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implemented rfc4791#section-9.9 complient time-range filter

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This commit is contained in:
Ralf Becker 2011-10-06 10:29:01 +00:00
parent d2f4d36355
commit 8f0abbe004
1 changed files with 64 additions and 11 deletions
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75
infolog/inc/class.infolog_groupdav.inc.php
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@ -42,6 +42,7 @@ class infolog_groupdav extends groupdav_handler
'PRIORITY' => 'info_priority',
'LOCATION' => 'info_location',
'COMPLETED' => 'info_datecompleted',
'CREATED' => 'info_created',
);
/**
@ -151,6 +152,9 @@ class infolog_groupdav extends groupdav_handler
// when trying to request not supported components, eg. VTODO on a calendar collection
return true;
}
// enable time-range filter for tests via propfind / autoindex
//$filter[] = $sql = $this->_time_range_filter(array('end' => '20001231T000000Z'));
if ($id) $path = dirname($path).'/'; // caldav_name get's added anyway in the callback
if ($this->debug > 1)
@ -294,17 +298,7 @@ class infolog_groupdav extends groupdav_handler
if ($this->debug) error_log(__METHOD__."($options[path],...) param-filter='{$filter['attrs']['name']}' not (yet) implemented!");
break;
case 'time-range':
// ToDo: CalDAV time-range for VTODO checks DTSTART, DTEND, DUE and allways includes tasks if none given
// see http://tools.ietf.org/html/rfc4791#section-9.9
if ($this->debug > 1) error_log(__FILE__ . __METHOD__."($options[path],...) time-range={$filter['attrs']['start']}-{$filter['attrs']['end']}");
if (!empty($filter['attrs']['start']))
{
$cal_filters[] = 'info_startdate >= ' . (int)$this->vCalendar->_parseDateTime($filter['attrs']['start']);
}
if (!empty($filter['attrs']['end']))
{
$cal_filters[] = 'info_startdate <= ' . (int)$this->vCalendar->_parseDateTime($filter['attrs']['end']);
}
$cal_filters[] = $sql = $this->_time_range_filter($filter['attrs']);
break;
default:
if ($this->debug) error_log(__METHOD__."($options[path],".array2string($options).",...) unknown filter --> ignored");
@ -342,6 +336,65 @@ class infolog_groupdav extends groupdav_handler
return true;
}
/**
* Create SQL filter from time-range filter attributes
*
* CalDAV time-range for VTODO checks DTSTART, DTEND, DUE, CREATED and allways includes tasks if none given
* @see http://tools.ietf.org/html/rfc4791#section-9.9
*
* @param array $attrs values for keys 'start' and/or 'end', at least one is required by CalDAV rfc!
* @return string with sql
*/
private function _time_range_filter(array $attrs)
{
$to_or = $to_and = array();
if (!empty($attrs['start']))
{
$start = (int)$this->vCalendar->_parseDateTime($attrs['start']);
}
if (!empty($attrs['end']))
{
$end = (int)$this->vCalendar->_parseDateTime($attrs['end']);
}
elseif (empty($attrs['start']))
{
error_log(__METHOD__.'('.array2string($attrs).') minimum one of start or end is required!');
return '1'; // to not give sql error, but simply not filter out anything
}
// we dont need to care for DURATION line in rfc4791#section-9.9, as we always put that in DUE/info_enddate
// we have start- and/or enddate
if (isset($start))
{
$to_and[] = "($start < info_enddate OR $start <= info_startdate)";
}
if (isset($end))
{
$to_and[] = "(info_startdate < $end OR info_enddate <= $end)";
}
$to_or[] = '('.implode(' AND ', $to_and).')';
/* either start or enddate is already included in the above, because of OR!
// only a startdate, no enddate
$to_or[] = "NOT info_enddate > 0".($start ? " AND $start <= info_startdate" : '').
($end ? " AND info_startdate < $end" : '');
// only an enddate, no startdate
$to_or[] = "NOT info_startdate > 0".($start ? " AND $start < info_enddate" : '').
($end ? " AND info_enddate <= $end" : '');*/
// no startdate AND no enddate (2. half of rfc4791#section-9.9) --> use created and due dates instead
$to_or[] = 'NOT info_startdate > 0 AND NOT info_enddate > 0 AND ('.
// we have a completed date
"info_datecompleted > 0".(isset($start) ? " AND ($start <= info_datecompleted OR $start <= info_created)" : '').
(isset($end) ? " AND (info_datecompleted <= $end OR info_created <= $end)" : '').' OR '.
// we have no completed date, but always a created date
"NOT info_datecompleted > 0". (isset($end) ? " AND info_created < $end" : '').
')';
$sql = '('.implode(' OR ', $to_or).')';
if ($this->debug > 1) error_log(__FILE__ . __METHOD__.'('.array2string($attrs).") time-range={$filter['attrs']['start']}-{$filter['attrs']['end']} --> $sql");
return $sql;
}
/**
* Handle get request for a task / infolog entry