लारवेल के साथ DRY सिद्धांत

1. ज्ञान का दोहराव हमेशा सिद्धांत का उल्लंघन है
2. कोड दोहराव हमेशा सिद्धांत का उल्लंघन नहीं है

class UserController
{
    public function create(CreateRequest $request)
    {
        $user = User::create($request->all());
        
        return view('user.created', compact('user'));
    }
}

class UserApiController
{
    public function create(CreateRequest $request)
    {
        $user = User::create($request->all());
        
        return response()->noContent(201);
    }
}

class UserService
{
    public function create(array $data): User
    {
        $user = new User;
        $user->email = $data['email'];
        $user->password = $data['password'];
        $user->save();

        return $user;
    }
    
    public function delete($userId): bool 
    {
        $user = User::findOrFail($userId);
 
        return $user->delete();
    }    
}

class UserService
{
    protected $blogService;
    
    public function __construct(BlogService $blogService)
    {
        $this->blogService = $blogService;
    }

    public function create(array $data): User
    {
        $user = new User;
        $user->email = $data['email'];
        $user->password = $data['password'];
        $user->save();
        
        $blog = $this->blogService->create();
        $user->blogs()->attach($blog);

        return $user;
    }
    
    //Other methods
}

CreateUser सिंगल एक्शन क्लास

• प्रदर्शन करने की क्रिया का प्रतिनिधित्व करने वाला नाम
• एक एकल सार्वजनिक विधि है (मैं __inoke मैजिक विधि का उपयोग करूंगा )
• सभी आवश्यक निर्भरताएँ हैं
• अपने भीतर सभी व्यावसायिक नियमों का अनुपालन सुनिश्चित करता है, उनका उल्लंघन होने पर अपवाद उत्पन्न करता है

class CreateUser
{
    protected $blogService;

    public function __construct(BlogService $blogService)
    {
        $this->blogService = $blogService;
    }

    public function __invoke(array $data): User
    {
        $email = $data['email'];
        
        if (User::whereEmail($email)->first()) {
            throw new EmailNotUniqueException("$email should be unique!");
        }
        
        $user = new User;
        $user->email = $data['email'];
        $user->password = $data['password'];
        $user->save();

        $blog = $this->blogService->create();
        $user->blogs()->attach($blog);

        return $user;
    }
}

class UserController
{
    public function create(CreateRequest $request, CreateUser $createUser)
    {
        $user = $createUser($request->all());

        return view('user.created', compact('user'));
    }
}

class UserApiController
{
    public function create(CreateRequest $request, CreateUser $createUser)
    {
        $user = $createUser($request->all());

        return response()->noContent(201);
    }
}

class ImportUser
{
    protected $createUser;
    
    public function __construct(CreateUser $createUser)
    {
        $this->createUser = $createUser;
    }
    
    public function handle(array $rows): Collection
    {
        return collect($rows)->map(function (array $row) {
            try {
                return $this->createUser($row);
            } catch (EmailNotUniqueException $e) {
                // Deal with duplicate users
            }
        });
    }
}

ड्रेसिंग

class LogCreateUser extends CreateUser 
{
    public function __invoke(array $data)
    {
        Log::info("A new user has registered: " . $data['email']);
        
        parent::__invoke($data);
    }
}

class AppServiceProvider extends ServiceProvider
{

    // ...

    public function register()
    {
        $this->app->bind(CreateUser::class, LogCreateUser::class);
    }

class AppServiceProvider extends ServiceProvider
{

    // ...

    public function register()
    {
         if (config("users.log_registration")) {
             $this->app->bind(CreateUser::class, LogCreateUser::class);
         }
    }

निष्कर्ष