 +250,7 @@
                     </template>
                 </v-list-itemF>
                 <v-divider></v-divider>
-                <div v-if="props.learningObjectHruid">
+                <div>
                     <using-query-result
                         :query-result="learningObjectListQueryResult"
                         v-slot="learningObjects: { data: LearningObject[] }"

frontend/src/views/own-learning-content/OwnLearningContentPage.vue

@@ -0,0 +1,81 @@
+<script setup lang="ts">
+    import { useLearningObjectListForAdminQuery } from "@/queries/learning-objects.ts";
+    import OwnLearningObjectsView from "@/views/own-learning-content/learning-objects/OwnLearningObjectsView.vue";
+    import OwnLearningPathsView from "@/views/own-learning-content/learning-paths/OwnLearningPathsView.vue";
+    import authService from "@/services/auth/auth-service.ts";
+    import UsingQueryResult from "@/components/UsingQueryResult.vue";
+    import type { LearningObject } from "@/data-objects/learning-objects/learning-object";
+    import { ref, type Ref } from "vue";
+    import { useI18n } from "vue-i18n";
+    import { useGetAllLearningPathsByAdminQuery } from "@/queries/learning-paths";
+    import type { LearningPath as LearningPathDTO } from "@dwengo-1/common/interfaces/learning-content";
+
+    const { t } = useI18n();
+
+    const learningObjectsQuery = useLearningObjectListForAdminQuery(
+        authService.authState.user?.profile.preferred_username,
+    );
+
+    const learningPathsQuery = useGetAllLearningPathsByAdminQuery(
+        authService.authState.user?.profile.preferred_username,
+    );
+
+    type Tab = "learningObjects" | "learningPaths";
+    const tab: Ref<Tab> = ref("learningObjects");
+</script>
+
+<template>
+    <div class="tab-pane-container">
+        <h1 class="title">{{ t("ownLearningContentTitle") }}</h1>
+
+        <v-tabs v-model="tab">
+            <v-tab value="learningObjects">{{ t("learningObjects") }}</v-tab>
+            <v-tab value="learningPaths">{{ t("learningPaths") }}</v-tab>
+        </v-tabs>
+
+        <v-tabs-window
+            v-model="tab"
+            class="main-content"
+        >
+            <v-tabs-window-item
+                value="learningObjects"
+                class="main-content"
+            >
+                <using-query-result
+                    :query-result="learningObjectsQuery"
+                    v-slot="response: { data: LearningObject[] }"
+                >
+                    <own-learning-objects-view :learningObjects="response.data"></own-learning-objects-view>
+                </using-query-result>
+            </v-tabs-window-item>
+            <v-tabs-window-item value="learningPaths">
+                <using-query-result
+                    :query-result="learningPathsQuery"
+                    v-slot="response: { data: LearningPathDTO[] }"
+                >
+                    <own-learning-paths-view :learningPaths="response.data" />
+                </using-query-result>
+            </v-tabs-window-item>
+        </v-tabs-window>
+    </div>
+</template>
+
+<style scoped>
+    h1 {
+        color: #0e6942;
+        text-transform: uppercase;
+        font-weight: bolder;
+        font-size: 50px;
+    }
+
+    .tab-pane-container {
+        display: flex;
+        flex-direction: column;
+        height: 100%;
+        padding: 20px 30px;
+    }
+    .main-content {
+        flex: 1 1;
+        height: 100%;
+    }
+</style>

frontend/src/views/own-learning-content/learning-objects/LearningObjectPreviewCard.vue

