/**
* Factory method to return an Rfc5545Duration object from the difference
* between two dates.
*
* This is flawed, at present: we should really localise both dates and work
* out the difference in days, then localise the times and work out the difference
* between the clock times. On the other hand we're replacing a quick and dirty
* hack that did it exactly the same way in the past, so we're not making things
* any *worse* and at least we're making it clear that it could be improved...
*
* The problem strikes (as they all do) across DST boundaries.
*
* @todo Improve this to calculate the days difference and then the clock time diff
* and work from there.
*
* @param RepeatRuleDateTime $d1
* @param RepeatRuleDateTime $d2
* @return Rfc5545Duration
*/
static function fromTwoDates($d1, $d2)
{
$diff = $d2->epoch() - $d1->epoch();
return new Rfc5545Duration($diff);
}
/**
* 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 $caldav_context Whether we are responding via CalDAV or interactively
*
* Any VEVENTs with the same UID will be concatenated together
*/
function import_calendar_collection($ics_content, $user_no, $path, $caldav_context, $appending = false)
{
global $c, $session, $tz_regex;
$calendar = new vComponent($ics_content);
$timezones = $calendar->GetComponents('VTIMEZONE', true);
$components = $calendar->GetComponents('VTIMEZONE', false);
// Add a parameter to calendars on import so it will only load events 'after' @author karora
// date, or an RFC5545 duration format offset from the current date.
$after = null;
if (isset($_GET['after'])) {
$after = $_GET['after'];
if (strtoupper(substr($after, 0, 1)) == 'P' || strtoupper(substr($after, 0, 1)) == '-P') {
$duration = new Rfc5545Duration($after);
$duration = $duration->asSeconds();
$after = time() - abs($duration);
} else {
$after = new RepeatRuleDateTime($after);
$after = $after->epoch();
}
}
$displayname = $calendar->GetPValue('X-WR-CALNAME');
if (!$appending && isset($displayname)) {
$sql = 'UPDATE collection SET dav_displayname = :displayname WHERE dav_name = :dav_name';
$qry = new AwlQuery($sql, array(':displayname' => $displayname, ':dav_name' => $path));
if (!$qry->Exec('PUT', __LINE__, __FILE__)) {
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 vComponent */
$resources = array();
foreach ($components as $k => $comp) {
$uid = $comp->GetPValue('UID');
if ($uid == null || $uid == '') {
$uid = uuid();
$comp->AddProperty('UID', $uid);
dbg_error_log('LOG WARN', ' PUT: New collection resource does not have a UID - we assign one!');
}
if (!isset($resources[$uid])) {
$resources[$uid] = array();
}
$resources[$uid][] = $comp;
/** Ensure we have the timezone component for this in our array as well */
$tzid = GetTZID($comp);
if (!empty($tzid) && !isset($resources[$uid][$tzid]) && isset($tz_ids[$tzid])) {
$resources[$uid][$tzid] = $timezones[$tz_ids[$tzid]];
}
}
$sql = 'SELECT * FROM collection WHERE dav_name = :dav_name';
$qry = new AwlQuery($sql, array(':dav_name' => $path));
if (!$qry->Exec('PUT', __LINE__, __FILE__)) {
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();
$collection_id = $collection->collection_id;
// Fetch the current collection data
$qry->QDo('SELECT dav_name, caldav_data FROM caldav_data WHERE collection_id=:collection_id', array(':collection_id' => $collection_id));
$current_data = array();
while ($row = $qry->Fetch()) {
$current_data[$row->dav_name] = $row->caldav_data;
