687 lines
22 KiB
PHP
687 lines
22 KiB
PHP
<?php
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/*
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* @file
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* Definition of the FieldInfo class.
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*/
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/**
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* Provides field and instance definitions for the current runtime environment.
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*
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* A FieldInfo object is created and statically persisted through the request
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* by the _field_info_field_cache() function. The object properties act as a
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* "static cache" of fields and instances definitions.
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*
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* The preferred way to access definitions is through the getBundleInstances()
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* method, which keeps cache entries per bundle, storing both fields and
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* instances for a given bundle. Fields used in multiple bundles are duplicated
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* in several cache entries, and are merged into a single list in the memory
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* cache. Cache entries are loaded for bundles as a whole, optimizing memory
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* and CPU usage for the most common pattern of iterating over all instances of
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* a bundle rather than accessing a single instance.
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*
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* The getFields() and getInstances() methods, which return all existing field
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* and instance definitions, are kept mainly for backwards compatibility, and
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* should be avoided when possible, since they load and persist in memory a
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* potentially large array of information. In many cases, the lightweight
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* getFieldMap() method should be preferred.
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*/
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class FieldInfo {
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/**
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* Lightweight map of fields across entity types and bundles.
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*
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* @var array
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*/
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protected $fieldMap;
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/**
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* List of $field structures keyed by ID. Includes deleted fields.
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*
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* @var array
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*/
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protected $fieldsById = array();
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/**
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* Mapping of field names to the ID of the corresponding non-deleted field.
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*
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* @var array
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*/
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protected $fieldIdsByName = array();
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/**
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* Whether $fieldsById contains all field definitions or a subset.
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*
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* @var bool
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*/
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protected $loadedAllFields = FALSE;
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/**
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* Separately tracks requested field names or IDs that do not exist.
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*
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* @var array
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*/
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protected $unknownFields = array();
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/**
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* Instance definitions by bundle.
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*
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* @var array
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*/
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protected $bundleInstances = array();
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/**
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* Whether $bundleInstances contains all instances definitions or a subset.
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*
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* @var bool
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*/
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protected $loadedAllInstances = FALSE;
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/**
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* Separately tracks requested bundles that are empty (or do not exist).
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*
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* @var array
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*/
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protected $emptyBundles = array();
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/**
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* Extra fields by bundle.
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*
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* @var array
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*/
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protected $bundleExtraFields = array();
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/**
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* Clears the "static" and persistent caches.
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*/
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public function flush() {
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$this->fieldMap = NULL;
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$this->fieldsById = array();
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$this->fieldIdsByName = array();
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$this->loadedAllFields = FALSE;
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$this->unknownFields = array();
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$this->bundleInstances = array();
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$this->loadedAllInstances = FALSE;
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$this->emptyBundles = array();
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$this->bundleExtraFields = array();
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cache_clear_all('field_info:', 'cache_field', TRUE);
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}
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/**
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* Collects a lightweight map of fields across bundles.
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*
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* @return
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* An array keyed by field name. Each value is an array with two entries:
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* - type: The field type.
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* - bundles: The bundles in which the field appears, as an array with
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* entity types as keys and the array of bundle names as values.
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*/
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public function getFieldMap() {
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// Read from the "static" cache.
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if ($this->fieldMap !== NULL) {
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return $this->fieldMap;
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}
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// Read from persistent cache.
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if ($cached = cache_get('field_info:field_map', 'cache_field')) {
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$map = $cached->data;
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// Save in "static" cache.
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$this->fieldMap = $map;
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return $map;
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}
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$map = array();
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$query = db_query('SELECT fc.type, fci.field_name, fci.entity_type, fci.bundle FROM {field_config_instance} fci INNER JOIN {field_config} fc ON fc.id = fci.field_id WHERE fc.active = 1 AND fc.storage_active = 1 AND fc.deleted = 0 AND fci.deleted = 0');
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foreach ($query as $row) {
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$map[$row->field_name]['bundles'][$row->entity_type][] = $row->bundle;
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$map[$row->field_name]['type'] = $row->type;
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}
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// Save in "static" and persistent caches.
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$this->fieldMap = $map;
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if (lock_acquire('field_info:field_map')) {
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cache_set('field_info:field_map', $map, 'cache_field');
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lock_release('field_info:field_map');
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}
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return $map;
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}
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/**
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* Returns all active fields, including deleted ones.
