476 lines
14 KiB
PHP
476 lines
14 KiB
PHP
<?php
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// $Id$
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/**
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* @file
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* Defines a field storage backend.
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*/
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/**
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* Implements hook_field_storage_info().
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*/
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function field_test_field_storage_info() {
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return array(
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'field_test_storage' => array(
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'label' => t('Test storage'),
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'description' => t('Dummy test storage backend. Stores field values in the variable table.'),
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),
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'field_test_storage_failure' => array(
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'label' => t('Test storage failure'),
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'description' => t('Dummy test storage backend. Always fails to create fields.'),
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),
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);
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}
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/**
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* Implements hook_field_storage_details().
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*/
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function field_test_field_storage_details($field, $instance) {
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$details = array();
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// Add field columns.
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$columns = array();
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foreach ((array) $field['columns'] as $column_name => $attributes) {
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$columns[$column_name] = $column_name;
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}
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return array(
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'drupal_variables' => array(
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'field_test_storage_data[FIELD_LOAD_CURRENT]' => $columns,
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'field_test_storage_data[FIELD_LOAD_REVISION]' => $columns,
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),
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);
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}
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/**
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* Implements hook_field_storage_details_alter().
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*
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* @see FieldAttachStorageTestCase::testFieldStorageDetailsAlter()
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*/
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function field_test_field_storage_details_alter(&$details, $field, $instance) {
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// For testing, storage details are changed only because of the field name.
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if ($field['field_name'] == 'field_test_change_my_details') {
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$columns = array();
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foreach ((array) $field['columns'] as $column_name => $attributes) {
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$columns[$column_name] = $column_name;
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}
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$details['drupal_variables'] = array(
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FIELD_LOAD_CURRENT => array(
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'moon' => $columns,
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),
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FIELD_LOAD_REVISION => array(
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'mars' => $columns,
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),
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);
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}
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}
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/**
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* Helper function: stores or retrieves data from the 'storage backend'.
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*/
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function _field_test_storage_data($data = NULL) {
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if (is_null($data)) {
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return variable_get('field_test_storage_data', array());
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}
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else {
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variable_set('field_test_storage_data', $data);
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}
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}
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/**
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* Implements hook_field_storage_load().
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*/
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function field_test_field_storage_load($obj_type, $objects, $age, $fields, $options) {
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$data = _field_test_storage_data();
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$load_current = $age == FIELD_LOAD_CURRENT;
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foreach ($fields as $field_id => $ids) {
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$field = field_info_field_by_id($field_id);
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$field_name = $field['field_name'];
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$field_data = $data[$field['id']];
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$sub_table = $load_current ? 'current' : 'revisions';
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$delta_count = array();
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foreach ($field_data[$sub_table] as $row) {
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if ($row->type == $obj_type && (!$row->deleted || $options['deleted'])) {
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if (($load_current && in_array($row->entity_id, $ids)) || (!$load_current && in_array($row->revision_id, $ids))) {
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if (in_array($row->language, field_multilingual_available_languages($obj_type, $field))) {
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if (!isset($delta_count[$row->entity_id][$row->language])) {
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$delta_count[$row->entity_id][$row->language] = 0;
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}
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if ($field['cardinality'] == FIELD_CARDINALITY_UNLIMITED || $delta_count[$row->entity_id][$row->language] < $field['cardinality']) {
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$item = array();
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foreach ($field['columns'] as $column => $attributes) {
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$item[$column] = $row->{$column};
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}
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$objects[$row->entity_id]->{$field_name}[$row->language][] = $item;
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$delta_count[$row->entity_id][$row->language]++;
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}
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}
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}
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}
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}
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}
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}
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/**
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* Implements hook_field_storage_write().
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*/
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function field_test_field_storage_write($obj_type, $object, $op, $fields) {
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$data = _field_test_storage_data();
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list($id, $vid, $bundle) = entity_extract_ids($obj_type, $object);
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foreach ($fields as $field_id) {
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$field = field_info_field_by_id($field_id);
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$field_name = $field['field_name'];
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$field_data = &$data[$field_id];
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$all_languages = field_multilingual_available_languages($obj_type, $field);
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$field_languages = array_intersect($all_languages, array_keys((array) $object->$field_name));
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// Delete and insert, rather than update, in case a value was added.
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if ($op == FIELD_STORAGE_UPDATE) {
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// Delete languages present in the incoming $object->$field_name.
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// Delete all languages if $object->$field_name is empty.
