Robot Challenge

Play with me!

Description

• The application is a simulation of a toy robot moving on a square tabletop, of dimensions 5 units x 5 units.
• There are no other obstructions on the table surface.
• The robot is free to roam around the surface of the table, but must be prevented from falling to destruction. Any movement that would result in the robot falling from the table must be prevented, however further valid movement commands must still be allowed.

The application can read in commands of the following form:

PLACE X,Y,F
MOVE
LEFT
RIGHT
REPORT
MOVE
REPORT

• PLACE will put the toy robot on the table in position X,Y and facing NORTH, SOUTH, EAST or WEST.
• The origin (0,0) can be considered to be the SOUTH WEST most corner.
• The first valid command to the robot is a PLACE command, after that, any sequence of commands may be issued, in any order, including another PLACE command. The application should discard all commands in the sequence until a valid PLACE command has been executed.
• MOVE will move the toy robot one unit forward in the direction it is currently facing.
• LEFT and RIGHT will rotate the robot 90 degrees in the specified direction without changing the position of the robot.
• REPORT will announce the X,Y and orientation of the robot.
• A robot that is not on the table will ignore the MOVE, LEFT, RIGHT and REPORT commands.
• many REPORT commands can be received per session.
• The application can be exited by EXIT or pressing Ctrl-C.
• Provide test data to exercise the application.

Usage

CLI

Run npm run cli which will prompt with

==== Robot Simulator ====
Commands: `PLACE X,Y,F`, MOVE, LEFT, RIGHT, REPORT

...Now you can start entering commands followed by Enter:

PLACE 2,2,NORTH
REPORT

Web UI

npm run dev

Now browse to http://localhost:4173

Constraints

The toy robot must not fall off the table during movement. This also includes the initial placement of the toy robot. Any move that would cause the robot to fall must be ignored.

Example Input and Output:

PLACE 0,0,NORTH
MOVE
REPORT
Output: 0,1,NORTH

PLACE 0,0,NORTH
LEFT
REPORT
Output: 0,0,WEST

PLACE 1,2,EAST
MOVE
MOVE
LEFT
MOVE
REPORT
Output: 3,3,NORTH