<?php

namespace ElephantIO\Parser\Websocket;

/**
 * Payload for sending data through the websocket.
 *
 * Loosely based on the work of the following:
 *   - Ludovic Barreca (@ludovicbarreca)
 *   - Byeoung Wook (@kbu1564)
 *
 * @link https://tools.ietf.org/html/rfc6455#section-5.2
 * @author Baptiste Clavié <baptiste@wisembly.com>
 */
abstract class Payload
{
    public const OPCODE_CONTINUE = 0;
    public const OPCODE_TEXT = 1;
    public const OPCODE_BINARY = 2;
    public const OPCODE_CLOSE = 8;
    public const OPCODE_PING = 9;
    public const OPCODE_PONG = 10;
    public const OPCODE_NON_CONTROL_RESERVED_1 = 3;
    public const OPCODE_NON_CONTROL_RESERVED_2 = 4;
    public const OPCODE_NON_CONTROL_RESERVED_3 = 5;
    public const OPCODE_NON_CONTROL_RESERVED_4 = 6;
    public const OPCODE_NON_CONTROL_RESERVED_5 = 7;
    public const OPCODE_CONTROL_RESERVED_1 = 11;
    public const OPCODE_CONTROL_RESERVED_2 = 12;
    public const OPCODE_CONTROL_RESERVED_3 = 13;
    public const OPCODE_CONTROL_RESERVED_4 = 14;
    public const OPCODE_CONTROL_RESERVED_5 = 15;

    protected $fin = 1;
    protected $rsv = [0, 0, 0];
    protected $mask = false;
    protected $maskKey = "\x00\x00\x00\x00";
    protected $opCode;
    protected $maxPayload = 0;

    /**
     * Get maximum payload length.
     *
     * @return int
     */
    public function getMaxPayload()
    {
        return $this->maxPayload;
    }

    /**
     * Set maximum payload length.
     *
     * @param int $length
     * @return \ElephantIO\Parser\Websocket\Payload
     */
    public function setMaxPayload($length)
    {
        $this->maxPayload = $length;

        return $this;
    }

    /**
     * Mask a data according to the current mask key.
     *
     * @param string $data Data to mask
     * @return string Masked data
     */
    protected function maskData($data)
    {
        $masked = '';
        $data = \str_split($data);
        $key = \str_split($this->maskKey);

        foreach ($data as $i => $letter) {
            $masked .= $letter ^ $key[$i % 4];
        }

        return $masked;
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----OTUxMTg4MTAwODkwMjE5NyA1MTAwMzYwOTU4ODgwNzY4IDE0MDg1MDc4MTcyMzM3NzM=