From fa6b729b6e02c8a23860d995a3c9e8c4bfb769f7 Mon Sep 17 00:00:00 2001
From: CatMoe <exusiaimoe@protonmail.com>
Date: Wed, 13 Apr 2022 06:31:36 +0000
Subject: [PATCH] Implement sign marker for fabric 1.16

---
 .../dynmap/fabric_1_16_4/FabricServer.java    |  5 +++
 .../fabric_1_16_4/event/BlockEvents.java      | 17 +++++++++
 .../mixin/ServerPlayNetworkHandlerMixin.java  | 36 +++++++++++++++++++
 3 files changed, 58 insertions(+)

diff --git a/fabric-1.16.4/src/main/java/org/dynmap/fabric_1_16_4/FabricServer.java b/fabric-1.16.4/src/main/java/org/dynmap/fabric_1_16_4/FabricServer.java
index 9c0844f3..1a4e1ef3 100644
--- a/fabric-1.16.4/src/main/java/org/dynmap/fabric_1_16_4/FabricServer.java
+++ b/fabric-1.16.4/src/main/java/org/dynmap/fabric_1_16_4/FabricServer.java
@@ -27,6 +27,7 @@ import org.dynmap.common.DynmapListenerManager;
 import org.dynmap.common.DynmapPlayer;
 import org.dynmap.common.DynmapServerInterface;
 import org.dynmap.fabric_1_16_4.event.ServerChatEvents;
+import org.dynmap.fabric_1_16_4.event.BlockEvents;
 import org.dynmap.utils.MapChunkCache;
 import org.dynmap.utils.VisibilityLimit;
 
@@ -283,6 +284,10 @@ public class FabricServer extends DynmapServerInterface {
                     }
                 }, DynmapPlugin.this);
                 */
+                BlockEvents.SIGN_CHANGE_EVENT.register((world, pos, lines, material, player) -> {
+                    plugin.core.processSignChange("fabric", FabricWorld.getWorldName(plugin, world),
+                            pos.getX(), pos.getY(), pos.getZ(), lines, player.getName().asString());
+                });
                 break;
 
             default:
diff --git a/fabric-1.16.4/src/main/java/org/dynmap/fabric_1_16_4/event/BlockEvents.java b/fabric-1.16.4/src/main/java/org/dynmap/fabric_1_16_4/event/BlockEvents.java
index 564f2587..b937f894 100644
--- a/fabric-1.16.4/src/main/java/org/dynmap/fabric_1_16_4/event/BlockEvents.java
+++ b/fabric-1.16.4/src/main/java/org/dynmap/fabric_1_16_4/event/BlockEvents.java
@@ -5,6 +5,11 @@ import net.fabricmc.fabric.api.event.EventFactory;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.block.Material;
+import net.minecraft.server.network.ServerPlayerEntity;
+
 public class BlockEvents {
     private BlockEvents() {
     }
@@ -17,7 +22,19 @@ public class BlockEvents {
             }
     );
 
+    public static Event<SignChangeCallback> SIGN_CHANGE_EVENT = EventFactory.createArrayBacked(SignChangeCallback.class,
+            (listeners) -> (world, pos, lines, material, player) -> {
+                for (SignChangeCallback callback : listeners) {
+                    callback.onSignChange(world, pos, lines, material, player);
+                }
+            }
+    );
+
     public interface BlockCallback {
         void onBlockEvent(World world, BlockPos pos);
     }
+
+    public interface SignChangeCallback {
+        void onSignChange(ServerWorld world, BlockPos pos, String[] lines, Material material, ServerPlayerEntity player);
+    }
 }
diff --git a/fabric-1.16.4/src/main/java/org/dynmap/fabric_1_16_4/mixin/ServerPlayNetworkHandlerMixin.java b/fabric-1.16.4/src/main/java/org/dynmap/fabric_1_16_4/mixin/ServerPlayNetworkHandlerMixin.java
index d103962b..d838d9b7 100644
--- a/fabric-1.16.4/src/main/java/org/dynmap/fabric_1_16_4/mixin/ServerPlayNetworkHandlerMixin.java
+++ b/fabric-1.16.4/src/main/java/org/dynmap/fabric_1_16_4/mixin/ServerPlayNetworkHandlerMixin.java
@@ -2,12 +2,23 @@ package org.dynmap.fabric_1_16_4.mixin;
 
 import net.minecraft.server.network.ServerPlayNetworkHandler;
 import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.block.entity.SignBlockEntity;
+import net.minecraft.network.packet.c2s.play.UpdateSignC2SPacket;
+import net.minecraft.text.LiteralText;
 import org.dynmap.fabric_1_16_4.event.ServerChatEvents;
+import org.dynmap.fabric_1_16_4.event.BlockEvents;
 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 org.spongepowered.asm.mixin.injection.callback.LocalCapture;
+
+import java.util.List;
 
 @Mixin(ServerPlayNetworkHandler.class)
 public abstract class ServerPlayNetworkHandlerMixin {
@@ -25,4 +36,29 @@ public abstract class ServerPlayNetworkHandlerMixin {
     public void onGameMessage(String string, CallbackInfo info) {
         ServerChatEvents.EVENT.invoker().onChatMessage(player, string);
     }
+
+        @Inject(
+            method = "method_31282",
+            at = @At(
+                    value = "INVOKE",
+                    target = "Lnet/minecraft/block/entity/SignBlockEntity;markDirty()V",
+                    shift = At.Shift.BEFORE
+            ),
+            locals = LocalCapture.CAPTURE_FAILHARD
+    )
+    public void onSignUpdate(UpdateSignC2SPacket packet, List<String> signText, CallbackInfo info,
+            ServerWorld serverWorld, BlockPos blockPos, BlockState blockState, BlockEntity blockEntity, SignBlockEntity signBlockEntity)
+    {
+        // Pull the raw text from the input.
+        String[] rawTexts = new String[4];
+        for (int i=0; i<signText.size(); i++)
+            rawTexts[i] = signText.get(i);
+
+        // Fire the event.
+        BlockEvents.SIGN_CHANGE_EVENT.invoker().onSignChange(serverWorld, blockPos, rawTexts, blockState.getMaterial(), player);
+
+        // Put the (possibly updated) texts in the sign. Ignore filtering (is this OK?).
+        for (int i=0; i<signText.size(); i++)
+            signBlockEntity.setTextOnRow(i, new LiteralText(rawTexts[i]));
+    }
 }