composer require chinaobject/laravel-pre-request

// before use this package,you may write the controller in this way

namespace App\Http\Controllers;

use Illuminate\Routing\Controller;

class Login extends Controller
{
    public function __invoke(Request $request)
    {
        $this->validate($request,[
            'username' => 'required|email|exists:users,email'
        ],[
            'username.required' => 'username is required' ,
            'username.email' => 'username is an email' , 
            'username.exists' => 'username not found'
        ]);
    }
}

namespace App\Http\FormRequest;

use Chinaobject\PreRequest\PreRequest;

class LoginRequest extends PreRequest
{
    public function rules()
    {
        // the check rules , you can also check the route parameters in this function
        return [
            'username' => 'required',
            'client_ids' => 'array'
        ];
    }
    
    public function messages()
    {
        // the invaild messages
        return [
            'username.*' => 'username must be required',
            'client.*' => 'client must be array'
        ];
    }
    
    public function authorize()
    {
        // the authorize check , if you want to check the authorize , you may wirte the logic for yourself.
        return true;
    }
    
    public function assembling()
    {
        // the parameters assembling ,
        // before they were injected to controller,you may wang to assemble the parameters 
        
        // if the request parameters is an array[1,2,3];
        
        $client = ['web','ios','android'];
        
        $data = [];
        foreach($this->data['client'] as $v) {
            $data[] = $client[$v];
        }
        $this->data['client'] = $data;
        
        return $this->data; 
        
        // Ok,you can get the assembled data by $request->fullData() in controller.
        // Of cause , you must inject this FormRequest into your controller.
    }
}