2025SELab2-project-Dwengo/backend/src/controllers/learning-objects.ts

82 lines
3.3 KiB
TypeScript

import { Request, Response } from 'express';
import { FALLBACK_LANG } from '../config.js';
import learningObjectService from '../services/learning-objects/learning-object-service.js';
import { Language } from '@dwengo-1/common/util/language';
import attachmentService from '../services/learning-objects/attachment-service.js';
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";
function getLearningObjectIdentifierFromRequest(req: Request): LearningObjectIdentifierDTO {
if (!req.params.hruid) {
throw new BadRequestException('HRUID is required.');
}
return {
hruid: req.params.hruid,
language: (req.query.language || getEnvVar(envVars.FallbackLanguage)) as Language,
version: parseInt(req.query.version as string),
};
}
function getLearningPathIdentifierFromRequest(req: Request): LearningPathIdentifier {
if (!req.query.hruid) {
throw new BadRequestException('HRUID is required.');
}
return {
hruid: req.params.hruid,
language: (req.query.language as Language) || FALLBACK_LANG,
};
}
export async function getAllLearningObjects(req: Request, res: Response): Promise<void> {
const learningPathId = getLearningPathIdentifierFromRequest(req);
const full = req.query.full;
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> {
const learningObjectId = getLearningObjectIdentifierFromRequest(req);
const learningObject = await learningObjectService.getLearningObjectById(learningObjectId);
if (!learningObject) {
throw new NotFoundException('Learning object not found');
}
res.json(learningObject);
}
export async function getLearningObjectHTML(req: Request, res: Response): Promise<void> {
const learningObjectId = getLearningObjectIdentifierFromRequest(req);
const learningObject = await learningObjectService.getLearningObjectHTML(learningObjectId);
res.send(learningObject);
}
export async function getAttachment(req: Request, res: Response): Promise<void> {
const learningObjectId = getLearningObjectIdentifierFromRequest(req);
const name = req.params.attachmentName;
const attachment = await attachmentService.getAttachment(learningObjectId, name);
if (!attachment) {
throw new NotFoundException(`Attachment ${name} not found`);
}
res.setHeader('Content-Type', attachment.mimeType).send(attachment.content);
}
export async function handlePostLearningObject(req: Request, res: Response): Promise<void> {
if (!req.files || !req.files[0]) {
throw new BadRequestException('No file uploaded');
}
await learningObjectService.storeLearningObject((req.files[0] as UploadedFile).tempFilePath);
}