GameQ\Protocols\Raknet::processResponse()

Complexity

Conditions	3
Paths	3

Size

Total Lines	56
Code Lines	29

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

<?php
    public function processResponse()
    {
        // Merge the response array into a buffer. Unknown if this protocol does split packets or not
        $buffer = new Buffer(implode($this->packets_response));

        // Read first character from response. It should match below
        $header = $buffer->read(1);

        // Check first character to make sure the header matches
        if ($header !== self::ID_UNCONNECTED_PONG) {
            throw new Exception(sprintf('The header returned "%s" does not match the expected header of "%s"!', $header,
                self::ID_UNCONNECTED_PONG));
        }

        // Burn the time section
        $buffer->skip(8);

        // Server GUID is next
        $serverGUID = $buffer->readInt64();

        // Read the next set to check to make sure the "magic" matches
        $magicCheck = $buffer->read(16);

        // Magic check fails
        if ($magicCheck !== self::OFFLINE_MESSAGE_DATA_ID) {
            throw new Exception(sprintf('The magic value returned "%s" does not match the expected value of "%s"!',
                $magicCheck, self::OFFLINE_MESSAGE_DATA_ID));
        }

        // According to docs the next character is supposed to be used for a length and string for the following character for the MOTD but it appears to be implemented incorrectly
        // Burn the next two characters instead of trying to do anything useful with them
        $buffer->skip(2);

        // Set the result to a new result instance
        $result = new Result();

        // Here on is server information delimited by semicolons (;)
        $info = explode(';', $buffer->getBuffer());

        $result->add('edition', $info[0]);
        $result->add('motd_line_1', $info[1]);
        $result->add('protocol_version', (int)$info[2]);
        $result->add('version', $info[3]);
        $result->add('num_players', $info[4]);
        $result->add('max_players', $info[5]);
        $result->add('server_uid', $info[6]);
        $result->add('motd_line_2', $info[7]);
        $result->add('gamemode', $info[8]);
        $result->add('gamemode_numeric', (int)$info[9]);
        $result->add('port_ipv4', (int)$info[10]);
        $result->add('port_ipv6', (int)$info[11]);
        $result->add('dedicated', 1);

        unset($header, $serverGUID, $magicCheck, $info);

        return $result->fetch();
    }