blue-twilight/app/Providers/AppServiceProvider.php

<?php

namespace App\Providers;

use App\Album;
use App\Facade\Theme;
use App\Facade\UserConfig;
use App\Helpers\ConfigHelper;
use App\Helpers\ImageHelper;
use App\Helpers\ThemeHelper;
use Illuminate\Database\QueryException;
use Illuminate\Mail\Mailer;
use Illuminate\Support\Facades\View;
use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        $this->app->singleton('image', function($app)
        {
            return new ImageHelper();
        });
        $this->app->singleton('theme', function($app)
        {
            return new ThemeHelper();
        });
        $this->app->singleton('user_config', function($app)
        {
            return new ConfigHelper();
        });

        // When running migrations or CLI tasks, don't need to add things to the view
        if (php_sapi_name() != 'cli')
        {
            $this->addThemeInfoToView();
            $this->addAlbumsToView();
        }

        // Set the default mail configuration as per user's requirements
        $this->updateMailConfig();
    }

    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        //
    }

    private function addAlbumsToView()
    {
        $albums = Album::all()->sortBy('name');
        View::share('albums', $albums);
    }

    private function addThemeInfoToView()
    {
        $themeInfo = Theme::info();

        // Add each theme info element to the view - prefixing with theme_
        // e.g. $themeInfo['name'] becomes $theme_name in the view
        foreach ($themeInfo as $key => $value)
        {
            View::share('theme_' . $key, $value);
        }

        // Also add a theme_url key
        View::share('theme_url', sprintf('themes/%s', Theme::current()));
    }

    private function updateMailConfig()
    {
        /** @var Mailer $mailer */
        $mailer = $this->app->mailer;
        $swiftMailer = $mailer->getSwiftMailer();

        /** @var \Swift_SmtpTransport $transport */
        $transport = $swiftMailer->getTransport();
        $transport->setHost(UserConfig::get('smtp_server'));
        $transport->setPort(intval(UserConfig::get('smtp_port')));

        $username = UserConfig::get('smtp_username');
        if (!is_null($username))
        {
            $transport->setUsername($username);
        }

        $password = UserConfig::get('smtp_password');
        if (!is_null($password))
        {
            $transport->setPassword(decrypt($password));
        }

        if (UserConfig::get('smtp_encryption'))
        {
            $transport->setEncryption('tls');
        }

        $mailer->alwaysFrom(UserConfig::get('sender_address'), UserConfig::get('sender_name'));
    }
}