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egroupware_official/calendar/inc/class.calendar_so.inc.php

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<?php
/**
* eGroupWare - Calendar's storage-object
*
* @link http://www.egroupware.org
* @package calendar
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @author Joerg Lehrke <jlehrke@noc.de>
* @copyright (c) 2005-9 by RalfBecker-At-outdoor-training.de
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @version $Id$
*/
/**
* some necessary defines used by the calendar
*/
if(!extension_loaded('mcal'))
{
define('MCAL_RECUR_NONE',0);
define('MCAL_RECUR_DAILY',1);
define('MCAL_RECUR_WEEKLY',2);
define('MCAL_RECUR_MONTHLY_MDAY',3);
define('MCAL_RECUR_MONTHLY_WDAY',4);
define('MCAL_RECUR_YEARLY',5);
define('MCAL_RECUR_SECONDLY',6);
define('MCAL_RECUR_MINUTELY',7);
define('MCAL_RECUR_HOURLY',8);
define('MCAL_M_SUNDAY',1);
define('MCAL_M_MONDAY',2);
define('MCAL_M_TUESDAY',4);
define('MCAL_M_WEDNESDAY',8);
define('MCAL_M_THURSDAY',16);
define('MCAL_M_FRIDAY',32);
define('MCAL_M_SATURDAY',64);
define('MCAL_M_WEEKDAYS',62);
define('MCAL_M_WEEKEND',65);
define('MCAL_M_ALLDAYS',127);
}
define('REJECTED',0);
define('NO_RESPONSE',1);
define('TENTATIVE',2);
define('ACCEPTED',3);
define('HOUR_s',60*60);
define('DAY_s',24*HOUR_s);
define('WEEK_s',7*DAY_s);
/**
* Class to store all calendar data (storage object)
*
* Tables used by socal:
* - egw_cal: general calendar data: cal_id, title, describtion, locations, ...
* - egw_cal_dates: start- and enddates (multiple entry per cal_id for recuring events!)
* - egw_cal_user: participant info including status (multiple entries per cal_id AND startdate for recuring events)
* - egw_cal_repeats: recur-data: type, optional enddate, etc.
* - egw_cal_extra: custom fields (multiple entries per cal_id possible)
*
* The new UI, BO and SO classes have a strikt definition, in which time-zone they operate:
* UI only operates in user-time, so there have to be no conversation at all !!!
* BO's functions take and return user-time only (!), they convert internaly everything to servertime, because
* SO operates only on server-time
*/
class calendar_so
{
/**
* name of the main calendar table and prefix for all other calendar tables
*/
var $cal_table = 'egw_cal';
var $extra_table,$repeats_table,$user_table,$dates_table,$all_tables;
/**
* reference to global db-object
*
* @var egw_db
*/
var $db;
/**
* instance of the async object
*
* @var asyncservice
*/
var $async;
/**
* SQL to sort by status U, T, A, R
*
*/
const STATUS_SORT = "CASE cal_status WHEN 'U' THEN 1 WHEN 'T' THEN 2 WHEN 'A' THEN 3 WHEN 'R' THEN 4 ELSE 0 END ASC";
/**
* Constructor of the socal class
*/
function __construct()
{
$this->async = $GLOBALS['egw']->asyncservice;
$this->db = $GLOBALS['egw']->db;
$this->all_tables = array($this->cal_table);
foreach(array('extra','repeats','user','dates') as $name)
{
$vname = $name.'_table';
$this->all_tables[] = $this->$vname = $this->cal_table.'_'.$name;
}
}
/**
* reads one or more calendar entries
*
* All times (start, end and modified) are returned as timesstamps in servertime!
*
* @param int|array|string $ids id or array of id's of the entries to read, or string with a single uid
* @param int $recur_date=0 if set read the next recurrance at or after the timestamp, default 0 = read the initital one
* @return array|boolean array with id => data pairs or false if entry not found
*/
function read($ids,$recur_date=0)
{
if (isset($GLOBALS['egw_info']['user']['preferences']['syncml']['minimum_uid_length']))
{
$minimum_uid_length = $GLOBALS['egw_info']['user']['preferences']['syncml']['minimum_uid_length'];
}
else
{
$minimum_uid_length = 8;
}
//echo "<p>socal::read(".print_r($ids,true).",$recur_date)<br />\n".function_backtrace()."<p>\n";
$table_def = $this->db->get_table_definitions('calendar',$this->cal_table);
$group_by_cols = $this->cal_table.'.'.implode(','.$this->cal_table.'.',array_keys($table_def['fd']));
$table_def = $this->db->get_table_definitions('calendar',$this->repeats_table);
$group_by_cols .= ','.$this->repeats_table.'.'.implode(','.$this->repeats_table.'.',array_keys($table_def['fd']));
$where = array();
if (is_array($ids))
{
array_walk($ids,create_function('&$val,$key','$val = (int) $val;'));
$where[] = $this->cal_table.'.cal_id IN ('.implode(',',$ids).')';
}
elseif (is_numeric($ids))
{
$where[] = $this->cal_table.'.cal_id = '.(int) $ids;
}
else
{
// We only what the parents to match
$where['cal_uid'] = $ids;
$where['cal_reference'] = 0;
}
if ((int) $recur_date)
{
$where[] = 'cal_start >= '.(int)$recur_date;
}
$events = array();
foreach($this->db->select($this->cal_table,"$this->repeats_table.*,$this->cal_table.*,MIN(cal_start) AS cal_start,MIN(cal_end) AS cal_end",
$where,__LINE__,__FILE__,false,'GROUP BY '.$group_by_cols,'calendar',0,
",$this->dates_table LEFT JOIN $this->repeats_table ON $this->dates_table.cal_id=$this->repeats_table.cal_id".
