Artisan::resolve('App\Commands\Whitelist');

<?php namespace App\Commands;

use Illuminate\Console\Command;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Input\InputArgument;
use App\Repositories\DataRepositoryInterface;

class Whitelist extends Command {

    protected $name = 'app:whitelist';

    protected $dataRepository;

    protected $description = 'Whitelist an IP address to the app.';

    public function __construct(DataRepositoryInterface $dataRepository)
    {
        parent::__construct();

        $this->dataRepository = $dataRepository;
    }

    public function fire()
    {
        echo $this->argument('ip');
    }

    protected function getArguments()
    {
        return array(
            array('ip', InputArgument::REQUIRED, 'The IP address to be whitelisted.'),
        );
    }

}

[2013-12-07 22:34:54] development.ERROR: exception 'ReflectionException' with message 'Class App\Repositories\DataRepositoryInterface does not exist' in /application.dev/app/vendor/laravel/framework/src/Illuminate/Container/Container.php:522
Stack trace:
#0 application.dev/app/vendor/laravel/framework/src/Illuminate/Container/Container.php(522): ReflectionParameter->getClass()
#1 application.dev/app/vendor/laravel/framework/src/Illuminate/Container/Container.php(505): Illuminate\Container\Container->getDependencies(Array)
#2 application.dev/app/vendor/laravel/framework/src/Illuminate/Container/Container.php(416): Illuminate\Container\Container->build('App...', Array)
#3 application.dev/app/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(423): Illuminate\Container\Container->make('App...', Array)
#4 application.dev/app/vendor/laravel/framework/src/Illuminate/Container/Container.php(752): Illuminate\Foundation\Application->make('App...')
#5 application.dev/app/vendor/laravel/framework/src/Illuminate/Console/Application.php(133): Illuminate\Container\Container->offsetGet('App...')
#6 application.dev/app/vendor/laravel/framework/src/Illuminate/Support/Facades/Facade.php(208): Illuminate\Console\Application->resolve('App...')
#7 application.dev/app/app/start/artisan.php(14): Illuminate\Support\Facades\Facade::__callStatic('resolve', Array)
#8 application.dev/app/app/start/artisan.php(14): Illuminate\Support\Facades\Artisan::resolve('App...')
#9 application.dev/app/vendor/laravel/framework/src/Illuminate/Console/Application.php(62): require('/application.dev...')
#10 application.dev/app/vendor/laravel/framework/src/Illuminate/Console/Application.php(32): Illuminate\Console\Application->boot()
#11 application.dev/app/artisan(46): Illuminate\Console\Application::start(Object(Illuminate\Foundation\Application))
#12 {main} [] []

<? namespace App\Controllers;

use Controller;
use Redirect;
use App\Repositories\DataRepositoryInterface;

class FirewallController extends BaseController {

    private $dataRepository;

    public function __construct(DataRepositoryInterface $dataRepository)
    {
        $this->dataRepository = $dataRepository;
    }

    public function whitelist($ip)
    {   
        return Redirect::to('/')->withMessages(
                                                $this->
                                                dataRepository->
                                                firewall->
                                                addToWhitelist($ip)->
                                                getMessages()
                                            );

    }

}