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<?php
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/**
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* @file
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* Entity related functions for UUID module.
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*/
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/**
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* Entity UUID exception class.
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*/
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class UuidEntityException extends Exception {}
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/**
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* Helper function that returns entity info for all supported core modules,
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* relevant for UUID functionality.
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*
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* @see uuid_entity_info()
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* @see uuid_schema_alter()
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* @see uuid_install()
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* @see uuid_uninstall()
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*/
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function uuid_get_core_entity_info() {
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$info = array();
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$info['user'] = array(
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'base table' => 'users',
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'entity keys' => array(
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'uuid' => 'uuid',
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),
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);
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$info['node'] = array(
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'base table' => 'node',
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'revision table' => 'node_revision',
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'entity keys' => array(
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'uuid' => 'uuid',
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'revision uuid' => 'vuuid',
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),
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);
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if (module_exists('comment')) {
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$info['comment'] = array(
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'base table' => 'comment',
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'entity keys' => array(
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'uuid' => 'uuid',
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),
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);
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}
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if (module_exists('file')) {
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$info['file'] = array(
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'base table' => 'file_managed',
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'entity keys' => array(
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'uuid' => 'uuid',
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),
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);
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}
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if (module_exists('taxonomy')) {
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$info['taxonomy_term'] = array(
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'base table' => 'taxonomy_term_data',
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'entity keys' => array(
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'uuid' => 'uuid',
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),
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);
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}
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if (module_exists('field_collection')) {
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$info['field_collection_item'] = array(
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'base table' => 'field_collection_item',
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'entity keys' => array(
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'uuid' => 'uuid',
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),
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);
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}
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return $info;
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}
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/**
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* @defgroup uuid_entity_hooks UUID implementation of Entity API
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* @{
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*/
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/**
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* Implements hook_entity_info_alter().
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*
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* @see uuid_core_entity_info()
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*/
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function uuid_entity_info_alter(&$info) {
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foreach (uuid_get_core_entity_info() as $entity_type => $core_info) {
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$info[$entity_type]['uuid'] = TRUE;
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$info[$entity_type]['entity keys']['uuid'] = $core_info['entity keys']['uuid'];
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if (!empty($core_info['entity keys']['revision uuid'])) {
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$info[$entity_type]['entity keys']['revision uuid'] = $core_info['entity keys']['revision uuid'];
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}
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}
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}
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/**
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* Implements hook_entity_property_info_alter().
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*
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* This adds the UUID as an entity property for all UUID-enabled entities
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* which automatically gives us token and Rules integration.
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*/
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function uuid_entity_property_info_alter(&$info) {
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foreach (entity_get_info() as $entity_type => $entity_info) {
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if (isset($entity_info['uuid']) && $entity_info['uuid'] == TRUE
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&& !empty($entity_info['entity keys']['uuid'])
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&& empty($info[$entity_type]['properties'][$entity_info['entity keys']['uuid']])) {
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$info[$entity_type]['properties'][$entity_info['entity keys']['uuid']] = array(
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'label' => t('UUID'),
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'type' => 'text',
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'description' => t('The universally unique ID.'),
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'schema field' => $entity_info['entity keys']['uuid'],
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);
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if (!empty($entity_info['entity keys']['revision uuid'])
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&& empty($info[$entity_type]['properties'][$entity_info['entity keys']['revision uuid']])) {
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$info[$entity_type]['properties'][$entity_info['entity keys']['revision uuid']] = array(
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'label' => t('Revision UUID'),
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'type' => 'text',
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'description' => t("The revision's universally unique ID."),
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'schema field' => $entity_info['entity keys']['revision uuid'],
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);
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}
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}
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}
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}
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/**
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* Implements hook_entity_presave().
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*
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* This is where all UUID-enabled entities get their UUIDs.
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*/
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function uuid_entity_presave($entity, $entity_type) {
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$info = entity_get_info($entity_type);
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if (isset($info['uuid']) && $info['uuid'] == TRUE && !empty($info['entity keys']['uuid'])) {
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$uuid_key = $info['entity keys']['uuid'];
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if (empty($entity->{$uuid_key})) {
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$entity->{$uuid_key} = uuid_generate();
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}
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if (!empty($info['entity keys']['revision uuid'])) {
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$vuuid_key = $info['entity keys']['revision uuid'];
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// If this entity comes from a remote environment and have a revision UUID
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// that exists locally we should not create a new revision. Because
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// otherwise revisions won't be tracked universally.
