Define permission to access sharer toolbar

[refs #71131]

sharer_toolbar.module

@@ -11,6 +11,10 @@
  */
 function sharer_toolbar_permission() {
   return array(
+    'access sharer toolbar' => array(
+      'title' => t('Access sharer toolbar'),
+      'description' => t('Choose who can acces sharers on front.'),
+    ),
     'admin sharer toolbar' => array(
       'title' => t('Administer sharer toolbar'),
       'description' => t('Choose which social sharer to be displayed and other stuffs.'),
@@ -120,6 +124,12 @@ function sharer_toolbar_sharer_toolbar_available_sharer() {
  * Implements hook_process_node().
  */
 function sharer_toolbar_process_node(&$variables) {
+
+  // Default value for sharer toolbar
+  $variables['sharer_toolbar'] = NULL;
+
+  // Generate only if user can access it
+  if (user_access('access sharer toolbar')) {
     module_load_include('inc', 'sharer_toolbar');
     $sharing_buttons = array();
 
@@ -136,7 +146,6 @@ function sharer_toolbar_process_node(&$variables) {
 
         // Transform URL
         _sharer_toolbar_generate_sharer_url($sharer['url'], $variables);
-
       }
 
       // or unset before sending array to template
@@ -155,7 +164,5 @@ function sharer_toolbar_process_node(&$variables) {
         'sharers' => $active_sharers,
       ));
     }
-  else {
-    $variables['sharer_toolbar'] = NULL;
   }
 }