Files
iTop/lib/symfonycasts/dynamic-forms/src/DynamicFormBuilder.php
2025-09-26 10:00:41 +02:00

588 lines
16 KiB
PHP

<?php
/*
* This file is part of the SymfonyCasts DynamicForms package.
* Copyright (c) SymfonyCasts <https://symfonycasts.com/>
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfonycasts\DynamicForms;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Form\ClearableErrorsInterface;
use Symfony\Component\Form\DataMapperInterface;
use Symfony\Component\Form\DataTransformerInterface;
use Symfony\Component\Form\Extension\Core\Type\HiddenType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormConfigInterface;
use Symfony\Component\Form\FormError;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;
use Symfony\Component\Form\FormFactoryInterface;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\RequestHandlerInterface;
use Symfony\Component\Form\ResolvedFormTypeInterface;
use Symfony\Component\PropertyAccess\PropertyPathInterface;
/**
* Wraps the normal form builder & to add addDynamic() to it.
*
* @author Ryan Weaver
*/
class DynamicFormBuilder implements FormBuilderInterface, \IteratorAggregate
{
/**
* @var DependentFieldConfig[]
*/
private array $dependentFieldConfigs = [];
/**
* The actual form that this builder is turned into.
*/
private FormInterface $form;
private array $preSetDataDependencyData = [];
private array $postSubmitDependencyData = [];
public function __construct(private FormBuilderInterface $builder)
{
$builder->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) {
$this->form = $event->getForm();
$this->preSetDataDependencyData = [];
$this->initializeListeners();
// A fake hidden field where we can "store" an error if a dependent form
// field is suddenly invalid because its previous data was invalid
// and a field it depends on just changed (e.g. user selected "Michigan"
// as a state, then the user changed "Country" from "USA" to "Mexico"
// and so now "Michigan" is invalid). In this case, we clear the error
// on the actual field, but store a "fake" error here, which won't be
// rendered, but will prevent the form from being valid.
if (!$this->form->has('__dynamic_error')) {
$this->form->add('__dynamic_error', HiddenType::class, [
'mapped' => false,
'error_bubbling' => false,
]);
}
}, 100);
$builder->addEventListener(FormEvents::POST_SUBMIT, function (FormEvent $event) {
$this->postSubmitDependencyData = [];
});
// guarantee later than core ValidationListener
$builder->addEventListener(FormEvents::POST_SUBMIT, function (FormEvent $event) {
$this->clearDataOnTransformationError($event);
}, -1);
}
public function addDependent(string $name, string|array $dependencies, callable $callback): self
{
$dependencies = (array) $dependencies;
$this->dependentFieldConfigs[] = new DependentFieldConfig($name, $dependencies, $callback);
return $this;
}
public function storePreSetDataDependencyData(FormEvent $event): void
{
$dependency = $event->getForm()->getName();
$this->preSetDataDependencyData[$dependency] = $event->getData();
$this->executeReadyCallbacks($this->preSetDataDependencyData, FormEvents::PRE_SET_DATA);
}
public function storePostSubmitDependencyData(FormEvent $event): void
{
$dependency = $event->getForm()->getName();
$this->postSubmitDependencyData[$dependency] = $event->getForm()->getData();
$this->executeReadyCallbacks($this->postSubmitDependencyData, FormEvents::POST_SUBMIT);
}
public function clearDataOnTransformationError(FormEvent $event): void
{
$form = $event->getForm();
$transformationErrorsCleared = false;
foreach ($this->dependentFieldConfigs as $dependentFieldConfig) {
if (!$form->has($dependentFieldConfig->name)) {
continue;
}
$subForm = $form->get($dependentFieldConfig->name);
if ($subForm->getTransformationFailure() && $subForm instanceof ClearableErrorsInterface) {
$subForm->clearErrors();
$transformationErrorsCleared = true;
}
}
if ($transformationErrorsCleared) {
// We've cleared the error, but the bad data remains on the field.
// We need to make sure that the form doesn't submit successfully,
// but we also don't want to render a validation error on any field.
