feat: add IRC

6 files changed, 485 insertions, 27 deletions

diff --git a/src/main/java/dev/plutorocks/IrcClient.java b/src/main/java/dev/plutorocks/IrcClient.java
new file mode 100644
index 0000000..f3abd40
--- /dev/null
+++ b/src/main/java/dev/plutorocks/IrcClient.java
@@ -0,0 +1,199 @@
+package dev.plutorocks;
+
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.text.MutableText;
+import net.minecraft.text.Text;
+import net.minecraft.util.Formatting;
+
+import java.io.*;
+import java.net.Socket;
+import java.nio.charset.StandardCharsets;
+
+public class IrcClient {
+
+    private final String host;
+    private final int port;
+    private final String channel;
+    private final String nick;
+
+    private volatile boolean running = false;
+    private volatile boolean connected = false;
+
+    private Socket socket;
+    private BufferedWriter writer;
+
+    public IrcClient(String host, int port, String channel, String nick) {
+        this.host = host;
+        this.port = port;
+        this.channel = channel.startsWith("#") ? channel : "#" + channel;
+        this.nick = nick;
+    }
+
+    /**
+     * start the IRC thread.
+     */
+    public void connect() {
+        if (running) return;
+        running = true;
+
+        Thread thread = new Thread(this::runLoop, "MinecraftIRC-Thread");
+        thread.setDaemon(true);
+        thread.start();
+    }
+
+    public boolean isConnected() {
+        return connected;
+    }
+
+    public void disconnect() {
+        running = false;
+        try {
+            if (socket != null && !socket.isClosed()) {
+                socket.close();
+            }
+        } catch (IOException ignored) {}
+        connected = false;
+    }
+
+    private void runLoop() {
+        try (Socket sock = new Socket(host, port);
+             BufferedReader reader = new BufferedReader(
+                     new InputStreamReader(sock.getInputStream(), StandardCharsets.UTF_8));
+             BufferedWriter writer = new BufferedWriter(
+                     new OutputStreamWriter(sock.getOutputStream(), StandardCharsets.UTF_8))) {
+
+            this.socket = sock;
+            this.writer = writer;
+            this.connected = true;
+
+            sendRaw("NICK " + nick);
+            sendRaw("USER " + nick + " 0 * :" + nick);
+
+            sendRaw("JOIN " + channel);
+
+            sendClientChat(
+                    Text.literal("[IRC] ").formatted(Formatting.AQUA)
+                            .append(Text.literal("Connected to " + host + " " + channel + " as " + nick)
+                                    .formatted(Formatting.GRAY))
+            );
+
+            String line;
+            while (running && (line = reader.readLine()) != null) {
+                handleLine(line);
+            }
+
+            if (running) {
+                sendClientChat(
+                        Text.literal("[IRC] ").formatted(Formatting.AQUA)
+                                .append(Text.literal("Disconnected from server. Use /irc connect to reconnect.")
