inc/caldav-POST.php

   1 <?php
   2 /**
   3 * CalDAV Server - handle PUT method
   4 *
   5 * @package   davical
   6 * @subpackage   caldav
   7 * @author    Andrew McMillan <andrew@morphoss.com>
   8 * @copyright Morphoss Ltd - http://www.morphoss.com/
   9 * @license   http://gnu.org/copyleft/gpl.html GNU GPL v2 or later
  10 */
  11 dbg_error_log("POST", "method handler");
  12
  13 require_once("XMLDocument.php");
  14 include_once('caldav-PUT-functions.php');
  15 include_once('freebusy-functions.php');
  16
  17 if ( ! $request->AllowedTo("CALDAV:schedule-send-freebusy")
  18   && ! $request->AllowedTo("CALDAV:schedule-send-invite")
  19   && ! $request->AllowedTo("CALDAV:schedule-send-reply") ) {
  20   // $request->DoResponse(403);
  21   dbg_error_log( "WARN", ": POST: permissions not yet checked" );
  22 }
  23
  24 if ( ! ini_get('open_basedir') && (isset($c->dbg['ALL']) || isset($c->dbg['post'])) ) {
  25   $fh = fopen('/tmp/POST.txt','w');
  26   if ( $fh ) {
  27     fwrite($fh,$request->raw_post);
  28     fclose($fh);
  29   }
  30 }
  31
  32
  33 function handle_freebusy_request( $ic ) {
  34   global $c, $session, $request;
  35
  36   $reply = new XMLDocument( array("DAV:" => "", "urn:ietf:params:xml:ns:caldav" => "C" ) );
  37   $responses = array();
  38
  39   $fbq_start = $ic->GetPValue('DTSTART');
  40   $fbq_end   = $ic->GetPValue('DTEND');
  41   if ( ! ( isset($fbq_start) || isset($fbq_end) ) ) {
  42     $request->DoResponse( 400, 'All valid freebusy requests MUST contain a DTSTART and a DTEND' );
  43   }
  44
  45   $range_start = new RepeatRuleDateTime($fbq_start);
  46   $range_end   = new RepeatRuleDateTime($fbq_end);
  47
  48   $attendees = $ic->GetProperties('ATTENDEE');
  49   if ( preg_match( '# iCal/\d#', $_SERVER['HTTP_USER_AGENT']) ) {
  50     dbg_error_log( "POST", "Non-compliant iCal request.  Using X-WR-ATTENDEE property" );
  51     $wr_attendees = $ic->GetProperties('X-WR-ATTENDEE');
  52     foreach( $wr_attendees AS $k => $v ) {
  53       $attendees[] = $v;
  54     }
  55   }
  56   dbg_error_log( "POST", "Responding with free/busy for %d attendees", count($attendees) );
  57
  58   foreach( $attendees AS $k => $attendee ) {
  59     $attendee_email = preg_replace( '/^mailto:/', '', $attendee->Value() );
  60     dbg_error_log( "POST", "Calculating free/busy for %s", $attendee_email );
  61
  62     /** @todo Refactor this so we only do one query here and loop through the results */
  63     $params = array( ':session_principal' => $session->principal_id, ':scan_depth' => $c->permission_scan_depth, ':email' => $attendee_email );
  64     $qry = new AwlQuery('SELECT pprivs(:session_principal::int8,principal_id,:scan_depth::int) AS p, username FROM usr JOIN principal USING(user_no) WHERE lower(usr.email) = lower(:email)', $params );
  65     if ( !$qry->Exec('POST',__LINE__,__FILE__) ) $request->DoResponse( 501, 'Database error');
  66     if ( $qry->rows() > 1 ) {
  67       // Unlikely, but if we get more than one result we'll do an exact match instead.