}
if (!(isset($c->skip_bad_event_on_import) && $c->skip_bad_event_on_import)) {
$qry->Begin();
}
$base_params = array(':collection_id' => $collection_id);
$dav_data_insert = <<<EOSQL
INSERT INTO caldav_data ( user_no, dav_name, dav_etag, caldav_data, caldav_type, logged_user, created, modified, collection_id )
VALUES( :user_no, :dav_name, :etag, :dav_data, :caldav_type, :session_user, current_timestamp, current_timestamp, :collection_id )
EOSQL;
$dav_data_update = <<<EOSQL
UPDATE caldav_data SET user_no=:user_no, caldav_data=:dav_data, dav_etag=:etag, caldav_type=:caldav_type, logged_user=:session_user,
modified=current_timestamp WHERE collection_id=:collection_id AND dav_name=:dav_name
EOSQL;
$calitem_insert = <<<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, :dav_name, currval('dav_id_seq'), :etag, :uid, :dtstamp, :dtstart, ##dtend##, :summary, :location, :class, :transp,
:description, :rrule, :tzid, :modified, :url, :priority, :created, :due, :percent_complete, :status, :collection_id)
EOSQL;
$calitem_update = <<<EOSQL
UPDATE calendar_item SET user_no=:user_no, dav_etag=:etag, uid=:uid, dtstamp=:dtstamp,
dtstart=:dtstart, dtend=##dtend##, summary=:summary, location=:location,
class=:class, transp=:transp, description=:description, rrule=:rrule,
tz_id=:tzid, last_modified=:modified, url=:url, priority=:priority,
due=:due, percent_complete=:percent_complete, status=:status
WHERE collection_id=:collection_id AND dav_name=:dav_name
EOSQL;
$last_olson = '';
if (count($resources) > 0) {
$qry->QDo('SELECT new_sync_token(0,' . $collection_id . ')');
}
foreach ($resources as $uid => $resource) {
/** Construct the VCALENDAR data */
$vcal = new vCalendar();
$vcal->SetComponents($resource);
$icalendar = $vcal->Render();
$dav_name = sprintf('%s%s.ics', $path, preg_replace('{[&?\\/@%+:]}', '', $uid));
/** Do we need to do anything? */
$inserting = true;
if (isset($current_data[$dav_name])) {
if ($icalendar == $current_data[$dav_name]) {
unset($current_data[$dav_name]);
continue;
}
$sync_change = 200;
unset($current_data[$dav_name]);
$inserting = false;
} else {
$sync_change = 201;
}
if (isset($c->skip_bad_event_on_import) && $c->skip_bad_event_on_import) {
$qry->Begin();
}
/** As ever, we mostly deal with the first resource component */
$first = $resource[0];
$dav_data_params = $base_params;
$dav_data_params[':user_no'] = $user_no;
// We don't allow any of &?\/@%+: in the UID to appear in the path, but anything else is fair game.
$dav_data_params[':dav_name'] = $dav_name;
$dav_data_params[':etag'] = md5($icalendar);
$calitem_params = $dav_data_params;
$dav_data_params[':dav_data'] = $icalendar;
$dav_data_params[':caldav_type'] = $first->GetType();
$dav_data_params[':session_user'] = $session->user_no;
$dtstart = $first->GetPValue('DTSTART');
$calitem_params[':dtstart'] = $dtstart;
if ((!isset($dtstart) || $dtstart == '') && $first->GetPValue('DUE') != '') {
$dtstart = $first->GetPValue('DUE');
if (isset($after)) {
$dtstart_date = new RepeatRuleDateTime($first->GetProperty('DUE'));
}
} else {
if (isset($after)) {
$dtstart_date = new RepeatRuleDateTime($first->GetProperty('DTSTART'));
}
}
$calitem_params[':rrule'] = $first->GetPValue('RRULE');
// Skip it if it's after our start date for this import.
if (isset($after) && empty($calitem_params[':rrule']) && $dtstart_date->epoch() < $after) {
continue;
}
// Do we actually need to do anything?
