1 files changed, 74 insertions, 0 deletions
diff --git a/get.php b/get.php
new file mode 100644
index 0000000..d816573
--- /dev/null
+++ b/get.php
@@ -0,0 +1,74 @@
+<?php
+   header('Content-Type: text/calendar; charset=UTF-8');
+
+   $group = $_GET["g"];
+   $modules = explode(",", $_GET["m"]);
+
+   if (!preg_match("/^[0-9A-Za-z_-]+$/", $group))
+   {
+      echo "[E] Invalid group ID: " . $group;
+
+      exit -1;
+   }
+
+   $vcalendar  = "BEGIN:VCALENDAR\r\n";
+   $vcalendar .= "VERSION:2.0\r\n";
+   $vcalendar .= "PRODID:-//MultiAgentSystems.org//University Calendar//EN\r\n";
+   $vcalendar .= "CALSCALE:GREGORIAN\r\n";
+   $vcalendar .= "METHOD:PUBLISH\r\n";
+   $vcalendar .= "X-WR-CALNAME:";
+   $vcalendar .= str_replace("_", " ", $group);
+   $vcalendar .= "\r\n";
+   $vcalendar .= "X-WR-TIMEZONE:Europe/Paris\r\n";
+   $vcalendar .= "BEGIN:VTIMEZONE\r\n";
+   $vcalendar .= "TZID:Europe/Paris\r\n";
+   $vcalendar .= "X-LIC-LOCATION:Europe/Paris\r\n";
+   $vcalendar .= "BEGIN:DAYLIGHT\r\n";
+   $vcalendar .= "TZOFFSETFROM:+0100\r\n";
+
+   $vcalendar .= "TZOFFSETTO:+0200\r\n";
+   $vcalendar .= "TZNAME:CEST\r\n";
+   $vcalendar .= "DTSTART:19810329T020000\r\n";
+   $vcalendar .= "RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU\r\n";
+   $vcalendar .= "END:DAYLIGHT\r\n";
+   $vcalendar .= "BEGIN:STANDARD\r\n";
+   $vcalendar .= "TZOFFSETFROM:+0200\r\n";
+   $vcalendar .= "TZOFFSETTO:+0100\r\n";
+   $vcalendar .= "TZNAME:CET\r\n";
+   $vcalendar .= "DTSTART:19961027T030000\r\n";
+   $vcalendar .= "RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU\r\n";
+   $vcalendar .= "END:STANDARD\r\n";
+   $vcalendar .= "END:VTIMEZONE\r\n";
+
+   echo $vcalendar;
+
+   foreach ($modules as $module)
+   {
+      $ics_fragment = "output/" . $group . "_" . $module . ".ics";
+      if (!preg_match("/^[0-9A-Za-z_-]+$/", $module))
+      {
+         echo "[E] Invalid module ID: " . $module;
+
+         exit -1;
+      }
+
+      if (file_exists($ics_fragment))
+      {
+         readfile($ics_fragment);
+      }
+   }
+
+   $group_ics_file = $group . ".ics";
+
+   if (file_exists($group_ics_file))
+   {
+      readfile($group_ics_file);
+   }
+
+   if (file_exists("warnings.ics"))
+   {
+      readfile("warnings.ics");
+   }
+
+   echo "END:VCALENDAR";
+?>