Initial Release of the calendar plugin

dav/SabreDAV/lib/Sabre/DAV/StringUtil.php

@@ -0,0 +1,91 @@
+<?php
+
+/**
+ * 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.
+ * Because they both need it, it was decided to put it in Sabre_DAV instead.
+ *
+ * @package Sabre
+ * @subpackage DAV
+ * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
+ * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
+ */
+class Sabre_DAV_StringUtil {
+
+    /**
+     * 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 :
+                throw new Sabre_DAV_Exception_BadRequest('Collation type: ' . $collation . ' is not supported');
+
+        }
+
+        switch($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 :
+                throw new Sabre_DAV_Exception_BadRequest('Match-type: ' . $matchType . ' is not supported');
+
+        }
+
+    }
+
+    /**
+     * 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;
+        }
+
+    }
+
+}