$inserting = true;
if (isset($current_data[$dav_name])) {
if ($icalendar == $current_data[$dav_name]) {
if ($after == null) {
unset($current_data[$dav_name]);
continue;
}
}
$sync_change = 200;
unset($current_data[$dav_name]);
$inserting = false;
} else {
$sync_change = 201;
}
// Write to the caldav_data table
if (!$qry->QDo($inserting ? $dav_data_insert : $dav_data_update, $dav_data_params)) {
rollback_on_error($caldav_context, $user_no, $path);
}
// Get the dav_id for this row
$qry->QDo('SELECT dav_id FROM caldav_data WHERE dav_name = :dav_name ', array(':dav_name' => $dav_data_params[':dav_name']));
if ($qry->rows() == 1 && ($row = $qry->Fetch())) {
$dav_id = $row->dav_id;
}
$dtend = $first->GetPValue('DTEND');
if (isset($dtend) && $dtend != '') {
dbg_error_log('PUT', ' DTEND: "%s", DTSTART: "%s", DURATION: "%s"', $dtend, $dtstart, $first->GetPValue('DURATION'));
$calitem_params[':dtend'] = $dtend;
$dtend = ':dtend';
} else {
$dtend = 'NULL';
if ($first->GetPValue('DURATION') != '' and $dtstart != '') {
$duration = trim(preg_replace('#[PT]#', ' ', $first->GetPValue('DURATION')));
if ($duration == '') {
$duration = '0 seconds';
}
$dtend = '(:dtstart::timestamp with time zone + :duration::interval)';
$calitem_params[':duration'] = $duration;
} elseif ($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.
*
*/
$dtstart_prop = $first->GetProperty('DTSTART');
if (empty($dtstart_prop)) {
dbg_error_log('PUT', 'Invalid VEVENT without DTSTART, UID="%s" in collection %d', $uid, $collection_id);
continue;
}
$value_type = $dtstart_prop->GetParameterValue('VALUE');
dbg_error_log('PUT', 'DTSTART without DTEND. DTSTART value type is %s', $value_type);
if (isset($value_type) && $value_type == 'DATE') {
$dtend = '(:dtstart::timestamp with time zone::date + \'1 day\'::interval)';
} else {
$dtend = ':dtstart';
}
}
}
$last_modified = $first->GetPValue('LAST-MODIFIED');
if (!isset($last_modified) || $last_modified == '') {
$last_modified = gmdate('Ymd\\THis\\Z');
}
$calitem_params[':modified'] = $last_modified;
$dtstamp = $first->GetPValue('DTSTAMP');
if (empty($dtstamp)) {
$dtstamp = $last_modified;
}
$calitem_params[':dtstamp'] = $dtstamp;
/** 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';
}
$calitem_params[':class'] = $class;
/** Calculate what timezone to set, first, if possible */
$tzid = GetTZID($first);
if (!empty($tzid) && !empty($resource[$tzid])) {
$tz = $resource[$tzid];
$olson = $vcal->GetOlsonName($tz);
dbg_error_log('PUT', ' Using TZID[%s] and location of [%s]', $tzid, isset($olson) ? $olson : '');
if (!empty($olson) && $olson != $last_olson && preg_match($tz_regex, $olson)) {
dbg_error_log('PUT', ' Setting timezone to %s', $olson);
$qry->QDo('SET TIMEZONE TO \'' . $olson . "'");
$last_olson = $olson;
}
$params = array(':tzid' => $tzid);
$qry = new AwlQuery('SELECT 1 FROM timezones WHERE tzid = :tzid', $params);
if ($qry->Exec('PUT', __LINE__, __FILE__) && $qry->rows() == 0) {
$params[':olson_name'] = $olson;
$params[':vtimezone'] = isset($tz) ? $tz->Render() : null;
$params[':last_modified'] = isset($tz) ? $tz->GetPValue('LAST-MODIFIED') : null;
if (empty($params[':last_modified'])) {
$params[':last_modified'] = gmdate('Ymd\\THis\\Z');
}
$qry->QDo('INSERT INTO timezones (tzid, olson_name, active, vtimezone, last_modified) VALUES(:tzid,:olson_name,false,:vtimezone,:last_modified)', $params);
}
} else {
$tz = $olson = $tzid = null;
}
$sql = str_replace('##dtend##', $dtend, $inserting ? $calitem_insert : $calitem_update);
$calitem_params[':tzid'] = $tzid;
$calitem_params[':uid'] = $first->GetPValue('UID');
$calitem_params[':summary'] = $first->GetPValue('SUMMARY');
$calitem_params[':location'] = $first->GetPValue('LOCATION');
$calitem_params[':transp'] = $first->GetPValue('TRANSP');