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*
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* @return
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* An array of field definitions, keyed by field ID.
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*/
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public function getFields() {
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// Read from the "static" cache.
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if ($this->loadedAllFields) {
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return $this->fieldsById;
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}
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// Read from persistent cache.
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if ($cached = cache_get('field_info:fields', 'cache_field')) {
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$this->fieldsById = $cached->data;
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}
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else {
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// Collect and prepare fields.
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foreach (field_read_fields(array(), array('include_deleted' => TRUE)) as $field) {
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$this->fieldsById[$field['id']] = $this->prepareField($field);
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}
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// Store in persistent cache.
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if (lock_acquire('field_info:fields')) {
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cache_set('field_info:fields', $this->fieldsById, 'cache_field');
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lock_release('field_info:fields');
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}
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}
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// Fill the name/ID map.
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foreach ($this->fieldsById as $field) {
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if (!$field['deleted']) {
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$this->fieldIdsByName[$field['field_name']] = $field['id'];
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}
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}
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$this->loadedAllFields = TRUE;
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return $this->fieldsById;
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}
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/**
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* Retrieves all active, non-deleted instances definitions.
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*
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* @param $entity_type
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* (optional) The entity type.
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*
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* @return
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* If $entity_type is not set, all instances keyed by entity type and bundle
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* name. If $entity_type is set, all instances for that entity type, keyed
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* by bundle name.
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*/
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public function getInstances($entity_type = NULL) {
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// If the full list is not present in "static" cache yet.
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if (!$this->loadedAllInstances) {
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// Read from persistent cache.
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if ($cached = cache_get('field_info:instances', 'cache_field')) {
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$this->bundleInstances = $cached->data;
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}
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else {
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// Collect and prepare instances.
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// We also need to populate the static field cache, since it will not
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// be set by subsequent getBundleInstances() calls.
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$this->getFields();
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// Initialize empty arrays for all existing entity types and bundles.
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// This is not strictly needed, but is done to preserve the behavior of
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// field_info_instances() before http://drupal.org/node/1915646.
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foreach (field_info_bundles() as $existing_entity_type => $bundles) {
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foreach ($bundles as $bundle => $bundle_info) {
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$this->bundleInstances[$existing_entity_type][$bundle] = array();
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}
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}
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foreach (field_read_instances() as $instance) {
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$field = $this->getField($instance['field_name']);
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$instance = $this->prepareInstance($instance, $field['type']);
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$this->bundleInstances[$instance['entity_type']][$instance['bundle']][$instance['field_name']] = $instance;
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}
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// Store in persistent cache.
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if (lock_acquire('field_info:instances')) {
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cache_set('field_info:instances', $this->bundleInstances, 'cache_field');
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lock_release('field_info:instances');
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}
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}
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$this->loadedAllInstances = TRUE;
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}
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if (isset($entity_type)) {
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return isset($this->bundleInstances[$entity_type]) ? $this->bundleInstances[$entity_type] : array();
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}
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else {
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return $this->bundleInstances;
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}
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}
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/**
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* Returns a field definition from a field name.
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*
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* This method only retrieves active, non-deleted fields.
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*
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* @param $field_name
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* The field name.
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*
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* @return
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* The field definition, or NULL if no field was found.
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*/
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public function getField($field_name) {
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// Read from the "static" cache.
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if (isset($this->fieldIdsByName[$field_name])) {
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$field_id = $this->fieldIdsByName[$field_name];
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return $this->fieldsById[$field_id];
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}
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if (isset($this->unknownFields[$field_name])) {
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return;
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}
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// Do not check the (large) persistent cache, but read the definition.
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// Cache miss: read from definition.
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if ($field = field_read_field($field_name)) {
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$field = $this->prepareField($field);
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// Save in the "static" cache.
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$this->fieldsById[$field['id']] = $field;
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$this->fieldIdsByName[$field['field_name']] = $field['id'];
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return $field;
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}
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else {
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$this->unknownFields[$field_name] = TRUE;
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}
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}
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/**
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* Returns a field definition from a field ID.
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*
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* This method only retrieves active fields, deleted or not.
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*
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* @param $field_id
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* The field ID.
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*
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* @return
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* The field definition, or NULL if no field was found.
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*/
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public function getFieldById($field_id) {
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// Read from the "static" cache.
