tdpeuter/2025SELab2-project-Dwengo
tdpeuter/2025SELab2-project-Dwengo
1
Fork 0
Code Issues Releases 4 Packages 2 Wiki Activity

feat(backend): DatabaseLearningObjectProvider geïmplementeerd.

Browse source
This commit is contained in:
Gerald Schmittinger 2025-03-08 13:42:28 +01:00
parent 463c8c9fc0
commit bbcf22e4ea
8 changed files with 157 additions and 32 deletions
Download patch file Download diff file Expand all files Collapse all files

25
backend/src/services/learning-objects/processing/processing-service.ts
View file

@ -15,8 +15,10 @@ import Processor from "./processor";
import {DwengoContentType} from "./content-type";
import {LearningObjectIdentifier} from "../../../interfaces/learning-content";
import {Language} from "../../../entities/content/language";
import {replaceAsync} from "../../../util/async";
const EMBEDDED_LEARNING_OBJECT_PLACEHOLDER = /<learning-object hruid="([^"]+)" language="([^"]+)" version="([^"]+)"\/>/g;
const LEARNING_OBJECT_DOES_NOT_EXIST = "<div class='non-existing-learning-object' />";
class ProcessingService {
private processors!: Map<DwengoContentType, Processor<any>>;
@ -48,15 +50,28 @@ class ProcessingService {
* by placeholders.
* @returns Rendered HTML for this LearningObject as a string.
*/
render(learningObject: LearningObject, fetchEmbeddedLearningObjects?: (loId: LearningObjectIdentifier) => LearningObject): string {
async render(
learningObject: LearningObject,
fetchEmbeddedLearningObjects?: (loId: LearningObjectIdentifier) => Promise<LearningObject | null>
): Promise<string> {
let html = this.processors.get(learningObject.contentType)!.renderLearningObject(learningObject);
if (fetchEmbeddedLearningObjects) {
// Replace all embedded learning objects.
return html.replace(
return replaceAsync(
html,
EMBEDDED_LEARNING_OBJECT_PLACEHOLDER,
(_, hruid: string, language: string, version: string): string => {
async (_, hruid: string, language: string, version: string): Promise<string> => {
// Fetch the embedded learning object...
const learningObject = fetchEmbeddedLearningObjects({hruid, language: language as Language, version})
const learningObject = await fetchEmbeddedLearningObjects({
hruid,
language: language as Language,
version: parseInt(version)
});
// If it does not exist, replace it by a placeholder.
if (!learningObject) {
return LEARNING_OBJECT_DOES_NOT_EXIST;
}
// ... and render it.
return this.render(learningObject);
@ -67,4 +82,4 @@ class ProcessingService {
}
}
export default ProcessingService;
export default new ProcessingService();