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                 $this->startPinger();
  30         }
  31
  32         public function getLogger() {
  33                 return $this->logger;
  34         }
  35
  36         public function getLoop() {
  37                 return Loop::get();
  38         }
  39
  40         public function run() {
  41                 $this->shutting_down = false;
  42                 $this->getLoop()->run();
  43         }
  44
  45         public function stop() {
  46                 $this->logger->info('shutting down');
  47                 $this->shutting_down = true;
  48                 $this->disconnect();
  49                 $this->getLoop()->stop();
  50         }
  51
  52
  53         public function connect() {
  54                 ($this->connector)('wss://irc-ws.chat.twitch.tv:443')->done(
  55                         [$this, 'handleWsConnect'],
  56                         [$this, 'handleWsConnectError'],
  57                 );
  58         }
  59
  60         public function disconnect() {
  61                 $this->ws->close();
  62         }
  63
  64         public function handleWsConnect(WebSocket $ws) {
  65                 $this->logger->info('websocket connection established');
  66                 $this->ws = $ws;
  67                 $ws->on('message', [$this, 'handleWsMessage']);
  68                 $ws->on('close', [$this, 'handleWsClose']);
  69                 $ws->on('error', [$this, 'handleWsError']);
  70                 $ws->send('CAP REQ :twitch.tv/tags twitch.tv/commands');
  71                 $this->login();
  72         }
  73
  74         public function handleWsConnectError(WebSocket $ws) {
  75                 $this->logger->error('failed to establish websocket connection');
  76         }
  77
  78         public function handleWsMessage(Message $message, WebSocket $ws) {
  79                 $irc_messages = explode("\r\n", rtrim($message->getPayload(), "\r\n"));
  80                 foreach ($irc_messages as $irc_message) {
  81                         $this->logger->info('received IRC message '.$irc_message);
  82                         $this->handleIRCMessage(IRCMessage::fromString($irc_message));
  83                 }
  84         }
  85
  86         public function handleWsClose(int $op, string $reason) {
  87                 $this->ready = false;
  88                 $this->logger->info('websocket connection closed: '.$reason.' ['.$op.']');
  89                 if (!$this->shutting_down) {
  90                         $this->logger->info('reconnecting in 5 seconds');
  91                         Loop::addTimer(5, [$this, 'connect']);
  92                 }
  93         }
  94
  95         public function handleWsError(\Exception $e, WebSocket $ws) {
  96                 $this->logger->error('websocket error '.$e->getMessage());
  97         }
  98
  99
 100         public function handleIRCMessage(IRCMessage $msg) {
 101                 $this->last_contact = time();
 102                 if ($msg->isPrivMsg()) {
 103                         $this->handlePrivMsg($msg);
 104                         return;
 105                 }
 106                 if ($msg->isPing()) {
 107                         $this->sendIRCMessage($msg->makePong());
 108                         return;
 109                 }
 110                 if ($msg->isPong()) {
 111                         return;
 112                 }
 113                 if ($msg->isNotice() && $msg->getText() == 'Login authentication failed') {
 114                         $this->logger->notice('login failed, refreshing access token');
 115                         $this->token->refresh();
 116                         $this->login();
 117                         return;
 118                 }
 119                 if ($msg->command == '001') {
 120                         // successful login
 121                         $this->joinChannels();
 122                         $this->ready = true;
 123                         return;
 124                 }
 125         }
 126
 127         public function handlePrivMsg(IRCMessage $msg) {
 128                 $target = $msg->getPrivMsgTarget();
 129                 if ($target[0] != '#') return;
 130                 $text = $msg->getText();
 131                 if ($text[0] != '!') return;
 132                 $channel = Channel::firstWhere('twitch_chat', '=', $target);
 133                 if (!$channel) return;
 134                 $this->handleChatCommand($channel, $msg);
 135         }
 136
 137         public function handleChatCommand(Channel $channel, IRCMessage $msg) {
 138                 $cmd = explode(' ', ltrim($msg->getText(), '!'), 2);
 139                 if (!isset($channel->chat_commands[$cmd[0]])) return;
 140                 $config = $channel->chat_commands[$cmd[0]];
 141                 $this->logger->info('got command '.$cmd[0].' on channel '.$channel->title);
 142                 try {
 143                         $command = ChatCommand::create($this, $channel, $config);
 144                         $command->execute($cmd[1] ?? '');
 145                 } catch (\Exception $e) {
 146                         $this->logger->warning('error executing command '.$cmd[0].' on channel '.$channel->title.': '.$e->getMessage());
 147                 }
 148         }
 149
 150         public function login() {
 151                 $this->ws->send('PASS oauth:'.$this->token->access);
 152                 $this->ws->send('NICK localhorsttv');
 153         }
 154
 155         public function joinChannels() {
 156                 $this->logger->info('joining channels');
 157                 $channels = Channel::where('twitch_chat', '!=', '')->where('join', '=', true)->get();
 158                 $names = [];
 159                 foreach ($channels as $channel) {
 160                         $names[] = $channel->twitch_chat;
 161                 }
 162                 $chunks = array_chunk($names, 10);
 163                 foreach ($chunks as $chunk) {
 164                         $this->sendIRCMessage(IRCMessage::join($chunk));
 165                 }
 166         }
 167
 168         private function listenCommands() {
 169                 $this->getLoop()->addPeriodicTimer(1, function () {
 170                         if (!$this->ready) return;
 171                         $command = TwitchBotCommand::where('status', '=', 'pending')->oldest()->first();
 172                         if ($command) {
 173                                 try {
 174                                         $command->execute($this);
 175                                 } catch (\Exception $e) {
 176                                 }
 177                         }
 178                 });
 179         }
 180
 181         private function startPinger() {
 182                 $this->getLoop()->addPeriodicTimer(15, function () {
 183                         if (!$this->ready) return;
 184                         if (time() - $this->last_contact < 60) return;
 185                         try {
 186                                 $this->sendIRCMessage(IRCMessage::ping());
 187                         } catch (\Exception $e) {
 188                         }
 189                 });
 190         }
 191
 192         public function sendIRCMessage(IRCMessage $msg) {
 193                 $irc_message = $msg->encode();
 194                 $this->logger->info('sending IRC message '.$irc_message);
 195                 $this->ws->send($irc_message);
 196                 $this->last_contact = time();
 197         }
 198
 199
 200         private $logger;
 201
 202         private $token;
 203
 204         private $connector;
 205         private $ws;
 206         private $ready = false;
 207         private $shutting_down = false;
 208
 209         private $last_contact;
 210
 211 }
 212
 213 ?>