$calitem_params[':description'] = $first->GetPValue('DESCRIPTION');
$calitem_params[':url'] = $first->GetPValue('URL');
$calitem_params[':priority'] = $first->GetPValue('PRIORITY');
$calitem_params[':due'] = $first->GetPValue('DUE');
$calitem_params[':percent_complete'] = $first->GetPValue('PERCENT-COMPLETE');
$calitem_params[':status'] = $first->GetPValue('STATUS');
if ($inserting) {
$created = $first->GetPValue('CREATED');
if ($created == '00001231T000000Z') {
$created = '20001231T000000Z';
}
$calitem_params[':created'] = $created;
}
// Write the calendar_item row for this entry
if (!$qry->QDo($sql, $calitem_params)) {
rollback_on_error($caldav_context, $user_no, $path);
}
write_alarms($dav_id, $first);
write_attendees($dav_id, $vcal);
$qry->QDo("SELECT write_sync_change( {$collection_id}, {$sync_change}, :dav_name)", array(':dav_name' => $dav_name));
do_scheduling_requests($vcal, true);
if (isset($c->skip_bad_event_on_import) && $c->skip_bad_event_on_import) {
$qry->Commit();
}
}
if (!$appending && count($current_data) > 0) {
$params = array(':collection_id' => $collection_id);
if (isset($c->skip_bad_event_on_import) && $c->skip_bad_event_on_import) {
$qry->Begin();
}
foreach ($current_data as $dav_name => $data) {
$params[':dav_name'] = $dav_name;
$qry->QDo('DELETE FROM caldav_data WHERE collection_id = :collection_id AND dav_name = :dav_name', $params);
$qry->QDo('SELECT write_sync_change(:collection_id, 404, :dav_name)', $params);
}
if (isset($c->skip_bad_event_on_import) && $c->skip_bad_event_on_import) {
$qry->Commit();
}
}
if (!(isset($c->skip_bad_event_on_import) && $c->skip_bad_event_on_import)) {
if (!$qry->Commit()) {
rollback_on_error($caldav_context, $user_no, $path);
}
}
}
function caldav_get_feed($request, $collection)
{
global $c, $session;
dbg_error_log("feed", "GET method handler");
$collection->NeedPrivilege(array('DAV::read'));
if (!$collection->Exists()) {
$request->DoResponse(404, translate("Resource Not Found."));
}
if (!$collection->IsCollection() || !$collection->IsCalendar() && !(isset($c->get_includes_subcollections) && $c->get_includes_subcollections)) {
$request->DoResponse(405, translate("Feeds are only supported for calendars at present."));
}
// Try and pull the answer out of a hat
$cache = getCacheInstance();
$cache_ns = 'collection-' . $collection->dav_name();
$cache_key = 'feed' . $session->user_no;
$response = $cache->get($cache_ns, $cache_key);
if ($response !== false) {
return $response;
}
$principal = $collection->GetProperty('principal');
/**
* 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.
*/
$sql = 'SELECT caldav_data, caldav_type, caldav_data.user_no, caldav_data.dav_name,';
$sql .= ' caldav_data.modified, caldav_data.created, ';
$sql .= ' summary, dtstart, dtend, calendar_item.description ';
$sql .= ' FROM collection INNER JOIN caldav_data USING(collection_id) INNER JOIN calendar_item USING ( dav_id ) WHERE ';
if (isset($c->get_includes_subcollections) && $c->get_includes_subcollections) {
$sql .= ' (collection.dav_name ~ :path_match ';
$sql .= ' OR collection.collection_id IN (SELECT bound_source_id FROM dav_binding WHERE dav_binding.dav_name ~ :path_match)) ';
$params = array(':path_match' => '^' . $request->path);
} else {
$sql .= ' caldav_data.collection_id = :collection_id ';
$params = array(':collection_id' => $collection->resource_id());
}
$sql .= ' ORDER BY caldav_data.created DESC';
$sql .= ' LIMIT ' . (isset($c->feed_item_limit) ? $c->feed_item_limit : 15);
$qry = new AwlQuery($sql, $params);
if (!$qry->Exec("GET", __LINE__, __FILE__)) {
$request->DoResponse(500, translate("Database Error"));
}
/**
* Here we are constructing the feed response for this collection, including
* the timezones that are referred to by the events we have selected.
