Stage 12: Data storage system

src/main/java/dev/loki/item/ItemMedkit.java

@@ -0,0 +1,96 @@
+package dev.loki.item;
+
+import org.bukkit.Material;
+import org.bukkit.NamespacedKey;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.ItemMeta;
+import org.bukkit.persistence.PersistentDataContainer;
+import org.bukkit.persistence.PersistentDataType;
+
+import java.util.Arrays;
+
+public class ItemMedkit implements BaseItem {
+
+    private static final NamespacedKey ITEM_KEY = new NamespacedKey("mdbd", "item_type");
+    private static final NamespacedKey CHARGES_KEY = new NamespacedKey("mdbd", "charges");
+
+    private final int charges;
+
+    public ItemMedkit() {
+        this(ItemType.MEDKIT.getDefaultCharges());
+    }
+
+    public ItemMedkit(int charges) {
+        this.charges = charges;
+    }
+
+    @Override
+    public ItemType getType() {
+        return ItemType.MEDKIT;
+    }
+
+    @Override
+    public ItemStack createItemStack() {
+        ItemStack item = new ItemStack(Material.PAPER);
+        ItemMeta meta = item.getItemMeta();
+        if (meta != null) {
+            meta.setDisplayName("§a" + getType().getDisplayName());
+            meta.setLore(Arrays.asList(
+                "§7" + getType().getDescription(),
+                "§eCharges: §f" + charges + "/" + getType().getDefaultCharges(),
+                "§7Right-click to heal"
+            ));
+
+            PersistentDataContainer pdc = meta.getPersistentDataContainer();
+            pdc.set(ITEM_KEY, PersistentDataType.STRING, getItemId());
+            pdc.set(CHARGES_KEY, PersistentDataType.INTEGER, charges);
+
+            item.setItemMeta(meta);
+        }
+        return item;
+    }
+
+    @Override
+    public boolean canUse(Player player) {
+        return charges > 0;
+    }
+
+    @Override
+    public void onUse(Player player) {
+        if (charges > 0) {
+            player.sendMessage("§aYou start healing...");
+        }
+    }
+
+    @Override
+    public void onDeplete(Player player) {
+        player.getInventory().setItemInMainHand(null);
+        player.sendMessage("§cYour medkit has been depleted!");
+    }
+
+    @Override
+    public int getCharges() {
+        return charges;
+    }
+
+    @Override
+    public void setCharges(int charges) {
+    }
+
+    @Override
+    public boolean isDepleted() {
+        return charges <= 0;
+    }
+
+    @Override
+    public String getItemId() {
+        return "MEDKIT";
+    }
+
+    public static boolean isMedkit(ItemStack item) {
+        if (item == null || !item.hasItemMeta()) return false;
+        PersistentDataContainer pdc = item.getItemMeta().getPersistentDataContainer();
+        return "MEDKIT".equals(pdc.get(ITEM_KEY, PersistentDataType.STRING));
+    }
+}