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$languages = !empty($object->$field_name) ? $field_languages : $all_languages;
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if ($languages) {
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foreach ($field_data['current'] as $key => $row) {
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if ($row->type == $obj_type && $row->entity_id == $id && in_array($row->language, $languages)) {
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unset($field_data['current'][$key]);
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}
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}
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if (isset($vid)) {
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foreach ($field_data['revisions'] as $key => $row) {
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if ($row->type == $obj_type && $row->revision_id == $vid) {
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unset($field_data['revisions'][$key]);
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}
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}
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}
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}
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}
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foreach ($field_languages as $langcode) {
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$items = (array) $object->{$field_name}[$langcode];
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$delta_count = 0;
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foreach ($items as $delta => $item) {
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$row = (object) array(
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'field_id' => $field_id,
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'type' => $obj_type,
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'entity_id' => $id,
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'revision_id' => $vid,
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'bundle' => $bundle,
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'delta' => $delta,
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'deleted' => FALSE,
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'language' => $langcode,
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);
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foreach ($field['columns'] as $column => $attributes) {
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$row->{$column} = isset($item[$column]) ? $item[$column] : NULL;
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}
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$field_data['current'][] = $row;
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if (isset($vid)) {
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$field_data['revisions'][] = $row;
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}
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if ($field['cardinality'] != FIELD_CARDINALITY_UNLIMITED && ++$delta_count == $field['cardinality']) {
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break;
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}
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}
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}
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}
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_field_test_storage_data($data);
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}
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/**
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* Implements hook_field_storage_delete().
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*/
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function field_test_field_storage_delete($obj_type, $object, $fields) {
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list($id, $vid, $bundle) = entity_extract_ids($obj_type, $object);
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// Note: reusing field_test_storage_purge(), like field_sql_storage.module
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// does, is highly inefficient in our case...
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foreach (field_info_instances($bundle) as $instance) {
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if (isset($fields[$instance['field_id']])) {
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$field = field_info_field_by_id($instance['field_id']);
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field_test_field_storage_purge($obj_type, $object, $field, $instance);
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}
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}
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}
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/**
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* Implements hook_field_storage_purge().
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*/
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function field_test_field_storage_purge($obj_type, $object, $field, $instance) {
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$data = _field_test_storage_data();
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list($id, $vid, $bundle) = entity_extract_ids($obj_type, $object);
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$field_data = &$data[$field['id']];
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foreach (array('current', 'revisions') as $sub_table) {
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foreach ($field_data[$sub_table] as $key => $row) {
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if ($row->type == $obj_type && $row->entity_id == $id) {
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unset($field_data[$sub_table][$key]);
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}
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}
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}
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_field_test_storage_data($data);
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}
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/**
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* Implements hook_field_storage_delete_revision().
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*/
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function field_test_field_storage_delete_revision($obj_type, $object, $fields) {
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$data = _field_test_storage_data();
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list($id, $vid, $bundle) = entity_extract_ids($obj_type, $object);
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foreach ($fields as $field_id) {
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$field_data = &$data[$field_id];
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foreach (array('current', 'revisions') as $sub_table) {
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foreach ($field_data[$sub_table] as $key => $row) {
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if ($row->type == $obj_type && $row->entity_id == $id && $row->revision_id == $vid) {
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unset($field_data[$sub_table][$key]);
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}
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}
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}
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}
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_field_test_storage_data($data);
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}
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/**
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* Implements hook_field_storage_query().
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*/
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function field_test_field_storage_query($field_id, $conditions, $count, &$cursor = NULL, $age) {
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$data = _field_test_storage_data();
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$load_current = $age == FIELD_LOAD_CURRENT;
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$field = field_info_field_by_id($field_id);
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$field_columns = array_keys($field['columns']);
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$field_data = $data[$field['id']];
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$sub_table = $load_current ? 'current' : 'revisions';
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// We need to sort records by object type and object id.
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usort($field_data[$sub_table], '_field_test_field_storage_query_sort_helper');
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// Initialize results array.
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$return = array();
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$obj_count = 0;
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$rows_count = 0;
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$rows_total = count($field_data[$sub_table]);
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$skip = $cursor;
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$skipped = 0;
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foreach ($field_data[$sub_table] as $row) {
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if ($count != FIELD_QUERY_NO_LIMIT && $obj_count >= $count) {
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break;
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}
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if ($row->field_id == $field['id']) {
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$match = TRUE;
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$condition_deleted = FALSE;
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// Add conditions.
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foreach ($conditions as $condition) {
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@list($column, $value, $operator) = $condition;
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if (empty($operator)) {
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$operator = is_array($value) ? 'IN' : '=';
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}
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switch ($operator) {
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case '=':
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$match = $match && $row->{$column} == $value;
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break;
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case '!=':
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case '<':
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case '<=':
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case '>':
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case '>=':
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eval('$match = $match && '. $row->{$column} . ' ' . $operator . ' '. $value);
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break;
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case 'IN':
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$match = $match && in_array($row->{$column}, $value);
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break;
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case 'NOT IN':
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$match = $match && !in_array($row->{$column}, $value);
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break;
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case 'BETWEEN':
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$match = $match && $row->{$column} >= $value[0] && $row->{$column} <= $value[1];
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break;
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case 'STARTS_WITH':
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case 'ENDS_WITH':
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case 'CONTAINS':
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// Not supported.
