Extract Message.process

js/modules/types/message.js

@@ -1,2 +1,10 @@
+const Attachment = require('./attachment');
+
 exports.GROUP = 'group';
 exports.PRIVATE = 'private';
+
+// Message -> Promise Message
+exports.process = async (message) =>
+  Object.assign({}, message, {
+    attachments: await Promise.all(message.attachments.map(Attachment.process)),
+  })