blue-twilight/app/Label.php

<?php

namespace App;

use App\Helpers\MiscHelper;
use Illuminate\Database\Eloquent\Model;

class Label extends Model
{
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'url_alias'
    ];

    public function generateAlias()
    {
        $this->url_alias = preg_replace('/[^a-z0-9\-]/', '-', strtolower($this->name));
    }

    public function photos()
    {
        return $this->belongsToMany(Photo::class, 'photo_labels');
    }

    public function thumbnailUrl($thumbnailName)
    {
        $photo = $this->photos()
            ->inRandomOrder()
            ->first();

        if (!is_null($photo))
        {
            return $photo->album->getAlbumSource()->getUrlToPhoto($photo, $thumbnailName);
        }

        // Rotate standard images
        $images = [
            asset('themes/base/images/empty-album-1.jpg'),
            asset('themes/base/images/empty-album-2.jpg'),
            asset('themes/base/images/empty-album-3.jpg')
        ];
        return $images[rand(0, count($images) - 1)];
    }

    public function url()
    {
        return route('viewLabel', $this->url_alias);
    }
}