0020-Silk-touch-spawners.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Thu, 9 May 2019 14:27:37 -0500
Subject: [PATCH] Silk touch spawners


diff --git a/src/main/java/net/minecraft/world/item/Items.java b/src/main/java/net/minecraft/world/item/Items.java
index f692149d91b525bda6dc79d489d7496ea24037e8..7fbd4bf29bcc0795aa4b0e6d5d4bc3745bf7a1c0 100644
--- a/src/main/java/net/minecraft/world/item/Items.java
+++ b/src/main/java/net/minecraft/world/item/Items.java
@@ -316,7 +316,7 @@ public class Items {
     public static final Item PURPUR_BLOCK = registerBlock(Blocks.PURPUR_BLOCK);
     public static final Item PURPUR_PILLAR = registerBlock(Blocks.PURPUR_PILLAR);
     public static final Item PURPUR_STAIRS = registerBlock(Blocks.PURPUR_STAIRS);
-    public static final Item SPAWNER = registerBlock(Blocks.SPAWNER);
+    public static final Item SPAWNER = registerBlock(new org.purpurmc.purpur.item.SpawnerItem(Blocks.SPAWNER, new Item.Properties().rarity(Rarity.EPIC))); // Purpur
     public static final Item CHEST = registerBlock(Blocks.CHEST);
     public static final Item CRAFTING_TABLE = registerBlock(Blocks.CRAFTING_TABLE);
     public static final Item FARMLAND = registerBlock(Blocks.FARMLAND);
diff --git a/src/main/java/net/minecraft/world/level/block/SpawnerBlock.java b/src/main/java/net/minecraft/world/level/block/SpawnerBlock.java
index e8b1c44da90f60cde20cda65aba2aa1e30f89d25..1ac38424a44aa2225b9bd3fa0fbbe61b7b24875c 100644
--- a/src/main/java/net/minecraft/world/level/block/SpawnerBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/SpawnerBlock.java
@@ -42,6 +42,60 @@ public class SpawnerBlock extends BaseEntityBlock {
         return createTickerHelper(type, BlockEntityType.MOB_SPAWNER, world.isClientSide ? SpawnerBlockEntity::clientTick : SpawnerBlockEntity::serverTick);
     }
 
+    // Purpur start
+    @Override
+    public void playerDestroy(Level level, net.minecraft.world.entity.player.Player player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack stack, boolean includeDrops, boolean dropExp) {
+        if (level.purpurConfig.silkTouchEnabled && player.getBukkitEntity().hasPermission("purpur.drop.spawners") && isSilkTouch(level, stack)) {
+            java.util.Optional<net.minecraft.world.entity.EntityType<?>> type = net.minecraft.world.entity.EntityType.by(((SpawnerBlockEntity) blockEntity).getSpawner().nextSpawnData.getEntityToSpawn());
+
+            net.minecraft.world.entity.EntityType<?> entityType = type.orElse(null);
+            final net.kyori.adventure.text.Component mobName = io.papermc.paper.adventure.PaperAdventure.asAdventure(entityType == null ? Component.empty() : entityType.getDescription());
+            net.minecraft.nbt.CompoundTag display = new net.minecraft.nbt.CompoundTag();
+            net.minecraft.nbt.CompoundTag tag = new net.minecraft.nbt.CompoundTag();
+            net.minecraft.nbt.CompoundTag blockEntityTag = blockEntity.getUpdateTag();
+            blockEntityTag.remove("Delay"); // remove this tag to allow stacking duplicate spawners
+            tag.put("BlockEntityTag", blockEntityTag);
+
+            String name = level.purpurConfig.silkTouchSpawnerName;
+            if (name != null && !name.isEmpty() && !name.equals("Monster Spawner")) {
+                net.kyori.adventure.text.Component displayName = net.kyori.adventure.text.minimessage.MiniMessage.miniMessage().deserialize(name, net.kyori.adventure.text.minimessage.tag.resolver.Placeholder.component("mob", mobName));
+                if (name.startsWith("<reset>")) {
+                    displayName = displayName.decoration(net.kyori.adventure.text.format.TextDecoration.ITALIC, false);
+                }
+                display.put("Name", net.minecraft.nbt.StringTag.valueOf(io.papermc.paper.adventure.PaperAdventure.asJsonString(displayName, java.util.Locale.ROOT)));
+                tag.put("display", display);
+            }
+
+            List<String> lore = level.purpurConfig.silkTouchSpawnerLore;
+            if (lore != null && !lore.isEmpty()) {
+                net.minecraft.nbt.ListTag list = new net.minecraft.nbt.ListTag();
+                for (String line : lore) {
+                    net.kyori.adventure.text.Component lineComponent = net.kyori.adventure.text.minimessage.MiniMessage.miniMessage().deserialize(line, net.kyori.adventure.text.minimessage.tag.resolver.Placeholder.component("mob", mobName));
+                    if (line.startsWith("<reset>")) {
+                        lineComponent = lineComponent.decoration(net.kyori.adventure.text.format.TextDecoration.ITALIC, false);
+                    }
+                    list.add(net.minecraft.nbt.StringTag.valueOf(io.papermc.paper.adventure.PaperAdventure.asJsonString(lineComponent, java.util.Locale.ROOT)));
+                }
+                display.put("Lore", list);
+                tag.put("display", display);
+            }
+
+            ItemStack item = new ItemStack(Blocks.SPAWNER.asItem());
+            if (entityType != null) {
+                tag.putDouble("HideFlags", ItemStack.TooltipPart.ADDITIONAL.getMask()); // hides the "Interact with Spawn Egg" tooltip
+                item.setTag(tag);
+            }
+
+            popResource(level, pos, item);
+        }
+        super.playerDestroy(level, player, pos, state, blockEntity, stack, includeDrops, dropExp);
+    }
+
+    private boolean isSilkTouch(Level level, ItemStack stack) {
+        return stack != null && level.purpurConfig.silkTouchTools.contains(stack.getItem()) && net.minecraft.world.item.enchantment.EnchantmentHelper.getItemEnchantmentLevel(net.minecraft.world.item.enchantment.Enchantments.SILK_TOUCH, stack) >= level.purpurConfig.minimumSilkTouchSpawnerRequire;
+    }
+    // Purpur end
+
     @Override
     public void spawnAfterBreak(BlockState state, ServerLevel world, BlockPos pos, ItemStack tool, boolean dropExperience) {
         super.spawnAfterBreak(state, world, pos, tool, dropExperience);
@@ -50,6 +104,7 @@ public class SpawnerBlock extends BaseEntityBlock {
 
