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

app/models/debate.rb

@@ -1,6 +1,27 @@
+require 'numeric'
 class Debate < ActiveRecord::Base
+  acts_as_votable
+
   validates :title, presence: true
   validates :description, presence: true
 
   validates :terms_of_service, acceptance: { allow_nil: false }, on: :create
+
+  #vote can be 'likes' or 'dislikes'
+  def percentage(vote)
+    return if total_votes == 0
+    send(vote).percent_of(total_votes)
+  end
+
+  def likes
+    get_likes.size
+  end
+
+  def dislikes
+    get_dislikes.size
+  end
+
+  def total_votes
+    votes_for.size
+  end
 end

app/views/debates/show.html.erb

@@ -4,5 +4,22 @@
   <p>Creado el: <%= l @debate.created_at.to_date %></p>
 </div>
 
-<%= link_to 'Edit', edit_debate_path(@debate) %> |
+<div>
-<%= link_to 'Back', debates_path %>
+  <div id='in_favor'>
+    <%= link_to "up", debate_votes_path(@debate, value: 'yes'), method: "post" %>
+    <%= @debate.percentage('likes') %>%
+  </div>
+  
+  <div id='against'>
+    <%= link_to "down", debate_votes_path(@debate, value: 'no'), method: "post" %>
+    <%= @debate.percentage('dislikes') %>%
+  </div>
+  
+  Votos <%= @debate.total_votes %>
+</div>
+
+<br/><br/>
+<div>
+  <%= link_to 'Edit', edit_debate_path(@debate) %> |
+  <%= link_to 'Back', debates_path %>
+</div>

config/routes.rb

@@ -5,7 +5,9 @@ Rails.application.routes.draw do
 
   # You can have the root of your site routed with "root"
   root 'welcome#index'
-  resources :debates
+  resources :debates do
+    resources :votes, only: :create
+  end
 
   # Example of regular route:
   #   get 'products/:id' => 'catalog#view'

lib/numeric.rb

@@ -0,0 +1,5 @@
+class Numeric
+  def percent_of(n)
+    (self.to_f / n * 100).to_i
+  end
+end