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<?php |
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/** |
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* components |
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* |
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* @author Wolfy-J |
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*/ |
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namespace Spiral\ORM\Entities\Relations; |
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use Spiral\Database\Builders\SelectQuery; |
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use Spiral\Database\Entities\Table; |
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use Spiral\ORM\CommandInterface; |
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use Spiral\ORM\Commands\ContextualDeleteCommand; |
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use Spiral\ORM\Commands\InsertCommand; |
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use Spiral\ORM\Commands\TransactionalCommand; |
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use Spiral\ORM\Commands\UpdateCommand; |
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use Spiral\ORM\ContextualCommandInterface; |
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use Spiral\ORM\Entities\Loaders\ManyToManyLoader; |
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use Spiral\ORM\Entities\Loaders\RelationLoader; |
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use Spiral\ORM\Entities\Nodes\PivotedRootNode; |
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use Spiral\ORM\Entities\RecordIterator; |
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use Spiral\ORM\Entities\Relations\Traits\LookupTrait; |
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use Spiral\ORM\Exceptions\RelationException; |
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use Spiral\ORM\Helpers\WhereDecorator; |
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use Spiral\ORM\ORMInterface; |
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use Spiral\ORM\Record; |
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use Spiral\ORM\RecordInterface; |
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/** |
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* Provides ability to create pivot map between parent record and multiple objects with ability to |
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* link them, link and create, update pivot, unlink or sync send. Relation support partial mode. |
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*/ |
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class ManyToManyRelation extends MultipleRelation implements \IteratorAggregate, \Countable |
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{ |
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use LookupTrait; |
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/** Schema shortcuts */ |
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const PIVOT_TABLE = Record::PIVOT_TABLE; |
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const PIVOT_DATABASE = 917; |
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/** |
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* @var Table|null |
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*/ |
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private $pivotTable = null; |
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/** |
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* @var \SplObjectStorage |
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*/ |
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private $pivotData; |
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/** |
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* Linked but not saved yet records. |
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* |
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* @var array |
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*/ |
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private $scheduled = []; |
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/** |
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* Record which pivot data was updated, record must still present in linked array. |
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* |
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* @var array |
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*/ |
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private $updated = []; |
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/** |
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* Records scheduled to be de-associated. |
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* |
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* @var RecordInterface[] |
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*/ |
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private $unlinked = []; |
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/** |
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* @param string $class |
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* @param array $schema |
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* @param ORMInterface $orm |
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*/ |
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public function __construct($class, array $schema, ORMInterface $orm) |
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{ |
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parent::__construct($class, $schema, $orm); |
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$this->pivotData = new \SplObjectStorage(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function setRelated($value) |
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{ |
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$this->loadData(true); |
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if (is_null($value)) { |
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$value = []; |
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} |
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if (!is_array($value)) { |
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throw new RelationException("HasMany relation can only be set with array of entities"); |
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} |
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//todo: write this section!! |
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} |
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/** |
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* Get all unlinked records. |
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* |
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* @return \ArrayIterator |
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*/ |
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public function getUnlinked() |
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{ |
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return new \ArrayIterator($this->unlinked); |
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} |
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/** |
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* Get pivot data associated with specific instance. |