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// TODO: Move code dependent on the uuid_services module into it's own
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// implementation of hook_entity_presave().
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if (!empty($entity->uuid_services) && isset($entity->{$vuuid_key})) {
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$vuuid_exists = (bool) entity_get_id_by_uuid($entity_type, array($entity->{$vuuid_key}), TRUE);
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if ($vuuid_exists) {
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$entity->revision = FALSE;
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}
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}
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if ((isset($entity->revision) && $entity->revision == TRUE && empty($entity->uuid_services)) || empty($entity->{$vuuid_key})) {
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$entity->{$vuuid_key} = uuid_generate();
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}
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}
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}
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}
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/**
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* @} End of "UUID implementation of Entity API"
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*/
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/**
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* @defgroup uuid_entity_support UUID support for Entity API
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* @{
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* Functions that extends the Entity API with UUID support.
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*/
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/**
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* Load entities by their UUID, that only should containing UUID references.
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*
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* Optionally load revisions by their VUUID by passing it into $conditions.
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* Ex. $conditions['vuuid'][$vuuid]
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*
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* This function is mostly useful if you want to load an entity from the local
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* database that only should contain UUID references.
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*
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* @see entity_load()
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*/
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function entity_uuid_load($entity_type, $uuids = array(), $conditions = array(), $reset = FALSE) {
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// Allow Revision UUID to be passed in $conditions and translate.
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$entity_info[$entity_type] = entity_get_info($entity_type);
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$revision_key = $entity_info[$entity_type]['entity keys']['revision'];
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if (isset($entity_info[$entity_type]['entity keys']['revision uuid'])) {
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$revision_uuid_key = $entity_info[$entity_type]['entity keys']['revision uuid'];
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}
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if (isset($revision_uuid_key) && isset($conditions[$revision_uuid_key])) {
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$revision_id = entity_get_id_by_uuid($entity_type, array($conditions[$revision_uuid_key]), TRUE);
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$conditions[$revision_key] = $revision_id[$conditions[$revision_uuid_key]];
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unset($conditions[$revision_uuid_key]);
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}
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$ids = entity_get_id_by_uuid($entity_type, $uuids);
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$results = entity_load($entity_type, $ids, $conditions, $reset);
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$entities = array();
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// We need to do this little magic here, because objects are passed by
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// reference. And because hook_entity_uuid_load() has the intention changing
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// primary properties and fields from local IDs to UUIDs it will also change
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// DrupalDefaultEntityController::entityCache by reference which is a static
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// cache of entities. And that is not something we want.
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foreach ($results as $key => $entity) {
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// This will avoid passing our loaded entities by reference.
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$entities[$key] = clone $entity;
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}
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entity_make_entity_universal($entity_type, $entities);
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return $entities;
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}
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/**
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* Helper function to make an entity universal (i.e. only global references).
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*/
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function entity_make_entity_universal($entity_type, $entities) {
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// Let other modules transform local ID references to UUID references.
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if (!empty($entities)) {
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$hook = 'entity_uuid_load';
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foreach (module_implements($hook) as $module) {
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$function = $module . '_' . $hook;
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if (function_exists($function)) {
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$function($entities, $entity_type);
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}
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}
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}
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}
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/**
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* Permanently saves an entity by its UUID.
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*
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* This function depends on the Entity API module to provide the
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* 'entity_save()' function.
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*
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* This function is mostly useful if you want to save an entity into the local
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* database that only contains UUID references.
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*
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* @see entity_save()
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*/
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function entity_uuid_save($entity_type, $entity) {
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// This function, and this function only, depends on the entity module.
