Started quest system implementation

proto2/system/quest.gd

@@ -0,0 +1,66 @@
+extends Reference
+class_name Quest
+signal complete
+signal failed
+signal started
+var _objectives = []
+var _children = []
+var _title: String
+var _description: String
+var _active: bool = false
+var _complete: bool = false
+func _init(title: String, description: String):
+	_title = title
+	_description = description
+func add_child(quest: Quest):
+	_children.push_back(quest)
+func is_complete():
+	return _complete
+func is_active():
+	return _active
+func update():
+	if !_active:
+		return
+	var m = get_meta("quest")
+	if m != null:
+		for k in _objectives:
+			k.set_meta("quest", m)
+	for k in _objectives:
+		k.update()
+	for k in _children:
+		k.update()
+	_complete = true
+	for k in _objectives:
+		if !k.is_complete():
+			_complete = false
+			break
+	if !_complete:
+		return
+	for k in _children:
+		if !k.is_complete():
+			_complete = false
+			break
+	if _complete:
+		emit_signal("complete", self)
+		_active = false
+func start():
+	_active = true
+	for k in _children:
+		k.start()
+	emit_signal("started", self)
+func get_cur_task_text():
+	var ret: String = "No current task"
+	if _active:
+		for p in _children:
+			if p.is_active():
+				ret = p.get_cur_task_text()
+				return ret
+		for p in _objectives:
+			if !p.is_complete():
+				return p.get_title()
+		return _title
+	return ret
+func get_title():
+	return _title
+func get_description():
+	return _description