GoogleChat/src/main/java/io/gitlab/jfronny/googlechat/mixin/ChatMessageC2SPacketMixin.java

package io.gitlab.jfronny.googlechat.mixin;

import io.gitlab.jfronny.googlechat.GoogleChat;
import io.gitlab.jfronny.libjf.translate.api.Language;
import io.gitlab.jfronny.libjf.translate.api.TranslateService;
import net.minecraft.network.PacketByteBuf;
import net.minecraft.network.packet.c2s.play.ChatMessageC2SPacket;
import org.spongepowered.asm.mixin.Final;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.Mutable;
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;

@Mixin(ChatMessageC2SPacket.class)
public class ChatMessageC2SPacketMixin {
    @Mutable
    @Final
    @Shadow
    private String chatMessage;

    @Inject(at = @At("RETURN"), method = "<init>(Ljava/lang/String;)V")
    public void init(String chatMessage, CallbackInfo info) {
        googlechat$translate(GoogleChat.TRANSLATE_SERVICE);
    }

    @Inject(at = @At("RETURN"), method = "<init>(Lnet/minecraft/network/PacketByteBuf;)V")
    public void init(PacketByteBuf buf, CallbackInfo ci) {
        googlechat$translate(GoogleChat.TRANSLATE_SERVICE);
    }

    private <T extends Language> void googlechat$translate(TranslateService<T> ts) {
        if (chatMessage.startsWith("/")) return;
        chatMessage = GoogleChat.translateIfNeeded(chatMessage, GoogleChat.Direction.C2S, true);
        if (chatMessage.length() > 256) chatMessage = chatMessage.substring(0, 256);
    }
}