Jukebox

This is a simple challenge app that simulates a Jukebox where users can select songs and add them to a playlist. The app uses a database to store the songs in the playlist and provides a console interface to interact with the user.

Let's dance

To run the code without worrying about local dependencies, you can use a Docker environment. Alternatively, you can follow the installation steps below to run it on your local machine.

Create the image using the following command:

docker build -t jukebox . 

After the image is created, you can create a container and run the app using the following command:

docker run -it --rm jukebox 

Development environment

Docker environment

The project provides a php runtime environment using Docker and docker compose. To start the docker environment, just run the following command.

docker compose up -d

After the environment is up and running, you can access the container using the following command.

docker compose exec php sh

Local environment

This step is for users without docker installed. To run the project locally, you need to follow the steps below.

• PHP 8.2 is required to run this project.
• Install the php dependencies using Composer.

Dependencies

The project use composer to manage the dependencies. Run the following command to install the dependencies.

composer install

Migrations

The project utilizes SQLite as the database to eliminate the requirement for a database server. The migration scripts can be found in the /migrations directory. To create the database and tables, execute the following command.

./bin/console doctrine:migrations:migrate

Running the app

If you arrive here, you have all the dependencies installed and the database created. Now you can run the app using the next command.

./bin/console jukebox

Project structure

The project structure is inspired in hexagonal architecture, which may seem like an overkill for this particular project. However, I believe that it is a well-known structure that facilitates understanding of each part and its purpose.

It's not the place to explain the hexagonal architecture in detail, but I will give a brief overview. The main idea is to separate the application into layers, each one with its own responsibility:

• The Application layer is responsible for handling the uses cases.
• The Domain layer is responsible for the business rules and contains the Model, Repository, and Service.
• The Infrastructure layer is responsible for the implementation of the interfaces defined in the Domain layer.
• The Presentation layer is responsible for the user interface.

  |-- src
  |   |-- Application
  |   |   |-- UseCase
  |   |-- Domain
  |   |-- Infrastructure
  |   |-- Presentation
  |       |-- Console
 

Code style

I prefer tidy code, and a tool like PHP-CS-Fixer is excellent for maintaining clean and consistent code according to coding standards like PSR-1, PSR-2 ... Use the following command to fix the code style.

composer fix

Static analysis

Static analysis is a great tool to find bugs and improve the quality of the code. PHPStan is a great solution for this. Use the following command to run the static analysis.

composer analyse

Tests

The project provides a small set of unit and integration tests. The tests are written using PHPUnit. Use the following command to run the tests.

composer test