76 lines
2.5 KiB
PHP
76 lines
2.5 KiB
PHP
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<?php
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/**
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; under version 2
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* of the License (non-upgradable).
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright (c) 2008-2010 (original work) Deutsche Institut für Internationale Pädagogische Forschung (under the project TAO-TRANSFER);
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* 2009-2012 (update and modification) Public Research Centre Henri Tudor (under the project TAO-SUSTAIN & TAO-DEV);
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* 2020 (original work) (update and modification) Open Assessment Technologies SA
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*/
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/**
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* Short description of class tao_helpers_form_validators_Url
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*
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* @author Bertrand Chevrier, <bertrand.chevrier@tudor.lu>
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*/
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class tao_helpers_form_validators_Url extends tao_helpers_form_Validator
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{
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private const OPTION_ALLOW_EMPTY = 'allow_empty';
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/**
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* @author Bertrand Chevrier, <bertrand.chevrier@tudor.lu>
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*/
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public function __construct(array $options = [])
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{
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parent::__construct($options);
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}
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/**
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* @param string $value
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* @return bool
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*/
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public function evaluate($value)
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{
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if ('' === $value && $this->hasOption(self::OPTION_ALLOW_EMPTY) && $this->getOption(self::OPTION_ALLOW_EMPTY) == true) {
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return true;
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}
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//backward compatible behavior:
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//scheme should be prepended if not found (pattern includes spelling errors)
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if (preg_match('/^[a-zA-Z]{1,10}[:\/]{1,3}/', $value) === false) {
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$value = 'http://' . $value;
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}
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$returnValue = !(filter_var($value, FILTER_VALIDATE_URL) === false);
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//'isset' is backward compatible behavior
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if (!$this->hasOption('allow_parameters')) {
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$returnValue = $returnValue && (strpos($value, '?') === false);
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}
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return $returnValue;
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}
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/**
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* Default error message
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*
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* @return string
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*/
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protected function getDefaultMessage()
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{
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return __('Provided URL is not valid');
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}
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}
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