Multer Upload Object Setup

Author: pronazmul

middlewares/users/avatarUpload.js

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+// Internal Modules
+const singleUploader = require("../../utilities/singleUploader");
+
+// Pass Single Uploder to Create Multar Upload Object
+const avatarUpload = (req, res, next) => {
+  const upload = singleUploader(
+    "avatars",
+    ["image/jpeg", "image/jpg", "image/png"],
+    1000000,
+    "Only .jpg, jpeg or .png format allowed!"
+  );
+
+  //   Call The Multer Upload MiddleWare Function To Handle Error:
+  upload.any()(req, res, (error) => {
+    if (error) {
+      res.status(500).json({
+        errors: {
+          avatar: {
+            msg: error.message,
+          },
+        },
+      });
+    } else {
+      next();
+    }
+  });
+};
+
+// Module Exports
+module.exports = avatarUpload;

utilities/singleUploader.js

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+// External Imports;
+const createError = require("http-errors");
+const multer = require("multer");
+const path = require("path");
+
+// Multer Object Creator:
+const singleUploader = (
+  subfolder_path,
+  allowed_file_types,
+  max_file_size,
+  error_msg
+) => {
+  // File Upload Folder:
+  const UPLOADS_FOLDER = `${__dirname}/../public/uploads/${subfolder_path}/`;
+
+  // Define Storage && Custom Unique FileName:
+  const storage = multer.diskStorage({
+    destination: (req, file, cb) => {
+      cb(null, UPLOADS_FOLDER);
+    },
+    filename: (req, file, cb) => {
+      const fileExt = path.extname(file.originalname);
+      const fileName =
+        file.originalname
+          .replace(fileExt, "")
+          .toLowerCase()
+          .split(" ")
+          .join("-") +
+        "-" +
+        Date.now();
+      cb(null, fileName + fileExt);
+    },
+  });
+
+  //   Prepare Final Multer Upload Object:
+  const upload = multer.upload({
+    storage: storage,
+    limits: {
+      file_Size: max_file_size,
+    },
+    fileFilter: (req, file, cb) => {
+      if (allowed_file_types.includes(file.mimetype)) {
+        cb(null, true);
+      } else {
+        cb(createError(error_msg));
+      }
+    },
+  });
+
+  return upload;
+};
+
+// Module Exports:
+module.exports = singleUploader;