app/TwitchBot/TwitchBot.php

   1 <?php
   2
   3 namespace App\TwitchBot;
   4
   5 use App\Models\Channel;
   6 use App\Models\TwitchBotCommand;
   7 use App\Models\TwitchToken;
   8 use Monolog\Handler\StreamHandler;
   9 use Monolog\Logger;
  10 use Ratchet\Client\Connector;
  11 use Ratchet\Client\WebSocket;
  12 use Ratchet\RFC6455\Messaging\Message;
  13 use React\EventLoop\Loop;
  14
  15 class TwitchBot {
  16
  17         public function __construct($nick) {
  18                 $this->nick = $nick;
  19                 $this->logger = new Logger('TwitchBot');
  20                 $this->logger->pushHandler(new StreamHandler('php://stdout', Logger::INFO));
  21
  22                 $this->token = TwitchToken::firstWhere('nick', $nick);
  23                 if (!$this->token) {
  24                         throw new \Exception('unable to find access token');
  25                 }
  26                 if ($this->token->hasExpired()) {
  27                         $this->token->refresh();
  28                 }
  29
  30                 $this->connector = new Connector();
  31                 $this->connect();
  32                 $this->startPinger();
  33         }
  34
  35         public function getLogger() {
  36                 return $this->logger;
  37         }
  38
  39         public function getLoop() {
  40                 return Loop::get();
  41         }
  42
  43         public function isReady() {
  44                 return $this->ready;
  45         }
  46
  47         public function run() {
  48                 $this->shutting_down = false;
  49                 $this->getLoop()->run();
  50         }
  51
  52         public function stop() {
  53                 $this->logger->info('shutting down');
  54                 $this->shutting_down = true;
  55                 $this->disconnect();
  56                 $this->getLoop()->stop();
  57         }
  58
  59
  60         public function connect() {
  61                 ($this->connector)('wss://irc-ws.chat.twitch.tv:443')->done(
  62                         [$this, 'handleWsConnect'],
  63                         [$this, 'handleWsConnectError'],
  64                 );
  65         }
  66
  67         public function disconnect() {
  68                 $this->ws->close();
  69         }
  70
  71         public function handleWsConnect(WebSocket $ws) {
  72                 $this->logger->info('websocket connection established');
  73                 $this->ws = $ws;
  74                 $ws->on('message', [$this, 'handleWsMessage']);
  75                 $ws->on('close', [$this, 'handleWsClose']);
  76                 $ws->on('error', [$this, 'handleWsError']);
  77                 $ws->send('CAP REQ :twitch.tv/tags twitch.tv/commands');
  78                 $this->login();
  79         }
  80
  81         public function handleWsConnectError(WebSocket $ws) {
  82                 $this->logger->error('failed to establish websocket connection');
  83         }
  84
  85         public function handleWsMessage(Message $message, WebSocket $ws) {
  86                 $irc_messages = explode("\r\n", rtrim($message->getPayload(), "\r\n"));
  87                 foreach ($irc_messages as $irc_message) {
  88                         $this->logger->info('received IRC message '.$irc_message);
  89                         $this->handleIRCMessage(IRCMessage::fromString($irc_message));
  90                 }
  91         }
  92
  93         public function handleWsClose(int $op, string $reason) {
  94                 $this->ready = false;
  95                 $this->logger->info('websocket connection closed: '.$reason.' ['.$op.']');
  96                 if (!$this->shutting_down) {
  97                         $this->logger->info('reconnecting in 5 seconds');
  98                         Loop::addTimer(5, [$this, 'connect']);
  99                 }
 100         }
 101
 102         public function handleWsError(\Exception $e, WebSocket $ws) {
 103                 $this->logger->error('websocket error '.$e->getMessage());
 104         }
 105
 106
 107         public function handleIRCMessage(IRCMessage $msg) {
 108                 $this->last_contact = time();
 109                 if ($msg->isPing()) {
 110                         $this->sendIRCMessage($msg->makePong());
 111                         return;
 112                 }
 113                 if ($msg->isPong()) {
 114                         return;
 115                 }
 116                 $this->logMessage($msg);
 117                 if ($msg->isPrivMsg()) {
 118                         $this->handlePrivMsg($msg);
 119                         return;
 120                 }
 121                 if ($msg->isNotice() && $msg->getText() == 'Login authentication failed') {
 122                         $this->logger->notice('login failed, refreshing access token');
 123                         $this->token->refresh();
 124                         $this->login();
 125                         return;
 126                 }
 127                 if ($msg->command == '001') {
 128                         // successful login
 129                         $this->joinChannels();
 130                         $this->ready = true;
 131                         return;
 132                 }
 133         }
 134
 135         public function getMessageChannel(IRCMessage $msg) {
 136                 $target = $msg->getPrivMsgTarget();
 137                 if (substr($target, 0, 1) !== '#') {
 138                         $target = '#'.$target;
 139                 }
 140                 return Channel::firstWhere('twitch_chat', '=', $target);
 141         }
 142
 143         public function logMessage(IRCMessage $msg) {
 144         }
 145
 146         public function handlePrivMsg(IRCMessage $msg) {
 147         }
 148
 149         public function login() {
 150                 $this->ws->send('PASS oauth:'.$this->token->access);
 151                 $this->ws->send('NICK '.$this->nick);
 152         }
 153
 154         public function joinChannels() {
 155         }
 156
 157         private function startPinger() {
 158                 $this->getLoop()->addPeriodicTimer(15, function () {
 159                         if (!$this->ready) return;
 160                         if (time() - $this->last_contact < 60) return;
 161                         try {
 162                                 $this->sendIRCMessage(IRCMessage::ping($this->nick));
 163                         } catch (\Exception $e) {
 164                         }
 165                 });
 166         }
 167
 168         public function sendIRCMessage(IRCMessage $msg) {
 169                 $irc_message = $msg->encode();
 170                 $this->logger->info('sending IRC message '.$irc_message);
 171                 $this->ws->send($irc_message);
 172                 $this->last_contact = time();
 173         }
 174
 175
 176         protected function listenCommands() {
 177                 $this->getLoop()->addPeriodicTimer(1, function () {
 178                         if (!$this->isReady()) return;
 179                         $command = TwitchBotCommand::where('bot_nick', '=', $this->nick)->where('status', '=', 'pending')->oldest()->first();
 180                         if ($command) {
 181                                 try {
 182                                         $command->execute($this);
 183                                 } catch (\Exception $e) {
 184                                 }
 185                         }
 186                 });
 187         }
 188
 189
 190         private $logger;
 191
 192         private $nick;
 193         private $token;
 194
 195         private $connector;
 196         private $ws;
 197         private $ready = false;
 198         private $shutting_down = false;
 199
 200         private $last_contact;
 201
 202 }
 203
 204 ?>