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<?php
/*
* This file is part of the webmozart/expression package.
*
* (c) Bernhard Schussek <bschussek@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Webmozart\Expression\Selector;
use Traversable;
use Webmozart\Expression\Expression;
/**
* Checks that at least N iterator entries match an expression.
*
* @since 1.0
*
* @author Bernhard Schussek <bschussek@gmail.com>
*/
final class AtLeast extends Selector
{
/**
* @var int
*/
private $count;
/**
* Creates the expression.
*
* @param int $count The minimum number of entries that must match
* the expression.
* @param Expression $expr The expression to evaluate with each entry.
*/
public function __construct($count, Expression $expr)
{
parent::__construct($expr);
$this->count = (int) $count;
}
/**
* {@inheritdoc}
*/
public function evaluate($value)
{
if (!is_array($value) && !$value instanceof Traversable) {
return false;
}
$found = 0;
foreach ($value as $entry) {
if ($this->expr->evaluate($entry)) {
++$found;
if ($found >= $this->count) {
return true;
}
}
}
return false;
}
/**
* {@inheritdoc}
*/
public function equivalentTo(Expression $other)
{
if (!parent::equivalentTo($other)) {
return false;
}
/* @var static $other */
return $this->count === $other->count;
}
/**
* {@inheritdoc}
*/
public function toString()
{
return 'atLeast('.$this->count.', '.$this->expr->toString().')';
}
}