core/app/Widgets/OrbitSlider/OrbitSlider.php

<?php
namespace App\Widgets\OrbitSlider;

use App\Models\Directory;
use App\Models\Widget;
use App\Widgets\Contracts\PublicWidget;
use App\Widgets\Contracts\WidgetRenderer;
use App\Widgets\Exceptions\WidgetExistsException;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Storage;

class OrbitSlider implements PublicWidget
{
    const DIRECTORY_NAME = 'orbit-slider-data';
    const CONFIG_FILENAME = 'orbit-slider-directory-id';

    /**
     * Name getter
     *
     * @return string
     */
    public static function getName()
    {
        return 'widgets/orbitSlider.widgetName';
    }

    /**
     * Getter for description
     *
     * @return string
     */
    public static function getDescription()
    {
        return 'widgets/orbitSlider.widgetDescription';
    }

    /**
     * @param $name
     * @param $directoryId
     * @param $parentDirectoryId
     *
     * @throws WidgetExistsException
     */
    protected static function checkIfDirectoryExists($name, $directoryId, $parentDirectoryId)
    {
        // check if directory does not exists
        $exists = Directory::where('name', $name)
                           ->where('parent_id', $parentDirectoryId);

        // if widget has some directory set, we are performing edit
        if ($directoryId) {
            $exists = $exists->where('id', '!=', $directoryId);
        }

        if ($exists->exists()) {
            throw new WidgetExistsException($name);
        }
    }

    /**
     * @param Widget    $widget
     * @param \stdClass $data
     *
     * @throws WidgetExistsException
     *
     * @return Widget
     */
    public static function save(Widget $widget, \stdClass $data)
    {
        $settings = json_decode($widget->settings);
        $parentDirectoryId = Storage::get(self::CONFIG_FILENAME);
        $directoryId = isset($settings->directoryId) ? $settings->directoryId : null;

        if (!isset($data->useExistingDirectory)) {
            // check if name with same name does not exists yet
            self::checkIfDirectoryExists($data->name, $directoryId, $parentDirectoryId);

            // setup some information about directory
            $directory = $directoryId ? Directory::find($directoryId) : new Directory;

            // setup some info when creating new directory
            if (!$directoryId) {
                $directory->user_id = Auth::user()->id;
                $directory->parent_id = $parentDirectoryId;
            }

            // common info both for edit and creation
            $directory->name = $data->name;
            $directory->description = $data->description;

            // save into database
            $directory->save();

            $directoryId = $directory->id;
        } else {
            $directoryId = $data->directoryId;
        }

        $settings = [
            'directoryId'         => $directoryId,
            'imagePerSlide'       => isset($data->imagePerSlide) ? $data->imagePerSlide : 4,
            'displayBullets'      => isset($data->displayBullets),
            'sliderClass'         => isset($data->containerClass) ? $data->containerClass : '',
            'slideContainerClass' => isset($data->slideContainerClass) ? $data->slideContainerClass : '',
            'code'                => isset($data->code) ? $data->code : ''
        ];

        self::checkSettings($settings);

        $widget->settings = json_encode($settings);;

        return $widget;
    }

    /**
     * Method for populating settings array with default values
     *
     * @param $settings
     */
    public static function checkSettings(&$settings)
    {
        if (!is_object($settings)) {
            $settings = (object)$settings;
        }

        if (!isset($settings->slideContainerClass)) {
            $settings->slideContainerClass = '';
        }

        if (!isset($settings->displayBullets)) {
            $settings->displayBullets = true;
        }

        if (!isset($settings->imagePerSlide)) {
            $settings->imagePerSlide = 4;
        }

        if (!isset($settings->directoryId)) {
            $settings->directoryId = false;
        }
        if (!isset($settings->sliderClass)) {
            $settings->sliderClass = '';
        }
        if (!isset($settings->code)) {
            $settings->code = '';
        }
    }

    /**
     * Getter for presenter/renderer of this widget
     *
     * @return WidgetRenderer
     */
    public static function getPresenter()
    {
        return Presenters\OrbitSlider::class;
    }

    /**
     * Function for installing given widget
     *
     * @return mixed
     */
    public static function install()
    {
        $directory = Directory::where('name', self::DIRECTORY_NAME)
                              ->first();

        if (!count($directory)) {
            $directory = Directory::create([
                                               'name'   => self::DIRECTORY_NAME,
                                               'hidden' => true
                                           ]);
        }

        Storage::put(self::CONFIG_FILENAME, $directory->id);
    }

    /**
     * Function for uninstalling widget
     */
    public static function uninstall()
    {
        // TODO: Implement uninstall() method.
    }
}