From caa81e11598a014df82fe474f0dac6eaad0c4b39 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Thu, 1 Aug 2019 19:15:12 -0500
Subject: [PATCH] Add blacklist option for grindstone

---
 .../minecraft/server/ContainerGrindstone.java   | 17 +++++++++++++++++
 .../java/net/minecraft/server/ItemStack.java    |  6 ++++++
 .../java/net/pl3x/purpur/PurpurWorldConfig.java | 12 ++++++++++++
 3 files changed, 35 insertions(+)

diff --git a/src/main/java/net/minecraft/server/ContainerGrindstone.java b/src/main/java/net/minecraft/server/ContainerGrindstone.java
index ed88e208d..fcfb4abdc 100644
--- a/src/main/java/net/minecraft/server/ContainerGrindstone.java
+++ b/src/main/java/net/minecraft/server/ContainerGrindstone.java
@@ -57,12 +57,24 @@ public class ContainerGrindstone extends Container {
         this.a(new Slot(this.craftInventory, 0, 49, 19) {
             @Override
             public boolean isAllowed(ItemStack itemstack) {
+                // Purpur start
+                if (containeraccess.getWorld().purpurConfig.grindstoneBlacklistDisallowPlacement && containeraccess.getWorld().purpurConfig.grindstoneBlacklist.contains(itemstack.getId())) {
+                    getBukkitView().getTopInventory().getViewers().forEach(viewer -> ((Player) viewer).updateInventory());
+                    return false;
+                }
+                // Purpur end
                 return itemstack.e() || itemstack.getItem() == Items.ENCHANTED_BOOK || itemstack.hasEnchantments();
             }
         });
         this.a(new Slot(this.craftInventory, 1, 49, 40) {
             @Override
             public boolean isAllowed(ItemStack itemstack) {
+                // Purpur start
+                if (containeraccess.getWorld().purpurConfig.grindstoneBlacklistDisallowPlacement && containeraccess.getWorld().purpurConfig.grindstoneBlacklist.contains(itemstack.getId())) {
+                    getBukkitView().getTopInventory().getViewers().forEach(viewer -> ((Player) viewer).updateInventory());
+                    return false;
+                }
+                // Purpur end
                 return itemstack.e() || itemstack.getItem() == Items.ENCHANTED_BOOK || itemstack.hasEnchantments();
             }
         });
@@ -106,6 +118,11 @@ public class ContainerGrindstone extends Container {
             }
 
             private int e(ItemStack itemstack) {
+                // Purpur start
+                if (containeraccess.getWorld().purpurConfig.grindstoneBlacklistReturnsZeroExp && containeraccess.getWorld().purpurConfig.grindstoneBlacklist.contains(itemstack.getId())) {
+                    return 0;
+                }
+                // Purpur end
                 int j = 0;
                 Map<Enchantment, Integer> map = EnchantmentManager.a(itemstack);
                 Iterator iterator = map.entrySet().iterator();
diff --git a/src/main/java/net/minecraft/server/ItemStack.java b/src/main/java/net/minecraft/server/ItemStack.java
index 8c3bbef66..d5e0578b2 100644
--- a/src/main/java/net/minecraft/server/ItemStack.java
+++ b/src/main/java/net/minecraft/server/ItemStack.java
@@ -542,6 +542,12 @@ public final class ItemStack {
         return !this.e() ? this.doMaterialsMatch(itemstack) : !itemstack.isEmpty() && this.getItem() == itemstack.getItem();
     }
 
+    // Purpur start
+    public String getId() {
+        return IRegistry.ITEM.getKey(getItem()).toString();
+    }
+    // Purpur end
+
     public String j() {
         return this.getItem().f(this);
     }
diff --git a/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java b/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
index 5318a8e32..9c60855d6 100644
--- a/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
+++ b/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
@@ -8,6 +8,7 @@ import net.minecraft.server.MinecraftKey;
 import org.bukkit.configuration.ConfigurationSection;
 import org.spigotmc.SpigotWorldConfig;
 
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -103,6 +104,17 @@ public class PurpurWorldConfig {
         farmlandGetsMoistFromBelow = getBoolean("blocks.farmland.gets-moist-from-below", farmlandGetsMoistFromBelow);
     }
 
+    public List<String> grindstoneBlacklist = new ArrayList<>();
+    public boolean grindstoneBlacklistDisallowPlacement = true;
+    public boolean grindstoneBlacklistReturnsZeroExp = true;
+    private void grindstoneBlacklist() {
+        List<String> blacklist = getList("blocks.grindstone.blacklist.blacklisted-items", grindstoneBlacklist);
+        grindstoneBlacklistDisallowPlacement = getBoolean("blocks.grindstone.blacklist.disallow-placement", grindstoneBlacklistDisallowPlacement);
+        grindstoneBlacklistReturnsZeroExp = getBoolean("blocks.grindstone.blacklist.returns-zero-exp", grindstoneBlacklistReturnsZeroExp);
+        grindstoneBlacklist.clear();
+        grindstoneBlacklist.addAll(blacklist);
+    }
+
     public boolean signAllowColors = false;
     public boolean signRightClickEdit = false;
     private void signSettings() {
-- 
2.24.0