Chore: Cleanup attachment handling for Facebook & Whatsapp (#1051)

* Chore: Enable file upload for facebook messenger
* Chore: Fix attachments
* Chore: Fix Specs
* Fix ReplyBox file attachment logic
* Set default value for message

Co-authored-by: Pranav Raj Sreepuram <pranavrajs@gmail.com>

app/services/facebook/send_on_facebook_service.rb

@@ -17,19 +17,26 @@ class Facebook::SendOnFacebookService < Base::SendOnChannelService
   end
 
   def fb_attachment_message_params
+    attachment = message.attachments.first
     {
       recipient: { id: contact.get_source_id(inbox.id) },
       message: {
         attachment: {
-          type: 'image',
+          type: attachment_type(attachment),
           payload: {
-            url: message.attachments.first.file_url
+            url: attachment.file_url
           }
         }
       }
     }
   end
 
+  def attachment_type(attachment)
+    return attachment.file_type if %w[image audio video file].include? attachment.file_type
+
+    'file'
+  end
+
   def fb_message_params
     if message.attachments.blank?
       fb_text_message_params