" WHERE $this->cal_table.cal_id=$this->dates_table.cal_id") as $row)
{
$row['recur_exception'] = $row['recur_exception'] ? explode(',',$row['recur_exception']) : array();
if (!$row['recur_type']) $row['recur_type'] = MCAL_RECUR_NONE;
$row['alarm'] = array();
$events[$row['cal_id']] = egw_db::strip_array_keys($row,'cal_');
// if a uid was supplied, convert it for the further code to an id
if (!is_array($ids) && !is_numeric($ids)) $ids = $row['cal_id'];
}
if (!$events) return false;
foreach ($events as &$event)
{
if (!isset($event['uid']) || strlen($event['uid']) < $minimum_uid_length)
{
// event (without uid), not strong enough uid => create new uid
$event['uid'] = $GLOBALS['egw']->common->generate_uid('calendar',$event['id']);
$this->db->update($this->cal_table, array('cal_uid' => $event['uid']),
array('cal_id' => $event['id']),__LINE__,__FILE__,'calendar');
}
}
// check if we have a real recurance, if not set $recur_date=0
if (is_array($ids) || $events[(int)$ids]['recur_type'] == MCAL_RECUR_NONE)
{
$recur_date = 0;
}
else // adjust the given recurance to the real time, it can be a date without time(!)
{
if ($recur_date)
{
// also remember recur_date, maybe we need it later, duno now
$recur_date = $events[$ids]['recur_date'] = $events[$ids]['start'];
}
}
// participants, if a recur_date give, we read that recurance, else the one users from the default entry with recur_date=0
foreach($this->db->select($this->user_table,'*',array(
'cal_id' => $ids,
'cal_recur_date' => $recur_date,
),__LINE__,__FILE__,false,'ORDER BY cal_user_type DESC,'.self::STATUS_SORT,'calendar') as $row) // DESC puts users before resources and contacts
{
// combine all participant data in uid and status values
$uid = self::combine_user($row['cal_user_type'],$row['cal_user_id']);
$status = self::combine_status($row['cal_status'],$row['cal_quantity'],$row['cal_role']);
$events[$row['cal_id']]['participants'][$uid] = $status;
$events[$row['cal_id']]['participant_types'][$row['cal_user_type']][$row['cal_user_id']] = $status;
}
// custom fields
foreach($this->db->select($this->extra_table,'*',array('cal_id'=>$ids),__LINE__,__FILE__,false,'','calendar') as $row)
{
$events[$row['cal_id']]['#'.$row['cal_extra_name']] = $row['cal_extra_value'];
}
// alarms, atm. we read all alarms in the system, as this can be done in a single query
foreach((array)$this->async->read('cal'.(is_array($ids) ? '' : ':'.(int)$ids).':%') as $id => $job)
{
list(,$cal_id) = explode(':',$id);
if (!isset($events[$cal_id])) continue; // not needed
$alarm = $job['data']; // text, enabled
$alarm['id'] = $id;
$alarm['time'] = $job['next'];
$events[$cal_id]['alarm'][$id] = $alarm;
}
//echo "<p>socal::read(".print_r($ids,true).")=<pre>".print_r($events,true)."</pre>\n";
return $events;
}
/**
* generate SQL to filter after a given category (evtl. incl. subcategories)
*
* @param array|int $cat_id cat-id or array of cat-ids, or !$cat_id for none
* @return string SQL to include in the query
*/
function cat_filter($cat_id)
{
$sql = '';
if ($cat_id)
{
if (!is_array($cat_id) && !@$GLOBALS['egw_info']['user']['preferences']['common']['cats_no_subs'])
{
$cats = $GLOBALS['egw']->categories->return_all_children($cat_id);
}
else
{
$cats = is_array($cat_id) ? $cat_id : array($cat_id);
}
array_walk($cats,create_function('&$val,$key','$val = (int) $val;'));
$sql = '(cal_category'.(count($cats) > 1 ? " IN ('".implode("','",$cats)."')" : '='.$this->db->quote((int)$cat_id));
foreach($cats as $cat)
{
$sql .= ' OR '.$this->db->concat("','",'cal_category',"','").' LIKE '.$this->db->quote('%,'.$cat.',%');
}
$sql .= ') ';
}
return $sql;
}
/**
* Searches / lists calendar entries, including repeating ones
*
* @param int $start startdate of the search/list (servertime)
* @param int $end enddate of the search/list (servertime)
* @param int|array $users user-id or array of user-id's, !$users means all entries regardless of users
* @param int $cat_id=0 mixed category-id or array of cat-id's, default 0 = all
* Please note: only a single cat-id, will include all sub-cats (if the common-pref 'cats_no_subs' is False)
* @param string $filter='' string filter-name, atm. all or hideprivate
* @param string $query='' pattern so search for, if unset or empty all matching entries are returned (no search)
* Please Note: a search never returns repeating events more then once AND does not honor start+end date !!!
