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<?php
/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Composer\DependencyResolver;
/**
* @author Nils Adermann <naderman@naderman.de>
*/
class RuleSetIterator implements \Iterator
{
protected $rules;
protected $types;
protected $currentOffset;
protected $currentType;
protected $currentTypeOffset;
public function __construct(array $rules)
{
$this->rules = $rules;
$this->types = array_keys($rules);
sort($this->types);
$this->rewind();
}
public function current()
{
return $this->rules[$this->currentType][$this->currentOffset];
}
public function key()
{
return $this->currentType;
}
public function next()
{
$this->currentOffset++;
if (!isset($this->rules[$this->currentType])) {
return;
}
if ($this->currentOffset >= sizeof($this->rules[$this->currentType])) {
$this->currentOffset = 0;
do {
$this->currentTypeOffset++;
if (!isset($this->types[$this->currentTypeOffset])) {
$this->currentType = -1;
break;
}
$this->currentType = $this->types[$this->currentTypeOffset];
} while (isset($this->types[$this->currentTypeOffset]) && !sizeof($this->rules[$this->currentType]));
}
}
public function rewind()
{
$this->currentOffset = 0;
$this->currentTypeOffset = -1;
$this->currentType = -1;
do {
$this->currentTypeOffset++;
if (!isset($this->types[$this->currentTypeOffset])) {
$this->currentType = -1;
break;
}
$this->currentType = $this->types[$this->currentTypeOffset];
} while (isset($this->types[$this->currentTypeOffset]) && !sizeof($this->rules[$this->currentType]));
}
public function valid()
{
return isset($this->rules[$this->currentType])
&& isset($this->rules[$this->currentType][$this->currentOffset]);
}
}