Merge pull request 'added Anti Player Loot despawn' (#16) from feature/AntiPlayerLootDespawn into master

Reviewed-on: #16

craftattack/src/main/java/eu/mhsl/craftattack/spawn/craftattack/appliances/metaGameplay/antiPlayerLootDespawn/AntiPlayerLootDespawn.java

@@ -0,0 +1,45 @@
+package eu.mhsl.craftattack.spawn.craftattack.appliances.metaGameplay.antiPlayerLootDespawn;
+
+import eu.mhsl.craftattack.spawn.core.appliance.Appliance;
+import org.bukkit.NamespacedKey;
+import org.bukkit.entity.Item;
+import org.bukkit.event.Listener;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.persistence.PersistentDataType;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+import java.util.Locale;
+
+public class AntiPlayerLootDespawn extends Appliance {
+    private static final int extraCycles = 5;
+    private static final String namespace = AntiPlayerLootDespawnListener.class.getSimpleName().toLowerCase(Locale.ROOT);
+    public static NamespacedKey cyclesKey = new NamespacedKey(namespace, "item_deaths_cycles".toLowerCase());
+
+    public void markItems(List<ItemStack> item) {
+        item.forEach(itemStack ->
+            itemStack.editPersistentDataContainer(persistentDataContainer ->
+                persistentDataContainer.set(cyclesKey, PersistentDataType.INTEGER, extraCycles)
+            )
+        );
+    }
+
+    public boolean isItemAboveMaxAge(Item item) {
+        ItemStack itemStack = item.getItemStack();
+
+        int cycles = itemStack.getPersistentDataContainer()
+                .getOrDefault(AntiPlayerLootDespawn.cyclesKey, PersistentDataType.INTEGER, 0);
+
+        itemStack.editPersistentDataContainer(data ->
+                data.set(AntiPlayerLootDespawn.cyclesKey, PersistentDataType.INTEGER, cycles - 1)
+        );
+
+        item.setItemStack(itemStack);
+        return cycles > 0;
+    }
+
+    @Override
+    protected @NotNull List<Listener> listeners() {
+        return List.of(new AntiPlayerLootDespawnListener());
+    }
+}

craftattack/src/main/java/eu/mhsl/craftattack/spawn/craftattack/appliances/metaGameplay/antiPlayerLootDespawn/AntiPlayerLootDespawnListener.java

@@ -0,0 +1,19 @@
+package eu.mhsl.craftattack.spawn.craftattack.appliances.metaGameplay.antiPlayerLootDespawn;
+
+import eu.mhsl.craftattack.spawn.core.appliance.ApplianceListener;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.entity.ItemDespawnEvent;
+import org.bukkit.event.entity.PlayerDeathEvent;
+
+class AntiPlayerLootDespawnListener extends ApplianceListener<AntiPlayerLootDespawn> {
+
+    @EventHandler
+    public void onDeath(PlayerDeathEvent event) {
+        this.getAppliance().markItems(event.getDrops());
+    }
+
+    @EventHandler
+    public void onItemDespawn(ItemDespawnEvent event) {
+        event.setCancelled(this.getAppliance().isItemAboveMaxAge(event.getEntity()));
+    }
+}