Implements Clean Architecture with PHP

Implements Clean Architecture as described by Robert C. Martin (Uncle Bob) here:
Clean Architecture

This is an opinionated package that defines levels of the architecture and the dependencies between them.
And uses deptrac to check if the levels are respected.

• Installation
• Getting started
  • Commands
    • Install
    • Check
    • Rector
    • Make Entity
    • Make Repository
    • Make UseCase
    • Make Controller
    • Make Service
• Why Clean Architecture
• Concepts
  • Architecture Level
  • UseCase
• How it works
  • Levels
  • Define a level inside the project
  • UseCases
    • BaseUseCase
    • Events
• CI/CD
• Testing
• Frameworks
  • Laravel
    • Pulse

Installation

You can install the package via composer:

composer require giacomomasseron/php-clean-architecture

After the installation, you must run the install command to publish the deptrac.yaml, php-clean-architecture.yaml and rector.php config files to your root folder:

vendor/bin/php-clean-architecture install

Getting started

To check the architecture levels in your project, use the following command:

vendor/bin/php-clean-architecture check

Commands

All make commands read the php-clean-architecture.yaml config file to know where to put the files created and which namespace they belong to.

Install

The install command publishes needed files your root folder.
If you have already rector installed, you must add these lines of code in your rector.php file:

return RectorConfig::configure() // This line is already present in your rector.php file
    ->withConfiguredRule(
        \GiacomoMasseroni\PHPCleanArchitecture\Rector\Rules\AddPHPCleanArchitectureInterfaceControllerToClassesRector::class,
        [
            'targetNamespaces' => [
                'App\Http\Controllers',
            ]
        ]
    )
    ->withConfiguredRule(
        \GiacomoMasseroni\PHPCleanArchitecture\Rector\Rules\AddPHPCleanArchitectureInterfaceEntityToClassesRector::class,
        [
            'targetNamespaces' => [
                'App\Entities',
            ]
        ]
    )
    ->withConfiguredRule(
        \GiacomoMasseroni\PHPCleanArchitecture\Rector\Rules\AddPHPCleanArchitectureInterfaceRepositoryToClassesRector::class,
        [
            'targetNamespaces' => [
                'App\Repositories',
            ]
        ]
    )
    ->withConfiguredRule(
        \GiacomoMasseroni\PHPCleanArchitecture\Rector\Rules\AddPHPCleanArchitectureInterfaceServiceToClassesRector::class,
        [
            'targetNamespaces' => [
                'App\Services',
            ]
        ]
    )
    ->withConfiguredRule(
        \GiacomoMasseroni\PHPCleanArchitecture\Rector\Rules\AddPHPCleanArchitectureInterfaceUseCaseToClassesRector::class,
        [
            'targetNamespaces' => [
                'App\UseCases',
            ]
        ]
    )

Check

The check command checks the architecture levels in your project.
You can use it in your CI/CD pipeline to be sure that the architecture levels are respected.

Rector

The rector command adds the needed interfaces to your classes based on namespaces defined in your config files.

Make Entity

To create an Entity, you can use the following command:

vendor/bin/php-clean-architecture make:entity EntityInYourProject

Make Repository

To create a Repository, you can use the following command:

vendor/bin/php-clean-architecture make:repository UserRepository

Make UseCase

To create a UseCase, you can use the following command:

vendor/bin/php-clean-architecture make:usecase DoSomethingUseCase

Make Controller

To create a Controller, you can use the following command:

vendor/bin/php-clean-architecture make:controller UserController

Make Service

To create a Service, you can use the following command:

vendor/bin/php-clean-architecture make:service ThirdyPartyService  
vendor/bin/php-clean-architecture make:service ThirdyParty

In both cases, the created class will be named ThirdyPartyService.

Why Clean Architecture?

Why not?
It is a well-known, well-structured architecture system.

Concepts

Architecture Level

In the Clean Architecture, a level is a layer of the architecture with a specific function, only connected to the upper level.

The rule of thumb of the Clean Architecture is:
An inner circle must never know anything about the circles around it.

UseCase

UseCase is a concept of Use Cases level.

A UseCase is every action your project performs.
Good examples of use cases are:

• Login
• Register
• CompleteOrder
• UpdateProfile

A use case should be a single, very specific action. It shouldn’t do anything more than its name suggests.

