refactoring save_game

core/game_state/save_game_data.gd

@@ -0,0 +1,24 @@
+class_name SaveGameData
+extends Resource
+
+var unlocked_collectibles_ids: Array[String] = []
+var saved_photos: Array[String] = []
+
+func to_dictionary() -> Dictionary:
+	return {
+		"unlocked_collectibles_ids": unlocked_collectibles_ids,
+		"saved_photos": saved_photos,
+	}
+
+static func from_dictionary(data: Dictionary) -> SaveGameData:
+	var save_game_data := SaveGameData.new()
+
+	if data.has("unlocked_collectibles_ids"):
+		for collectible_id in data["unlocked_collectibles_ids"]:
+			save_game_data.unlocked_collectibles_ids.append(str(collectible_id))
+
+	if data.has("saved_photos"):
+		for photo_path in data["saved_photos"]:
+			save_game_data.saved_photos.append(str(photo_path))
+
+	return save_game_data