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if (isset($this->fieldsById[$field_id])) {
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return $this->fieldsById[$field_id];
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}
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if (isset($this->unknownFields[$field_id])) {
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return;
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}
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// No persistent cache, fields are only persistently cached as part of a
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// bundle.
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// Cache miss: read from definition.
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if ($fields = field_read_fields(array('id' => $field_id), array('include_deleted' => TRUE))) {
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$field = current($fields);
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$field = $this->prepareField($field);
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// Store in the static cache.
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$this->fieldsById[$field['id']] = $field;
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if (!$field['deleted']) {
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$this->fieldIdsByName[$field['field_name']] = $field['id'];
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}
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return $field;
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}
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else {
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$this->unknownFields[$field_id] = TRUE;
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}
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}
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/**
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* Retrieves the instances for a bundle.
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*
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* The function also populates the corresponding field definitions in the
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* "static" cache.
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*
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* @param $entity_type
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* The entity type.
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* @param $bundle
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* The bundle name.
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*
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* @return
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* The array of instance definitions, keyed by field name.
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*/
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public function getBundleInstances($entity_type, $bundle) {
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// Read from the "static" cache.
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if (isset($this->bundleInstances[$entity_type][$bundle])) {
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return $this->bundleInstances[$entity_type][$bundle];
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}
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if (isset($this->emptyBundles[$entity_type][$bundle])) {
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return array();
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}
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// Read from the persistent cache.
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if ($cached = cache_get("field_info:bundle:$entity_type:$bundle", 'cache_field')) {
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$info = $cached->data;
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// Extract the field definitions and save them in the "static" cache.
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foreach ($info['fields'] as $field) {
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if (!isset($this->fieldsById[$field['id']])) {
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$this->fieldsById[$field['id']] = $field;
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if (!$field['deleted']) {
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$this->fieldIdsByName[$field['field_name']] = $field['id'];
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}
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}
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}
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unset($info['fields']);
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// Store the instance definitions in the "static" cache'. Empty (or
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// non-existent) bundles are stored separately, so that they do not
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// pollute the global list returned by getInstances().
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if ($info['instances']) {
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$this->bundleInstances[$entity_type][$bundle] = $info['instances'];
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}
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else {
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$this->emptyBundles[$entity_type][$bundle] = TRUE;
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}
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return $info['instances'];
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}
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// Cache miss: collect from the definitions.
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$instances = array();
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// Collect the fields in the bundle.
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$params = array('entity_type' => $entity_type, 'bundle' => $bundle);
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$fields = field_read_fields($params);
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// This iterates on non-deleted instances, so deleted fields are kept out of
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// the persistent caches.
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foreach (field_read_instances($params) as $instance) {
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$field = $fields[$instance['field_name']];
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$instance = $this->prepareInstance($instance, $field['type']);
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$instances[$field['field_name']] = $instance;
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// If the field is not in our global "static" list yet, add it.
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if (!isset($this->fieldsById[$field['id']])) {
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$field = $this->prepareField($field);
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$this->fieldsById[$field['id']] = $field;
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$this->fieldIdsByName[$field['field_name']] = $field['id'];
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}
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}
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// Store in the 'static' cache'. Empty (or non-existent) bundles are stored
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// separately, so that they do not pollute the global list returned by
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// getInstances().
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if ($instances) {
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$this->bundleInstances[$entity_type][$bundle] = $instances;
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}
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else {
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$this->emptyBundles[$entity_type][$bundle] = TRUE;
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}
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// The persistent cache additionally contains the definitions of the fields
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// involved in the bundle.
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$cache = array(
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'instances' => $instances,
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'fields' => array()
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);
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foreach ($instances as $instance) {
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$cache['fields'][] = $this->fieldsById[$instance['field_id']];
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}
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if (lock_acquire("field_info:bundle:$entity_type:$bundle")) {
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cache_set("field_info:bundle:$entity_type:$bundle", $cache, 'cache_field');
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lock_release("field_info:bundle:$entity_type:$bundle");
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}
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return $instances;
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}
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/**
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* Retrieves the "extra fields" for a bundle.
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*
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* @param $entity_type
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* The entity type.
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* @param $bundle
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* The bundle name.
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*
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* @return
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* The array of extra fields.
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*/
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public function getBundleExtraFields($entity_type, $bundle) {
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// Read from the "static" cache.
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if (isset($this->bundleExtraFields[$entity_type][$bundle])) {
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return $this->bundleExtraFields[$entity_type][$bundle];
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}
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// Read from the persistent cache.
