Added availability checdk for fedora to system status.

fedora_repository.module

@@ -1758,3 +1758,48 @@ function fedora_repository_display_schema($file) {
   }
   return;
 }
+
+/**
+ * Implementation of hook_requirements().
+ *
+ * @return
+ *   An array describing the status of the site regarding available updates.
+ *   If there is no update data, only one record will be returned, indicating
+ *   that the status of core can't be determined. If data is available, there
+ *   will be two records: one for core, and another for all of contrib
+ *   (assuming there are any contributed modules or themes enabled on the
+ *   site). In addition to the fields expected by hook_requirements ('value',
+ *   'severity', and optionally 'description'), this array will contain a
+ *   'reason' attribute, which is an integer constant to indicate why the
+ *   given status is being returned (UPDATE_NOT_SECURE, UPDATE_NOT_CURRENT, or
+ *   UPDATE_UNKNOWN). This is used for generating the appropriate e-mail
+ *   notification messages during update_cron(), and might be useful for other
+ *   modules that invoke update_requirements() to find out if the site is up
+ *   to date or not.
+ *
+ * @see _update_message_text()
+ * @see _update_cron_notify()
+ */
+function fedora_repository_requirements($phase) {
+  global $base_url;
+  if ($phase == 'runtime') {
+    module_load_include('inc', 'fedora_repository', 'api/fedora_utils');
+    $requirement = array();
+    $requirement['title'] = t("Fedora server");
+    if (!fedora_available()) {
+      $requirement['value'] = ("Not available");
+      $requirement['severity'] = REQUIREMENT_ERROR;
+      $requirement['description'] = t('Ensure that Fedora is running and that the <a href="@collection-settings">collection settings</a> are correct.', 
+              array('@collection-settings' => $base_url.'/admin/settings/fedora_repository'));
+    }
+    else {
+      $requirement['value'] = ("Available");
+      $requirement['severity'] = REQUIREMENT_OK;
+    }
+    
+    
+  }
+  $requirements = array();
+  $requirements['fedora_available'] = $requirement;
+  return $requirements;
+}