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<?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\UnexpectedTypeException;
use Symfony\Component\Form\Guess\Guess;
use Symfony\Component\Form\Guess\TypeGuess;
use Symfony\Component\Form\Guess\ValueGuess;
class FormTypeGuesserChain implements FormTypeGuesserInterface
{
private array $guessers = [];
/**
* @param FormTypeGuesserInterface[] $guessers
*
* @throws UnexpectedTypeException if any guesser does not implement FormTypeGuesserInterface
*/
public function __construct(iterable $guessers)
{
$tmpGuessers = [];
foreach ($guessers as $guesser) {
if (!$guesser instanceof FormTypeGuesserInterface) {
throw new UnexpectedTypeException($guesser, FormTypeGuesserInterface::class);
}
if ($guesser instanceof self) {
$tmpGuessers[] = $guesser->guessers;
} else {
$tmpGuessers[] = [$guesser];
}
}
$this->guessers = array_merge([], ...$tmpGuessers);
}
public function guessType(string $class, string $property): ?TypeGuess
{
return $this->guess(static fn ($guesser) => $guesser->guessType($class, $property));
}
public function guessRequired(string $class, string $property): ?ValueGuess
{
return $this->guess(static fn ($guesser) => $guesser->guessRequired($class, $property));
}
public function guessMaxLength(string $class, string $property): ?ValueGuess
{
return $this->guess(static fn ($guesser) => $guesser->guessMaxLength($class, $property));
}
public function guessPattern(string $class, string $property): ?ValueGuess
{
return $this->guess(static fn ($guesser) => $guesser->guessPattern($class, $property));
}
/**
* Executes a closure for each guesser and returns the best guess from the
* return values.
*
* @param \Closure $closure The closure to execute. Accepts a guesser
* as argument and should return a Guess instance
*/
private function guess(\Closure $closure): ?Guess
{
$guesses = [];
foreach ($this->guessers as $guesser) {
if ($guess = $closure($guesser)) {
$guesses[] = $guess;
}
}
return Guess::getBestGuess($guesses);
}
}