Issue #9: Add views support.

entity_modified.module

@@ -5,6 +5,8 @@
  * module.
  */
 
+module_load_include('inc', 'entity_modified', 'includes/views/entity_modified.views');
+
 /**
  * Implements hook_entity_load().
  */
@@ -202,3 +204,13 @@ function entity_modified_modules_uninstalled($modules) {
       ->execute();
   }
 }
+
+/**
+ * Implements hook_views_api().
+ */
+function entity_modified_views_api() {
+  return array(
+    'api' => 3,
+    'path' => backdrop_get_path('module', 'entity_modified') . '/includes/views',
+  );
+}

includes/views/entity_modified.views.inc

@@ -0,0 +1,61 @@
+<?php
+/**
+ * @file
+ * Provide views data.
+ */
+
+/**
+ * Implements hook_views_data().
+ */
+function entity_modified_views_data() {
+  $data = array();
+
+  // The 'group' index will be used as a prefix in the UI for any of this
+  // table's fields, sort criteria, etc. so it's easy to tell where they came
+  // from.
+  $data['entity_modified']['table']['group'] = t('Entity modified');
+
+  $data['entity_modified']['modified'] = array(
+    'title' => t('Date updated'),
+    'help' => t('The date this entity was modified last.'),
+    'field' => array(
+      'handler' => 'views_handler_field_date',
+      'click sortable' => TRUE,
+    ),
+    'sort' => array(
+      'handler' => 'views_handler_sort_date',
+    ),
+    'filter' => array(
+      'handler' => 'views_handler_filter_date',
+    ),
+  );
+
+  return $data;
+}
+
+/**
+ * Implements hook_views_data_alter().
+ */
+function entity_modified_views_data_alter(&$data) {
+  // Inject our own field if it's not a property of the entity itself.
+  foreach (entity_get_info() as $entity_type => $entity_info) {
+    if (isset($entity_info['base table']) && isset($data[$entity_info['base table']]) && !entity_modified_property_name($entity_type)) {
+      $data[$entity_info['base table']]['entity_modified'] = array(
+        'title' => t('Date updated'),
+        'help' => t('The date this entity was last modified.'),
+        'relationship' => array(
+          'label' => t('Entity Modified'),
+          'title' => t('Entity Modified'),
+          'base' => 'entity_modified',
+          'base field' => 'entity_id',
+          // The entity specific properties to use for the join query.
+          'field' => $entity_info['entity keys']['id'],
+          'handler' => 'views_handler_relationship',
+          'extra' => array(
+            array('field' => 'entity_type', 'value' => $entity_type),
+          ),
+        ),
+      );
+    }
+  }
+}