XITE intro-task

Welcome to xite intro-task! 🤩

The rules of the game

Implement RESTful service with Akka, Akka HTTP, Cats which serves as a very high level recommendation system. There should be two requests with corresponding responses.

Register user

request sould be of the following format:

POST {"userName": "David", "email": "david@gmail.com", "age": 28, "gender": 1}

Request sould be validated:

email
age range 5-120
gender in [1, 2], where 1 for male, 2 for female

Respose should be of format:

200 OK { "userId": 9797345L, "videoId":4324556L }

Action

Action is a response to Register, reaction on sent video.

POST {"userId": 9797345L, "videoId":4324556L, "actionId": 3}

where userId and videoId correspond to Register response.

Request should be validated for existing userId, videoId and actionId.

Response should of format:

200 OK
{ "userId": 9797345L, "videoId":6454556L }

For both requests there should be following error response format:

400 Bad Request
{ "errors": [
    "email is not valid",
    "age is not valid",
    "gender is not valid",
    "video does not correspond to last given",
    "userId does not exist"
    ]
}

On every Register request there should be created a dedicated actor which tracks this user activity.
Actor should track last video, such that if Action request sends id which was not given in previous response, it will reply with error (one above).

On Action request routing mechanism should validate if actor for userId exists, otherwise send error response (one above).

Generic validation should be done on Akka HTTP layer with Cats such that all errors are merged in single error response.

Video ids (videoId) should be preconfigured and limited to 10 random Long values, Action should select least watched from the list.

Action ids (actionId) are limited to the list [1, 2, 3] where:

 1 - like,
 2 - skip,
 3 - play.

That does not affect logic, just for background info.

Application should be build with SBT, and latest versions of Scala and libraries.

After sbt run application should be up and running on http://localhost:8085 [/register] and [/action].

Notes

The project took around 22 hours of work to reach this stage, as of 2018-07-12

License