added creply / cr

src/main/java/net/earthcomputer/clientcommands/ClientCommands.java

@@ -158,6 +158,7 @@ public static void registerCommands(CommandDispatcher<FabricClientCommandSource>
         PosCommand.register(dispatcher);
         RelogCommand.register(dispatcher);
         RenderCommand.register(dispatcher);
+        ReplyCommand.register(dispatcher);
         ShrugCommand.register(dispatcher);
         SignSearchCommand.register(dispatcher);
         SnakeCommand.register(dispatcher);

src/main/java/net/earthcomputer/clientcommands/command/ReplyCommand.java

@@ -0,0 +1,55 @@
+package net.earthcomputer.clientcommands.command;
+
+import com.mojang.brigadier.Command;
+import com.mojang.brigadier.CommandDispatcher;
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import com.mojang.brigadier.exceptions.SimpleCommandExceptionType;
+import com.mojang.brigadier.exceptions.Dyanmic2CommandExceptionType;
+import net.fabricmc.fabric.api.client.command.v2.FabricClientCommandSource;
+import net.minecraft.network.chat.Component;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import static dev.xpple.clientarguments.arguments.CMessageArgument.*;
+import static net.fabricmc.fabric.api.client.command.v2.ClientCommandManager.*;
+
+public class ReplyCommand {
+    private static final SimpleCommandExceptionType NO_TARGET_FOUND_EXCEPTION = new SimpleCommandExceptionType(Component.translatable("commands.creply.noTargetFound"));
+    private static final Dyanmic2ExceptionType MESSAGE_TOO_LONG_EXCEPTION = new Dyanmic2CommandExceptionType((a, b) -> Component.translatable("commands.creply.messageTooLong", a, b));
+
+    @Nullable
+    private static String mostRecentWhisper = null;
+    @Nullable
+    private static String currentTarget = null;
+
+    public static void onChatOpened() {
+        currentTarget = mostRecentWhisper;
+    }
+
+    public static void setMostRecentWhisper(@NotNull String username) {
+        mostRecentWhisper = username;
+    }
+
+    public static void register(CommandDispatcher<FabricClientCommandSource> dispatcher) {
+        var command = dispatcher.register(literal("creply")
+            .then(argument("message", message())
+                .executes(ctx -> reply(ctx.getSource(), getMessage(ctx, "message")))));
+        dispatcher.register(literal("cr").redirect(command));
+    }
+
+    public static int reply(FabricClientCommandSource source, Component message) throws CommandSyntaxException {
+        if (currentTarget == null) {
+            throw NO_TARGET_FOUND_EXCEPTION.create();
+        }
+
+    String text = message.getString();
+
+    if (3 + currentTarget.length() + 1 + text.length() > 256) {
+        throw MESSAGE_TOO_LONG_EXCEPTION.create(256 - (3 + currentTarget.length() + 1), text.length());
+    }
+
+        source.getClient().getConnection().sendCommand(String.format("w %s %s", currentTarget, text));
+
+        return Command.SINGLE_SUCCESS;
+    }
+}

src/main/java/net/earthcomputer/clientcommands/mixin/commands/reply/ChatScreenMixin.java

@@ -0,0 +1,16 @@
+package net.earthcomputer.clientcommands.mixin.commands.reply;
+
+import net.earthcomputer.clientcommands.command.ReplyCommand;
+import net.minecraft.client.gui.screens.ChatScreen;
+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 class ChatScreenMixin {
+    @Inject(method = "init", at = @At("TAIL"))
+    private void onInit(CallbackInfo ci) {
+        ReplyCommand.onChatOpened();
+    }
+}

src/main/java/net/earthcomputer/clientcommands/mixin/commands/reply/ClientPacketListenerMixin.java

@@ -0,0 +1,30 @@
+package net.earthcomputer.clientcommands.mixin.commands.reply;
+
+import net.earthcomputer.clientcommands.command.ReplyCommand;
+import net.minecraft.client.multiplayer.ClientPacketListener;
+import net.minecraft.client.multiplayer.PlayerInfo;
+import net.minecraft.network.chat.ChatType;
+import net.minecraft.network.protocol.game.ClientboundPlayerChatPacket;
+import org.jetbrains.annotations.Nullable;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.util.UUID;
+
+@Mixin(ClientPacketListener.class)
+public abstract class ClientPacketListenerMixin {
+    @Shadow public abstract @Nullable PlayerInfo getPlayerInfo(UUID uniqueId);
+
+    @Inject(method = "handlePlayerChat", at = @At(value = "INVOKE", target = "Lnet/minecraft/network/protocol/PacketUtils;ensureRunningOnSameThread(Lnet/minecraft/network/protocol/Packet;Lnet/minecraft/network/PacketListener;Lnet/minecraft/util/thread/BlockableEventLoop;)V", shift = At.Shift.AFTER))
+    private void onHandlePlayerChat(ClientboundPlayerChatPacket packet, CallbackInfo ci) {
+        if (packet.chatType().chatType().is(ChatType.MSG_COMMAND_INCOMING) || packet.chatType().chatType().is(ChatType.MSG_COMMAND_OUTGOING)) {
+            PlayerInfo info = getPlayerInfo(packet.sender());
+            if (info != null) {
+                ReplyCommand.setMostRecentWhisper(info.getProfile().getName());
+            }
+        }
+    }
+}

src/main/resources/assets/clientcommands/lang/en_us.json

@@ -189,6 +189,9 @@
 
   "commands.crender.entities.success": "Entity rendering rules have been updated",
 
+  "commands.creply.noTargetFound": "Could not find a target to reply to",
+  "commands.creply.messageTooLong": "Your reply was too long (maximum: %d, given: %d)",
+
   "commands.csignsearch.starting": "Searching signs",
 
   "commands.cstartup.add.success": "Added command to startup file",

src/main/resources/mixins.clientcommands.json

@@ -65,7 +65,9 @@
     "commands.alias.ClientSuggestionProviderMixin",
     "commands.enchant.MultiPlayerGameModeMixin",
     "commands.findblock.ClientLevelMixin",
+    "commands.reply.ClientPacketListenerMixin",
     "commands.generic.CommandSuggestionsMixin",
+    "commands.reply.ChatScreenMixin",
     "dataqueryhandler.ClientPacketListenerMixin",
     "events.ClientPacketListenerMixin",
     "lengthextender.ChatScreenMixin",