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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\Validator\Constraints;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\Exception\ConstraintDefinitionException;
use Symfony\Component\Validator\Exception\RuntimeException;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;
/**
* Validates whether a value is a valid image file and is valid
* against minWidth, maxWidth, minHeight and maxHeight constraints.
*
* @author Benjamin Dulau <benjamin.dulau@gmail.com>
* @author Bernhard Schussek <bschussek@gmail.com>
*/
class ImageValidator extends FileValidator
{
/**
* {@inheritdoc}
*/
public function validate($value, Constraint $constraint)
{
if (!$constraint instanceof Image) {
throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Image');
}
$violations = count($this->context->getViolations());
parent::validate($value, $constraint);
$failed = count($this->context->getViolations()) !== $violations;
if ($failed || null === $value || '' === $value) {
return;
}
if (null === $constraint->minWidth && null === $constraint->maxWidth
&& null === $constraint->minHeight && null === $constraint->maxHeight
&& null === $constraint->minPixels && null === $constraint->maxPixels
&& null === $constraint->minRatio && null === $constraint->maxRatio
&& $constraint->allowSquare && $constraint->allowLandscape && $constraint->allowPortrait
&& !$constraint->detectCorrupted) {
return;
}
$size = @getimagesize($value);
if (empty($size) || (0 === $size[0]) || (0 === $size[1])) {
$this->context->buildViolation($constraint->sizeNotDetectedMessage)
->setCode(Image::SIZE_NOT_DETECTED_ERROR)
->addViolation();
return;
}
$width = $size[0];
$height = $size[1];
if ($constraint->minWidth) {
if (!ctype_digit((string) $constraint->minWidth)) {
throw new ConstraintDefinitionException(sprintf('"%s" is not a valid minimum width.', $constraint->minWidth));
}
if ($width < $constraint->minWidth) {
$this->context->buildViolation($constraint->minWidthMessage)
->setParameter('{{ width }}', $width)
->setParameter('{{ min_width }}', $constraint->minWidth)
->setCode(Image::TOO_NARROW_ERROR)
->addViolation();
return;
}
}
if ($constraint->maxWidth) {
if (!ctype_digit((string) $constraint->maxWidth)) {
throw new ConstraintDefinitionException(sprintf('"%s" is not a valid maximum width.', $constraint->maxWidth));
}
if ($width > $constraint->maxWidth) {
$this->context->buildViolation($constraint->maxWidthMessage)
->setParameter('{{ width }}', $width)
->setParameter('{{ max_width }}', $constraint->maxWidth)
->setCode(Image::TOO_WIDE_ERROR)
->addViolation();
return;
}
}
if ($constraint->minHeight) {
if (!ctype_digit((string) $constraint->minHeight)) {
throw new ConstraintDefinitionException(sprintf('"%s" is not a valid minimum height', $constraint->minHeight));
}
if ($height < $constraint->minHeight) {
$this->context->buildViolation($constraint->minHeightMessage)
->setParameter('{{ height }}', $height)
->setParameter('{{ min_height }}', $constraint->minHeight)
->setCode(Image::TOO_LOW_ERROR)
->addViolation();
return;
}
}
if ($constraint->maxHeight) {
if (!ctype_digit((string) $constraint->maxHeight)) {
throw new ConstraintDefinitionException(sprintf('"%s" is not a valid maximum height', $constraint->maxHeight));
}
if ($height > $constraint->maxHeight) {
$this->context->buildViolation($constraint->maxHeightMessage)
->setParameter('{{ height }}', $height)
->setParameter('{{ max_height }}', $constraint->maxHeight)
->setCode(Image::TOO_HIGH_ERROR)
->addViolation();
}
}
$pixels = $width * $height;
if (null !== $constraint->minPixels) {
if (!ctype_digit((string) $constraint->minPixels)) {
throw new ConstraintDefinitionException(sprintf('"%s" is not a valid minimum amount of pixels', $constraint->minPixels));
}
if ($pixels < $constraint->minPixels) {
$this->context->buildViolation($constraint->minPixelsMessage)
->setParameter('{{ pixels }}', $pixels)
->setParameter('{{ min_pixels }}', $constraint->minPixels)
->setParameter('{{ height }}', $height)
->setParameter('{{ width }}', $width)
->setCode(Image::TOO_FEW_PIXEL_ERROR)
->addViolation();
}
}
if (null !== $constraint->maxPixels) {
if (!ctype_digit((string) $constraint->maxPixels)) {
throw new ConstraintDefinitionException(sprintf('"%s" is not a valid maximum amount of pixels', $constraint->maxPixels));
}
if ($pixels > $constraint->maxPixels) {
$this->context->buildViolation($constraint->maxPixelsMessage)
->setParameter('{{ pixels }}', $pixels)
->setParameter('{{ max_pixels }}', $constraint->maxPixels)
->setParameter('{{ height }}', $height)
->setParameter('{{ width }}', $width)
->setCode(Image::TOO_MANY_PIXEL_ERROR)
->addViolation();
}
}
$ratio = round($width / $height, 2);
if (null !== $constraint->minRatio) {
if (!is_numeric((string) $constraint->minRatio)) {
throw new ConstraintDefinitionException(sprintf('"%s" is not a valid minimum ratio', $constraint->minRatio));
}
if ($ratio < $constraint->minRatio) {
$this->context->buildViolation($constraint->minRatioMessage)
->setParameter('{{ ratio }}', $ratio)
->setParameter('{{ min_ratio }}', $constraint->minRatio)
->setCode(Image::RATIO_TOO_SMALL_ERROR)
->addViolation();
}
}
if (null !== $constraint->maxRatio) {
if (!is_numeric((string) $constraint->maxRatio)) {
throw new ConstraintDefinitionException(sprintf('"%s" is not a valid maximum ratio', $constraint->maxRatio));
}
if ($ratio > $constraint->maxRatio) {
$this->context->buildViolation($constraint->maxRatioMessage)
->setParameter('{{ ratio }}', $ratio)
->setParameter('{{ max_ratio }}', $constraint->maxRatio)
->setCode(Image::RATIO_TOO_BIG_ERROR)
->addViolation();
}
}
if (!$constraint->allowSquare && $width == $height) {
$this->context->buildViolation($constraint->allowSquareMessage)
->setParameter('{{ width }}', $width)
->setParameter('{{ height }}', $height)
->setCode(Image::SQUARE_NOT_ALLOWED_ERROR)
->addViolation();
}
if (!$constraint->allowLandscape && $width > $height) {
$this->context->buildViolation($constraint->allowLandscapeMessage)
->setParameter('{{ width }}', $width)
->setParameter('{{ height }}', $height)
->setCode(Image::LANDSCAPE_NOT_ALLOWED_ERROR)
->addViolation();
}
if (!$constraint->allowPortrait && $width < $height) {
$this->context->buildViolation($constraint->allowPortraitMessage)
->setParameter('{{ width }}', $width)
->setParameter('{{ height }}', $height)
->setCode(Image::PORTRAIT_NOT_ALLOWED_ERROR)
->addViolation();
}
if ($constraint->detectCorrupted) {
if (!function_exists('imagecreatefromstring')) {
throw new RuntimeException('Corrupted images detection requires installed and enabled GD extension');
}
$resource = @imagecreatefromstring(file_get_contents($value));
if (false === $resource) {
$this->context->buildViolation($constraint->corruptedMessage)
->setCode(Image::CORRUPTED_IMAGE_ERROR)
->addViolation();
return;
}
imagedestroy($resource);
}
}
}