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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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* Returns entity info for all supported core entities.
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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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// 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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entity_make_entity_local($entity_type, $entity);
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// Save the entity.
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$result = entity_save($entity_type, $entity);
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$hook = 'entity_uuid_save';
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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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$function($entity, $entity_type);
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}
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}
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return $result;
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}
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/**
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* Helper function to make an entity local (i.e. only local references).
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*/
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function entity_make_entity_local($entity_type, $entity) {
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$info = entity_get_info($entity_type);
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if (isset($info['uuid']) && $info['uuid'] == TRUE && !empty($info['entity keys']['uuid'])) {
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// Get the keys for local ID and UUID.
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$id_key = $info['entity keys']['id'];
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$uuid_key = $info['entity keys']['uuid'];
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// UUID entites must always provide a valid UUID when saving in order to do
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// the correct mapping between local and global IDs.
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if (empty($entity->{$uuid_key}) || !uuid_is_valid($entity->{$uuid_key})) {
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throw new UuidEntityException(t('Trying to save a @type entity with empty or invalid UUID.', array('@type' => $info['label'])));
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}
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// Fetch the local ID by its UUID.
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$ids = entity_get_id_by_uuid($entity_type, array($entity->{$uuid_key}));
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$id = reset($ids);
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// Set the correct local ID.
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if (empty($id)) {
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unset($entity->{$id_key});
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$entity->is_new = TRUE;
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}
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else {
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$entity->{$id_key} = $id;
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$entity->is_new = FALSE;
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}
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if (!empty($info['entity keys']['revision uuid'])) {
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// Get the keys for local revison ID and revision UUID.
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$vid_key = $info['entity keys']['revision'];
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$vuuid_key = $info['entity keys']['revision uuid'];
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$vid = NULL;
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// Fetch the local revision ID by its UUID.
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if (isset($entity->{$vuuid_key})) {
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// It's important to note that the revision UUID might be set here but
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// there might not exist a correspondant local revision ID in which case
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// we should unset the assigned revision ID to not confuse anyone with
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// revision IDs that might come from other environments.
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$vids = entity_get_id_by_uuid($entity_type, array($entity->{$vuuid_key}), TRUE);
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$vid = reset($vids);
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}
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if (empty($vid) && isset($entity->{$vid_key})) {
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unset($entity->{$vid_key});
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}
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elseif (!empty($vid)) {
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$entity->{$vid_key} = $vid;
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}
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// If the revision ID was unset before this (or just missing for some
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// reason) we fetch the current revision ID to build a better
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// representation of the node object we're working with.
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if ($entity_type == 'node' && !isset($entity->vid) && !$entity->is_new) {
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$entity->vid = db_select('node', 'n')
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->condition('n.nid', $entity->nid)
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->fields('n', array('vid'))
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->execute()
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->fetchField();
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}
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}
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// Let other modules transform UUID references to local ID references.
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$hook = 'entity_uuid_presave';
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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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$function($entity, $entity_type);
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}
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}
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}
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else {
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throw new UuidEntityException(t("Trying to operate on a @type entity, which doesn\'t support UUIDs.", array('@type' => $info['label'])));
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}
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345
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}
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346
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347
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/**
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348
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* Permanently delete the given entity by its UUID.
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349
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*
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350
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* This function depends on the Entity API module to provide the
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351
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* 'entity_delete()' function.
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352
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*
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353
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* @see entity_delete()
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*/
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function entity_uuid_delete($entity_type, $uuid) {
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// This function, and this function only, depends on the entity module.
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357
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if (!module_exists('entity')) {
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358
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throw new UuidEntityException(t('Calling %function requires the Entity API module (!link).', array('%function' => __FUNCTION__, '!link' => 'http://drupal.org/project/entity')));
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359
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}
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360
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361
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$info = entity_get_info($entity_type);
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362
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if (isset($info['uuid']) && $info['uuid'] == TRUE) {
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// Fetch the local ID by its UUID.
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$ids = entity_get_id_by_uuid($entity_type, array($uuid));
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365
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$id = reset($ids);
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$entity = entity_load($entity_type, array($id));
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367
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368
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// Let other modules transform UUID references to local ID references.
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$hook = 'entity_uuid_delete';
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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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$function($entity, $entity_type);
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}
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}
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if (empty($entity)) {
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return FALSE;
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}
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// Delete the entity.
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return entity_delete($entity_type, $id);
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}
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else {
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384
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throw new UuidEntityException(t("Trying to delete a @type entity, which doesn\'t support UUIDs.", array('@type' => $info['label'])));
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}
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386
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}
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387
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|
388
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/**
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389
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* Helper function that retrieves entity IDs by their UUIDs.
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390
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*
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391
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* @todo
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* Limit the query.
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*
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* @param string $entity_type
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* The entity type we should be dealing with.
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* @param array $uuids
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* List of UUIDs for which we should find their entity IDs. If $revision
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398
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* is TRUE this should be revision UUIDs instead.
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* @param bool $revision
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* If TRUE the revision IDs is returned instead.
