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sources/3rdparty/sabre/dav/lib/Sabre/DAV/StringUtil.php 2.65 KB
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  <?php
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  namespace Sabre\DAV;
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  /**
   * String utility
   *
   * This class is mainly used to implement the 'text-match' filter, used by both
   * the CalDAV calendar-query REPORT, and CardDAV addressbook-query REPORT.
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   * Because they both need it, it was decided to put it in Sabre\DAV instead.
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   *
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   * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
   * @author Evert Pot (http://evertpot.com/)
   * @license http://sabre.io/license/ Modified BSD License
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   */
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  class StringUtil {
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      /**
       * Checks if a needle occurs in a haystack ;)
       *
       * @param string $haystack
       * @param string $needle
       * @param string $collation
       * @param string $matchType
       * @return bool
       */
      static public function textMatch($haystack, $needle, $collation, $matchType = 'contains') {
  
          switch($collation) {
  
              case 'i;ascii-casemap' :
                  // default strtolower takes locale into consideration
                  // we don't want this.
                  $haystack = str_replace(range('a','z'), range('A','Z'), $haystack);
                  $needle = str_replace(range('a','z'), range('A','Z'), $needle);
                  break;
  
              case 'i;octet' :
                  // Do nothing
                  break;
  
              case 'i;unicode-casemap' :
                  $haystack = mb_strtoupper($haystack, 'UTF-8');
                  $needle = mb_strtoupper($needle, 'UTF-8');
                  break;
  
              default :
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                  throw new Exception\BadRequest('Collation type: ' . $collation . ' is not supported');
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          }
  
          switch($matchType) {
  
              case 'contains' :
                  return strpos($haystack, $needle)!==false;
              case 'equals' :
                  return $haystack === $needle;
              case 'starts-with' :
                  return strpos($haystack, $needle)===0;
              case 'ends-with' :
                  return strrpos($haystack, $needle)===strlen($haystack)-strlen($needle);
              default :
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                  throw new Exception\BadRequest('Match-type: ' . $matchType . ' is not supported');
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          }
  
      }
  
      /**
       * This method takes an input string, checks if it's not valid UTF-8 and
       * attempts to convert it to UTF-8 if it's not.
       *
       * Note that currently this can only convert ISO-8559-1 to UTF-8 (latin-1),
       * anything else will likely fail.
       *
       * @param string $input
       * @return string
       */
      static public function ensureUTF8($input) {
  
          $encoding = mb_detect_encoding($input , array('UTF-8','ISO-8859-1'), true);
  
          if ($encoding === 'ISO-8859-1') {
              return utf8_encode($input);
          } else {
              return $input;
          }
  
      }
  
  }