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<?php |
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namespace Elgg\Database; |
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use Elgg\Cache\MetadataCache; |
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use Elgg\Database; |
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use Elgg\Database\Clauses\MetadataWhereClause; |
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use Elgg\EventsService as Events; |
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use Elgg\TimeUsing; |
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use ElggMetadata; |
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use ElggEntity; |
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/** |
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* This class interfaces with the database to perform CRUD operations on metadata |
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* |
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* WARNING: API IN FLUX. DO NOT USE DIRECTLY. |
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* |
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* @access private |
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*/ |
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class MetadataTable { |
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use TimeUsing; |
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/** |
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* @var MetadataCache |
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*/ |
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protected $metadata_cache; |
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/** |
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* @var Database |
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*/ |
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protected $db; |
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/** |
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* @var Events |
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*/ |
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protected $events; |
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/** |
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* @var string[] |
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*/ |
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protected $tag_names = []; |
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const MYSQL_TEXT_BYTE_LIMIT = 65535; |
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/** |
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* Constructor |
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* |
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* @param MetadataCache $metadata_cache A cache for this table |
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* @param Database $db The Elgg database |
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* @param Events $events The events registry |
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*/ |
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public function __construct( |
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MetadataCache $metadata_cache, |
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Database $db, |
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Events $events |
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) { |
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$this->metadata_cache = $metadata_cache; |
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$this->db = $db; |
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$this->events = $events; |
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} |
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/** |
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* Registers a metadata name as containing tags for an entity. |
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* |
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* @param string $name Tag name |
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* |
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* @return bool |
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*/ |
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public function registerTagName($name) { |
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if (!in_array($name, $this->tag_names)) { |
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$this->tag_names[] = $name; |
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} |
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return true; |
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} |
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/** |
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* Unregisters a metadata tag name |
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* |
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* @param string $name Tag name |
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* |
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* @return bool |
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*/ |
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public function unregisterTagName($name) { |
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$index = array_search($name, $this->tag_names); |
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if ($index >= 0) { |
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unset($this->tag_names[$index]); |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Returns an array of valid metadata names for tags. |
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* |
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* @return string[] |
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*/ |
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public function getTagNames() { |
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return $this->tag_names; |
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} |
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/** |
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* Get a specific metadata object by its id |
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* |
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* @see MetadataTable::getAll() |
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* |
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* @param int $id The id of the metadata object being retrieved. |
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* |
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* @return ElggMetadata|false false if not found |
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*/ |
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public function get($id) { |
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$qb = Select::fromTable('metadata'); |
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$qb->select('*'); |
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$where = new MetadataWhereClause(); |
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$where->ids = $id; |
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$qb->addClause($where); |
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$row = $this->db->getDataRow($qb); |
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if ($row) { |
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return new ElggMetadata($row); |
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} |
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return false; |
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} |
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/** |
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* Deletes metadata using its ID |
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* |
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* @param ElggMetadata $metadata Metadata |
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* |
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* @return bool |
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*/ |
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public function delete(ElggMetadata $metadata) { |
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if (!$metadata->id || !$metadata->canEdit()) { |
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return false; |
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} |
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if (!elgg_trigger_event('delete', 'metadata', $metadata)) { |
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return false; |
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} |
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$qb = Delete::fromTable('metadata'); |
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$qb->where($qb->compare('id', '=', $metadata->id, ELGG_VALUE_INTEGER)); |
