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<?php
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/**
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* @file
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* Provide a "Multimedia asset" field.
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*/
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/**
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* Implements hook_field_info().
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*/
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function mediafield_field_info() {
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return array(
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'media' => array(
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'label' => t('Multimedia asset'),
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'description' => t('This field stores a reference to a multimedia asset.'),
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'settings' => array(),
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'instance_settings' => array(
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'file_extensions' => variable_get('file_entity_default_allowed_extensions', 'jpg jpeg gif png txt doc docx xls xlsx pdf ppt pptx pps ppsx odt ods odp mp3 mov mp4 m4a m4v mpeg avi ogg oga ogv weba webp webm'),
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),
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'default_widget' => 'media_generic',
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'default_formatter' => 'media',
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'property_type' => 'field_item_file',
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'property_callbacks' => array('entity_metadata_field_file_callback'),
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),
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);
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}
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/**
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* Implements hook_field_widget_info_alter().
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*
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* Alter the media file selector so it is available for media fields.
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*/
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function mediafield_field_widget_info_alter(&$info) {
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$info['media_generic']['field types'][] = 'media';
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}
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/**
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* Implements hook_field_instance_settings_form().
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*/
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function mediafield_field_instance_settings_form($field, $instance) {
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$settings = $instance['settings'];
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// Make the extension list a little more human-friendly by comma-separation.
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$extensions = str_replace(' ', ', ', $settings['file_extensions']);
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$form['file_extensions'] = array(
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'#type' => 'textfield',
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'#title' => t('Allowed file extensions for uploaded files'),
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'#default_value' => $extensions,
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'#description' => t('Separate extensions with a space or comma and do not include the leading dot.'),
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'#element_validate' => array('_file_generic_settings_extensions'),
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// By making this field required, we prevent a potential security issue
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// that would allow files of any type to be uploaded.
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'#required' => TRUE,
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'#maxlength' => 255,
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);
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return $form;
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}
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/**
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* Implements hook_field_is_empty().
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*/
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function mediafield_field_is_empty($item, $field) {
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return empty($item['fid']);
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}
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/**
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* Implements hook_field_formatter_info().
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*/
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function mediafield_field_formatter_info() {
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$formatters = array(
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'media' => array(
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'label' => t('Media'),
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'field types' => array('media'),
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'settings' => array('file_view_mode' => 'default'),
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),
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);
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return $formatters;
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}
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/**
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* Implements hook_field_formatter_settings_form().
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*/
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function mediafield_field_formatter_settings_form($field, $instance, $view_mode, $form, &$form_state) {
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$display = $instance['display'][$view_mode];
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$settings = $display['settings'];
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$element = array();
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if ($display['type'] == 'media') {
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$entity_info = entity_get_info('file');
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$options = array('default' => t('Default'));
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foreach ($entity_info['view modes'] as $file_view_mode => $file_view_mode_info) {
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$options[$file_view_mode] = $file_view_mode_info['label'];
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}
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$element['file_view_mode'] = array(
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'#title' => t('File view mode'),
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'#type' => 'select',
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'#default_value' => $settings['file_view_mode'],
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'#options' => $options,
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);
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}
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return $element;
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}
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/**
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* Implements hook_field_formatter_settings_summary().
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*/
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function mediafield_field_formatter_settings_summary($field, $instance, $view_mode) {
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$display = $instance['display'][$view_mode];
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$settings = $display['settings'];
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$summary = '';
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if ($display['type'] == 'media') {
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$entity_info = entity_get_info('file');
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$file_view_mode_label = isset($entity_info['view modes'][$settings['file_view_mode']]) ? $entity_info['view modes'][$settings['file_view_mode']]['label'] : t('Default');
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$summary = t('File view mode: @view_mode', array('@view_mode' => $file_view_mode_label));
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}
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return $summary;
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}
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/**
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* Implements hook_field_formatter_view().
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*/
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function mediafield_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
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$element = array();
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$files = array();
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foreach ($items as $delta => $item) {
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if (!empty($item['file'])) {
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$files[$item['fid']] = $item['file'];
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}
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}
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if (!empty($files)) {
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$output = file_view_multiple($files, $display['settings']['file_view_mode'], 0, $langcode);
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// Remove the first level from the output array.
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$element = reset($output);
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}
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return $element;
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}
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/**
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* Implements hook_field_prepare_view().
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*/
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function mediafield_field_prepare_view($entity_type, $entities, $field, $instances, $langcode, &$items) {
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// Collect all file IDs that need loading.
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$fids = array();
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foreach ($entities as $id => $entity) {
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// Load the files from the files table.
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foreach ($items[$id] as $delta => $item) {
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if (!empty($item['fid'])) {
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$fids[] = $item['fid'];
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}
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}
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}
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// Load the file entities.
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$files = file_load_multiple($fids);
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// Add the loaded file entities to the field item array.
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foreach ($entities as $id => $entity) {
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foreach ($items[$id] as $delta => $item) {
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// If the file does not exist, mark the entire item as empty.
