Code Challenge

This challenge is to route traffic according to buyer rules. You will set up an http server (do not use express, see example-server if you need an example) that can create and retrieve "buyers". The http server will also route traffic according to the preferences of the buyers.

Setup

run npm i in order to install required packages.

Tests

Challenge is evaluated based on tests. Be sure to understand how servertest works.

run npm test in order to get the tests output

Challenge Conditions

Your code must follow our rules and guidelines, and in order to pass the challenge all tests should be passing like in example below:

> node test/index.js && standard

TAP version 13
# should add buyers
ok 1 correct statusCode
ok 2 correct statusCode
ok 3 correct statusCode
ok 4 should not error
# should not add invalid buyer
ok 5 should not error
ok 6 error statusCode
# should get buyers
ok 7 correct statusCode
ok 8 buyer should match
ok 9 correct statusCode
ok 10 buyer should match
ok 11 correct statusCode
ok 12 buyer should match
ok 13 should not error
# should route traffic
ok 14 correct statusCode
ok 15 correct statusCode
ok 16 correct statusCode
ok 17 should not error
ok 18 routes should match

1..18
# tests 18
# pass  18

# ok

Create a module lib/server.js that exports a function. This function, createServer, when invoked, should return an http server with the following endpoints:

POST /buyers
GET /buyers/:id
GET /route

All persistence should use redis. Source code should be in src dir and use redis client factory from src/redis.js

See test/index.js for more details.

`POST /buyers`

This endpoint accepts a JSON body representing a "buyer" like the following example:

{
  "id": "c",
  "offers": [
    {
      "criteria": {
        "device": ["desktop"],
        "hour": [0, 1, 2],
        "day": [0],
        "state": ["CA"]
      },
      "value": 50,
      "location": "http://0.c.com"
    }
  ]
}

The buyer has two top-level properties, id and offers. offers is an array of what the "buyer" is offering to buy. In the example, if a request object has the device "desktop", an hour that is one of "0", "1", or "2", a day of "0", and state "CA", that buyer will pay a value of 50 for it to go to location "http://0.c.com".

`GET /buyers/:id`

This retrieves a "buyer" document by :id. Example /buyers/c for the above "buyer".

`GET /route`

This will compare a request object to the offers of the "buyers" and route traffic to the highest valued matching location. Parameters for this endpoint:

timestamp: ISO timestamp (e.g. new Date().toISOString())
device: "desktop" or "mobile"
state: US State (e.g. "CA", "NY")

Example Request:

GET /route?timestamp=2017-03-12T10%3A30%3A00.000Z&state=NV&device=mobile

Example Response Headers:

{ location: http://0.c.com }

ip / challenge-buyer-router