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$deleted = $this->db->deleteData($qb); |
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if ($deleted) { |
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$this->metadata_cache->clear($metadata->entity_guid); |
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} |
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return $deleted; |
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} |
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/** |
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* Create a new metadata object, or update an existing one (if multiple is allowed) |
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* |
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* Metadata can be an array by setting allow_multiple to true, but it is an |
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* indexed array with no control over the indexing |
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* |
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* @param ElggMetadata $metadata Metadata |
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* @param bool $allow_multiple Allow multiple values for one key. Default is false |
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* |
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* @return int|false id of metadata or false if failure |
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*/ |
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public function create(ElggMetadata $metadata, $allow_multiple = false) { |
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if (!isset($metadata->value) || !isset($metadata->entity_guid)) { |
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elgg_log("Metadata must have a value and entity guid", 'ERROR'); |
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return false; |
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} |
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if (!is_scalar($metadata->value)) { |
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elgg_log("To set multiple metadata values use ElggEntity::setMetadata", 'ERROR'); |
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return false; |
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} |
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if ($metadata->id) { |
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if ($this->update($metadata)) { |
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return $metadata->id; |
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} |
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} |
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if (strlen($metadata->value) > self::MYSQL_TEXT_BYTE_LIMIT) { |
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elgg_log("Metadata '$metadata->name' is above the MySQL TEXT size limit and may be truncated.", 'WARNING'); |
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} |
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if (!$allow_multiple) { |
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$id = $this->getIdsByName($metadata->entity_guid, $metadata->name); |
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if (is_array($id)) { |
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throw new \LogicException("Multiple '{$metadata->name}' metadata values exist for entity [guid: {$metadata->entity_guid}]. Use ElggEntity::setMetadata()"); |
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} |
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if ($id) { |
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$metadata->id = $id; |
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if ($this->update($metadata)) { |
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return $metadata->id; |
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} |
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} |
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} |
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if (!$this->events->triggerBefore('create', 'metadata', $metadata)) { |
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return false; |
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} |
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$time_created = $this->getCurrentTime()->getTimestamp(); |
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$qb = Insert::intoTable('metadata'); |
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$qb->values([ |
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'name' => $qb->param($metadata->name, ELGG_VALUE_STRING), |
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'entity_guid' => $qb->param($metadata->entity_guid, ELGG_VALUE_INTEGER), |
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'value' => $qb->param($metadata->value, $metadata->value_type === 'integer' ? ELGG_VALUE_INTEGER : ELGG_VALUE_STRING), |
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'value_type' => $qb->param($metadata->value_type, ELGG_VALUE_STRING), |
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'time_created' => $qb->param($time_created, ELGG_VALUE_INTEGER), |
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]); |
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$id = $this->db->insertData($qb); |
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if ($id === false) { |
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return false; |
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} |
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$metadata->id = (int) $id; |
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$metadata->time_created = $time_created; |
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if ($this->events->trigger('create', 'metadata', $metadata)) { |
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$this->metadata_cache->clear($metadata->entity_guid); |
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$this->events->triggerAfter('create', 'metadata', $metadata); |
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return $id; |
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} else { |
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$this->delete($metadata); |
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return false; |
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} |
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} |
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/** |
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* Update a specific piece of metadata |
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* |
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* @param ElggMetadata $metadata Updated metadata |
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* |
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* @return bool |
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*/ |
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public function update(ElggMetadata $metadata) { |
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if (!$metadata->canEdit()) { |
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return false; |
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} |
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if (!$this->events->triggerBefore('update', 'metadata', $metadata)) { |
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return false; |
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} |
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if (strlen($metadata->value) > self::MYSQL_TEXT_BYTE_LIMIT) { |
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elgg_log("Metadata '$metadata->name' is above the MySQL TEXT size limit and may be truncated.", 'WARNING'); |
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} |
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$qb = Update::table('metadata'); |
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$qb->set('name', $qb->param($metadata->name, ELGG_VALUE_STRING)) |
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->set('value', $qb->param($metadata->value, $metadata->value_type === 'integer' ? ELGG_VALUE_INTEGER : ELGG_VALUE_STRING)) |
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->set('value_type', $qb->param($metadata->value_type, ELGG_VALUE_STRING)) |
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->where($qb->compare('id', '=', $metadata->id, ELGG_VALUE_INTEGER)); |
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$result = $this->db->updateData($qb); |
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198 |
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if ($result === false) { |
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return false; |
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} |
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198 |
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$this->metadata_cache->clear($metadata->entity_guid); |