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if ($cached = cache_get("field_info:bundle_extra:$entity_type:$bundle", 'cache_field')) {
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$this->bundleExtraFields[$entity_type][$bundle] = $cached->data;
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return $this->bundleExtraFields[$entity_type][$bundle];
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}
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// Cache miss: read from hook_field_extra_fields(). Note: given the current
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// shape of the hook, we have no other way than collecting extra fields on
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// all bundles.
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$info = array();
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$extra = module_invoke_all('field_extra_fields');
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drupal_alter('field_extra_fields', $extra);
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// Merge in saved settings.
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if (isset($extra[$entity_type][$bundle])) {
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$info = $this->prepareExtraFields($extra[$entity_type][$bundle], $entity_type, $bundle);
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}
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// Store in the 'static' and persistent caches.
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$this->bundleExtraFields[$entity_type][$bundle] = $info;
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if (lock_acquire("field_info:bundle_extra:$entity_type:$bundle")) {
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cache_set("field_info:bundle_extra:$entity_type:$bundle", $info, 'cache_field');
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lock_release("field_info:bundle_extra:$entity_type:$bundle");
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}
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return $this->bundleExtraFields[$entity_type][$bundle];
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}
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/**
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* Prepares a field definition for the current run-time context.
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*
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* @param $field
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* The raw field structure as read from the database.
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*
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* @return
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* The field definition completed for the current runtime context.
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*/
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public function prepareField($field) {
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// Make sure all expected field settings are present.
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$field['settings'] += field_info_field_settings($field['type']);
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$field['storage']['settings'] += field_info_storage_settings($field['storage']['type']);
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// Add storage details.
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$details = (array) module_invoke($field['storage']['module'], 'field_storage_details', $field);
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drupal_alter('field_storage_details', $details, $field);
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$field['storage']['details'] = $details;
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// Populate the list of bundles using the field.
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$field['bundles'] = array();
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if (!$field['deleted']) {
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$map = $this->getFieldMap();
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if (isset($map[$field['field_name']])) {
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$field['bundles'] = $map[$field['field_name']]['bundles'];
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}
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}
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return $field;
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}
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/**
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* Prepares an instance definition for the current run-time context.
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*
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* @param $instance
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* The raw instance structure as read from the database.
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* @param $field_type
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* The field type.
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*
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* @return
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* The field instance array completed for the current runtime context.
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*/
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public function prepareInstance($instance, $field_type) {
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// Make sure all expected instance settings are present.
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$instance['settings'] += field_info_instance_settings($field_type);
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// Set a default value for the instance.
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if (field_behaviors_widget('default value', $instance) == FIELD_BEHAVIOR_DEFAULT && !isset($instance['default_value'])) {
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$instance['default_value'] = NULL;
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}
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// Prepare widget settings.
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$instance['widget'] = $this->prepareInstanceWidget($instance['widget'], $field_type);
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// Prepare display settings.
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foreach ($instance['display'] as $view_mode => $display) {
|
|
$instance['display'][$view_mode] = $this->prepareInstanceDisplay($display, $field_type);
|
|
}
|
|
|
|
// Fall back to 'hidden' for view modes configured to use custom display
|
|
// settings, and for which the instance has no explicit settings.
|
|
$entity_info = entity_get_info($instance['entity_type']);
|
|
$view_modes = array_merge(array('default'), array_keys($entity_info['view modes']));
|
|
$view_mode_settings = field_view_mode_settings($instance['entity_type'], $instance['bundle']);
|
|
foreach ($view_modes as $view_mode) {
|
|
if ($view_mode == 'default' || !empty($view_mode_settings[$view_mode]['custom_settings'])) {
|
|
if (!isset($instance['display'][$view_mode])) {
|
|
$instance['display'][$view_mode] = array(
|
|
'type' => 'hidden',
|
|
'label' => 'above',
|
|
'settings' => array(),
|
|
'weight' => 0,
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
return $instance;
|
|
}
|
|
|
|
/**
|
|
* Prepares widget properties for the current run-time context.
|
|
*
|
|
* @param $widget
|
|
* Widget specifications as found in $instance['widget'].
|
|
* @param $field_type
|
|
* The field type.
|
|
*
|
|
* @return
|
|
* The widget properties completed for the current runtime context.
|
|
*/
|
|
public function prepareInstanceWidget($widget, $field_type) {
|
|
$field_type_info = field_info_field_types($field_type);
|
|
|
|
// Fill in default values.
