refactor message creation (conversations)

Changelog.md

@@ -11,6 +11,7 @@
 * Refactor ConversationsController, move query building to User model. [#4547](https://github.com/diaspora/diaspora/pull/4547)
 * Refactor the Twitter service model [#4387](https://github.com/diaspora/diaspora/pull/4387)
 * Refactor ConversationsController#create, move more stuff to User model [#4551](https://github.com/diaspora/diaspora/pull/4551)
+* Refactor MessagesController#create, move stuff to User model [#4556](https://github.com/diaspora/diaspora/pull/4556)
 
 ## Bug fixes
 * Highlight down arrow at the user menu on hover [#4441](https://github.com/diaspora/diaspora/pull/4441)

app/controllers/messages_controller.rb

@@ -11,10 +11,8 @@ class MessagesController < ApplicationController
   def create
     conversation = Conversation.find(params[:conversation_id])
 
-    message = conversation.messages.build(
-      :text   => params[:message][:text],
-      :author => current_user.person
-    )
+    opts = params.require(:message).permit(:text)
+    message = current_user.build_message(conversation, opts)
 
     if message.save
       Rails.logger.info("event=create type=comment user=#{current_user.diaspora_handle} status=success message=#{message.id} chars=#{params[:message][:text].length}")

app/models/user/social_actions.rb

@@ -36,6 +36,13 @@ module User::SocialActions
     end
   end
 
+  def build_message(conversation, opts={})
+    conversation.messages.build(
+      text: opts[:text],
+      author: self.person
+    )
+  end
+
   def find_or_create_participation!(target)
     participations.where(:target_id => target).first || participate!(target)
   end