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if (!module_exists('entity')) {
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throw new UuidEntityException(t('Calling %function requires the Entity API module (!link).', array('%function' => __FUNCTION__, '!link' => 'http://drupal.org/project/entity')));
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}
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$info = entity_get_info($entity_type);
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$uuid_key = $info['entity keys']['uuid'];
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if (empty($entity->{$uuid_key}) || !uuid_is_valid($entity->{$uuid_key})) {
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watchdog('Entity UUID', 'Attempted to save an entity with an invalid UUID', array(), WATCHDOG_ERROR);
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return FALSE;
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}
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248
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// Falling back on the variable node_options_[type] is not something an API
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// function should take care of. With normal (non UUID) nodes this is dealt
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// with in the form submit handler, i.e. not in node_save().
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// But since using entity_uuid_save() usually means you're trying to manage
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// entities remotely we do respect this variable here to make it work as the
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// node form, but only if we explicitly haven't set $node->revision already.
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if ($entity_type == 'node' && !isset($entity->revision) && in_array('revision', variable_get('node_options_' . $entity->type, array()))) {
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$entity->revision = 1;
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}
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257
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258
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entity_make_entity_local($entity_type, $entity);
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259
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260
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// Save the entity.
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261
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entity_save($entity_type, $entity);
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262
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263
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$hook = 'entity_uuid_save';
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264
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foreach (module_implements($hook) as $module) {
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265
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$function = $module . '_' . $hook;
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266
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if (function_exists($function)) {
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267
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$function($entity, $entity_type);
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}
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269
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}
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270
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}
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271
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272
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/**
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273
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* Helper function to make an entity local (i.e. only local references).
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274
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*/
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275
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function entity_make_entity_local($entity_type, $entity) {
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$info = entity_get_info($entity_type);
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277
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if (isset($info['uuid']) && $info['uuid'] == TRUE && !empty($info['entity keys']['uuid'])) {
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278
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// Get the keys for local ID and UUID.
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279
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$id_key = $info['entity keys']['id'];
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280
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$uuid_key = $info['entity keys']['uuid'];
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281
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282
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// UUID entites must always provide a valid UUID when saving in order to do
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283
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// the correct mapping between local and global IDs.
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284
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if (empty($entity->{$uuid_key}) || !uuid_is_valid($entity->{$uuid_key})) {
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285
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throw new UuidEntityException(t('Trying to save a @type entity with empty or invalid UUID.', array('@type' => $info['label'])));
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286
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}
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287
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288
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// Fetch the local ID by its UUID.
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289
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$ids = entity_get_id_by_uuid($entity_type, array($entity->{$uuid_key}));
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290
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$id = reset($ids);
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291
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// Set the correct local ID.
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292
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if (empty($id)) {
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293
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unset($entity->{$id_key});
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294
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$entity->is_new = TRUE;
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295
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}
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296
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else {
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297
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$entity->{$id_key} = $id;
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298
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$entity->is_new = FALSE;
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299
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}
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300
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301
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if (!empty($info['entity keys']['revision uuid'])) {
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302
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// Get the keys for local revison ID and revision UUID.
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303
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$vid_key = $info['entity keys']['revision'];
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304
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$vuuid_key = $info['entity keys']['revision uuid'];
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305
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$vid = NULL;
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306
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// Fetch the local revision ID by its UUID.
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307
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if (isset($entity->{$vuuid_key})) {
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308
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// It's important to note that the revision UUID might be set here but
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309
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// there might not exist a correspondant local revision ID in which case
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310
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// we should unset the assigned revision ID to not confuse anyone with
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311
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// revision IDs that might come from other environments.
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312
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$vids = entity_get_id_by_uuid($entity_type, array($entity->{$vuuid_key}), TRUE);
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313
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$vid = reset($vids);
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|
314
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}
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315
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if (empty($vid) && isset($entity->{$vid_key})) {
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316
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unset($entity->{$vid_key});
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317
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}
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318
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elseif (!empty($vid)) {
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319
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$entity->{$vid_key} = $vid;
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320
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}
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321
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// If the revision ID was unset before this (or just missing for some
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322
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// reason) we fetch the current revision ID to build a better
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323
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// representation of the node object we're working with.
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324
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if ($entity_type == 'node' && !isset($entity->vid) && !$entity->is_new) {
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325
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$entity->vid = db_select('node', 'n')
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326
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->condition('n.nid', $entity->nid)
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327
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->fields('n', array('vid'))
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328
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->execute()
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329
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->fetchField();
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330
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}
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331
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}
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332
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|
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333
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// Let other modules transform UUID references to local ID references.
