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<?php

namespace ZendServer\Validator;

use Zend\Validator\AbstractValidator;

class DirectiveStringValidator extends AbstractValidator
{
    const INVALID_STRING = 'invalid string';

    /**
     * @var string
     */
    protected $value;

    /**
     * @var array
     */
    protected $messageTemplates = array(
        self::INVALID_STRING => "'%value%' is not a valid string value for a directive. Directive string values may be alpha numeric, punctuation or printable characters except for quotes.",
    );

    /* (non-PHPdoc)
     * @see Zend_Validate_Interface::isValid()
     */

    public function isValid($value)
    {
        $this->setValue($value);

        if ((preg_match('/^"?[[:print:]]*"?$/', $value) > 0) && (preg_match('/^"?[^"]*"?$/', $value) > 0)) {
            return true;
        }

        $this->error(self::INVALID_STRING);
        return false;
    }
}