Romm\Formz\Middleware\Item\Step\Service\StepMiddlewareService

Complexity

Total Complexity

21

Size/Duplication

Total Lines	230
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	17

Importance

Changes

0

10 Methods

Rating	Name	Duplication	Size	Complexity
A	stepIsValid()	0	16	2
A	reset()	0	4	1
A	markStepAsValidated()	0	5	1
A	addValidatedFields()	0	4	1
B	getFirstInvalidStep()	0	54	7
A	redirectToStep()	0	13	1
A	getStepDefinition()	0	16	4
B	validateStep()	0	26	1
A	getStepPersistence()	0	10	2
A	getFirstStepDefinition()	0	4	1

<?php
/*
 * 2017 Romain CANON <romain.hydrocanon@gmail.com>
 *
 * This file is part of the TYPO3 FormZ project.
 * It is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License, either
 * version 3 of the License, or any later version.
 *
 * For the full copyright and license information, see:
 * http://www.gnu.org/licenses/gpl-3.0.html
 */

namespace Romm\Formz\Middleware\Item\Step\Service;

use Romm\Formz\Core\Core;
use Romm\Formz\Error\FormResult;
use Romm\Formz\Form\Definition\Step\Step\Step;
use Romm\Formz\Form\Definition\Step\Step\StepDefinition;
use Romm\Formz\Form\FormObject\FormObject;
use Romm\Formz\Form\FormObject\FormObjectFactory;
use Romm\Formz\Form\FormObject\Service\Step\FormStepPersistence;
use Romm\Formz\Middleware\Item\FormValidation\FormValidationMiddlewareOption;
use Romm\Formz\Middleware\Request\Redirect;
use Romm\Formz\Service\Traits\SelfInstantiateTrait;
use Romm\Formz\Validation\Validator\Form\AbstractFormValidator;
use TYPO3\CMS\Core\SingletonInterface;
use TYPO3\CMS\Extbase\Property\PropertyMapper;

/**
 * This service allows extended form steps manipulation.
 */
class StepMiddlewareService implements SingletonInterface
{
    use SelfInstantiateTrait;

    /**
     * @var FormObject
     */
    protected $formObject;

    /**
     * @var FormStepPersistence
     */
    protected $formStepPersistence;

    /**
     * @param FormObject $formObject
     */
    public function reset(FormObject $formObject)
    {
        $this->formObject = $formObject;
    }

    /**
     * Marks the given step as validated: no errors were found during validation
     * with the given values array.
     *
     * @param Step  $step
     * @param array $formValues
     */
    public function markStepAsValidated(Step $step, array $formValues)
    {
        $this->getStepPersistence()->markStepAsValidated($step);
        $this->getStepPersistence()->addStepFormValues($step, $formValues);
    }

    /**
     * @param array $validatedFields
     */
    public function addValidatedFields(array $validatedFields)
    {
        $this->getStepPersistence()->addValidatedFields($validatedFields);
    }

    /**
     * Checks that the previous step has already been validated, meaning the
     * user has the right to stand in the given step.
     *
     * @param Step $step
     * @return bool
     */
    public function stepIsValid(Step $step)
    {
        $stepDefinition = $this->getStepDefinition($step);

        if (false === $stepDefinition->hasPreviousDefinition()) {
            /*
             * No previous step definition found: the user stands on the first
             * step, it always has the right to stand there.
             */
            return true;
        }

        $previousStep = $stepDefinition->getPreviousDefinition()->getStep();

        return $this->getStepPersistence()->stepWasValidated($previousStep);
    }

    /**
     * Searches for the first invalid step among previous steps from the given
     * step.
     *
     * All previous steps are listed, then for each one we check if submitted
     * form values has been saved in the step persistence, in which case the
     * step validation is launched again with the current form configuration.
     *
     * @param Step $step
     * @return Step|null
     */
    public function getFirstInvalidStep(Step $step)
    {
        $firstStep = $this->getFirstStepDefinition()->getStep();

        if ($step === $firstStep) {
            /*
             * The first step is always valid.
             */
            return null;
        }

