Implement furnace cook speed multiplier API. (#1437)

Adds methods `Furnace#getCookSpeedMultiplier()` and
`Furnace#setCookSpeedMultiplier(double)`.

This PR is basically 3516ae34ef for 1.13.

A test plugin may be found [here](https://gist.github.com/supertassu/fade0cce946261732c6299e1ec89290e).

Spigot-API-Patches/0152-Implement-furnace-cook-speed-multiplier-API.patch

@@ -0,0 +1,41 @@
+From 22461a04950e5ef28f7cd61b5d28b091759234d0 Mon Sep 17 00:00:00 2001
+From: Tassu <git@tassu.me>
+Date: Thu, 13 Sep 2018 08:45:01 +0300
+Subject: [PATCH] Implement furnace cook speed multiplier API
+
+Signed-off-by: Tassu <git@tassu.me>
+
+diff --git a/src/main/java/org/bukkit/block/Furnace.java b/src/main/java/org/bukkit/block/Furnace.java
+index ee8a95601..437c7c4fd 100644
+--- a/src/main/java/org/bukkit/block/Furnace.java
++++ b/src/main/java/org/bukkit/block/Furnace.java
+@@ -36,6 +36,26 @@ public interface Furnace extends Container, Nameable {
+      */
+     public void setCookTime(short cookTime);
+ 
++    // Paper start
++    /**
++     * Gets the cook speed multiplier that this {@link Furnace} will cook
++     * compared to vanilla.
++     *
++     * @return the multiplier, a value between 0 and 200
++     */
++    public double getCookSpeedMultiplier();
++
++    /**
++     * Sets the speed multiplier that this {@link Furnace} will cook
++     * compared to vanilla.
++     *
++     * @param multiplier the multiplier to set, a value between 0 and 200
++     * @throws IllegalArgumentException if value is less than 0
++     * @throws IllegalArgumentException if value is more than 200
++     */
++    public void setCookSpeedMultiplier(double multiplier);
++    // Paper end
++
+     @Override
+     public FurnaceInventory getInventory();
+ 
+-- 
+2.19.0
+

Spigot-Server-Patches/0373-Implement-furnace-cook-speed-multiplier-API.patch

@@ -0,0 +1,84 @@
+From a67af428c096543ff34c11bd1b292d72a025f514 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>
+
+diff --git a/src/main/java/net/minecraft/server/TileEntityFurnace.java b/src/main/java/net/minecraft/server/TileEntityFurnace.java
+index c439b20c80..a537d35b73 100644
+--- a/src/main/java/net/minecraft/server/TileEntityFurnace.java
++++ b/src/main/java/net/minecraft/server/TileEntityFurnace.java
+@@ -11,6 +11,7 @@ import java.util.Map.Entry;
+ import javax.annotation.Nullable;
+ // CraftBukkit start
+ import java.util.List;
++
+ import org.bukkit.craftbukkit.block.CraftBlock;
+ import org.bukkit.craftbukkit.entity.CraftHumanEntity;
+ import org.bukkit.craftbukkit.inventory.CraftItemStack;
+@@ -27,6 +28,7 @@ public class TileEntityFurnace extends TileEntityContainer implements IWorldInve
+     private NonNullList<ItemStack> items;
+     private int burnTime;
+     private int ticksForCurrentFuel;
++    public double cookSpeedMultiplier = 1.0; // Paper - cook speed multiplier API
+     private int cookTime;
+     private int cookTimeTotal;
+     private IChatBaseComponent l;
+@@ -220,6 +222,11 @@ public class TileEntityFurnace extends TileEntityContainer implements IWorldInve
+             this.l = IChatBaseComponent.ChatSerializer.a(nbttagcompound.getString("CustomName"));
+         }
+ 
++        // Paper start - cook speed API
++        if (nbttagcompound.hasKey("Paper.CookSpeedMultiplier")) {
++            this.cookSpeedMultiplier = nbttagcompound.getDouble("Paper.CookSpeedMultiplier");
++        }
++        // Paper end
+     }
+ 
+     public NBTTagCompound save(NBTTagCompound nbttagcompound) {
+@@ -227,6 +234,7 @@ public class TileEntityFurnace extends TileEntityContainer implements IWorldInve
+         nbttagcompound.setShort("BurnTime", (short) this.burnTime);
+         nbttagcompound.setShort("CookTime", (short) this.cookTime);
+         nbttagcompound.setShort("CookTimeTotal", (short) this.cookTimeTotal);
++        nbttagcompound.setDouble("Paper.CookSpeedMultiplier", this.cookSpeedMultiplier); // Paper - cook speed multiplier API
+         ContainerUtil.a(nbttagcompound, this.items);
+         nbttagcompound.setShort("RecipesUsedSize", (short) this.m.size());
+         int i = 0;
+@@ -301,8 +309,8 @@ public class TileEntityFurnace extends TileEntityContainer implements IWorldInve
+                 }
+ 
+                 if (this.isBurning() && this.canBurn(irecipe)) {
+-                    ++this.cookTime;
+-                    if (this.cookTime == this.cookTimeTotal) {
++                    this.cookTime += cookSpeedMultiplier; // Paper - cook speed multiplier API
++                    if (this.cookTime >= this.cookTimeTotal) { // Paper - cook speed multiplier API
+                         this.cookTime = 0;
+                         this.cookTimeTotal = this.s();
+                         this.burn(irecipe);
+diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftFurnace.java b/src/main/java/org/bukkit/craftbukkit/block/CraftFurnace.java
+index 469dc4ff2b..0ffbe8cd64 100644
+--- a/src/main/java/org/bukkit/craftbukkit/block/CraftFurnace.java
++++ b/src/main/java/org/bukkit/craftbukkit/block/CraftFurnace.java
+@@ -71,4 +71,18 @@ public class CraftFurnace extends CraftContainer<TileEntityFurnace> implements F
+             furnace.setCustomName(null);
+         }
+     }
++
++    // 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");
++        this.getSnapshot().cookSpeedMultiplier = multiplier;
++    }
++    // Paper end
+ }
+-- 
+2.19.0
+