itstructure / yii2-template-simple

traits/ThumbnailTrait.php

<?php

namespace app\traits;

use yii\helpers\Html;
use yii\db\ActiveRecord;
use Itstructure\MFUploader\Module as MFUModule;
use Itstructure\MFUploader\models\{Mediafile, OwnerMediafile};

/**
 * Class ThumbnailTrait
 *
 * @package app\traits
 */
trait ThumbnailTrait
{
    /**
     * @var array|null|ActiveRecord|Mediafile
     */
    protected $thumbnailModel;

    /**
     * Get album thumb image.
     *
     * @param array  $options
     *
     * @return mixed
     */
    public function getDefaultThumbImage(array $options = [])
    {
        $url = $this->getDefaultThumbUrl();

        if (empty($url)) {
            return null;
        }

        if (empty($options['alt'])) {
            $options['alt'] = $this->thumbnailModel->alt;
        }

        return Html::img($url, $options);
    }

    /**
     * Get default url to thumbnail file.
     *
     * @return null|string
     */
    public function getDefaultThumbUrl()
    {
        if (null == $this->getThumbnailModel()){
            return null;
        }

        return $this->thumbnailModel->getThumbUrl(MFUModule::THUMB_ALIAS_DEFAULT);

The method getThumbUrl() does not exist on null.

    }

    /**
     * Get model's thumbnail.
     *
     * @return array|null|\yii\db\ActiveRecord|Mediafile
     */
    public function getThumbnailModel()
    {
        if (null === $this->id) {
            return null;
        }

        if ($this->thumbnailModel === null) {
            $this->thumbnailModel = OwnerMediafile::getOwnerThumbnail($this->tableName(), $this->id);

It seems like tableName() must be provided by classes using this trait. How about adding it as abstract method to this trait?

        }

        return $this->thumbnailModel;
    }
}