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334
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$hook = 'entity_uuid_presave';
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335
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foreach (module_implements($hook) as $module) {
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336
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$function = $module . '_' . $hook;
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337
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if (function_exists($function)) {
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338
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$function($entity, $entity_type);
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339
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}
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340
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}
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341
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}
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342
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else {
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343
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throw new UuidEntityException(t('Trying to operate on a @type entity, which doesn\'t support UUIDs.', array('@type' => $info['label'])));
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344
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}
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|
345
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}
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346
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|
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347
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/**
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|
348
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* Permanently delete the given entity by its UUID.
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|
349
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*
|
|
350
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* This function depends on the Entity API module to provide the
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351
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* 'entity_delete()' function.
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|
352
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*
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|
353
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* @see entity_delete()
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|
354
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*/
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|
355
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function entity_uuid_delete($entity_type, $uuid) {
|
|
356
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// This function, and this function only, depends on the entity module.
|
|
357
|
if (!module_exists('entity')) {
|
|
358
|
throw new UuidEntityException(t('Calling %function requires the Entity API module (!link).', array('%function' => __FUNCTION__, '!link' => 'http://drupal.org/project/entity')));
|
|
359
|
}
|
|
360
|
|
|
361
|
$info = entity_get_info($entity_type);
|
|
362
|
if (isset($info['uuid']) && $info['uuid'] == TRUE) {
|
|
363
|
// Fetch the local ID by its UUID.
|
|
364
|
$ids = entity_get_id_by_uuid($entity_type, array($uuid));
|
|
365
|
$id = reset($ids);
|
|
366
|
$entity = entity_load($entity_type, array($id));
|
|
367
|
|
|
368
|
// Let other modules transform UUID references to local ID references.
|
|
369
|
$hook = 'entity_uuid_delete';
|
|
370
|
foreach (module_implements($hook) as $module) {
|
|
371
|
$function = $module . '_' . $hook;
|
|
372
|
if (function_exists($function)) {
|
|
373
|
$function($entity, $entity_type);
|
|
374
|
}
|
|
375
|
}
|
|
376
|
|
|
377
|
if (empty($entity)) {
|
|
378
|
return FALSE;
|
|
379
|
}
|
|
380
|
// Delete the entity.
|
|
381
|
return entity_delete($entity_type, $id);
|
|
382
|
}
|
|
383
|
else {
|
|
384
|
throw new UuidEntityException(t('Trying to delete a @type entity, which doesn\'t support UUIDs.', array('@type' => $info['label'])));
|
|
385
|
}
|
|
386
|
}
|
|
387
|
|
|
388
|
/**
|
|
389
|
* Helper function that retrieves entity IDs by their UUIDs.
|
|
390
|
*
|
|
391
|
* @todo
|
|
392
|
* Statically cache as many IDs as possible and limit the query.
|
|
393
|
*
|
|
394
|
* @param $entity_type
|
|
395
|
* The entity type we should be dealing with.
|
|
396
|
* @param $uuids
|
|
397
|
* An array of UUIDs for which we should find their entity IDs. If $revision
|
|
398
|
* is TRUE this should be revision UUIDs instead.
|
|
399
|
* @param $revision
|
|
400
|
* If TRUE the revision IDs is returned instead.
|
|
401
|
* @return
|
|
402
|
* Array of entity IDs keyed by their UUIDs. If $revision is TRUE revision
|
|
403
|
* IDs and UUIDs are returned instead.
|
|
404
|
*/
|
|
405
|
function entity_get_id_by_uuid($entity_type, $uuids, $revision = FALSE) {
|
|
406
|
if (empty($uuids)) {
|
|
407
|
return array();
|
|
408
|
}
|
|
409
|
$info = entity_get_info($entity_type);
|
|
410
|
// Find out what entity keys to use.
|
|
411
|
if (!$revision) {
|
|
412
|
$table = $info['base table'];
|
|
413
|
$id_key = $info['entity keys']['id'];
|
|
414
|
$uuid_key = $info['entity keys']['uuid'];
|
|
415
|
}
|
|
416
|
elseif (isset($info['revision table'])) {
|
|
417
|
$table = $info['revision table'];
|
|
418
|
$id_key = $info['entity keys']['revision'];
|
|
419
|
$uuid_key = $info['entity keys']['revision uuid'];
|
|
420
|
}
|
|
421
|
// If we want revision IDs, but the entity doesn't support it. Return empty.
