From ca84cb2143adcd3dbbb2f3143e9088add4e2ee28 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 1 May 2016 15:19:49 -0400
Subject: [PATCH] LootTable API

Provides API to control what Loot Table an object uses.

Also provides an Event to control if a lootable inventory should
auto replenish for a player.

Provides methods to determine players looted state for an object

diff --git a/src/main/java/com/destroystokyo/paper/loottable/Lootable.java b/src/main/java/com/destroystokyo/paper/loottable/Lootable.java
new file mode 100644
index 0000000..d962a0c
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/loottable/Lootable.java
@@ -0,0 +1,78 @@
+package com.destroystokyo.paper.loottable;
+
+/**
+ * Defines an object that has a Loot Table and seed associated with it.
+ *
+ * How the Loot Table and seed are used may vary based on Minecraft Versions
+ * and what type of object is using the Loot Table
+ */
+public interface Lootable {
+
+    /**
+     * Gets the name of the Loot Table to be used in the World Folder
+     * @return The name, or null if no loot table exists
+     */
+    String getLootTableName();
+
+    /**
+     * Returns whether or not this object has a Loot Table
+     * @return Has a loot table
+     */
+    default boolean hasLootTable() {
+        return getLootTableName() != null;
+    }
+
+    /**
+     * Sets the name of the Loot Table to be used in the World Folder
+     * Will use a random seed (0)
+     *
+     * @param name name in either foo or minecraft:foo format
+     * @return The previous Loot Table before the change
+     */
+    default String setLootTable(String name) {
+        return setLootTable(name, 0);
+    }
+
+    /**
+     * Sets the name of the Loot Table to be used in the World Folder
+     * Uses supplied Seed
+     *
+     * @param name name in either foo or minecraft:foo format
+     * @param seed seed for the loot table. If 0, seed will be random
+     * @return The previous Loot Table before the change
+     */
+    String setLootTable(String name, long seed);
+
+    /**
+     * Gets the current seed associated to the Loot Table on this object
+     *
+     * @return The seed, or 0 for random
+     */
+    long getLootTableSeed();
+
+    /**
+     * Changes the current seed associated with the Loot Table on this object.
+     *
+     * The seed will have no affect if this object does not have a Loot Table
+     * associated with it.
+     *
+     * @throws IllegalStateException If called when this object does not have a loot table
+     * @param seed The seed to use, or 0 for random
+     * @return The previous seed
+     */
+    default long setLootTableSeed(long seed) {
+        final String lootTableName = getLootTableName();
+        if (lootTableName == null) {
+            throw new IllegalStateException("This object does not currently have a Loot Table.");
+        }
+
+        long prev = getLootTableSeed();
+        setLootTable(lootTableName, seed);
+        return prev;
+    }
+
+    /**
+     * Clears the associated Loot Table to this object
+     */
+    void clearLootTable();
+}
diff --git a/src/main/java/com/destroystokyo/paper/loottable/LootableBlockInventory.java b/src/main/java/com/destroystokyo/paper/loottable/LootableBlockInventory.java
new file mode 100644
index 0000000..5e93e7e
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/loottable/LootableBlockInventory.java
@@ -0,0 +1,12 @@
+package com.destroystokyo.paper.loottable;
+
+import org.bukkit.block.Block;
+
+public interface LootableBlockInventory extends LootableInventory {
+
+    /**
+     * Gets the block that is lootable
+     * @return The Block
+     */
+    Block getBlock();
+}
diff --git a/src/main/java/com/destroystokyo/paper/loottable/LootableEntityInventory.java b/src/main/java/com/destroystokyo/paper/loottable/LootableEntityInventory.java
new file mode 100644
index 0000000..8bebf07
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/loottable/LootableEntityInventory.java
@@ -0,0 +1,12 @@
+package com.destroystokyo.paper.loottable;
+
+import org.bukkit.entity.Entity;
+
+public interface LootableEntityInventory extends LootableInventory {
+
+    /**
+     * Gets the entity that is lootable
+     * @return The Entity
+     */
+    Entity getEntity();
+}
diff --git a/src/main/java/com/destroystokyo/paper/loottable/LootableInventory.java b/src/main/java/com/destroystokyo/paper/loottable/LootableInventory.java
new file mode 100644
index 0000000..cde999e
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/loottable/LootableInventory.java
@@ -0,0 +1,111 @@
+package com.destroystokyo.paper.loottable;
+
+import org.bukkit.entity.Player;
+
+import java.util.UUID;
+
+/**
+ * Represents an Inventory that contains a Loot Table associated to it that will
+ * automatically fill on first open.
+ *
+ * A new feature and API is provided to support automatically refreshing the contents
+ * of the inventory based on that Loot Table after a configurable amount of time has passed.
+ *
+ * The behavior of how the Inventory is filled based on the loot table may vary based
+ * on Minecraft versions and the Loot Table feature.
+ */
+public interface LootableInventory extends Lootable {
+
+    /**
+     * Server owners have to enable whether or not an object in a world should refill
+     *
+     * @return If the world this inventory is currently in has Replenishable Lootables enabled
+     */
+    boolean isRefillEnabled();
+
+    /**
+     * Whether or not this object has ever been filled
+     * @return Has ever been filled
+     */
+    boolean hasBeenFilled();
+
+    /**
+     * Has this player ever looted this block
+     * @param player The player to check
+     * @return Whether or not this player has looted this block
+     */
+    default boolean hasPlayerLooted(Player player) {
+        return hasPlayerLooted(player.getUniqueId());
+    }
+
+    /**
+     * Has this player ever looted this block
+     * @param player The player to check
+     * @return Whether or not this player has looted this block
+     */
+    boolean hasPlayerLooted(UUID player);
+
+    /**
+     * Gets the timestamp, in milliseconds, of when the player last looted this object
+     *
+     * @param player The player to check
+     * @return Timestamp last looted, or null if player has not looted this object
+     */
+    default Long getLastLooted(Player player) {
+        return getLastLooted(player.getUniqueId());
+    }
+
+    /**
+     * Gets the timestamp, in milliseconds, of when the player last looted this object
+     *
+     * @param player The player to check
+     * @return Timestamp last looted, or null if player has not looted this object
+     */
+    Long getLastLooted(UUID player);
+
+    /**
+     * Change the state of whether or not a player has looted this block
+     * @param player The player to change state for
+     * @param looted true to add player to looted list, false to remove
+     * @return The previous state of whether the player had looted this or not
+     */
+    default boolean setHasPlayerLooted(Player player, boolean looted) {
+        return setHasPlayerLooted(player.getUniqueId(), looted);
+    }
+
+    /**
+     * Change the state of whether or not a player has looted this block
+     * @param player The player to change state for
+     * @param looted true to add player to looted list, false to remove
+     * @return The previous state of whether the player had looted this or not
+     */
+    boolean setHasPlayerLooted(UUID player, boolean looted);
+
+    /**
+     * Returns Whether or not this object has been filled and now has a pending refill
+     * @return Has pending refill
+     */
+    boolean hasPendingRefill();
+
+    /**
+     * Gets the timestamp in milliseconds that the Lootable object was last refilled
+     *
+     * @return -1 if it was never refilled, or timestamp in milliseconds
+     */
+    long getLastFilled();
+
+    /**
+     * Gets the timestamp in milliseconds that the Lootable object will refill
+     *
+     * @return -1 if it is not scheduled for refill, or timestamp in milliseconds
+     */
+    long getNextRefill();
+
+    /**
+     * Sets the timestamp in milliseconds of the next refill for this object
+     *
+     * @param refillAt timestamp in milliseconds. -1 to clear next refill
+     * @return The previous scheduled time to refill, or -1 if was not scheduled
+     */
+    long setNextRefill(long refillAt);
+}
diff --git a/src/main/java/com/destroystokyo/paper/loottable/LootableInventoryReplenishEvent.java b/src/main/java/com/destroystokyo/paper/loottable/LootableInventoryReplenishEvent.java
new file mode 100644
index 0000000..2169493
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/loottable/LootableInventoryReplenishEvent.java
@@ -0,0 +1,41 @@
+package com.destroystokyo.paper.loottable;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerEvent;
+
+public class LootableInventoryReplenishEvent extends PlayerEvent implements Cancellable {
+    private final LootableInventory inventory;
+
+    public LootableInventoryReplenishEvent(Player player, LootableInventory inventory) {
+        super(player);
+        this.inventory = inventory;
+    }
+
+    public LootableInventory getInventory() {
+        return inventory;
+    }
+
+    private static final HandlerList handlers = new HandlerList();
+
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+
+    private boolean cancelled = false;
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancel) {
+        cancelled = cancel;
+    }
+}
diff --git a/src/main/java/org/bukkit/block/Chest.java b/src/main/java/org/bukkit/block/Chest.java
index ade09dd..368306d 100644
--- a/src/main/java/org/bukkit/block/Chest.java
+++ b/src/main/java/org/bukkit/block/Chest.java
@@ -1,13 +1,14 @@
 package org.bukkit.block;
 