@@ -0,0 +1,59 @@
+<script setup lang="ts">
+    import type { LearningObject } from "@/data-objects/learning-objects/learning-object";
+    import UsingQueryResult from "@/components/UsingQueryResult.vue";
+    import LearningObjectContentView from "../../learning-paths/learning-object/content/LearningObjectContentView.vue";
+    import ButtonWithConfirmation from "@/components/ButtonWithConfirmation.vue";
+    import { useDeleteLearningObjectMutation, useLearningObjectHTMLQuery } from "@/queries/learning-objects";
+    import { useI18n } from "vue-i18n";
+
+    const { t } = useI18n();
+
+    const props = defineProps<{
+        selectedLearningObject?: LearningObject;
+    }>();
+
+    const learningObjectQueryResult = useLearningObjectHTMLQuery(
+        () => props.selectedLearningObject?.key,
+        () => props.selectedLearningObject?.language,
+        () => props.selectedLearningObject?.version,
+    );
+
+    const { isPending, mutate } = useDeleteLearningObjectMutation();
+
+    function deleteLearningObject(): void {
+        if (props.selectedLearningObject) {
+            mutate({
+                hruid: props.selectedLearningObject.key,
+                language: props.selectedLearningObject.language,
+                version: props.selectedLearningObject.version,
+            });
+        }
+    }
+</script>
+
+<template>
+    <v-card
+        v-if="selectedLearningObject"
+        :title="t('previewFor') + selectedLearningObject.title"
+    >
+        <template v-slot:text>
+            <using-query-result
+                :query-result="learningObjectQueryResult"
+                v-slot="response: { data: Document }"
+            >
+                <learning-object-content-view :learning-object-content="response.data"></learning-object-content-view>
+            </using-query-result>
+        </template>
+        <template v-slot:actions>
+            <button-with-confirmation
+                @confirm="deleteLearningObject"
+                prepend-icon="mdi mdi-delete"
+                color="red"
+                :text="t('delete')"
+                :confirmQueryText="t('learningObjectDeleteQuery')"
+            />
+        </template>
+    </v-card>
+</template>
+
+<style scoped></style>

frontend/src/views/own-learning-content/learning-objects/LearningObjectUploadButton.vue

@@ -0,0 +1,82 @@
+<script setup lang="ts">
+    import { useUploadLearningObjectMutation } from "@/queries/learning-objects";
+    import { ref, watch, type Ref } from "vue";
+    import { useI18n } from "vue-i18n";
+    import { VFileUpload } from "vuetify/labs/VFileUpload";
+
+    const { t } = useI18n();
+
+    const dialogOpen = ref(false);
+
+    interface ContainsErrorString {
+        error: string;
+    }
+
+    const fileToUpload: Ref<File | undefined> = ref(undefined);
+
+    const { isPending, error, isError, isSuccess, mutate } = useUploadLearningObjectMutation();
+
+    watch(isSuccess, (newIsSuccess) => {
+        if (newIsSuccess) {
+            dialogOpen.value = false;
+            fileToUpload.value = undefined;
+        }
+    });
+
+    function uploadFile() {
+        if (fileToUpload.value) {
+            mutate({ learningObjectZip: fileToUpload.value });
+        }
+    }
+</script>
+<template>
+    <v-dialog
+        max-width="500"
+        v-model="dialogOpen"
+    >
+        <template v-slot:activator="{ props: activatorProps }">
+            <v-btn
+                prepend-icon="mdi mdi-plus"
+                :text="t('newLearningObject')"
+                v-bind="activatorProps"
+                color="rgb(14, 105, 66)"
+                size="large"
+            >
+            </v-btn>
+        </template>
+
+        <template v-slot:default="{ isActive }">
+            <v-card :title="t('learningObjectUploadTitle')">
+                <v-card-text>
+                    <v-file-upload
+                        icon="mdi-upload"
+                        v-model="fileToUpload"
+                        :disabled="isPending"
+                    ></v-file-upload>
+                    <v-alert
+                        v-if="error"
+                        icon="mdi mdi-alert-circle"
+                        type="error"
+                        :title="t('uploadFailed')"
+                        :text="t((error.response?.data as ContainsErrorString).error ?? error.message)"
+                    ></v-alert>
+                </v-card-text>
+
+                <v-card-actions>
+                    <v-spacer></v-spacer>
+                    <v-btn
+                        :text="t('cancel')"
+                        @click="isActive.value = false"
+                    ></v-btn>
+                    <v-btn
+                        :text="t('upload')"
+                        @click="uploadFile()"
+                        :loading="isPending"
+                        :disabled="!fileToUpload"
+                    ></v-btn>
+                </v-card-actions>
+            </v-card>
+        </template>
+    </v-dialog>
+</template>
+<style scoped></style>

frontend/src/views/own-learning-content/learning-objects/OwnLearningObjectsView.vue