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* |
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* @param RecordInterface $record |
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* |
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* @return array |
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* |
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* @throws RelationException |
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*/ |
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public function getPivot(RecordInterface $record): array |
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{ |
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if (empty($matched = $this->matchOne($record))) { |
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throw new RelationException( |
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"Unable to get pivotData for non linked record" . ($this->autoload ? '' : " (partial on)") |
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); |
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} |
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return $this->pivotData->offsetGet($matched); |
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} |
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/** |
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* Link record with parent entity. Only record instances is accepted. |
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* |
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* @param RecordInterface $record |
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* @param array $pivotData |
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* |
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* @return self |
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* |
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* @throws RelationException |
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*/ |
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public function link(RecordInterface $record, array $pivotData = []): self |
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{ |
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$this->loadData(true); |
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$this->assertValid($record); |
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if (in_array($record, $this->instances)) { |
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$this->assertPivot($pivotData); |
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//Merging pivot data |
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$this->pivotData->offsetSet($record, $pivotData + $this->getPivot($record)); |
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if (!in_array($record, $this->updated)) { |
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//Indicating that record pivot data has been changed |
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$this->updated[] = $record; |
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} |
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return $this; |
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} |
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//New association |
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$this->instances[] = $record; |
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$this->scheduled[] = $record; |
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$this->pivotData->offsetSet($record, $pivotData); |
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return $this; |
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} |
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/** |
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* Unlink specific entity from relation. Will load relation data! Record to delete will be |
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* automatically matched to a give record. |
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* |
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* @param RecordInterface $record |
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* |
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* @return self |
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* |
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* @throws RelationException When entity not linked. |
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*/ |
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public function unlink(RecordInterface $record): self |
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{ |
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$this->loadData(true); |
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foreach ($this->instances as $index => $linked) { |
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if ($this->match($linked, $record)) { |
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//Removing locally |
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unset($this->instances[$index]); |
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if (!in_array($linked, $this->scheduled) || !$this->autoload) { |
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//Scheduling unlink in db when we know relation OR partial mode is on |
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$this->unlinked[] = $linked; |
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} |
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break; |
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} |
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} |
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$this->instances = array_values($this->instances); |
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return $this; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function queueCommands(ContextualCommandInterface $parentCommand): CommandInterface |
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{ |
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$transaction = new TransactionalCommand(); |
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foreach ($this->unlinked as $record) { |
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//Leading command |
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$transaction->addCommand($recordCommand = $record->queueStore(), true); |
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//Delete link |
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$command = new ContextualDeleteCommand($this->pivotTable(), [ |
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$this->key(Record::THOUGHT_INNER_KEY) => null, |
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$this->key(Record::THOUGHT_OUTER_KEY) => null, |
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]); |
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//Make sure command is properly configured with conditions OR create promises |
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$command = $this->ensureContext( |
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$command, |
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$this->parent, |
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$parentCommand, |
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$record, |
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$recordCommand |
