Paper/patches/server/0277-Improve-exact-choice-recipe-ingredients.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sun, 25 Jun 2023 23:10:14 -0700
Subject: [PATCH] Improve exact choice recipe ingredients

Fixes exact choices not working with recipe book clicks
and shapeless recipes.

== AT ==
public net.minecraft.world.item.ItemStackLinkedSet TYPE_AND_TAG
public net.minecraft.world.entity.player.StackedContents put(II)V
public net.minecraft.world.entity.player.StackedContents take(II)I

diff --git a/src/main/java/io/papermc/paper/inventory/recipe/RecipeBookExactChoiceRecipe.java b/src/main/java/io/papermc/paper/inventory/recipe/RecipeBookExactChoiceRecipe.java
new file mode 100644
index 0000000000000000000000000000000000000000..ef68600f6b59674ddea6c77f7e412902888e39b7
--- /dev/null
+++ b/src/main/java/io/papermc/paper/inventory/recipe/RecipeBookExactChoiceRecipe.java
@@ -0,0 +1,30 @@
+package io.papermc.paper.inventory.recipe;
+
+import net.minecraft.world.Container;
+import net.minecraft.world.item.crafting.Ingredient;
+import net.minecraft.world.item.crafting.Recipe;
+
+public abstract class RecipeBookExactChoiceRecipe<C extends net.minecraft.world.item.crafting.RecipeInput> implements Recipe<C> {
+
+    private boolean hasExactIngredients;
+
+    protected final void checkExactIngredients() {
+        // skip any special recipes
+        if (this.isSpecial()) {
+            this.hasExactIngredients = false;
+            return;
+        }
+        for (final Ingredient ingredient : this.getIngredients()) {
+            if (!ingredient.isEmpty() && ingredient.exact) {
+                this.hasExactIngredients = true;
+                return;
+            }
+        }
+        this.hasExactIngredients = false;
+    }
+
+    @Override
+    public final boolean hasExactIngredients() {
+        return this.hasExactIngredients;
+    }
+}
diff --git a/src/main/java/io/papermc/paper/inventory/recipe/StackedContentsExtraMap.java b/src/main/java/io/papermc/paper/inventory/recipe/StackedContentsExtraMap.java
new file mode 100644
index 0000000000000000000000000000000000000000..568ba6aed2e74b8d84f4e82c1e785ef1587e2617
--- /dev/null
+++ b/src/main/java/io/papermc/paper/inventory/recipe/StackedContentsExtraMap.java
@@ -0,0 +1,109 @@
+package io.papermc.paper.inventory.recipe;
+
+import it.unimi.dsi.fastutil.ints.Int2IntArrayMap;
+import it.unimi.dsi.fastutil.ints.Int2IntMap;
+import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
+import it.unimi.dsi.fastutil.ints.IntArrayList;
+import it.unimi.dsi.fastutil.ints.IntComparators;
+import it.unimi.dsi.fastutil.ints.IntList;
+import it.unimi.dsi.fastutil.objects.Object2IntMap;
+import it.unimi.dsi.fastutil.objects.Object2IntOpenCustomHashMap;
+import java.util.IdentityHashMap;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicInteger;
+import net.minecraft.core.registries.BuiltInRegistries;
+import net.minecraft.world.entity.player.StackedContents;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.ItemStackLinkedSet;
+import net.minecraft.world.item.crafting.CraftingInput;
+import net.minecraft.world.item.crafting.Ingredient;
+import net.minecraft.world.item.crafting.Recipe;
+
+public final class StackedContentsExtraMap {
+
+    private final AtomicInteger idCounter = new AtomicInteger(BuiltInRegistries.ITEM.size()); // start at max vanilla stacked contents idx
+    public final Object2IntMap<ItemStack> exactChoiceIds = new Object2IntOpenCustomHashMap<>(ItemStackLinkedSet.TYPE_AND_TAG);
+    private final Int2ObjectMap<ItemStack> idToExactChoice = new Int2ObjectOpenHashMap<>();
+    private final StackedContents contents;
+    public final Map<Ingredient, IntList> extraStackingIds = new IdentityHashMap<>();
+
+    public StackedContentsExtraMap(final StackedContents contents, final Recipe<?> recipe) {
+        this.exactChoiceIds.defaultReturnValue(-1);
+        this.contents = contents;
+        this.initialize(recipe);
+    }
+
+    private void initialize(final Recipe<?> recipe) {
+        if (recipe.hasExactIngredients()) {
+            for (final Ingredient ingredient : recipe.getIngredients()) {
+                if (!ingredient.isEmpty() && ingredient.exact) {
+                    final net.minecraft.world.item.ItemStack[] items = ingredient.getItems();
+                    final IntList idList = new IntArrayList(items.length);