@@ -0,0 +1,79 @@
+<script setup lang="ts">
+    import type { LearningObject } from "@/data-objects/learning-objects/learning-object";
+    import LearningObjectUploadButton from "@/views/own-learning-content/learning-objects/LearningObjectUploadButton.vue";
+    import LearningObjectPreviewCard from "./LearningObjectPreviewCard.vue";
+    import { computed, ref, watch, type Ref } from "vue";
+    import { useI18n } from "vue-i18n";
+
+    const { t } = useI18n();
+    const props = defineProps<{
+        learningObjects: LearningObject[];
+    }>();
+
+    const tableHeaders = [
+        { title: t("hruid"), width: "250px", key: "key" },
+        { title: t("language"), width: "50px", key: "language" },
+        { title: t("version"), width: "50px", key: "version" },
+        { title: t("title"), key: "title" },
+    ];
+
+    const selectedLearningObjects: Ref<LearningObject[]> = ref([]);
+
+    watch(
+        () => props.learningObjects,
+        () => (selectedLearningObjects.value = []),
+    );
+
+    const selectedLearningObject = computed(() =>
+        selectedLearningObjects.value ? selectedLearningObjects.value[0] : undefined,
+    );
+</script>
+
+<template>
+    <div class="root">
+        <div class="table-container">
+            <learning-object-upload-button />
+            <v-data-table
+                class="table"
+                v-model="selectedLearningObjects"
+                :items="props.learningObjects"
+                :headers="tableHeaders"
+                select-strategy="single"
+                show-select
+                return-object
+            />
+        </div>
+        <div
+            class="preview-container"
+            v-if="selectedLearningObject"
+        >
+            <learning-object-preview-card
+                class="preview"
+                :selectedLearningObject="selectedLearningObject"
+            />
+        </div>
+    </div>
+</template>
+
+<style scoped>
+    .root {
+        display: flex;
+        gap: 20px;
+        padding: 20px;
+        flex-wrap: wrap;
+    }
+    .preview-container {
+        flex: 1;
+        min-width: 400px;
+    }
+    .table-container {
+        flex: 1;
+    }
+    .preview {
+        width: 100%;
+    }
+    .table {
+        width: 100%;
+        margin-top: 20px;
+    }
+</style>

frontend/src/views/own-learning-content/learning-paths/LearningPathPreviewCard.vue

