Feature: AntiSpam module

src/main/java/com/lambda/mixin/render/ChatHudMixin.java

@@ -17,15 +17,15 @@
 
 package com.lambda.mixin.render;
 
-import com.lambda.module.modules.client.LambdaMoji;
+import com.lambda.event.EventFlow;
+import com.lambda.event.events.ChatEvent;
+import com.llamalad7.mixinextras.injector.wrapmethod.WrapMethod;
 import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
-import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
-import net.minecraft.client.font.TextRenderer;
-import net.minecraft.client.gui.DrawContext;
 import net.minecraft.client.gui.hud.ChatHud;
-import net.minecraft.text.OrderedText;
+import net.minecraft.client.gui.hud.MessageIndicator;
+import net.minecraft.network.message.MessageSignatureData;
+import net.minecraft.text.Text;
 import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.injection.At;
 
 @Mixin(ChatHud.class)
 public class ChatHudMixin {
@@ -41,4 +41,12 @@ public class ChatHudMixin {
 //    int wrapRenderCall(DrawContext instance, TextRenderer textRenderer, OrderedText text, int x, int y, int color, Operation<Integer> original) {
 //        return original.call(instance, textRenderer, LambdaMoji.INSTANCE.parse(text, x, y, color), 0, y, 16777215 + (color << 24));
 //    }
+
+    @WrapMethod(method = "addMessage(Lnet/minecraft/text/Text;Lnet/minecraft/network/message/MessageSignatureData;Lnet/minecraft/client/gui/hud/MessageIndicator;)V")
+    void wrapAddMessage(Text message, MessageSignatureData signatureData, MessageIndicator indicator, Operation<Void> original) {
+        var event = new ChatEvent.Message(message, signatureData, indicator);
+
+        if (!EventFlow.post(event).isCanceled())
+            original.call(event.getMessage(), event.getSignature(), event.getIndicator());
+    }
 }

src/main/kotlin/com/lambda/config/groups/ReplaceConfig.kt

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2025 Lambda
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.lambda.config.groups
+
+import com.lambda.util.Describable
+
+interface ReplaceConfig {
+	val action: ActionStrategy
+	val replace: ReplaceStrategy
+
+	val enabled: Boolean get() = action != ActionStrategy.None
+
+	enum class ActionStrategy(override val description: String) : Describable {
+		Hide("Hides the message. Will override other strategies."),
+		Delete("Deletes the matching part off the message."),
+		Replace("Replace the matching string in the message with one of the following replace strategy."),
+		None("Don't do anything."),
+	}
+
+	enum class ReplaceStrategy(val block: (String) -> String) {
+		CensorAll({ it.replaceRange(0..<it.length, "*".repeat(it.length))}),
+		CensorHalf({ it.foldIndexed("") { i, acc, char -> if (i % 2 == 0) acc + char else "$acc*" } }),
+		KeepFirst({ it.replaceRange(1..<it.length, "*".repeat(it.length-1))}),
+	}
+}

src/main/kotlin/com/lambda/event/events/ChatEvent.kt

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2025 Lambda
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.lambda.event.events
+
+import com.lambda.event.Event
+import com.lambda.event.callback.Cancellable
+import net.minecraft.client.gui.hud.MessageIndicator
+import net.minecraft.network.message.MessageSignatureData
+import net.minecraft.text.Text
+
+sealed class ChatEvent {
+	class Message(
+		var message: Text,
+		var signature: MessageSignatureData?,
+		var indicator: MessageIndicator?,
+	) : Event, Cancellable()
+}

