Progdrasil/tech-challenge

Technical challenges for candidates

Challenge answer

The following is an answer to the Challenge for the Web Developer position specifically on the Payload-Planner project.

Clock ins

Just a listing of the times spent on this answer:

Start	End	Duration	Comments
2021-04-14 17:25	18:20	55 mins	Setup and planning
2021-04-20 15:51	16:47	56 mins	boiler plate and maven issues
2021-04-20 17:24	22:02	4h 39 mins	actual start to coding, with alot of setup necessary

Technologies used

The language used to code the answer is Kotlin mainly because I like it's type system and its strong functional capabilities.

Development Process

See my notes Notes for more information on the process taken.

Running

In order to run this application, it has been developed and tested in intellij IDEA. For best results use that.

In order to run the application easily, open the file app/src/Application and click the play button next to the main function. From there, it serves a web server on port 8080. There is a listenner for post requests on the root route /. It expects requests of the following format.

{
    "tles": [
        "ISS (ZARYA)\n1 25544U 98067A   21110.88790192  .00002325  00000-0  50487-4 0  9999\n2 25544  51.6450 266.1357 0002502 255.7332 264.5540 15.48912929279711",

        "1 25544U 98067A   21110.88790192  .00002325  00000-0  50487-4 0  9999\n2 25544  51.6450 266.1357 0002502 255.7332 264.5540 15.48912929279711"
    ],
    "targets":[
        {
            "name": "Montreal",
            "lat": 45.50884,
            "lng": -73.58781
        }
    ]
}

Note that the TLE's are compressed into a single line with explicit \n escape characters. This is due to the characteristics of json not being able to take multi-line strings.