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<?php |
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namespace Mado\QueryBundle\Component\Meta; |
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/** |
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* @since Class available since Release 2.1.0 |
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*/ |
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class JsonPathFinder |
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{ |
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const INDEX_ENTITY_PARENT = 0; |
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const INDEX_FK_RELATION_NAME = 1; |
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const INDEX_ENTITY_FIRST_CHILD = 2; |
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private $map; |
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private $entity; |
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private $entitiesPath = []; |
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private $wrongPath = []; |
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private $mapper; |
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private $appendRootEntityToSubject; |
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private $incrementSubject; |
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public function __construct( |
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DataMapper $mapper |
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) { |
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$this->mapper = $mapper; |
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$this->appendRootEntityToSubject = function($subject, $rootEntity) { |
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$subject[] = $rootEntity; |
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return $subject; |
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}; |
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$this->incrementSubject = function($subject) { |
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return ++$subject; |
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}; |
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} |
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public function setEntity(string $entity) |
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{ |
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$this->entity = $entity; |
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} |
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public function getFirstParentOf(string $innerEntity) |
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{ |
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$this->getMap(); |
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return $this->keep( |
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self::INDEX_ENTITY_PARENT, |
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$innerEntity |
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); |
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} |
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public function getFirstChildOf(string $innerEntity) |
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{ |
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return $this->keep( |
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self::INDEX_ENTITY_FIRST_CHILD, |
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$innerEntity |
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); |
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} |
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public function getSourceRelation(string $innerEntity) |
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{ |
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return $this->keep( |
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self::INDEX_FK_RELATION_NAME, |
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$innerEntity |
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); |
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} |
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public function clearMap(string $innerEntity) |
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{ |
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if (in_array($this->entity, $this->listOfParentsOf($innerEntity))) { |
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foreach ($this->map as $rootEntity => $meta) { |
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if ($this->entity != $rootEntity) { |
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unset($this->map[$rootEntity]); |
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} |
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} |
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} |
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} |
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public function getPathTo(string $innerEntity = '') |
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{ |
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$this->entitiesPath[] = $innerEntity; |
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$path = $this->getSourceRelation($innerEntity); |
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if ($this->numberOfRelationsToEntity($innerEntity) != 1) { |
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$this->clearMap($innerEntity); |
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} |
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if ($this->entity != $this->getFirstParentOf($innerEntity)) { |
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if (!($relation = $this->getFirstParentOf($innerEntity))) { |
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throw new Exceptions\UnreachablePathException(var_export([ |
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'innerEntity' => $innerEntity, |
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'relation' => $relation, |
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], true)); |
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} |
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return $this->getPathTo($relation) . '.' . $path; |
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} |
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return $path; |
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} |
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public function setQueryStartEntity(string $startEntity) |
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{ |
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$this->setEntity($startEntity); |
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} |
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public function getPathToEntity(string $entityToReach) |
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{ |
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foreach ($this->getMap() as $rootEntity => $meta) { |
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if (in_array($rootEntity, $this->wrongPath)) { |
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unset($this->map[$rootEntity]); |
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} |
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} |
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return '_embedded.' . $this->getPathTo($entityToReach); |
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} |
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public function keep($val, $innerEntity) |
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{ |
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foreach ($this->getMap() as $rootEntity => $meta) { |
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foreach ($meta['relations'] as $name => $entity) { |
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if (self::INDEX_ENTITY_FIRST_CHILD == $val) { |
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return $entity; |
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} |
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if ($entity == $innerEntity) { |
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$return = [ |
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self::INDEX_ENTITY_PARENT => $rootEntity, |
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self::INDEX_FK_RELATION_NAME => $name, |
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][$val]; |
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return $return; |
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} |
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} |
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} |
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} |
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public function numberOfRelationsToEntity(string $entityToReach) |
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{ |
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return $this->mapTargetRelations( |
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$this->incrementSubject, |
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$subject = 0, |
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$entityToReach |
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); |
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} |
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public function listOfParentsOf(string $entityToReach) |
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{ |
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return $this->mapTargetRelations( |
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$this->appendRootEntityToSubject, |
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$subject = [], |
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$entityToReach |
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); |
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} |
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public function getEntitiesPath() |
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{ |
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return $this->entitiesPath; |
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} |
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public function removeStep($parentToSkip) |
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{ |
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$this->wrongPath[] = $parentToSkip; |
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} |
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public function getHashKeyForDestination(string $destination) |
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{ |
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return md5($this->entity . $destination); |
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} |
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private function getMap() |
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{ |
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if (!$this->map) { |
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$this->map = $this->mapper->getMap(); |
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} |
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return $this->map; |
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} |
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public function addEntity(array $parents, $rootEntity) : array |
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{ |
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$parents[] = $rootEntity; |
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return $parents; |
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} |
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public function mapTargetRelations( |
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callable $action, |
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$subject, |
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string $entityToReach |
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) { |
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foreach ($this->getMap() as $rootEntity => $meta) { |
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foreach ($meta['relations'] as $name => $relationEntity) { |
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if ($relationEntity == $entityToReach) { |
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$subject = $action($subject, $rootEntity); |
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} |
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} |
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} |
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return $subject; |
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} |
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} |
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