twitter oauth support. if twitter, reqs page displays oauth follow bu…

…tton. will associate twitter id to person, have them follow system twitter and system will follow them back. caveat: protected system twitter will follow back but manually accepts follow request

app/controllers/reqs_controller.rb

@@ -4,6 +4,54 @@ class ReqsController < ApplicationController
   before_filter :login_or_oauth_required, :only => [:show, :index]
   before_filter :correct_person_and_no_accept_required, :only => [ :edit, :update ]
   before_filter :correct_person_and_no_commitment_required, :only => [ :destroy ]
+  before_filter :twitter_oauth_setup, :only => [:twitter_oauth_client, :twitter_oauth_callback]
+
+  def twitter_oauth_client
+    @request_token = @consumer.get_request_token
+    session[:req_token] = @request_token.token
+    session[:req_token_secret] = @request_token.secret
+    redirect_to @request_token.authorize_url
+    return
+  end
+
+  def twitter_oauth_callback
+    require 'json'
+    @request_token = OAuth::RequestToken.new(@consumer,session[:req_token],session[:req_token_secret])
+    @access_token = @request_token.get_access_token
+    @resp = @consumer.request(:get, '/account/verify_credentials.json', @access_token, {:scheme => :query_string})
+    case @resp
+    when Net::HTTPSuccess
+      user_info = JSON.parse(@resp.body)
+      unless user_info['screen_name']
+        flash[:error] = "Authentication failed"
+        redirect_to :action => :index
+        return
+      end
+
+      changed = update_screen_name( user_info['screen_name'] )
+      if changed
+        system_twitter = global_prefs.twitter_name
+        response = @access_token.post("/friendships/create/#{system_twitter}.json","")
+        case response 
+        when Net::HTTPSuccess
+          follow(user_info['screen_name'])
+          flash[:notice] = "You are following requests on Twitter!" 
+          redirect_to :action => :index
+        else
+          flash[:error] = "Authentication failed"
+          redirect_to :action => :index
+        end
+        return
+      end
+
+    else
+        flash[:error] = "Authentication failed"
+        redirect_to :action => :index
+        return
+    end
+
+  end
+
   # GET /reqs
   # GET /reqs.xml
   def index
@@ -108,6 +156,48 @@ def destroy
 
   private
 
+  def update_screen_name(screen_name)
+    changed = false
+
+    if current_person.twitter_name.blank?
+      current_person.twitter_name = screen_name
+      current_person.save!
+      flash[:notice] = "Your Twitter name has been set to #{screen_name}"
+      changed = true
+    else
+      if current_person.twitter_name != screen_name
+        current_person.twitter_name = screen_name
+        current_person.save!
+        logger.info "#{current_person.name} changing twitter from #{current_person.twitter_name} to #{screen_name}"
+        flash[:notice] = "Your Twitter has been changed from #{current_person.twitter_name} to #{screen_name}"
+        changed = true
+      end
+    end
+
+    changed
+  end
+
+  def twitter_oauth_setup
+    require 'oauth'
+    require 'oauth/consumer'
+    @consumer_key = global_prefs.twitter_oauth_consumer_key
+    @consumer_secret = global_prefs.plaintext_twitter_oauth_consumer_secret
+    @consumer = OAuth::Consumer.new(@consumer_key, @consumer_secret, { :site => "http://twitter.com" })
+  end
+
+  def follow(twitter_id)
+    twitter_name = global_prefs.twitter_name
+    twitter_password = global_prefs.plaintext_twitter_password
+    twitter_api = global_prefs.twitter_api
+
+    twit = Twitter::Base.new(twitter_name,twitter_password, :api_host => twitter_api )
+    begin
+      twit.create_friendship(twitter_id)
+    rescue Twitter::CantConnect => e
+      logger.info "ERROR Twitter::CantConnect for [#{twitter_id}] (" + e.to_s + ")"
+    end
+  end
+
   def correct_person_and_no_accept_required
     request = Req.find(params[:id])
     redirect_to home_url unless request.person == current_person

app/models/preference.rb

@@ -18,19 +18,23 @@
 #
 
 class Preference < ActiveRecord::Base
-  attr_accessor :twitter_password
+  attr_accessor :twitter_password,
+                :twitter_oauth_consumer_secret
   attr_accessible :app_name, :server_name, :domain, :smtp_server, 
                   :exception_notification,
                   :email_notifications, :email_verifications, :analytics,
                   :about, :demo, :whitelist, :gmail, :registration_notification,
                   :practice, :steps, :questions, :memberships, :contact,
-                  :twitter_name, :twitter_password, :twitter_api
+                  :twitter_name, :twitter_password, :twitter_api,
+                  :twitter_oauth_consumer_key, :twitter_oauth_consumer_secret
 
   validates_presence_of :domain,       :if => :using_email?
   validates_presence_of :smtp_server,  :if => :using_email?
   validates_presence_of :twitter_api,  :if => :using_twitter?
 
