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--- programming:irc [2021/06/03 05:52]
nanodano
+++ programming:irc [2022/03/13 16:49] (current)
nanodano
@@ Line 3: / Line 3: @@
 IRC stands for Internet Relay Chat.
-===== DevDungeon IRC Server =====
-Connect to the DevDungeon IRC server at ''irc.devdungeon.com'' on port ''6667''.
-<code>
-irc.devdungeon.com
-</code>
 ===== 2-minute Intro to IRC =====
@@ Line 19: / Line 12: @@
 </html>
+===== Using IRC with netcat =====
+<html>
+<center>
+<iframe width="560" height="315" src="https://www.youtube.com/embed/FDrR98ww6bE" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
+</center>
+</html>
 ===== Basics =====
@@ Line 48: / Line 48: @@
   * [[https://pidgin.im/|Pidgin]] (GUI) - For Windows, download and install from the website. For Debian, install with ''apt install pidgin''. Pidgin is nice because it supports other protocols too so you can have your XMPP account and IRC setup together.
   * [[other:irssi_terminal_chat|irssi]] (Terminal) - For Windows, use Debian WSL. In Debian, install with ''apt install irssi''. In Mac, ''brew install irssi''. Use the normal IRC slash commands like ''/list'' and ''/join #general''. Use alt keys plus window number to switch between chat windows. E.g. ''ALT-1'' and ''ALT-2''.
+  * netcat - You can use netcat as a client if you understand the IRC protocol. Check out my video tutorial [[https://youtu.be/FDrR98ww6bE|IRC with netcat]].
+===== Node.js Bot =====
+<code javascript simple_irc_bot.js>
+var net = require('net');  // https://nodejs.org/dist/latest/docs/api/net.html
+var BOT_NAME = 'mybot2';
+var BOT_CHANNEL = '#bots';
+var client = new net.Socket();
+client.connect(6667, 'irc.devdungeon.com', function() {
+  client.write('USER ' + BOT_NAME +  ' 0 * :' + BOT_NAME + '\n');
+  client.write('NICK ' + BOT_NAME + '\n'); // Must wait a second to register
+  setTimeout(function(){
+      client.write('JOIN ' + BOT_CHANNEL + '\n');
+      client.write('PRIVMSG ' + BOT_CHANNEL + ' Hello my Node.js bot is online!\n');
+   }, 3000);
+});
+client.on('data', function(data) {
+  console.log('MESSAGE_FROM_SERVER: ' + data);
+ var text = data.toString();
+ var splitText = text.split(' ');
+  // If data starts with PING, respond with PONG :whatever
+  if (text.startsWith('PING')) {
+    client.write('PONG ' + text.substring(5));  // Remove `PING ` and pong back what it sent me
+    console.log('Recieved PING. PONGED.');
+  } else if (splitText[1] == 'PRIVMSG') { // PM or chat room
+    // If data comes from a channel (#general):
+    //   :nanodano!johnd@107.181.165.217 PRIVMSG #general :Hello bot
+    // If data comes from privmsg (dano):
+    //   :nanodano!johnd@107.181.165.217 PRIVMSG danobot :hey
+    console.log('Destination:' + splitText[2])
+    // Was it a direct message or to the channel?
+    if (splitText[2] == BOT_CHANNEL) {
+       console.log('message was from ' + BOT_CHANNEL)
+    }
+    if (splitText[2] == BOT_NAME) {
+       console.log('message was directly to me (' + BOT_NAME + ')')
+    }
+    // Was the message a command?
+    if (splitText[3].substring(1).startsWith('!')) {
+      console.log('Command detected with ! prefix')
+      // Cut off first character, and check command. Run appropriate function. !bitcoin. !ping !8-ball
+      var command = splitText[3].substring(2).trim().toLowerCase();
+      console.log('Command: `' + command + '`');
+      if (command == 'ping') {
+        console.log('Ping command detected! Ponging.');
+        client.write('PRIVMSG ' + BOT_CHANNEL + ' Pong\n');
+      }
+    }
+    console.log('PrivMsg: ' + splitText[3].substring(1)); // Cut off : in front
+  } else {
+    console.log('Discarded unexpected/unimportant message.');
+  }
+});
+</code>

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