Paper/patches/unapplied/server/0722-Custom-Potion-Mixes.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Thu, 7 Oct 2021 14:34:55 -0700
Subject: [PATCH] Custom Potion Mixes


diff --git a/src/main/java/io/papermc/paper/potion/PaperPotionMix.java b/src/main/java/io/papermc/paper/potion/PaperPotionMix.java
new file mode 100644
index 0000000000000000000000000000000000000000..7ea357ac2f3a93db4ebdf24b5072be7d1cad3e33
--- /dev/null
+++ b/src/main/java/io/papermc/paper/potion/PaperPotionMix.java
@@ -0,0 +1,21 @@
+package io.papermc.paper.potion;
+
+import java.util.function.Predicate;
+import net.minecraft.world.item.ItemStack;
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.craftbukkit.inventory.CraftRecipe;
+import org.bukkit.inventory.RecipeChoice;
+
+public record PaperPotionMix(ItemStack result, Predicate<ItemStack> input, Predicate<ItemStack> ingredient) {
+
+    public PaperPotionMix(PotionMix potionMix) {
+        this(CraftItemStack.asNMSCopy(potionMix.getResult()), convert(potionMix.getInput()), convert(potionMix.getIngredient()));
+    }
+
+    static Predicate<ItemStack> convert(final RecipeChoice choice) {
+        if (choice instanceof PredicateRecipeChoice predicateRecipeChoice) {
+            return stack -> predicateRecipeChoice.test(CraftItemStack.asBukkitCopy(stack));
+        }
+        return CraftRecipe.toIngredient(choice, true);
+    }
+}
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 041ba5fd85748b3183e12e7a8e10fca77eb35bf5..88821acddee03c30c2630d3d6c39cc93702ed35b 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -2081,6 +2081,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
 
             this.worldData.setDataConfiguration(worlddataconfiguration);
             this.resources.managers.updateRegistryTags(this.registryAccess());
+            net.minecraft.world.item.alchemy.PotionBrewing.reload(); // Paper - Custom Potion Mixes
             this.getPlayerList().saveAll();
             this.getPlayerList().reloadResources();
             this.functionManager.replaceLibrary(this.resources.managers.getFunctionLibrary());
diff --git a/src/main/java/net/minecraft/world/inventory/BrewingStandMenu.java b/src/main/java/net/minecraft/world/inventory/BrewingStandMenu.java
index ad012400d76c263bf26cfa07e2e24f26dc32276b..054555c6b9c61243b1f14139b5c0eb2579403707 100644
--- a/src/main/java/net/minecraft/world/inventory/BrewingStandMenu.java
+++ b/src/main/java/net/minecraft/world/inventory/BrewingStandMenu.java
@@ -169,7 +169,7 @@ public class BrewingStandMenu extends AbstractContainerMenu {
         }
 
         public static boolean mayPlaceItem(ItemStack stack) {
-            return stack.is(Items.POTION) || stack.is(Items.SPLASH_POTION) || stack.is(Items.LINGERING_POTION) || stack.is(Items.GLASS_BOTTLE);
+            return stack.is(Items.POTION) || stack.is(Items.SPLASH_POTION) || stack.is(Items.LINGERING_POTION) || stack.is(Items.GLASS_BOTTLE) || PotionBrewing.isCustomInput(stack); // Paper - Custom Potion Mixes
         }
     }
 
diff --git a/src/main/java/net/minecraft/world/item/alchemy/PotionBrewing.java b/src/main/java/net/minecraft/world/item/alchemy/PotionBrewing.java
index a37573d06aeaa4ae05d26fa26c888524dd834421..96197185d1cba4a77bd6afd0e57615b45d4dfc85 100644
--- a/src/main/java/net/minecraft/world/item/alchemy/PotionBrewing.java
+++ b/src/main/java/net/minecraft/world/item/alchemy/PotionBrewing.java
@@ -14,6 +14,7 @@ public class PotionBrewing {
     public static final int BREWING_TIME_SECONDS = 20;
     private static final List<PotionBrewing.Mix<Potion>> POTION_MIXES = Lists.newArrayList();
     private static final List<PotionBrewing.Mix<Item>> CONTAINER_MIXES = Lists.newArrayList();
+    private static final it.unimi.dsi.fastutil.objects.Object2ObjectLinkedOpenHashMap<org.bukkit.NamespacedKey, io.papermc.paper.potion.PaperPotionMix> CUSTOM_MIXES = new it.unimi.dsi.fastutil.objects.Object2ObjectLinkedOpenHashMap<>(); // Paper - Custom Potion Mixes
     private static final List<Ingredient> ALLOWED_CONTAINERS = Lists.newArrayList();
     private static final Predicate<ItemStack> ALLOWED_CONTAINER = stack -> {
         for (Ingredient ingredient : ALLOWED_CONTAINERS) {
@@ -26,7 +27,7 @@ public class PotionBrewing {
     };
 
