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<?php |
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namespace kartavik\Collections; |
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use kartavik\Collections\Exceptions\InvalidElementException; |
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/** |
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* Class Collection |
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* @package kartavik\Collections |
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*/ |
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class Collection extends \ArrayObject implements \JsonSerializable |
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{ |
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/** @var string */ |
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protected $type = null; |
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protected function __construct( |
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array $elements = [], |
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string $type = null, |
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int $flags = 0, |
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string $iteratorClass = \ArrayIterator::class |
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) { |
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$this->type = $type; |
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foreach ($elements as $element) { |
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$this->instanceOfType($element); |
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} |
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parent::__construct($elements, $flags, $iteratorClass); |
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} |
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public function type(): string |
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{ |
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return $this->type; |
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} |
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/** |
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* @param mixed $value |
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* |
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* @throws InvalidElementException |
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*/ |
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public function append($value): void |
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{ |
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$this->instanceOfType($value); |
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parent::append($value); |
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} |
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/** |
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* @param mixed $index |
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* @param mixed $value |
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* |
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* @throws InvalidElementException |
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*/ |
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public function offsetSet($index, $value): void |
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{ |
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$this->instanceOfType($value); |
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parent::offsetSet($index, $value); |
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} |
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public function jsonSerialize(): array |
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{ |
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return (array)$this; |
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} |
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/** |
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* @param $object |
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* |
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* @throws InvalidElementException |
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*/ |
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public function instanceOfType($object): void |
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{ |
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$type = $this->type(); |
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if (!$object instanceof $type) { |
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throw new InvalidElementException($object, $type); |
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} |
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} |
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public function map(callable $function, Collection ...$arrays): Collection |
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{ |
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$mappedType = get_class(call_user_func( |
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$function, |
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$this->offsetGet(0) |
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)); |
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return Collection::{$mappedType}(array_map( |
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$function, |
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$this->jsonSerialize(), |
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$arrays |
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)); |
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} |
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public function chunk(int $size): Collection |
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{ |
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$mappedType = get_class($this->offsetGet(0)); |
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/** @var Collection $collection */ |
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$collection = Collection::{Collection::class}(); |
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$chunked = array_chunk($this->jsonSerialize(), $size); |
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foreach ($chunked as $index => $chunk) { |
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$collection->append(Collection::{$mappedType}()); |
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foreach ($chunk as $item) { |
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$collection[$index]->append($item); |
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} |
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} |
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return $collection; |
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} |
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public function column(string $property, callable $function = null): Collection |
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{ |
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$getterType = get_class($this->offsetGet(0)->{$property}()); |
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if (!is_null($function)) { |
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/** @var Collection $collection */ |
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$collection = Collection::{$getterType}(); |
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foreach ($this->jsonSerialize() as $item) { |
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$collection->append(call_user_func($function, $item->{$property}())); |
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} |
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return $collection; |
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} else { |
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return Collection::{$getterType}(array_map( |
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function ($item) use ($property) { |
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return $item->{$property}(); |
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}, |
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$this->jsonSerialize() |
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)); |
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} |
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} |
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public function pop(): object |
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{ |
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$last = $this->count() - 1; |
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$element = $this->offsetGet($last); |
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$this->offsetUnset($last); |
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return $element; |
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} |
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public function sum(callable $function) |
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{ |
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$sum = 0; |
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foreach ($this as $element) { |
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$sum += call_user_func($function, $element); |
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} |
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return $sum; |
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} |
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/** |
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* @param string $name |
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* @param array $arguments |
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* |
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* @return Collection |
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*/ |
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public static function __callStatic(string $name, array $arguments) |
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{ |
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if (!empty($arguments) && is_array($arguments[0])) { |
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$arguments = $arguments[0]; |
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} |
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if (!class_exists($name)) { |
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throw new \BadMethodCallException("Class with name {$name} does not exist!"); |
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} |
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return new static($arguments, $name); |
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} |
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} |
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KartaviK /
typed-collection
