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<?php |
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namespace Atrapalo\PHPTools\Collection; |
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/** |
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* Class EntityCollection |
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* @package Atrapalo\PHPTools\Collection |
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* |
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* @author Guillermo González <[email protected]> |
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*/ |
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abstract class EntityCollection implements \Countable, \Iterator |
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{ |
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/** @var array */ |
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private $entities = array(); |
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/** @var bool */ |
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protected $allowEntitiesChildren; |
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/** |
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* @return string |
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*/ |
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abstract public static function entityClass(): string; |
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/** |
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* Collection constructor. |
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* @param array $entities |
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* @param bool $allowEntitiesChildren |
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* @throws \Exception |
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*/ |
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public function __construct(array $entities, bool $allowEntitiesChildren = false) |
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{ |
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if (empty($entities)) { |
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throw static::customEmptyException(); |
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} |
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$this->allowEntitiesChildren = $allowEntitiesChildren; |
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foreach ($entities as $entity) { |
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$this->add($entity); |
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} |
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} |
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/** |
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* @param $entity |
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* @throws \Exception |
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*/ |
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public function add($entity) |
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{ |
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if (!$this->isValid($entity)) { |
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throw static::customInvalidEntityException(); |
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} |
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$this->entities[] = $entity; |
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} |
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/** |
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* @param $key |
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* @param $entity |
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* @throws \Exception |
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*/ |
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protected function set($key, $entity) |
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{ |
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if (!$this->isValid($entity)) { |
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throw static::customInvalidEntityException(); |
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} |
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$this->entities[$key] = $entity; |
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} |
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/** |
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* @param $entity |
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* @return bool |
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*/ |
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public function isValid($entity): bool |
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{ |
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if (!is_object($entity)) return false; |
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$entityClass = $this->allowEntitiesChildren ? get_parent_class($entity) : get_class($entity); |
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if ($entityClass === static::entityClass()){ |
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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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* @return array |
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*/ |
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public function keys(): array |
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{ |
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return array_keys($this->entities); |
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} |
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/** |
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* @return array |
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*/ |
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public function values(): array |
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{ |
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return array_values($this->entities); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function first() |
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{ |
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return reset($this->entities); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function last() |
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{ |
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return end($this->entities); |
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} |
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/** |
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* @return array |
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*/ |
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public function toArray(): array |
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{ |
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return $this->entities; |
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} |
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/** |
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* @param int $offset |
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* @param null $length |
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* @return static |
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* @throws \Exception |
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*/ |
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public function slice(int $offset, $length = null) |
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{ |
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$entities = array_slice($this->entities, $offset, $length, true); |
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if (empty($entities)) { |
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throw static::customEmptyException(); |
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} |
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return new static($entities); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function current() |
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{ |
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return current($this->entities); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function next() |
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{ |
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return next($this->entities); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function key() |
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{ |
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return key($this->entities); |
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} |
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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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{ |
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return key($this->entities) !== null; |
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} |
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public function rewind() |
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{ |
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reset($this->entities); |
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} |
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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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{ |
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return count($this->entities); |
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} |
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/** |
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* @return \Exception |
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*/ |
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7 |
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public static function customEmptyException(): \Exception |
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{ |
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return new \LengthException('Collection can not be empty'); |
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} |
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/** |
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* @return \Exception |
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*/ |
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3 |
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public static function customInvalidEntityException(): \Exception |
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{ |
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return new \UnexpectedValueException('Element is not valid instance of '.static::entityClass()); |
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} |
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} |
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atrapalo /
php-tools