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); |
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$transaction->addCommand($command); |
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} |
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foreach ($this->instances as $record) { |
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//Leading command |
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$transaction->addCommand($recordCommand = $record->queueStore(), true); |
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//Create or refresh link between records |
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if (in_array($record, $this->scheduled)) { |
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//Create link |
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$command = new InsertCommand( |
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$this->pivotTable(), |
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$this->pivotData->offsetGet($record) |
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); |
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} elseif (in_array($record, $this->updated)) { |
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//Update link |
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$command = new UpdateCommand( |
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$this->pivotTable(), |
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[ |
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$this->key(Record::THOUGHT_INNER_KEY) => null, |
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$this->key(Record::THOUGHT_OUTER_KEY) => null, |
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], |
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$this->pivotData->offsetGet($record) |
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); |
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} else { |
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//Nothing to do |
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continue; |
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} |
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//Syncing pivot data values |
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$command->onComplete(function (ContextualCommandInterface $command) use ($record) { |
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//Now when we are done we can sync our values with current data |
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$this->pivotData->offsetSet($record, $command->getContext()); |
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}); |
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//Make sure command is properly configured with conditions OR create promises |
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$command = $this->ensureContext( |
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$command, |
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$this->parent, |
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$parentCommand, |
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$record, |
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$recordCommand |
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); |
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$transaction->addCommand($command); |
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} |
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$this->scheduled = []; |
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$this->unlinked = []; |
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$this->updated = []; |
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return $transaction; |
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} |
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/** |
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* Fetch data from database. Lazy load. Method require a bit of love. |
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* |
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* @return array |
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*/ |
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protected function loadRelated(): array |
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{ |
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$innerKey = $this->parent->getField($this->key(Record::INNER_KEY)); |
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if (empty($innerKey)) { |
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return []; |
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} |
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//Work with pre-build query |
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$query = $this->createQuery($innerKey); |
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//Use custom node to parse data |
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$node = new PivotedRootNode( |
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$this->schema[Record::RELATION_COLUMNS], |
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$this->schema[Record::PIVOT_COLUMNS], |
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$this->schema[Record::OUTER_KEY], |
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$this->schema[Record::THOUGHT_INNER_KEY], |
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$this->schema[Record::THOUGHT_OUTER_KEY] |
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); |
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$iterator = $query->getIterator(); |
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foreach ($query->getIterator() as $row) { |
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//Time to parse some data |
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$node->parseRow(0, $row); |
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} |
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//Memory free |
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$iterator->close(); |
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return $node->getResult(); |
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} |
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/** |
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* Create query for lazy loading. |
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* |
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* @param mixed $innerKey |
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* |
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* @return SelectQuery |
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*/ |
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protected function createQuery($innerKey): SelectQuery |
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{ |
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$table = $this->orm->table($this->class); |
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$query = $this->orm->table($this->class)->select(); |
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//Loader will take care of query configuration |
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$loader = new ManyToManyLoader($this->class, $table->getName(), $this->schema, $this->orm); |
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//This is root loader, we can do self-alias (THIS IS SAFE due loader in POSTLOAD mode) |
