danielebarchiesi@4: <?php
danielebarchiesi@4: 
danielebarchiesi@4: /**
danielebarchiesi@4:  * @file
danielebarchiesi@4:  * Provide Diff module field callbacks for the Entity Reference module.
danielebarchiesi@4:  */
danielebarchiesi@4: 
danielebarchiesi@4: /**
danielebarchiesi@4:  * Diff field callback for preloading entities.
danielebarchiesi@4:  */
danielebarchiesi@4: function entityreference_field_diff_view_prepare(&$old_items, &$new_items, $context) {
danielebarchiesi@4:   $field = $context['field'];
danielebarchiesi@4: 
danielebarchiesi@4:   // Build an array of entities ID.
danielebarchiesi@4:   $entity_ids = array();
danielebarchiesi@4:   foreach (array_merge_recursive($old_items, $new_items) as $item) {
danielebarchiesi@4:     $entity_ids[] = $item['target_id'];
danielebarchiesi@4:   }
danielebarchiesi@4: 
danielebarchiesi@4:   // Load those entities and loop through them to extract their labels.
danielebarchiesi@4:   $entities = entity_load($field['settings']['target_type'], $entity_ids);
danielebarchiesi@4: 
danielebarchiesi@4:   foreach ($old_items as $delta => $info) {
danielebarchiesi@4:     $old_items[$delta]['entity'] = isset($entities[$info['target_id']]) ? $entities[$info['target_id']] : NULL;
danielebarchiesi@4:   }
danielebarchiesi@4:   foreach ($new_items as $delta => $info) {
danielebarchiesi@4:     $new_items[$delta]['entity'] = isset($entities[$info['target_id']]) ? $entities[$info['target_id']] : NULL;
danielebarchiesi@4:   }
danielebarchiesi@4: }
danielebarchiesi@4: 
danielebarchiesi@4: /**
danielebarchiesi@4:  * Diff field callback for parsing entity field comparative values.
danielebarchiesi@4:  */
danielebarchiesi@4: function entityreference_field_diff_view($items, $context) {
danielebarchiesi@4:   $field = $context['field'];
danielebarchiesi@4:   $instance = $context['instance'];
danielebarchiesi@4:   $settings = $context['settings'];
danielebarchiesi@4:   $entity_type = $field['settings']['target_type'];
danielebarchiesi@4: 
danielebarchiesi@4:   $diff_items = array();
danielebarchiesi@4: 
danielebarchiesi@4:   // We populate as much as possible to allow the best flexability in any
danielebarchiesi@4:   // string overrides.
danielebarchiesi@4:   $t_args = array();
danielebarchiesi@4:   $t_args['!entity_type'] = $entity_type;
danielebarchiesi@4: 
danielebarchiesi@4:   $entity_info = entity_get_info($entity_type);
danielebarchiesi@4:   $t_args['!entity_type_label'] = $entity_info['label'];
danielebarchiesi@4: 
danielebarchiesi@4:   foreach ($items as $delta => $item) {
danielebarchiesi@4:     if (isset($item['entity'])) {
danielebarchiesi@4:       $output = array();
danielebarchiesi@4: 
danielebarchiesi@4:       list($id,, $bundle) = entity_extract_ids($entity_type, $item['entity']);
danielebarchiesi@4:       $t_args['!id'] = $id;
danielebarchiesi@4:       $t_args['!bundle'] = $bundle;
danielebarchiesi@4:       $t_args['!diff_entity_label'] = entity_label($entity_type, $item['entity']);
danielebarchiesi@4: 
danielebarchiesi@4:       $output['entity'] = t('!diff_entity_label', $t_args);
danielebarchiesi@4:       if ($settings['show_id']) {
danielebarchiesi@4:         $output['id'] = t('ID: !id', $t_args);
danielebarchiesi@4:       }
danielebarchiesi@4:       $diff_items[$delta] = implode('; ', $output);
danielebarchiesi@4:     }
danielebarchiesi@4:   }
danielebarchiesi@4: 
danielebarchiesi@4:   return $diff_items;
danielebarchiesi@4: }
danielebarchiesi@4: 
danielebarchiesi@4: /**
danielebarchiesi@4:  * Provide default field comparison options.
danielebarchiesi@4:  */
danielebarchiesi@4: function entityreference_field_diff_default_options($field_type) {
danielebarchiesi@4:   return array(
danielebarchiesi@4:     'show_id' => 0,
danielebarchiesi@4:   );
danielebarchiesi@4: }
danielebarchiesi@4: 
danielebarchiesi@4: /**
danielebarchiesi@4:  * Provide a form for setting the field comparison options.
danielebarchiesi@4:  */
danielebarchiesi@4: function entityreference_field_diff_options_form($field_type, $settings) {
danielebarchiesi@4:   $options_form = array();
danielebarchiesi@4:   $options_form['show_id'] = array(
danielebarchiesi@4:     '#type' => 'checkbox',
danielebarchiesi@4:     '#title' => t('Show ID'),
danielebarchiesi@4:     '#default_value' => $settings['show_id'],
danielebarchiesi@4:   );
danielebarchiesi@4:   return $options_form;
danielebarchiesi@4: }