* @param int|boolean $offset=False offset for a limited query or False (default)
* @param int $num_rows=0 number of rows to return if offset set, default 0 = use default in user prefs
* @param string $order='cal_start' column-names plus optional DESC|ASC separted by comma
* @param boolean $show_rejected=true should the search return rejected invitations
* @param string|array $_cols=null what to select, default "$this->repeats_table.*,$this->cal_table.*,cal_start,cal_end,cal_recur_date"
* if specified an iterator for the rows is returned
* @param string $append='' SQL to append to the query before $order, eg. for a GROUP BY clause
* @return array of cal_ids, or false if error in the parameters
*
* ToDo: search custom-fields too
*/
function &search($start,$end,$users,$cat_id=0,$filter='',$query='',$offset=False,$num_rows=0,$order='cal_start',$show_rejected=true,$_cols=null,$append='')
{
//echo '<p>'.__METHOD__.'('.($start ? date('Y-m-d H:i',$start) : '').','.($end ? date('Y-m-d H:i',$end) : '').','.array2string($users).','.array2string($cat_id).",'$filter',".array2string($query).",$offset,$num_rows,$order,$show_rejected,".array2string($_cols).",$append)</p>\n";
$cols = !is_null($_cols) ? $_cols : "$this->repeats_table.*,$this->cal_table.*,cal_start,cal_end,cal_recur_date";
$where = array();
if (is_array($query))
{
$where = $query;
}
elseif ($query)
{
foreach(array('cal_title','cal_description','cal_location') as $col)
{
$to_or[] = $col . ' LIKE ' . $this->db->quote('%'.$query.'%');
}
$where[] = '('.implode(' OR ',$to_or).')';
}
if ($users)
{
$users_by_type = array();
foreach((array)$users as $user)
{
if (is_numeric($user))
{
$users_by_type['u'][] = (int) $user;
}
elseif (is_numeric(substr($user,1)))
{
$users_by_type[$user[0]][] = (int) substr($user,1);
}
}
$to_or = array();
$table_def = $this->db->get_table_definitions('calendar',$this->user_table);
foreach($users_by_type as $type => $ids)
{
$to_or[] = $this->db->expression($table_def,array(
'cal_user_type' => $type,
'cal_user_id' => $ids,
));
}
$where[] = '('.implode(' OR ',$to_or).')';
if (!$show_rejected) $where[] = "cal_status != 'R'";
}
if ($cat_id)
{
$where[] = $this->cat_filter($cat_id);
}
if ($start) $where[] = (int)$start.' < cal_end';
if ($end) $where[] = 'cal_start < '.(int)$end;
if (!preg_match('/^[a-z_ ,]+$/i',$order)) $order = 'cal_start'; // gard against SQL injunktion
if ($this->db->capabilities['distinct_on_text'] && $this->db->capabilities['union'])
{
// changed the original OR in the query into a union, to speed up the query execution under MySQL 5
$select = array(
'table' => $this->cal_table,
'join' => "JOIN $this->dates_table ON $this->cal_table.cal_id=$this->dates_table.cal_id JOIN $this->user_table ON $this->cal_table.cal_id=$this->user_table.cal_id LEFT JOIN $this->repeats_table ON $this->cal_table.cal_id=$this->repeats_table.cal_id",
'cols' => $cols,
'where' => $where,
'app' => 'calendar',
'append'=> $append,
);
$selects = array($select,$select);
$selects[0]['where'][] = 'recur_type IS NULL AND cal_recur_date=0';
$selects[1]['where'][] = 'cal_recur_date=cal_start';
if (is_numeric($offset)) // get the total too
{
// we only select cal_table.cal_id (and not cal_table.*) to be able to use DISTINCT (eg. MsSQL does not allow it for text-columns)
$selects[0]['cols'] = $selects[1]['cols'] = "DISTINCT $this->repeats_table.*,$this->cal_table.cal_id,cal_start,cal_end,cal_recur_date";
$this->total = $this->db->union($selects,__LINE__,__FILE__)->NumRows();
$selects[0]['cols'] = $selects[1]['cols'] = $select['cols']; // restore the original cols
}
// error_log("calendar_so_search:\n" . print_r($selects, true));
$rs = $this->db->union($selects,__LINE__,__FILE__,$order,$offset,$num_rows);
}
else // MsSQL oder MySQL 3.23
{
$where[] = '(recur_type IS NULL AND cal_recur_date=0 OR cal_recur_date=cal_start)';
//_debug_array($where);
if (is_numeric($offset)) // get the total too
{
// we only select cal_table.cal_id (and not cal_table.*) to be able to use DISTINCT (eg. MsSQL does not allow it for text-columns)
$this->total = $this->db->select($this->cal_table,"DISTINCT $this->repeats_table.*,$this->cal_table.cal_id,cal_start,cal_end,cal_recur_date",
$where,__LINE__,__FILE__,false,'','calendar',0,
