mirror of
https://gitlab.com/davical-project/davical.git
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471 lines
19 KiB
PHP
471 lines
19 KiB
PHP
<?php
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/**
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* CalDAV Server - handle PUT method
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*
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* @package davical
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* @subpackage caldav
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* @author Andrew McMillan <andrew@morphoss.com>
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* @copyright Morphoss Ltd - http://www.morphoss.com/
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* @license http://gnu.org/copyleft/gpl.html GNU GPL v2 or later version
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*/
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/**
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* Check if the user wants to put just one VEVENT/VTODO or a whole calendar
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* if the collection = calendar = $request_container doesn't exist then create it
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* return true if it's a whole calendar
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*/
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include_once("iCalendar.php");
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/**
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* This function launches an error
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* @param boolean $caldav_context Whether we are responding via CalDAV or interactively
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* @param int $user_no the user wich will receive this ics file
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* @param string $path the $path where the PUT failed to store such as /user_foo/home/
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* @param string $message An optional error message to return to the client
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* @param int $error_no An optional value for the HTTP error code
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*/
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function rollback_on_error( $caldav_context, $user_no, $path, $message='', $error_no=500 ) {
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if ( !$message ) $message = translate("Database error");
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$qry = new PgQuery("ROLLBACK;"); $qry->Exec("PUT-collection");
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if ( $caldav_context ) {
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global $request;
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$request->DoResponse( $error_no, $message );
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}
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else {
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global $c;
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$c->messages[] = sprintf("Status: %d, Message: %s, User: %d, Path: %s", $error_no, $message, $user_no, $path);
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}
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}
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/**
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* Work out the location we are doing the PUT to, and check that we have the rights to
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* do the needful.
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* @param string $username The name of the destination user
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* @param int $user_no The user making the change
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* @param string $path The DAV path the resource is bing PUT to
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* @param boolean $caldav_context Whether we are responding via CalDAV or interactively
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*/
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function controlRequestContainer( $username, $user_no, $path, $caldav_context ) {
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// Check to see if the path is like /foo /foo/bar or /foo/bar/baz etc. (not ending with a '/', but contains at least one)
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if ( preg_match( '#^(.*/)([^/]+)$#', $path, $matches ) ) {//(
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$request_container = $matches[1]; // get everything up to the last '/'
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$is_collection = false; // get after the last '/'
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}
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else {
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// In this case we must have a URL with a trailing '/', so it must be a collection.
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$request_container = $path;
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$is_collection = true;
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}
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/**
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* Before we write the event, we check the container exists, creating it if it doesn't
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*/
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if ( $request_container == "/$username/" ) {
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/**
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* Well, it exists, and we support it, but it is against the CalDAV spec
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*/
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dbg_error_log( "WARN", " Storing events directly in user's base folders is not recommended!");
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}
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else {
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$sql = "SELECT * FROM collection WHERE user_no = ? AND dav_name = ?;";
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$qry = new PgQuery( $sql, $user_no, $request_container );
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if ( ! $qry->Exec("PUT") ) {
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rollback_on_error( $caldav_context, $user_no, $path );
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}
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if ( $qry->rows == 0 ) {
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if ( preg_match( '#^(.*/)([^/]+)/$#', $request_container, $matches ) ) {//(
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$parent_container = $matches[1];
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$displayname = $matches[2];
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}
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$sql = "INSERT INTO collection ( user_no, parent_container, dav_name, dav_etag, dav_displayname, is_calendar, created, modified ) VALUES( ?, ?, ?, ?, ?, TRUE, current_timestamp, current_timestamp );";
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$qry = new PgQuery( $sql, $user_no, $parent_container, $request_container, md5($user_no. $request_container), $displayname );
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$qry->Exec("PUT");
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}
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}
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//I don't think useful because there is already a $request->IsCollection() that does the job
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//Andrew If you think it's unuseful then remove $is_collection in this function
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return $is_collection;
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}
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/**
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* Check if this collection should force all events to be PUBLIC.
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* @param string $user_no the user that owns the collection
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* @param string $dav_name the collection to check
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* @return boolean Return true if public events only are allowed.