        /*
         * If there is no form instance, and the request is not in the first
         * step, obviously the user should not be there.
         */
        if (false === $this->formObject->hasForm()) {
            return $firstStep;
        }

        /** @var StepDefinition[] $stepDefinitionsToTest */
        $stepDefinitionsToTest = [];
        $invalidStep = null;
        $stepDefinition = $this->getStepDefinition($step);

        while ($stepDefinition->hasPreviousDefinition()) {
            $stepDefinition = $stepDefinition->getPreviousDefinition();
            array_unshift($stepDefinitionsToTest, $stepDefinition);
        }

        foreach ($stepDefinitionsToTest as $stepDefinition) {
            $step = $stepDefinition->getStep();

            /*
             * If the already submitted form values are not found, the step is
             * considered as invalid.
             */
            if (false === $this->getStepPersistence()->hasStepFormValues($step)) {
                $invalidStep = $step;
                break;
            }

            $result = $this->validateStep($step);

            if ($result->hasErrors()) {
                $invalidStep = $step;
                break;
            } else {
                $this->getStepPersistence()->markStepAsValidated($step);
                $this->getStepPersistence()->addValidatedFields($result->getValidatedFields());
            }
        }

        return $invalidStep;
    }

    /**
     * Redirects the current request to the given step.
     *
     * @param Step     $step
     * @param Redirect $redirect
     */
    public function redirectToStep(Step $step, Redirect $redirect)
    {
        $redirect->toPage($step->getPageUid())
            ->toExtension($step->getExtension())
            ->toController($step->getController())
            ->toAction($step->getAction())
            ->withArguments([
                'fz-hash' => [
                    $this->formObject->getName() => $this->formObject->getFormHash()
                ]
            ])
            ->dispatch();
    }

    /**
     * @param Step $step
     * @return StepDefinition|null
     */
    public function getStepDefinition(Step $step)
    {
        $stepDefinition = $this->getFirstStepDefinition();

        while ($stepDefinition) {
            if ($stepDefinition->getStep() === $step) {
                return $stepDefinition;
            }

            $stepDefinition = $stepDefinition->hasNextSteps()
                ? $stepDefinition->getNextSteps()->getDefaultStep()
                : null;
        }

        return null;
    }

    /**
     * Validates (again) the given step with the form data that were previously
     * submitted and fetched from the step persistence.
     *
     * @param Step $step
     * @return FormResult
     */
    protected function validateStep(Step $step)
    {
        /** @var FormValidationMiddlewareOption $formValidationMiddlewareOptions */
        $formValidationMiddlewareOptions = $this->formObject
            ->getDefinition()
            ->getPresetMiddlewares()
            ->getFormValidationMiddleware()
            ->getOptions();

        /** @var AbstractFormValidator $validator */
        $validator = Core::instantiate(
            $formValidationMiddlewareOptions->getFormValidatorClassName(),
            [
                'name'  => $this->formObject->getName(),
                'dummy' => true
            ]
        );

        $validator->getDataObject()->setValidatedStep($step);

        /** @var PropertyMapper $propertyMapper */
        $propertyMapper = Core::instantiate(PropertyMapper::class);
        $form = $propertyMapper->convert($this->getStepPersistence()->getStepFormValues($step), $this->formObject->getClassName());

        return $validator->validate($form);
    }

    /**
     * @return FormStepPersistence
     */
    protected function getStepPersistence()
    {
        if (null === $this->formStepPersistence) {
            $proxy = FormObjectFactory::get()->getProxy($this->formObject->getForm());

            $this->formStepPersistence = $proxy->getStepPersistence();
        }

        return $this->formStepPersistence;
    }

    /**
     * @return StepDefinition
     */
    protected function getFirstStepDefinition()
    {
        return $this->formObject->getDefinition()->getSteps()->getFirstStepDefinition();
    }
}