[WIP] Add mod api

src/main/java/moe/nea/firmament/mixins/CustomPayloadEventDispatcher.java

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+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.mixins;
+
+import moe.nea.firmament.apis.ingame.FirmamentCustomPayload;
+import moe.nea.firmament.events.FirmamentCustomPayloadEvent;
+import net.minecraft.client.network.ClientPlayNetworkHandler;
+import net.minecraft.network.packet.CustomPayload;
+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(ClientPlayNetworkHandler.class)
+public class CustomPayloadEventDispatcher {
+    @Inject(method = "onCustomPayload", at = @At("HEAD"), cancellable = true)
+    private void handleFirmamentParsedPayload(CustomPayload payload, CallbackInfo ci) {
+        if (payload instanceof FirmamentCustomPayload customPayload) {
+            FirmamentCustomPayloadEvent.Companion.publish(new FirmamentCustomPayloadEvent(customPayload));
+            ci.cancel();
+        }
+    }
+}

src/main/java/moe/nea/firmament/mixins/WrapCustomPayloadC2SPacketCodec.java

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+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.mixins;
+
+import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
+import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
+import moe.nea.firmament.apis.ingame.InGameCodecWrapper;
+import net.minecraft.network.PacketByteBuf;
+import net.minecraft.network.codec.PacketCodec;
+import net.minecraft.network.packet.CustomPayload;
+import net.minecraft.network.packet.c2s.common.CustomPayloadC2SPacket;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+
+import java.util.List;
+
+@Mixin(priority = 1001, value = CustomPayloadC2SPacket.class)
+public class WrapCustomPayloadC2SPacketCodec {
+
+    @WrapOperation(method = "<clinit>", at = @At(value = "INVOKE", target = "Lnet/minecraft/network/packet/CustomPayload;createCodec(Lnet/minecraft/network/packet/CustomPayload$CodecFactory;Ljava/util/List;)Lnet/minecraft/network/codec/PacketCodec;"))
+    private static PacketCodec<PacketByteBuf, CustomPayload> wrapFactory(
+        CustomPayload.CodecFactory<PacketByteBuf> unknownCodecFactory,
+        List<CustomPayload.Type<PacketByteBuf, ?>> types,
+        Operation<PacketCodec<PacketByteBuf, CustomPayload>> original) {
+
+        var originalCodec = original.call(unknownCodecFactory, types);
+
+        return new InGameCodecWrapper(originalCodec, InGameCodecWrapper.Direction.C2S);
+    }
+}

src/main/java/moe/nea/firmament/mixins/WrapCustomPayloadS2CPacketCodec.java

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+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.mixins;
+
+import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
+import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
+import moe.nea.firmament.apis.ingame.InGameCodecWrapper;
+import moe.nea.firmament.apis.ingame.JoinedCustomPayload;
+import net.minecraft.network.PacketByteBuf;
+import net.minecraft.network.codec.PacketCodec;
+import net.minecraft.network.listener.ClientCommonPacketListener;
+import net.minecraft.network.packet.CustomPayload;
+import net.minecraft.network.packet.s2c.common.CustomPayloadS2CPacket;
+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.List;
+
+@Mixin(priority = 1001, value = CustomPayloadS2CPacket.class)
+public abstract class WrapCustomPayloadS2CPacketCodec {
+
+    @Shadow
+    public abstract CustomPayload payload();
+
+    @WrapOperation(method = "<clinit>", at = @At(value = "INVOKE", target = "Lnet/minecraft/network/packet/CustomPayload;createCodec(Lnet/minecraft/network/packet/CustomPayload$CodecFactory;Ljava/util/List;)Lnet/minecraft/network/codec/PacketCodec;"))
+    private static PacketCodec<PacketByteBuf, CustomPayload> wrapFactory(
+        CustomPayload.CodecFactory<PacketByteBuf> unknownCodecFactory,
+        List<CustomPayload.Type<PacketByteBuf, ?>> types,
+        Operation<PacketCodec<PacketByteBuf, CustomPayload>> original) {
+
+        var originalCodec = original.call(unknownCodecFactory, types);
+
+        return new InGameCodecWrapper(originalCodec, InGameCodecWrapper.Direction.S2C);
+    }
+
+
+    // TODO: move to own class
+    @Inject(method = "apply(Lnet/minecraft/network/listener/ClientCommonPacketListener;)V", at = @At("HEAD"), cancellable = true)
+    private void onApply(ClientCommonPacketListener clientCommonPacketListener, CallbackInfo ci) {
+        if (payload() instanceof JoinedCustomPayload joinedCustomPayload) {
+            new CustomPayloadS2CPacket(joinedCustomPayload.getOriginal()).apply(clientCommonPacketListener);
+            new CustomPayloadS2CPacket(joinedCustomPayload.getSmuggled()).apply(clientCommonPacketListener);
+            ci.cancel();
+        }
+    }
+
+
+}

src/main/java/moe/nea/firmament/mixins/devenv/WarnForUnknownCustomPayloadSends.java

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+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.mixins.devenv;
+
+import moe.nea.firmament.Firmament;
+import net.minecraft.network.PacketByteBuf;
+import net.minecraft.network.packet.UnknownCustomPayload;
+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(UnknownCustomPayload.class)
+public class WarnForUnknownCustomPayloadSends {
+    @Inject(method = "method_56493", at = @At("HEAD"))
+    private static void warn(UnknownCustomPayload value, PacketByteBuf buf, CallbackInfo ci) {
+        Firmament.INSTANCE.getLogger().warn("Unknown custom payload is being sent: {}", value);
+    }
+}