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davical/inc/caldav-PUT-functions.php

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<?php
/**
* CalDAV Server - handle PUT method
*
* @package davical
* @subpackage caldav
* @author Andrew McMillan <andrew@morphoss.com>
* @copyright Morphoss Ltd - http://www.morphoss.com/
* @license http://gnu.org/copyleft/gpl.html GNU GPL v2 or later version
*/
/**
* Check if the user wants to put just one VEVENT/VTODO or a whole calendar
* if the collection = calendar = $request_container doesn't exist then create it
* return true if it's a whole calendar
*/
require_once('iCalendar.php');
require_once('DAVResource.php');
require_once('PgQuery.php'); // We need this here now most everywhere else has switched to AwlQuery
/**
* A regex which will match most reasonable timezones acceptable to PostgreSQL.
*/
$tz_regex = ':^(Africa|America|Antarctica|Arctic|Asia|Atlantic|Australia|Brazil|Canada|Chile|Etc|Europe|Indian|Mexico|Mideast|Pacific|US)/[a-z_]+$:i';
/**
* This function launches an error
* @param boolean $caldav_context Whether we are responding via CalDAV or interactively
* @param int $user_no the user who will receive this ics file
* @param string $path the $path where the PUT failed to store such as /user_foo/home/
* @param string $message An optional error message to return to the client
* @param int $error_no An optional value for the HTTP error code
*/
function rollback_on_error( $caldav_context, $user_no, $path, $message='', $error_no=500 ) {
if ( !$message ) $message = translate('Database error');
$qry = new PgQuery('ROLLBACK;'); $qry->Exec('PUT-collection');
if ( $caldav_context ) {
global $request;
$request->DoResponse( $error_no, $message );
// and we don't return from that, ever...
}
global $c;
$c->messages[] = sprintf(translate('Status: %d, Message: %s, User: %d, Path: %s'), $error_no, $message, $user_no, $path);
}
/**
* Work out the location we are doing the PUT to, and check that we have the rights to
* do the needful.
* @param string $username The name of the destination user
* @param int $user_no The user making the change
* @param string $path The DAV path the resource is bing PUT to
* @param boolean $caldav_context Whether we are responding via CalDAV or interactively
* @param boolean $public Whether the collection will be public, should we need to create it
*/
function controlRequestContainer( $username, $user_no, $path, $caldav_context, $public = null ) {
global $c;
// Check to see if the path is like /foo /foo/bar or /foo/bar/baz etc. (not ending with a '/', but contains at least one)
if ( preg_match( '#^(.*/)([^/]+)$#', $path, $matches ) ) {//(
$request_container = $matches[1]; // get everything up to the last '/'
}
else {
// In this case we must have a URL with a trailing '/', so it must be a collection.
$request_container = $path;
}
/**
* Before we write the event, we check the container exists, creating it if it doesn't
*/
if ( $request_container == "/$username/" ) {
/**
* Well, it exists, and we support it, but it is against the CalDAV spec
*/
dbg_error_log( 'WARN', ' Storing events directly in user\'s base folders is not recommended!');
}
else {
$sql = 'SELECT * FROM collection WHERE user_no = ? AND dav_name = ?;';
$qry = new PgQuery( $sql, $user_no, $request_container );
if ( ! $qry->Exec('PUT') ) {
rollback_on_error( $caldav_context, $user_no, $path );
}
if ( !isset($c->readonly_webdav_collections) || $c->readonly_webdav_collections == true ) {
if ( $qry->rows == 0 ) {
$request->DoResponse( 405 ); // Method not allowed
}
return;
}
if ( $qry->rows == 0 ) {
if ( $public == null ) $public = false;
if ( preg_match( '#^(.*/)([^/]+)/$#', $request_container, $matches ) ) {//(
$parent_container = $matches[1];
$displayname = $matches[2];
}
$sql = 'INSERT INTO collection ( user_no, parent_container, dav_name, dav_etag, dav_displayname, is_calendar, created, modified, publicly_readable, resourcetypes ) VALUES( ?, ?, ?, ?, ?, TRUE, current_timestamp, current_timestamp, ?, ? );';
$qry = new PgQuery( $sql, $user_no, $parent_container, $request_container, md5($user_no. $request_container), $displayname, $public, '<DAV::collection/><urn:ietf:params:xml:ns:caldav:calendar/>' );
$qry->Exec('PUT');
}
else if ( isset($public) ) {
$collection = $qry->Fetch();
$qry = new PgQuery( 'UPDATE collection SET publicly_readable = ? WHERE collection_id = ?', $public, $collection->collection_id );
if ( ! $qry->Exec('PUT') ) {
rollback_on_error( $caldav_context, $user_no, $path );
}
}
}
}
/**
* Check if this collection should force all events to be PUBLIC.
* @param string $user_no the user that owns the collection
* @param string $dav_name the collection to check
* @return boolean Return true if public events only are allowed.
