AbstractModelFormFactory.php

<?php
namespace TYPO3\Form\Factory;

/*                                                                        *
 * This script belongs to the FLOW3 package "TYPO3.Form".                 *
 *                                                                        *
 * It is free software; you can redistribute it and/or modify it under    *
 * the terms of the GNU Lesser General Public License, either version 3   *
 *  of the License, or (at your option) any later version.                *
 *                                                                        *
 * The TYPO3 project - inspiring people to share!                         *
 *                                                                        */

use TYPO3\FLOW3\Annotations as FLOW3;
use TYPO3\Form\Core\Model\FormDefinition;
use TYPO3\FLOW3\Validation\Validator as Validator;

/**
 * TODO documentation, @api annotation(?)
 */
abstract class AbstractModelFormFactory extends AbstractFormFactory {

	/**
	 * @FLOW3\Inject
	 * @var \TYPO3\FLOW3\Reflection\ReflectionService
	 */
	protected $reflectionService;

	/**
	 * @FLOW3\Inject
	 * @var \TYPO3\FLOW3\Validation\ValidatorResolver
	 */
	protected $validatorResolver;

	/**
	 * @FLOW3\Inject
	 * @var \TYPO3\FLOW3\Persistence\PersistenceManagerInterface
	 */
	protected $persistenceManager;

	/**
	 * @var FormDefinition
	 */
	protected $formDefinition;

	/**
	 * @var array
	 */
	protected $configuration = array();

	/**
	 * @var string
	 */
	protected $objectPrefix = 'object';

	/**
	 * @var object
	 */
	protected $targetObject = NULL;

	/**
	 * @param array $configuration factory-specific configuration array
	 * @param string $presetName The name of the "Form Preset" to use; it is factory-specific to implement this.
	 * @return \TYPO3\Form\Core\Model\FormDefinition a newly built form definition
	 * @throws \TYPO3\Form\Exception
	 */
	public function build(array $configuration, $presetName) {

			// merge preset configuration with specified $configuration ("overrideConfiguration" argument of the render ViewHelper)
		$this->configuration = \TYPO3\FLOW3\Utility\Arrays::arrayMergeRecursiveOverrule($this->getPresetConfiguration($presetName), $configuration);
		$formIdentifier = sprintf('%sForm', $this->objectPrefix);
		$this->formDefinition = new FormDefinition($formIdentifier, $this->configuration);

		$page1 = $this->formDefinition->createPage('page1');

		$targetClassName = $this->getTargetClassName();

			// set $this->targetObject if specified
		if (isset($this->configuration['targetObject'])) {
			if (!$this->configuration['targetObject'] instanceof $targetClassName) {
				throw new \TYPO3\Form\Exception(sprintf('The specified targetObject must be of type "%s", given: "%s"', $targetClassName, get_class($this->configuration['targetObject'])), 1336394809);
			}
			$this->targetObject = $this->configuration['targetObject'];
		}

			// set target type for property mapping
		$this->formDefinition->getProcessingRule($this->objectPrefix)->setDataType($targetClassName);

			// allow all properties to be mapped
		$targetObjectPropertyMappingConfiguration = $this->formDefinition->getProcessingRule($this->objectPrefix)->getPropertyMappingConfiguration();
		$targetObjectPropertyMappingConfiguration->allowAllProperties();

			// set property mapping mode to modification/creation depending on $this->targetObject to be set
		if ($this->targetObject !== NULL) {
			$targetObjectPropertyMappingConfiguration->setTypeConverterOption('TYPO3\FLOW3\Property\TypeConverter\PersistentObjectConverter', \TYPO3\FLOW3\Property\TypeConverter\PersistentObjectConverter::CONFIGURATION_MODIFICATION_ALLOWED, TRUE);
			$identity = $page1->createElement($this->objectPrefix . '.__identity', 'TYPO3.Form:HiddenField');
			$identity->setDefaultValue($this->persistenceManager->getIdentifierByObject($this->targetObject));
		} else {
			$targetObjectPropertyMappingConfiguration->setTypeConverterOption('TYPO3\FLOW3\Property\TypeConverter\PersistentObjectConverter', \TYPO3\FLOW3\Property\TypeConverter\PersistentObjectConverter::CONFIGURATION_CREATION_ALLOWED, TRUE);
		}