"JOIN $this->dates_table ON $this->cal_table.cal_id=$this->dates_table.cal_id JOIN $this->user_table ON $this->cal_table.cal_id=$this->user_table.cal_id LEFT JOIN $this->repeats_table ON $this->cal_table.cal_id=$this->repeats_table.cal_id")->NumRows();
}
$rs = $this->db->select($this->cal_table,($this->db->capabilities['distinct_on_text'] ? 'DISTINCT ' : '').$cols,
$where,__LINE__,__FILE__,$offset,$append.' ORDER BY '.$order,'calendar',$num_rows,
"JOIN $this->dates_table ON $this->cal_table.cal_id=$this->dates_table.cal_id JOIN $this->user_table ON $this->cal_table.cal_id=$this->user_table.cal_id LEFT JOIN $this->repeats_table ON $this->cal_table.cal_id=$this->repeats_table.cal_id");
}
if (!is_null($_cols))
{
return $rs; // if colums are specified we return the recordset / iterator
}
$events = $ids = $recur_dates = $recur_ids = array();
foreach($rs as $row)
{
$ids[] = $id = $row['cal_id'];
if ($row['cal_recur_date'])
{
$id .= '-'.$row['cal_recur_date'];
$recur_dates[] = $row['cal_recur_date'];
}
$row['alarm'] = array();
$row['recur_exception'] = $row['recur_exception'] ? explode(',',$row['recur_exception']) : array();
$events[$id] = egw_db::strip_array_keys($row,'cal_');
}
if (count($events))
{
// now ready all users with the given cal_id AND (cal_recur_date=0 or the fitting recur-date)
// This will always read the first entry of each recuring event too, we eliminate it later
$recur_dates[] = 0;
$utcal_id_view = " (SELECT * FROM ".$this->user_table." WHERE cal_id IN (".implode(',',array_unique($ids)).")) utcalid ";
//$utrecurdate_view = " (select * from ".$this->user_table." where cal_recur_date in (".implode(',',array_unique($recur_dates)).")) utrecurdates ";
foreach($this->db->select($utcal_id_view,'*',array(
//'cal_id' => array_unique($ids),
'cal_recur_date' => $recur_dates,
),__LINE__,__FILE__,false,'ORDER BY cal_id,cal_user_type DESC,'.self::STATUS_SORT,'calendar',$num_rows=0,$join='',
$this->db->get_table_definitions('calendar',$this->user_table)) as $row) // DESC puts users before resources and contacts
{
$id = $row['cal_id'];
if ($row['cal_recur_date']) $id .= '-'.$row['cal_recur_date'];
if (!isset($events[$id])) continue; // not needed first entry of recuring event
// combine all participant data in uid and status values
$events[$id]['participants'][self::combine_user($row['cal_user_type'],$row['cal_user_id'])] =
self::combine_status($row['cal_status'],$row['cal_quantity'],$row['cal_role']);
}
/* custom fields are not shown in the regular views, so we can ignore them here for the moment
foreach($this->db->select($this->extra_table,'*',array('cal_id'=>$ids),__LINE__,__FILE__,false,'','calendar') as $row)
{
$set_ids = array($row['cal_id']);
if (isset($recur_ids[$row['cal_id']])) $set_ids += $recur_ids[$row['cal_id']];
foreach($set_ids as $id)
{
if (isset($events[$cal_id]))
{
$events[$id]['#'.$row['cal_extra_name']] = $row['cal_extra_value'];
}
}
}
*/
// alarms, atm. we read all alarms in the system, as this can be done in a single query
foreach((array)$this->async->read('cal'.(is_array($ids) ? '' : ':'.(int)$ids).':%') as $id => $job)
{
list(,$cal_id) = explode(':',$id);
$alarm = $job['data']; // text, enabled
$alarm['id'] = $id;
$alarm['time'] = $job['next'];
$event_start = $alarm['time'] + $alarm['offset'];
if (isset($events[$cal_id])) // none recuring event
{
$events[$cal_id]['alarm'][$id] = $alarm;
}
elseif (isset($events[$cal_id.'-'.$event_start])) // recuring event
{
$events[$cal_id.'-'.$event_start]['alarm'][$id] = $alarm;
}
}
}
//echo "<p>socal::search\n"; _debug_array($events);
return $events;
}
/**
* Checks for conflicts
*/
/* folowing SQL checks for conflicts completly on DB level
SELECT cal_user_type, cal_user_id, SUM( cal_quantity )
FROM egw_cal, egw_cal_dates, egw_cal_user
LEFT JOIN egw_cal_repeats ON egw_cal.cal_id = egw_cal_repeats.cal_id
WHERE egw_cal.cal_id = egw_cal_dates.cal_id
AND egw_cal.cal_id = egw_cal_user.cal_id
AND (
recur_type IS NULL
AND cal_recur_date =0
OR cal_recur_date = cal_start
)
AND (
(
cal_user_type = 'u' # user of the checked event
AND cal_user_id
IN ( 7, 5 )
)
AND 1118822400 < cal_end # start- and end-time of the checked event
AND cal_start <1118833200
)
AND egw_cal.cal_id !=26 # id of the checked event
AND cal_non_blocking !=1
AND cal_status != 'R'
GROUP BY cal_user_type, cal_user_id
ORDER BY cal_user_type, cal_usre_id
*/
/**
* Saves or creates an event
*
* We always set cal_modified and cal_modifier and for new events cal_uid.
