7 files changed, 124 insertions, 0 deletions

@@ -416,3 +416,13 @@
     font-weight: bold;
   }
 }
+
+.post-vote {
+  float: right;
+  position: relative;
+  right: 0.5em;
+
+  a {
+    text-decoration: none;
+  }
+}
@@ -38,4 +38,52 @@ class BlogsController < ApplicationController
     })
   end
 
+  def upvote
+    @blog = Blog.find_by_slug(params[:slug])
+
+    raise ActiveRecord::RecordNotFound unless @blog
+    raise ActiveRecord::RecordNotFound unless @blog.published
+
+    respond_to do |format|
+      if @blog.upvote! request.remote_ip
+        format.html do
+          flash[:notice] = "You have upvoted the blog post \"#{@blog.title}\"."
+          redirect_to @blog
+        end
+        format.js { render "voted" }
+        format.xml { head :ok }
+      else
+        format.html do
+          flash[:notice] = "You have already voted on the blog post \"#{@blog.title}\"."
+          redirect_to @blog
+        end
+        format.xml { render :xml => { :error => "Someone from your IP address has already voted on this blog post."} }
+      end
+    end
+  end
+
+  def downvote
+    @blog = Blog.find_by_slug(params[:slug])
+
+    raise ActiveRecord::RecordNotFound unless @blog
+    raise ActiveRecord::RecordNotFound unless @blog.published
+
+    respond_to do |format|
+      if @blog.downvote! request.remote_ip
+        format.html do
+          flash[:notice] = "You have downvoted the blog post \"#{@blog.title}\"."
+          redirect_to @blog
+        end
+        format.js { render "voted" }
+        format.xml { head :ok }
+      else
+        format.html do
+          flash[:notice] = "You have already voted on the blog post \"#{@blog.title}\"."
+          redirect_to @blog
+        end
+        format.xml { render :xml => { :error => "Someone from your IP address has already voted on this blog post."} }
+      end
+    end
+  end
+
 end
@@ -1,5 +1,6 @@
 class Blog < ApplicationRecord
   include Recordable
+  include Votable
 
   acts_as_taggable
 
@@ -0,0 +1,43 @@
+module Votable
+  extend ActiveSupport::Concern
+
+  included do
+    has_many :votes, as: :votable
+
+    def already_upvoted?(ip)
+      !votes.where(ip: ip, upvote: 1).empty?
+    end
+
+    def already_downvoted?(ip)
+      !votes.where(ip: ip, upvote: 0).empty?
+    end
+
+    def upvote!(ip)
+      return false if already_upvoted?(ip)
+
+      if already_downvoted?(ip)
+        votes.where(ip: ip, upvote: 0).first.delete
+        self.downvotes -= 1
+        save!
+      else
+        votes.create(ip: ip, upvote: 1).save
+        self.upvotes += 1
+        save!
+      end
+    end
+
+    def downvote!(ip)
+      return false if already_downvoted?(ip)
+
+      if already_upvoted?(ip)
+        votes.where(ip: ip, upvote: 1).first.delete
+        self.upvotes -= 1
+        save!
+      else
+        votes.create(ip: ip, upvote: 0).save
+        self.downvotes += 1
+        save!
+      end
+    end
+  end
+end
@@ -0,0 +1,6 @@
+class Vote < ApplicationRecord
+  belongs_to :votable, polymorphic: true
+
+  validates :upvote, presence: true, inclusion: { in: [0, 1] }
+  validates :ip, presence: true
+end
@@ -19,3 +19,7 @@
     %strong= blog.user.login.capitalize
     on
     = blog.visible_date.strftime("%B #{blog.visible_date.day.ordinalize}, %Y at %-I:%M:%S%P")
+  .post-vote{ id: "blog-vote-section-#{blog.id}" }
+    %span.vote-link{ id: "blog-upvote-link-#{blog.id}" }= link_to_unless (not blog.published or blog.already_upvoted?(request.remote_ip)), "👍", upvote_blog_path(blog), remote: true, rel: "nofollow", class: "blog-upvote-link", method: :post
+    %span.post-rating{ id: "blog-rating-#{blog.id}" }= blog.upvotes - blog.downvotes
+    %span.vote-link{ id: "blog-downvote-link-#{blog.id}" }= link_to_unless (not blog.published or blog.already_downvoted?(request.remote_ip)), "👎", downvote_blog_path(blog), remote: true, rel: "nofollow", class: "blog-downvote-link", method: :post
@@ -0,0 +1,12 @@
+$("#blog-rating-<%= @blog.id %>").html('<%= escape_javascript("#{@blog.upvotes - @blog.downvotes}") %>');
+
+<% if @blog.already_upvoted? request.remote_ip %>
+  $("#blog-upvote-link-<%= @blog.id %>").html("👍");
+<% elsif @blog.already_downvoted? request.remote_ip %>
+  $("#blog-downvote-link-<%= @blog.id %>").html("👎");
+<% else %>
+  $("#blog-upvote-link-<%= @blog.id %>").html('<%= escape_javascript(link_to("👍", upvote_blog_path(@blog), remote: true, rel: "nofollow", class: "blog-upvote-link", method: :post)) %>');
+  $("#blog-downvote-link-<%= @blog.id %>").html('<%= escape_javascript(link_to("👎", downvote_blog_path(@blog), remote: true, rel: "nofollow", class: "blog-downvote-link", method: :post)) %>');
+<% end %>
+
+$("#blog-vote-section-<%= @blog.id %>").effect('highlight', {}, 2000);