From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Ben Kerllenevich <ben@omega24.dev>
Date: Sat, 25 Jun 2022 08:04:06 -0400
Subject: [PATCH] Enchantment Table Persists Lapis


diff --git a/src/main/java/net/minecraft/world/inventory/EnchantmentMenu.java b/src/main/java/net/minecraft/world/inventory/EnchantmentMenu.java
index 5b3e33807e0e13480e3359c0cf067719e5749237..c3a644b0f8c7c5622acc9e1a496f95d432718806 100644
--- a/src/main/java/net/minecraft/world/inventory/EnchantmentMenu.java
+++ b/src/main/java/net/minecraft/world/inventory/EnchantmentMenu.java
@@ -38,6 +38,12 @@ import org.bukkit.event.enchantment.PrepareItemEnchantEvent;
 import org.bukkit.entity.Player;
 // CraftBukkit end
 
+// Purpur start
+import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.entity.EnchantingTableBlockEntity;
+import org.bukkit.craftbukkit.entity.CraftHumanEntity;
+// Purpur end
+
 public class EnchantmentMenu extends AbstractContainerMenu {
 
     static final ResourceLocation EMPTY_SLOT_LAPIS_LAZULI = new ResourceLocation("item/empty_slot_lapis_lazuli");
@@ -72,6 +78,22 @@ public class EnchantmentMenu extends AbstractContainerMenu {
                 return context.getLocation();
             }
             // CraftBukkit end
+
+            // Purpur start
+            @Override
+            public void onClose(CraftHumanEntity who) {
+                super.onClose(who);
+
+                if (who.getHandle().level().purpurConfig.enchantmentTableLapisPersists) {
+                    access.execute((level, pos) -> {
+                        BlockEntity blockEntity = level.getBlockEntity(pos);
+                        if (blockEntity instanceof EnchantingTableBlockEntity enchantmentTable) {
+                            enchantmentTable.setLapis(this.getItem(1).getCount());
+                        }
+                    });
+                }
+            }
+            // Purpur end
         };
         this.random = RandomSource.create();
         this.enchantmentSeed = DataSlot.standalone();
@@ -97,6 +119,17 @@ public class EnchantmentMenu extends AbstractContainerMenu {
             }
         });
 
+        // Purpur start
+        access.execute((level, pos) -> {
+            if (level.purpurConfig.enchantmentTableLapisPersists) {
+                BlockEntity blockEntity = level.getBlockEntity(pos);
+                if (blockEntity instanceof EnchantingTableBlockEntity enchantmentTable) {
+                    this.getSlot(1).set(new ItemStack(Items.LAPIS_LAZULI, enchantmentTable.getLapis()));
+                }
+            }
+        });
+        // Purpur end
+
         int j;
 
         for (j = 0; j < 3; ++j) {
@@ -332,6 +365,7 @@ public class EnchantmentMenu extends AbstractContainerMenu {
     public void removed(net.minecraft.world.entity.player.Player player) {
         super.removed(player);
         this.access.execute((world, blockposition) -> {
+            if (world.purpurConfig.enchantmentTableLapisPersists) this.getSlot(1).set(ItemStack.EMPTY); // Purpur
             this.clearContainer(player, this.enchantSlots);
         });
     }
diff --git a/src/main/java/net/minecraft/world/level/block/EnchantingTableBlock.java b/src/main/java/net/minecraft/world/level/block/EnchantingTableBlock.java
index 151e856dda3aa262c846ce8793650ee582bfb749..be0ed8a14e5726d5fcea1864302b18fb75fde2b4 100644
--- a/src/main/java/net/minecraft/world/level/block/EnchantingTableBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/EnchantingTableBlock.java
@@ -124,4 +124,18 @@ public class EnchantingTableBlock extends BaseEntityBlock {
     protected boolean isPathfindable(BlockState state, PathComputationType type) {
         return false;
     }
+
+    // Purpur start
+    @Override
+    public void onRemove(BlockState state, Level level, BlockPos pos, BlockState newState, boolean moved) {
+        BlockEntity blockEntity = level.getBlockEntity(pos);
+
+        if (level.purpurConfig.enchantmentTableLapisPersists && blockEntity instanceof EnchantingTableBlockEntity enchantmentTable) {
+            net.minecraft.world.Containers.dropItemStack(level, pos.getX(), pos.getY(), pos.getZ(), new net.minecraft.world.item.ItemStack(net.minecraft.world.item.Items.LAPIS_LAZULI, enchantmentTable.getLapis()));
+            level.updateNeighbourForOutputSignal(pos, this);
+        }
+
+        super.onRemove(state, level, pos, newState, moved);
+    }
+    // Purpur end
 }
diff --git a/src/main/java/net/minecraft/world/level/block/entity/EnchantingTableBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/EnchantingTableBlockEntity.java
index d47bc2f54c4722a0b8c419b99ee57eb3cb25d750..fdeabdcc781b605d6f3ee18528fd380ffff95660 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/EnchantingTableBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/EnchantingTableBlockEntity.java
@@ -28,6 +28,7 @@ public class EnchantingTableBlockEntity extends BlockEntity implements Nameable
     private static final RandomSource RANDOM = RandomSource.create();
     @Nullable
     private Component name;
+    private int lapis = 0; // Purpur
 
     public EnchantingTableBlockEntity(BlockPos pos, BlockState state) {
         super(BlockEntityType.ENCHANTING_TABLE, pos, state);
@@ -39,6 +40,7 @@ public class EnchantingTableBlockEntity extends BlockEntity implements Nameable
         if (this.hasCustomName()) {
             nbt.putString("CustomName", Component.Serializer.toJson(this.name, registryLookup));
         }
+        nbt.putInt("Purpur.Lapis", this.lapis); // Purpur
     }
 
     @Override
@@ -47,6 +49,7 @@ public class EnchantingTableBlockEntity extends BlockEntity implements Nameable
         if (nbt.contains("CustomName", 8)) {
             this.name = parseCustomNameSafe(nbt.getString("CustomName"), registryLookup);
         }
+        this.lapis = nbt.getInt("Purpur.Lapis"); // Purpur
     }
 
     public static void bookAnimationTick(Level world, BlockPos pos, BlockState state, EnchantingTableBlockEntity blockEntity) {
@@ -138,4 +141,14 @@ public class EnchantingTableBlockEntity extends BlockEntity implements Nameable
     public void removeComponentsFromTag(CompoundTag nbt) {
         nbt.remove("CustomName");
     }
+
+    // Purpur start
+    public int getLapis() {
+        return this.lapis;
+    }
+
+    public void setLapis(int lapis) {
+        this.lapis = lapis;
+    }
+    // Purpur
 }
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index 3745acb6de975db70c78493907eb8784d3a10d75..71795b553145ae497c31947f5fbb03574a860767 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -1523,6 +1523,11 @@ public class PurpurWorldConfig {
         elderGuardianAlwaysDropExp = getBoolean("mobs.elder_guardian.always-drop-exp", elderGuardianAlwaysDropExp);
     }
 
+    public boolean enchantmentTableLapisPersists = false;
+    private void enchantmentTableSettings() {
+        enchantmentTableLapisPersists = getBoolean("blocks.enchantment-table.lapis-persists", enchantmentTableLapisPersists);
+    }
+
     public boolean enderDragonRidable = false;
     public boolean enderDragonRidableInWater = true;
     public boolean enderDragonControllable = true;