Drawing "line" of elements, like a walls in RTS

Phaser 3
1

Hello, I’d like to add a “drawing” line of elements, like a wall in some RTS games. If you press a mouse and move it to the X/Y direction, then it should draw a row of elements.

My problem is I have no idea how to do it properly. I mean, I’m taking care of 3 aspects of such a functionality:

  1. The beginning and ending (is it connected to “something”, for instance, tower)
  2. Does it have any leaks in the line(it should be fully connected with each of parts of the wall)
  3. Has anything changed “while” playing, for instance, it was destroyed or it loses connection to the “something”(tower for instance)

I thought about making a bunch of small objects, but I believe I will have a problem with determining if everything is connected. I had to check everything with each update which I believe is resource-consuming.

I thought about treating it as one object, but I guess I will have a problem with removing parts of the wall or determining the condition of each part.

Then, how should I make this? What’s the proper approach to such a problem?