vendor/symfony/form/FormErrorIterator.php line 38
<?php/** This file is part of the Symfony package.** (c) Fabien Potencier <fabien@symfony.com>** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Symfony\Component\Form;use Symfony\Component\Form\Exception\BadMethodCallException;use Symfony\Component\Form\Exception\InvalidArgumentException;use Symfony\Component\Form\Exception\LogicException;use Symfony\Component\Form\Exception\OutOfBoundsException;use Symfony\Component\Validator\ConstraintViolation;/*** Iterates over the errors of a form.** This class supports recursive iteration. In order to iterate recursively,* pass a structure of {@link FormError} and {@link FormErrorIterator} objects* to the $errors constructor argument.** You can also wrap the iterator into a {@link \RecursiveIteratorIterator} to* flatten the recursive structure into a flat list of errors.** @author Bernhard Schussek <bschussek@gmail.com>** @template T of FormError|FormErrorIterator** @implements \ArrayAccess<int, T>* @implements \RecursiveIterator<int, T>* @implements \SeekableIterator<int, T>*/class FormErrorIterator implements \RecursiveIterator, \SeekableIterator, \ArrayAccess, \Countable{/*** The prefix used for indenting nested error messages.*/public const INDENTATION = ' ';private FormInterface $form;/*** @var list<T>*/private array $errors;/*** @param list<T> $errors** @throws InvalidArgumentException If the errors are invalid*/public function __construct(FormInterface $form, array $errors){foreach ($errors as $error) {if (!($error instanceof FormError || $error instanceof self)) {throw new InvalidArgumentException(sprintf('The errors must be instances of "Symfony\Component\Form\FormError" or "%s". Got: "%s".', __CLASS__, get_debug_type($error)));}}$this->form = $form;$this->errors = $errors;}/*** Returns all iterated error messages as string.*/public function __toString(): string{$string = '';foreach ($this->errors as $error) {if ($error instanceof FormError) {$string .= 'ERROR: '.$error->getMessage()."\n";} else {/* @var self $error */$string .= $error->getForm()->getName().":\n";$string .= self::indent((string) $error);}}return $string;}/*** Returns the iterated form.*/public function getForm(): FormInterface{return $this->form;}/*** Returns the current element of the iterator.** @return T An error or an iterator containing nested errors*/public function current(): FormError|self{return current($this->errors);}/*** Advances the iterator to the next position.*/public function next(): void{next($this->errors);}/*** Returns the current position of the iterator.*/public function key(): int{return key($this->errors);}/*** Returns whether the iterator's position is valid.*/public function valid(): bool{return null !== key($this->errors);}/*** Sets the iterator's position to the beginning.** This method detects if errors have been added to the form since the* construction of the iterator.*/public function rewind(): void{reset($this->errors);}/*** Returns whether a position exists in the iterator.** @param int $position The position*/public function offsetExists(mixed $position): bool{return isset($this->errors[$position]);}/*** Returns the element at a position in the iterator.** @param int $position The position** @return T** @throws OutOfBoundsException If the given position does not exist*/public function offsetGet(mixed $position): FormError|self{if (!isset($this->errors[$position])) {throw new OutOfBoundsException('The offset '.$position.' does not exist.');}return $this->errors[$position];}/*** Unsupported method.** @throws BadMethodCallException*/public function offsetSet(mixed $position, mixed $value): void{throw new BadMethodCallException('The iterator doesn\'t support modification of elements.');}/*** Unsupported method.** @throws BadMethodCallException*/public function offsetUnset(mixed $position): void{throw new BadMethodCallException('The iterator doesn\'t support modification of elements.');}/*** Returns whether the current element of the iterator can be recursed* into.*/public function hasChildren(): bool{return current($this->errors) instanceof self;}public function getChildren(): self{if (!$this->hasChildren()) {throw new LogicException(sprintf('The current element is not iterable. Use "%s" to get the current element.', self::class.'::current()'));}/** @var self $children */$children = current($this->errors);return $children;}/*** Returns the number of elements in the iterator.** Note that this is not the total number of errors, if the constructor* parameter $deep was set to true! In that case, you should wrap the* iterator into a {@link \RecursiveIteratorIterator} with the standard mode* {@link \RecursiveIteratorIterator::LEAVES_ONLY} and count the result.** $iterator = new \RecursiveIteratorIterator($form->getErrors(true));* $count = count(iterator_to_array($iterator));** Alternatively, set the constructor argument $flatten to true as well.** $count = count($form->getErrors(true, true));*/public function count(): int{return \count($this->errors);}/*** Sets the position of the iterator.** @throws OutOfBoundsException If the position is invalid*/public function seek(int $position): void{if (!isset($this->errors[$position])) {throw new OutOfBoundsException('The offset '.$position.' does not exist.');}reset($this->errors);while ($position !== key($this->errors)) {next($this->errors);}}/*** Creates iterator for errors with specific codes.** @param string|string[] $codes The codes to find*/public function findByCodes(string|array $codes): static{$codes = (array) $codes;$errors = [];foreach ($this as $error) {$cause = $error->getCause();if ($cause instanceof ConstraintViolation && \in_array($cause->getCode(), $codes, true)) {$errors[] = $error;}}return new static($this->form, $errors);}/*** Utility function for indenting multi-line strings.*/private static function indent(string $string): string{return rtrim(self::INDENTATION.str_replace("\n", "\n".self::INDENTATION, $string), ' ');}}