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*
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402
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* @return array
|
403
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* List of entity IDs keyed by their UUIDs. If $revision is TRUE revision
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404
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* IDs and UUIDs are returned instead.
|
405
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*/
|
406
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function entity_get_id_by_uuid($entity_type, $uuids, $revision = FALSE) {
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407
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if (empty($uuids)) {
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408
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return array();
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409
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}
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410
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$cached_ids = entity_uuid_id_cache($entity_type, $uuids, $revision);
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411
|
if (count($cached_ids) == count($uuids)) {
|
412
|
return $cached_ids;
|
413
|
}
|
414
|
$uuids = array_diff($uuids, $cached_ids);
|
415
|
$info = entity_get_info($entity_type);
|
416
|
// Some contrib entities has no support for UUID, let's skip them.
|
417
|
if (empty($info['uuid'])) {
|
418
|
return array();
|
419
|
}
|
420
|
// Find out what entity keys to use.
|
421
|
if (!$revision) {
|
422
|
$table = $info['base table'];
|
423
|
$id_key = $info['entity keys']['id'];
|
424
|
$uuid_key = $info['entity keys']['uuid'];
|
425
|
}
|
426
|
elseif (isset($info['revision table'])) {
|
427
|
$table = $info['revision table'];
|
428
|
$id_key = $info['entity keys']['revision'];
|
429
|
$uuid_key = $info['entity keys']['revision uuid'];
|
430
|
}
|
431
|
// If we want revision IDs, but the entity doesn't support it. Return empty.
|
432
|
else {
|
433
|
return array();
|
434
|
}
|
435
|
|
436
|
// Get all UUIDs in one query.
|
437
|
$result = db_select($table, 't')
|
438
|
->fields('t', array($uuid_key, $id_key))
|
439
|
->condition($uuid_key, array_values($uuids), 'IN')
|
440
|
->execute()
|
441
|
->fetchAllKeyed();
|
442
|
$cache = &drupal_static('entity_uuid_id_cache', array());
|
443
|
$cache[$entity_type][(int) $revision] += $result;
|
444
|
return $result + $cached_ids;
|
445
|
}
|
446
|
|
447
|
/**
|
448
|
* Helper caching function.
|
449
|
*/
|
450
|
function entity_uuid_id_cache($entity_type, $ids, $revision) {
|
451
|
$cache = &drupal_static(__FUNCTION__, array());
|
452
|
if (empty($cache[$entity_type][(int) $revision])) {
|
453
|
$cache[$entity_type][(int) $revision] = array();
|
454
|
}
|
455
|
$cached_ids = $cache[$entity_type][(int) $revision];
|
456
|
return array_intersect_key($cached_ids, array_flip($ids));
|
457
|
}
|
458
|
|
459
|
/**
|
460
|
* Helper function that retrieves UUIDs by their entity IDs.
|
461
|
*
|
462
|
* @todo
|
463
|
* Limit the query.
|
464
|
*
|
465
|
* @param string $entity_type
|
466
|
* The entity type we should be dealing with.
|
467
|
* @param array $ids
|
468
|
* List of entity IDs for which we should find their UUIDs. If $revision
|
469
|
* is TRUE this should be revision IDs instead.
|
470
|
* @param bool $revision
|
471
|
* If TRUE the revision UUIDs is returned instead.
|
472
|
*
|
473
|
* @return array
|
474
|
* List of entity UUIDs keyed by their IDs. If $revision is TRUE revision
|
475
|
* IDs and UUIDs are returned instead.
|
476
|
*/
|
477
|
function entity_get_uuid_by_id($entity_type, $ids, $revision = FALSE) {
|
478
|
if (empty($ids)) {
|
479
|
return array();
|
480
|
}
|
481
|
$cached_ids = array_flip(entity_uuid_id_cache($entity_type, $ids, $revision));
|
482
|
if (count($cached_ids) == count($ids)) {
|
483
|
return $cached_ids;
|
484
|
}
|
485
|
$ids = array_diff($ids, $cached_ids);
|
486
|
|
487
|
$info = entity_get_info($entity_type);
|
488
|
// Some contrib entities has no support for UUID, let's skip them.
|
489
|
if (empty($info['uuid'])) {
|
490
|
return array();
|
491
|
}
|
492
|
// Find out what entity keys to use.
|
493
|
if (!$revision) {
|
494
|
$table = $info['base table'];
|
495
|
$id_key = $info['entity keys']['id'];
|
496
|
$uuid_key = $info['entity keys']['uuid'];
|
497
|
}
|
498
|
elseif (isset($info['revision table'])) {
|
499
|
$table = $info['revision table'];
|
500
|
$id_key = $info['entity keys']['revision'];
|
501
|
$uuid_key = $info['entity keys']['revision uuid'];
|
502
|
}
|
503
|
// If we want revision UUIDs, but the entity doesn't support it. Return empty.
|
504
|
else {
|
505
|
return array();
|
506
|
}
|
507
|
|
508
|
// Get all UUIDs in one query.
