Merge pull request #443 from jordandukart/7.x-smarter-links

Only render the regenerate under certain conditions.

islandora.module

@@ -1829,3 +1829,27 @@ function islandora_islandora_metadata_display_info() {
     ),
   );
 }
+
+/**
+ * Implements hook_islandora_datastream_access().
+ */
+function islandora_islandora_datastream_access($op, AbstractDatastream $datastream, $user) {
+  module_load_include('inc', 'islandora', 'includes/utilities');
+  $result = islandora_namespace_accessible($datastream->parent->id) && user_access($op, $user);
+
+  if ($result && $op == ISLANDORA_REGENERATE_DERIVATIVES) {
+    $applicable_hook = FALSE;
+    $object = $datastream->parent;
+    $hooks = islandora_invoke_hook_list(ISLANDORA_DERVIATIVE_CREATION_HOOK, $object->models, array($object));
+    foreach ($hooks as $hook) {
+      if ($hook['destination_dsid'] == $datastream->id && ((isset($hook['source_dsid']) && isset($object[$hook['source_dsid']]) && islandora_datastream_access(ISLANDORA_VIEW_OBJECTS, $object[$hook['source_dsid']], $user)) || (array_key_exists('source_dsid', $hook) && $hook['source_dsid'] == NULL))) {
+        $applicable_hook = TRUE;
+        break;
+      }
+    }
+    if (!$applicable_hook) {
+      $result = FALSE;
+    }
+  }
+  return $result;
+}

theme/theme.inc

@@ -79,14 +79,12 @@ function islandora_preprocess_islandora_default_edit(array &$variables) {
         'datastream' => $ds,
       )),
     );
-    if (islandora_datastream_access(ISLANDORA_REGENERATE_DERIVATIVES, $ds)) {
     $row[] = array(
       'class' => 'datastream-regenerate',
       'data' => theme('islandora_datastream_regenerate_link', array(
         'datastream' => $ds,
       )),
     );
-    }
     $rows[] = $row;
   }
   $caption = filter_xss($islandora_object->label) . ' - ' . $islandora_object->id;
@@ -444,14 +442,10 @@ function theme_islandora_datastream_version_link(array $vars) {
  */
 function theme_islandora_datastream_regenerate_link(array $vars) {
   $datastream = $vars['datastream'];
-  $object = $datastream->parent;
-  $hooks = islandora_invoke_hook_list(ISLANDORA_DERVIATIVE_CREATION_HOOK, $object->models, array($object));
-  foreach ($hooks as $hook) {
-    if ($hook['destination_dsid'] == $datastream->id) {
+  if (islandora_datastream_access(ISLANDORA_REGENERATE_DERIVATIVES, $datastream)) {
     return l(t('regenerate'), "islandora/object/{$datastream->parent->id}/datastream/{$datastream->id}/regenerate");
   }
 }
-}
 
 /**
  * Implements hook_preprocess().