+                    for (final ItemStack item : items) {
+                        idList.add(this.registerExact(item)); // I think not copying the stack here is safe because cb copies the stack when creating the ingredient
+                        if (item.getComponentsPatch().isEmpty()) {
+                            // add regular index if it's a plain itemstack but still registered as exact
+                            idList.add(StackedContents.getStackingIndex(item));
+                        }
+                    }
+                    idList.sort(IntComparators.NATURAL_COMPARATOR);
+                    this.extraStackingIds.put(ingredient, idList);
+                }
+            }
+        }
+    }
+
+    private int registerExact(final ItemStack exactChoice) {
+        final int existing = this.exactChoiceIds.getInt(exactChoice);
+        if (existing > -1) {
+            return existing;
+        }
+        final int id = this.idCounter.getAndIncrement();
+        this.exactChoiceIds.put(exactChoice, id);
+        this.idToExactChoice.put(id, exactChoice);
+        return id;
+    }
+
+    public ItemStack getById(int id) {
+        return this.idToExactChoice.get(id);
+    }
+
+    public Int2IntMap regularRemoved = new Int2IntArrayMap();
+    public void accountInput(final CraftingInput input) {
+        // similar logic to the CraftingInput constructor
+        for (final ItemStack item : input.items()) {
+            if (!item.isEmpty()) {
+                if (this.accountStack(item, 1)) {
+                    // remove one of the items if it was added to the contents as a non-extra item
+                    final int plainStackIdx = StackedContents.getStackingIndex(item);
+                    if (this.contents.take(plainStackIdx, 1) == plainStackIdx) {
+                        this.regularRemoved.put(plainStackIdx, 1);
+                    }
+                }
+            }
+        }
+    }
+
+    public void resetExtras() {
+        // clear previous extra ids
+        for (final int extraId : this.exactChoiceIds.values()) {
+            this.contents.contents.remove(extraId);
+        }
+        for (final Int2IntMap.Entry entry : this.regularRemoved.int2IntEntrySet()) {
+            this.contents.put(entry.getIntKey(), entry.getIntValue());
+        }
+    }
+
+    public boolean accountStack(final ItemStack stack, final int count) {
+        if (!this.exactChoiceIds.isEmpty()) {
+            final int id = this.exactChoiceIds.getInt(stack);
+            if (id >= 0) {
+                this.contents.put(id, count);
+                return true;
+            }
+        }
+        return false;
+    }
+}
diff --git a/src/main/java/io/papermc/paper/inventory/recipe/package-info.java b/src/main/java/io/papermc/paper/inventory/recipe/package-info.java
new file mode 100644
index 0000000000000000000000000000000000000000..413dfa52760db393ad6a8b5341200ee704a864fc
--- /dev/null
+++ b/src/main/java/io/papermc/paper/inventory/recipe/package-info.java
@@ -0,0 +1,5 @@
+@DefaultQualifier(NonNull.class)
+package io.papermc.paper.inventory.recipe;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.framework.qual.DefaultQualifier;
diff --git a/src/main/java/net/minecraft/recipebook/ServerPlaceRecipe.java b/src/main/java/net/minecraft/recipebook/ServerPlaceRecipe.java
index 0bd749af8014dd437229594ef6981a2ead803990..6d1f9c15dc99917a2ac966ea38ef1970f4f0289c 100644
--- a/src/main/java/net/minecraft/recipebook/ServerPlaceRecipe.java
+++ b/src/main/java/net/minecraft/recipebook/ServerPlaceRecipe.java
@@ -31,6 +31,7 @@ public class ServerPlaceRecipe<I extends RecipeInput, R extends Recipe<I>> imple
             this.inventory = entity.getInventory();
             if (this.testClearGrid() || entity.isCreative()) {
                 this.stackedContents.clear();
+                this.stackedContents.initializeExtras(recipe.value(), null); // Paper - Improve exact choice recipe ingredients
                 entity.getInventory().fillStackedContents(this.stackedContents);
                 this.menu.fillCraftSlotsStackedContents(this.stackedContents);
                 if (this.stackedContents.canCraft(recipe.value(), null)) {
@@ -77,7 +78,7 @@ public class ServerPlaceRecipe<I extends RecipeInput, R extends Recipe<I>> imple
             int l = k;
 