*/
function public_events_only( $user_no, $dav_name ) {
global $c;
// Not supported until DB versions from 1.001.010
if ( $c->schema_version < 1001.010 ) return false;
$sql = 'SELECT public_events_only ';
$sql .= 'FROM collection ';
$sql .= 'WHERE user_no=? AND dav_name=?';
$qry = new PgQuery($sql, $user_no, $dav_name);
if( $qry->Exec('PUT') && $qry->rows == 1 ) {
$collection = $qry->Fetch();
if ($collection->public_events_only == 't') {
return true;
}
}
// Something went wrong, must be false.
return false;
}
/**
* Deliver scheduling requests to attendees
* @param iCalComponent $ical the VCALENDAR to deliver
*/
function handle_schedule_request( $ical ) {
global $c, $session, $request;
$resources = $ical->GetComponents('VTIMEZONE',false);
$ic = $resources[0];
$etag = md5 ( $request->raw_post );
$reply = new XMLDocument( array("DAV:" => "", "urn:ietf:params:xml:ns:caldav" => "C" ) );
$responses = array();
$attendees = $ic->GetProperties('ATTENDEE');
$wr_attendees = $ic->GetProperties('X-WR-ATTENDEE');
if ( count ( $wr_attendees ) > 0 ) {
dbg_error_log( "POST", "Non-compliant iCal request. Using X-WR-ATTENDEE property" );
foreach( $wr_attendees AS $k => $v ) {
$attendees[] = $v;
}
}
dbg_error_log( "POST", "Attempting to deliver scheduling request for %d attendees", count($attendees) );
foreach( $attendees AS $k => $attendee ) {
$attendee_email = preg_replace( '/^mailto:/', '', $attendee->Value() );
if ( $attendee_email == $request->principal->email ) {
dbg_error_log( "POST", "not delivering to owner" );
continue;
}
if ( $attendee->GetParameterValue ( 'PARTSTAT' ) != 'NEEDS-ACTION' || preg_match ( '/^[35]\.[3-9]/', $attendee->GetParameterValue ( 'SCHEDULE-STATUS' ) ) ) {
dbg_error_log( "POST", "attendee %s does not need action", $attendee_email );
continue;
}
dbg_error_log( "POST", "Delivering to %s", $attendee_email );
$attendee_principal = new CalDAVPrincipal ( array ('email'=>$attendee_email, 'options'=> array ( 'allow_by_email' => true ) ) );
if ( $attendee_principal == false ){
$attendee->SetParameterValue ('SCHEDULE-STATUS','3.7;Invalid Calendar User');
continue;
}
$deliver_path = preg_replace ( '/^.*caldav.php/','', $attendee_principal->schedule_inbox_url );
$ar = new DAVResource($deliver_path);
$priv = $ar->HavePrivilegeTo('schedule-deliver-invite' );
if ( ! $ar->HavePrivilegeTo('schedule-deliver-invite' ) ){
$reply = new XMLDocument( array('DAV:' => '') );
$privnodes = array( $reply->href(ConstructURL($attendee_principal->schedule_inbox_url)), new XMLElement( 'privilege' ) );
// RFC3744 specifies that we can only respond with one needed privilege, so we pick the first.
$reply->NSElement( $privnodes[1], 'schedule-deliver-invite' );
$xml = new XMLElement( 'need-privileges', new XMLElement( 'resource', $privnodes) );
$xmldoc = $reply->Render('error',$xml);
$request->DoResponse( 403, $xmldoc, 'text/xml; charset="utf-8"');
}
$attendee->SetParameterValue ('SCHEDULE-STATUS','1.2;Scheduling message has been delivered');
$ncal = new iCalComponent ( );
$ncal->VCalendar ();
$ncal->AddProperty ( 'METHOD', 'REQUEST' );
$ncal->AddComponent ( array_merge ( $ical->GetComponents('VEVENT',false) , array ($ic) ));
$content = $ncal->Render();
$cid = $ar->GetProperty('collection_id');
dbg_error_log('DELIVER', 'to user: %s, to path: %s, collection: %s, from user: %s, caldata %s', $attendee_principal->user_no, $deliver_path, $cid, $request->user_no, $content );
write_resource( $attendee_principal->user_no, $deliver_path . $etag . '.ics' ,
$content , $ar->GetProperty('collection_id'), $request->user_no,
md5($content), $ncal, $put_action_type='INSERT', $caldav_context=true, $log_action=true, $etag );
$attendee->SetParameterValue ('SCHEDULE-STATUS','1.2;Scheduling message has been delivered');
}
// don't write an entry in the out box, ical doesn't delete it or ever read it again
//write_resource( $request->user_no, $request->path . $etag . '.ics' ,
// $content , $request->collection_id, $request->user_no,
// md5($content), $ncal, $put_action_type='INSERT', $caldav_context=true, $log_action=true, $etag );
$etag = md5($content);
header('ETag: "'. $etag . '"' );
header('Schedule-Tag: "'.$etag . '"' );
$request->DoResponse( 201, 'Created' );
}
/**
* Deliver scheduling replies to organizer and other attendees
* @param iCalComponent $ical the VCALENDAR to deliver
* @return false on error
*/
function handle_schedule_reply ( $ical ) {
global $c, $session, $request;
$resources = $ical->GetComponents('VTIMEZONE',false);
$ic = $resources[0];
$etag = md5 ( $request->raw_post );
$organizer = $ic->GetProperties('ORGANIZER');
// for now we treat events with out organizers as an error
