NoCandidateFoundException.php

<?php

namespace Http\Discovery\Exception;

use Http\Discovery\Exception;

/**
 * When we have used a strategy but no candidates provided by that strategy could be used.
 *
 * @author Tobias Nyholm <tobias.nyholm@gmail.com>
 */
final class NoCandidateFoundException extends \Exception implements Exception {
    
    /**
     * @param string $strategy
     */
    public function __construct($strategy, array $candidates) {
        $classes = array_map(function ($a) {
            return $a['class'];
        }, $candidates);
        $message = sprintf('No valid candidate found using strategy "%s". We tested the following candidates: %s.', $strategy, implode(', ', array_map([
            $this,
            'stringify',
        ], $classes)));
        parent::__construct($message);
    }
    private function stringify($mixed) {
        if (is_string($mixed)) {
            return $mixed;
        }
        if (is_array($mixed) && 2 === count($mixed)) {
            return sprintf('%s::%s', $this->stringify($mixed[0]), $mixed[1]);
        }
        return is_object($mixed) ? get_class($mixed) : gettype($mixed);
    }

}