+                                        .formatted(Formatting.GRAY))
+                );
+            }
+
+        } catch (IOException e) {
+            sendClientChat(
+                    Text.literal("[IRC] ").formatted(Formatting.AQUA)
+                            .append(Text.literal("Connection error: " + e.getMessage()
+                                            + " (use /irc connect to try again)")
+                                    .formatted(Formatting.GRAY))
+            );
+        } finally {
+            connected = false;
+            running = false;
+        }
+    }
+
+    private void handleLine(String line) {
+        // respond to server PINGs
+        if (line.startsWith("PING")) {
+            String payload = line.length() > 5 ? line.substring(5) : "";
+            sendRaw("PONG " + payload);
+            return;
+        }
+
+        // only care about PRIVMSG
+        if (!line.contains(" PRIVMSG ")) {
+            return;
+        }
+
+        int prefixEnd = line.indexOf(' ');
+        if (!line.startsWith(":") || prefixEnd <= 1) {
+            return;
+        }
+
+        String prefix = line.substring(1, prefixEnd);
+
+        String nick = prefix;
+        int bang = prefix.indexOf('!');
+        if (bang != -1) {
+            nick = prefix.substring(0, bang);
+        }
+
+        String[] split = line.split(" :", 2);
+        if (split.length < 2) {
+            return;
+        }
+
+        String trailing = split[1];
+        String commandPart = split[0];
+
+        String[] cmdParts = commandPart.split(" ");
+        if (cmdParts.length < 3) {
+            return;
+        }
+
+        String target = cmdParts[2];
+
+        if (!target.equalsIgnoreCase(this.channel)
+                && !target.equalsIgnoreCase(this.nick)) {
+            return;
+        }
+
+        MutableText prefixText = Text.literal("[IRC] ")
+                .formatted(Formatting.AQUA);
+        MutableText nickText = Text.literal("<" + nick + "> ")
+                .formatted(Formatting.WHITE);
+        MutableText msgText = Text.literal(trailing)
+                .formatted(Formatting.WHITE);
+
+        sendClientChat(prefixText.append(nickText).append(msgText));
+    }
+
+    /**
+     * sends a message to the configured channel
+     */
+    public void sendChannelMessage(String message) {
+        if (!connected) return;
+        sendRaw("PRIVMSG " + channel + " :" + message);
+    }
+
+    /**
+     * low-level raw IRC send
+     */
+    private synchronized void sendRaw(String line) {
+        if (writer == null) return;
+        try {
+            writer.write(line);
+            writer.write("\r\n");
+            writer.flush();
+        } catch (IOException e) {
+            sendClientChat(
+                    Text.literal("[IRC] ").formatted(Formatting.AQUA)
+                            .append(Text.literal("Send error: " + e.getMessage())
+                                    .formatted(Formatting.GRAY))
+            );
+            disconnect();
+        }
+    }
+
+    private void sendClientChat(Text text) {
+        MinecraftClient client = MinecraftClient.getInstance();
+        if (client == null) return;
+
+        client.execute(() -> {
+            if (client.inGameHud != null) {
+                client.inGameHud.getChatHud().addMessage(text);
+            }
+        });
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/dev/plutorocks/MinecraftIRC.java b/src/main/java/dev/plutorocks/MinecraftIRC.java
index a8aeed9..c802f20 100644
--- a/src/main/java/dev/plutorocks/MinecraftIRC.java
+++ b/src/main/java/dev/plutorocks/MinecraftIRC.java
@@ -1,24 +1,237 @@
 package dev.plutorocks;
 
-import net.fabricmc.api.ModInitializer;
+import com.google.gson.Gson;
+import com.google.gson.JsonSyntaxException;
+import com.mojang.brigadier.context.CommandContext;
+import com.mojang.brigadier.arguments.StringArgumentType;
+
+import net.fabricmc.api.ClientModInitializer;
+import net.fabricmc.fabric.api.client.command.v2.ClientCommandRegistrationCallback;
+import net.fabricmc.fabric.api.client.command.v2.FabricClientCommandSource;
+import net.fabricmc.fabric.api.client.message.v1.ClientSendMessageEvents;
+import net.fabricmc.loader.api.FabricLoader;
+
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.text.MutableText;
+import net.minecraft.text.Text;
+import net.minecraft.util.Formatting;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-public class MinecraftIRC implements ModInitializer {
+import java.io.IOException;
+import java.io.Reader;
+import java.io.Writer;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static net.fabricmc.fabric.api.client.command.v2.ClientCommandManager.argument;
+import static net.fabricmc.fabric.api.client.command.v2.ClientCommandManager.literal;
+
+public class MinecraftIRC implements ClientModInitializer {
 	public static final String MOD_ID = "minecraftirc";
 
-	// This logger is used to write text to the console and the log file.
-	// It is considered best practice to use your mod id as the logger's name.