if ( count ( $organizer ) < 1 )
return false;
$attendees = array_merge($organizer,$ic->GetProperties('ATTENDEE'));
$wr_attendees = $ic->GetProperties('X-WR-ATTENDEE');
if ( count ( $wr_attendees ) > 0 ) {
dbg_error_log( "POST", "Non-compliant iCal request. Using X-WR-ATTENDEE property" );
foreach( $wr_attendees AS $k => $v ) {
$attendees[] = $v;
}
}
dbg_error_log( "POST", "Attempting to deliver scheduling request for %d attendees", count($attendees) );
foreach( $attendees AS $k => $attendee ) {
$attendee_email = preg_replace( '/^mailto:/', '', $attendee->Value() );
dbg_error_log( "POST", "Delivering to %s", $attendee_email );
$attendee_principal = new CalDAVPrincipal ( array ('email'=>$attendee_email, 'options'=> array ( 'allow_by_email' => true ) ) );
$deliver_path = preg_replace ( '/^.*caldav.php/','', $attendee_principal->schedule_inbox_url );
$attendee_email = preg_replace( '/^mailto:/', '', $attendee->Value() );
if ( $attendee_email == $request->principal->email ) {
dbg_error_log( "POST", "not delivering to owner" );
continue;
}
$ar = new DAVResource($deliver_path);
if ( ! $ar->HavePrivilegeTo('schedule-deliver-reply' ) ){
$reply = new XMLDocument( array('DAV:' => '') );
$privnodes = array( $reply->href(ConstructURL($attendee_principal->schedule_inbox_url)), new XMLElement( 'privilege' ) );
// RFC3744 specifies that we can only respond with one needed privilege, so we pick the first.
$reply->NSElement( $privnodes[1], 'schedule-deliver-reply' );
$xml = new XMLElement( 'need-privileges', new XMLElement( 'resource', $privnodes) );
$xmldoc = $reply->Render('error',$xml);
$request->DoResponse( 403, $xmldoc, 'text/xml; charset="utf-8"' );
continue;
}
$ncal = new iCalComponent ( );
$ncal->VCalendar ();
$ncal->AddProperty ( 'METHOD', 'REPLY' );
$ncal->AddComponent ( array_merge ( $ical->GetComponents('VEVENT',false) , array ($ic) ));
$content = $ncal->Render();
write_resource( $attendee_principal->user_no, $deliver_path . $etag . '.ics' ,
$content , $ar->GetProperty('collection_id'), $request->user_no,
md5($content), $ncal, $put_action_type='INSERT', $caldav_context=true, $log_action=true, $etag );
}
$request->DoResponse( 201, 'Created' );
}
/**
* Create a scheduling request in the schedule inbox for the
* @param iCalComponent $resource The VEVENT/VTODO/... resource we are scheduling
* @param iCalProp $attendee The attendee we are scheduling
* @return float The result of the scheduling request, per caldav-sched #3.5.4
*/
function write_scheduling_request( &$resource, $attendee ) {
$response = '5.3;'.translate('No scheduling support for user');
return '"'.$response.'"';
}
/**
* Create scheduling requests in the schedule inbox for the
* @param iCalComponent $resource The VEVENT/VTODO/... resource we are scheduling
*/
function create_scheduling_requests( &$resource ) {
if ( ! is_object($resource) ) {
dbg_error_log( 'PUT', 'create_scheduling_requests called with non-object parameter (%s)', gettype($resource) );
return;
}
$attendees = $resource->GetPropertiesByPath('/VCALENDAR/*/ATTENDEE');
$wr_attendees = $resource->GetPropertiesByPath('/VCALENDAR/*/X-WR-ATTENDEE');
if ( count ( $wr_attendees ) > 0 ) {
dbg_error_log( 'POST', 'Non-compliant iCal request. Using X-WR-ATTENDEE property' );
foreach( $wr_attendees AS $k => $v ) {
$attendees[] = $v;
}
}
if ( count($attendees) == 0 ) {
dbg_error_log( 'PUT', 'Event has no attendees - no scheduling required.', count($attendees) );
return;
}
dbg_error_log( 'PUT', 'Adding to scheduling inbox %d attendees', count($attendees) );
foreach( $attendees AS $attendee ) {
$attendee->SetParameterValue( 'SCHEDULE-STATUS', write_scheduling_request( $resource, $attendee->Value() ) );
}
}
/**
* Update scheduling requests in the schedule inbox for the
* @param iCalComponent $resource The VEVENT/VTODO/... resource we are scheduling
*/
function update_scheduling_requests( &$resource ) {
if ( ! is_object($resource) ) {
dbg_error_log( 'PUT', 'update_scheduling_requests called with non-object parameter (%s)', gettype($resource) );
return;
}
$attendees = $resource->GetPropertiesByPath('/VCALENDAR/*/ATTENDEE');
$wr_attendees = $resource->GetPropertiesByPath('/VCALENDAR/*/X-WR-ATTENDEE');
if ( count ( $wr_attendees ) > 0 ) {
dbg_error_log( 'POST', 'Non-compliant iCal request. Using X-WR-ATTENDEE property' );
foreach( $wr_attendees AS $k => $v ) {
$attendees[] = $v;
}
}
if ( count($attendees) == 0 ) {
dbg_error_log( 'PUT', 'Event has no attendees - no scheduling required.', count($attendees) );
return;
}
dbg_error_log( 'PUT', 'Adding to scheduling inbox %d attendees', count($attendees) );