|
|
422
|
else {
|
|
423
|
return array();
|
|
424
|
}
|
|
425
|
|
|
426
|
// Get all UUIDs in one query.
|
|
427
|
return db_select($table, 't')
|
|
428
|
->fields('t', array($uuid_key, $id_key))
|
|
429
|
->condition($uuid_key, array_values($uuids), 'IN')
|
|
430
|
->execute()
|
|
431
|
->fetchAllKeyed();
|
|
432
|
}
|
|
433
|
|
|
434
|
/**
|
|
435
|
* Helper function that retrieves UUIDs by their entity IDs.
|
|
436
|
*
|
|
437
|
* @todo
|
|
438
|
* Statically cache as many IDs as possible and limit the query.
|
|
439
|
*
|
|
440
|
* @param $entity_type
|
|
441
|
* The entity type we should be dealing with.
|
|
442
|
* @param $ids
|
|
443
|
* An array of entity IDs for which we should find their UUIDs. If $revision
|
|
444
|
* is TRUE this should be revision IDs instead.
|
|
445
|
* @param $revision
|
|
446
|
* If TRUE the revision UUIDs is returned instead.
|
|
447
|
* @return
|
|
448
|
* Array of entity UUIDs keyed by their IDs. If $revision is TRUE revision
|
|
449
|
* IDs and UUIDs are returned instead.
|
|
450
|
*/
|
|
451
|
function entity_get_uuid_by_id($entity_type, $ids, $revision = FALSE) {
|
|
452
|
if (empty($ids)) {
|
|
453
|
return array();
|
|
454
|
}
|
|
455
|
$info = entity_get_info($entity_type);
|
|
456
|
// Find out what entity keys to use.
|
|
457
|
if (!$revision) {
|
|
458
|
$table = $info['base table'];
|
|
459
|
$id_key = $info['entity keys']['id'];
|
|
460
|
$uuid_key = $info['entity keys']['uuid'];
|
|
461
|
}
|
|
462
|
elseif (isset($info['revision table'])) {
|
|
463
|
$table = $info['revision table'];
|
|
464
|
$id_key = $info['entity keys']['revision'];
|
|
465
|
$uuid_key = $info['entity keys']['revision uuid'];
|
|
466
|
}
|
|
467
|
// If we want revision UUIDs, but the entity doesn't support it. Return empty.
|
|
468
|
else {
|
|
469
|
return array();
|
|
470
|
}
|
|
471
|
|
|
472
|
// Get all UUIDs in one query.
|
|
473
|
return db_select($table, 't')
|
|
474
|
->fields('t', array($id_key, $uuid_key))
|
|
475
|
->condition($id_key, array_values($ids), 'IN')
|
|
476
|
->execute()
|
|
477
|
->fetchAllKeyed();
|
|
478
|
}
|
|
479
|
|
|
480
|
/**
|
|
481
|
* Helper function to change entity properties from ID to UUID.
|
|
482
|
*
|
|
483
|
* We never change user UID 0 or 1 to UUIDs. Those are low level user accounts
|
|
484
|
* ("anonymous" and "root") that needs to be identified consistently across
|
|
485
|
* any system.
|
|
486
|
*
|
|
487
|
* @todo
|
|
488
|
* Add tests for this function.
|
|
489
|
*
|
|
490
|
* @param $objects
|
|
491
|
* An array of objects that should get $properties changed. Can be either an
|
|
492
|
* entity object or a field items array.
|
|
493
|
* @param $entity_type
|
|
494
|
* The type of entity that all $properties refers to.
|
|
495
|
* @param $properties
|
|
496
|
* An array of properties that should be changed. All properties must refer to
|
|
497
|
* the same type of entity (the one referenced in $entity_type).