-	// That way, it's clear which mod wrote info, warnings, and errors.
 	public static final Logger LOGGER = LoggerFactory.getLogger(MOD_ID);
 
+	private static final Gson GSON = new Gson();
+	private static final Path CONFIG_PATH = FabricLoader.getInstance().getConfigDir().resolve("minecraftirc.json");
+
+	public static String ircHost = "irc.libera.chat";
+	public static final int ircPort = 6667;
+	public static String ircChannel = "#chat";
+	public static String ircNick = "Player";
+
+	public static IrcClient IRC_CLIENT;
+
 	@Override
-	public void onInitialize() {
-		// This code runs as soon as Minecraft is in a mod-load-ready state.
-		// However, some things (like resources) may still be uninitialized.
-		// Proceed with mild caution.
+	public void onInitializeClient() {
+		loadConfig();
+
+		IRC_CLIENT = new IrcClient(ircHost, ircPort, ircChannel, ircNick);
+		IRC_CLIENT.connect();
+
+		ClientSendMessageEvents.CHAT.register(message -> {
+			if (message.startsWith("!")) {
+				if (IRC_CLIENT != null && IRC_CLIENT.isConnected()) {
+					IRC_CLIENT.sendChannelMessage(message.substring(1));
+				} else {
+					sendIrcMessage("Not connected.");
+				}
+			}
+		});
+
+		ClientCommandRegistrationCallback.EVENT.register((dispatcher, registryAccess) -> {
+			dispatcher.register(
+					literal("irc")
+							.then(literal("connect").executes(this::handleConnect))
+							.then(literal("disconnect").executes(this::handleDisconnect))
+							.then(literal("status").executes(this::handleStatus))
+							.then(literal("host")
+									.then(argument("host", StringArgumentType.word())
+											.executes(this::handleSetHost)))
+							.then(literal("channel")
+									.then(argument("channel", StringArgumentType.word())
+											.executes(this::handleSetChannel)))
+							.then(literal("nick")
+									.then(argument("nick", StringArgumentType.word())
+											.executes(this::handleSetNick)))
+			);
+		});
+
+		LOGGER.info("MinecraftIRC loaded!");
+	}
+
+	private static void loadConfig() {
+		if (!Files.exists(CONFIG_PATH)) {
+			applyDefaultsFromSession();
+			saveConfig();
+			return;
+		}
+
+		try (Reader reader = Files.newBufferedReader(CONFIG_PATH)) {
+			Config cfg = GSON.fromJson(reader, Config.class);
+			if (cfg == null) {
+				applyDefaultsFromSession();
+				saveConfig();
+				return;
+			}
+
+			if (cfg.host != null && !cfg.host.isEmpty()) {
+				ircHost = cfg.host;
+			} else {
+				ircHost = "irc.libera.chat";
+			}
+
+			if (cfg.channel != null && !cfg.channel.isEmpty()) {
+				ircChannel = normalizeChannel(cfg.channel);
+			} else {
+				ircChannel = normalizeChannel("chat");
+			}
+
+			if (cfg.nick != null && !cfg.nick.isEmpty()) {
+				ircNick = cfg.nick;
+			} else {
+				ircNick = defaultNickFromSession();
+			}
+		} catch (IOException | JsonSyntaxException e) {
+			LOGGER.warn("Failed to read MinecraftIRC config, using defaults", e);
+			applyDefaultsFromSession();
+		}
+	}
+
+	private static void saveConfig() {
+		Config cfg = new Config();
+		cfg.host = ircHost;
+		cfg.channel = ircChannel;
+		cfg.nick = ircNick;
+
+		try (Writer writer = Files.newBufferedWriter(CONFIG_PATH)) {
+			GSON.toJson(cfg, writer);
+		} catch (IOException e) {
+			LOGGER.warn("Failed to save MinecraftIRC config", e);
+		}
+	}
+
+	private static void applyDefaultsFromSession() {
+		ircHost = "irc.libera.chat";
+		ircChannel = normalizeChannel("chat");
+		ircNick = defaultNickFromSession();
+	}
+
+	private static String defaultNickFromSession() {
+		MinecraftClient client = MinecraftClient.getInstance();
