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<?php
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/**
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* @file
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* Functions related to adding UUID support to embedded media.
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*/
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/**
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* Implements hook_entity_uuid_load().
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*/
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function media_wysiwyg_entity_uuid_load(&$entities, $entity_type) {
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// Go through all the entity's text fields and replace file IDs in media
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// tokens with the corresponding UUID.
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foreach ($entities as $entity) {
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media_wysiwyg_filter_replace_tokens_in_all_text_fields($entity_type, $entity, 'media_wysiwyg_token_fid_to_uuid');
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}
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}
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/**
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* Implements hook_entity_uuid_presave().
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*/
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function media_wysiwyg_entity_uuid_presave(&$entity, $entity_type) {
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// Go through all the entity's text fields and replace UUIDs in media tokens
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// with the corresponding file ID.
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media_wysiwyg_filter_replace_tokens_in_all_text_fields($entity_type, $entity, 'media_wysiwyg_token_uuid_to_fid');
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}
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/**
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* Replaces media tokens in an entity's text fields, using the specified callback function.
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*/
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function media_wysiwyg_filter_replace_tokens_in_all_text_fields($entity_type, $entity, $callback) {
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$text_field_names = media_wysiwyg_filter_fields_with_text_filtering($entity_type, $entity);
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foreach ($text_field_names as $field_name) {
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if (!empty($entity->{$field_name})) {
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$field = field_info_field($field_name);
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$all_languages = field_available_languages($entity_type, $field);
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$field_languages = array_intersect($all_languages, array_keys($entity->{$field_name}));
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foreach ($field_languages as $language) {
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if (!empty($entity->{$field_name}[$language])) {
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foreach ($entity->{$field_name}[$language] as &$item) {
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$item['value'] = preg_replace_callback(MEDIA_WYSIWYG_TOKEN_REGEX, $callback, $item['value']);
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}
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}
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}
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}
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}
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}
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/**
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* Callback to replace file IDs with UUIDs in a media token.
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*/
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function media_wysiwyg_token_fid_to_uuid($matches) {
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return _media_wysiwyg_token_uuid_replace($matches, 'entity_get_uuid_by_id');
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}
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/**
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* Callback to replace UUIDs with file IDs in a media token.
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*/
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function media_wysiwyg_token_uuid_to_fid($matches) {
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return _media_wysiwyg_token_uuid_replace($matches, 'entity_get_id_by_uuid');
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}
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/**
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* Helper function to replace UUIDs with file IDs or vice versa.
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*
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* @param array $matches
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* An array of matches for media tokens, from a preg_replace_callback()
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* callback function.
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* @param string $entity_uuid_function
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* Either 'entity_get_uuid_by_id' (to replace file IDs with UUIDs in the
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* token) or 'entity_get_id_by_uuid' (to replace UUIDs with file IDs).
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*
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* @return string
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* A string representing the JSON-encoded token, with the appropriate
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* replacement between file IDs and UUIDs.
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*/
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function _media_wysiwyg_token_uuid_replace($matches, $entity_uuid_function) {
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$tag = $matches[0];
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$tag = str_replace(array('[[', ']]'), '', $tag);
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$tag_info = drupal_json_decode($tag);
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if (isset($tag_info['fid'])) {
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if ($new_ids = $entity_uuid_function('file', array($tag_info['fid']))) {
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$new_id = reset($new_ids);
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$tag_info['fid'] = $new_id;
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}
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}
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return '[[' . drupal_json_encode($tag_info) . ']]';
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}
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