     public static boolean isIngredient(ItemStack stack) {
-        return isContainerIngredient(stack) || isPotionIngredient(stack);
+        return isContainerIngredient(stack) || isPotionIngredient(stack) || isCustomIngredient(stack); // Paper - Custom Potion Mixes
     }
 
     protected static boolean isContainerIngredient(ItemStack stack) {
@@ -60,6 +61,11 @@ public class PotionBrewing {
     }
 
     public static boolean hasMix(ItemStack input, ItemStack ingredient) {
+        // Paper start - Custom Potion Mixes
+        if (hasCustomMix(input, ingredient)) {
+            return true;
+        }
+        // Paper end - Custom Potion Mixes
         return ALLOWED_CONTAINER.test(input) && (hasContainerMix(input, ingredient) || hasPotionMix(input, ingredient));
     }
 
@@ -89,6 +95,13 @@ public class PotionBrewing {
 
     public static ItemStack mix(ItemStack ingredient, ItemStack input) {
         if (!input.isEmpty()) {
+            // Paper start - Custom Potion Mixes
+            for (var mix : CUSTOM_MIXES.values()) {
+                if (mix.input().test(input) && mix.ingredient().test(ingredient)) {
+                    return mix.result().copy();
+                }
+            }
+            // Paper end - Custom Potion Mixes
             Potion potion = PotionUtils.getPotion(input);
             Item item = input.getItem();
 
@@ -108,6 +121,54 @@ public class PotionBrewing {
         return input;
     }
 
+    // Paper start - Custom Potion Mixes
+    public static boolean isCustomIngredient(ItemStack stack) {
+        for (var mix : CUSTOM_MIXES.values()) {
+            if (mix.ingredient().test(stack)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public static boolean isCustomInput(ItemStack stack) {
+        for (var mix : CUSTOM_MIXES.values()) {
+            if (mix.input().test(stack)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private static boolean hasCustomMix(ItemStack input, ItemStack ingredient) {
+        for (var mix : CUSTOM_MIXES.values()) {
+            if (mix.input().test(input) && mix.ingredient().test(ingredient)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public static void addPotionMix(io.papermc.paper.potion.PotionMix mix) {
+        if (CUSTOM_MIXES.containsKey(mix.getKey())) {
+            throw new IllegalArgumentException("Duplicate recipe ignored with ID " + mix.getKey());
+        }
+        CUSTOM_MIXES.putAndMoveToFirst(mix.getKey(), new io.papermc.paper.potion.PaperPotionMix(mix));
+    }
+
+    public static boolean removePotionMix(org.bukkit.NamespacedKey key) {
+        return CUSTOM_MIXES.remove(key) != null;
+    }
+
+    public static void reload() {
+        POTION_MIXES.clear();
+        CONTAINER_MIXES.clear();
+        ALLOWED_CONTAINERS.clear();
+        CUSTOM_MIXES.clear();
+        bootStrap();
+    }
+    // Paper end - Custom Potion Mixes
+
     public static void bootStrap() {
         addContainer(Items.POTION);
         addContainer(Items.SPLASH_POTION);
diff --git a/src/main/java/net/minecraft/world/level/block/entity/BrewingStandBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/BrewingStandBlockEntity.java
index b31d7053abf1d2432b4887dab2bd8f8cc5308554..9bb542ce3a8c52e1688bb1f66fc916dd23a5fd10 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/BrewingStandBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/BrewingStandBlockEntity.java
@@ -341,7 +341,7 @@ public class BrewingStandBlockEntity extends BaseContainerBlockEntity implements
 
