* Moved iCalendar parsing function into it's own class, complete with offsets support

 * Fixed bug with $depth < 'infinity'
 * TODO If this parser works & has all necessary features, add documentation

1 files changed, 193 insertions, 0 deletions

diff --git a/lib/HTTP/CalDAV/Tools/ICalendarParser.php b/lib/HTTP/CalDAV/Tools/ICalendarParser.php
new file mode 100644
index 0000000..0e3ffe3
--- /dev/null
+++ b/lib/HTTP/CalDAV/Tools/ICalendarParser.php
@@ -0,0 +1,193 @@
+<?php
+
+/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
+
+/**
+ * Helper for parsing iCalendar format
+ *
+ * Long description for file (if any)...
+ *
+ * PHP versions 4 & 5
+ *
+ * LICENSE: This source file is subject to version 3.0 of the PHP license
+ * that is available through the world-wide-web at the following URI:
+ * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
+ * the PHP License & are unable to obtain it through the web, please
+ * send a note to license@php.net so we can mail you a copy immediately
+ *
+ * @category HTTP
+ * @package HTTP_CalDAV_Server
+ * @author Jack Bates <ms419@freezone.co.uk>
+ * @copyright 2006 The PHP Group
+ * @license PHP License 3.0 http://www.php.net/license/3_0.txt
+ * @version CVS: $Id: ICalendarParser.php,v 1.1 2006/04/18 03:22:12 jablko Exp $
+ * @link http://pear.php.net/package/HTTP_CalDAV_Server
+ * @see HTTP_WebDAV_Server
+ */
+
+/**
+ * Helper for parsing iCalendar format
+ *
+ * Long description
+ *
+ * @category HTTP
+ * @package HTTP_CalDAV_Server
+ * @author Jack Bates <ms419@freezone.co.uk>
+ * @copyright 2006 The PHP Group
+ * @license PHP License 3.0 http://www.php.net/license/3_0.txt
+ * @version CVS: $Id: ICalendarParser.php,v 1.1 2006/04/18 03:22:12 jablko Exp $
+ * @link http://pear.php.net/package/HTTP_CalDAV_Server
+ * @see HTTP_WebDAV_Server
+ */
+class ICalendarParser
+{
+    /**
+     * Success state flag
+     *
+     * @var bool
+     * @access public
+     */
+    var $success = false;
+
+    /**
+     * Parsed components are collected here in post-order
+     *
+     * @var array
+     * @access public
+     */
+    var $comps = array();
+
+    /**
+     * Parsed components' offsets are collected here in post-order
+     *
+     * @var array
+     * @access public
+     */
+    var $offsets = array();
+
+    /**
+     * Constructor
+     *
+     * @param resource input stream handle
+     * @access public
+     */
+    function ICalendarParser($handle, $beginOffset=null, $endOffset=null,
+        $value=null, $filters=null)
+    {
+        $comps = array();
+        $beginOffsets = array();
+        $compValues = array($value);
+        $compFilters = array($filters);
+        $this->success = true;
+        while (($offset = ftell($handle)) !== false &&
+                ($line = fgets($handle, 4096)) !== false) {
+            if (isset($endOffset) && $offset > $endOffset) {
+                return;
+            }
+
+            $line = explode(':', trim($line));
+
+            if ($line[0] == 'END') {
+                if ($line[1] != $comps[count($comps) - 1]->name) {
+                    $this->success = false;
+                    return;
+                }
+
+                if (is_array($compFilters[count($compFilters) - 1]['filters'])) {
+                    foreach ($compFilters[count($compFilters) - 1]['filters'] as $filter) {
+                        if ($filter['name'] == 'time-range') {
+                            if ($filter['value']['start'] > $comps[count($comps) - 1]->properties['DTEND'][0]->value || $filter['value']['end'] < $comps[count($comps) - 1]->properties['DTSTART'][0]->value) {
+                                array_pop($compValues);
+                                array_pop($compFilters);
+                                continue;
+                            }
+                        }
+                    }
+                }
+
+                if (count($comps) > 1 &&
+                        !$comps[count($comps) - 2]->add_component($comps[count(
+                        $comps) - 1])) {
+                    $this->success = false;
+                    return;
+                }
+
+                if (($offset = ftell($handle)) === false) {
+                    $this->success = false;
+                    return;
+                }
+
+                $this->comps[] = array_pop($comps);
+                $this->offsets[] = array(array_pop($beginOffsets), $offset);
+                array_pop($compValues);
+                array_pop($compFilters);
+                continue;
+            }
+
+            if ($line[0] == 'BEGIN') {
+                $compName = $line[1];
+                if (is_array($compValues[count($compValues) - 1]['comps']) &&
+                        !isset($compValues[count($compValues) - 1]['comps'][$compName])) {
+                    while (($line = fgets($handle, 4096)) !== false) {
+                        if (trim($line) == "END:$compName") {
+                            continue (2);
+                        }
+                    }
+
+                    $this->success = false;
+                    return;
+                }
+
+                $className = 'iCalendar_' . ltrim(strtolower($compName), 'v');
+                if ($line[1] == 'VCALENDAR') {
+                    $className = 'iCalendar';
+                }
+
+                if (!class_exists($className)) {
+                    while (($line = fgets($handle, 4096)) !== false) {
+                        if (trim($line) == "END:$compName") {
+                            continue (2);
+                        }
+                    }
+
+                    $this->success = false;
+                    return;
+                }
+
+                $comps[] = new $className;
+                $beginOffsets[] = $offset;
+                $compValues[] = $compValues[count($compValues) - 1]['comps'][$compName];
+                $compFilters[] = $compFilters[count($compFilters) - 1]['comps'][$compName];
+                continue;
+            }
+
+            $line[0] = explode(';=', $line[0]);
+            $propName = array_shift($line[0]);
+            if (is_array($compValues[count($compValues) - 1]['props']) &&
+                    !in_array($propName,
+                    $compValues[count($compValues) - 1]['props'])) {
+                continue;
+            }
+
+            $params = array();
+            while (!empty($line[0])) {
+                $params[array_shift($line[0])] = array_shift($line[0]);
+            }
+            $comps[count($comps) - 1]->add_property($propName, $line[1], $params);
+        }
+
+        if (!feof($handle)) {
+            $this->success = false;
+        }
+    }
+}
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * c-handling-comment-ender-p: nil
+ * End:
+ */
+
+?>