How it works

The package uses deptrac to define the levels and to check the dependencies between them.

Levels

These are the levels defined:

• Entity
• Repository
• UseCase
• Controller
• Service

These are the dependencies between the levels:

graph TD;  
 Controller-->UseCase-->Repository; UseCase-->Service; Repository-->Service; Repository-->Entity;  

Loading

The Entity level must not depend on any other level.
The Repository level can only depend on Entity or Service levels.
The UseCase level can only depend on Repository or Service levels.
The Controller level can only depend on UseCase levels.

What is the Service level?
The Service level can be used for third-party tools or libraries.

Define a level inside the project

The package comes with these interfaces:

• EntityInterface: implement this interface if the class belongs to the Entity level.
• RepositoryInterface: implement this interface if the class belongs to the Repository level.
• UseCaseInterface: implement this interface if the class belongs to the UseCase level.
• ControllerInterface: implement this interface if the class belongs to the Controller level.
• ServiceInterface: implement this interface if the class belongs to the Service level.

If you want your controller to be part of the Controller level, you need to implement the ControllerInterface.
For example:

use GiacomoMasseroni\PHPCleanArchitecture\Contracts\ControllerInterface;  
  
public class YourController implements ControllerInterface  

UseCases

When you create a UseCase, the class needs to extend the BaseUseCase class, and you need to implement the UseCaseInterface.
For example:

use GiacomoMasseroni\PHPCleanArchitecture\BaseUseCase;  
use GiacomoMasseroni\PHPCleanArchitecture\Contracts\UseCaseInterface;  
  
public class DoSomething extends BaseUseCase implements UseCaseInterface  
{  
    public function handle(...$arguments): mixed
    { 
        // 
    }
}  

To execute the UseCase, you need to call the run method defined in the BaseUseCase class:

DoSomething::run($arg1, $arg2);  

BaseUseCase

The package defines an abstract class for use cases: BaseUseCase.
This class defines variable for the user executing the use case:

UseCaseExecutorInterface $executor

You can set the executor using the following example:

DoSomething::actingAs($user)->run($arg1, $arg2);  

If you need to rollback the use case, you can override the rollback method:

public function rollback(): void  
{  
}  

Events

The package dispatches two events, one when the use case starts, and one when the use case ends.
It uses the Symfony Event Dispatcher Component.

The events are:

• UseCaseStartedEvent
• UseCaseCompletedEvent

CI/CD

If you want to check the architecture levels in your CI/CD pipeline, you can use the following command:

vendor/bin/php-clean-architecture check

This command will stop your pipeline if there are architecture violations, based on the deptrac configuration file.

Testing

composer test

Frameworks

Laravel

I wrote an article on how to use this package with Laravel

Pulse

Laravel pulse is a package that helps you to monitor the health of your Laravel application.
If you want to monitor use cases execution time, you can:

• Create two laravel events, UseCaseStarted and UseCaseCompleted
• Create a Pulse card that listens to these events and measures the execution time.
• Add this code to register function in AppServiceProvider.php file:

  \GiacomoMasseroni\PHPCleanArchitecture\Dispatcher::getInstance()->addListener(\GiacomoMasseroni\PHPCleanArchitecture\Events\UseCaseStartedEvent::class, function (\GiacomoMasseroni\PHPCleanArchitecture\Events\UseCaseStartedEvent $event): void {
      // Just propagate the event to Laravel event system
      \App\Events\UseCaseStarted::dispatch($event->useCase);
  });
  
  \GiacomoMasseroni\PHPCleanArchitecture\Dispatcher::getInstance()->addListener(\GiacomoMasseroni\PHPCleanArchitecture\Events\UseCaseCompletedEvent::class, function (\GiacomoMasseroni\PHPCleanArchitecture\Events\UseCaseCompletedEvent $event): void {
      // Just propagate the event to Laravel event system
      \App\Events\UseCaseCompleted::dispatch($event->useCase);
  });

Changelog

Please see CHANGELOG for more information on what has changed recently.

Contributing

Please see CONTRIBUTING for details.

Security Vulnerabilities

Please review our security policy on how to report security vulnerabilities.

Credits

• Giacomo Masseroni
• All Contributors

License

The MIT License (MIT). Please see License File for more information.