* Library used: http://framework.zend.com/manual/en/zend.feed.writer.html
*/
require_once 'AtomFeed.php';
$feed = new AtomFeed();
$feed->setTitle('DAViCal Atom Feed: ' . $collection->GetProperty('displayname'));
$url = $c->protocol_server_port . $collection->url();
$url = preg_replace('{/$}', '.ics', $url);
$feed->setLink($url);
$feed->setFeedLink($c->protocol_server_port_script . $request->path, 'atom');
$feed->addAuthor(array('name' => $principal->GetProperty('displayname'), 'email' => $principal->GetProperty('email'), 'uri' => $c->protocol_server_port . $principal->url()));
$feed_description = $collection->GetProperty('description');
if (isset($feed_description) && $feed_description != '') {
$feed->setDescription($feed_description);
}
require_once 'RRule-v2.php';
$need_zones = array();
$timezones = array();
while ($event = $qry->Fetch()) {
if ($event->caldav_type != 'VEVENT' && $event->caldav_type != 'VTODO' && $event->caldav_type != 'VJOURNAL') {
dbg_error_log('feed', 'Skipping peculiar "%s" component in VCALENDAR', $event->caldav_type);
continue;
}
$is_todo = $event->caldav_type == 'VTODO';
$ical = new vComponent($event->caldav_data);
$event_data = $ical->GetComponents('VTIMEZONE', false);
$item = $feed->createEntry();
$item->setId($c->protocol_server_port_script . ConstructURL($event->dav_name));
$dt_created = new RepeatRuleDateTime($event->created);
$item->setDateCreated($dt_created->epoch());
$dt_modified = new RepeatRuleDateTime($event->modified);
$item->setDateModified($dt_modified->epoch());
$summary = $event->summary;
$p_title = $summary != '' ? $summary : translate('No summary');
if ($is_todo) {
$p_title = "TODO: " . $p_title;
}
$item->setTitle($p_title);
$content = "";
$dt_start = new RepeatRuleDateTime($event->dtstart);
if ($dt_start != null) {
$p_time = '<strong>' . translate('Time') . ':</strong> ' . strftime(translate('%F %T'), $dt_start->epoch());
$dt_end = new RepeatRuleDateTime($event->dtend);
if ($dt_end != null) {
$p_time .= ' - ' . ($dt_end->AsDate() == $dt_start->AsDate() ? strftime(translate('%T'), $dt_end->epoch()) : strftime(translate('%F %T'), $dt_end->epoch()));
}
$content .= $p_time;
}
$p_location = $event_data[0]->GetProperty('LOCATION');
if ($p_location != null) {
$content .= '<br />' . '<strong>' . translate('Location') . '</strong>: ' . hyperlink($p_location->Value());
}
$p_attach = $event_data[0]->GetProperty('ATTACH');
if ($p_attach != null) {
$content .= '<br />' . '<strong>' . translate('Attachment') . '</strong>: ' . hyperlink($p_attach->Value());
}
$p_url = $event_data[0]->GetProperty('URL');
if ($p_url != null) {
$content .= '<br />' . '<strong>' . translate('URL') . '</strong>: ' . hyperlink($p_url->Value());
}
$p_cat = $event_data[0]->GetProperty('CATEGORIES');
if ($p_cat != null) {
$content .= '<br />' . '<strong>' . translate('Categories') . '</strong>: ' . $p_cat->Value();
$categories = explode(',', $p_cat->Value());
foreach ($categories as $category) {
$item->addCategory(array('term' => trim($category)));
}
}
$p_description = $event->description;
if ($p_description != '') {
$content .= '<br />' . '<br />' . '<strong>' . translate('Description') . '</strong>:<br />' . nl2br(hyperlink($p_description));
$item->setDescription($p_description);
}
$item->setContent($content);
$feed->addEntry($item);
//break;
}
$last_modified = new RepeatRuleDateTime($collection->GetProperty('modified'));
$feed->setDateModified($last_modified->epoch());
$response = $feed->export('atom');
$cache->set($cache_ns, $cache_key, $response);
return $response;
}