  68       if ( !$qry->QDo('SELECT pprivs(:session_principal::int8,principal_id,:scan_depth::int) AS p, username FROM usr JOIN principal USING(user_no) WHERE usr.email = :email', $params ) )
  69         $request->DoResponse( 501, 'Database error');
  70       if ( $qry->rows() == 0 ) {
  71         /** Sigh... Go back to the original case-insensitive match */
  72         $qry->QDo('SELECT pprivs(:session_principal::int8,principal_id,:scan_depth::int) AS p, username FROM usr JOIN principal USING(user_no) WHERE lower(usr.email) = lower(:email)', $params );
  73       }
  74     }
  75
  76     $response = $reply->NewXMLElement("response", false, false, 'urn:ietf:params:xml:ns:caldav');
  77     $reply->CalDAVElement($response, "recipient", $reply->href($attendee->Value()) );
  78
  79     if ( $qry->rows() == 0 ) {
  80       $reply->CalDAVElement($response, "request-status", "3.7;Invalid Calendar User" );
  81       $reply->CalDAVElement($response, "calendar-data" );
  82       $responses[] = $response;
  83       continue;
  84     }
  85     if ( ! $attendee_usr = $qry->Fetch() ) $request->DoResponse( 501, 'Database error');
  86     if ( (privilege_to_bits('schedule-query-freebusy') & bindec($attendee_usr->p)) == 0 ) {
  87       $reply->CalDAVElement($response, "request-status", "3.8;No authority" );
  88       $reply->CalDAVElement($response, "calendar-data" );
  89       $responses[] = $response;
  90       continue;
  91     }
  92     $attendee_path_match = '^/'.$attendee_usr->username.'/';
  93     $fb = get_freebusy( $attendee_path_match, $range_start, $range_end, bindec($attendee_usr->p) );
  94
  95     $fb->AddProperty( 'UID',       $ic->GetPValue('UID') );
  96     $fb->SetProperties( $ic->GetProperties('ORGANIZER'), 'ORGANIZER');
  97     $fb->AddProperty( $attendee );
  98
  99     $vcal = new vCalendar( array('METHOD' => 'REPLY') );
 100     $vcal->AddComponent( $fb );
 101
 102     $response = $reply->NewXMLElement( "response", false, false, 'urn:ietf:params:xml:ns:caldav' );
 103     $reply->CalDAVElement($response, "recipient", $reply->href($attendee->Value()) );
 104     $reply->CalDAVElement($response, "request-status", "2.0;Success" );  // Cargo-cult setting
 105     $reply->CalDAVElement($response, "calendar-data", $vcal->Render() );
 106     $responses[] = $response;
 107   }
 108
 109   $response = $reply->NewXMLElement( "schedule-response", $responses, $reply->GetXmlNsArray(), 'urn:ietf:params:xml:ns:caldav' );
 110   $request->XMLResponse( 200, $response );
 111 }
 112
 113
 114 function handle_cancel_request( $ic ) {
 115   global $c, $session, $request;
 116
 117   $reply = new XMLDocument( array("DAV:" => "", "urn:ietf:params:xml:ns:caldav" => "C" ) );
 118
 119   $response = $reply->NewXMLElement( "response", false, false, 'urn:ietf:params:xml:ns:caldav' );
 120   $reply->CalDAVElement($response, "request-status", "2.0;Success" );  // Cargo-cult setting
 121   $response = $reply->NewXMLElement( "schedule-response", $response, $reply->GetXmlNsArray() );
 122   $request->XMLResponse( 200, $response );
 123 }
 124
 125 $ical = new vComponent( $request->raw_post );
 126 $method =  $ical->GetPValue('METHOD');
 127
 128 $resources = $ical->GetComponents('VTIMEZONE',false);
 129 $first = $resources[0];
 130 switch ( $method ) {
 131   case 'REQUEST':
 132     dbg_error_log('POST', 'Handling iTIP "REQUEST" method with "%s" component.', $method, $first->GetType() );
 133     if ( $first->GetType() == 'VFREEBUSY' )
 134       handle_freebusy_request( $first );
 135     elseif ( $first->GetType() == 'VEVENT' ) {
 136       handle_schedule_request( $ical );
 137     }
 138     else {
 139       dbg_error_log('POST', 'Ignoring iTIP "REQUEST" with "%s" component.', $first->GetType() );
 140     }
 141     break;
 142   case 'REPLY':
 143     dbg_error_log('POST', 'Handling iTIP "REPLY" with "%s" component.', $first->GetType() );
 144     handle_schedule_reply ( $ical );
 145     break;
 146
 147   case 'CANCEL':
 148     dbg_error_log("POST", "Handling iTIP 'CANCEL'  method.", $method );
 149     handle_cancel_request( $first );
 150     break;
 151
 152   default:
 153     dbg_error_log("POST", "Unhandled '%s' method in request.", $method );
 154 }