added price economy

misc/ball_vendor.gd

@@ -4,13 +4,33 @@ extends Node2D
 @export_range(1, 1000) var _basic_ball: int
 @export_range(1, 1000) var _speed_ball: int
 
-@onready var _price_basic_current = _basic_ball
-@onready var _price_speed_current = _speed_ball
+@onready var _price_basic_current: int = _basic_ball
+@onready var _price_speed_current: int = _speed_ball
+
+@onready var _catalogue = {
+	"1": _price_basic_current,
+	"2": _price_speed_current,
+}
+
+signal on_update_ball_price(id: int, new_price: int)
+
+var money: int = 0
 
-# Called when the node enters the scene tree for the first time.
 func _ready():
-	pass # Replace with function body.
+	_update_money()
+	for k in _catalogue:
+		on_update_ball_price.emit(int(k), _catalogue[k])
 
-# Called every frame. 'delta' is the elapsed time since the previous frame.
-func _process(delta):
-	pass
+func may_buy_ball(id: int) -> bool:
+	if _catalogue["%s" % id] <= money:
+		print(_catalogue["%s" % id])
+		money -= _catalogue["%s" % id]
+		_catalogue["%s" % id] = _catalogue["%s" % id] * 1.1
+		_update_money()
+		on_update_ball_price.emit(int(id), _catalogue["%s" % id])
+		return true
+	else:
+		return false
+
+func _update_money():
+	SignalBus.on_money_changed.emit(money)

misc/signal_bus.gd

@@ -1,3 +1,4 @@
 extends Node
 
 signal on_try_buy_ball(id: int)
+signal on_money_changed(new_money: int)