Revamp goals as resources

core/goals/goal_requirement_data.gd

@@ -0,0 +1,42 @@
+class_name GoalRequirementData
+extends Resource
+
+@export var currency: Resource
+@export var amount_mantissa: float = 0.0
+@export var amount_exponent: int = 0
+
+func get_currency_id() -> StringName:
+	if currency == null:
+		return &""
+
+	return GameState.get_currency_id(currency)
+
+func get_amount() -> BigNumber:
+	return BigNumber.new(amount_mantissa, amount_exponent)
+
+func has_valid_currency() -> bool:
+	var currency_id: StringName = get_currency_id()
+	if currency_id == &"":
+		return false
+
+	return GameState.is_known_currency_id(currency_id)
+
+func has_valid_amount() -> bool:
+	return get_amount().mantissa >= 0.0
+
+func is_valid() -> bool:
+	return has_valid_currency() and has_valid_amount()
+
+func is_met() -> bool:
+	if not is_valid():
+		return false
+
+	var total_amount: BigNumber = GameState.get_total_currency_acquired_by_id(get_currency_id())
+	return not total_amount.is_less_than(get_amount())
+
+func get_summary_text() -> String:
+	if not is_valid():
+		return ""
+
+	var currency_name: String = GameState.get_currency_name(get_currency_id())
+	return "%s %s" % [get_amount().to_string_suffix(2), currency_name]