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if (empty($files[$item['fid']])) {
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unset($items[$id][$delta]);
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}
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else {
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$items[$id][$delta]['file'] = $files[$item['fid']];
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}
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}
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}
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}
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/**
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* Implements hook_field_validate().
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*
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* Possible error codes:
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* - 'media_remote_file_type_not_allowed': The remote file is not an allowed
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* file type.
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*/
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function mediafield_field_validate($obj_type, $object, $field, $instance, $langcode, $items, &$errors) {
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$allowed_types = array_keys(array_filter($instance['widget']['settings']['allowed_types']));
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// @TODO: merge in stuff from media_uri_value
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foreach ($items as $delta => $item) {
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if (empty($item['fid'])) {
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return TRUE;
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//@TODO: make support for submiting with just a URI here?
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}
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$file = file_load($item['fid']);
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// Only validate allowed types if the file is remote and not local.
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if (!file_entity_file_is_local($file)) {
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if (!in_array($file->type, $allowed_types)) {
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$errors[$field['field_name']][$langcode][$delta][] = array(
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'error' => 'media_remote_file_type_not_allowed',
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'message' => t('%name: Only remote files with the following types are allowed: %types-allowed.', array('%name' => t($instance['label']), '%types-allowed' => !empty($allowed_types) ? implode(', ', $allowed_types) : t('no file types selected'))),
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);
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}
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}
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}
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}
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/**
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* Implements_hook_field_widget_error().
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*/
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function mediafield_field_widget_error($element, $error, $form, &$form_state) {
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form_error($element['fid'], $error['message']);
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}
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/**
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* @todo The following hook_field_(insert|update|delete|delete_revision)
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* implementations are nearly identical to the File module implementations of
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* the same field hooks. The only differences are:
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* - We pass 'media' rather than 'file' as the module argument to the
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* file_usage_(add|delete)() functions.
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* - We do not delete the file / media entity when its usage count goes to 0.
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* We should submit a core patch to File module to make it flexible with
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* respect to the above, so that we can reuse its implementation rather than
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* duplicating it.
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*/
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/**
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* Implements hook_field_insert().
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*/
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function mediafield_field_insert($entity_type, $entity, $field, $instance, $langcode, &$items) {
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list($id, $vid, $bundle) = entity_extract_ids($entity_type, $entity);
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// Add a new usage of each uploaded file.
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foreach ($items as $item) {
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$file = (object) $item;
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file_usage_add($file, 'mediafield', $entity_type, $id);
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}
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}
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/**
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* Implements hook_field_update().
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*
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* Checks for files that have been removed from the object.
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*/
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function mediafield_field_update($entity_type, $entity, $field, $instance, $langcode, &$items) {
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list($id, $vid, $bundle) = entity_extract_ids($entity_type, $entity);
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// On new revisions, all files are considered to be a new usage and no
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// deletion of previous file usages are necessary.
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if (!empty($entity->revision)) {
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foreach ($items as $item) {
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$file = (object) $item;
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file_usage_add($file, 'mediafield', $entity_type, $id);
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}
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return;
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}
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// Build a display of the current FIDs.
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$current_fids = array();
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foreach ($items as $item) {
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$current_fids[] = $item['fid'];
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}
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// Compare the original field values with the ones that are being saved.
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$original_fids = array();
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if (!empty($entity->original->{$field['field_name']}[$langcode])) {
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foreach ($entity->original->{$field['field_name']}[$langcode] as $original_item) {
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$original_fids[] = $original_item['fid'];
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if (isset($original_item['fid']) && !in_array($original_item['fid'], $current_fids)) {
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// Decrement the file usage count by 1.
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$file = (object) $original_item;
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file_usage_delete($file, 'mediafield', $entity_type, $id, 1);
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}
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}
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}
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// Add new usage entries for newly added files.
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foreach ($items as $item) {
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if (!in_array($item['fid'], $original_fids)) {
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$file = (object) $item;
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file_usage_add($file, 'mediafield', $entity_type, $id);
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}
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}
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}
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/**
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* Implements hook_field_delete().
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*/
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function mediafield_field_delete($entity_type, $entity, $field, $instance, $langcode, &$items) {
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list($id, $vid, $bundle) = entity_extract_ids($entity_type, $entity);
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// Delete all file usages within this entity.
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foreach ($items as $delta => $item) {
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$file = (object) $item;
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file_usage_delete($file, 'mediafield', $entity_type, $id, 0);
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}
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}
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/**
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* Implements hook_field_delete_revision().
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*/
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function mediafield_field_delete_revision($entity_type, $entity, $field, $instance, $langcode, &$items) {
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list($id, $vid, $bundle) = entity_extract_ids($entity_type, $entity);
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foreach ($items as $delta => $item) {
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// @TODO: Not sure if this is correct
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$file = (object)$item;
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if (file_usage_delete($file, 'mediafield', $entity_type, $id, 1)) {
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$items[$delta] = NULL;
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}
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}
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}
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/**
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* Implements hook_views_api().
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*/
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function mediafield_views_api() {
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return array(
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'api' => 3,
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);
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}
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