     @Override
     public int getExpDrop(BlockState iblockdata, ServerLevel worldserver, BlockPos blockposition, ItemStack itemstack, boolean flag) {
+        if (isSilkTouch(worldserver, itemstack)) return 0; // Purpur
         if (flag) {
             int i = 15 + worldserver.random.nextInt(15) + worldserver.random.nextInt(15);
 
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index 70f53ccb22de2c05c9ead68f8bd29d0b69d0993f..d4bca5b5f3d10c3a04befd8c365f46433491f299 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -108,6 +108,38 @@ public class PurpurWorldConfig {
         idleTimeoutTargetPlayer = getBoolean("gameplay-mechanics.player.idle-timeout.mobs-target", idleTimeoutTargetPlayer);
     }
 
+    public boolean silkTouchEnabled = false;
+    public String silkTouchSpawnerName = "<reset><white>Monster Spawner";
+    public List<String> silkTouchSpawnerLore = new ArrayList<>();
+    public List<Item> silkTouchTools = new ArrayList<>();
+    public int minimumSilkTouchSpawnerRequire = 1;
+    private void silkTouchSettings() {
+        if (PurpurConfig.version < 21) {
+            String oldName = getString("gameplay-mechanics.silk-touch.spawner-name", silkTouchSpawnerName);
+            set("gameplay-mechanics.silk-touch.spawner-name", "<reset>" + ChatColor.toMM(oldName.replace("{mob}", "<mob>")));
+            List<String> list = new ArrayList<>();
+            getList("gameplay-mechanics.silk-touch.spawner-lore", List.of("Spawns a <mob>"))
+                    .forEach(line -> list.add("<reset>" + ChatColor.toMM(line.toString().replace("{mob}", "<mob>"))));
+            set("gameplay-mechanics.silk-touch.spawner-lore", list);
+        }
+        silkTouchEnabled = getBoolean("gameplay-mechanics.silk-touch.enabled", silkTouchEnabled);
+        silkTouchSpawnerName = getString("gameplay-mechanics.silk-touch.spawner-name", silkTouchSpawnerName);
+        minimumSilkTouchSpawnerRequire = getInt("gameplay-mechanics.silk-touch.minimal-level", minimumSilkTouchSpawnerRequire);
+        silkTouchSpawnerLore.clear();
+        getList("gameplay-mechanics.silk-touch.spawner-lore", List.of("Spawns a <mob>"))
+                .forEach(line -> silkTouchSpawnerLore.add(line.toString()));
+        silkTouchTools.clear();
+        getList("gameplay-mechanics.silk-touch.tools", List.of(
+                "minecraft:iron_pickaxe",
+                "minecraft:golden_pickaxe",
+                "minecraft:diamond_pickaxe",
+                "minecraft:netherite_pickaxe"
+        )).forEach(key -> {
+            Item item = BuiltInRegistries.ITEM.get(new ResourceLocation(key.toString()));
+            if (item != Items.AIR) silkTouchTools.add(item);
+        });
+    }
+
     public boolean babiesAreRidable = true;
     public boolean untamedTamablesAreRidable = true;
     public boolean useNightVisionWhenRiding = false;
diff --git a/src/main/java/org/purpurmc/purpur/item/SpawnerItem.java b/src/main/java/org/purpurmc/purpur/item/SpawnerItem.java
new file mode 100644
index 0000000000000000000000000000000000000000..d6cc7e434cb2bacc00e4cad9e1f4be7fcf5d0bee
--- /dev/null
+++ b/src/main/java/org/purpurmc/purpur/item/SpawnerItem.java
@@ -0,0 +1,38 @@
+package org.purpurmc.purpur.item;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.BlockItem;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.entity.SpawnerBlockEntity;
+import net.minecraft.world.level.block.state.BlockState;
+
+public class SpawnerItem extends BlockItem {
+
+    public SpawnerItem(Block block, Properties settings) {
+        super(block, settings);
+    }
+
+    @Override
+    protected boolean updateCustomBlockEntityTag(BlockPos pos, Level level, Player player, ItemStack stack, BlockState state) {
+        boolean handled = super.updateCustomBlockEntityTag(pos, level, player, stack, state);
+        if (level.purpurConfig.silkTouchEnabled && player.getBukkitEntity().hasPermission("purpur.place.spawners")) {
+            BlockEntity spawner = level.getBlockEntity(pos);
+            if (spawner instanceof SpawnerBlockEntity && stack.hasTag()) {
+                CompoundTag tag = stack.getTag();
+                if (tag.contains("Purpur.mob_type")) {
+                    EntityType.byString(tag.getString("Purpur.mob_type")).ifPresent(type ->
+                            ((SpawnerBlockEntity) spawner).getSpawner().setEntityId(type, level, level.random, pos));
+                } else if (tag.contains("BlockEntityTag")) {
+                    spawner.load(tag.getCompound("BlockEntityTag"));
+                }
+            }
+        }
+        return handled;
+    }
+}