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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Tassu <git@tassu.me>
Date: Thu, 13 Sep 2018 08:45:21 +0300
Subject: [PATCH] Implement furnace cook speed multiplier API

Signed-off-by: Tassu <git@tassu.me>

Fixed an issue where a furnace's cook-speed multiplier rounds down
to the nearest Integer when updating its current cook time.

Modified by: Eric Su <ericsu@alumni.usc.edu>

diff --git a/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java
index c3c53a34f645a834256c31951e465ae33aa1a9ff..635d47d4bea679e96736ef891c40f57488cbc6a1 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java
@@ -75,6 +75,7 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
     protected NonNullList<ItemStack> items;
     public int litTime;
     int litDuration;
+    public double cookSpeedMultiplier = 1.0; // Paper - cook speed multiplier API
     public int cookingProgress;
     public int cookingTotalTime;
     protected final ContainerData dataAccess;
@@ -281,6 +282,11 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
             this.recipesUsed.put(new ResourceLocation(s), nbttagcompound1.getInt(s));
         }
 
+        // Paper start - cook speed API
+        if (nbt.contains("Paper.CookSpeedMultiplier")) {
+            this.cookSpeedMultiplier = nbt.getDouble("Paper.CookSpeedMultiplier");
+        }
+        // Paper end
     }
 
     @Override
@@ -289,6 +295,7 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
         nbt.putShort("BurnTime", (short) this.litTime);
         nbt.putShort("CookTime", (short) this.cookingProgress);
         nbt.putShort("CookTimeTotal", (short) this.cookingTotalTime);
+        nbt.putDouble("Paper.CookSpeedMultiplier", this.cookSpeedMultiplier); // Paper - cook speed multiplier API
         ContainerHelper.saveAllItems(nbt, this.items);
         CompoundTag nbttagcompound1 = new CompoundTag();
 
@@ -351,7 +358,7 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
                     CraftItemStack source = CraftItemStack.asCraftMirror(blockEntity.items.get(0));
                     CookingRecipe<?> recipe = (CookingRecipe<?>) irecipe.toBukkitRecipe();
 
-                    FurnaceStartSmeltEvent event = new FurnaceStartSmeltEvent(CraftBlock.at(world, pos), source, recipe);
+                    FurnaceStartSmeltEvent event = new FurnaceStartSmeltEvent(CraftBlock.at(world, pos), source, recipe, AbstractFurnaceBlockEntity.getTotalCookTime(world, blockEntity.recipeType, blockEntity, blockEntity.cookSpeedMultiplier)); // Paper - cook speed multiplier API
                     world.getCraftServer().getPluginManager().callEvent(event);
 
                     blockEntity.cookingTotalTime = event.getTotalCookTime();
@@ -359,9 +366,9 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
                 // CraftBukkit end
 
                 ++blockEntity.cookingProgress;
-                if (blockEntity.cookingProgress == blockEntity.cookingTotalTime) {
+                if (blockEntity.cookingProgress >= blockEntity.cookingTotalTime) { // Paper - cook speed multiplier API
                     blockEntity.cookingProgress = 0;
-                    blockEntity.cookingTotalTime = AbstractFurnaceBlockEntity.getTotalCookTime(world, blockEntity.recipeType, blockEntity);
+                    blockEntity.cookingTotalTime = AbstractFurnaceBlockEntity.getTotalCookTime(world, blockEntity.recipeType, blockEntity, blockEntity.cookSpeedMultiplier);
                     if (AbstractFurnaceBlockEntity.burn(blockEntity.level, blockEntity.worldPosition, irecipe, blockEntity.items, i)) { // CraftBukkit
                         blockEntity.setRecipeUsed(irecipe);
                     }
@@ -461,9 +468,13 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
         }
     }
 
-    private static int getTotalCookTime(Level world, RecipeType<? extends AbstractCookingRecipe> recipeType, Container inventory) {
-        return (world != null) ? (Integer) world.getRecipeManager().getRecipeFor((RecipeType<AbstractCookingRecipe>) recipeType, inventory, world).map(AbstractCookingRecipe::getCookingTime).orElse(200) : 200; // CraftBukkit - SPIGOT-4302 // Eclipse fail
+    // Paper begin - Expose this function so CraftFurnace can correctly scale the total cooking time to a new multiplier
+    public static int getTotalCookTime(@Nullable Level world, RecipeType<? extends AbstractCookingRecipe> recipeType, Container inventory, final double cookSpeedMultiplier) {
+        /* Scale the recipe's cooking time to the current cookSpeedMultiplier */
+        int cookTime = (world != null ? world.getRecipeManager() : net.minecraft.server.MinecraftServer.getServer().getRecipeManager()).getRecipeFor(recipeType, inventory, world /* passing a null level here is safe. world is only used for map extending recipes which won't happen here */).map(AbstractCookingRecipe::getCookingTime).orElse(200); // CraftBukkit - SPIGOT-4302 // Eclipse fail
+        return (int) Math.ceil (cookTime / cookSpeedMultiplier);
     }
+    // Paper end
 
     public static boolean isFuel(ItemStack stack) {
         return AbstractFurnaceBlockEntity.getFuel().containsKey(stack.getItem());
@@ -532,7 +543,7 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
         }
 
         if (slot == 0 && !flag) {
-            this.cookingTotalTime = AbstractFurnaceBlockEntity.getTotalCookTime(this.level, this.recipeType, this);
+            this.cookingTotalTime = AbstractFurnaceBlockEntity.getTotalCookTime(this.level, this.recipeType, this, this.cookSpeedMultiplier);
             this.cookingProgress = 0;
             this.setChanged();
         }
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftFurnace.java b/src/main/java/org/bukkit/craftbukkit/block/CraftFurnace.java
index facf95a44b5d3a63fda156c6afc8cabe50b21d32..3da4616c904d47bbecae0d4cb6970496fbec9a8b 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftFurnace.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftFurnace.java
@@ -78,4 +78,20 @@ public abstract class CraftFurnace<T extends AbstractFurnaceBlockEntity> extends
 
         return recipesUsed.build();
     }
+
+    // Paper start - cook speed multiplier API
+    @Override
+    public double getCookSpeedMultiplier() {
+        return this.getSnapshot().cookSpeedMultiplier;
+    }
+
+    @Override
+    public void setCookSpeedMultiplier(double multiplier) {
+        com.google.common.base.Preconditions.checkArgument(multiplier >= 0, "Furnace speed multiplier cannot be negative");
+        com.google.common.base.Preconditions.checkArgument(multiplier <= 200, "Furnace speed multiplier cannot more than 200");
+        T snapshot = this.getSnapshot();
+        snapshot.cookSpeedMultiplier = multiplier;
+        snapshot.cookingTotalTime = AbstractFurnaceBlockEntity.getTotalCookTime(this.isPlaced() ? this.world.getHandle() : null, snapshot.recipeType, snapshot, snapshot.cookSpeedMultiplier); // Update the snapshot's current total cook time to scale with the newly set multiplier
+    }
+    // Paper end
 }