foreach( $attendees AS $attendee ) {
$attendee->SetParameterValue( 'SCHEDULE-STATUS', write_scheduling_request( $resource, $attendee->Value() ) );
}
}
/**
* This function will import a whole calendar
* @param string $ics_content the ics file to import
* @param int $user_no the user wich will receive this ics file
* @param string $path the $path where it will be store such as /user_foo/home/
* @param boolean $caldav_context Whether we are responding via CalDAV or interactively
*
* Any VEVENTs with the same UID will be concatenated together
*/
function import_collection( $ics_content, $user_no, $path, $caldav_context ) {
global $c, $session, $tz_regex;
if ( ! ini_get('open_basedir') && (isset($c->dbg['ALL']) || isset($c->dbg['put'])) ) {
$fh = fopen('/tmp/PUT-2.txt','w');
if ( $fh ) {
fwrite($fh,$ics_content);
fclose($fh);
}
}
$calendar = new iCalComponent($ics_content);
$timezones = $calendar->GetComponents('VTIMEZONE',true);
$components = $calendar->GetComponents('VTIMEZONE',false);
$displayname = $calendar->GetPValue('X-WR-CALNAME');
if ( isset($displayname) ) {
$sql = 'UPDATE collection SET dav_displayname = ? WHERE dav_name = ?';
$qry = new PgQuery( $sql, $displayname, $path );
if ( ! $qry->Exec('PUT') ) rollback_on_error( $caldav_context, $user_no, $path );
}
$tz_ids = array();
foreach( $timezones AS $k => $tz ) {
$tz_ids[$tz->GetPValue('TZID')] = $k;
}
/** Build an array of resources. Each resource is an array of iCalComponent */
$resources = array();
foreach( $components AS $k => $comp ) {
$uid = $comp->GetPValue('UID');
if ( $uid == null || $uid == '' ) continue;
if ( !isset($resources[$uid]) ) $resources[$uid] = array();
$resources[$uid][] = $comp;
/** Ensure we have the timezone component for this in our array as well */
$tzid = $comp->GetPParamValue('DTSTART', 'TZID');
if ( !isset($tzid) || $tzid == '' ) $tzid = $comp->GetPParamValue('DUE','TZID');
if ( !isset($resources[$uid][$tzid]) && isset($tz_ids[$tzid]) ) {
$resources[$uid][$tzid] = $timezones[$tz_ids[$tzid]];
}
}
$sql = 'SELECT * FROM collection WHERE user_no = ? AND dav_name = ?;';
$qry = new PgQuery( $sql, $user_no, $path );
if ( ! $qry->Exec('PUT') ) rollback_on_error( $caldav_context, $user_no, $path );
if ( ! $qry->rows == 1 ) {
dbg_error_log( 'ERROR', ' PUT: Collection does not exist at "%s" for user %d', $path, $user_no );
rollback_on_error( $caldav_context, $user_no, $path );
}
$collection = $qry->Fetch();
$qry = new PgQuery('BEGIN; DELETE FROM calendar_item WHERE user_no=? AND collection_id = ?; DELETE FROM caldav_data WHERE user_no=? AND collection_id = ?;', $user_no, $collection->collection_id, $user_no, $collection->collection_id);
if ( !$qry->Exec('PUT') ) rollback_on_error( $caldav_context, $user_no, $collection->collection_id );
$last_tz_locn = '';
foreach( $resources AS $uid => $resource ) {
/** Construct the VCALENDAR data */
$vcal = new iCalComponent();
$vcal->VCalendar();
$vcal->SetComponents($resource);
create_scheduling_requests($vcal);
$icalendar = $vcal->Render();
/** As ever, we mostly deal with the first resource component */
$first = $resource[0];
$sql = '';
$etag = md5($icalendar);
$type = $first->GetType();
$resource_path = sprintf( '%s%s.ics', $path, $uid );
$qry = new PgQuery( 'INSERT INTO caldav_data ( user_no, dav_name, dav_etag, caldav_data, caldav_type, logged_user, created, modified, collection_id ) VALUES( ?, ?, ?, ?, ?, ?, current_timestamp, current_timestamp, ? )',
$user_no, $resource_path, $etag, $icalendar, $type, $session->user_no, $collection->collection_id );
if ( !$qry->Exec('PUT') ) rollback_on_error( $caldav_context, $user_no, $path );
$dtstart = $first->GetPValue('DTSTART');
if ( (!isset($dtstart) || $dtstart == '') && $first->GetPValue('DUE') != '' ) {
$dtstart = $first->GetPValue('DUE');
}
$dtend = $first->GetPValue('DTEND');
if ( (!isset($dtend) || $dtend == '') ) {
if ( $first->GetPValue('DURATION') != '' AND $dtstart != '' ) {
$duration = preg_replace( '#[PT]#', ' ', $first->GetPValue('DURATION') );
$dtend = '('.qpg($dtstart).'::timestamp with time zone + '.qpg($duration).'::interval)';
}
elseif ( $first->GetType() == 'VEVENT' ) {
/**
* From RFC2445 4.6.1:
* For cases where a "VEVENT" calendar component specifies a "DTSTART"
* property with a DATE data type but no "DTEND" property, the events
* non-inclusive end is the end of the calendar date specified by the
* "DTSTART" property. For cases where a "VEVENT" calendar component specifies
* a "DTSTART" property with a DATE-TIME data type but no "DTEND" property,
* the event ends on the same calendar date and time of day specified by the
* "DTSTART" property.