* All other column are only written if they are set in the $event parameter!
*
* @param array $event
* @param boolean &$set_recurrences on return: true if the recurrences need to be written, false otherwise
* @param int &$set_recurrences_start=0 on return: time from which on the recurrences should be rebuilt, default 0=all
* @param int $change_since=0 time from which on the repetitions should be changed, default 0=all
* @param int &$etag etag=null etag to check or null, on return new etag
* @return boolean|int false on error, 0 if etag does not match, cal_id otherwise
*/
function save($event,&$set_recurrences,&$set_recurrences_start=0,$change_since=0,&$etag=null)
{
if (isset($GLOBALS['egw_info']['user']['preferences']['syncml']['minimum_uid_length']))
{
$minimum_uid_length = $GLOBALS['egw_info']['user']['preferences']['syncml']['minimum_uid_length'];
}
else
{
$minimum_uid_length = 8;
}
//echo '<p>'.__METHOD__.'('.array2string($event).",$change_since) event="; _debug_array($event);
//error_log(__METHOD__.'('.array2string($event).",$set_recurrences,$change_since,$etag)");
$cal_id = (int) $event['id'];
unset($event['id']);
$set_recurrences = !$cal_id && $event['recur_type'] != MCAL_RECUR_NONE;
// add colum prefix 'cal_' if there's not already a 'recur_' prefix
foreach($event as $col => $val)
{
if ($col[0] != '#' && substr($col,0,6) != 'recur_' && $col != 'alarm')
{
$event['cal_'.$col] = $val;
unset($event[$col]);
}
}
if (is_array($event['cal_category'])) $event['cal_category'] = implode(',',$event['cal_category']);
if ($cal_id)
{
$where = array('cal_id' => $cal_id);
if (!is_null($etag)) $where['cal_etag'] = $etag;
unset($event['cal_etag']);
$event[] = 'cal_etag=cal_etag+1'; // always update the etag, even if none given to check
$this->db->update($this->cal_table,$event,$where,__LINE__,__FILE__,'calendar');
if (!is_null($etag) && $this->db->affected_rows() < 1)
{
return 0; // wrong etag, someone else updated the entry
}
if (!is_null($etag)) ++$etag;
}
else
{
// new event
if (!$event['cal_owner']) $event['cal_owner'] = $GLOBALS['egw_info']['user']['account_id'];
if (!$event['cal_id'] && !isset($event['cal_uid'])) $event['cal_uid'] = ''; // uid is NOT NULL!
$this->db->insert($this->cal_table,$event,false,__LINE__,__FILE__,'calendar');
if (!($cal_id = $this->db->get_last_insert_id($this->cal_table,'cal_id')))
{
return false;
}
$etag = 0;
}
if (!isset($event['cal_uid']) || strlen($event['cal_uid']) < $minimum_uid_length)
{
// event (without uid), not strong enough uid
$event['cal_uid'] = $GLOBALS['egw']->common->generate_uid('calendar',$cal_id);
$this->db->update($this->cal_table, array('cal_uid' => $event['cal_uid']),
array('cal_id' => $event['cal_id']),__LINE__,__FILE__,'calendar');
}
// write information about recuring event, if recur_type is present in the array
if (isset($event['recur_type']))
{
// fetch information about the currently saved (old) event
$old_min = (int) $this->db->select($this->dates_table,'MIN(cal_start)',array('cal_id'=>$cal_id),__LINE__,__FILE__,false,'','calendar')->fetchColumn();
$old_duration = (int) $this->db->select($this->dates_table,'MIN(cal_end)',array('cal_id'=>$cal_id),__LINE__,__FILE__,false,'','calendar')->fetchColumn() - $old_min;
$old_repeats = $this->db->select($this->repeats_table,'*',array('cal_id' => $cal_id),__LINE__,__FILE__,false,'','calendar')->fetch();
$old_exceptions = $old_repeats['recur_exception'] ? explode(',',$old_repeats['recur_exception']) : array();
$event['recur_exception'] = is_array($event['recur_exception']) ? $event['recur_exception'] : array();
// re-check: did so much recurrence data change that we have to rebuild it from scratch?
