From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 17 Jun 2016 20:50:11 -0400
Subject: [PATCH] Fix Old Sign Conversion

1) Sign loading code was trying to parse the JSON before the check for oldSign.
   That code could then skip the old sign converting code if it triggers a JSON parse exception.
2) New Mojang Schematic system has Tile Entities in the new converted format, but missing the Bukkit.isConverted flag
   This causes Igloos and such to render broken signs. We fix this by ignoring sign conversion for Defined Structures

diff --git a/src/main/java/net/minecraft/world/level/block/entity/TileEntity.java b/src/main/java/net/minecraft/world/level/block/entity/TileEntity.java
index 58789a6e285c31947508deae37caefe7e182278c..9b44ca96669ce423e5649f11743226dfdd9ce746 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/TileEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/TileEntity.java
@@ -34,6 +34,7 @@ public abstract class TileEntity implements net.minecraft.server.KeyedObject { /
     public CraftPersistentDataContainer persistentDataContainer;
     // CraftBukkit end
     private static final Logger LOGGER = LogManager.getLogger();
+    public boolean isLoadingStructure = false; // Paper
     private final TileEntityTypes<?> tileType; public TileEntityTypes getTileEntityType() { return tileType; } // Paper - OBFHELPER
     @Nullable
     protected World world;
diff --git a/src/main/java/net/minecraft/world/level/block/entity/TileEntitySign.java b/src/main/java/net/minecraft/world/level/block/entity/TileEntitySign.java
index 29db550d91cf9e5a23052772df6e482a5e2b0b90..ec550aaa4e7943af4ecdd2275f1f32c21edf770a 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/TileEntitySign.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/TileEntitySign.java
@@ -78,13 +78,14 @@ public class TileEntitySign extends TileEntity implements ICommandListener { //
             }
 
             try {
-                IChatMutableComponent ichatmutablecomponent = IChatBaseComponent.ChatSerializer.a(s.isEmpty() ? "\"\"" : s);
+                //IChatMutableComponent ichatmutablecomponent = IChatBaseComponent.ChatSerializer.a(s.isEmpty() ? "\"\"" : s); // Paper - move down - the old format might throw a json error
 
-                if (oldSign) {
+                if (oldSign && !isLoadingStructure) { // Paper - saved structures will be in the new format, but will not have isConverted
                     lines[i] = org.bukkit.craftbukkit.util.CraftChatMessage.fromString(s)[0];
                     continue;
                 }
                 // CraftBukkit end
+                IChatMutableComponent ichatmutablecomponent = IChatBaseComponent.ChatSerializer.a(s.isEmpty() ? "\"\"" : s); // Paper - after old sign
 
                 if (this.world instanceof WorldServer) {
                     try {
diff --git a/src/main/java/net/minecraft/world/level/levelgen/structure/templatesystem/DefinedStructure.java b/src/main/java/net/minecraft/world/level/levelgen/structure/templatesystem/DefinedStructure.java
index a2bc771df054923a9a96c0024a426ef707624359..9b82ff37faaafc3a799413f6949fb88a993aa9a0 100644
--- a/src/main/java/net/minecraft/world/level/levelgen/structure/templatesystem/DefinedStructure.java
+++ b/src/main/java/net/minecraft/world/level/levelgen/structure/templatesystem/DefinedStructure.java
@@ -278,9 +278,11 @@ public class DefinedStructure {
                                         definedstructure_blockinfo.c.setLong("LootTableSeed", random.nextLong());
                                     }
 
+                                    tileentity.isLoadingStructure = true; // Paper
                                     tileentity.load(definedstructure_blockinfo.b, definedstructure_blockinfo.c);
                                     tileentity.a(definedstructureinfo.c());
                                     tileentity.a(definedstructureinfo.d());
+                                    tileentity.isLoadingStructure = false; // Paper
                                 }
                             }