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<?php

/*
 * This file is part of Respect/Validation.
 *
 * (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net>
 *
 * For the full copyright and license information, please view the "LICENSE.md"
 * file that was distributed with this source code.
 */

namespace Respect\Validation\Rules;

use Respect\Validation\Exceptions\AlwaysInvalidException;
use Respect\Validation\Validatable;

class When extends AbstractRule
{
    public $when;
    public $then;
    public $else;

public function __construct(Validatable $when, Validatable $then, Validatable $else = null)
    {
        $this->when = $when;
        $this->then = $then;
        if (null === $else) {
            $else = new AlwaysInvalid();
            $else->setTemplate(AlwaysInvalidException::SIMPLE);
        }

$this->else = $else;
    }

public function validate($input)
    {
        if ($this->when->validate($input)) {
            return $this->then->validate($input);
        }

return $this->else->validate($input);
    }

public function assert($input)
    {
        if ($this->when->validate($input)) {
            return $this->then->assert($input);
        }

return $this->else->assert($input);
    }

public function check($input)
    {
        if ($this->when->validate($input)) {
            return $this->then->check($input);
        }

return $this->else->check($input);
    }
}