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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\Extension\Validator;
use Symfony\Component\Form\FormTypeGuesserInterface;
use Symfony\Component\Form\Guess\Guess;
use Symfony\Component\Form\Guess\TypeGuess;
use Symfony\Component\Form\Guess\ValueGuess;
use Symfony\Component\Validator\MetadataFactoryInterface;
use Symfony\Component\Validator\Constraint;
class ValidatorTypeGuesser implements FormTypeGuesserInterface
{
private $metadataFactory;
public function __construct(MetadataFactoryInterface $metadataFactory)
{
$this->metadataFactory = $metadataFactory;
}
/**
* {@inheritDoc}
*/
public function guessType($class, $property)
{
$guesser = $this;
return $this->guess($class, $property, function (Constraint $constraint) use ($guesser) {
return $guesser->guessTypeForConstraint($constraint);
});
}
/**
* {@inheritDoc}
*/
public function guessRequired($class, $property)
{
$guesser = $this;
return $this->guess($class, $property, function (Constraint $constraint) use ($guesser) {
return $guesser->guessRequiredForConstraint($constraint);
// If we don't find any constraint telling otherwise, we can assume
// that a field is not required (with LOW_CONFIDENCE)
}, false);
}
/**
* {@inheritDoc}
*/
public function guessMaxLength($class, $property)
{
$guesser = $this;
return $this->guess($class, $property, function (Constraint $constraint) use ($guesser) {
return $guesser->guessMaxLengthForConstraint($constraint);
});
}
/**
* {@inheritDoc}
*/
public function guessPattern($class, $property)
{
$guesser = $this;
return $this->guess($class, $property, function (Constraint $constraint) use ($guesser) {
return $guesser->guessPatternForConstraint($constraint);
});
}
/**
* Guesses a field class name for a given constraint
*
* @param Constraint $constraint The constraint to guess for
*
* @return TypeGuess|null The guessed field class and options
*/
public function guessTypeForConstraint(Constraint $constraint)
{
switch (get_class($constraint)) {
case 'Symfony\Component\Validator\Constraints\Type':
switch ($constraint->type) {
case 'array':
return new TypeGuess('collection', array(), Guess::MEDIUM_CONFIDENCE);
case 'boolean':
case 'bool':
return new TypeGuess('checkbox', array(), Guess::MEDIUM_CONFIDENCE);
case 'double':
case 'float':
case 'numeric':
case 'real':
return new TypeGuess('number', array(), Guess::MEDIUM_CONFIDENCE);
case 'integer':
case 'int':
case 'long':
return new TypeGuess('integer', array(), Guess::MEDIUM_CONFIDENCE);
case '\DateTime':
return new TypeGuess('date', array(), Guess::MEDIUM_CONFIDENCE);
case 'string':
return new TypeGuess('text', array(), Guess::LOW_CONFIDENCE);
}
break;
case 'Symfony\Component\Validator\Constraints\Country':
return new TypeGuess('country', array(), Guess::HIGH_CONFIDENCE);
case 'Symfony\Component\Validator\Constraints\Date':
return new TypeGuess('date', array('input' => 'string'), Guess::HIGH_CONFIDENCE);
case 'Symfony\Component\Validator\Constraints\DateTime':
return new TypeGuess('datetime', array('input' => 'string'), Guess::HIGH_CONFIDENCE);
case 'Symfony\Component\Validator\Constraints\Email':
return new TypeGuess('email', array(), Guess::HIGH_CONFIDENCE);
case 'Symfony\Component\Validator\Constraints\File':
case 'Symfony\Component\Validator\Constraints\Image':
return new TypeGuess('file', array(), Guess::HIGH_CONFIDENCE);
case 'Symfony\Component\Validator\Constraints\Language':
return new TypeGuess('language', array(), Guess::HIGH_CONFIDENCE);
case 'Symfony\Component\Validator\Constraints\Locale':
return new TypeGuess('locale', array(), Guess::HIGH_CONFIDENCE);
case 'Symfony\Component\Validator\Constraints\Time':
return new TypeGuess('time', array('input' => 'string'), Guess::HIGH_CONFIDENCE);
case 'Symfony\Component\Validator\Constraints\Url':
return new TypeGuess('url', array(), Guess::HIGH_CONFIDENCE);
case 'Symfony\Component\Validator\Constraints\Ip':
return new TypeGuess('text', array(), Guess::MEDIUM_CONFIDENCE);
case 'Symfony\Component\Validator\Constraints\Length':
case 'Symfony\Component\Validator\Constraints\Regex':