 import org.bukkit.Nameable;
+import com.destroystokyo.paper.loottable.LootableInventory; // Paper
 import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.InventoryHolder;
 
 /**
  * Represents a chest.
  */
-public interface Chest extends BlockState, InventoryHolder, Lockable, Nameable {
+public interface Chest extends BlockState, InventoryHolder, Lockable, Nameable, LootableInventory { // Paper
 
     /**
      * Returns the chest's inventory. If this is a double chest, it returns
diff --git a/src/main/java/org/bukkit/block/Dispenser.java b/src/main/java/org/bukkit/block/Dispenser.java
index 39ee9b0..236ffa3 100644
--- a/src/main/java/org/bukkit/block/Dispenser.java
+++ b/src/main/java/org/bukkit/block/Dispenser.java
@@ -1,13 +1,14 @@
 package org.bukkit.block;
 
 import org.bukkit.Nameable;
+import com.destroystokyo.paper.loottable.LootableInventory; // Paper
 import org.bukkit.inventory.InventoryHolder;
 import org.bukkit.projectiles.BlockProjectileSource;
 
 /**
  * Represents a dispenser.
  */
-public interface Dispenser extends BlockState, InventoryHolder, Lockable, Nameable {
+public interface Dispenser extends BlockState, InventoryHolder, Lockable, Nameable, LootableInventory { // Paper
 
     /**
      * Gets the BlockProjectileSource object for this dispenser.
diff --git a/src/main/java/org/bukkit/block/Hopper.java b/src/main/java/org/bukkit/block/Hopper.java
index 8e5e3e8..c08a1a5 100644
--- a/src/main/java/org/bukkit/block/Hopper.java
+++ b/src/main/java/org/bukkit/block/Hopper.java
@@ -1,9 +1,12 @@
 package org.bukkit.block;
 
 import org.bukkit.Nameable;
+import com.destroystokyo.paper.loottable.LootableInventory; // Paper
 import org.bukkit.inventory.InventoryHolder;
 
 /**
  * Represents a hopper.
  */
-public interface Hopper extends BlockState, InventoryHolder, Lockable, Nameable { }
+public interface Hopper extends BlockState, InventoryHolder, Lockable, Nameable, LootableInventory { // Paper
+
+}
-- 
2.10.2