Added trading system and cargo saving

scripts/menu/BaseMenu.gd

@@ -1,3 +1,97 @@
 extends Control
 
 var base
+@onready var ship = get_tree().current_scene.ship
+@onready var sell_list = $TradingMenu/SellList
+@onready var buy_list = $TradingMenu/BuyList
+@onready var main_menu_header = $MainMenu/Header
+@onready var sell_input = $TradingMenu/SellInput
+@onready var buy_input = $TradingMenu/BuyInput
+@onready var sell_button = $TradingMenu/SellButton
+@onready var buy_button = $TradingMenu/BuyButton
+
+var base_types = ["Power Supply", "Mining", "Food Production", "Trading", "Modules"]
+
+func _ready():
+	update_lists()
+	main_menu_header.text = "{BaseType} Station".format({"BaseType" : base_types[base.type]})
+	buy_button.button_up.connect(buy_item)
+	sell_button.button_up.connect(sell_item)
+	buy_input.text_changed.connect(buy_text_changed)
+	sell_input.text_changed.connect(sell_text_changed)
+
+func update_lists():
+	buy_list.clear()
+	sell_list.clear()
+	for i in range(len(base.want_to_buy)):
+		var format = {
+			"name" : base.want_to_buy[i].name,
+			"price" : base.buy_prices[i]
+		}
+		var buy_text = "{name} -> {price} MU".format(format)
+		buy_list.add_item(buy_text, base.want_to_buy[i].icon)
+	
+	for i in range(len(base.want_to_sell)):
+		var format = {
+			"name" : base.want_to_sell[i].name,
+			"price" : base.sell_prices[i]
+		}
+		var sell_text = "{name} <- {price} MU".format(format)
+		sell_list.add_item(sell_text, base.want_to_sell[i].icon)
+
+func buy_item():
+	var amount = int(sell_input.text)
+	amount = clamp(amount, 0, amount)
+	if amount <= 0:
+		sell_input.text = ""
+		sell_input.placeholder_text = "Wrong amount!"
+		return
+	if len(sell_list.get_selected_items()) == 0:
+		sell_input.text = ""
+		sell_input.placeholder_text = "Item not chosen!"
+		return
+	var item_data = sell_list.get_item_text(sell_list.get_selected_items()[0]).split(" <- ")
+	var price = float(item_data[1])
+	var total_price = price * amount
+	if total_price > ship.money:
+		sell_input.text = ""
+		sell_input.placeholder_text = "Insufficient funds!"
+		return
+	if ship.hull.cargo.has(item_data[0]):
+		ship.hull.cargo[item_data[0]] += amount
+	else:
+		ship.hull.cargo[item_data[0]] = amount
+	ship.money -= total_price
+	print(ship.hull.cargo)
+
+func sell_item():
+	if len(buy_list.get_selected_items()) == 0:
+		buy_input.text = ""
+		buy_input.placeholder_text = "Item not chosen!"
+		return
+	var item_data = buy_list.get_item_text(buy_list.get_selected_items()[0]).split(" -> ")
+	if !ship.hull.cargo.has(item_data[0]):
+		buy_input.text = ""
+		buy_input.placeholder_text = "No such item in cargo!"
+		return
+	var price = float(item_data[1])
+	var amount = int(buy_input.text)
+	var total_price = price * amount
+	amount = clamp(amount, 0, amount)
+	if amount <= 0:
+		buy_input.text = ""
+		buy_input.placeholder_text = "Wrong amount!"
+		return
+	if amount > ship.hull.cargo[item_data[0]]:
+		buy_input.text = ""
+		buy_input.placeholder_text = "Can't sell more than have!"
+		return
+	ship.hull.cargo[item_data[0]] -= amount
+	ship.money += total_price
+	print(ship.hull.cargo)
+
+func buy_text_changed(_new_text):
+	buy_input.placeholder_text = "Amount to sell"
+
+func sell_text_changed(_new_text):
+	sell_input.placeholder_text = "Amount to buy"