@@ -0,0 +1,147 @@
+<script setup lang="ts">
+    import { useI18n } from "vue-i18n";
+    import { computed, ref, watch, type Ref } from "vue";
+    import JsonEditorVue from "json-editor-vue";
+    import ButtonWithConfirmation from "@/components/ButtonWithConfirmation.vue";
+    import {
+        useDeleteLearningPathMutation,
+        usePostLearningPathMutation,
+        usePutLearningPathMutation,
+    } from "@/queries/learning-paths";
+    import { Language } from "@/data-objects/language";
+    import type { LearningPath } from "@dwengo-1/common/interfaces/learning-content";
+    import type { AxiosError } from "axios";
+    import { parse } from "uuid";
+
+    const { t } = useI18n();
+
+    const props = defineProps<{
+        selectedLearningPath?: LearningPath;
+    }>();
+
+    const { isPending, mutate, error: deleteError, isSuccess: deleteSuccess } = useDeleteLearningPathMutation();
+
+    const DEFAULT_LEARNING_PATH: Partial<LearningPath> = {
+        language: "en",
+        hruid: "...",
+        title: "...",
+        description: "...",
+        nodes: [
+            {
+                learningobject_hruid: "...",
+                language: Language.English,
+                version: 1,
+                start_node: true,
+                transitions: [
+                    {
+                        default: true,
+                        condition: t("hintRemoveIfUnconditionalTransition"),
+                        next: {
+                            hruid: "...",
+                            version: 1,
+                            language: "...",
+                        },
+                    },
+                ],
+            },
+        ],
+    };
+
+    const { isPending: isPostPending, error: postError, mutate: doPost } = usePostLearningPathMutation();
+    const { isPending: isPutPending, error: putError, mutate: doPut } = usePutLearningPathMutation();
+
+    const learningPath: Ref<Partial<LearningPath> | string> = ref(DEFAULT_LEARNING_PATH);
+
+    const parsedLearningPath = computed(() =>
+        typeof learningPath.value === "string" ? (JSON.parse(learningPath.value) as LearningPath) : learningPath.value,
+    );
+
+    watch(
+        () => props.selectedLearningPath,
+        () => (learningPath.value = props.selectedLearningPath ?? DEFAULT_LEARNING_PATH),
+    );
+
+    function uploadLearningPath(): void {
+        if (props.selectedLearningPath) {
+            doPut({ learningPath: parsedLearningPath.value });
+        } else {
+            doPost({ learningPath: parsedLearningPath.value });
+        }
+    }
+
+    function deleteLearningPath(): void {
+        if (props.selectedLearningPath) {
+            mutate({
+                hruid: props.selectedLearningPath.hruid,
+                language: props.selectedLearningPath.language as Language,
+            });
+        }
+    }
+
+    function extractErrorMessage(error: AxiosError): string {
+        return (error.response?.data as { error: string }).error ?? error.message;
+    }
+
+    const isIdModified = computed(
+        () =>
+            props.selectedLearningPath !== undefined &&
+            (props.selectedLearningPath.hruid !== parsedLearningPath.value.hruid ||
+                props.selectedLearningPath.language !== parsedLearningPath.value.language),
+    );
+
+    function getErrorMessage(): string | null {
+        if (postError.value) {
+            return t(extractErrorMessage(postError.value));
+        } else if (putError.value) {
+            return t(extractErrorMessage(putError.value));
+        } else if (deleteError.value) {
+            return t(extractErrorMessage(deleteError.value));
+        } else if (isIdModified.value) {
+            return t("learningPathCantModifyId");
+        }
+        return null;
+    }
+</script>
+
+<template>
+    <v-card :title="props.selectedLearningPath ? t('editLearningPath') : t('newLearningPath')">
+        <template v-slot:text>
+            <json-editor-vue v-model="learningPath"></json-editor-vue>
+            <v-alert
+                v-if="postError || putError || deleteError || isIdModified"
+                icon="mdi mdi-alert-circle"
+                type="error"
+                :title="t('error')"
+                :text="getErrorMessage()!"
+            ></v-alert>
+        </template>
+        <template v-slot:actions>
+            <v-btn
+                @click="uploadLearningPath"
+                prependIcon="mdi mdi-check"
+                :loading="isPostPending || isPutPending"
+                :disabled="parsedLearningPath.hruid === DEFAULT_LEARNING_PATH.hruid || isIdModified"
+            >
+                {{ props.selectedLearningPath ? t("saveChanges") : t("create") }}
+            </v-btn>
+            <button-with-confirmation
+                @confirm="deleteLearningPath"
+                :disabled="!props.selectedLearningPath"
+                :text="t('delete')"
+                color="red"
+                prependIcon="mdi mdi-delete"
+                :confirmQueryText="t('learningPathDeleteQuery')"
+            />
+            <v-btn
+                :href="`/learningPath/${props.selectedLearningPath?.hruid}/${props.selectedLearningPath?.language}/start`"
+                target="_blank"
+                prepend-icon="mdi mdi-open-in-new"
+                :disabled="!props.selectedLearningPath"
+            >
+                {{ t("open") }}
+            </v-btn>
+        </template>
+    </v-card>
+</template>
+
+<style scoped></style>

