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<?php
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/**
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* @file
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* Definition of views_handler_field_file_link_usage.
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*/
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/**
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* Field handler to present a link to view the usage of a file.
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*
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* @ingroup views_field_handlers
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*/
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class views_handler_field_file_link_usage extends views_handler_field_file_link {
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/**
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* {@inheritdoc}
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*/
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function option_definition() {
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$options = parent::option_definition();
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$options['count_entities_once'] = array('default' => TRUE);
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return $options;
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}
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/**
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* {@inheritdoc}
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*/
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function options_form(&$form, &$form_state) {
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$form['count_entities_once'] = array(
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'#type' => 'checkbox',
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'#title' => t('Count each unique entity once'),
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'#description' => t('Files can be used multiple times for an entity, especially when an entity is revisionable.'),
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'#default_value' => !empty($this->options['count_entities_once']),
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);
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parent::options_form($form, $form_state);
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}
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/**
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* Renders the link.
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*/
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function render_link($file, $values) {
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// Ensure user has access to update this file.
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if (!file_entity_access('update', $file)) {
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return;
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}
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$this->options['alter']['make_link'] = TRUE;
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$this->options['alter']['path'] = "file/$file->fid/usage";
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$this->options['alter']['query'] = drupal_get_destination();
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// Get total count for each file.
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$total_count = 0;
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$file_usage = file_usage_list($file);
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$count_entities_once = !empty($this->options['count_entities_once']);
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foreach ($file_usage as $module => $usage) {
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foreach ($usage as $entity_type => $entity_ids) {
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if ($count_entities_once) {
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// Just count each unique entity once.
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$total_count += count($entity_ids);
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}
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else {
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// Count multiple usages for each entity.
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foreach ($entity_ids as $id => $count) {
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$total_count += $count;
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}
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}
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}
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}
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$text = !empty($this->options['text']) ? $this->options['text'] : format_plural((int) $total_count, '1 place', '@count places');
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return $text;
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}
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}
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