// So, we jam the error into a hidden field, which doesn't render errors.
if ($form->get('__dynamic_error')->isValid()) {
$form->get('__dynamic_error')->addError(new FormError('Some dynamic fields have errors.'));
}
}
}
private function executeReadyCallbacks(array $availableDependencyData, string $eventName): void
{
foreach ($this->dependentFieldConfigs as $dependentFieldConfig) {
if ($dependentFieldConfig->isReady($availableDependencyData, $eventName)) {
$dynamicField = $dependentFieldConfig->execute($availableDependencyData, $eventName);
$name = $dependentFieldConfig->name;
if (!$dynamicField->shouldBeAdded()) {
$this->form->remove($name);
continue;
}
$this->builder->add($name, $dynamicField->getType(), $dynamicField->getOptions());
$this->initializeListeners([$name]);
// auto initialize mimics FormBuilder::getForm() behavior
$field = $this->builder->get($name)->setAutoInitialize(false)->getForm();
$this->form->add($field);
}
}
}
private function initializeListeners(?array $fieldsToConsider = null): void
{
$registeredFields = [];
foreach ($this->dependentFieldConfigs as $dynamicField) {
foreach ($dynamicField->dependencies as $dependency) {
if ($fieldsToConsider && !\in_array($dependency, $fieldsToConsider)) {
continue;
}
// skip dependencies that are possibly not *yet* part of the form
if (!$this->builder->has($dependency)) {
continue;
}
if (\in_array($dependency, $registeredFields)) {
continue;
}
$registeredFields[] = $dependency;
$this->builder->get($dependency)->addEventListener(FormEvents::PRE_SET_DATA, [$this, 'storePreSetDataDependencyData']);
$this->builder->get($dependency)->addEventListener(FormEvents::POST_SUBMIT, [$this, 'storePostSubmitDependencyData']);
}
}
}
/*
* ----------------------------------------
*
* Pure decoration methods below.
*
* ----------------------------------------
*/
public function count(): int
{
return $this->builder->count();
}
/**
* @param string|FormBuilderInterface $child
*/
public function add($child, ?string $type = null, array $options = []): static
{
$this->builder->add($child, $type, $options);
return $this;
}
public function create(string $name, ?string $type = null, array $options = []): FormBuilderInterface
{
return $this->builder->create($name, $type, $options);
}
public function get(string $name): FormBuilderInterface
{
return $this->builder->get($name);
}
public function remove(string $name): static
{
$this->builder->remove($name);
return $this;
}
public function has(string $name): bool
{
return $this->builder->has($name);
}
public function all(): array
{
return $this->builder->all();
}
public function getForm(): FormInterface
{
return $this->builder->getForm();
}
public function addEventListener(string $eventName, callable $listener, int $priority = 0): static
{
$this->builder->addEventListener($eventName, $listener, $priority);
return $this;
}
public function addEventSubscriber(EventSubscriberInterface $subscriber): static
{
$this->builder->addEventSubscriber($subscriber);
return $this;
}
public function addViewTransformer(DataTransformerInterface $viewTransformer, bool $forcePrepend = false): static
{
$this->builder->addViewTransformer($viewTransformer, $forcePrepend);
return $this;
}
public function resetViewTransformers(): static
{
$this->builder->resetViewTransformers();
return $this;
}
public function addModelTransformer(DataTransformerInterface $modelTransformer, bool $forceAppend = false): static
{
$this->builder->addModelTransformer($modelTransformer, $forceAppend);
return $this;
}
public function resetModelTransformers(): static
{
$this->builder->resetModelTransformers();
return $this;
}
public function setAttribute(string $name, mixed $value): static
{
$this->builder->setAttribute($name, $value);
return $this;
}
public function setAttributes(array $attributes): static
{
$this->builder->setAttributes($attributes);
return $this;
}
public function setDataMapper(?DataMapperInterface $dataMapper = null): static
{
$this->builder->setDataMapper($dataMapper);
return $this;
}
public function setDisabled(bool $disabled): static
{
$this->builder->setDisabled($disabled);
return $this;
}
public function setEmptyData(mixed $emptyData): static
{
$this->builder->setEmptyData($emptyData);
return $this;
}
public function setErrorBubbling(bool $errorBubbling): static
{
$this->builder->setErrorBubbling($errorBubbling);
return $this;
}
public function setInheritData(bool $inheritData): static
{
$this->builder->setInheritData($inheritData);
return $this;
}
public function setMapped(bool $mapped): static
{
