skyzyx/php-strong-types

<?php
/**
 * Copyright (c) 2014-2016 Ryan Parman.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * http://opensource.org/licenses/MIT
 */

namespace Skyzyx\StrongTypes;

use \UnexpectedValueException;

class OnlyOneOfCollection extends OneOfCollection
{
    /**
     * {@inheritdoc}
     */
    public function validate()
    {
        parent::validate();

        $x = [];
        $array_keys = array_keys($this->getValue());
        $required_keys = array_flip($this->requireOneKey());

        foreach ($array_keys as $key) {
            if (isset($required_keys[$key])) {
                $x[] = $key;
            }
        }

        if (count($x) > 1) {
            throw new UnexpectedValueException(
                sprintf('Only one of %s is allowed. Received %s instead.',
                    sprintf('`%s`',
                        implode('`, `', $this->requireOneKey())
                    ),
                    sprintf('`%s`',
                        implode('`, `', $x)
                    )
                )
            );
        }
    }

    /**
     * {@inheritdoc}
     */
    public function requireOneKey()
    {
        /** @var array */
        return [
            'boolean',
            'percentage',
            'schedule',
            'set',
        ];
    }
}