immich/server/apps/immich/src/config/asset-upload.config.ts

import { APP_UPLOAD_LOCATION } from '@app/common/constants';
import { HttpException, HttpStatus } from '@nestjs/common';
import { MulterOptions } from '@nestjs/platform-express/multer/interfaces/multer-options.interface';
import { existsSync, mkdirSync } from 'fs';
import { diskStorage } from 'multer';
import { extname, join } from 'path';
import { Request } from 'express';
import { randomUUID } from 'crypto';

export const assetUploadOption: MulterOptions = {
  fileFilter: (req: Request, file: any, cb: any) => {
    if (file.mimetype.match(/\/(jpg|jpeg|png|gif|mp4|x-msvideo|quicktime|heic|heif|dng|x-adobe-dng|webp|tiff|3gpp)$/)) {
      cb(null, true);
    } else {
      cb(new HttpException(`Unsupported file type ${extname(file.originalname)}`, HttpStatus.BAD_REQUEST), false);
    }
  },

  storage: diskStorage({
    destination: (req: Request, file: Express.Multer.File, cb: any) => {
      const basePath = APP_UPLOAD_LOCATION;
      // TODO these are currently not used. Shall we remove them?
      // const fileInfo = req.body as CreateAssetDto;

      // const yearInfo = new Date(fileInfo.createdAt).getFullYear();
      // const monthInfo = new Date(fileInfo.createdAt).getMonth();

      if (!req.user) {
        return;
      }

      const originalUploadFolder = join(basePath, req.user.id, 'original', req.body['deviceId']);

      if (!existsSync(originalUploadFolder)) {
        mkdirSync(originalUploadFolder, { recursive: true });
      }

      // Save original to disk
      cb(null, originalUploadFolder);
    },

    filename: (req: Request, file: Express.Multer.File, cb: any) => {
      const fileNameUUID = randomUUID();

      cb(null, `${fileNameUUID}${req.body['fileExtension'].toLowerCase()}`);
    },
  }),
};