adds votes to debates [#9]

app/controllers/votes_controller.rb

@@ -0,0 +1,20 @@
+class VotesController < ApplicationController
+  before_action :set_debate
+  before_action :authenticate_user!
+
+  def create
+    register_vote
+    notice = @debate.vote_registered? ? "Gracias por votar." : "Tu voto ya ha sido registrado."
+    redirect_to @debate, notice: notice
+  end
+
+  private
+
+    def set_debate
+      @debate = Debate.find(params[:debate_id])
+    end  
+
+    def register_vote
+      @debate.vote_by voter: current_user, vote: params[:value]
+    end
+end