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*/
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function public_events_only( $user_no, $dav_name ) {
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global $c;
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// Not supported until DB versions from 1.001.010
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if ( $c->schema_version < 1001.010 ) return false;
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$sql = "SELECT public_events_only ";
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$sql .= "FROM collection ";
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$sql .= "WHERE user_no=? AND dav_name=?";
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$qry = new PgQuery($sql, $user_no, $dav_name);
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if( $qry->Exec('PUT') && $qry->rows == 1 ) {
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$collection = $qry->Fetch();
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if ($collection->public_events_only == 't') {
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return true;
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}
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}
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// Something went wrong, must be false.
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return false;
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}
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/**
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* Create scheduling requests in the schedule inbox for the
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* @param iCalendar $ic The iCalendar object we should create scheduling requests for.
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*/
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function create_scheduling_requests( $ic ) {
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$component =& $ic->component->FirstNonTimezone();
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$attendees = $component->GetProperties('ATTENDEE');
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if ( preg_match( '# iCal/\d#', $_SERVER['HTTP_USER_AGENT']) ) {
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dbg_error_log( "POST", "Non-compliant iCal request. Using X-WR-ATTENDEE property" );
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$wr_attendees = $component->GetProperties('X-WR-ATTENDEE');
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foreach( $wr_attendees AS $k => $v ) {
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$attendees[] = $v;
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}
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}
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dbg_error_log( "PUT", "Adding to scheduling inbox %d attendees", count($attendees) );
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foreach( $attendees AS $attendee ) {
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dbg_error_log( "PUT", "Not yet adding to schedule-inbox for %s", $attendee->Value() );
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}
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}
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/**
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* This function will import a whole calendar
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* @param string $ics_content the ics file to import
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* @param int $user_no the user wich will receive this ics file
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* @param string $path the $path where it will be store such as /user_foo/home/
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* @param boolean $caldav_context Whether we are responding via CalDAV or interactively
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*
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* Any VEVENTs with the same UID will be concatenated together
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*/
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function import_collection( $ics_content, $user_no, $path, $caldav_context ) {
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global $c, $session;
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// According to RFC2445 we should always end with CRLF, but the CalDAV spec says
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// that normalising XML parsers often muck with it and may remove the CR.
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$icalendar = preg_replace('/\r?\n /', '', $ics_content );
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if ( ! ini_get('open_basedir') && (isset($c->dbg['ALL']) || isset($c->dbg['put'])) ) {
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$fh = fopen('/tmp/PUT-2.txt','w');
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if ( $fh ) {
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fwrite($fh,$icalendar);
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fclose($fh);
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}
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}
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$lines = preg_split('/\r?\n/', $icalendar );
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$events = array();
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$event_ids = array();
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$timezones = array();
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$current = "";
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unset($event_id);
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$state = "";
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$tzid = 'unknown';
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foreach( $lines AS $lno => $line ) {
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if ( $state == "" ) {
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if ( preg_match( '/^BEGIN:(VEVENT|VTIMEZONE|VTODO|VJOURNAL)$/', $line, $matches ) ) {
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$current .= $line."\n";
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$state = $matches[1];
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dbg_error_log( "PUT", "CalendarLine[%04d] - %s: %s", $lno, $state, $line );
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}
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}
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else {
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$current .= $line."\n";
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if ( preg_match( '/^UID:(.*)$/', $line, &$matches) ) {
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$event_id = $matches[1];
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dbg_error_log( "PUT", " Processing event with UID of '%s'", $event_id );
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}
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else if ( $line == "END:$state" ) {
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switch ( $state ) {
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case 'VTIMEZONE':
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$timezones[$tzid] = $current;
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dbg_error_log( "PUT", " Ended VTIMEZONE for TZID '%s' ", $tzid );
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break;