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198 |
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$this->events->trigger('update', 'metadata', $metadata); |
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198 |
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$this->events->triggerAfter('update', 'metadata', $metadata); |
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return true; |
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} |
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/** |
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* Returns metadata |
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* |
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* Accepts all {@link elgg_get_entities()} options for entity restraints. |
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* |
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* @see elgg_get_entities() |
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* |
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* @param array $options Options |
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* |
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* @return ElggMetadata[]|mixed |
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*/ |
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public function getAll(array $options = []) { |
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$options['metastring_type'] = 'metadata'; |
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$options = _elgg_normalize_metastrings_options($options); |
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return Metadata::find($options); |
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} |
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302
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/** |
303
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* Deletes metadata based on $options. |
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* |
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* @warning Unlike elgg_get_metadata() this will not accept an empty options array! |
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* This requires at least one constraint: |
307
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* metadata_name(s), metadata_value(s), or guid(s) must be set. |
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* |
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* @see elgg_get_metadata() |
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* @see elgg_get_entities() |
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* |
312
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* @param array $options Options |
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* |
314
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* @return bool|null true on success, false on failure, null if no metadata to delete. |
315
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*/ |
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271 |
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public function deleteAll(array $options) { |
317
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271 |
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if (!_elgg_is_valid_options_for_batch_operation($options, 'metadata')) { |
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return false; |
319
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} |
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321
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// This moved last in case an object's constructor sets metadata. Currently the batch |
322
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// delete process has to create the entity to delete its metadata. See #5214 |
323
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271 |
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$this->metadata_cache->invalidateByOptions($options); |
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325
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271 |
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$options['batch'] = true; |
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$options['batch_size'] = 50; |
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271 |
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$options['batch_inc_offset'] = false; |
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329
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271 |
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$metadata = Metadata::find($options); |
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$count = $metadata->count(); |
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332
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271 |
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if (!$count) { |
333
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91 |
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return; |
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} |
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336
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199 |
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$success = 0; |
337
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199 |
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foreach ($metadata as $md) { |
338
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199 |
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if ($md->delete()) { |
339
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199 |
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$success++; |
340
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} |
341
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} |
342
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343
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199 |
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return $success == $count; |
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} |
345
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346
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/** |
347
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* Returns ID(s) of metadata with a particular name attached to an entity |
348
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* |
349
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* @param int $entity_guid Entity guid |
350
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* @param string $name Metadata name |
351
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* |
352
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* @return int[]|int|null |
353
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*/ |
354
|
1027 |
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public function getIdsByName($entity_guid, $name) { |
355
|
1027 |
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if ($this->metadata_cache->isLoaded($entity_guid)) { |
356
|
666 |
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$ids = $this->metadata_cache->getSingleId($entity_guid, $name); |
357
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} else { |
358
|
1027 |
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$qb = Select::fromTable('metadata'); |
359
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1027 |
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$qb->select('id') |
360
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1027 |
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->where($qb->compare('entity_guid', '=', $entity_guid, ELGG_VALUE_INTEGER)) |
361
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1027 |
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->andWhere($qb->compare('name', '=', $name, ELGG_VALUE_STRING)); |
362
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363
|
1027 |
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$callback = function (\stdClass $row) { |
364
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1 |
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return (int) $row->id; |
365
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1027 |
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}; |
366
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367
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$ids = $this->db->getData($qb, $callback); |
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} |
369
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370
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if (empty($ids)) { |
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return null; |
372
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|
} |
373
|
|
|
|
374
|
|
|
if (is_array($ids) && count($ids) === 1) { |
375
|
|
|
return array_shift($ids); |
376
|
|
|
} |
377
|
|
|
|
378
|
|
|
return $ids; |
379
|
|
|
} |
380
|
|
|
} |
381
|
|
|
|
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..