metadata.php

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<?php
function row_to_elggmetadata($row) {
    if (!($row instanceof \stdClass)) {
        return $row;
    }

    return new \ElggMetadata($row);
}

function elgg_get_metadata_from_id($id) {
    return _elgg_services()->metadataTable->get($id);
}

function elgg_delete_metadata_by_id($id) {
    return _elgg_services()->metadataTable->delete($id);
}

function create_metadata($entity_guid, $name, $value, $value_type = '', $owner_guid = 0,
        $access_id = ACCESS_PRIVATE, $allow_multiple = false) {

    return _elgg_services()->metadataTable->create($entity_guid, $name, $value,
        $value_type, $owner_guid, $access_id, $allow_multiple);
}

function update_metadata($id, $name, $value, $value_type, $owner_guid, $access_id) {
    return _elgg_services()->metadataTable->update($id, $name, $value,
        $value_type, $owner_guid, $access_id);
}

function create_metadata_from_array($entity_guid, array $name_and_values, $value_type, $owner_guid,
        $access_id = ACCESS_PRIVATE, $allow_multiple = false) {

    return _elgg_services()->metadataTable->createFromArray($entity_guid, $name_and_values,
        $value_type, $owner_guid, $access_id, $allow_multiple);

}

function elgg_get_metadata(array $options = array()) {
    return _elgg_services()->metadataTable->getAll($options);
}

function elgg_delete_metadata(array $options) {
    return _elgg_services()->metadataTable->deleteAll($options);
}

function elgg_disable_metadata(array $options) {
    return _elgg_services()->metadataTable->disableAll($options);
}

function elgg_enable_metadata(array $options) {
    return _elgg_services()->metadataTable->enableAll($options);
}

function elgg_get_entities_from_metadata(array $options = array()) {
    return _elgg_services()->metadataTable->getEntities($options);
}

function elgg_list_entities_from_metadata($options) {
    return elgg_list_entities($options, 'elgg_get_entities_from_metadata');
}

function _elgg_get_entity_metadata_where_sql($e_table, $n_table, $names = null, $values = null,
        $pairs = null, $pair_operator = 'AND', $case_sensitive = true, $order_by_metadata = null,
        $owner_guids = null) {
    return _elgg_services()->metadataTable->getEntityMetadataWhereSql($e_table, $n_table, $names,
        $values, $pairs, $pair_operator, $case_sensitive, $order_by_metadata, $owner_guids);
}

function metadata_array_to_values($array) {
    $valuearray = array();

    if (is_array($array)) {
        foreach ($array as $element) {
            $valuearray[] = $element->value;
        }
    }

    return $valuearray;
}

function get_metadata_url($id) {
    return _elgg_services()->metadataTable->getUrl($id);
}

function register_metadata_as_independent($type, $subtype = '*') {
    _elgg_services()->metadataTable->registerMetadataAsIndependent($type, $subtype);
}

function is_metadata_independent($type, $subtype) {
    return _elgg_services()->metadataTable->isMetadataIndependent($type, $subtype);
}

function metadata_update($event, $object_type, $object) {
    return _elgg_services()->metadataTable->handleUpdate($event, $object_type, $object);
}

function _elgg_invalidate_metadata_cache($action, array $options) {
    _elgg_services()->metadataCache->invalidateByOptions($options);
}

function _elgg_metadata_test($hook, $type, $value, $params) {
    global $CONFIG;
    $value[] = $CONFIG->path . 'engine/tests/ElggCoreMetadataAPITest.php';
    $value[] = $CONFIG->path . 'engine/tests/ElggCoreMetadataCacheTest.php';
    return $value;
}

return function(\Elgg\EventsService $events, \Elgg\HooksRegistrationService $hooks) {
    $events->registerHandler('update', 'all', 'metadata_update');

    $hooks->registerHandler('unit_test', 'system', '_elgg_metadata_test');
};