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