Decoding

GoogleMapsQueryArgsDeserializer.php

class GoogleMapsQueryArgsDeserializer
{
    public static function deserialize(string $input): array
    {
        $params = explode('!', trim($input, '!'));

        foreach ($params as $i => $param) {
            $params[$i] = urldecode($param);
        }

        return static::decode($params);
    }

    protected static function decode(array $params): array
    {
        $data = [];

        for ($i=0; $i<count($params); $i++) {

            $param = $params[$i];

            if (preg_match('/^(\d+)m(\d+)/', $param, $matches)) {
                $id = intval($matches[1]);
                $length = intval($matches[2]);
                $data[$id] = static::decode(array_slice($params, $i+1, $length));
                $i = $i + $length;
            } elseif (preg_match('/^(\d+)([fdibesuv])(.*)$/', $param, $matches)) {
                $id = intval($matches[1]);
                $type = $matches[2];
                $value = $matches[3];
                if ($type === 'i' || $type === 'e' || $type === 'u') {
                    $data[$id] = intval($value);
                } elseif ($type === 'f') {
                    $data[$id] = floatval($value);
                } elseif ($type === 'd') {
                    $data[$id] = doubleval($value);
                } elseif ($type === 'b') {
                    $data[$id] = boolval($value);
                } elseif ($type === 's' || $type === 'v') {
                    $data[$id] = strval($value);
                }
            } else {
                throw new \RuntimeException('Unknown param format: ' . $param);
            }

        }

        return $data;
    }
}