		$this->createFormElements($page1);

			// set default values and validators from the targetClassName
		$this->setDefaultValues();
		$this->addValidators();

			// call postProcessFormValues() upon submission for further processing of the submitted values
		$self = $this;
		$this->formDefinition->createFinisher('TYPO3.Form:Closure')->setOption('closure', function(\TYPO3\Form\Core\Model\FinisherContext $context) use ($self) {
			$self->postProcessFormValues($context->getFormValues());
		});

			// add more custom finishers if required
		$this->addFinishers();

		return $this->formDefinition;
	}

	/**
	 * Implement this method and attach form elements to the $section like:
	 * $name = $section->createElement($this->objectPrefix . '.name', 'TYPO3.Form:SingleLineText');
	 * $name->setLabel('Name');
	 * ...
	 *
	 * @param \TYPO3\Form\Core\Model\AbstractSection $section
	 * @return void
	 */
	abstract protected function createFormElements(\TYPO3\Form\Core\Model\AbstractSection $section);

	/**
	 * Implement this method and return the fully qualified class name of your target object
	 * e.g. return 'My\Package\Domain\Model\SomeModel';
	 *
	 * @return string
	 */
	abstract protected function getTargetClassName();

	/**
	 * Iterates over the form elements and sets default values if possible
	 *
	 * @return void
	 */
	protected function setDefaultValues() {
		if ($this->targetObject === NULL) {
			return;
		}

		$targetClassName = $this->getTargetClassName();
		$object = $this->targetObject !== NULL ? $this->targetObject : new $targetClassName();
		foreach ($this->formDefinition->getRenderablesRecursively() as $formElement) {
			if ($formElement instanceof FormElementInterface && $formElement->getDefaultValue() === NULL) {
				$elementIdentifier = substr($formElement->getIdentifier(), strlen($this->objectPrefix) + 1);
				$formElement->setDefaultValue(ObjectAccess::getPropertyPath($object, $elementIdentifier));
			}
		}
	}

	/**
	 * Uses reflection to retrieve base validation rules for the specified targetClassName
	 *
	 * @return void
	 * @throws \TYPO3\FLOW3\Validation\Exception\NoSuchValidatorException
	 */
	protected function addValidators() {
		$targetClassName = $this->getTargetClassName();
		foreach ($this->reflectionService->getClassPropertyNames($targetClassName) as $classPropertyName) {
			$formElement = $this->formDefinition->getElementByIdentifier($this->objectPrefix . '.' . $classPropertyName);
			if ($formElement === NULL) {
				continue;
			}
			$validateAnnotations = $this->reflectionService->getPropertyAnnotations($targetClassName, $classPropertyName, 'TYPO3\FLOW3\Annotations\Validate');
			foreach ($validateAnnotations as $validateAnnotation) {
				$newValidator = $this->validatorResolver->createValidator($validateAnnotation->type, $validateAnnotation->options);
				if ($newValidator === NULL) {
					throw new \TYPO3\FLOW3\Validation\Exception\NoSuchValidatorException('Invalid validate annotation in ' . $this->targetClassName . '::' . $classPropertyName . ': Could not resolve class name for  validator "' . $validateAnnotation->type . '".', 1342536676);
				}
				$formElement->addValidator($newValidator);
			}
		}
	}

	/**
	 * Override this method if you want to post process the (already mapped) $formValue
	 *
	 * @param array $formValues
	 * @return void
	 */
	public function postProcessFormValues(array $formValues) {
	}

	/**
	 * Override this method if you want to add custom finishers
	 *
	 * @return void
	 */
	protected function addFinishers() {
	}

}
?>

BookFormFactory.php

<?php
namespace Test\FormFactories;