             for (int m : intList) {
-                ItemStack itemStack2 = StackedContents.fromStackingIndex(m);
+                ItemStack itemStack2 = StackedContents.fromStackingIndexWithExtras(m, this.stackedContents); // Paper - Improve exact choice recipe ingredients
                 if (!itemStack2.isEmpty()) {
                     int n = itemStack2.getMaxStackSize();
                     if (n < l) {
@@ -96,12 +97,22 @@ public class ServerPlaceRecipe<I extends RecipeInput, R extends Recipe<I>> imple
     @Override
     public void addItemToSlot(Integer input, int slot, int amount, int gridX, int gridY) {
         Slot slot2 = this.menu.getSlot(slot);
-        ItemStack itemStack = StackedContents.fromStackingIndex(input);
+        // Paper start - Improve exact choice recipe ingredients
+        ItemStack itemStack = null;
+        boolean isExact = false;
+        if (this.stackedContents.extrasMap != null && input >= net.minecraft.core.registries.BuiltInRegistries.ITEM.size()) {
+            itemStack = StackedContents.fromStackingIndexExtras(input, this.stackedContents.extrasMap).copy();
+            isExact = true;
+        }
+        if (itemStack == null) {
+            itemStack = StackedContents.fromStackingIndex(input);
+        }
+        // Paper end - Improve exact choice recipe ingredients
         if (!itemStack.isEmpty()) {
             int i = amount;
 
             while (i > 0) {
-                i = this.moveItemToGrid(slot2, itemStack, i);
+                i = this.moveItemToGrid(slot2, itemStack, i, isExact); // Paper - Improve exact choice recipe ingredients
                 if (i == -1) {
                     return;
                 }
@@ -133,8 +144,15 @@ public class ServerPlaceRecipe<I extends RecipeInput, R extends Recipe<I>> imple
         return i;
     }
 
+    @Deprecated @io.papermc.paper.annotation.DoNotUse // Paper - Improve exact choice recipe ingredients
+
     protected int moveItemToGrid(Slot slot, ItemStack stack, int i) {
-        int j = this.inventory.findSlotMatchingUnusedItem(stack);
+        // Paper start - Improve exact choice recipe ingredients
+        return this.moveItemToGrid(slot, stack, i, false);
+    }
+    protected int moveItemToGrid(Slot slot, ItemStack stack, int i, final boolean isExact) {
+        int j = isExact ? this.inventory.findSlotMatchingItem(stack) : this.inventory.findSlotMatchingUnusedItem(stack);
+        // Paper end - Improve exact choice recipe ingredients
         if (j == -1) {
             return -1;
         } else {
diff --git a/src/main/java/net/minecraft/world/entity/player/StackedContents.java b/src/main/java/net/minecraft/world/entity/player/StackedContents.java
index fa5576e41baec4b52c7ebb877924eb91d3775a2d..fcabf630ce1e4949d00f485a5bff66dd1e54a277 100644
--- a/src/main/java/net/minecraft/world/entity/player/StackedContents.java
+++ b/src/main/java/net/minecraft/world/entity/player/StackedContents.java
@@ -22,8 +22,10 @@ import net.minecraft.world.item.crafting.RecipeHolder;
 public class StackedContents {
     private static final int EMPTY = 0;
     public final Int2IntMap contents = new Int2IntOpenHashMap();
+    @Nullable public io.papermc.paper.inventory.recipe.StackedContentsExtraMap extrasMap = null; // Paper - Improve exact choice recipe ingredients
 
     public void accountSimpleStack(ItemStack stack) {
+        if (this.extrasMap != null && !stack.getComponentsPatch().isEmpty() && this.extrasMap.accountStack(stack, Math.min(64, stack.getCount()))) return; // Paper - Improve exact choice recipe ingredients; max of 64 due to accountStack method below
         if (!stack.isDamaged() && !stack.isEnchanted() && !stack.has(DataComponents.CUSTOM_NAME)) {
             this.accountStack(stack);
         }
@@ -37,6 +39,7 @@ public class StackedContents {
         if (!stack.isEmpty()) {
             int i = getStackingIndex(stack);
             int j = Math.min(maxCount, stack.getCount());
+            if (this.extrasMap != null && !stack.getComponentsPatch().isEmpty() && this.extrasMap.accountStack(stack, j)) return; // Paper - Improve exact choice recipe ingredients; if an exact ingredient, don't include it
             this.put(i, j);
         }
     }
@@ -83,6 +86,31 @@ public class StackedContents {
         return itemId == 0 ? ItemStack.EMPTY : new ItemStack(Item.byId(itemId));
     }
 