if (!$set_recurrences)
{
$set_recurrences = (isset($event['cal_start']) && (int)$old_min != (int) $event['cal_start']) ||
$event['recur_type'] != $old_repeats['recur_type'] || $event['recur_data'] != $old_repeats['recur_data'] ||
(int)$event['recur_interval'] != (int)$old_repeats['recur_interval'];
}
if ($set_recurrences)
{
// too much recurrence data has changed, we have to do a rebuild from scratch
// delete all, but the lowest dates record
$this->db->delete($this->dates_table,array(
'cal_id' => $cal_id,
'cal_start > '.(int)$old_min,
),__LINE__,__FILE__,'calendar');
// delete all user-records, with recur-date != 0
$this->db->delete($this->user_table,array(
'cal_id' => $cal_id,
'cal_recur_date != 0',
),__LINE__,__FILE__,'calendar');
}
else
{
// we adjust some possibly changed recurrences manually
// deleted exceptions: re-insert recurrences into the user and dates table
if(count($deleted_exceptions = array_diff($old_exceptions,$event['recur_exception'])))
{
foreach($deleted_exceptions as $id => $deleted_exception)
{
// rebuild participants for the re-inserted recurrence
$participants = array();
$participants_only = $this->get_participants($cal_id); // participants without states
foreach($participants_only as $id => $participant_only)
{
$states = $this->get_recurrences($cal_id, $participant_only['uid']);
$participants[$participant_only['uid']] = $states[0]; // insert main status as default
}
$this->recurrence($cal_id, $deleted_exception, $deleted_exception + $old_duration, $participants);
}
}
// check if recurrence enddate was adjusted
if(isset($event['recur_enddate']))
{
// recurrences need to be truncated
if((int)$event['recur_enddate'] > 0 &&
((int)$old_repeats['recur_enddate'] == 0 || (int)$old_repeats['recur_enddate'] > (int)$event['recur_enddate'])
)
{
$this->db->delete($this->user_table,array('cal_id' => $cal_id,'cal_recur_date > '.($event['recur_enddate'] + 1*DAY_s)),__LINE__,__FILE__,'calendar');
$this->db->delete($this->dates_table,array('cal_id' => $cal_id,'cal_start > '.($event['recur_enddate'] + 1*DAY_s)),__LINE__,__FILE__,'calendar');
}
// recurrences need to be expanded
if(((int)$event['recur_enddate'] == 0 && (int)$old_repeats['recur_enddate'] > 0)
|| ((int)$event['recur_enddate'] > 0 && (int)$old_repeats['recur_enddate'] > 0 && (int)$old_repeats['recur_enddate'] < (int)$event['recur_enddate'])
)
{
$set_recurrences = true;
$set_recurrences_start = ($old_repeats['recur_enddate'] + 1*DAY_s);
}
}
// truncate recurrences by given exceptions
if (count($event['recur_exception']))
{
// added and existing exceptions: delete the execeptions from the user and dates table, it could be the first time
$this->db->delete($this->user_table,array('cal_id' => $cal_id,'cal_recur_date' => $event['recur_exception']),__LINE__,__FILE__,'calendar');
$this->db->delete($this->dates_table,array('cal_id' => $cal_id,'cal_start' => $event['recur_exception']),__LINE__,__FILE__,'calendar');
}
}
// write the repeats table
$event['recur_exception'] = empty($event['recur_exception']) ? null : implode(',',$event['recur_exception']);
unset($event[0]); // unset the 'etag=etag+1', as it's not in the repeats table
if($event['recur_type'] != MCAL_RECUR_NONE)
{
$this->db->insert($this->repeats_table,$event,array('cal_id' => $cal_id),__LINE__,__FILE__,'calendar');
}
else
{
$this->db->delete($this->repeats_table,array('cal_id' => $cal_id),__LINE__,__FILE__,'calendar');
}
}
// update start- and endtime if present in the event-array, evtl. we need to move all recurrences
if (isset($event['cal_start']) && isset($event['cal_end']))
{
$this->move($cal_id,$event['cal_start'],$event['cal_end'],!$cal_id ? false : $change_since);
}
// update participants if present in the event-array
if (isset($event['cal_participants']))
{
$this->participants($cal_id,$event['cal_participants'],!$cal_id ? false : $change_since);
}
// Custom fields
foreach($event as $name => $value)
{
if ($name[0] == '#')
{
if (strlen($value))
{
$this->db->insert($this->extra_table,array(
'cal_extra_value' => $value,
),array(
'cal_id' => $cal_id,
'cal_extra_name' => substr($name,1),
),__LINE__,__FILE__,'calendar');
}
else
{
$this->db->delete($this->extra_table,array(
'cal_id' => $cal_id,
'cal_extra_name' => substr($name,1),
),__LINE__,__FILE__,'calendar');
}
}
}
// updating or saving the alarms, new alarms have a temporary numeric id!
// ToDo: recuring events !!!
if (is_array($event['alarm']))
{
foreach ($event['alarm'] as $id => $alarm)
{
if (is_numeric($id)) unset($alarm['id']); // unset the temporary id, to add the alarm
if(!isset($alarm['offset']))
{
$alarm['offset'] = $event['cal_start'] - $alarm['time'];
}
elseif (!isset($alarm['time']))
{
$alarm['time'] = $event['cal_start'] - $alarm['offset'];
}
//pgoerzen: don't add an alarm if it is before the current date.
