From c34bcad7cc5485514787db9c141cc08843033381 Mon Sep 17 00:00:00 2001
From: kickash32 <kickash32@gmail.com>
Date: Mon, 3 Jun 2019 02:02:39 -0400
Subject: [PATCH] Implement alternative item-despawn-rate


diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 318a470ee..e7bbeef74 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -1,12 +1,17 @@
 package com.destroystokyo.paper;
 
 import java.util.Arrays;
+import java.util.EnumMap;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 import com.destroystokyo.paper.antixray.ChunkPacketBlockControllerAntiXray.ChunkEdgeMode;
 import com.destroystokyo.paper.antixray.ChunkPacketBlockControllerAntiXray.EngineMode;
 import net.minecraft.server.MinecraftServer;
 import org.bukkit.Bukkit;
+import org.bukkit.Material;
+import org.bukkit.configuration.ConfigurationSection;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.spigotmc.SpigotWorldConfig;
 
@@ -562,4 +567,52 @@ public class PaperWorldConfig {
     private void disableRelativeProjectileVelocity() {
         disableRelativeProjectileVelocity = getBoolean("game-mechanics.disable-relative-projectile-velocity", false);
     }
+
+    public boolean altItemDespawnRateEnabled;
+    public Map<Material, Integer> altItemDespawnRateMap;
+    private void altItemDespawnRate() {
+        String path = "alt-item-despawn-rate";
+
+        altItemDespawnRateEnabled = getBoolean(path + ".enabled", false);
+
+        Map<Material, Integer> altItemDespawnRateMapDefault = new EnumMap<>(Material.class);
+        altItemDespawnRateMapDefault.put(Material.COBBLESTONE, 300);
+        for (Material key : altItemDespawnRateMapDefault.keySet()) {
+            config.addDefault("world-settings.default." + path + ".items." + key, altItemDespawnRateMapDefault.get(key));
+        }
+
+        Map<String, Integer> rawMap = new HashMap<>();
+        try {
+            ConfigurationSection mapSection = config.getConfigurationSection("world-settings." + worldName + "." + path + ".items");
+            if (mapSection == null) {
+                mapSection = config.getConfigurationSection("world-settings.default." + path + ".items");
+            }
+            for (String key : mapSection.getKeys(false)) {
+                int val = mapSection.getInt(key);
+                rawMap.put(key, val);
+            }
+        }
+        catch (Exception e) {
+            logError("alt-item-despawn-rate was malformatted");
+            altItemDespawnRateEnabled = false;
+        }
+
+        altItemDespawnRateMap = new EnumMap<>(Material.class);
+        if (!altItemDespawnRateEnabled) {
+            return;
+        }
+
+        for(String key : rawMap.keySet()) {
+            try {
+                altItemDespawnRateMap.put(Material.valueOf(key), rawMap.get(key));
+            } catch (Exception e) {
+                logError("Could not add item " + key + " to altItemDespawnRateMap: " + e.getMessage());
+            }
+        }
+        if(altItemDespawnRateEnabled) {
+            for(Material key : altItemDespawnRateMap.keySet()) {
+                log("Alternative item despawn rate of " + key + ": " + altItemDespawnRateMap.get(key));
+            }
+        }
+    }
 }
diff --git a/src/main/java/net/minecraft/server/EntityItem.java b/src/main/java/net/minecraft/server/EntityItem.java
index bc7e706d1..df26cef6a 100644
--- a/src/main/java/net/minecraft/server/EntityItem.java
+++ b/src/main/java/net/minecraft/server/EntityItem.java
@@ -5,6 +5,7 @@ import java.util.List;
 import java.util.UUID;
 import javax.annotation.Nullable;
 // CraftBukkit start
+import org.bukkit.Material; // Paper
 import org.bukkit.event.entity.EntityPickupItemEvent;
 import org.bukkit.event.player.PlayerPickupItemEvent;
 // CraftBukkit end
@@ -127,7 +128,7 @@ public class EntityItem extends Entity {
                 }
             }
 
-            if (!this.world.isClientSide && this.age >= world.spigotConfig.itemDespawnRate) { // Spigot
+            if (!this.world.isClientSide && this.age >= this.getDespawnRate()) { // Spigot // Paper
                 // CraftBukkit start - fire ItemDespawnEvent
                 if (org.bukkit.craftbukkit.event.CraftEventFactory.callItemDespawnEvent(this).isCancelled()) {
                     this.age = 0;
@@ -151,7 +152,7 @@ public class EntityItem extends Entity {
         this.lastTick = MinecraftServer.currentTick;
         // CraftBukkit end
 
-        if (!this.world.isClientSide && this.age >= world.spigotConfig.itemDespawnRate) { // Spigot
+        if (!this.world.isClientSide && this.age >= this.getDespawnRate()) { // Spigot // Paper
             // CraftBukkit start - fire ItemDespawnEvent
             if (org.bukkit.craftbukkit.event.CraftEventFactory.callItemDespawnEvent(this).isCancelled()) {
                 this.age = 0;
@@ -474,9 +475,16 @@ public class EntityItem extends Entity {
 
     public void u() {
         this.p();
-        this.age = world.spigotConfig.itemDespawnRate - 1; // Spigot
+        this.age = this.getDespawnRate() - 1; // Spigot // Paper
     }
 
+    // Paper start
+    public int getDespawnRate(){
+        Material material = this.getItemStack().getBukkitStack().getType();
+        return world.paperConfig.altItemDespawnRateMap.getOrDefault(material, world.spigotConfig.itemDespawnRate);
+    }
+    // Paper end
+
     @Override
     public Packet<?> N() {
         return new PacketPlayOutSpawnEntity(this);
-- 
2.23.0