$this->builder->setMapped($mapped);
return $this;
}
public function setMethod(string $method): static
{
$this->builder->setMethod($method);
return $this;
}
/**
* @param string|PropertyPathInterface|null $propertyPath
*/
public function setPropertyPath($propertyPath): static
{
$this->builder->setPropertyPath($propertyPath);
return $this;
}
public function setRequired(bool $required): static
{
$this->builder->setRequired($required);
return $this;
}
public function setAction(?string $action): static
{
$this->builder->setAction($action);
return $this;
}
public function setCompound(bool $compound): static
{
$this->builder->setCompound($compound);
return $this;
}
public function setDataLocked(bool $locked): static
{
$this->builder->setDataLocked($locked);
return $this;
}
public function setFormFactory(FormFactoryInterface $formFactory): static
{
$this->builder->setFormFactory($formFactory);
return $this;
}
public function setType(?ResolvedFormTypeInterface $type): static
{
$this->builder->setType($type);
return $this;
}
public function setRequestHandler(?RequestHandlerInterface $requestHandler): static
{
$this->builder->setRequestHandler($requestHandler);
return $this;
}
public function getAttribute(string $name, mixed $default = null): mixed
{
return $this->builder->getAttribute($name, $default);
}
public function hasAttribute(string $name): bool
{
return $this->builder->hasAttribute($name);
}
public function getAttributes(): array
{
return $this->builder->getAttributes();
}
public function getDataMapper(): ?DataMapperInterface
{
return $this->builder->getDataMapper();
}
public function getEventDispatcher(): EventDispatcherInterface
{
return $this->builder->getEventDispatcher();
}
public function getName(): string
{
return $this->builder->getName();
}
public function getPropertyPath(): ?PropertyPathInterface
{
return $this->builder->getPropertyPath();
}
public function getRequestHandler(): RequestHandlerInterface
{
return $this->builder->getRequestHandler();
}
public function getType(): ResolvedFormTypeInterface
{
return $this->builder->getType();
}
public function setByReference(bool $byReference): static
{
$this->builder->setByReference($byReference);
return $this;
}
public function setData(mixed $data): static
{
$this->builder->setData($data);
return $this;
}
public function setAutoInitialize(bool $initialize): static
{
$this->builder->setAutoInitialize($initialize);
return $this;
}
public function getFormConfig(): FormConfigInterface
{
return $this->builder->getFormConfig();
}
public function setIsEmptyCallback(?callable $isEmptyCallback): static
{
$this->builder->setIsEmptyCallback($isEmptyCallback);
return $this;
}
public function getMapped(): bool
{
return $this->builder->getMapped();
}
public function getByReference(): bool
{
return $this->builder->getByReference();
}
public function getInheritData(): bool
{
return $this->builder->getInheritData();
}
public function getCompound(): bool
{
return $this->builder->getCompound();
}
public function getViewTransformers(): array
{
return $this->builder->getViewTransformers();
}
public function getModelTransformers(): array
{
return $this->builder->getModelTransformers();
}
public function getRequired(): bool
{
return $this->builder->getRequired();
}
public function getDisabled(): bool
{
return $this->builder->getDisabled();
}
public function getErrorBubbling(): bool
{
return $this->builder->getErrorBubbling();
}
public function getEmptyData(): mixed
{
return $this->builder->getEmptyData();
}
public function getData(): mixed
{
return $this->builder->getData();
}
public function getDataClass(): ?string
{
return $this->builder->getDataClass();
}
public function getDataLocked(): bool
{
return $this->builder->getDataLocked();
}
public function getFormFactory(): FormFactoryInterface
{
return $this->builder->getFormFactory();
}
public function getAction(): string
{
return $this->builder->getAction();
}
public function getMethod(): string
{
return $this->builder->getMethod();
}
public function getAutoInitialize(): bool
{
return $this->builder->getAutoInitialize();
}
public function getOptions(): array
{
return $this->builder->getOptions();
}
public function hasOption(string $name): bool
{
return $this->builder->hasOption($name);
}
public function getOption(string $name, mixed $default = null): mixed
{
return $this->builder->getOption($name, $default);
}
public function getIsEmptyCallback(): ?callable
{
return $this->builder->getIsEmptyCallback();
}
public function getIterator(): \Traversable
{
return $this->builder;
}
}