adds comments to debates [#7]

app/controllers/comments_controller.rb

@@ -0,0 +1,28 @@
+class CommentsController < ApplicationController
+  before_action :authenticate_user!
+  before_action :set_debate, :set_parent
+
+  def create
+    comment = Comment.build(@debate, current_user, params[:comment][:body])
+    comment.save!
+    comment.move_to_child_of(@parent) if reply?
+    redirect_to @debate, notice: "Comentario guardado"
+  end
+
+  private
+    def comment_params
+      params.require(:comments).permit(:commentable_type, :commentable_id, :body)
+    end
+
+    def set_debate
+      @debate = Debate.find(params[:debate_id])
+    end
+
+    def set_parent
+      @parent = Comment.find_parent(params[:comment])
+    end
+
+    def reply?
+      @parent.class == Comment
+    end
+end