|
509
|
$result = db_select($table, 't')
|
510
|
->fields('t', array($id_key, $uuid_key))
|
511
|
->condition($id_key, array_values($ids), 'IN')
|
512
|
->execute()
|
513
|
->fetchAllKeyed();
|
514
|
$cache = &drupal_static('entity_uuid_id_cache', array());
|
515
|
$cache[$entity_type][(int) $revision] += array_flip($result);
|
516
|
return $result + $cached_ids;
|
517
|
}
|
518
|
|
519
|
/**
|
520
|
* Helper function to change entity properties from ID to UUID.
|
521
|
*
|
522
|
* We never change user UID 0 or 1 to UUIDs. Those are low level user accounts
|
523
|
* ("anonymous" and "root") that needs to be identified consistently across
|
524
|
* any system.
|
525
|
*
|
526
|
* @todo
|
527
|
* Add tests for this function.
|
528
|
*
|
529
|
* @param array $objects
|
530
|
* List of objects that should get $properties changed. Can be either an
|
531
|
* entity object or a field items array.
|
532
|
* @param string $entity_type
|
533
|
* The type of entity that all $properties refers to.
|
534
|
* @param array $properties
|
535
|
* An array of properties that should be changed. All properties must refer to
|
536
|
* the same type of entity (the one referenced in $entity_type).
|
537
|
*/
|
538
|
function entity_property_id_to_uuid(&$objects, $entity_type, $properties) {
|
539
|
if (!is_array($objects)) {
|
540
|
$things = array(&$objects);
|
541
|
}
|
542
|
else {
|
543
|
$things = &$objects;
|
544
|
}
|
545
|
if (!is_array($properties)) {
|
546
|
$properties = array($properties);
|
547
|
}
|
548
|
$ids = array();
|
549
|
$values = array();
|
550
|
$i = 0;
|
551
|
foreach ($things as &$object) {
|
552
|
foreach ($properties as $property) {
|
553
|
// This is probably an entity object.
|
554
|
if (is_object($object) && isset($object->{$property})) {
|
555
|
$values[$i] = &$object->{$property};
|
556
|
}
|
557
|
// This is probably a field items array.
|
558
|
elseif (is_array($object) && isset($object[$property])) {
|
559
|
$values[$i] = &$object[$property];
|
560
|
}
|
561
|
else {
|
562
|
$i++;
|
563
|
continue;
|
564
|
}
|
565
|
if (!($entity_type == 'user' && ($values[$i] == 0 || $values[$i] == 1))) {
|
566
|
$ids[] = $values[$i];
|
567
|
}
|
568
|
$i++;
|
569
|
}
|
570
|
}
|
571
|
$uuids = entity_get_uuid_by_id($entity_type, $ids);
|
572
|
foreach ($values as $i => $value) {
|
573
|
if (isset($uuids[$value])) {
|
574
|
$values[$i] = $uuids[$value];
|
575
|
}
|
576
|
}
|
577
|
}
|
578
|
|
579
|
/**
|
580
|
* Helper function to change entity properties from UUID to ID.
|
581
|
*
|
582
|
* @todo
|
583
|
* Add tests for this function.
|
584
|
*
|
585
|
* @param array $objects
|
586
|
* List of objects that should get $properties changed. Can be either an
|
587
|
* entity object or a field items array.
|
588
|
* @param string $entity_type
|
589
|
* The type of entity that all $properties refers to.
|
590
|
* @param array $properties
|
591
|
* An array of properties that should be changed. All properties must refer to
|
592
|
* the same type of entity (the one referenced in $entity_type).
|
593
|
*/
|
594
|
function entity_property_uuid_to_id(&$objects, $entity_type, $properties) {
|
595
|
if (!is_array($objects)) {
|
596
|
$things = array(&$objects);
|
597
|
}
|
598
|
else {
|
599
|
$things = &$objects;
|
600
|
}
|
601
|
if (!is_array($properties)) {
|
602
|
$properties = array($properties);
|
603
|
}
|
604
|
$uuids = array();
|
605
|
$values = array();
|
606
|
$i = 0;
|
607
|
foreach ($things as &$object) {
|
608
|
foreach ($properties as $property) {
|
609
|
// This is probably an entity object.
|
610
|
if (is_object($object) && isset($object->{$property})) {
|
611
|
$values[$i] = &$object->{$property};
|
612
|
}
|
613
|
// This is probably a field items array.
|
614
|
elseif (is_array($object) && isset($object[$property])) {
|
615
|
$values[$i] = &$object[$property];
|
616
|
}
|
617
|
else {
|
618
|
$i++;
|
619
|
continue;
|
620
|
}
|
621
|
if (uuid_is_valid($values[$i])) {
|
622
|
$uuids[] = $values[$i];
|
623
|
}
|
624
|
$i++;
|
625
|
}
|
626
|
}
|
627
|
$ids = entity_get_id_by_uuid($entity_type, $uuids);
|
628
|
foreach ($values as $i => $value) {
|
629
|
if (isset($ids[$value])) {
|
630
|
$values[$i] = $ids[$value];
|
631
|
}
|
632
|
}
|
633
|
}
|
634
|
|
635
|
/**
|
636
|
* @} End of "UUID support for Entity API"
|
637
|
*/
|