Added mixin mode to receive chat.

Author: NoMathExpectation

src/main/java/NoMathExpectation/chatExchange/neoForged/mixin/ServerGamePacketListenerImplMixin.java

@@ -0,0 +1,45 @@
+package NoMathExpectation.chatExchange.neoForged.mixin;
+
+import NoMathExpectation.chatExchange.neoForged.*;
+import net.minecraft.network.protocol.game.ServerGamePacketListener;
+import net.minecraft.network.protocol.game.ServerboundChatPacket;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.server.network.ServerGamePacketListenerImpl;
+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.ModifyVariable;
+
+@Mixin(ServerGamePacketListenerImpl.class)
+public abstract class ServerGamePacketListenerImplMixin implements ServerGamePacketListener {
+    @Shadow
+    public ServerPlayer player;
+
+    @ModifyVariable(
+            method = "handleChat(Lnet/minecraft/network/protocol/game/ServerboundChatPacket;)V",
+            at = @At("HEAD"),
+            ordinal = 0,
+            argsOnly = true
+    )
+    private ServerboundChatPacket onHandleChat(ServerboundChatPacket packet) {
+        if (!ChatExchangeConfig.INSTANCE.getMixinMode().get()) {
+            return packet;
+        }
+
+        var data = ChatExchangeDataKt.getChatExchangeData(player.server);
+        var string = packet.message();
+        if ((!ChatExchangeConfig.INSTANCE.getChat().get() || data.isIgnoredPlayer(player.getUUID())) && !ExchangeServerKt.startsWithBroadcastPrefix(string)) {
+            return packet;
+        }
+
+        var newString = ExchangeServerKt.removeBroadcastPrefix(string);
+        ExchangeServer.Companion.sendEvent(
+                new MessageEvent(
+                        ExchangeServer.Companion.componentToString(player.getName()),
+                        newString
+                )
+        );
+
+        return new ServerboundChatPacket(newString, packet.timeStamp(), packet.salt(), packet.signature(), packet.lastSeenMessages());
+    }
+}

src/main/kotlin/NoMathExpectation/chatExchange/neoForged/ChatExchangeConfig.kt

@@ -34,6 +34,10 @@ object ChatExchangeConfig {
         .worldRestart()
         .define("language", "")
 
+    val mixinMode = builder.comment("Whether to use mixin instead of event to listen to server chats.", "If the exchange server isn't sending server chat, try turn this on.")
+        .translation("modid.config.mixinMode")
+        .define("mixinMode", false)
+
     val ignoreBotRegex: ModConfigSpec.ConfigValue<String> = builder.comment("The regex to match and ignore the bot players.", "Leave blank to disable.")
         .translation("modid.config.ignoreBotRegex")
         .define("ignoreBotRegex", "") {

src/main/kotlin/NoMathExpectation/chatExchange/neoForged/ExchangeServer.kt

@@ -177,4 +177,16 @@ class ExchangeServer(
 }
 
 fun String.toExchangeServerTranslatedLiteral(vararg args: Any?): Component =
-    toTranslatedLiteral(*args, language = ExchangeServer.language)
+    toTranslatedLiteral(*args, language = ExchangeServer.language)
+
+fun String.startsWithBroadcastPrefix(): Boolean = startsWith("@广播") || startsWith("@broadcast") || startsWith("@bc")
+
+fun String.removeBroadcastPrefix(): String = if (startsWith("@广播")) {
+    removePrefix("@广播")
+} else if (startsWith("@broadcast")) {
+    removePrefix("@broadcast")
+} else if (startsWith("@bc")) {
+    removePrefix("@bc")
+} else {
+    this
+}.trimStart()

src/main/kotlin/NoMathExpectation/chatExchange/neoForged/NeoForgeEvents.kt

@@ -32,28 +32,21 @@ object NeoForgeEvents {
 
     @SubscribeEvent(priority = EventPriority.HIGHEST)
     fun onServerChat(event: ServerChatEvent) {
+        if (ChatExchangeConfig.mixinMode.get()) {
+            return
+        }
+
         val data = event.player.server.chatExchangeData
         var message = event.message
         val string = ExchangeServer.componentToString(message)
-        if ((!ChatExchangeConfig.chat.get() || data.isIgnoredPlayer(event.player.uuid)) && !(string.startsWith("@广播") || string.startsWith(
-                "@broadcast"
-            ) || string.startsWith("@bc"))
-        ) {
+        if ((!ChatExchangeConfig.chat.get() || data.isIgnoredPlayer(event.player.uuid)) && !string.startsWithBroadcastPrefix()) {
             return
         }
 
         val contents = message.contents
         if (contents is PlainTextContents) {
             val text = contents.text()
-            val newText = if (text.startsWith("@广播")) {
-                text.removePrefix("@广播")
-            } else if (text.startsWith("@broadcast")) {
-                text.removePrefix("@broadcast")
-            } else if (text.startsWith("@bc")) {
-                text.removePrefix("@bc")
-            } else {
-                text
-            }.trimStart()
+            val newText = text.removeBroadcastPrefix()
             val newMessage = Component.literal(newText)
                 .setStyle(message.style)
             newMessage.siblings += message.siblings

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

@@ -6,6 +6,7 @@
   "modid.config.port": "Port",
   "modid.config.token": "Token",
   "modid.config.language": "Language",
+  "modid.config.mixinMode": "Mixin Mode",
   "modid.config.ignoreBotRegex": "Ignore Bot Regex",
   "modid.config.chat": "Enable Chatting",
   "modid.config.joinLeave": "Enable Join/Leave",

src/main/resources/assets/chatexchange/lang/zh_cn.json

@@ -6,6 +6,7 @@
   "modid.config.port": "端口",
   "modid.config.token": "令牌",
   "modid.config.language": "语言",
+  "modid.config.mixinMode": "Mixin 模式",
   "modid.config.ignoreBotRegex": "忽略机器人正则",
   "modid.config.chat": "启用聊天消息",
   "modid.config.joinLeave": "启用加入/离开消息",

src/main/resources/chatexchange.mixins.json

@@ -8,6 +8,9 @@
   ],
   "client": [
   ],
+  "server": [
+    "ServerGamePacketListenerImplMixin"
+  ],
   "injectors": {
     "defaultRequire": 1
   }