Integrate OmniAuth with a Singly provider

Using the new gem at Singly/omniauth-singly make starting up a breeze.

Gemfile

@@ -13,6 +13,7 @@ gem 'json'
 
 gem 'haml', '3.1.4'
 gem 'httparty'
+gem 'omniauth-singly'
 
 # Gems used only for assets and not required
 # in production environments by default.

Gemfile.lock

@@ -42,11 +42,15 @@ GEM
     eventmachine (0.12.10)
     execjs (1.3.2)
       multi_json (~> 1.0)
+    faraday (0.8.0)
+      multipart-post (~> 1.1)
     haml (3.1.4)
+    hashie (1.2.0)
     hike (1.2.1)
     httparty (0.8.1)
       multi_json
       multi_xml
+    httpauth (0.1)
     i18n (0.6.0)
     journey (1.0.3)
     jquery-rails (2.0.2)
@@ -60,6 +64,20 @@ GEM
     mime-types (1.18)
     multi_json (1.3.4)
     multi_xml (0.4.2)
+    multipart-post (1.1.5)
+    oauth2 (0.6.1)
+      faraday (~> 0.7)
+      httpauth (~> 0.1)
+      multi_json (~> 1.3)
+    omniauth (1.1.0)
+      hashie (~> 1.2)
+      rack
+    omniauth-oauth2 (1.0.2)
+      oauth2 (~> 0.6.0)
+      omniauth (~> 1.0)
+    omniauth-singly (0.0.1)
+      omniauth (~> 1.0)
+      omniauth-oauth2 (~> 1.0)
     pg (0.13.2)
     polyglot (0.3.3)
     rack (1.4.1)
@@ -120,6 +138,7 @@ DEPENDENCIES
   httparty
   jquery-rails
   json
+  omniauth-singly
   pg
   rails (= 3.2.3)
   sass-rails (~> 3.2.3)

app/controllers/auth_controller.rb

@@ -1,57 +1,17 @@
-require 'httparty'
+require "httparty"
 
 class AuthController < ApplicationController
 
-  def service
-    redirect_to auth_url(params[:service])
-  end
-
   SINGLY_API_BASE = "https://api.singly.com"
 
   def callback
-    data = HTTParty.post(
-      token_url,
-      {:body => token_params(params[:code])}
-    ).parsed_response
-    session[:access_token] = data['access_token']
+    auth = request.env["omniauth.auth"]
+    session[:access_token] = auth.credentials.token
     redirect_to "/"
   end
 
   def logout
     session.clear
     redirect_to "/"
   end
-
-private
-
-  def token_params(code)
-    {
-      :client_id => ENV["SINGLY_ID"],
-      :client_secret => ENV["SINGLY_SECRET"],
-      :code => code
-    }
-  end
-
-  def token_url
-    "#{SINGLY_API_BASE}/oauth/access_token"
-  end
-
-  def auth_params(service)
-    {
-      :client_id => ENV["SINGLY_ID"],
-      :redirect_uri => callback_url,
-      :service => service
-    }.map {|key, value|
-      "#{key}=#{value}"
-    }.join("&")
-  end
-
-  def auth_url(servie)
-    "#{SINGLY_API_BASE}/oauth/authorize?#{auth_params(params[:service])}"
-  end
-
-  def callback_url
-    "#{request.protocol}#{request.host}:#{request.port}/auth_callback"
-  end
-
 end

app/controllers/default_controller.rb

@@ -1,4 +1,4 @@
-require 'httparty'
+require "httparty"
 
 class DefaultController < ApplicationController
   def home

app/views/default/home.html.haml

@@ -19,4 +19,4 @@
         = @profiles[service]
       - else
         is not connected.
-        %a(href="/auth/#{service}") Connect
+        %a(href="/auth/singly?service=#{service}") Connect

config/initializers/omniauth.rb

@@ -0,0 +1,3 @@
+Rails.application.config.middleware.use OmniAuth::Builder do
+  provider :singly, ENV['SINGLY_ID'], ENV['SINGLY_SECRET']
+end

config/routes.rb

@@ -1,6 +1,6 @@
 SinglyRailsSkeleton::Application.routes.draw do
-  match 'auth/:service' => 'auth#service'
-  match 'auth_callback' => 'auth#callback'
-  match 'logout'        => 'auth#logout'
-  root :to              => 'default#home'
+  match "auth/:service"          => "auth#service"
+  match "auth/:service/callback" => "auth#callback"
+  match "logout"                 => "auth#logout"
+  root :to                       => "default#home"
 end