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middlewares/multer.js

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+const multer = require('multer');
+const path = require('path');
+
+const imageStorage = multer.diskStorage({
+    // Destination to store image     
+    destination: 'assets/images', 
+        filename: (req, file, cb) => {
+            // let filename=file.originalname.split(".")[0];
+            // cb(null, filename + '_' + Date.now() + path.extname(file.originalname))
+            cb(null, file.originalname)
+            // file.fieldname is name of the field (image)
+            // path.extname get the uploaded file extension
+    }
+});
+const imageUpload = multer({
+    storage: imageStorage,
+    limits: {
+        fileSize: 1500000 // 1000000 Bytes = 1 MB
+    },
+    fileFilter(req, file, cb) {
+        if (!file.originalname.match(/\.(png|jpg)$/)) { 
+            // upload only png and jpg format
+            return cb(new Error('Please upload a Image'))
+        }
+    //  cb(undefined, true)
+        cb(null, true)
+    }
+}).single("attendancefile");
+
+module.exports = (req, res, next) => {
+    try {
+        // console.log(req);
+        imageUpload(req,res,next, function(err){
+            try {
+                if (err){
+                    console.log(err);
+                    res.status(400).send({
+                        "success":false,
+                        "message" : JSON.stringify(err),
+                        "data" :[]
+                    });
+                } else {
+                    console.log('The filename is ' + res.req.file.filename);
+                    // req.append("filename",res.req.file.filename);  
+                    // req.body.attendancefile=res.req.file.filename;
+                }
+                next();       
+            } catch (error) {
+                console.log("error "+error);
+            }                
+        });
+        
+    } catch (error) {
+        console.log(error);
+        error.message = error.message;
+        error.statusCode = 500;
+        throw error;
+    }
+    
+
+}