Destination Resolver - PHP Technical Test

The Destination Resolver can take some input parameters and resolve them to a destination URL.

The Input Parameters:

cid is the campaign ID. We want to resolve this campaign's destination URL. The cid is an integer.
aid is the affiliate ID. The affiliate is our traffic source. The aid is an integer.
sid is a Sub ID - identifying the affiliate's traffic source. It can be any URL safe string.

The Destination URL Template

Each campaign has a destination URL template (see "destination" property in campaigns.json). A destination URL template can contain placeholders, also known as tokens, which need to be populated.

The available tokens are:

{cid} - The campaign ID taken from the input parameters
{aid} - The Affiliate ID taken from the input parameters
{sid} - The Sub ID taken from the input parameters
{rand} - A random integer
{date} - The current date (format: 2016-02-29)

Example

Campaign JSON:

{
  "id": "1001374",
  "title": "(WAP-Android) WhatsApp Wallpapers (3G+Wifi) - Argentina",
  "destination": "http:\/\/m.ar.mundome.com\/wap\/938\/?af_e_offer={cid}&af_code={rand}&af_e={aid}&af_e_sid={sid}&date={date}"
}

Input:

Campaign ID: 1001374
Affiliate ID: 702005
Sub ID: hello-there

Result Destination URL:

http://m.ar.mundome.com/wap/938/?af_e_offer=1001374&af_code=6854764&af_e=702005&af_e_sid=hello-there&date=2016-03-02

How to Run the App

Install composer packages: php composer.phar install
Simply use the following Artisan command to use PHP's built in server: php artisan serve
The readme will be accessible at http://localhost:8000/readme
The app will be accessible at http://localhost:8000/destinations/resolve

Tasks

1. Populate campaigns and affiliates select options from JSON data

File paths:

storage/data/campaigns.json
storage/data/affiliates.json

Hint: The storage_path() helper function will help you to access the data.

Please order campaigns by title and please order affiliates by name.

2. Implement the ResolveDestination service

This service can resolve the given input (cid, aid and sid) into the corresponding populated destination URL.

You will have to use the campaigns.json data to find the corresponding destination URL template and then populate any tokens as described above.

The class has been stubbed out for you at: app/Services/Destination/ResolveDestination.php

Hint: Feel free to refactor the given code as you see fit or add any additional classes you may need for your solution.

Please unit test this service using phpunit:

Starter test file: tests/Destination/Service/ResolveDestinationTest.php
Simply run phpunit to run your tests

Bonus Task: Add Validation

At least cid and aid have to be selected, otherwise display an error message.

Useful Resources

App Structure

Routes are located in app/Http/routes.php
Controllers are located under app/Http/Controllers/
Views are located under resources/views
Tests are located under tests
Services are located under app/Services
Repositories are located under app/Repositories
The main IoC registrations are located in app/Providers\AppServiceProvider.php

bmesin / php-destination-resolver