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$match = FALSE;
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break;
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}
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// Track condition on 'deleted'.
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if ($column == 'deleted') {
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$condition_deleted = TRUE;
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}
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}
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// Exclude deleted data unless we have a condition on it.
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if (!$condition_deleted && $row->deleted) {
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$match = FALSE;
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}
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if ($match) {
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if (is_null($skip) || $skipped >= $skip) {
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$cursor++;
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// If querying all revisions and the entity type has revisions, we need
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// to key the results by revision_ids.
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$entity_type = entity_get_info($row->type);
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$id = ($load_current || empty($entity_type['object keys']['revision'])) ? $row->entity_id : $row->revision_id;
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if (!isset($return[$row->type][$id])) {
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$return[$row->type][$id] = entity_create_stub_entity($row->type, array($row->entity_id, $row->revision_id, $row->bundle));
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$obj_count++;
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}
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}
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else {
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$skipped++;
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}
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}
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}
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$rows_count++;
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// The query is complete if we walked the whole array.
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if ($count != FIELD_QUERY_NO_LIMIT && $rows_count >= $rows_total) {
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$cursor = FIELD_QUERY_COMPLETE;
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}
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}
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return $return;
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}
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/**
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* Sort helper for field_test_field_storage_query().
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*
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* Sorts by object type and object id.
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*/
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function _field_test_field_storage_query_sort_helper($a, $b) {
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if ($a->type == $b->type) {
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if ($a->entity_id == $b->entity_id) {
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return 0;
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}
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else {
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return $a->entity_id < $b->entity_id ? -1 : 1;
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}
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}
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else {
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return $a->type < $b->type ? -1 : 1;
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}
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}
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/**
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* Implements hook_field_storage_create_field().
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*/
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function field_test_field_storage_create_field($field) {
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if ($field['storage']['type'] == 'field_test_storage_failure') {
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throw new Exception('field_test_storage_failure engine always fails to create fields');
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}
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$data = _field_test_storage_data();
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$data[$field['id']] = array(
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'current' => array(),
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'revisions' => array(),
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);
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_field_test_storage_data($data);
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}
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/**
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* Implements hook_field_storage_delete_field().
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*/
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function field_test_field_storage_delete_field($field) {
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$data = _field_test_storage_data();
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$field_data = &$data[$field['id']];
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foreach (array('current', 'revisions') as $sub_table) {
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foreach ($field_data[$sub_table] as &$row) {
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$row->deleted = TRUE;
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}
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}
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_field_test_storage_data($data);
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}
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/**
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* Implements hook_field_storage_delete_instance().
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*/
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function field_test_field_storage_delete_instance($instance) {
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$data = _field_test_storage_data();
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$field = field_info_field($instance['field_name']);
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$field_data = &$data[$field['id']];
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foreach (array('current', 'revisions') as $sub_table) {
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foreach ($field_data[$sub_table] as &$row) {
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if ($row->bundle == $instance['bundle']) {
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$row->deleted = TRUE;
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}
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}
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}
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_field_test_storage_data($data);
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}
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/**
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* Implements hook_field_attach_create_bundle().
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*/
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function field_test_field_attach_create_bundle($bundle) {
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// We don't need to do anything here.
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}
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/**
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* Implements hook_field_attach_rename_bundle().
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*/
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function field_test_field_attach_rename_bundle($bundle_old, $bundle_new) {
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$data = _field_test_storage_data();
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// We need to account for deleted or inactive fields and instances.
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$instances = field_read_instances(array('bundle' => $bundle_new), array('include_deleted' => TRUE, 'include_inactive' => TRUE));
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foreach ($instances as $field_name => $instance) {
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$field = field_info_field_by_id($instance['field_id']);
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if ($field['storage']['type'] == 'field_test_storage') {
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$field_data = &$data[$field['id']];
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foreach (array('current', 'revisions') as $sub_table) {
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foreach ($field_data[$sub_table] as &$row) {
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if ($row->bundle == $bundle_old) {
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$row->bundle = $bundle_new;
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}
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}
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}
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}
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}
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_field_test_storage_data($data);
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}
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/**
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* Implements hook_field_attach_delete_bundle().
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*/
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function field_test_field_attach_delete_bundle($bundle, $instances) {
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$data = _field_test_storage_data();
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$instances = field_info_instances($bundle);
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foreach ($instances as $field_name => $instance) {
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$field = field_info_field($field_name);
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if ($field['storage']['type'] == 'field_test_storage') {
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$field_data = &$data[$field['id']];
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foreach (array('current', 'revisions') as $sub_table) {
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foreach ($field_data[$sub_table] as &$row) {
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if ($row->bundle == $bundle_old) {
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$row->deleted = TRUE;
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}
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}
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}
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}
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}
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_field_test_storage_data($data);
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}
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