From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: violetc <58360096+s-yh-china@users.noreply.github.com>
Date: Fri, 7 Jul 2023 16:50:06 +0800
Subject: [PATCH] Bladeren Protocol


diff --git a/src/main/java/org/leavesmc/leaves/protocol/bladeren/BladerenProtocol.java b/src/main/java/org/leavesmc/leaves/protocol/bladeren/BladerenProtocol.java
new file mode 100644
index 0000000000000000000000000000000000000000..318a1a42c43688cc2711c3b902e7302e26c9a83e
--- /dev/null
+++ b/src/main/java/org/leavesmc/leaves/protocol/bladeren/BladerenProtocol.java
@@ -0,0 +1,150 @@
+package org.leavesmc.leaves.protocol.bladeren;
+
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.server.level.ServerPlayer;
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
+import org.leavesmc.leaves.LeavesConfig;
+import org.leavesmc.leaves.LeavesLogger;
+import org.leavesmc.leaves.protocol.core.LeavesCustomPayload;
+import org.leavesmc.leaves.protocol.core.LeavesProtocol;
+import org.leavesmc.leaves.protocol.core.ProtocolHandler;
+import org.leavesmc.leaves.protocol.core.ProtocolUtils;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.BiConsumer;
+
+@LeavesProtocol(namespace = "bladeren")
+public class BladerenProtocol {
+
+    public static final String PROTOCOL_ID = "bladeren";
+    public static final String PROTOCOL_VERSION = ProtocolUtils.buildProtocolVersion(PROTOCOL_ID);
+
+    private static final ResourceLocation HELLO_ID = id("hello");
+    private static final ResourceLocation FEATURE_MODIFY_ID = id("feature_modify");
+
+    private static final Map<String, BiConsumer<ServerPlayer, CompoundTag>> registeredFeatures = new HashMap<>();
+
+    @Contract("_ -> new")
+    public static @NotNull ResourceLocation id(String path) {
+        return new ResourceLocation(PROTOCOL_ID, path);
+    }
+
+    @ProtocolHandler.PayloadReceiver(payload = BladerenHelloPayload.class, payloadId = "hello")
+    private static void handleHello(@NotNull ServerPlayer player, @NotNull BladerenHelloPayload payload) {
+        if (LeavesConfig.bladerenLeavesProtocol) {
+            String clientVersion = payload.version;
+            CompoundTag tag = payload.nbt;
+
+            LeavesLogger.LOGGER.info("Player " + player.getScoreboardName() + " joined with bladeren " + clientVersion);
+
+            if (tag != null) {
+                CompoundTag featureNbt = tag.getCompound("Features");
+                for (String name : featureNbt.getAllKeys()) {
+                    if (registeredFeatures.containsKey(name)) {
+                        registeredFeatures.get(name).accept(player, featureNbt.getCompound(name));
+                    }
+                }
+            }
+        }
+    }
+
+    @ProtocolHandler.PayloadReceiver(payload = BladerenFeatureModifyPayload.class, payloadId = "feature_modify")
+    private static void handleModify(@NotNull ServerPlayer player, @NotNull BladerenFeatureModifyPayload payload) {
+        if (LeavesConfig.bladerenLeavesProtocol) {
+            String name = payload.name;
+            CompoundTag tag = payload.nbt;
+
+            if (registeredFeatures.containsKey(name)) {
+                registeredFeatures.get(name).accept(player, tag);
+            }
+        }
+    }
+
+    @ProtocolHandler.PlayerJoin
+    public static void onPlayerJoin(@NotNull ServerPlayer player) {
+        if (LeavesConfig.bladerenLeavesProtocol) {
+            CompoundTag tag = new CompoundTag();
+            LeavesFeatureSet.writeNBT(tag);
+            ProtocolUtils.sendPayloadPacket(player, new BladerenHelloPayload(PROTOCOL_VERSION, tag));
+        }
+    }
+
+    public static void registerFeature(String name, BiConsumer<ServerPlayer, CompoundTag> consumer) {
+        registeredFeatures.put(name, consumer);
+    }
+
+    public static class LeavesFeatureSet {
+
+        private static final Map<String, LeavesFeature> features = new HashMap<>();
+
+        public static void writeNBT(@NotNull CompoundTag tag) {
+            CompoundTag featureNbt = new CompoundTag();
+            features.values().forEach(feature -> feature.writeNBT(featureNbt));
+            tag.put("Features", featureNbt);
+        }
+
+        public static void register(LeavesFeature feature) {
+            features.put(feature.name, feature);
+        }
+    }
+
+    public record LeavesFeature(String name, String value) {
+
+        @NotNull
+        @Contract("_, _ -> new")
+        public static LeavesFeature of(String name, boolean value) {
+            return new LeavesFeature(name, Boolean.toString(value));
+        }
+
+        public void writeNBT(@NotNull CompoundTag rules) {
+            CompoundTag rule = new CompoundTag();
+            rule.putString("Feature", name);
+            rule.putString("Value", value);
+            rules.put(name, rule);
+        }
+    }
+
+    public record BladerenFeatureModifyPayload(String name, CompoundTag nbt) implements LeavesCustomPayload<BladerenFeatureModifyPayload> {
+
+        @New
+        public BladerenFeatureModifyPayload(ResourceLocation location, FriendlyByteBuf buf) {
+            this(buf.readUtf(), buf.readNbt());
+        }
+
+        @Override
+        public void write(@NotNull FriendlyByteBuf buf) {
+            buf.writeUtf(name);
+            buf.writeNbt(nbt);
+        }
+
+        @Override
+        @NotNull
+        public ResourceLocation id() {
+            return FEATURE_MODIFY_ID;
+        }
+    }
+
+    public record BladerenHelloPayload(String version, CompoundTag nbt) implements LeavesCustomPayload<BladerenHelloPayload> {
+
+        @New
+        public BladerenHelloPayload(ResourceLocation location, @NotNull FriendlyByteBuf buf) {
+            this(buf.readUtf(64), buf.readNbt());
+        }
+
+        @Override
+        public void write(@NotNull FriendlyByteBuf buf) {
+            buf.writeUtf(version);
+            buf.writeNbt(nbt);
+        }
+
+        @Override
+        @NotNull
+        public ResourceLocation id() {
+            return HELLO_ID;
+        }
+    }
+}