|
|
498
|
*/
|
|
499
|
function entity_property_id_to_uuid(&$objects, $entity_type, $properties) {
|
|
500
|
if (!is_array($objects)) {
|
|
501
|
$things = array(&$objects);
|
|
502
|
}
|
|
503
|
else {
|
|
504
|
$things = &$objects;
|
|
505
|
}
|
|
506
|
if (!is_array($properties)) {
|
|
507
|
$properties = array($properties);
|
|
508
|
}
|
|
509
|
$ids = array();
|
|
510
|
$values = array();
|
|
511
|
$i = 0;
|
|
512
|
foreach ($things as &$object) {
|
|
513
|
foreach ($properties as $property) {
|
|
514
|
// This is probably an entity object.
|
|
515
|
if (is_object($object) && isset($object->{$property})) {
|
|
516
|
$values[$i] = &$object->{$property};
|
|
517
|
}
|
|
518
|
// This is probably a field items array.
|
|
519
|
elseif (is_array($object) && isset($object[$property])) {
|
|
520
|
$values[$i] = &$object[$property];
|
|
521
|
}
|
|
522
|
else {
|
|
523
|
$i++;
|
|
524
|
continue;
|
|
525
|
}
|
|
526
|
if (!($entity_type == 'user' && ($values[$i] == 0 || $values[$i] == 1))) {
|
|
527
|
$ids[] = $values[$i];
|
|
528
|
}
|
|
529
|
$i++;
|
|
530
|
}
|
|
531
|
}
|
|
532
|
$uuids = entity_get_uuid_by_id($entity_type, $ids);
|
|
533
|
foreach ($values as $i => $value) {
|
|
534
|
if (isset($uuids[$value])) {
|
|
535
|
$values[$i] = $uuids[$value];
|
|
536
|
}
|
|
537
|
}
|
|
538
|
}
|
|
539
|
|
|
540
|
/**
|
|
541
|
* Helper function to change entity properties from UUID to ID.
|
|
542
|
*
|
|
543
|
* @todo
|
|
544
|
* Add tests for this function.
|
|
545
|
*
|
|
546
|
* @param $objects
|
|
547
|
* An array of objects that should get $properties changed. Can be either an
|
|
548
|
* entity object or a field items array.
|
|
549
|
* @param $entity_type
|
|
550
|
* The type of entity that all $properties refers to.
|
|
551
|
* @param $properties
|
|
552
|
* An array of properties that should be changed. All properties must refer to
|
|
553
|
* the same type of entity (the one referenced in $entity_type).
|
|
554
|
*/
|
|
555
|
function entity_property_uuid_to_id(&$objects, $entity_type, $properties) {
|
|
556
|
if (!is_array($objects)) {
|
|
557
|
$things = array(&$objects);
|
|
558
|
}
|
|
559
|
else {
|
|
560
|
$things = &$objects;
|
|
561
|
}
|
|
562
|
if (!is_array($properties)) {
|
|
563
|
$properties = array($properties);
|
|
564
|
}
|
|
565
|
$uuids = array();
|
|
566
|
$values = array();
|
|
567
|
$i = 0;
|
|
568
|
foreach ($things as &$object) {
|
|
569
|
foreach ($properties as $property) {
|
|
570
|
// This is probably an entity object.
|
|
571
|
if (is_object($object) && isset($object->{$property})) {
|
|
572
|
$values[$i] = &$object->{$property};
|
|
573
|
}
|
|
574
|
// This is probably a field items array.
|
|
575
|
elseif (is_array($object) && isset($object[$property])) {
|
|
576
|
$values[$i] = &$object[$property];
|
|
577
|
}
|
|
578
|
else {
|
|
579
|
$i++;
|
|
580
|
continue;
|
|
581
|
}
|
|
582
|
if (uuid_is_valid($values[$i])) {
|
|
583
|
$uuids[] = $values[$i];
|
|
584
|
}
|
|
585
|
$i++;
|
|
586
|
}
|
|
587
|
}
|
|
588
|
$ids = entity_get_id_by_uuid($entity_type, $uuids);
|
|
589
|
foreach ($values as $i => $value) {
|
|
590
|
if (isset($ids[$value])) {
|
|
591
|
$values[$i] = $ids[$value];
|
|
592
|
}
|
|
593
|
}
|
|
594
|
}
|
|
595
|
|
|
596
|
/**
|
|
597
|
* @} End of "UUID support for Entity API"
|
|
598
|
*/
|