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case 'VEVENT':
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case 'VTODO':
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case 'VJOURNAL':
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default:
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if ( isset($event_ids[$event_id]) ) {
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// All of the VEVENT (or whatever) with the same UID are concatenated
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$events[$event_ids[$event_id]]['data'] .= $current;
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}
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else if ( isset($event_id) ) {
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$event_ids[$event_id] = count($events);
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$events[] = array( 'data' => $current, 'tzid' => $tzid );
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}
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unset($event_id);
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dbg_error_log( "PUT", " Ended %s with TZID '%s' ", $state, $tzid );
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break;
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}
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$state = "";
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$current = "";
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$tzid = 'unknown';
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}
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else if ( preg_match( '/TZID[:=]([^:]+)(:|$)/', $line, $matches ) ) {
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$tzid = $matches[1];
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dbg_error_log( "PUT", " Found TZID of '%s' in '%s'", $tzid, $line );
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}
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}
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}
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dbg_error_log( "PUT", " Finished input after $lno lines" );
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$sql = "SELECT * FROM collection WHERE user_no = ? AND dav_name = ?;";
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$qry = new PgQuery( $sql, $user_no, $path );
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if ( ! $qry->Exec("PUT") ) rollback_on_error( $caldav_context, $user_no, $path );
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if ( ! $qry->rows == 1 ) {
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dbg_error_log( "ERROR", " PUT: Collection does not exist at '%s' for user %d", $path, $user_no );
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rollback_on_error( $caldav_context, $user_no, $path );
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}
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$collection = $qry->Fetch();
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$qry = new PgQuery("BEGIN; DELETE FROM calendar_item WHERE user_no=? AND dav_name ~ ?; DELETE FROM caldav_data WHERE user_no=? AND dav_name ~ ?;", $user_no, $path.'[^/]+$', $user_no, $path.'[^/]+$');
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if ( !$qry->Exec("PUT") ) rollback_on_error( $caldav_context, $user_no, $path );
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foreach( $events AS $k => $event ) {
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dbg_error_log( "PUT", "Putting event %d with data: %s", $k, $event['data'] );
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$icalendar = iCalendar::iCalHeader() . $event['data'] . (isset($timezones[$event['tzid']])?$timezones[$event['tzid']]:"") . iCalendar::iCalFooter();
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$ic = new iCalendar( array( 'icalendar' => $icalendar ) );
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$etag = md5($icalendar);
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$event_path = sprintf( "%s%d.ics", $path, $k);
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$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, ? )",
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$user_no, $event_path, $etag, $icalendar, $ic->type, $session->user_no, $collection->collection_id );
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if ( !$qry->Exec("PUT") ) rollback_on_error( $caldav_context, $user_no, $path );
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$sql = "";
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if ( preg_match(':^(Africa|America|Antarctica|Arctic|Asia|Atlantic|Australia|Brazil|Canada|Chile|Etc|Europe|Indian|Mexico|Mideast|Pacific|US)/[a-z]+$:i', $ic->tz_locn ) ) {
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// We only set the timezone if it looks reasonable enough for us
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$sql = ( $ic->tz_locn == '' ? '' : "SET TIMEZONE TO ".qpg($ic->tz_locn).";" );
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}
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$dtstart = $ic->Get('dtstart');
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if ( (!isset($dtstart) || $dtstart == "") && $ic->Get('due') != "" ) {
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$dtstart = $ic->Get('due');
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}
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$dtend = $ic->Get('dtend');
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if ( (!isset($dtend) || "$dtend" == "") && $ic->Get('duration') != "" AND $dtstart != "" ) {
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$duration = preg_replace( '#[PT]#', ' ', $ic->Get('duration') );
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$dtend = '('.qpg($dtstart).'::timestamp with time zone + '.qpg($duration).'::interval)';
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}
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else {
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dbg_error_log( "PUT", " DTEND: '%s', DTSTART: '%s', DURATION: '%s'", $dtend, $dtstart, $ic->Get('duration') );
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$dtend = qpg($dtend);
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}
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$last_modified = $ic->Get("last-modified");
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if ( !isset($last_modified) || $last_modified == '' ) {
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$last_modified = gmdate( 'Ymd\THis\Z' );
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}
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$dtstamp = $ic->Get("dtstamp");
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if ( !isset($dtstamp) || $dtstamp == '' ) {
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$dtstamp = $last_modified;
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}
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$class = $ic->Get("class");
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/* Check and see if we should over ride the class. */
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if ( public_events_only($user_no, $path) ) {
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$class = 'PUBLIC';
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}
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/*
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* It seems that some calendar clients don't set a class...
