src/main/java/net/girlonthe/chattweaks/mixin/ChatComponentMixin.java


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package net.girlonthe.chattweaks.mixin;

import net.minecraft.ChatFormatting;
import net.minecraft.client.gui.components.ChatComponent;
import net.minecraft.client.multiplayer.chat.GuiMessage;
import net.minecraft.network.chat.Component;
import net.minecraft.network.chat.Style;
import net.minecraft.network.chat.TextColor;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.ModifyArg;
import org.spongepowered.asm.mixin.Mixin;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

@Mixin(ChatComponent.class)
public abstract class ChatComponentMixin {
    @ModifyArg(
        method = "addMessage",
        at = @At(value = "INVOKE", target = "Lnet/minecraft/client/gui/components/ChatComponent;addMessageToDisplayQueue(Lnet/minecraft/client/multiplayer/chat/GuiMessage;)V")
    )
    private GuiMessage rosasChatTweaks$prependTimestamp(GuiMessage original) {
        Component newComponent = Component.empty()
            .append(
                Component.literal(DateTimeFormatter.ofPattern("HH:mm:ss ").format(LocalDateTime.now()))
                    .setStyle(Style.EMPTY.withColor(ChatFormatting.GRAY))
            )
            .append(original.content());
        return new GuiMessage(original.addedTime(), newComponent, original.signature(), original.source(), original.tag());
    }
}