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server/src/config/multer-option.config.ts

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+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 } from 'path';
+import { Request } from 'express';
+
+export const multerConfig = {
+  dest: process.env.UPLOAD_LOCATION,
+};
+
+export const multerOption: MulterOptions = {
+  fileFilter: (req: Request, file: any, cb: any) => {
+    if (file.mimetype.match(/\/(jpg|jpeg|png|gif|mp4|x-msvideo|quicktime)$/)) {
+      cb(null, true);
+    } else {
+      cb(new HttpException(`Unsupported file type ${extname(file.originalname)}`, HttpStatus.BAD_REQUEST), false);
+    }
+  },
+
+  storage: diskStorage({
+    destination: (req: Request, file: Express.Multer.File, cb: any) => {
+      const uploadPath = multerConfig.dest;
+
+      const userPath = `${uploadPath}/${req.user['id']}/original/${req.body['deviceId']}`;
+
+      if (!existsSync(userPath)) {
+        mkdirSync(userPath, { recursive: true });
+      }
+
+      cb(null, userPath);
+    },
+
+    filename: (req: Request, file: Express.Multer.File, cb: any) => {
+      cb(null, `${file.originalname}${req.body['fileExtension']}`);
+    },
+  }),
+};