File indexing completed on 2024-12-15 03:45:06

 <?php
 /*
     SPDX-FileCopyrightText: 2016 Volker Krause <vkrause@kde.org>
 
     SPDX-License-Identifier: MIT
 */
 
 require_once('restexception.php');
 
 class Utils {
 
 public static function isValidIdentifier($str)
 {
     if (!is_string($str) || strlen($str) <= 0)
         return false;
     if (!ctype_alpha($str[0]) && $str[0] != '_') // must start with a letter or underscore
         return false;
     for ($i = 0; $i < strlen($str); $i++) {
         if (ctype_space($str[$i]) || ctype_cntrl($str[$i]))
             return false;
     }
     return true;
 }
 
 public static function normalizeString($input)
 {
     $result = '';
     for ($i = 0; $i < strlen($input); $i++) {
         $c = $input[$i];
         if (!ctype_alnum($c))
             $c = '_';
         $result .= $c;
     }
     return $result;
 }
 
 /** Driver-dependen default SQL string type. */
 public static function sqlStringType($driver)
 {
     switch ($driver) {
         case 'sqlite':
         case 'pgsql':
             return 'VARCHAR';
         case 'mysql':
             return 'VARCHAR(255)';
     }
     throw new RESTException('Unsupported database driver.', 500);
 }
 
 /** Driver-dependent column declaration for a numeric auto-increment primary key. */
 public static function primaryKeyColumnDeclaration($driver, $columnName)
 {
     switch ($driver) {
         case 'sqlite':
             return $columnName . ' INTEGER PRIMARY KEY AUTOINCREMENT';
         case 'mysql':
             return $columnName . ' INTEGER PRIMARY KEY AUTO_INCREMENT';
         case 'pgsql':
             return $columnName . ' SERIAL PRIMARY KEY';
     }
     throw new RESTException('Unsupported database driver.', 500);
 }
 
 public static function httpError($responseCode, $message)
 {
     error_log('UserFeedback ERROR: ' . $message . ' (' . $responseCode . ')');
     http_response_code($responseCode);
     header('Content-Type: text/plain');
     print($message);
     exit(1);
 }
 
 }
 
 ?>