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<?php
/**
* Nextcloud - Gallery
*
* This file is licensed under the Affero General Public License version 3 or
* later. See the COPYING file.
*
* @author Olivier Paroz <galleryapps@oparoz.com>
*
* @copyright Olivier Paroz 2017
*/
namespace OCA\Gallery\Config;
/**
* Validates parsed configuration elements
*
* @package OCA\Gallery\Config
*/
class ConfigValidator {
/**
* Determines if the content of that sub-section is safe for web use
*
* @param string $key the configuration sub-section identifier
* @param array $parsedConfigItem the configuration for a sub-section
*
* @return bool
*/
public function isConfigSafe($key, $parsedConfigItem) {
$safe = true;
switch ($key) {
case 'sorting':
$safe = $this->isSortingSafe('type',$parsedConfigItem, $safe);
$safe = $this->isSortingSafe('order',$parsedConfigItem, $safe);
break;
case 'design':
$safe = $this->isDesignColourSafe($parsedConfigItem, $safe);
break;
}
return $safe;
}
/**
* Determines if the sorting type found in the config file is safe for web use
* @param string will specify the key to check 'type' or 'order'
* @param array $parsedConfigItem the sorting configuration to analyse
* @param bool $safe whether the current config has been deemed safe to use so far
* @return bool
*/
private function isSortingSafe($key,$parsedConfigItem, $safe) {
if ($safe && array_key_exists($key, $parsedConfigItem)) {
$safe = $safe && $this->sortingValidator($key, $parsedConfigItem[ $key ]);
}
return $safe;
}
/**
* Determines if the background colour found in the config file is safe for web use
*
* @param array $parsedConfigItem the design configuration to analyse
* @param bool $safe whether the current config has been deemed safe to use so far
*
* @return bool
*/
private function isDesignColourSafe($parsedConfigItem, $safe) {
if (array_key_exists('background', $parsedConfigItem)) {
$background = $parsedConfigItem['background'];
$safe = $safe && ctype_xdigit(substr($background, 1));
}
return $safe;
}
/**
* Validates the parsed sorting values against allowed values
*
* @param string $section the section in the sorting config to be analysed
* @param string $value the value found in that section
*
* @return bool
*/
private function sortingValidator($section, $value) {
if ($section === 'type') {
$validValues = ['date', 'name'];
} else {
$validValues = ['des', 'asc'];
}
return in_array($value, $validValues);
}
}