*
* So we're looking for 'VALUE=DATE', to identify the duration, effectively.
*
*/
$value_type = $first->GetPParamValue('DTSTART','VALUE');
dbg_error_log('PUT','DTSTART without DTEND. DTSTART value type is %s', $value_type );
if ( isset($value_type) && $value_type == 'DATE' )
$dtend = '('.qpg($dtstart).'::timestamp with time zone::date + \'1 day\'::interval)';
else
$dtend = qpg($dtstart);
}
if ( $dtend == '' ) $dtend = 'NULL';
}
else {
dbg_error_log( 'PUT', ' DTEND: "%s", DTSTART: "%s", DURATION: "%s"', $dtend, $dtstart, $first->GetPValue('DURATION') );
$dtend = qpg($dtend);
}
$last_modified = $first->GetPValue('LAST-MODIFIED');
if ( !isset($last_modified) || $last_modified == '' ) $last_modified = gmdate( 'Ymd\THis\Z' );
$dtstamp = $first->GetPValue('DTSTAMP');
if ( !isset($dtstamp) || $dtstamp == '' ) $dtstamp = $last_modified;
/** RFC2445, 4.8.1.3: Default is PUBLIC, or also if overridden by the collection settings */
$class = ($collection->public_events_only == 't' ? 'PUBLIC' : $first->GetPValue('CLASS') );
if ( !isset($class) || $class == '' ) $class = 'PUBLIC';
/** Calculate what timezone to set, first, if possible */
$tzid = $first->GetPParamValue('DTSTART','TZID');
if ( !isset($tzid) || $tzid == '' ) $tzid = $first->GetPParamValue('DUE','TZID');
if ( isset($tzid) && $tzid != '' ) {
if ( isset($resource[$tzid]) ) {
$tz = $resource[$tzid];
$tz_locn = $tz->GetPValue('X-LIC-LOCATION');
}
else {
unset($tz);
unset($tz_locn);
}
if ( ! isset($tz_locn) || ! preg_match( $tz_regex, $tz_locn ) ) {
if ( preg_match( '#([^/]+/[^/]+)$#', $tzid, $matches ) ) {
$tz_locn = $matches[1];
}
}
dbg_error_log( 'PUT', ' Using TZID[%s] and location of [%s]', $tzid, (isset($tz_locn) ? $tz_locn : '') );
if ( isset($tz_locn) && ($tz_locn != $last_tz_locn) && preg_match( $tz_regex, $tz_locn ) ) {
dbg_error_log( 'PUT', ' Setting timezone to %s', $tz_locn );
$sql .= ( $tz_locn == '' ? '' : 'SET TIMEZONE TO '.qpg($tz_locn).';' );
$last_tz_locn = $tz_locn;
}
$qry = new PgQuery('SELECT tz_locn FROM time_zone WHERE tz_id = ?', $tzid );
if ( $qry->Exec() && $qry->rows == 0 ) {
$qry = new PgQuery('INSERT INTO time_zone (tz_id, tz_locn, tz_spec) VALUES(?,?,?)', $tzid, $tz_locn, (isset($tz) ? $tz->Render() : null) );
$qry->Exec();
}
if ( !isset($tz_locn) || $tz_locn == '' ) $tz_locn = $tzid;
}
else {
$tzid = null;
}
$sql .= <<<EOSQL
INSERT INTO calendar_item (user_no, dav_name, dav_id, dav_etag, uid, dtstamp, dtstart, dtend, summary, location, class, transp,
description, rrule, tz_id, last_modified, url, priority, created, due, percent_complete, status, collection_id )
VALUES ( ?, ?, currval('dav_id_seq'), ?, ?, ?, ?, $dtend, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?);
EOSQL;
$qry = new PgQuery( $sql, $user_no, $resource_path, $etag, $first->GetPValue('UID'), $dtstamp,
$first->GetPValue('DTSTART'), $first->GetPValue('SUMMARY'), $first->GetPValue('LOCATION'),
$class, $first->GetPValue('TRANSP'), $first->GetPValue('DESCRIPTION'), $first->GetPValue('RRULE'), $tzid,
$last_modified, $first->GetPValue('URL'), $first->GetPValue('PRIORITY'), $first->GetPValue('CREATED'),
$first->GetPValue('DUE'), $first->GetPValue('PERCENT-COMPLETE'), $first->GetPValue('STATUS'), $collection->collection_id
);
if ( !$qry->Exec('PUT') ) rollback_on_error( $caldav_context, $user_no, $path);
create_scheduling_requests( $vcal );
}
$qry = new PgQuery('COMMIT;');
if ( !$qry->Exec('PUT') ) rollback_on_error( $caldav_context, $user_no, $path);
}
/**
* Put the resource from this request - does some checking of things before
* calling write_event to do the actual writing (without any checking).
