blue-twilight/app/Http/Controllers/Gallery/AlbumController.php

<?php

namespace App\Http\Controllers\Gallery;

use App\Album;
use App\Facade\Theme;
use App\Facade\UserConfig;
use App\Helpers\ConfigHelper;
use App\Helpers\DbHelper;
use App\Http\Controllers\Controller;
use App\Http\Requests;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\App;
use Illuminate\Support\Facades\DB;

class AlbumController extends Controller
{
    public function index(Request $request, $albumUrlAlias)
    {
        $album = DbHelper::getAlbumByAlias($albumUrlAlias);
        if (is_null($album))
        {
            App::abort(404);
            return null;
        }

        $this->authorizeForUser($this->getUser(), 'view', $album);

        $validViews = UserConfig::allowedAlbumViews();
        $requestedView = strtolower($request->get('view'));
        if (!in_array($requestedView, $validViews))
        {
            $requestedView = $album->default_view;

            if (!in_array($requestedView, $validViews))
            {
                $requestedView = $validViews[0];
            }
        }

        if ($album->photos()->count() == 0)
        {
            $requestedView = 'empty';
            $photos = [];
        }
        else if ($requestedView != 'slideshow')
        {
            $photos = $album->photos()
                ->orderBy(DB::raw('COALESCE(taken_at, created_at)'))
                ->paginate(UserConfig::get('items_per_page'));
        }
        else
        {
            // The slideshow view needs access to all photos, not paged
            $photos = $album->photos()
                ->orderBy(DB::raw('COALESCE(taken_at, created_at)'))
                ->get();
        }

        DB::transaction(function () use ($album) {
            $album->hits++;
            $album->save();
        });

        return Theme::render(sprintf('gallery.album_%s', $requestedView), [
            'album' => $album,
            'allowed_views' => $validViews,
            'current_view' => $requestedView,
            'photos' => $photos
        ]);
    }
}