/*if ($event['recur_type'] && ($tmp_event = $this->read($eventID, time() + $alarm['offset'])))
{
$alarm['time'] = $tmp_event['cal_start'] - $alarm['offset'];
} */
$this->save_alarm($cal_id,$alarm);
}
}
if (is_null($etag))
{
$etag = $this->db->select($this->cal_table,'cal_etag',array('cal_id' => $cal_id),__LINE__,__FILE__,false,'','calendar')->fetchColumn();
}
return $cal_id;
}
/**
* moves an event to an other start- and end-time taken into account the evtl. recurrences of the event(!)
*
* @param int $cal_id
* @param int $start new starttime
* @param int $end new endtime
* @param int|boolean $change_since=0 false=new entry, > 0 time from which on the repetitions should be changed, default 0=all
* @param int $old_start=0 old starttime or (default) 0, to query it from the db
* @param int $old_end=0 old starttime or (default) 0
* @return int|boolean number of moved recurrences or false on error
*/
function move($cal_id,$start,$end,$change_since=0,$old_start=0,$old_end=0)
{
//echo "<p>socal::move($cal_id,$start,$end,$change_since,$old_start,$old_end)</p>\n";
if (!(int) $cal_id) return false;
if (!$old_start)
{
if ($change_since !== false) $row = $this->db->select($this->dates_table,'MIN(cal_start) AS cal_start,MIN(cal_end) AS cal_end',
array('cal_id'=>$cal_id),__LINE__,__FILE__,false,'','calendar')->fetch();
// if no recurrence found, create one with the new dates
if ($change_since === false || !$row || !$row['cal_start'] || !$row['cal_end'])
{
$this->db->insert($this->dates_table,array(
'cal_id' => $cal_id,
'cal_start' => $start,
'cal_end' => $end,
),false,__LINE__,__FILE__,'calendar');
return 1;
}
$move_start = (int) ($start-$row['cal_start']);
$move_end = (int) ($end-$row['cal_end']);
}
else
{
$move_start = (int) ($start-$old_start);
$move_end = (int) ($end-$old_end);
}
$where = 'cal_id='.(int)$cal_id;
if ($move_start)
{
// move the recur-date of the participants
$this->db->query("UPDATE $this->user_table SET cal_recur_date=cal_recur_date+$move_start WHERE $where AND cal_recur_date ".
((int)$change_since ? '>= '.(int)$change_since : '!= 0'),__LINE__,__FILE__);
}
if ($move_start || $move_end)
{
// move the event and it's recurrences
$this->db->query("UPDATE $this->dates_table SET cal_start=cal_start+$move_start,cal_end=cal_end+$move_end WHERE $where".
((int) $change_since ? ' AND cal_start >= '.(int) $change_since : ''),__LINE__,__FILE__);
}
return $this->db->affected_rows();
}
/**
* combines user_type and user_id into a single string or integer (for users)
*
* @param string $user_type 1-char type: 'u' = user, ...
* @param string|int $user_id id
* @return string|int combined id
*/
static function combine_user($user_type,$user_id)
{
if (!$user_type || $user_type == 'u')
{
return (int) $user_id;
}
return $user_type.$user_id;
}
/**
* splits the combined user_type and user_id into a single values
*
* @param string|int $uid
* @param string &$user_type 1-char type: 'u' = user, ...
* @param string|int &$user_id id
*/
static function split_user($uid,&$user_type,&$user_id)
{
if (is_numeric($uid))
{
$user_type = 'u';
$user_id = (int) $uid;
}
else
{
$user_type = $uid[0];
$user_id = substr($uid,1);
}
}
/**
* Combine status, quantity and role into one value
*
* @param string $status
* @param int $quantity
* @param string $role
* @return string
*/
static function combine_status($status,$quantity,$role)
{
if ((int)$quantity > 1) $status .= (int)$quantity;
if ($role != 'REQ-PARTICIPANT') $status .= $role;
return $status;
}
/**
* splits the combined status, quantity and role
*
* @param string &$status I: combined value, O: status letter: U, T, A, R
* @param int &$quantity only O: quantity
* @param string &$role only O: role
*/
static function split_status(&$status,&$quantity,&$role)
{
$quantity = 1;
$role = 'REQ-PARTICIPANT';
if (strlen($status) > 1 && preg_match('/^.([0-9]*)(.*)$/',$status,$matches))
{
if ((int)$matches[1] > 0) $quantity = (int)$matches[1];
$role = $matches[2];
$status = $status[0];
}
}
/**
* updates the participants of an event, taken into account the evtl. recurrences of the event(!)
