created merged obstacle data struct (#42)

* created merged obstacle data struct

* bug fix

modules/obstacles_and_odometry.py

@@ -0,0 +1,49 @@
+"""
+Obstacles and local odometry merged data structure.
+"""
+
+from . import drone_odometry_local
+from . import obstacle
+
+
+class ObstaclesAndOdometry:
+    """
+    Contains obstacles and current local odometry.
+    """
+
+    __create_key = object()
+
+    @classmethod
+    def create(
+        cls,
+        obstacles: "list[obstacle.Obstacle]",
+        local_odometry: drone_odometry_local.DroneOdometryLocal,
+    ) -> "tuple[bool, ObstaclesAndOdometry | None]":
+        """
+        Combines obstacles with local odometry.
+        """
+        if local_odometry is None:
+            return False, None
+
+        return True, ObstaclesAndOdometry(cls.__create_key, obstacles, local_odometry)
+
+    def __init__(
+        self,
+        create_key: object,
+        obstacles: "list[obstacle.Obstacle]",
+        local_odometry: drone_odometry_local.DroneOdometryLocal,
+    ) -> None:
+        """
+        Private constructor, use create() method.
+        """
+        assert create_key is ObstaclesAndOdometry.__create_key, "Use create() method"
+
+        self.obstacles = obstacles
+        self.odometry = local_odometry
+
+    def __str__(self) -> str:
+        """
+        String representation.
+        """
+        obstacles_str = ", ".join(str(obstacle) for obstacle in self.obstacles)
+        return f"{self.__class__.__name__}, Obstacles: ({len(self.obstacles)}): {obstacles_str}, str{self.odometry}"