current code from svn, revision 62608

1 files changed, 82 insertions, 0 deletions

diff --git a/app/controllers/ical.php b/app/controllers/ical.php
new file mode 100644
index 0000000..06afc4d
--- /dev/null
+++ b/app/controllers/ical.php
@@ -0,0 +1,82 @@
+<?php
+/*
+ * ical.php - iCalendar export controller
+ *
+ * Copyright (C) 2011 - Peter Thienel <thienel@data-quest.de>, Elmar Ludwig
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+class iCalController extends StudipController
+{
+
+    function before_filter(&$action, &$args) {
+        // allow only "word" characters in arguments
+        $this->validate_args($args);
+    }
+
+    /**
+     * Handles the download the calendar data as iCalendar for the
+     * user identified by $key.
+     *
+     *
+     * @global Seminar_User $user
+     * @global Seminar_Perm $perm
+     * @param string $key
+     * @param string $type type of export
+     */
+    function index_action($key = '')
+    {
+        if (mb_strlen($key)) {
+            $user_id = IcalExport::getUserIdByKey($key);
+        } else {
+            $username = $_SERVER['PHP_AUTH_USER'];
+            $password = $_SERVER['PHP_AUTH_PW'];
+            if (isset($username) && isset($password)) {
+                $result = StudipAuthAbstract::CheckAuthentication($username, $password);
+            }
+            if (isset($result) && $result['uid'] !== false) {
+                $user_id = $result['uid'];
+            } else {
+               $this->response->add_header('WWW-Authenticate', 'Basic realm="Stud.IP Login"');
+               $this->set_status(401);
+               $this->render_text('authentication failed');
+               return;
+            }
+        }
+
+        if ($user_id) {
+            $GLOBALS['user'] = new Seminar_User($user_id);
+            $GLOBALS['perm'] = new Seminar_Perm();
+
+            $extype = 'ALL_EVENTS';
+            $export = new CalendarExport(new CalendarWriterICalendar());
+            $export->exportFromDatabase($user_id, strtotime('-4 week'), 2114377200, 'ALL_EVENTS');
+
+            if ($GLOBALS['_calendar_error']->getMaxStatus(ErrorHandler::ERROR_CRITICAL)) {
+                $this->set_status(500);
+                $this->render_nothing();
+                return;
+            }
+            $content = join($export->getExport());
+            if (mb_stripos($_SERVER['HTTP_USER_AGENT'], 'google-calendar') !== false) {
+                $content = str_replace(['CLASS:PRIVATE','CLASS:CONFIDENTIAL'], 'CLASS:PUBLIC', $content);
+            }
+            $this->response->add_header('Content-Type', 'text/calendar;charset=utf-8');
+            $this->response->add_header('Content-Disposition', 'attachment; filename="studip.ics"');
+            $this->response->add_header('Content-Transfer-Encoding', 'binary');
+            $this->response->add_header('Pragma', 'public');
+            $this->response->add_header('Cache-Control', 'private');
+            $this->response->add_header('Content-Length', strlen($content));
+            $this->render_text($content);
+        } else {
+            // delayed response to prevent brute force attacks ???
+
+            $this->set_status(400);
+            $this->render_nothing();
+        }
+    }
+
+}