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* RFC2445, 4.8.1.3:
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* Default is PUBLIC
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*/
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if ( !isset($class) || $class == '' ) {
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$class = 'PUBLIC';
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}
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$sql .= <<<EOSQL
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INSERT INTO calendar_item (user_no, dav_name, dav_etag, uid, dtstamp, dtstart, dtend, summary, location, class, transp,
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description, rrule, tz_id, last_modified, url, priority, created, due, percent_complete, collection_id )
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VALUES ( ?, ?, ?, ?, ?, ?, $dtend, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?);
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EOSQL;
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$qry = new PgQuery( $sql, $user_no, $event_path, $etag, $ic->Get('uid'), $dtstamp,
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$ic->Get('dtstart'), $ic->Get('summary'), $ic->Get('location'),
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$class, $ic->Get('transp'), $ic->Get('description'), $ic->Get('rrule'), $ic->Get('tz_id'),
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$last_modified, $ic->Get('url'), $ic->Get('priority'), $ic->Get('created'),
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$ic->Get('due'), $ic->Get('percent-complete'), $collection->collection_id
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);
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if ( !$qry->Exec("PUT") ) rollback_on_error( $caldav_context, $user_no, $path);
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create_scheduling_requests( $ic );
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}
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$qry = new PgQuery("COMMIT;");
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if ( !$qry->Exec("PUT") ) rollback_on_error( $caldav_context, $user_no, $path);
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}
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/**
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* Put the resource from this request
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* @param object $request A reference to the request object
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* @param int $author The user_no who wants to put this resource on the server
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* @param boolean $caldav_context Whether we are responding via CalDAV or interactively
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* @return string Either 'INSERT' or 'UPDATE': the type of action that the PUT resulted in
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*/
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function putCalendarResource( &$request, $author, $caldav_context ) {
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$etag = md5($request->raw_post);
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$ic = new iCalendar(array( 'icalendar' => $request->raw_post ));
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dbg_log_array( "PUT", 'EVENT', $ic->properties['VCALENDAR'][0], true );
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/**
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* We read any existing object so we can check the ETag.
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*/
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unset($put_action_type);
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$qry = new PgQuery( "SELECT * FROM caldav_data WHERE user_no=? AND dav_name=?", $request->user_no, $request->path );
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if ( !$qry->Exec("PUT") || $qry->rows > 1 ) {
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rollback_on_error( $caldav_context, $request->user_no, $request->path );
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}
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elseif ( $qry->rows < 1 ) {
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if ( isset($request->etag_if_match) && $request->etag_if_match != '' ) {
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/**
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* RFC2068, 14.25:
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* If none of the entity tags match, or if "*" is given and no current
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* entity exists, the server MUST NOT perform the requested method, and
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* MUST return a 412 (Precondition Failed) response.
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*/
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rollback_on_error( $caldav_context, $request->user_no, $request->path, 412, translate("Resource changed on server - not changed.") );
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}
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$put_action_type = 'INSERT';
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if ( ! $request->AllowedTo("create") ) {
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rollback_on_error( $caldav_context, $request->user_no, $request->path, 403, translate("You may not add entries to this calendar.") );
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}
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}
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elseif ( $qry->rows == 1 ) {
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$icalendar = $qry->Fetch();
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if ( ( isset($request->etag_if_match) && $request->etag_if_match != '' && $request->etag_if_match != $icalendar->dav_etag )
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|| ( isset($request->etag_none_match) && $request->etag_none_match != '' && ($request->etag_none_match == $icalendar->dav_etag || $request->etag_none_match == '*') ) ) {
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/**
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* RFC2068, 14.25:
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* If none of the entity tags match, or if "*" is given and no current
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* entity exists, the server MUST NOT perform the requested method, and
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* MUST return a 412 (Precondition Failed) response.
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*
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* RFC2068, 14.26:
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* If any of the entity tags match the entity tag of the entity that
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* would have been returned in the response to a similar GET request
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* (without the If-None-Match header) on that resource, or if "*" is
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* given and any current entity exists for that resource, then the
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* server MUST NOT perform the requested method.
