class FileExtensionConstraintValidator

Same name in other branches
  1. 11.x core/modules/file/src/Plugin/Validation/Constraint/FileExtensionConstraintValidator.php \Drupal\file\Plugin\Validation\Constraint\FileExtensionConstraintValidator

Validates the file extension constraint.

Hierarchy

Expanded class hierarchy of FileExtensionConstraintValidator

File

core/modules/file/src/Plugin/Validation/Constraint/FileExtensionConstraintValidator.php, line 13

Namespace

Drupal\file\Plugin\Validation\Constraint
View source 
class FileExtensionConstraintValidator extends BaseFileConstraintValidator {
    
    /**
     * {@inheritdoc}
     */
    public function validate(mixed $value, Constraint $constraint) {
        $file = $this->assertValueIsFile($value);
        if (!$constraint instanceof FileExtensionConstraint) {
            throw new UnexpectedTypeException($constraint, FileExtensionConstraint::class);
        }
        $extensions = $constraint->extensions;
        $regex = '/\\.(' . preg_replace('/ +/', '|', preg_quote($extensions)) . ')$/i';
        // Filename may differ from the basename, for instance in case files
        // migrated from D7 file entities. Because of that new files are saved
        // temporarily with a generated file name, without the original extension,
        // we will use the generated filename property for extension validation only
        // in case of temporary files; and use the file system file name in case of
        // permanent files.
        $subject = $file->isTemporary() ? $file->getFilename() : $file->getFileUri();
        if (!preg_match($regex, $subject)) {
            $this->context
                ->addViolation($constraint->message, [
                '%files-allowed' => $extensions,
            ]);
        }
    }

}

Members

Title Modifiers Object type Summary
BaseFileConstraintValidator::assertValueIsFile protected function Checks the value is of type FileInterface.
FileExtensionConstraintValidator::validate public function

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