Assignment: Websocket Remote Control

Description

Your task is to implement remote control backend using RobotJS library and websocket.

The backend should be able to do the following:

Start websocket server
Handle websocket connection
Move mouse (Up, Down, Left, Right)
Draw circle, rectangle and square
Send current mouse coordinates
Send desktop capture

Technical requirements

Task can be implemented on Javascript or Typescript
Use 16 LTS version of Node.js
Only ws, robotjs, cross-env, typescript, ts-node, eslint and its plugins, webpack and its plugins, prettier, @types/* are allowed
The program is started by npm script start in following way:

npm run start

After starting the program displays websocket parameters
After program work finished the program should end websocket work correctly
After each received command program should display the command and result
All commands should be ended with \0

List of websocket commands and their syntax (<- - cmd from frontend, -> - answer):

Navigation over the x and y axis

Move mouse up

<- mouse_up {y px}

Move mouse down

<- mouse_down {y px}

Move mouse left

<- mouse_left {x px}

Move mouse right

<- mouse_right {x px}

Send mouse coordinates

<- mouse_coord
-> mouse coord {x px} {y px}

Drawing
- Draw circle with pushed left button:
```
<- draw_circle {px}
```
- Draw rectangle with pushed left button:
```
<- draw_rectangle {px} {px}
```
- Draw square with pushed left button:
```
<- draw_square {px}
```
Print screen
- Make print screen command and send image:
```
<- prnt_scrn
-> prnt scrn {bitmap buf}
```