Add sending media files

app.js

@@ -1,4 +1,4 @@
-const { Client } = require('whatsapp-web.js');
+const { Client, MessageMedia } = require('whatsapp-web.js');
 const express = require('express');
 const { body, validationResult } = require('express-validator');
 const socketIO = require('socket.io');
@@ -6,6 +6,8 @@ const qrcode = require('qrcode');
 const http = require('http');
 const fs = require('fs');
 const { phoneNumberFormatter } = require('./helpers/formatter');
+const fileUpload = require('express-fileupload');
+const axios = require('axios');
 
 const app = express();
 const server = http.createServer(app);
@@ -13,6 +15,9 @@ const io = socketIO(server);
 
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
+app.use(fileUpload({
+    debug: true
+}));
 
 const SESSION_FILE_PATH = './whatsapp-session.json';
 let sessionCfg;
@@ -138,6 +143,36 @@ app.post('/send-message', [
     });
 });
 
+// Send media
+app.post('/send-media', async (req, res) => {
+    const number = phoneNumberFormatter(req.body.number);
+    const caption = req.body.caption;
+    const fileUrl = req.body.file;
+    
+    // const media = MessageMedia.fromFilePath('./image-example.png');
+    // const file = req.files.file;
+    // const media = new MessageMedia(file.mimetype, file.data.toString('base64'), file.name);
+    let mimetype;
+    const attachment = await axios.get(fileUrl, { responseType: 'arraybuffer' }).then(response => {
+        mimetype = response.headers['content-type'];
+        return response.data.toString('base64');
+    });
+
+    const media = new MessageMedia(mimetype, attachment, 'Media');
+
+    client.sendMessage(number, media, { caption: caption }).then(response => {
+        res.status(200).json({
+            status: true,
+            response: response
+        });
+    }).catch(err => {
+        res.status(500).json({
+            status: false,
+            response: err
+        });
+    });
+});
+
 server.listen(8000, function() {
     console.log('App running on *: ' + 8000);
 });