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<?php declare(strict_types=1);
/**
 * Copyright (c) 2017 Holger Woltersdorf & Contributors
 * 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.
 */
namespace IceHawk\IceHawk\Routing\Patterns;
use IceHawk\IceHawk\Routing\Interfaces\ProvidesMatchResult;
/**
 * Class RegExp
 * @package IceHawk\IceHawk\Routing\Patterns
 */
final class RegExp implements ProvidesMatchResult
{
    /** @var string */
    private $regExp;
    /** @var array */
    private $matchKeys;
    /** @var array */
    private $matchValues;
    public function __construct( $regExp, array $matchKeys = [] )
    {
        $this->regExp      = $regExp;
        $this->matchKeys   = array_values( $matchKeys );
        $this->matchValues = [];
    }
    public function matches( string $other ) : bool
    {
        return (bool)preg_match( $this->regExp, $other, $this->matchValues );
    }
    public function getMatches() : array
    {
        if ( empty( $this->matchValues ) )
        {
            return [];
        }
        $matches = [];
        foreach ( $this->matchKeys as $index => $key )
        {
            $matches[ $key ] = $this->matchValues[ $index + 1 ] ?? null;
        }
        return $matches;
    }
}