+    // Paper start - Improve exact choice recipe ingredients
+    public void initializeExtras(final Recipe<?> recipe, @Nullable final net.minecraft.world.item.crafting.CraftingInput input) {
+        this.extrasMap = new io.papermc.paper.inventory.recipe.StackedContentsExtraMap(this, recipe);
+        if (input != null) this.extrasMap.accountInput(input);
+    }
+
+    public void resetExtras() {
+        if (this.extrasMap != null && !this.contents.isEmpty()) {
+            this.extrasMap.resetExtras();
+        }
+        this.extrasMap = null;
+    }
+
+    public static ItemStack fromStackingIndexWithExtras(final int itemId, @Nullable final StackedContents contents) {
+        if (contents != null && contents.extrasMap != null && itemId >= BuiltInRegistries.ITEM.size()) {
+            return fromStackingIndexExtras(itemId, contents.extrasMap);
+        }
+        return fromStackingIndex(itemId);
+    }
+
+    public static ItemStack fromStackingIndexExtras(final int itemId, final io.papermc.paper.inventory.recipe.StackedContentsExtraMap extrasMap) {
+        return extrasMap.getById(itemId).copy();
+    }
+    // Paper end - Improve exact choice recipe ingredients
+
     public void clear() {
         this.contents.clear();
     }
@@ -106,7 +134,7 @@ public class StackedContents {
             this.data = new BitSet(this.ingredientCount + this.itemCount + this.ingredientCount + this.ingredientCount * this.itemCount);
 
             for (int i = 0; i < this.ingredients.size(); i++) {
-                IntList intList = this.ingredients.get(i).getStackingIds();
+                IntList intList = this.getStackingIds(this.ingredients.get(i)); // Paper - Improve exact choice recipe ingredients
 
                 for (int j = 0; j < this.itemCount; j++) {
                     if (intList.contains(this.items[j])) {
@@ -169,7 +197,7 @@ public class StackedContents {
             IntCollection intCollection = new IntAVLTreeSet();
 
             for (Ingredient ingredient : this.ingredients) {
-                intCollection.addAll(ingredient.getStackingIds());
+                intCollection.addAll(this.getStackingIds(ingredient)); // Paper - Improve exact choice recipe ingredients
             }
 
             IntIterator intIterator = intCollection.iterator();
@@ -298,7 +326,7 @@ public class StackedContents {
             for (Ingredient ingredient : this.ingredients) {
                 int j = 0;
 
-                for (int k : ingredient.getStackingIds()) {
+                for (int k : this.getStackingIds(ingredient)) { // Paper - Improve exact choice recipe ingredients
                     j = Math.max(j, StackedContents.this.contents.get(k));
                 }
 
@@ -309,5 +337,17 @@ public class StackedContents {
 
             return i;
         }
+
+        // Paper start - Improve exact choice recipe ingredients
+        private IntList getStackingIds(final Ingredient ingredient) {
+            if (StackedContents.this.extrasMap != null) {
+                final IntList ids = StackedContents.this.extrasMap.extraStackingIds.get(ingredient);
+                if (ids != null) {
+                    return ids;
+                }
+            }
+            return ingredient.getStackingIds();
+        }
+        // Paper end - Improve exact choice recipe ingredients
     }
 }
diff --git a/src/main/java/net/minecraft/world/item/crafting/AbstractCookingRecipe.java b/src/main/java/net/minecraft/world/item/crafting/AbstractCookingRecipe.java
index f3b6466089ee8be59747a16aac2cac84be30617d..45c80500201aabc1e8643427ebfb8818ab966750 100644
--- a/src/main/java/net/minecraft/world/item/crafting/AbstractCookingRecipe.java
+++ b/src/main/java/net/minecraft/world/item/crafting/AbstractCookingRecipe.java
@@ -5,7 +5,7 @@ import net.minecraft.core.NonNullList;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.level.Level;
 