|
|
$widget += array(
|
|
'type' => $field_type_info['default_widget'],
|
|
'settings' => array(),
|
|
'weight' => 0,
|
|
);
|
|
|
|
$widget_type_info = field_info_widget_types($widget['type']);
|
|
// Fall back to default formatter if formatter type is not available.
|
|
if (!$widget_type_info) {
|
|
$widget['type'] = $field_type_info['default_widget'];
|
|
$widget_type_info = field_info_widget_types($widget['type']);
|
|
}
|
|
$widget['module'] = $widget_type_info['module'];
|
|
// Fill in default settings for the widget.
|
|
$widget['settings'] += field_info_widget_settings($widget['type']);
|
|
|
|
return $widget;
|
|
}
|
|
|
|
/**
|
|
* Adapts display specifications to the current run-time context.
|
|
*
|
|
* @param $display
|
|
* Display specifications as found in $instance['display']['a_view_mode'].
|
|
* @param $field_type
|
|
* The field type.
|
|
*
|
|
* @return
|
|
* The display properties completed for the current runtime context.
|
|
*/
|
|
public function prepareInstanceDisplay($display, $field_type) {
|
|
$field_type_info = field_info_field_types($field_type);
|
|
|
|
// Fill in default values.
|
|
$display += array(
|
|
'label' => 'above',
|
|
'settings' => array(),
|
|
'weight' => 0,
|
|
);
|
|
if (empty($display['type'])) {
|
|
$display['type'] = $field_type_info['default_formatter'];
|
|
}
|
|
if ($display['type'] != 'hidden') {
|
|
$formatter_type_info = field_info_formatter_types($display['type']);
|
|
// Fall back to default formatter if formatter type is not available.
|
|
if (!$formatter_type_info) {
|
|
$display['type'] = $field_type_info['default_formatter'];
|
|
$formatter_type_info = field_info_formatter_types($display['type']);
|
|
}
|
|
$display['module'] = $formatter_type_info['module'];
|
|
// Fill in default settings for the formatter.
|
|
$display['settings'] += field_info_formatter_settings($display['type']);
|
|
}
|
|
|
|
return $display;
|
|
}
|
|
|
|
/**
|
|
* Prepares 'extra fields' for the current run-time context.
|
|
*
|
|
* @param $extra_fields
|
|
* The array of extra fields, as collected in hook_field_extra_fields().
|
|
* @param $entity_type
|
|
* The entity type.
|
|
* @param $bundle
|
|
* The bundle name.
|
|
*
|
|
* @return
|
|
* The list of extra fields completed for the current runtime context.
|
|
*/
|
|
public function prepareExtraFields($extra_fields, $entity_type, $bundle) {
|
|
$entity_type_info = entity_get_info($entity_type);
|
|
$bundle_settings = field_bundle_settings($entity_type, $bundle);
|
|
$extra_fields += array('form' => array(), 'display' => array());
|
|
|
|
$result = array();
|
|
// Extra fields in forms.
|
|
foreach ($extra_fields['form'] as $name => $field_data) {
|
|
$settings = isset($bundle_settings['extra_fields']['form'][$name]) ? $bundle_settings['extra_fields']['form'][$name] : array();
|
|
if (isset($settings['weight'])) {
|
|
$field_data['weight'] = $settings['weight'];
|
|
}
|
|
$result['form'][$name] = $field_data;
|
|
}
|
|
|
|
// Extra fields in displayed entities.
|
|
$data = $extra_fields['display'];
|
|
foreach ($extra_fields['display'] as $name => $field_data) {
|
|
$settings = isset($bundle_settings['extra_fields']['display'][$name]) ? $bundle_settings['extra_fields']['display'][$name] : array();
|
|
$view_modes = array_merge(array('default'), array_keys($entity_type_info['view modes']));
|
|
foreach ($view_modes as $view_mode) {
|
|
if (isset($settings[$view_mode])) {
|
|
$field_data['display'][$view_mode] = $settings[$view_mode];
|
|
}
|
|
else {
|
|
$field_data['display'][$view_mode] = array(
|
|
'weight' => $field_data['weight'],
|
|
'visible' => TRUE,
|
|
);
|
|
}
|
|
}
|
|
unset($field_data['weight']);
|
|
$result['display'][$name] = $field_data;
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
}
|