joebailey26/cmo

CMO Technical Interview

The Brief

Create a VAT calculator that shows a history of calculations requested that can be exported as a CSV file.

• For user provided monetary value V and VAT percentage rate R, calculate and display both sets of calculations:
  • Where V is treated as being ex VAT show the original value V, the value V with VAT added and the amount of VAT calculated at the rate R.
  • Where V is treated as being inc VAT show the original value V, the value V with VAT subtracted and the amount of VAT calculated at the rate R.
• The results from each requested set of calculations should be stored, and displayed on screen as a table of historical calculations.
• The history should be able to be cleared and exportable to a CSV file.
• Host your final code on a public git remote (github, bitbucket, etc) that we can access and ensure you have added a README file to document your specific files for us to review.

You are free to use your preferred stack, be it WAMP/MAMP or Docker with K8s etc. You must however ensure you use PHP7.4 - 8.2 and MariaDB.

Bonus points

• Migrate or build your calculator on a Symfony project
• Prevent against XSS & SQL injection

Prerequisites

• PHP8
• Composer
• Symfony CLI

Getting started

1. Install dependencies composer install
2. Set up your .env file ensuring you have database credentials in there
3. Create the database php bin/console doctrine:database:create
4. Set up the database php bin/console doctrine:migrations:migrate
5. Start the dev server symfony server:start and navigate to http://127.0.0.1:8000/

Running tests

1. Create the database php bin/console doctrine:database:create --env=test
2. Set up the database php bin/console doctrine:migrations:migrate --env=test
3. Run the tests php bin/phpunit

To Enhance

• Style the front-end
• Add more tests

Comments

I've never used Symfony before. This took about half a day. Check out https://github.com/joebailey26/cmo/commit/fabbcf4a5f7e6ac44b4c331b03a15755b0f17152 for the files I actually changed. You can see a demo here https://cmo.joebailey.xyz