Improve rails controllers (#118)

app/workflows/SendNotificationForCommentWorkflow.rb

@@ -0,0 +1,34 @@
+class SendNotificationForCommentWorkflow
+  attr_accessor :comment
+
+  def initialize(comment: "")
+    @comment = comment
+  end
+
+  def run
+    if comment.is_post_update # Post update
+      UserMailer.notify_followers_of_post_update(comment: comment).deliver_later
+      return
+    end
+    
+    if comment.parent_id == nil # Reply to a post
+      user = comment.post.user
+      
+      if comment.user.id != user.id and
+        user.notifications_enabled? and
+        comment.post.follows.exists?(user_id: user.id)
+        
+        UserMailer.notify_post_owner(comment: comment).deliver_later
+      end
+    else # Reply to a comment
+      parent_comment = comment.parent
+      user = parent_comment.user
+
+      if user.notifications_enabled? and
+        parent_comment.user.id != comment.user.id
+        
+        UserMailer.notify_comment_owner(comment: comment).deliver_later
+      end
+    end
+  end
+end