MaxChatLength Client Side Impl

src/main/java/me/senseiwells/essentialclient/feature/CarpetClient.java

@@ -63,6 +63,10 @@ public boolean isCarpetManager(String name) {
 		return this.MANAGERS.contains(name);
 	}
 
+	public CarpetClientRule<?> getRule(String name) {
+		return this.CURRENT_RULES.get(name);
+	}
+
 	public void onDisconnect() {
 		this.isServerCarpet = false;
 		this.CURRENT_RULES.clear();

src/main/java/me/senseiwells/essentialclient/mixins/longChatMessages/ChatMessageC2SPacketMixin.java

@@ -0,0 +1,15 @@
+package me.senseiwells.essentialclient.mixins.longChatMessages;
+
+import me.senseiwells.essentialclient.utils.EssentialUtils;
+import net.minecraft.network.packet.c2s.play.ChatMessageC2SPacket;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.Constant;
+import org.spongepowered.asm.mixin.injection.ModifyConstant;
+
+@Mixin(ChatMessageC2SPacket.class)
+public class ChatMessageC2SPacketMixin {
+	@ModifyConstant(method = "<init>(Ljava/lang/String;)V", constant = @Constant(intValue = 256))
+	private int onMaxLength(int constant) {
+		return EssentialUtils.getMaxChatLength(constant);
+	}
+}

src/main/java/me/senseiwells/essentialclient/mixins/longChatMessages/ChatScreenMixin.java

@@ -0,0 +1,15 @@
+package me.senseiwells.essentialclient.mixins.longChatMessages;
+
+import me.senseiwells.essentialclient.utils.EssentialUtils;
+import net.minecraft.client.gui.screen.ChatScreen;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.Constant;
+import org.spongepowered.asm.mixin.injection.ModifyConstant;
+
+@Mixin(ChatScreen.class)
+public class ChatScreenMixin {
+	@ModifyConstant(method = "init", constant = @Constant(intValue = 256))
+	private int getMaxLength(int constant) {
+		return EssentialUtils.getMaxChatLength(constant);
+	}
+}

src/main/java/me/senseiwells/essentialclient/utils/EssentialUtils.java

@@ -1,5 +1,9 @@
 package me.senseiwells.essentialclient.utils;
 
+import me.senseiwells.essentialclient.feature.CarpetClient;
+import me.senseiwells.essentialclient.rule.carpet.CarpetClientRule;
+import me.senseiwells.essentialclient.rule.carpet.IntegerCarpetRule;
+import me.senseiwells.essentialclient.rule.carpet.StringCarpetRule;
 import me.senseiwells.essentialclient.utils.render.Texts;
 import net.fabricmc.loader.api.FabricLoader;
 import net.minecraft.MinecraftVersion;
@@ -123,6 +127,25 @@ public static boolean canMineBlock(ClientPlayerEntity player, BlockPos pos) {
 		return !state.isAir() && !state.contains(FluidBlock.LEVEL) && state.getHardness(null, null) >= 0;
 	}
 
+	public static int getMaxChatLength(int fallback) {
+		if (CarpetClient.INSTANCE.isServerCarpet()) {
+			CarpetClientRule<?> rule = CarpetClient.INSTANCE.getRule("maxChatLength");
+			if (rule instanceof IntegerCarpetRule intRule) {
+				int maxLength = intRule.getValue();
+				if (maxLength > 0) {
+					return maxLength;
+				}
+			}
+			if (rule instanceof StringCarpetRule stringRule) {
+				Integer maxLength = catchAsNull(() -> Integer.parseInt(stringRule.getValue()));
+				if (maxLength != null && maxLength >= 0) {
+					return maxLength;
+				}
+			}
+		}
+		return fallback;
+	}
+
 	public static void throwAsRuntime(ThrowableRunnable runnable) {
 		try {
 			runnable.run();

src/main/resources/essentialclient.mixins.json

@@ -59,6 +59,8 @@
     "gameRuleSync.RuleInvoker",
     "gameRuleSync.RuleMixin",
     "keyboard.KeyboardMixin",
+    "longChatMessages.ChatMessageC2SPacketMixin",
+    "longChatMessages.ChatScreenMixin"
     "mouseScrollRules.MouseMixin",
     "openScreenshotDirectory.ScreenshotRecorderMixin",
     "overrideCreativeWalkSpeed.LivingEntityMixin",