checks if you already invited the person

app/models/services/facebook.rb

@@ -25,6 +25,14 @@ class Services::Facebook < Service
       data_h[d['id']] = {:name => d['name']}
     end
 
+    invitation_objects = Invitation.joins(:recipient).where(:sender_id => self.user_id,
+                                                            :users => {:invitation_service => 'facebook',
+                                                                       :invitation_identifier => data_h.keys})
+
+    invitation_objects.each do |inv|
+      data_h[inv.recipient.invitation_identifier][:invitation] = true
+    end
+
     service_objects = Services::Facebook.where(:uid => data_h.keys).includes(:user => :person)
     service_objects.each do |s|
       data_h[s.uid][:person] = s.user.person

app/views/services/finder.html.haml

@@ -28,6 +28,8 @@
                 :id => friend[:person].id},
                 :class => 'button',
                 :rel => 'facebox'
+            - elsif friend[:invitation]
+              = t('invitations.new.already_invited')
             - else
               = form_tag service_inviter_path do
                 = select_tag(:aspect_id, options_from_collection_for_select(@all_aspects, 'id', 'name'))

spec/models/services/facebook_spec.rb

@@ -74,7 +74,24 @@ JSON
         connect_users(@user, @user.aspects.first, @user2, @user2.aspects.first)
         @service.finder.values.first[:contact].should == @user.reload.contact_for(@user2.person)
       end
-    end
+      context 'already invited' do
+        before do
+          @user2.invitation_service = 'facebook'
+          @user2.invitation_identifier = @user2_fb_id
+          @user2.save!
+        end
+        it 'contains an invitation if invited' do
+          @inv = Invitation.create(:sender => @user, :recipient => @user2, :aspect => @user.aspects.first)
+          @service.finder.values.first[:invitation].should be_true
+        end
+        it 'does not find the user with a wrong identifier' do
+          @user2.invitation_identifier = 'dsaofhnadsoifnsdanf'
+          @user2.save
 
+          @inv = Invitation.create(:sender => @user, :recipient => @user2, :aspect => @user.aspects.first)
+          @service.finder.values.first[:invitation].should be_nil
+        end
+      end
+    end
   end
 end