feat(backend): Repositories voor leerinhoud

LearningObjectRepository, LearningPathRepository en AttachmentRepository aangemaakt.

backend/src/data/content/attachment-repository.ts

@@ -0,0 +1,10 @@
+import {DwengoEntityRepository} from "../dwengo-entity-repository";
+import {Attachment} from "../../entities/content/attachment.entity";
+import {LearningObject} from "../../entities/content/learning-object.entity";
+
+export class AttachmentRepository extends DwengoEntityRepository<Attachment> {
+    public findByLearningObjectAndNumber(learningObject: LearningObject, sequenceNumber: number) {
+        return this.findOne({learningObject: learningObject, sequenceNumber: sequenceNumber});
+    }
+    // This repository is read-only for now since creating own learning object is an extension feature.
+}

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

@@ -0,0 +1,14 @@
+import {DwengoEntityRepository} from "../dwengo-entity-repository";
+import {LearningObject} from "../../entities/content/learning-object.entity";
+import {LearningObjectIdentifier} from "../../entities/content/learning-object-identifier";
+
+export class LearningObjectRepository extends DwengoEntityRepository<LearningObject> {
+    public findByIdentifier(identifier: LearningObjectIdentifier): Promise<LearningObject | null> {
+        return this.findOne({
+            hruid: identifier.hruid,
+            language: identifier.language,
+            version: identifier.version
+        });
+    }
+    // This repository is read-only for now since creating own learning object is an extension feature.
+}

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

@@ -0,0 +1,10 @@
+import {DwengoEntityRepository} from "../dwengo-entity-repository";
+import {LearningPath} from "../../entities/content/learning-path.entity";
+import {Language} from "../../entities/content/language";
+
+export class LearningPathRepository extends DwengoEntityRepository<LearningPath> {
+    public findByHruidAndLanguage(hruid: string, language: Language): Promise<LearningPath | null> {
+        return this.findOne({hruid: hruid, language: language});
+    }
+    // This repository is read-only for now since creating own learning object is an extension feature.
+}

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

@@ -7,7 +7,7 @@ export class Attachment {
     learningObject!: LearningObject;
 
     @PrimaryKey({type: "integer"})
-    no!: number;
+    sequenceNumber!: number;
 
     @Property({type: "string"})
     mimeType!: string;

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

@@ -23,7 +23,7 @@ export class LearningPath {
     image!: string;
 
     @Embedded({entity: () => LearningPathNode, array: true})
-    nodes: LearningPathNode[];
+    nodes: LearningPathNode[] = [];
 }
 
 @Embeddable()