     @Override
     public boolean canPlaceItem(int slot, ItemStack stack) {
-        return slot == 3 ? PotionBrewing.isIngredient(stack) : (slot == 4 ? stack.is(Items.BLAZE_POWDER) : (stack.is(Items.POTION) || stack.is(Items.SPLASH_POTION) || stack.is(Items.LINGERING_POTION) || stack.is(Items.GLASS_BOTTLE)) && this.getItem(slot).isEmpty());
+        return slot == 3 ? PotionBrewing.isIngredient(stack) : (slot == 4 ? stack.is(Items.BLAZE_POWDER) : (stack.is(Items.POTION) || stack.is(Items.SPLASH_POTION) || stack.is(Items.LINGERING_POTION) || stack.is(Items.GLASS_BOTTLE) || PotionBrewing.isCustomInput(stack)) && this.getItem(slot).isEmpty()); // Paper - Custom Potion Mixes
     }
 
     @Override
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index f629991fa998d4dab89ed5c3d26b1b7a4f85b5cb..d8bec75e7f5c034051839818f51cdae71863608c 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -306,6 +306,7 @@ public final class CraftServer implements Server {
     private final io.papermc.paper.datapack.PaperDatapackManager datapackManager; // Paper
     public static Exception excessiveVelEx; // Paper - Velocity warnings
     private final io.papermc.paper.logging.SysoutCatcher sysoutCatcher = new io.papermc.paper.logging.SysoutCatcher(); // Paper
+    private final CraftPotionBrewer potionBrewer = new CraftPotionBrewer(); // Paper - Custom Potion Mixes
 
     static {
         ConfigurationSerialization.registerClass(CraftOfflinePlayer.class);
@@ -332,7 +333,7 @@ public final class CraftServer implements Server {
 
         CraftRegistry.setMinecraftRegistry(console.registryAccess());
 
-        Potion.setPotionBrewer(new CraftPotionBrewer());
+        Potion.setPotionBrewer(potionBrewer); // Paper - Custom Potion Mixes
         // Ugly hack :(
 
         if (!Main.useConsole) {
@@ -3079,5 +3080,10 @@ public final class CraftServer implements Server {
         return datapackManager;
     }
 
+    @Override
+    public CraftPotionBrewer getPotionBrewer() {
+        return this.potionBrewer;
+    }
+
     // Paper end
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftRecipe.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftRecipe.java
index 139dff90561ac6c51954c6289918a07aeea13a1b..6ba29875d78ede4aa7978ff689e588f7fed11528 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftRecipe.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftRecipe.java
@@ -15,6 +15,11 @@ public interface CraftRecipe extends Recipe {
     void addToCraftingManager();
 
     default Ingredient toNMS(RecipeChoice bukkit, boolean requireNotEmpty) {
+        // Paper start
+        return toIngredient(bukkit, requireNotEmpty);
+    }
+    static Ingredient toIngredient(RecipeChoice bukkit, boolean requireNotEmpty) {
+        // Paper end
         Ingredient stack;
 
         if (bukkit == null) {
diff --git a/src/main/java/org/bukkit/craftbukkit/potion/CraftPotionBrewer.java b/src/main/java/org/bukkit/craftbukkit/potion/CraftPotionBrewer.java
index 09ac71b6b41c757832792d9ea8ac9288f8a7404f..2909a2736a0c9d863c7ab01e0ec259f7952080cc 100644
--- a/src/main/java/org/bukkit/craftbukkit/potion/CraftPotionBrewer.java
+++ b/src/main/java/org/bukkit/craftbukkit/potion/CraftPotionBrewer.java
@@ -28,4 +28,21 @@ public class CraftPotionBrewer implements PotionBrewer {
     public PotionEffect createEffect(PotionEffectType potion, int duration, int amplifier) {
         return new PotionEffect(potion, potion.isInstant() ? 1 : (int) (duration * potion.getDurationModifier()), amplifier);
     }
+
+    // Paper start
+    @Override
+    public void addPotionMix(io.papermc.paper.potion.PotionMix potionMix) {
+        net.minecraft.world.item.alchemy.PotionBrewing.addPotionMix(potionMix);
+    }
+
+    @Override
+    public void removePotionMix(org.bukkit.NamespacedKey key) {
+        net.minecraft.world.item.alchemy.PotionBrewing.removePotionMix(key);
+    }
+
+    @Override
+    public void resetPotionMixes() {
+        net.minecraft.world.item.alchemy.PotionBrewing.reload();
+    }
+    // Paper end
 }