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*/
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if ( isset($request->etag_if_match) && $request->etag_if_match != $icalendar->dav_etag ) {
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$error = translate( "Existing resource does not match 'If-Match' header - not accepted.");
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}
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if ( isset($etag_none_match) && $etag_none_match != '' && ($etag_none_match == $icalendar->dav_etag || $etag_none_match == '*') ) {
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$error = translate( "Existing resource matches 'If-None-Match' header - not accepted.");
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}
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$request->DoResponse( 412, $error );
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}
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$put_action_type = 'UPDATE';
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if ( ! $request->AllowedTo("modify") ) {
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$request->DoResponse( 403, translate("You may not modify entries on this calendar.") );
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}
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}
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if ( $put_action_type == 'INSERT' ) {
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$qry = new PgQuery( "BEGIN; 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, ? )",
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$request->user_no, $request->path, $etag, $request->raw_post, $ic->type, $author, $request->collection_id );
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if ( !$qry->Exec("PUT") ) rollback_on_error( $caldav_context, $request->user_no, $request->path);
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}
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else {
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$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=?",
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$request->raw_post, $etag, $ic->type, $author, $request->user_no, $request->path );
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if ( !$qry->Exec("PUT") ) rollback_on_error( $caldav_context, $request->user_no, $request->path);
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}
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/**
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* Build the SQL for inserting/updating the calendar_item record
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*/
|
|
$sql = "";
|
|
if ( preg_match(':^(Africa|America|Antarctica|Arctic|Asia|Atlantic|Australia|Brazil|Canada|Chile|Etc|Europe|Indian|Mexico|Mideast|Pacific|US)/[a-z]+$:i', $ic->tz_locn ) ) {
|
|
// We only set the timezone if it looks reasonable enough for us
|
|
$sql = ( $ic->tz_locn == '' ? '' : "SET TIMEZONE TO ".qpg($ic->tz_locn).";" );
|
|
}
|
|
|
|
$dtstart = $ic->Get('DTSTART');
|
|
if ( (!isset($dtstart) || $dtstart == "") && $ic->Get('DUE') != "" ) {
|
|
$dtstart = $ic->Get('DUE');
|
|
}
|
|
|
|
$dtend = $ic->Get('DTEND');
|
|
if ( (!isset($dtend) || "$dtend" == "") && $ic->Get('DURATION') != "" AND $dtstart != "" ) {
|
|
$duration = preg_replace( '#[PT]#', ' ', $ic->Get('DURATION') );
|
|
$dtend = '('.qpg($dtstart).'::timestamp with time zone + '.qpg($duration).'::interval)';
|
|
}
|
|
else {
|
|
dbg_error_log( "PUT", " DTEND: '%s', DTSTART: '%s', DURATION: '%s'", $dtend, $dtstart, $ic->Get('DURATION') );
|
|
$dtend = qpg($dtend);
|
|
}
|
|
|
|
$last_modified = $ic->Get("LAST-MODIFIED");
|
|
if ( !isset($last_modified) || $last_modified == '' ) {
|
|
$last_modified = gmdate( 'Ymd\THis\Z' );
|
|
}
|
|
|
|
$dtstamp = $ic->Get("DTSTAMP");
|
|
if ( !isset($dtstamp) || $dtstamp == '' ) {
|
|
$dtstamp = $last_modified;
|
|
}
|
|
|
|
$class = $ic->Get("class");
|
|
/* Check and see if we should over ride the class. */
|
|
if ( public_events_only($request->user_no, $request->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';
|
|
}
|
|
|
|
|
|
if ( $put_action_type != 'INSERT' ) {
|
|
$sql .= "DELETE FROM calendar_item WHERE user_no=$request->user_no AND dav_name=".qpg($request->path).";";
|
|
}
|
|
$sql .= <<<EOSQL
|
|
INSERT INTO calendar_item (user_no, dav_name, 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 ( ?, ?, ?, ?, ?, ?, $dtend, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?);
|
|
COMMIT;
|
|
EOSQL;
|
|
|
|
$qry = new PgQuery( $sql, $request->user_no, $request->path, $etag, $ic->Get('UID'), $dtstamp,
|
|
$ic->Get('DTSTART'), $ic->Get('SUMMARY'), $ic->Get('LOCATION'),
|
|
$class, $ic->Get('TRANSP'), $ic->Get('DESCRIPTION'), $ic->Get('RRULE'), $ic->Get('TZ_ID'),
|
|
$last_modified, $ic->Get('URL'), $ic->Get('PRIORITY'), $ic->Get('CREATED'),
|
|
$ic->Get('DUE'), $ic->Get('PERCENT-COMPLETE'), $ic->Get('STATUS'), $request->collection_id
|
|
);
|
|
if ( !$qry->Exec("PUT") ) rollback_on_error( $caldav_context, $request->user_no, $request->path);
|
|
dbg_error_log( "PUT", "User: %d, ETag: %s, Path: %s", $author, $etag, $request->path);
|
|
|
|
header(sprintf('ETag: "%s"', (isset($bogus_etag) ? $bogus_etag : $etag) ) );
|
|
|
|
return $put_action_type;
|
|
}
|
|
|