core/modules/ContactForm/Handlers/ContactForm.php

<?php
namespace Modules\ContactForm\Handlers;

use App\Enumerations\ModulesHandlerToId;
use App\Handlers\Handler;
use App\Http\Controllers\Admin\EditContent;
use App\Http\Controllers\Controller;
use App\Http\Requests\Request;
use App\Models\Content;
use App\Models\User;

class ContactForm extends Handler
{
    /**
     * Render given module into visitor area.
     *
     * @param Content $content    DB model from table contents
     * @param array   $parameters parameters used for modifications/custom settings of given model
     *
     * @return mixed
     */
    public function render(Content $content, $parameters)
    {
        $content->module_settings = json_decode($content->module_settings);

        return Controller::VisitorsView($content->template, ['page' => $content]);
    }

    public static function getHistoryHandler()
    {
        return ContactFormHistory::class;
    }

    /**
     * Save module-specific values into database
     *
     * @param Content $content
     * @param Request $request
     *
     * @return mixed
     * @internal param Widget $widget
     */
    public static function createNew(Content &$content, Request $request)
    {
        $settings = [
            'phone'        => $request->phone,
            'email'        => $request->email,
            'contactEmail' => $request->ContactEmail,
            'companyName'  => $request->companyName,
            'address'      => $request->address,
            'gpsLat'       => $request->gpsLat,
            'gpsLng'       => $request->gpsLng,
        ];

        // save settings
        $content->module_settings = json_encode($settings);
    }

    /**
     * Method used for editing existing content page.
     *
     * Reason why it is separated from createNew() method is simple - we need to save history of changes.
     *
     * @param Content $content
     * @param Request $request
     *
     * @param         $revisionID string ID of revision used
     *
     * @return int number of edited fields
     */
    public static function edit(Content &$content, Request $request, $revisionID)
    {
        $fields = [
            'phone'        => 'phone',
            'email'        => 'email',
            'contactEmail' => 'contactEmail',
            'companyName'  => 'companyName',
            'address'      => 'address',
            'gpsLat'       => 'gpsLat',
            'gpsLng'       => 'gpsLng',
        ];

        // get data and try to save them
        $data = EditContent::getFields($request, $fields);
        list($revision, $changedColumns) = $content->updateWithHistory($fields, $data, $revisionID);

        // return amount of changed columns
        return $changedColumns;
    }

    public static function getModuleId()
    {
        $handler = config('contactform.handler');
        $allModules = ModulesHandlerToId::getWithTranslations();
        $moduleId = isset($allModules[$handler]) ? $allModules[$handler] : null;

        return $moduleId;
    }

    /**
     * Getter for section names in creating/editing content resource
     *
     * @return mixed
     */
    public static function getExtendedFormSections()
    {
        $sections = parent::getExtendedFormSections();
        $sections['content'] = trans('contactform::admin/content.content');

        return $sections;
    }

    /**
     * Getter for views used in extended part of form for creating new content
     *
     * This method should return pairs <section, view-name>. View is returned only as name in plain text
     *
     * @return array of views/templates/html codes divided into section
     */
    public static function getExtendedFormInputsCreate()
    {
        return [
            'basicInfo'   => 'contactform::admin.form.basicInfo',
            'meta'        => 'admin.content.formParts.metaInformation',
            'appearance'  => 'admin.content.formParts.appearance',
            'publication' => 'admin.content.formParts.publicationSetup',
            'content'     => 'contactform::admin.form.content',
        ];
    }

    public static function getExtendedFormInputsEdit()
    {
        return self::getExtendedFormInputsCreate();
    }

    /**
     * Register admin menu (or multiple ones)
     *
     * This cannot be in ServiceProvider because Session is started at middleware. And ServiceProvider is called before
     * starting any middleware..
     *
     * @param User $user model of logged user
     */
    public static function registerAdminMenu(User $user)
    {
        // register links in admin menu
        $menu = \Menu::instance('mainMenu');
        $menu->dropdown(trans('contactform::admin/adminMenu.contactForm'), function ($submenu) use ($user) {
            $submenu->route('content.new', trans('contactform::admin/adminMenu.new'), ['moduleId' => self::getModuleId()], 10, ['icon' => 'fa fa-plus']);
            $submenu->route('content.overview', trans('contactform::admin/adminMenu.overview'), ['moduleId' => self::getModuleId()], 20, ['icon' => 'fa fa-list']);
            //            $submenu->route('emails.sent', trans('contactform::admin/adminMenu.sentMessages'), [], 30, ['icon' => 'fa fa-send']);
        }, 25, ['icon' => 'fa fa-envelope-o']);
    }

    /**
     * Does given module manage content? Or is it just module with widgets/something internal/something absolutely else?
     *
     * @return bool
     */
    public static function managesContent()
    {
        return true;
    }

    /**
     * Install module
     *
     * @return mixed
     */
    public static function install()
    {
        // TODO: Implement install() method.
    }

    /**
     * Load some extra data for content management form?
     *
     * @param Content $content
     *
     * @return mixed
     */
    public static function loadExtraData(Content $content)
    {
        // nothing to do
    }
}