return new TypeGuess('text', array(), Guess::LOW_CONFIDENCE);
case 'Symfony\Component\Validator\Constraints\Range':
return new TypeGuess('number', array(), Guess::LOW_CONFIDENCE);
case 'Symfony\Component\Validator\Constraints\Count':
return new TypeGuess('collection', array(), Guess::LOW_CONFIDENCE);
case 'Symfony\Component\Validator\Constraints\True':
case 'Symfony\Component\Validator\Constraints\False':
return new TypeGuess('checkbox', array(), Guess::MEDIUM_CONFIDENCE);
}
return null;
}
/**
* Guesses whether a field is required based on the given constraint
*
* @param Constraint $constraint The constraint to guess for
*
* @return ValueGuess|null The guess whether the field is required
*/
public function guessRequiredForConstraint(Constraint $constraint)
{
switch (get_class($constraint)) {
case 'Symfony\Component\Validator\Constraints\NotNull':
case 'Symfony\Component\Validator\Constraints\NotBlank':
case 'Symfony\Component\Validator\Constraints\True':
return new ValueGuess(true, Guess::HIGH_CONFIDENCE);
}
return null;
}
/**
* Guesses a field's maximum length based on the given constraint
*
* @param Constraint $constraint The constraint to guess for
*
* @return ValueGuess|null The guess for the maximum length
*/
public function guessMaxLengthForConstraint(Constraint $constraint)
{
switch (get_class($constraint)) {
case 'Symfony\Component\Validator\Constraints\Length':
if (is_numeric($constraint->max)) {
return new ValueGuess($constraint->max, Guess::HIGH_CONFIDENCE);
}
break;
case 'Symfony\Component\Validator\Constraints\Type':
if (in_array($constraint->type, array('double', 'float', 'numeric', 'real'))) {
return new ValueGuess(null, Guess::MEDIUM_CONFIDENCE);
}
break;
case 'Symfony\Component\Validator\Constraints\Range':
if (is_numeric($constraint->max)) {
return new ValueGuess(strlen((string) $constraint->max), Guess::LOW_CONFIDENCE);
}
break;
}
return null;
}
/**
* Guesses a field's pattern based on the given constraint
*
* @param Constraint $constraint The constraint to guess for
*
* @return ValueGuess|null The guess for the pattern
*/
public function guessPatternForConstraint(Constraint $constraint)
{
switch (get_class($constraint)) {
case 'Symfony\Component\Validator\Constraints\Length':
if (is_numeric($constraint->min)) {
return new ValueGuess(sprintf('.{%s,}', (string) $constraint->min), Guess::LOW_CONFIDENCE);
}
break;
case 'Symfony\Component\Validator\Constraints\Regex':
$htmlPattern = $constraint->getHtmlPattern();
if (null !== $htmlPattern) {
return new ValueGuess($htmlPattern, Guess::HIGH_CONFIDENCE);
}
break;
case 'Symfony\Component\Validator\Constraints\Range':
if (is_numeric($constraint->min)) {
return new ValueGuess(sprintf('.{%s,}', strlen((string) $constraint->min)), Guess::LOW_CONFIDENCE);
}
break;
case 'Symfony\Component\Validator\Constraints\Type':
if (in_array($constraint->type, array('double', 'float', 'numeric', 'real'))) {
return new ValueGuess(null, Guess::MEDIUM_CONFIDENCE);
}
break;
}
return null;
}
/**
* Iterates over the constraints of a property, executes a constraints on
* them and returns the best guess
*
* @param string $class The class to read the constraints from
* @param string $property The property for which to find constraints
* @param \Closure $closure The closure that returns a guess
* for a given constraint
* @param mixed $defaultValue The default value assumed if no other value
* can be guessed.
*
* @return Guess|null The guessed value with the highest confidence
*/
protected function guess($class, $property, \Closure $closure, $defaultValue = null)
{
$guesses = array();
$classMetadata = $this->metadataFactory->getMetadataFor($class);
if ($classMetadata->hasMemberMetadatas($property)) {
$memberMetadatas = $classMetadata->getMemberMetadatas($property);
foreach ($memberMetadatas as $memberMetadata) {
$constraints = $memberMetadata->getConstraints();
foreach ($constraints as $constraint) {
if ($guess = $closure($constraint)) {
$guesses[] = $guess;
}
}
}
if (null !== $defaultValue) {
$guesses[] = new ValueGuess($defaultValue, Guess::LOW_CONFIDENCE);
}
}
return Guess::getBestGuess($guesses);
}
}