src/main/kotlin/com/lambda/module/modules/chat/AntiSpam.kt

@@ -0,0 +1,104 @@
+/*
+ * Copyright 2025 Lambda
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.lambda.module.modules.chat
+
+import com.lambda.config.Configurable
+import com.lambda.config.SettingGroup
+import com.lambda.config.groups.ReplaceConfig
+import com.lambda.event.events.ChatEvent
+import com.lambda.event.listener.SafeListener.Companion.listen
+import com.lambda.module.Module
+import com.lambda.module.tag.ModuleTag
+import com.lambda.util.NamedEnum
+import net.minecraft.text.Text
+
+object AntiSpam : Module(
+	name = "AntiSpam",
+	description = "Keeps your chat clean",
+	tag = ModuleTag.CHAT,
+) {
+	private val detectSlurs = ReplaceSettings("Slurs", this, Group.Slurs)
+	private val detectSwears = ReplaceSettings("Swears", this, Group.Swears)
+	private val detectSexual = ReplaceSettings("Sexual", this, Group.Sexual)
+	private val detectAddresses = ReplaceSettings("Addresses", this, Group.Addresses)
+
+	val slurs = sequenceOf("\\bch[i1l]nks?\\b", "\\bc[o0]{2}ns?\\b", "f[a@4](g{1,2}|qq)([e3il1o0]t{1,2}(ry|r[i1l]e)?)?\\b", "\\bk[il1y]k[e3](ry|r[i1l]e)?s?\\b", "\\b(s[a4]nd)?n[ila4o10][gq]{1,2}(l[e3]t|[e3]r|[a4]|n[o0]g)?s?\\b", "\\btr[a4]n{1,2}([il1][e3]|y|[e3]r)s?\\b").map { Regex(it) }
+	val swears = sequenceOf("fuck(er)?", "shit", "cunt", "puss(ie|y)", "bitch", "twat").map { Regex(it) }
+	val sexual = sequenceOf("^cum[s\\$]?$", "cumm?[i1]ng", "h[o0]rny", "mast(e|ur)b(8|ait|ate)").map { Regex(it) }
+	val addresses = sequenceOf("^((25[0-5]|2[0-4]\\d|1\\d{2}|[1-9]?\\d)(\\.)){3}(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9]?\\d)$", "^(\\:\\:)?[0-9a-fA-F]{1,4}(\\:\\:?[0-9a-fA-F]{1,4}){0,7}(\\:\\:)?$", "[A-Za-z0-9-]{1,63}\\.[A-Za-z]{2,6}$").map { Regex(it) }
+
+	enum class Group(override val displayName: String) : NamedEnum {
+		Slurs("Slurs"),
+		Swears("Swears"),
+		Sexual("Sexual"),
+		Addresses("IPs and Addresses"),
+	}
+
+	init {
+		listen<ChatEvent.Message> { event ->
+			val author = event.message.string.substringBefore(' ')
+			var content = event.message.string.substringAfter(' ')
+
+			val slurMatches = slurs.takeIf { detectSlurs.enabled }.orEmpty()
+				.flatMap { it.findAll(content).toList().reversed() }
+
+			val swearMatches = swears.takeIf { detectSwears.enabled }.orEmpty()
+				.flatMap { it.findAll(content).toList().reversed() }
+
+			val sexualMatches = sexual.takeIf { detectSexual.enabled }.orEmpty()
+				.flatMap { it.findAll(content).toList().reversed() }
+
+			val addressMatches = addresses.takeIf { detectAddresses.enabled }.orEmpty()
+				.flatMap { it.findAll(content).toList().reversed() }
+
+			var cancelled = false
+			var hasMatches = false
+
+			fun doMatch(replace: ReplaceConfig, matches: Sequence<MatchResult>) {
+				if (cancelled) return
+
+				when (replace.action) {
+					ReplaceConfig.ActionStrategy.Hide -> matches.firstOrNull()?.let { event.cancel(); cancelled = true } // If there's one detection, nuke the whole damn thang
+					ReplaceConfig.ActionStrategy.Delete -> matches
+						.forEach { content = content.replaceRange(it.range, ""); hasMatches = true }
+					ReplaceConfig.ActionStrategy.Replace -> matches
+						.forEach { content = content.replaceRange(it.range, replace.replace.block(it.value)); hasMatches = true }
+					ReplaceConfig.ActionStrategy.None -> {}
+				}
+			}
+
+			doMatch(detectSlurs, slurMatches)
+			doMatch(detectSwears, swearMatches)
+			doMatch(detectSexual, sexualMatches)
+			doMatch(detectAddresses, addressMatches)
+
+			if (!hasMatches) return@listen
+
+			event.message = Text.of("$author $content")
+		}
+	}
+
+	class ReplaceSettings(
+		name: String,
+		c: Configurable,
+		baseGroup: NamedEnum,
+	) : ReplaceConfig, SettingGroup(c) {
+		override val action by setting("$name Action Strategy", ReplaceConfig.ActionStrategy.Replace).group(baseGroup)
+		override val replace by setting("$name Replace Strategy", ReplaceConfig.ReplaceStrategy.CensorAll) { action == ReplaceConfig.ActionStrategy.Replace }.group(baseGroup)
+	}
+}

src/main/kotlin/com/lambda/module/tag/ModuleTag.kt

@@ -40,12 +40,13 @@ data class ModuleTag(override val name: String) : Nameable {
         val MOVEMENT = ModuleTag("Movement")
         val RENDER = ModuleTag("Render")
         val PLAYER = ModuleTag("Player")
+        val CHAT = ModuleTag("Chat")
         val CLIENT = ModuleTag("Client")
         val NETWORK = ModuleTag("Network")
         val DEBUG = ModuleTag("Debug")
         val HUD = ModuleTag("Hud")
 
-        val defaults = setOf(COMBAT, MOVEMENT, RENDER, PLAYER, NETWORK, CLIENT, HUD)
+        val defaults = setOf(COMBAT, MOVEMENT, RENDER, PLAYER, NETWORK, CHAT, CLIENT, HUD)
 
         val shownTags = defaults.toMutableSet()