+		if (client != null && client.getSession() != null) {
+			String name = client.getSession().getUsername();
+			if (name != null && !name.isEmpty()) {
+				return name;
+			}
+		}
+		return "Player";
+	}
+
+	private int handleConnect(CommandContext<FabricClientCommandSource> ctx) {
+		if (IRC_CLIENT != null && IRC_CLIENT.isConnected()) {
+			IRC_CLIENT.disconnect();
+		}
+
+		IRC_CLIENT = new IrcClient(ircHost, ircPort, ircChannel, ircNick);
+
+		sendCmdFeedback(ctx, "Connecting to " + ircHost + " " + ircChannel
+				+ " as " + ircNick + " (port " + ircPort + ")...");
+		IRC_CLIENT.connect();
+		return 1;
+	}
+
+	private int handleDisconnect(CommandContext<FabricClientCommandSource> ctx) {
+		if (IRC_CLIENT == null || !IRC_CLIENT.isConnected()) {
+			sendCmdFeedback(ctx, "Already disconnected.");
+			return 1;
+		}
+
+		IRC_CLIENT.disconnect();
+		sendCmdFeedback(ctx, "Disconnected.");
+		return 1;
+	}
+
+	private int handleStatus(CommandContext<FabricClientCommandSource> ctx) {
+		String state = (IRC_CLIENT != null && IRC_CLIENT.isConnected()) ? "Connected" : "Not connected";
+		sendCmdFeedback(ctx, state + ". Host=" + ircHost
+				+ " Channel=" + ircChannel + " Nick=" + ircNick
+				+ " Port=" + ircPort);
+		return 1;
+	}
+
+	private int handleSetHost(CommandContext<FabricClientCommandSource> ctx) {
+		ircHost = StringArgumentType.getString(ctx, "host");
+		saveConfig();
+		sendCmdFeedback(ctx, "Host set to " + ircHost + ". Use /irc connect to apply.");
+		return 1;
+	}
+
+	private static String normalizeChannel(String raw) {
+		raw = raw.trim();
+		if (raw.isEmpty()) return "#chat";
+		if (!raw.startsWith("#")) raw = "#" + raw;
+		return raw;
+	}
+
+	private int handleSetChannel(CommandContext<FabricClientCommandSource> ctx) {
+		String raw = StringArgumentType.getString(ctx, "channel");
+		ircChannel = normalizeChannel(raw);
+		saveConfig();
+		sendCmdFeedback(ctx, "Channel set to " + ircChannel + ". Use /irc connect to apply.");
+		return 1;
+	}
+
+	private int handleSetNick(CommandContext<FabricClientCommandSource> ctx) {
+		ircNick = StringArgumentType.getString(ctx, "nick");
+		saveConfig();
+		sendCmdFeedback(ctx, "Nick set to " + ircNick + ". Use /irc connect to apply.");
+		return 1;
+	}
+
+	private void sendCmdFeedback(CommandContext<FabricClientCommandSource> ctx, String grayMessage) {
+		MutableText prefix = Text.literal("[IRC] ").formatted(Formatting.AQUA);
+		MutableText body = Text.literal(grayMessage).formatted(Formatting.GRAY);
+		ctx.getSource().sendFeedback(prefix.append(body));
+	}
+
+	private void sendIrcMessage(String grayMessage) {
+		MinecraftClient client = MinecraftClient.getInstance();
+		if (client == null) return;
+
+		client.execute(() -> {
+			if (client.inGameHud != null) {
+				MutableText prefix = Text.literal("[IRC] ").formatted(Formatting.AQUA);
+				MutableText body = Text.literal(grayMessage).formatted(Formatting.GRAY);
+				client.inGameHud.getChatHud().addMessage(prefix.append(body));
+			}
+		});
+	}
 
-		LOGGER.info("Hello Fabric world!");
+	private static class Config {
+		String host;
+		String channel;
+		String nick;
 	}
 }
\ No newline at end of file
diff --git a/src/main/java/dev/plutorocks/mixin/ChatScreenMixin.java b/src/main/java/dev/plutorocks/mixin/ChatScreenMixin.java
new file mode 100644
index 0000000..6bc044d
--- /dev/null
+++ b/src/main/java/dev/plutorocks/mixin/ChatScreenMixin.java
@@ -0,0 +1,61 @@
+package dev.plutorocks.mixin;
+
+import dev.plutorocks.MinecraftIRC;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.gui.screen.ChatScreen;
