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<?php
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/**
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* @file
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* Install file for the entity API.
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*/
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/**
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* Implements hook_enable().
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*/
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function entity_enable() {
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// Create cache tables for entities that support Entity cache module.
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entity_entitycache_installed_modules();
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}
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/**
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* Implements hook_uninstall().
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*/
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function entity_uninstall() {
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// Delete variables.
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variable_del('entity_rebuild_on_flush');
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}
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/**
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* The entity API modules have been merged into a single module.
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*/
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function entity_update_7000() {
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// This empty update is required such that all caches are cleared as
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// necessary.
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}
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/**
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* Remove the deprecated 'entity_defaults_built' variable.
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*/
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function entity_update_7001() {
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variable_del('entity_defaults_built');
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}
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/**
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* Clear caches and rebuild registry.
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*/
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function entity_update_7002() {
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// Do nothing, update.php clears cache for us in case there is an update.
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}
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/**
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* Create cache tables for entities that support Entity cache module.
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*/
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function entity_update_7003() {
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entity_entitycache_installed_modules();
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}
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/**
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* Create cache tables for entities of modules that support Entity cache module.
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*
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* @param $modules
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* (optional) An array of module names that have been installed.
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* If not specified, try to add cache tables for all modules.
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*/
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function entity_entitycache_installed_modules($modules = NULL) {
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if (!module_exists('entitycache')) {
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return;
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}
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// If no modules are specified or if entitycache is being installed,
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// try to add entitycache tables for supporting entities of all modules.
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if (!isset($modules) || in_array('entitycache', $modules)) {
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$modules = module_list();
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}
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// Get all installed modules that support entity cache.
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$entitycache_module_info = _entity_entitycache_get_module_info($modules);
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// For uninstallation of modules, we need to keep a list of tables we created
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// per module providing the entity type.
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$tables_created = variable_get('entity_cache_tables_created');
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foreach ($entitycache_module_info as $module => $module_entitycache_entities) {
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foreach ($module_entitycache_entities as $entity_type => $entity_info) {
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// Do not break modules that create the cache tables for themselves.
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if (!db_table_exists('cache_entity_' . $entity_type)) {
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$schema = drupal_get_schema_unprocessed('system', 'cache');
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$schema['description'] = 'Cache table used to store' . $entity_type . ' entity records.';
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db_create_table('cache_entity_' . $entity_type, $schema);
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$tables_created[$module][] = 'cache_entity_' . $entity_type;
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}
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}
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}
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variable_set('entity_cache_tables_created', $tables_created);
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}
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/**
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* Remove entity cache tables for entity types of uninstalled modules.
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*
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* @param $modules
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* (optional) An array of uninstalled modules. If not specified, try to remove
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* cache tables for all modules.
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*/
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function entity_entitycache_uninstalled_modules($modules = NULL) {
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// If no modules are specified or if entitycache is being uninstalled,
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// try to remove entitycache tables for supporting entities of all modules.
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if (!isset($modules) || in_array('entitycache', $modules)) {
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$modules = module_list();
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}
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$tables_created = variable_get('entity_cache_tables_created');
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foreach ($modules as $module) {
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if (!empty($tables_created[$module])) {
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foreach ($tables_created[$module] as $table) {
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db_drop_table($table);
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}
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unset($tables_created[$module]);
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}
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}
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variable_set('entity_cache_tables_created', $tables_created);
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}
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/**
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* Helper to fetch entity info about entity types that use caching.
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*/
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function _entity_entitycache_get_module_info($modules) {
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// Prepare a keyed array of all modules with their entity types and infos.
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// Structure: [module][entity][info]
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$entity_crud_info = entity_crud_get_info();
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$info = array();
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foreach ($entity_crud_info as $entity_name => $entity_info) {
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// Make sure that the entity info specifies a module and supports entitycache.
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if (!isset($entity_info['module']) || empty($entity_info['entity cache'])) {
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continue;
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}
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$module = $entity_info['module'];
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// Only treat installed modules.
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if (!in_array($module, $modules)) {
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continue;
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}
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// Add the entity info to the module key.
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if (!isset($info[$module])) {
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$info[$module] = array();
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}
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$info[$module][$entity_name] = $entity_info;
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}
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return $info;
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}
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