172 lines
3.1 KiB
PHP
172 lines
3.1 KiB
PHP
<?php
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namespace App\Support;
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/**
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* Class Packet
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*/
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class Packet
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{
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/**
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* Socket.io packet type `open`.
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*/
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const OPEN = 0;
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/**
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* Socket.io packet type `close`.
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*/
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const CLOSE = 1;
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/**
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* Socket.io packet type `ping`.
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*/
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const PING = 2;
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/**
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* Socket.io packet type `pong`.
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*/
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const PONG = 3;
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/**
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* Socket.io packet type `message`.
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*/
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const MESSAGE = 4;
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/**
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* Socket.io packet type 'upgrade'
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*/
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const UPGRADE = 5;
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/**
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* Socket.io packet type `noop`.
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*/
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const NOOP = 6;
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/**
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* Engine.io packet type `connect`.
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*/
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const CONNECT = 0;
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/**
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* Engine.io packet type `disconnect`.
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*/
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const DISCONNECT = 1;
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/**
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* Engine.io packet type `event`.
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*/
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const EVENT = 2;
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/**
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* Engine.io packet type `ack`.
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*/
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const ACK = 3;
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/**
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* Engine.io packet type `error`.
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*/
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const ERROR = 4;
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/**
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* Engine.io packet type 'binary event'
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*/
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const BINARY_EVENT = 5;
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/**
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* Engine.io packet type `binary ack`. For acks with binary arguments.
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*/
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const BINARY_ACK = 6;
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/**
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* Socket.io packet types.
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*/
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public static $socketTypes = [
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0 => 'OPEN',
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1 => 'CLOSE',
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2 => 'PING',
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3 => 'PONG',
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4 => 'MESSAGE',
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5 => 'UPGRADE',
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6 => 'NOOP',
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];
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/**
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* Engine.io packet types.
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*/
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public static $engineTypes = [
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0 => 'CONNECT',
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1 => 'DISCONNECT',
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2 => 'EVENT',
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3 => 'ACK',
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4 => 'ERROR',
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5 => 'BINARY_EVENT',
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6 => 'BINARY_ACK',
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];
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/**
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* Get socket packet type of a raw payload.
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*
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* @param string $packet
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*
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* @return int|null
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*/
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public static function getSocketType(string $packet)
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{
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$type = $packet[0] ?? null;
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if (!array_key_exists($type, static::$socketTypes)) {
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return null;
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}
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return (int)$type;
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}
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/**
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* Get data packet from a raw payload.
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*
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* @param string $packet
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*
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* @return array|null
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*/
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public static function getPayload(string $packet)
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{
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$packet = trim($packet);
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$start = strpos($packet, '[');
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if ($start === false || substr($packet, -1) !== ']') {
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return null;
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}
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$data = substr($packet, $start, strlen($packet) - $start);
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$data = json_decode($data, true);
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if (is_null($data)) {
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return null;
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}
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return [
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'event' => $data[0],
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'data' => $data[1] ?? null,
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];
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}
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/**
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* Return if a socket packet belongs to specific type.
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*
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* @param $packet
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* @param string $typeName
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*
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* @return bool
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*/
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public static function isSocketType($packet, string $typeName)
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{
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$type = array_search(strtoupper($typeName), static::$socketTypes);
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if ($type === false) {
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return false;
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}
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return static::getSocketType($packet) === $type;
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}
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}
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