/*                                                                        *
 * This script belongs to the FLOW3 package "Yeebase.Guruhelp".           *
 *                                                                        *
 * It is free software; you can redistribute it and/or modify it under    *
 * the terms of the GNU Lesser General Public License, either version 3   *
 * of the License, or (at your option) any later version.                 *
 *                                                                        *
 * The TYPO3 project - inspiring people to share!                         *
 *                                                                        */

use TYPO3\FLOW3\Annotations as FLOW3;
use TYPO3\FLOW3\Error\Message;

class BookFormFactory extends \TYPO3\Form\Factory\AbstractModelFormFactory {

	/**
	 * @FLOW3\Inject
	 * @var \Test\Domain\Repository\BookRepository
	 */
	protected $bookRepository;

	/**
	 * @FLOW3\Inject
	 * @var \TYPO3\FLOW3\Mvc\FlashMessageContainer
	 */
	protected $flashMessageContainer;

	/**
	 * @param \TYPO3\Form\Core\Model\AbstractSection $section
	 * @return void
	 */
	protected function createFormElements(\TYPO3\Form\Core\Model\AbstractSection $section) {
		$title = $section->createElement($this->objectPrefix . '.title', 'TYPO3.Form:SingleLineText');
		$title->setLabel('Title');

		$price = $section->createElement($this->objectPrefix . '.price', 'TYPO3.Form:SingleLineText');
		$price->setLabel('Price');
	}

	/**
	 * @return string
	 */
	protected function getTargetClassName() {
		return 'Test\Domain\Model\Book';
	}

	/**
	 * @param array $formValues
	 * @return void
	 */
	public function postProcessFormValues(array $formValues) {
		if ($this->targetObject !== NULL) {
			$this->bookRepository->update($formValues[$this->objectPrefix]);
		} else {
			$this->bookRepository->add($formValues[$this->objectPrefix]);
		}
	}

	/**
	 * @return void
	 */
	protected function addFinishers() {
		$flashMessageFinisher = $this->formDefinition->createFinisher('TYPO3.Form:FlashMessage');
		if ($this->targetObject === NULL) {
			$flashMessageFinisher->setOptions(
				array(
					'messageBody' => 'Stream "{' . $this->objectPrefix . '.title}" has been created',
					'messageTitle' => 'Stream created',
				)
			);
		} else {
			$flashMessageFinisher->setOptions(
				array(
					'messageBody' => 'Stream "{' . $this->objectPrefix . '.title}" has been updated',
					'messageTitle' => 'Stream updated',
				)
			);
		}

		$redirectFinisher = $this->formDefinition->createFinisher('TYPO3.Form:Redirect');
		$redirectFinisher->setOptions(
			array(
				'package' => 'Test',
				'controller' => 'Standard',
				'action' => 'index'
			)
		);
	}
}

?>

Edit.html

{namespace form=TYPO3\Form\ViewHelpers}
<h1>Edit book "{book.title}"</h1>
<form:render factoryClass="Test\FormFactories\TestFormFactory" overrideConfiguration="{targetObject: book}" />

Index.html

<f:flashMessages />
<ul>
	<f:for each="{books}" as="book">
		<li>
			<f:link.action action="edit" arguments="{book: book}">{book.title}</f:link.action>
		</li>
	</f:for>
</ul>
<f:link.action action="new">Add book</f:link.action>

New.html

{namespace form=TYPO3\Form\ViewHelpers}#
<h1>Create new book</h1>
<form:render factoryClass="Test\FormFactories\BookFormFactory" />

StandardController.php

<?php
namespace Test\Controller;

/*                                                                        *
 * This script belongs to the FLOW3 package "Test".                       *
 *                                                                        *
 *                                                                        */

use TYPO3\FLOW3\Annotations as FLOW3;

/**
 * Standard controller for the Test package
 *
 * @FLOW3\Scope("singleton")
 */
class StandardController extends \TYPO3\FLOW3\Mvc\Controller\ActionController {

	/**
	 * @FLOW3\Inject
	 * @var \Test\Domain\Repository\BookRepository
	 */
	protected $bookRepository;

	/**
	 * @return void
	 */
	public function indexAction() {
		$this->view->assign('books', $this->bookRepository->findAll());
	}

	/**
	 * @return void
	 */
	public function newAction() {
	}

	/**
	 * @param \Test\Domain\Model\Book $book
	 * @return void
	 */
	public function editAction(\Test\Domain\Model\Book $book) {
		$this->view->assign('book', $book);
	}

}
?>