cosette/server/services/upload-service.ts

import multer from 'multer'
import type { Options } from 'multer'
import fs from 'fs'
import { v4 } from 'uuid'
import path from 'path'

export const uploadService = () => {
  let folderPath = './public/'
  if (!fs.existsSync(folderPath)) {
    fs.mkdirSync(folderPath, { recursive: true })
  }
  const { limits: templateLimits }: Options = {
    limits: {
      files: 10,
      fieldNameSize: 400,
      fileSize: 800 * 1024 * 1024,
    },
  };

  const { filename }: multer.DiskStorageOptions = {
    filename: (_req, file, cb: Function) => {
      const type = path.extname(file.originalname)
      cb(null, v4() + type)
    }
  }

  const generateHandler = () => {
    try {
      const options: Options = {
        limits: {
          ...templateLimits,
        },
        storage: multer.diskStorage({
          filename,
          destination: folderPath
        }),
      };

      return multer(options).array('images', 10);
    } catch (e) {
      console.error('Upload error', e)
      throw e;
    }
  };
  return { generateHandler };
};