Basic inventory, item and storage

scripts/inventory/inventory_slot.gd

@@ -0,0 +1,59 @@
+@tool
+extends RefCounted
+
+class_name InventorySlot
+
+@export_storage var held_item : Item:
+	set(value):
+		if held_item == null and value != null:
+			held_item = value
+			amount += 1
+			return
+		held_item = value
+	get:
+		return held_item
+
+@export_storage var amount : int:
+	set(value):
+		if value <= 0:
+			held_item = null
+			amount = 0
+			return
+		if held_item == null:
+			return
+		if value > held_item.stack_size:
+			amount = held_item.stack_size
+			return
+		amount = value
+	get:
+		return amount
+
+func extract_stack(extract_amount: int) -> Stack:
+	var return_stack : Stack
+	if extract_amount > amount:
+		return_stack = Stack.new(held_item,amount)
+	else:
+		return_stack = Stack.new(held_item,extract_amount)
+	
+	self.amount = 0
+	
+	return return_stack
+
+func extract() -> Stack:
+	var return_stack : Stack = Stack.new(held_item,amount)
+	self.amount = 0
+	
+	return return_stack
+
+func merge_stack(stack: Stack) -> Stack:
+	if held_item == null:
+		held_item = stack.held_item
+		amount = stack.amount
+		return null
+	if stack.held_item != held_item:
+		return null
+	var return_stack_amount = max(0,stack.amount-amount)
+	amount += stack.amount - return_stack_amount
+	if return_stack_amount == 0:
+		return null
+	return Stack.new(held_item,return_stack_amount)