From feec3a0f7a19a1019e8f9a7329409544653e72a1 Mon Sep 17 00:00:00 2001
From: Andrew McMillan <debian@mcmillan.net.nz>
Date: Thu, 4 Jan 2007 08:35:20 +1300
Subject: [PATCH] Get a whole calendar when requested against a collection.

---
 inc/caldav-GET.php | 33 +++++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/inc/caldav-GET.php b/inc/caldav-GET.php
index 054db159..7a6f30fe 100644
--- a/inc/caldav-GET.php
+++ b/inc/caldav-GET.php
@@ -14,17 +14,46 @@ if ( ! $request->AllowedTo('read') ) {
   $request->DoResponse( 403, translate("You may not access that calendar") );
 }
 
-$qry = new PgQuery( "SELECT * FROM caldav_data WHERE user_no = ? AND dav_name = ? ;", $request->user_no, $request->path);
+if ( $request->IsCollection() ) {
+  /**
+  * The CalDAV specification does not define GET on a collection, but typically this is
+  * used as a .ics download for the whole collection, which is what we do also.
+  */
+  $qry = new PgQuery( "SELECT caldav_data FROM caldav_data WHERE user_no = ? AND dav_name ~ ? ;", $request->user_no, $request->path.'[^/]+$');
+}
+else {
+  $qry = new PgQuery( "SELECT caldav_data FROM caldav_data WHERE user_no = ? AND dav_name = ? ;", $request->user_no, $request->path);
+}
 dbg_error_log("get", "%s", $qry->querystring );
 if ( $qry->Exec("GET") && $qry->rows == 1 ) {
   $event = $qry->Fetch();
+  header( "Content-length: ".strlen($event->caldav_data) );
   $request->DoResponse( 200, ($request->method == "HEAD" ? "" : $event->caldav_data), "text/calendar" );
 }
 else if ( $qry->rows < 1 ) {
   $request->DoResponse( 404, translate("Calendar Resource Not Found.") );
 }
 else if ( $qry->rows > 1 ) {
-  $request->DoResponse( 500, translate("Database Error - Multiple Rows Match.") );
+  /**
+  * Here we are constructing a whole calendar response for this collection, including
+  * the timezones that are referred to by the events we have selected.
+  */
+  include_once("iCalendar.php");
+  $response = iCalendar::iCalHeader();
+  $timezones = array();
+  while( $event = $qry->Fetch() ) {
+    $ical = new iCalendar( array( "icalendar" => $event->caldav_data ) );
+    if ( isset($ical->tz_locn) && $ical->tz_locn != "" && isset($ical->vtimezone) && $ical->vtimezone != "" ) {
+      $timezones[$ical->tz_locn] = $ical->vtimezone;
+    }
+    $response .= $ical->JustThisBitPlease("VEVENT");
+  }
+  foreach( $timezones AS $tzid => $vtimezone ) {
+    $response .= $vtimezone;
+  }
+  $response .= iCalendar::iCalFooter();
+  header( "Content-length: ".strlen($response) );
+  $request->DoResponse( 200, ($request->method == "HEAD" ? "" : $response), "text/calendar" );
 }
 else {
   $request->DoResponse( 500, translate("Database Error") );