* @param object $request A reference to the request object
* @param int $author The user_no who wants to put this resource on the server
* @param boolean $caldav_context Whether we are responding via CalDAV or interactively
* @return string Either 'INSERT' or 'UPDATE': the type of action that the PUT resulted in
*/
function putCalendarResource( &$request, $author, $caldav_context ) {
$etag = md5($request->raw_post);
$ic = new iCalComponent( $request->raw_post );
dbg_log_array( 'PUT', 'EVENT', $ic->components, true );
/**
* We read any existing object so we can check the ETag.
*/
unset($put_action_type);
$qry = new PgQuery( 'SELECT * FROM caldav_data WHERE user_no=? AND dav_name=?', $request->user_no, $request->path );
if ( !$qry->Exec('PUT') || $qry->rows > 1 ) {
rollback_on_error( $caldav_context, $request->user_no, $request->path );
}
elseif ( $qry->rows < 1 ) {
if ( isset($request->etag_if_match) && $request->etag_if_match != '' ) {
/**
* RFC2068, 14.25:
* If none of the entity tags match, or if "*" is given and no current
* entity exists, the server MUST NOT perform the requested method, and
* MUST return a 412 (Precondition Failed) response.
*/
rollback_on_error( $caldav_context, $request->user_no, $request->path, translate('Resource changed on server - not changed.'), 412 );
}
$put_action_type = 'INSERT';
if ( ! $request->AllowedTo('create') ) {
rollback_on_error( $caldav_context, $request->user_no, $request->path, translate('You may not add entries to this calendar.'), 403 );
}
}
elseif ( $qry->rows == 1 ) {
$icalendar = $qry->Fetch();
if ( ( isset($request->etag_if_match) && $request->etag_if_match != '' && $request->etag_if_match != $icalendar->dav_etag )
|| ( isset($request->etag_none_match) && $request->etag_none_match != '' && ($request->etag_none_match == $icalendar->dav_etag || $request->etag_none_match == '*') ) ) {
/**
* RFC2068, 14.25:
* If none of the entity tags match, or if "*" is given and no current
* entity exists, the server MUST NOT perform the requested method, and
* MUST return a 412 (Precondition Failed) response.
*
* RFC2068, 14.26:
* If any of the entity tags match the entity tag of the entity that
* would have been returned in the response to a similar GET request
* (without the If-None-Match header) on that resource, or if "*" is
* given and any current entity exists for that resource, then the
* server MUST NOT perform the requested method.
*/
if ( isset($request->etag_if_match) && $request->etag_if_match != $icalendar->dav_etag ) {
$error = translate( 'Existing resource does not match "If-Match" header - not accepted.');
}
if ( isset($request->etag_none_match) && $request->etag_none_match != '' && ($request->etag_none_match == $icalendar->dav_etag || $request->etag_none_match == '*') ) {
$error = translate( 'Existing resource matches "If-None-Match" header - not accepted.');
}
$request->DoResponse( 412, $error );
}
$put_action_type = 'UPDATE';
if ( ! $request->AllowedTo('modify') ) {
$request->DoResponse( 403, translate('You may not modify entries on this calendar.') );
}
}
write_resource( $request->user_no, $request->path, $request->raw_post, $request->collection_id,
$author, $etag, $ic, $put_action_type, $caldav_context, $log_action=true );
if ( $caldav_context ) {
header(sprintf('ETag: "%s"', $etag) );
}
return $put_action_type;
}
/**
* Actually write the resource to the database. All checking of whether this is reasonable
* should be done before this is called.
* @param int $user_no The user_no owning this resource on the server
* @param string $path The path to the resource being written
* @param string $caldav_data The actual resource to be written
* @param int $collection_id The ID of the collection containing the resource being written
* @param int $author The user_no who wants to put this resource on the server
* @param string $etag An etag unique for this event
* @param object $ic The parsed iCalendar object
* @param string $put_action_type INSERT or UPDATE depending on what we are to do
* @param boolean $caldav_context True, if we are responding via CalDAV, false for other ways of calling this
* @param string Either 'INSERT' or 'UPDATE': the type of action we are doing
* @param boolean $log_action Whether to log the fact that we are writing this into an action log (if configured)
* @param string $weak_etag An etag that is NOT modified on ATTENDEE changes for this event
* @return boolean True for success, false for failure.
