feat: added route for learningObjects

backend/src/services/learningObjects.ts

@@ -0,0 +1,67 @@
+import axios from "axios";
+import { DWENGO_API_BASE } from "../config/config.js";
+
+interface LearningObjectNode {
+    _id: string;
+    learningobject_hruid: string;
+    version: number;
+    language: string;
+}
+
+
+export async function getLearningObjectsFromPath(hruid: string, language: string) {
+    try {
+        const learningPathUrl = `${DWENGO_API_BASE}/learningPath/${hruid}/${language}`;
+        const learningPathResponse = await axios.get(learningPathUrl);
+        const nodes = learningPathResponse.data.nodes;
+
+        if (!nodes || nodes.length === 0) {
+            throw new Error("No learning objects found in this learning path.");
+        }
+
+        return await Promise.all(
+            nodes.map(async (node: LearningObjectNode) => {
+                const metadataUrl = `${DWENGO_API_BASE}/learningObject/getMetadata?hruid=${node.learningobject_hruid}&version=${node.version}&language=${language}`;
+                const metadataResponse = await axios.get(metadataUrl);
+
+                const html_url = `${DWENGO_API_BASE}/learningObject/getRaw?hruid=${node.learningobject_hruid}&version=${node.version}&language=${language}`;
+
+                return filterLearningObjectMetadata(metadataResponse.data, html_url);
+            })
+        );
+
+    } catch (error) {
+        console.error("Error fetching learning objects:", error);
+        throw new Error("Failed to fetch learning objects.");
+    }
+}
+
+function filterLearningObjectMetadata(data: any, html_url: String) {
+    return {
+        key: data.hruid,
+                // hruid learningObject (not path)
+        _id: data._id,
+        uuid: data.uuid,
+        version: data.version,
+
+        title: data.title,
+        html_url,
+            // html content object
+        language: data.language,
+        difficulty: data.difficulty,
+        estimated_time: data.estimated_time,
+        available: data.available,
+        teacher_exclusive: data.teacher_exclusive,
+        educational_goals: data.educational_goals,
+                // list with learningObjects
+        keywords: data.keywords,
+                // for search
+        description: data.description,
+                // for search (not an actual description)
+        target_ages: data.target_ages,
+
+        // skos concepts needed ??
+        // content type needed ??
+        // content location ??
+    };
+}