old_Action.php

    /**
     * @param EgnyteState $stateModel
     *
     * @return \Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function index(EgnyteState $stateModel)
    {     
        if (Auth::getUser()->isEditingDocument()) {
            sleep(2);

            if (Auth::getUser()->isEditingDocument()) {
                throw new ConflictHttpException(trans('editing.simultaneous_editing'));
            }
        }

        Auth::getUser()->markAsEditingDocument();

        $egnyteDocumentSize = Auth::getUser()->egnyte()->getFileInfo($stateModel->egnyteDocumentToEdit->getDocumentPath())->getSize();

        // STEP 2: CHECK IF THE DOCUMENT IS LESS 20 MB
        if ($egnyteDocumentSize > config('editing.max_file_size.b')) {
            throw new BadRequestHttpException(trans('editing.too_big_document'), null, ExceptionCodes::TOO_BIG_DOCUMENT);
        }

        // STEP 1: DOWNLOAD THE DOCUMENT FROM EGNYTE
        $documentFilePath = Auth::getUser()->egnyte()->downloadFileAsTempFile(
            $stateModel->egnyteDocumentToEdit->getDocumentPath()
        );

        // STEP 3: CHECK IF THE DOCUMENT HAS LESS THAN 150 PAGES
        if (get_pdf_page_count($documentFilePath) > config('editing.max_page_count.pdf')) {
            throw new BadRequestHttpException(trans('editing.too_many_pages'), null, ExceptionCodes::TOO_MANY_PAGES);
        }

        // STEP 4: UPLOAD THE DOCUMENT TO PDFFILLER
        $documentFileUrl = InternetAccessibleFileMaker::one($documentFilePath, true);
        $documentRepresentation = Auth::getUser()->pdffiller()->documentUploader()->uploadByUrl($documentFileUrl);

        // STEP 5: GET THE URL FOR EDITING THE DOCUMENT
        $urlForOpeningPDFfillerEditor = Auth::getUser()->pdffiller()->urlsForEditingProvider()->getUrlForEditingDocument(
            $documentRepresentation
        );

        // STEP 6: PDFFILLER DOCUMENT ID TO THE STATE
        $stateModel->egnyteDocumentToEdit->setPdffillerDocumentId($documentRepresentation->getId());
        $stateModel->egnyteDocumentToEdit->save();

        JavaScriptFacade::put([
            'state' => $stateModel->getState(),
            'exceptionCodes' => ExceptionCodes::asArray(),
        ]);

        $stateModel->setStatus($stateModel::STATUS_PROCESSING);
        $stateModel->save();

        if (config('app.debug', true) === false) {
            unlink(public_path('files/' . basename($documentFilePath)));
        }

        return view('editing.index', [
            'url' => $urlForOpeningPDFfillerEditor,
            'state' => $stateModel->getState()
        ]);
    }