*/
function write_resource( $user_no, $path, $caldav_data, $collection_id, $author, $etag, $ic, $put_action_type, $caldav_context, $log_action=true, $weak_etag=null ) {
global $tz_regex;
$resources = $ic->GetComponents('VTIMEZONE',false); // Not matching VTIMEZONE
if ( !isset($resources[0]) ) {
$resource_type = 'Unknown';
/** @TODO: Handle writing non-calendar resources, like address book entries or random file data */
rollback_on_error( $caldav_context, $user_no, $path, translate('No calendar content'), 412 );
return false;
}
else {
$first = $resources[0];
$resource_type = $first->GetType();
}
if ( $put_action_type == 'INSERT' ) {
create_scheduling_requests($vcal);
$qry = new PgQuery( 'BEGIN; INSERT INTO caldav_data ( user_no, dav_name, dav_etag, caldav_data, caldav_type, logged_user, created, modified, collection_id, weak_etag ) VALUES( ?, ?, ?, ?, ?, ?, current_timestamp, current_timestamp, ?, ? )',
$user_no, $path, $etag, $caldav_data, $resource_type, $author, $collection_id, $weak_etag );
if ( !$qry->Exec('PUT') ) {
rollback_on_error( $caldav_context, $user_no, $path);
return false;
}
}
else {
update_scheduling_requests($vcal);
$qry = new PgQuery( 'BEGIN;UPDATE caldav_data SET caldav_data=?, dav_etag=?, caldav_type=?, logged_user=?, modified=current_timestamp WHERE user_no=? AND dav_name=?',
$caldav_data, $etag, $resource_type, $author, $user_no, $path );
if ( !$qry->Exec('PUT') ) {
rollback_on_error( $caldav_context, $user_no, $path);
return false;
}
}
$dtstart = $first->GetPValue('DTSTART');
if ( (!isset($dtstart) || $dtstart == '') && $first->GetPValue('DUE') != '' ) {
$dtstart = $first->GetPValue('DUE');
}
$dtend = $first->GetPValue('DTEND');
if ( (!isset($dtend) || $dtend == '') ) {
if ( $first->GetPValue('DURATION') != '' AND $dtstart != '' ) {
$duration = preg_replace( '#[PT]#', ' ', $first->GetPValue('DURATION') );
$dtend = '('.qpg($dtstart).'::timestamp with time zone + '.qpg($duration).'::interval)';
}
elseif ( $first->GetType() == 'VEVENT' ) {
/**
* From RFC2445 4.6.1:
* For cases where a "VEVENT" calendar component specifies a "DTSTART"
* property with a DATE data type but no "DTEND" property, the events
* non-inclusive end is the end of the calendar date specified by the
* "DTSTART" property. For cases where a "VEVENT" calendar component specifies
* a "DTSTART" property with a DATE-TIME data type but no "DTEND" property,
* the event ends on the same calendar date and time of day specified by the
* "DTSTART" property.
*
* So we're looking for 'VALUE=DATE', to identify the duration, effectively.
*
*/
$value_type = $first->GetPParamValue('DTSTART','VALUE');
dbg_error_log('PUT','DTSTART without DTEND. DTSTART value type is %s', $value_type );
if ( isset($value_type) && $value_type == 'DATE' )
$dtend = '('.qpg($dtstart).'::timestamp with time zone::date + \'1 day\'::interval)';
else
$dtend = qpg($dtstart);
}
if ( $dtend == '' ) $dtend = 'NULL';
}
else {
dbg_error_log( 'PUT', ' DTEND: "%s", DTSTART: "%s", DURATION: "%s"', $dtend, $dtstart, $first->GetPValue('DURATION') );
$dtend = qpg($dtend);
}
$last_modified = $first->GetPValue('LAST-MODIFIED');
if ( !isset($last_modified) || $last_modified == '' ) {
$last_modified = gmdate( 'Ymd\THis\Z' );
}
$dtstamp = $first->GetPValue('DTSTAMP');
if ( !isset($dtstamp) || $dtstamp == '' ) {
$dtstamp = $last_modified;
}
$class = $first->GetPValue('CLASS');
/* Check and see if we should over ride the class. */
/** @TODO: is there some way we can move this out of this function? Or at least get rid of the need for the SQL query here. */
if ( public_events_only($user_no, $path) ) {
$class = 'PUBLIC';
}
/*
* It seems that some calendar clients don't set a class...
* RFC2445, 4.8.1.3:
* Default is PUBLIC
*/
if ( !isset($class) || $class == '' ) {
$class = 'PUBLIC';
}
/**
* Build the SQL for inserting/updating the calendar_item record
*/
$sql = '';
/** Calculate what timezone to set, first, if possible */
$tzid = $first->GetPParamValue('DTSTART','TZID');
if ( !isset($tzid) || $tzid == '' ) $tzid = $first->GetPParamValue('DUE','TZID');
$timezones = $ic->GetComponents('VTIMEZONE');
foreach( $timezones AS $k => $tz ) {
if ( $tz->GetPValue('TZID') != $tzid ) {
/**
* We'll pretend they didn't forget to give us a TZID and that they
* really hope the server is running in the timezone they supplied... but be noisy about it.
