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<?php |
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namespace Enzyme\Collection; |
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use ArrayAccess; |
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use Countable; |
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use Iterator; |
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abstract class BaseCollection implements ArrayAccess, Iterator, Countable |
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{ |
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/** |
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* The list of internal items stored by this collection. |
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* |
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* @var array |
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*/ |
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protected $items; |
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/** |
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* The current iterator position. |
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* |
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* @var int |
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*/ |
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protected $position; |
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/** |
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* Instantiate a new collection with the optional provided array. |
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* |
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* @param array $items |
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*/ |
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public function __construct(array $items = []) |
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{ |
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$this->items = $items; |
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$this->position = 0; |
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} |
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/* |
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| -------------------------------------------------------------------------- |
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| Implementation of `ArrayAccess` interface. |
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| -------------------------------------------------------------------------- |
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*/ |
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public function offsetExists($offset) |
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{ |
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return true === isset($this->items[$offset]); |
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} |
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public function offsetGet($offset) |
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{ |
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return (true === isset($this->items[$offset])) |
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? $this->items[$offset] |
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: null; |
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} |
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public function offsetSet($offset, $value) |
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{ |
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if (true === is_null($offset)) { |
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$this->items[] = $value; |
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} else { |
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$this->items[$offset] = $value; |
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} |
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} |
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public function offsetUnset($offset) |
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{ |
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unset($this->items[$offset]); |
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} |
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/* |
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| -------------------------------------------------------------------------- |
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| Implementation of `Iterator` interface. |
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| -------------------------------------------------------------------------- |
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*/ |
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public function current() |
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{ |
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return $this->items[$this->position]; |
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} |
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public function key() |
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{ |
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return $this->position; |
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} |
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public function next() |
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{ |
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++$this->position; |
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} |
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public function rewind() |
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{ |
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$this->position = 0; |
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} |
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public function valid() |
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{ |
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return true === isset($this->items[$this->position]); |
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} |
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/* |
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| -------------------------------------------------------------------------- |
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| Implementation of `Countable` interface. |
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| -------------------------------------------------------------------------- |
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*/ |
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public function count() |
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{ |
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return count($this->items); |
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} |
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} |
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enzyme /
collection