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$loader = $loader->withContext( |
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$loader, |
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[ |
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'alias' => $table->getName(), |
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'pivotAlias' => $table->getName() . '_pivot', |
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'method' => RelationLoader::POSTLOAD |
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] |
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); |
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//Configuring query using parent inner key value as reference |
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/** @var ManyToManyLoader $loader */ |
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$query = $loader->configureQuery($query, [$innerKey]); |
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344
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//Additional pivot conditions |
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$pivotDecorator = new WhereDecorator($query, 'onWhere', $table->getName() . '_pivot'); |
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$pivotDecorator->where($this->schema[Record::WHERE_PIVOT]); |
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//Additional where conditions! |
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$decorator = new WhereDecorator($query, 'where', 'root'); |
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$decorator->where($this->schema[Record::WHERE]); |
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return $query; |
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} |
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/** |
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* Init relations and populate pivot map. |
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* |
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* @return ManyToManyRelation |
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*/ |
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protected function initInstances(): MultipleRelation |
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{ |
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if (is_array($this->data) && !empty($this->data)) { |
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//Iterates and instantiate records |
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$iterator = new RecordIterator($this->data, $this->class, $this->orm); |
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foreach ($iterator as $pivotData => $item) { |
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if (in_array($item, $this->instances)) { |
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//Skip duplicates (if any?) |
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continue; |
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} |
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$this->pivotData->attach($item, $pivotData); |
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$this->instances[] = $item; |
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} |
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} |
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//Memory free |
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$this->data = []; |
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return $this; |
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} |
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383
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/** |
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* Indicates that records are not linked yet. |
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* |
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* @param RecordInterface $outer |
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* |
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* @return bool |
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|
|
*/ |
390
|
|
|
protected function isLinked(RecordInterface $outer) |
391
|
|
|
{ |
392
|
|
|
$pivotData = $this->pivotData->offsetGet($outer); |
393
|
|
|
if (empty($pivotData)) { |
394
|
|
|
//No pivot data at all |
395
|
|
|
return false; |
396
|
|
|
} |
397
|
|
|
|
398
|
|
|
if (empty($pivotData[$this->key(Record::THOUGHT_OUTER_KEY)])) { |
399
|
|
|
//No outer key value |
400
|
|
|
return false; |
401
|
|
|
} |
402
|
|
|
|
403
|
|
|
if (empty($pivotData[$this->key(Record::THOUGHT_INNER_KEY)])) { |
404
|
|
|
//No inner key value |
405
|
|
|
return false; |
406
|
|
|
} |
407
|
|
|
|
408
|
|
|
//Both keys are set |
409
|
|
|
return true; |
410
|
|
|
} |
411
|
|
|
|
412
|
|
|
/** |
413
|
|
|
* Insane method used to properly set pivot command context (where or insert statement) based on |
414
|
|
|
* parent and outer records AND/OR based on command promises. |
415
|
|
|
* |
416
|
|
|
* @param ContextualCommandInterface $pivotCommand |
417
|
|
|
* @param RecordInterface $parent |
418
|
|
|
* @param ContextualCommandInterface $parentCommand |
419
|
|
|
* @param RecordInterface $outer |
420
|
|
|
* @param ContextualCommandInterface $outerCommand |
421
|
|
|
* |
422
|
|
|
* @return ContextualCommandInterface |
423
|
|
|
*/ |
424
|
|
|
protected function ensureContext( |
425
|
|
|
ContextualCommandInterface $pivotCommand, |
426
|
|
|
RecordInterface $parent, |
427
|
|
|
ContextualCommandInterface $parentCommand, |
428
|
|
|
RecordInterface $outer, |
429
|
|
|
ContextualCommandInterface $outerCommand |
430
|
|
|
) { |
431
|
|
|
//Parent record dependency |
432
|
|
|
$parentCommand->onExecute(function ($parentCommand) use ($pivotCommand, $parent) { |
433
|
|
|
$pivotCommand->addContext( |
434
|
|
|
$this->key(Record::THOUGHT_INNER_KEY), |
435
|
|
|
$this->lookupKey(Record::INNER_KEY, $parent, $parentCommand) |
436
|
|
|
); |
437
|
|
|
}); |
438
|
|
|
|
439
|
|
|
//Outer record dependency |
440
|
|
|
$outerCommand->onExecute(function ($outerCommand) use ($pivotCommand, $outer) { |
441
|
|
|
$pivotCommand->addContext( |
442
|
|
|
$this->key(Record::THOUGHT_OUTER_KEY), |
443
|
|
|
$this->lookupKey(Record::OUTER_KEY, $outer, $outerCommand) |
444
|
|
|
); |
445
|
|
|
}); |
446
|
|
|
|
447
|
|
|
return $pivotCommand; |
448
|
|
|
} |
449
|
|
|
|
450
|
|
|
/** |
451
|
|
|
* @return Table |
452
|
|
|
*/ |
453
|
|
|
protected function pivotTable() |
454
|
|
|
{ |
455
|
|
|
if (empty($this->pivotTable)) { |
456
|
|
|
$this->pivotTable = $this->orm->database( |
457
|
|
|
$this->schema[self::PIVOT_DATABASE] |
458
|
|
|
)->table( |
459
|
|
|
$this->schema[self::PIVOT_TABLE] |
460
|
|
|
); |
461
|
|
|
} |
462
|
|
|
|
463
|
|
|
return $this->pivotTable; |
464
|
|
|
} |
465
|
|
|
|
466
|
|
|
/** |
467
|
|
|
* Make sure that pivot data in a valid format. |
468
|
|
|
* |
469
|
|
|
* @param array $pivotData |
470
|
|
|
* |
471
|
|
|
* @throws RelationException |
472
|
|
|
*/ |
473
|
|
|
private function assertPivot(array $pivotData) |
474
|
|
|
{ |
475
|
|
|
if ($diff = array_diff(array_keys($pivotData), $this->schema[Record::PIVOT_COLUMNS])) { |
476
|
|
|
throw new RelationException( |
477
|
|
|
"Invalid pivot data, undefined columns found: " . join(', ', $diff) |
478
|
|
|
); |
479
|
|
|
} |
480
|
|
|
} |
481
|
|
|
} |