*/
dbg_error_log( 'ERROR', ' Event includes TZID[%s] but users TZID[%s]!', $tz->GetPValue('TZID'), $tzid );
$tzid = $tz->GetPValue('TZID');
}
// This is the one
$tz_locn = $tz->GetPValue('X-LIC-LOCATION');
if ( ! isset($tz_locn) ) {
if ( preg_match( '#([^/]+/[^/]+)$#', $tzid, $matches ) )
$tz_locn = $matches[1];
else {
dbg_error_log( 'ERROR', ' Couldn\'t guess Olsen TZ from TZID[%s]. This may end in tears...', $tzid );
}
}
else {
if ( ! preg_match( $tz_regex, $tz_locn ) ) {
if ( preg_match( '#([^/]+/[^/]+)$#', $tzid, $matches ) ) $tz_locn = $matches[1];
}
}
dbg_error_log( 'PUT', ' Using TZID[%s] and location of [%s]', $tzid, $tz_locn );
if ( isset($tz_locn) && preg_match( $tz_regex, $tz_locn ) ) {
dbg_error_log( 'PUT', ' Setting timezone to %s', $tz_locn );
$sql = ( $tz_locn == '' ? '' : 'SET TIMEZONE TO '.qpg($tz_locn).';' );
}
$qry = new PgQuery('SELECT tz_locn FROM time_zone WHERE tz_id = ?', $tzid );
if ( $qry->Exec() && $qry->rows == 0 ) {
$qry = new PgQuery('INSERT INTO time_zone (tz_id, tz_locn, tz_spec) VALUES(?,?,?)', $tzid, $tz_locn, $tz->Render() );
$qry->Exec();
}
if ( !isset($tz_locn) || $tz_locn == '' ) {
$tz_locn = $tzid;
}
}
$escaped_path = qpg($path);
if ( $put_action_type != 'INSERT' ) {
$sql .= <<<EOSQL
UPDATE calendar_item SET dav_etag=?, uid=?, dtstamp=?,
dtstart=?, dtend=$dtend, summary=?, location=?, class=?, transp=?,
description=?, rrule=?, tz_id=?, last_modified=?, url=?, priority=?,
created=?, due=?, percent_complete=?, status=?
WHERE user_no=$user_no AND dav_name=$escaped_path;
SELECT write_sync_change( $collection_id, 200, $escaped_path);
COMMIT;
EOSQL;
}
else {
$sql .= <<<EOSQL
INSERT INTO calendar_item (user_no, dav_name, dav_id, dav_etag, uid, dtstamp,
dtstart, dtend, summary, location, class, transp,
description, rrule, tz_id, last_modified, url, priority,
created, due, percent_complete, status, collection_id )
VALUES ( $user_no, $escaped_path, currval('dav_id_seq'), ?, ?, ?,
?, $dtend, ?, ?, ?, ?,
?, ?, ?, ?, ?, ?,
?, ?, ?, ?, $collection_id );
SELECT write_sync_change( $collection_id, 201, $escaped_path);
COMMIT;
EOSQL;
}
if ( $log_action && function_exists('log_caldav_action') ) {
log_caldav_action( $put_action_type, $first->GetPValue('UID'), $user_no, $collection_id, $path );
}
$qry = new PgQuery( $sql, $etag, $first->GetPValue('UID'), $dtstamp,
$first->GetPValue('DTSTART'), $first->GetPValue('SUMMARY'), $first->GetPValue('LOCATION'), $class, $first->GetPValue('TRANSP'),
$first->GetPValue('DESCRIPTION'), $first->GetPValue('RRULE'), $tzid,
$last_modified, $first->GetPValue('URL'), $first->GetPValue('PRIORITY'),
$first->GetPValue('CREATED'), $first->GetPValue('DUE'), $first->GetPValue('PERCENT-COMPLETE'), $first->GetPValue('STATUS')
);
if ( !$qry->Exec('PUT') ) {
rollback_on_error( $caldav_context, $user_no, $path);
return false;
}
dbg_error_log( 'PUT', 'User: %d, ETag: %s, Path: %s', $author, $etag, $path);
return true; // Success!
}
/**
* A slightly simpler version of write_resource which will make more sense for calling from
* an external program. This makes assumptions that the collection and user do exist
* and bypasses all checks for whether it is reasonable to write this here.
* @param string $path The path to the resource being written
* @param string $caldav_data The actual resource to be written
* @param string $put_action_type INSERT or UPDATE depending on what we are to do
* @return boolean True for success, false for failure.
*/
function simple_write_resource( $path, $caldav_data, $put_action_type ) {
$etag = md5($caldav_data);
$ic = new iCalComponent( $caldav_data );
/**
* We pull the user_no & collection_id out of the collection table, based on the resource path
*/
$collection_path = preg_replace( '#/[^/]*$#', '/', $path );
$qry = new PgQuery( 'SELECT user_no, collection_id FROM collection WHERE dav_name = ? ', $collection_path );
if ( $qry->Exec('PUT:simple_write_resource') && $qry->rows == 1 ) {
$collection = $qry->Fetch();
$user_no = $collection->user_no;
return write_resource( $user_no, $path, $caldav_data, $collection->collection_id, $user_no, $etag, $ic, $put_action_type, false, false );
}
return false;
}
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