feat: Helper function to create MessageMedia from a local file path

src/structures/MessageMedia.js

@@ -1,5 +1,9 @@
 'use strict';
 
+const fs = require('fs');
+const path = require('path');
+const mime = require('mime');
+
 /**
  * Media attached to a message
  * @param {string} mimetype MIME type of the attachment
@@ -26,6 +30,18 @@ class MessageMedia {
          */
         this.filename = filename;
     }
+
+    /**
+     * Creates a MessageMedia instance from a local file path
+     * @param {string} path 
+     */
+    static fromFilePath(filePath) {
+        const b64data = fs.readFileSync(filePath, {encoding: 'base64'});
+        const mimetype = mime.getType(filePath); 
+        const filename = path.basename(filePath);
+
+        return new MessageMedia(mimetype, b64data, filename);
+    }
 }
 
 module.exports = MessageMedia;