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Collection.php
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Collection.php
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<?php
namespace Kozz\Components\Collection;
use ArrayAccess;
use Closure;
use Countable;
use Iterator;
use IteratorAggregate;
use IteratorIterator;
use SplDoublyLinkedList;
use SplQueue;
use Traversable;
use ArrayIterator;
use Kozz\Interfaces\IArrayable;
class Collection implements ArrayAccess, IteratorAggregate, Countable, IArrayable
{
/**
* @var SplDoublyLinkedList | Iterator
*/
protected $container;
/**
* @var SplQueue
*/
protected $modifiers;
/**
* @param Iterator $iterator
*/
public function __construct(Iterator $iterator = null)
{
$this->container = $iterator ? : new SplDoublyLinkedList();
$this->modifiers = new SplQueue();
$this->ensureArrayModifier();
}
/**
* @param Traversable $from
*
* @return Collection
*/
public static function from(\Traversable $from)
{
$self = new self();
foreach ($from as $item)
{
$self->push($item);
}
return $self;
}
public function iteratorToList()
{
$list = new SplDoublyLinkedList();
foreach ($this->container as $item)
{
$list->push($item);
}
$this->container = $list;
unset($list);
}
/**
* @param $value
*/
public function push($value)
{
$this->offsetSet(null, $value);
}
/**
* @param null $offset
* @param $value
*/
public function set($offset = null, $value)
{
$this->offsetSet($offset, $value);
}
/**
* @param $offset
*
* @return mixed
*/
public function get($offset)
{
return $this->offsetGet($offset);
}
/**
* @param $offset
*
* @return void
*/
public function remove($offset)
{
$this->offsetUnset($offset);
}
/**
* @param $offset
*
* @return bool
*/
public function exists($offset)
{
return $this->offsetExists($offset);
}
/**
* @param callable $modifier
*/
public function addModifier(Closure $modifier)
{
$this->modifiers->enqueue($modifier);
}
/**
* @param mixed $offset
*
* @return bool
*/
public function offsetExists($offset)
{
if (!$this->container instanceof ArrayAccess)
{
$this->iteratorToList();
}
return $this->container->offsetExists($offset);
}
/**
* @param mixed $offset
*
* @return mixed
*/
public function offsetGet($offset)
{
if (!$this->container instanceof ArrayAccess)
{
$this->iteratorToList();
}
return $this->container->offsetGet($offset);
}
/**
* @param null $offset
* @param mixed $value
*/
public function offsetSet($offset = null, $value)
{
if (!$this->container instanceof ArrayAccess)
{
$this->iteratorToList();
}
if (null === $offset)
{
$this->container->push($value);
return;
}
$this->container->offsetSet($offset, $value);
}
/**
* @param mixed $offset
*/
public function offsetUnset($offset)
{
if (!$this->container instanceof ArrayAccess)
{
$this->iteratorToList();
}
$this->container->offsetUnset($offset);
}
/**
* @return int
*/
public function count()
{
if (!$this->container instanceof Countable)
{
$this->iteratorToList();
}
return $this->container->count();
}
/**
* @return array
*/
public function toArray()
{
return array_values(iterator_to_array($this->getFilterIterator()));
}
/**
* @return Iterator - An instance of an object implementing Iterator and Traversable
*/
public function getIterator()
{
return $this->container;
}
/**
* @return \CallbackFilterIterator|IteratorIterator
*/
public function getFilterIterator()
{
$it = $this->getIterator();
$modifiers = clone $this->modifiers;
while ($modifiers->count())
{
$it = new \CallbackFilterIterator($it, $this->getFilterCallback($modifiers->dequeue()));
}
unset($modifiers);
return $it;
}
/**
* @param callable $closure
*
* @return callable
*/
public function getFilterCallback(Closure $closure)
{
$filter = function(&$item) use ($closure){
$closure($item);
return true;
};
return $filter;
}
/**
* @param void
*/
private function ensureArrayModifier()
{
$this->addModifier(function(&$item){
$item = ($item instanceof IArrayable) ? $item->toArray() : $item;
});
}
}