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