模板脚本文件

scripts/inventory/inventory_slot.gd

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+class_name InventorySlot
+extends RefCounted
+
+var item_id: String = ""
+var quantity: int = 0
+
+
+func is_empty() -> bool:
+	return item_id.is_empty() or quantity <= 0
+
+
+func add_item(item: Item, amount: int = 1) -> int:
+	var max_quantity = item.max_stack if item.stackable else 1
+	if is_empty():
+		item_id = item.id
+		quantity = min(amount, max_quantity)
+		return amount - quantity
+	if item_id == item.id and item.stackable:
+		var space_available = item.max_stack - quantity
+		var amount_to_add = min(amount, space_available)
+		quantity += amount_to_add
+		return amount - amount_to_add
+	return amount
+
+
+func remove_item(amount: int = 1) -> int:
+	var removed = min(amount, quantity)
+	quantity -= removed
+	if quantity <= 0:
+		clear()
+	return removed
+
+
+func clear() -> void:
+	item_id = ""
+	quantity = 0
+
+
+func to_dict() -> Dictionary:
+	return {"item_id": item_id, "quantity": quantity}
+
+
+func from_dict(data: Dictionary) -> void:
+	item_id = data.get("item_id", "")
+	quantity = data.get("quantity", 0)
+
+	if is_empty():
+		clear()
+		return
+
+	var item = ItemDatabase.get_item(item_id)
+	if not item:
+		clear()
+		return
+
+	var max_quantity = item.max_stack if item.stackable else 1
+	quantity = clampi(quantity, 1, max_quantity)