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<?php |
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namespace TournamentGenerator\Containers; |
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use Closure; |
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use Countable; |
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use Exception; |
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use Iterator; |
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use TournamentGenerator\Helpers\Sorter\BaseSorter; |
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/** |
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* Class BaseContainer |
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* |
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* Container is a helper class for a tree-like structure. It can be used to create a hierarchy and store objects. |
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* |
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* @package TournamentGenerator\Containers |
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* @author Tomáš Vojík <[email protected]> |
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* @since 0.4 |
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*/ |
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class BaseContainer implements Countable, Iterator |
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{ |
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/** @var string|int Identifier */ |
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public $id; |
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/** @var BaseContainer[] Direct child containers */ |
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protected array $children = []; |
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/** @var BaseContainer|null Parent container reference */ |
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protected ?BaseContainer $parent; |
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/** @var array Any value that the container holds */ |
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protected array $values = []; |
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/** @var int Current iterator index */ |
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protected int $currentIndex = 0; |
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/** |
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* Create a new container from array |
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* |
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* @param array $data |
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* |
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* @return BaseContainer |
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* @throws Exception |
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*/ |
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public static function fromArray(array $data) : BaseContainer { |
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$container = new self(0); |
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$container->insertFlat(...$data); |
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return $container; |
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} |
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/** |
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* BaseContainer constructor. |
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* |
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* @param string|int $id |
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*/ |
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public function __construct($id, BaseContainer $parent = null) { |
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$this->id = $id; |
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$this->parent = $parent; |
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} |
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/** |
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* Returns the value count |
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* |
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* @return int |
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*/ |
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public function count() : int { |
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return count($this->get()); |
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} |
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/** |
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* Get all values from the container - including child nodes |
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* |
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* @return array All values |
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*/ |
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public function get() : array { |
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if (count($this->children) > 0) { |
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$values = [$this->values]; |
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foreach ($this->children as $child) { |
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$values[] = $child->get(); |
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} |
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return array_merge(...$values); |
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} |
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return $this->values; |
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} |
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/** |
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* Get all top-level values from the container |
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* |
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* @return array All values |
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*/ |
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public function getTopLevel() : array { |
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return $this->values; |
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} |
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public function getTopLevelQuery() : ContainerQuery { |
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return new ContainerQuery($this, true); |
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} |
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public function getQuery() : ContainerQuery { |
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return new ContainerQuery($this); |
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} |
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/** |
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* Get the current value |
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* |
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* @return mixed |
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*/ |
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public function current() { |
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return $this->get()[$this->currentIndex]; |
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} |
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/** |
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* Move pointer to next |
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*/ |
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public function next() : void { |
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++$this->currentIndex; |
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} |
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/** |
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* Return the current key |
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* |
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* @return int |
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*/ |
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public function key() : int { |
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return $this->currentIndex; |
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} |
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/** |
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* Check if the current value exists |
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* |
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* @return bool |
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*/ |
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public function valid() : bool { |
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return isset($this->get()[$this->currentIndex]); |
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} |
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/** |
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* Rewind the iterator |
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*/ |
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public function rewind() : void { |
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$this->currentIndex = 0; |
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} |
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/** |
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* Insert a value into container |
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* |
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* @param array $values Any value to insert into container |
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* |
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* @post If the value has a container -> add it to the hierarchy |
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* |
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* @return $this |
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* @throws Exception |
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*/ |
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public function insert(...$values) : BaseContainer { |
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foreach ($values as $value) { |
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$this->values[] = $value; |
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if (is_object($value) && method_exists($value, 'getContainer')) { |
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$this->addChild($value->getContainer()); |
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} |
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} |
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return $this; |
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} |
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/** |
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* Insert a value into container |
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* |
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* @param array $values Any value to insert into container |
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* |
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* @return $this |
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* @throws Exception |
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*/ |
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protected function insertFlat(...$values) : BaseContainer { |
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foreach ($values as $value) { |
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$this->values[] = $value; |
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} |
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return $this; |
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} |
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/** |
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* Adds a child container |
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* |
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* @param BaseContainer[] $containers |
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* |
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* @return $this |
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* @post Parent container is set for the added children |
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* @throws Exception |
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*/ |
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public function addChild(BaseContainer ...$containers) : BaseContainer { |
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foreach ($containers as $container) { |
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if (!isset($this->children[$container->id])) { |
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$container->setParent($this); |
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$this->children[$container->id] = $container; |
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} |
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} |
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return $this; |
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} |
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/** |
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* Gets all ids of the leaf containers |
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* @return string[]|int[] |
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*/ |
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public function getLeafIds() : array { |
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if (count($this->children) > 0) { |
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$ids = []; |
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foreach ($this->children as $child) { |
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$ids[] = $child->getLeafIds(); |
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} |
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return array_merge(...$ids); |
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} |
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return [$this->id]; |
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} |
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/** |
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* Add a filter callback |
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* |
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* @param Closure $callback |
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* |
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* @return ContainerQuery |
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*/ |
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public function filter(Closure $callback) : ContainerQuery { |
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$query = new ContainerQuery($this); |
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$query->filter($callback); |
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return $query; |
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} |
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/** |
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* Sort a result using a callback - maintaining the index association |
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* |
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* @param Closure $callback |
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* |
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* @return ContainerQuery |
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*/ |
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public function sort(Closure $callback) : ContainerQuery { |
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$query = new ContainerQuery($this); |
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$query->sort($callback); |
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return $query; |
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} |
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/** |
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* Sort a result set by a given property |
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* |
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* @warning Sort callback has a priority. |
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* |
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* @param string $property |
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* |
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* @return ContainerQuery |
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*/ |
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public function sortBy(string $property) : ContainerQuery { |
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$query = new ContainerQuery($this); |
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$query->sortBy($property); |
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return $query; |
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} |
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/** |
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* @param BaseSorter $sorter |
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* |
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* @return ContainerQuery |
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*/ |
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public function addSorter(BaseSorter $sorter) : ContainerQuery { |
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$query = new ContainerQuery($this); |
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$query->addSorter($sorter); |
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return $query; |
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} |
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/** |
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* Get only unique values |
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* |
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* @return ContainerQuery |
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*/ |
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public function unique() : ContainerQuery { |
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$query = new ContainerQuery($this); |
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$query->unique(); |
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return $query; |
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} |
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/** |
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* Pluck a specific key from all values |
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* |
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* @param string $property Property, array key or method to extract from values |
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* |
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* @return ContainerQuery |
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* @throws Exception |
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*/ |
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public function only(string $property) : ContainerQuery { |
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$query = new ContainerQuery($this); |
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$query->only($property); |
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return $query; |
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} |
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/** |
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* Get only the object's ids |
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* |
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* @return ContainerQuery |
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* @throws Exception |
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*/ |
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public function ids() : ContainerQuery { |
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$query = new ContainerQuery($this); |
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$query->ids(); |
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return $query; |
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} |
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/** |
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* Get a parent container |
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* @return BaseContainer|null |
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* @since 0.5 |
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*/ |
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public function getParent() : ?BaseContainer { |
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return $this->parent; |
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} |
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/** |
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* Set a container's parent |
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* |
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* @param BaseContainer|null $parent |
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* |
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* @return BaseContainer |
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* @throws Exception |
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* @since 0.5 |
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*/ |
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public function setParent(BaseContainer $parent) : BaseContainer { |
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if ($parent !== $this->parent && !is_null($this->parent)) { |
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throw new Exception('Parent container can only be set once!'); |
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} |
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$this->parent = $parent; |
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return $this; |
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} |
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} |