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<?php
/**
* SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OCA\WorkflowEngine\Check;
use OCP\IL10N;
use OCP\WorkflowEngine\ICheck;
use OCP\WorkflowEngine\IManager;
abstract class AbstractStringCheck implements ICheck {
/** @var array[] Nested array: [Pattern => [ActualValue => Regex Result]] */
protected $matches;
/** @var IL10N */
protected $l;
/**
* @param IL10N $l
*/
public function __construct(IL10N $l) {
$this->l = $l;
}
/**
* @return string
*/
abstract protected function getActualValue();
/**
* @param string $operator
* @param string $value
* @return bool
*/
public function executeCheck($operator, $value) {
$actualValue = $this->getActualValue();
return $this->executeStringCheck($operator, $value, $actualValue);
}
/**
* @param string $operator
* @param string $checkValue
* @param string $actualValue
* @return bool
*/
protected function executeStringCheck($operator, $checkValue, $actualValue) {
if ($operator === 'is') {
return $checkValue === $actualValue;
} elseif ($operator === '!is') {
return $checkValue !== $actualValue;
} else {
$match = $this->match($checkValue, $actualValue);
if ($operator === 'matches') {
return $match === 1;
} else {
return $match === 0;
}
}
}
/**
* @param string $operator
* @param string $value
* @throws \UnexpectedValueException
*/
public function validateCheck($operator, $value) {
if (!in_array($operator, ['is', '!is', 'matches', '!matches'])) {
throw new \UnexpectedValueException($this->l->t('The given operator is invalid'), 1);
}
if (in_array($operator, ['matches', '!matches']) &&
@preg_match($value, null) === false) {
throw new \UnexpectedValueException($this->l->t('The given regular expression is invalid'), 2);
}
}
public function supportedEntities(): array {
// universal by default
return [];
}
public function isAvailableForScope(int $scope): bool {
// admin only by default
return $scope === IManager::SCOPE_ADMIN;
}
/**
* @param string $pattern
* @param string $subject
* @return int|bool
*/
protected function match($pattern, $subject) {
$patternHash = md5($pattern);
$subjectHash = md5($subject);
if (isset($this->matches[$patternHash][$subjectHash])) {
return $this->matches[$patternHash][$subjectHash];
}
if (!isset($this->matches[$patternHash])) {
$this->matches[$patternHash] = [];
}
$this->matches[$patternHash][$subjectHash] = preg_match($pattern, $subject);
return $this->matches[$patternHash][$subjectHash];
}
}
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