frontend/src/views/own-learning-content/learning-paths/OwnLearningPathsView.vue

@@ -0,0 +1,77 @@
+<script setup lang="ts">
+    import LearningPathPreviewCard from "./LearningPathPreviewCard.vue";
+    import { computed, ref, watch, type Ref } from "vue";
+    import { useI18n } from "vue-i18n";
+    import type { LearningPath as LearningPathDTO } from "@dwengo-1/common/interfaces/learning-content";
+
+    const { t } = useI18n();
+    const props = defineProps<{
+        learningPaths: LearningPathDTO[];
+    }>();
+
+    const tableHeaders = [
+        { title: t("hruid"), width: "250px", key: "hruid" },
+        { title: t("language"), width: "50px", key: "language" },
+        { title: t("title"), key: "title" },
+    ];
+
+    const selectedLearningPaths: Ref<LearningPathDTO[]> = ref([]);
+
+    const selectedLearningPath = computed(() =>
+        selectedLearningPaths.value ? selectedLearningPaths.value[0] : undefined,
+    );
+
+    watch(
+        () => props.learningPaths,
+        () => (selectedLearningPaths.value = []),
+    );
+</script>
+
+<template>
+    <div class="root">
+        <div class="table-container">
+            <v-data-table
+                class="table"
+                v-model="selectedLearningPaths"
+                :items="props.learningPaths"
+                :headers="tableHeaders"
+                select-strategy="single"
+                show-select
+                return-object
+            />
+        </div>
+        <div class="preview-container">
+            <learning-path-preview-card
+                class="preview"
+                :selectedLearningPath="selectedLearningPath"
+            />
+        </div>
+    </div>
+</template>
+
+<style scoped>
+    .fab {
+        position: absolute;
+        right: 20px;
+        bottom: 20px;
+    }
+    .root {
+        display: flex;
+        gap: 20px;
+        padding: 20px;
+        flex-wrap: wrap;
+    }
+    .preview-container {
+        flex: 1;
+        min-width: 400px;
+    }
+    .table-container {
+        flex: 1;
+    }
+    .preview {
+        width: 100%;
+    }
+    .table {
+        width: 100%;
+    }
+</style>

frontend/tests/controllers/learning-objects-controller.test.ts

@@ -0,0 +1,28 @@
+import { LearningObjectController } from "../../src/controllers/learning-objects";
+import { Language } from "@dwengo-1/common/util/language";
+import { beforeEach, describe, expect, it } from "vitest";
+
+describe("Test controller learning object", () => {
+    let controller: LearningObjectController;
+
+    beforeEach(async () => {
+        controller = new LearningObjectController();
+    });
+
+    it("can get the metadata of a learning object", async () => {
+        const result = await controller.getMetadata("u_id01", Language.English, 1);
+        expect(result).not.toBeNull();
+        for (const property of ["key", "version", "language", "title"]) {
+            expect(result).toHaveProperty(property);
+        }
+        expect(result.key).toEqual("u_id01");
+        expect(result.version).toEqual(1);
+        expect(result.language).toEqual(Language.English);
+    });
+
+    it("can get the HTML of a learning object", async () => {
+        const result = await controller.getHTML("u_id01", Language.English, 1);
+        expect(result).toHaveProperty("body");
+        expect(result.body).toHaveProperty("innerHTML");
+    });
+});

frontend/tests/controllers/learning-paths-controller.test.ts

@@ -18,4 +18,9 @@ describe("Test controller learning paths", () => {
         const data = await controller.getAllByThemeAndLanguage("kiks", Language.Dutch);
         expect(data).to.have.length.greaterThan(0);
     });
+
+    it("Can get all learning paths administrated by a certain user.", async () => {
+        const data = await controller.getAllByAdminRaw("user");
+        expect(data.length).toBe(0); // This user does not administrate any learning paths in the test data.
+    });
 });

frontend/vite.config.ts

@@ -9,6 +9,7 @@ export default defineConfig({
     resolve: {
         alias: {
             "@": fileURLToPath(new URL("./src", import.meta.url)),
+            "@dwengo-1/common": fileURLToPath(new URL("../common/src", import.meta.url)),
         },
     },
     build: {