-public abstract class AbstractCookingRecipe implements Recipe<SingleRecipeInput> {
+public abstract class AbstractCookingRecipe extends io.papermc.paper.inventory.recipe.RecipeBookExactChoiceRecipe<SingleRecipeInput> implements Recipe<SingleRecipeInput> { // Paper - improve exact recipe choices
     protected final RecipeType<?> type;
     protected final CookingBookCategory category;
     protected final String group;
@@ -24,6 +24,7 @@ public abstract class AbstractCookingRecipe implements Recipe<SingleRecipeInput>
         this.result = result;
         this.experience = experience;
         this.cookingTime = cookingTime;
+        this.checkExactIngredients(); // Paper - improve exact recipe choices
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/world/item/crafting/Recipe.java b/src/main/java/net/minecraft/world/item/crafting/Recipe.java
index 3cab383e01c124349f3f96bcbcfe91356d51aa30..b57568d5e9c4c148a4b3c303c925a813fdd5dc67 100644
--- a/src/main/java/net/minecraft/world/item/crafting/Recipe.java
+++ b/src/main/java/net/minecraft/world/item/crafting/Recipe.java
@@ -73,4 +73,10 @@ public interface Recipe<T extends RecipeInput> {
     }
 
     org.bukkit.inventory.Recipe toBukkitRecipe(org.bukkit.NamespacedKey id); // CraftBukkit
+
+    // Paper start - improved exact choice recipes
+    default boolean hasExactIngredients() {
+        return false;
+    }
+    // Paper end
 }
diff --git a/src/main/java/net/minecraft/world/item/crafting/ShapedRecipe.java b/src/main/java/net/minecraft/world/item/crafting/ShapedRecipe.java
index 59372daacd6fef45373c0557ccebb6ff5f16f174..63cf2b66f51df68aa3f6d98c69368ce454869d64 100644
--- a/src/main/java/net/minecraft/world/item/crafting/ShapedRecipe.java
+++ b/src/main/java/net/minecraft/world/item/crafting/ShapedRecipe.java
@@ -17,7 +17,7 @@ import org.bukkit.craftbukkit.inventory.CraftShapedRecipe;
 import org.bukkit.inventory.RecipeChoice;
 // CraftBukkit end
 
-public class ShapedRecipe implements CraftingRecipe {
+public class ShapedRecipe extends io.papermc.paper.inventory.recipe.RecipeBookExactChoiceRecipe<CraftingInput> implements CraftingRecipe { // Paper - improve exact recipe choices
 
     final ShapedRecipePattern pattern;
     final ItemStack result;
@@ -31,6 +31,7 @@ public class ShapedRecipe implements CraftingRecipe {
         this.pattern = raw;
         this.result = result;
         this.showNotification = showNotification;
+        this.checkExactIngredients(); // Paper - improve exact recipe choices
     }
 
     public ShapedRecipe(String group, CraftingBookCategory category, ShapedRecipePattern raw, ItemStack result) {
diff --git a/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipe.java b/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipe.java
index 62401d045245ec7e303ec526c09b5e6fa4c9f17b..213ee4aa988dd4c2a5a7be99b1d13f67338e5209 100644
--- a/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipe.java
+++ b/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipe.java
@@ -19,7 +19,7 @@ import org.bukkit.craftbukkit.inventory.CraftRecipe;
 import org.bukkit.craftbukkit.inventory.CraftShapelessRecipe;
 // CraftBukkit end
 
-public class ShapelessRecipe implements CraftingRecipe {
+public class ShapelessRecipe extends io.papermc.paper.inventory.recipe.RecipeBookExactChoiceRecipe<CraftingInput> implements CraftingRecipe { // Paper - improve exact recipe choices
 
     final String group;
     final CraftingBookCategory category;
@@ -31,6 +31,7 @@ public class ShapelessRecipe implements CraftingRecipe {
         this.category = category;
         this.result = result;
         this.ingredients = ingredients;
+        this.checkExactIngredients(); // Paper - improve exact recipe choices
     }
 
     // CraftBukkit start
@@ -75,7 +76,18 @@ public class ShapelessRecipe implements CraftingRecipe {
     }
 
     public boolean matches(CraftingInput input, Level world) {
-        return input.ingredientCount() != this.ingredients.size() ? false : (input.size() == 1 && this.ingredients.size() == 1 ? ((Ingredient) this.ingredients.getFirst()).test(input.getItem(0)) : input.stackedContents().canCraft(this, (IntList) null));
+        // Paper start - unwrap ternary & better exact choice recipes
+        if (input.ingredientCount() != this.ingredients.size()) {
+            return false;
+        }
+        if (input.size() == 1 && this.ingredients.size() == 1) {
+            return this.ingredients.getFirst().test(input.getItem(0));
+        }
+        input.stackedContents().initializeExtras(this, input); // setup stacked contents for this recipe
+        final boolean canCraft = input.stackedContents().canCraft(this, null);
+        input.stackedContents().resetExtras();
+        return canCraft;
+        // Paper end - unwrap ternary & better exact choice recipes
     }
 
     public ItemStack assemble(CraftingInput input, HolderLookup.Provider lookup) {