Nette\Routing\Route::constructUrl PHP Метод

    public function constructUrl(array $params, Nette\Http\Url $refUrl)
    {
        if ($this->flags & self::ONE_WAY) {
            return NULL;
        }
        $metadata = $this->metadata;
        if (isset($metadata[NULL][self::FILTER_OUT])) {
            $params = call_user_func($metadata[NULL][self::FILTER_OUT], $params);
            if ($params === NULL) {
                return NULL;
            }
        }
        foreach ($metadata as $name => $meta) {
            if (!isset($params[$name])) {
                continue;
                // retains NULL values
            }
            if (isset($meta['fixity'])) {
                if ($params[$name] === FALSE) {
                    $params[$name] = '0';
                } elseif (is_scalar($params[$name])) {
                    $params[$name] = (string) $params[$name];
                }
                if ($params[$name] === $meta[self::VALUE]) {
                    // remove default values; NULL values are retain
                    unset($params[$name]);
                    continue;
                } elseif ($meta['fixity'] === self::CONSTANT) {
                    return NULL;
                    // missing or wrong parameter '$name'
                }
            }
            if (is_scalar($params[$name]) && isset($meta['filterTable2'][$params[$name]])) {
                $params[$name] = $meta['filterTable2'][$params[$name]];
            } elseif (isset($meta['filterTable2']) && !empty($meta[self::FILTER_STRICT])) {
                return NULL;
            } elseif (isset($meta[self::FILTER_OUT])) {
                $params[$name] = call_user_func($meta[self::FILTER_OUT], $params[$name]);
            }
            if (isset($meta[self::PATTERN]) && !preg_match($meta[self::PATTERN], rawurldecode($params[$name]))) {
                return NULL;
                // pattern not match
            }
        }
        // compositing path
        $sequence = $this->sequence;
        $brackets = [];
        $required = NULL;
        // NULL for auto-optional
        $url = '';
        $i = count($sequence) - 1;
        do {
            $url = $sequence[$i] . $url;
            if ($i === 0) {
                break;
            }
            $i--;
            $name = $sequence[$i];
            $i--;
            // parameter name
            if ($name === ']') {
                // opening optional part
                $brackets[] = $url;
            } elseif ($name[0] === '[') {
                // closing optional part
                $tmp = array_pop($brackets);
                if ($required < count($brackets) + 1) {
                    // is this level optional?
                    if ($name !== '[!') {
                        // and not "required"-optional
                        $url = $tmp;
                    }
                } else {
                    $required = count($brackets);
                }
            } elseif ($name[0] === '?') {
                // "foo" parameter
                continue;
            } elseif (isset($params[$name]) && $params[$name] != '') {
                // intentionally ==
                $required = count($brackets);
                // make this level required
                $url = $params[$name] . $url;
                unset($params[$name]);
            } elseif (isset($metadata[$name]['fixity'])) {
                // has default value?
                if ($required === NULL && !$brackets) {
                    // auto-optional
                    $url = '';
                } else {
                    $url = $metadata[$name]['defOut'] . $url;
                }
            } else {
                return NULL;
                // missing parameter '$name'
            }
        } while (TRUE);
        if ($this->type === self::HOST) {
            $host = $refUrl->getHost();
            $parts = ip2long($host) ? [$host] : array_reverse(explode('.', $host));
            $url = strtr($url, ['/%basePath%/' => $refUrl->getBasePath(), '%tld%' => $parts[0], '%domain%' => isset($parts[1]) ? "{$parts['1']}.{$parts['0']}" : $parts[0], '%sld%' => isset($parts[1]) ? $parts[1] : '', '%host%' => $host]);
            $url = ($this->scheme ?: $refUrl->getScheme()) . ':' . $url;
        } else {
            if ($this->lastRefUrl !== $refUrl) {
                $scheme = $this->scheme ?: $refUrl->getScheme();
                $basePath = $this->type === self::RELATIVE ? $refUrl->getBasePath() : '';
                $this->lastBaseUrl = $scheme . '://' . $refUrl->getAuthority() . $basePath;
                $this->lastRefUrl = $refUrl;
            }
            $url = $this->lastBaseUrl . $url;
        }
        if (strpos($url, '//', 7) !== FALSE) {
            return NULL;
        }
        // build query string
        if ($this->xlat) {
            $params = self::renameKeys($params, $this->xlat);
        }
        $sep = ini_get('arg_separator.input');
        $query = http_build_query($params, '', $sep ? $sep[0] : '&');
        if ($query != '') {
            // intentionally ==
            $url .= '?' . $query;
        }
        return $url;
    }