Only show the enabled auth provider.

app/assets/javascripts/app/controllers/login.js.coffee

@@ -12,7 +12,32 @@ class Index extends App.Controller
     @navupdate '#login'
 
   render: (data = {}) ->
-    @html App.view('login')(item: data)
+    auth_provider_all = {
+      facebook: {
+        url:    '/auth/facebook',
+        name:   'Facebook',
+        config: 'auth_facebook',
+      },
+      twitter: {
+        url:    '/auth/twitter',
+        name:   'Twitter',
+        config: 'auth_twitter',
+      },
+      linkedin: {
+        url:    '/auth/linkedin',
+        name:   'LinkedIn',
+        config: 'auth_linkedin',
+      },
+    }
+    auth_providers = []
+    for key, provider of auth_provider_all
+      if Config[provider.config] is true || Config[provider.config] is "true"
+        auth_providers.push provider
+    
+    @html App.view('login')(
+      item:           data,
+      auth_providers: auth_providers
+    )
     if $(@el).find('[name="username"]').val()
       $(@el).find('[name="username"]').focus()
   

app/assets/javascripts/app/views/login.jst.eco

@@ -15,6 +15,8 @@
         </div>
       </div>
       
+      
+      <% if !_.isEmpty(@auth_providers): %>
       <div class="row">
         <div class="span12">
           <p>--- or ---</p>
@@ -25,12 +27,13 @@
         <div class="span12">
           Sign in using
           <ul>
-            <li><a href="/auth/twitter">twitter</a></li>
+          <% for auth_provider in @auth_providers: %>
-            <li><a href="/auth/facebook">facebook</a></li>
+            <li><a href="<%= auth_provider.url %>"><%= auth_provider.name %></a></li>
-            <li><a href="/auth/linked_in">linkedin</a></li>
+          <% end %>
           </ul>
         </div>
       </div>
+      <% end %>
 
       <div class="row">
         <div class="span12">