   before_save :encrypt_twitter_password
+  before_save :encrypt_twitter_oauth_consumer_secret
+
   before_validation :set_default_twitter_api_if_using_twitter
 
   # Can we send mail with the present configuration?
@@ -42,6 +46,10 @@ def plaintext_twitter_password
     decrypt(crypted_twitter_password)
   end
 
+  def plaintext_twitter_oauth_consumer_secret
+    decrypt(crypted_twitter_oauth_consumer_secret)
+  end
+
   private
     def decrypt(password)
       Crypto::Key.from_file("#{RAILS_ROOT}/rsa_key").decrypt(password)
@@ -61,6 +69,11 @@ def encrypt_twitter_password
       self.crypted_twitter_password = encrypt(twitter_password)
     end
 
+    def encrypt_twitter_oauth_consumer_secret
+      return if twitter_oauth_consumer_secret.blank?
+      self.crypted_twitter_oauth_consumer_secret = encrypt(twitter_oauth_consumer_secret)
+    end
+
     def set_default_twitter_api_if_using_twitter
       self.twitter_api = 'twitter.com' if self.twitter_api.blank?
     end

app/views/admin/preferences/edit.html.erb

@@ -37,6 +37,16 @@
       <%= f.password_field :twitter_password %>
     </div>
 
+    <div class="form_row">
+      <label for="twitter_oauth_consumer_key">Twitter OAuth Consumer Key</label>
+      <%= f.text_field :twitter_oauth_consumer_key %>
+    </div>
+
+    <div class="form_row">
+      <label for="twitter_password">Twitter OAuth Consumer Secret</label>
+      <%= f.password_field :twitter_oauth_consumer_secret %>
+    </div>
+
     <div class="form_row">
       <label for="twitter_api">Twitter api</label>
       <%= f.text_field :twitter_api %>

app/views/admin/preferences/show.html.erb

@@ -25,6 +25,11 @@
   <%=h @preferences.twitter_name %>
 </p>
 
+<p>
+  <b>Twitter oauth consumer key:</b>
+  <%=h @preferences.twitter_oauth_consumer_key %>
+</p>
+
 <p>
   <b>Twitter api:</b>
   <%=h @preferences.twitter_api %>

app/views/reqs/index.html.erb

@@ -1,5 +1,9 @@
 <%- column_div :type => :primary do -%>
+<% if global_prefs.twitter_name.blank? %>
 <h2>Requests</h2>
+<% else %>
+  <h2>Requests &nbsp;&nbsp;<%= link_to( image_tag("twitter.gif", :border => 0, :title => "follow me"), twitter_oauth_client_path ) %></h2>
+<%- end -%>
 
 <%- if @reqs.empty? -%>
     <h3 class="blankslate">No requests (yet!)</h3>

config/routes.rb

@@ -3,6 +3,9 @@
 
   map.resources :bids
 
+  map.twitter_oauth_client '/reqs/twitter_oauth_client', :controller => "reqs", :action => "twitter_oauth_client"
+  map.twitter_oauth_callback '/reqs/twitter_oauth_callback', :controller => "reqs", :action => "twitter_oauth_callback"
+
   map.resources :reqs do |req|
     req.resources :bids
   end

db/migrate/20090216032013_add_twitter_consumer_creds_preferences.rb

@@ -0,0 +1,11 @@
+class AddTwitterConsumerCredsPreferences < ActiveRecord::Migration
+  def self.up
+    add_column :preferences, :twitter_oauth_consumer_key, :string
+    add_column :preferences, :crypted_twitter_oauth_consumer_secret, :string
+  end
+
+  def self.down
+    remove_column :preferences, :twitter_oauth_consumer_key
+    remove_column :preferences, :crypted_twitter_oauth_consumer_secret
+  end
+end