+import net.minecraft.text.MutableText;
+import net.minecraft.text.Text;
+import net.minecraft.util.Formatting;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(ChatScreen.class)
+public abstract class ChatScreenMixin {
+
+    @Inject(method = "sendMessage", at = @At("HEAD"), cancellable = true)
+    private void minecraftirc$interceptIrcMessages(String chatText, boolean addToHistory, CallbackInfo ci) {
+        if (chatText == null) {
+            return;
+        }
+
+        String trimmed = chatText.trim();
+        if (!trimmed.startsWith("!")) {
+            return;
+        }
+
+        String ircMessage = trimmed.substring(1);
+
+        MinecraftClient client = MinecraftClient.getInstance();
+
+        if (MinecraftIRC.IRC_CLIENT != null && MinecraftIRC.IRC_CLIENT.isConnected()) {
+            if (!ircMessage.isEmpty()) {
+                MinecraftIRC.IRC_CLIENT.sendChannelMessage(ircMessage);
+            }
+
+            if (client != null && client.inGameHud != null) {
+                MutableText prefix = Text.literal("[IRC] ").formatted(Formatting.AQUA);
+                MutableText nick = Text.literal("<" + MinecraftIRC.ircNick + "> ")
+                        .formatted(Formatting.WHITE);
+                MutableText body = Text.literal(ircMessage)
+                        .formatted(Formatting.GRAY);
+
+                client.inGameHud.getChatHud().addMessage(
+                        prefix.append(nick).append(body)
+                );
+            }
+        } else {
+            if (client != null && client.inGameHud != null) {
+                MutableText prefix = Text.literal("[IRC] ").formatted(Formatting.AQUA);
+                MutableText body = Text.literal("Not connected.")
+                        .formatted(Formatting.GRAY);
+                client.inGameHud.getChatHud().addMessage(
+                        prefix.append(body)
+                );
+            }
+        }
+
+        ci.cancel();
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/dev/plutorocks/mixin/ExampleMixin.java b/src/main/java/dev/plutorocks/mixin/ExampleMixin.java
deleted file mode 100644
index da1eff9..0000000
--- a/src/main/java/dev/plutorocks/mixin/ExampleMixin.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package dev.plutorocks.mixin;
-
-import net.minecraft.server.MinecraftServer;
-import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.injection.At;
-import org.spongepowered.asm.mixin.injection.Inject;
-import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
-
-@Mixin(MinecraftServer.class)
-public class ExampleMixin {
-	@Inject(at = @At("HEAD"), method = "loadWorld")
-	private void init(CallbackInfo info) {
-		// This code is injected into the start of MinecraftServer.loadWorld()V
-	}
-}
\ No newline at end of file
diff --git a/src/main/resources/fabric.mod.json b/src/main/resources/fabric.mod.json
index 3bc9b56..c326293 100644
--- a/src/main/resources/fabric.mod.json
+++ b/src/main/resources/fabric.mod.json
@@ -15,7 +15,7 @@
 	"icon": "assets/minecraftirc/icon.png",
 	"environment": "*",
 	"entrypoints": {
-		"main": [
+		"client": [
 			"dev.plutorocks.MinecraftIRC"
 		]
 	},
diff --git a/src/main/resources/minecraftirc.mixins.json b/src/main/resources/minecraftirc.mixins.json
index da52128..fc6e0cd 100644
--- a/src/main/resources/minecraftirc.mixins.json
+++ b/src/main/resources/minecraftirc.mixins.json
@@ -3,7 +3,7 @@
 	"package": "dev.plutorocks.mixin",
 	"compatibilityLevel": "JAVA_21",
 	"mixins": [
-		"ExampleMixin"
+		"ChatScreenMixin"
 	],
 	"injectors": {
 		"defaultRequire": 1