* this method just adds new participants or removes not longer set participants
* this method does never overwrite existing entries (except for delete)
*
* @param int $cal_id
* @param array $participants uid => status pairs
* @param int|boolean $change_since=0, false=new entry, 0=all, > 0 time from which on the repetitions should be changed
* @param boolean $add_only=false
* false = add AND delete participants if needed (full list of participants required in $participants)
* true = only add participants if needed, no participant will be deleted (participants to check/add required in $participants)
* @return int|boolean number of updated recurrences or false on error
*/
function participants($cal_id,$participants,$change_since=0,$add_only=false)
{
// remove group-invitations, they are NOT stored in the db
foreach($participants as $uid => $status)
{
if ($status[0] == 'G')
{
unset($participants[$uid]);
}
}
$where = array('cal_id' => $cal_id);
if ((int) $change_since)
{
$where[] = '(cal_recur_date=0 OR cal_recur_date >= '.(int)$change_since.')';
}
if ($change_since !== false) // update existing entries
{
$existing_entries = $this->db->select($this->user_table,'DISTINCT cal_user_type,cal_user_id',$where,__LINE__,__FILE__,false,'','calendar');
// create a full list of participants which already exist in the db
$old_participants = array();
foreach($existing_entries as $row)
{
$old_participants[self::combine_user($row['cal_user_type'],$row['cal_user_id'])] = true;
}
// tag participants which should be deleted
if($add_only === false)
{
$deleted = array();
foreach($existing_entries as $row)
{
$uid = self::combine_user($row['cal_user_type'],$row['cal_user_id']);
// delete not longer set participants
if (!isset($participants[$uid]))
{
$deleted[$row['cal_user_type']][] = $row['cal_user_id'];
}
}
}
// only keep added participants for further steps - we do not touch existing ones
$participants = array_diff_key($participants,$old_participants);
// delete participants tagged for delete
if ($add_only === false && count($deleted))
{
$to_or = array();
$table_def = $this->db->get_table_definitions('calendar',$this->user_table);
foreach($deleted as $type => $ids)
{
$to_or[] = $this->db->expression($table_def,array(
'cal_user_type' => $type,
'cal_user_id' => $ids,
));
}
$this->db->delete($this->user_table,$where + array('('.implode(' OR ',$to_or).')'),__LINE__,__FILE__,'calendar');
}
}
if (count($participants)) // participants which need to be added
{
// find all recurrences, as they all need the new parts to be added
$recurrences = array();
if ($change_since !== false) // existing entries
{
foreach($this->db->select($this->user_table,'DISTINCT cal_recur_date',$where,__LINE__,__FILE__,false,'','calendar') as $row)
{
$recurrences[] = $row['cal_recur_date'];
}
}
if (!count($recurrences)) $recurrences[] = 0; // insert the default one
// update participants
foreach($participants as $uid => $status)
{
$id = null;
self::split_user($uid,$type,$id);
self::split_status($status,$quantity,$role);
$set = array(
'cal_status' => $status,
'cal_quantity' => $quantity,
'cal_role' => $role,
);
foreach($recurrences as $recur_date)
{
$this->db->insert($this->user_table,$set,array(
'cal_id' => $cal_id,
'cal_recur_date' => $recur_date,
'cal_user_type' => $type,
'cal_user_id' => $id,
),__LINE__,__FILE__,'calendar');
}
}
}
return true;
}
/**
* set the status of one participant for a given recurrence or for all recurrences since now (includes recur_date=0)
*
* @param int $cal_id
* @param char $user_type 'u' regular user, 'r' resource, 'c' contact
* @param int $user_id
* @param int|char $status numeric status (defines) or 1-char code: 'R', 'U', 'T' or 'A'
* @param int $recur_date=0 date to change, or 0 = all since now
* @param string $role=null role to set if !is_null($role)
* @return int number of changed recurrences
*/
function set_status($cal_id,$user_type,$user_id,$status,$recur_date=0,$role=null)
{
static $status_code_short = array(
REJECTED => 'R',
NO_RESPONSE => 'U',
TENTATIVE => 'T',
ACCEPTED => 'A'
);
if (!(int)$cal_id || !(int)$user_id && $user_type != 'e')
{
return false;
}
if (is_numeric($status)) $status = $status_code_short[$status];
$where = array(
'cal_id' => $cal_id,
'cal_user_type' => $user_type ? $user_type : 'u',
'cal_user_id' => $user_id,
);
if ((int) $recur_date)
{
$where['cal_recur_date'] = $recur_date;
}
else
{
$where[] = '(cal_recur_date=0 OR cal_recur_date >= '.time().')';
}
// check if the user has any status database entries and create the default set if needed
// a status update before having the necessary entries happens on e.g. group invitations
$this->participants($cal_id,array(self::combine_user($user_type,$user_id) => 'U'),0,true);
if ($status == 'G') // remove group invitations, as we dont store them in the db
{
$this->db->delete($this->user_table,$where,__LINE__,__FILE__,'calendar');
}
else
{
$set = array('cal_status' => $status);
if (!is_null($role)) $set['cal_role'] = $role;
$this->db->insert($this->user_table,$set,$where,__LINE__,__FILE__,'calendar');
}
$ret = $this->db->affected_rows();
//error_log(__METHOD__."($cal_id,$user_type,$user_id,$status,$recur_date) = $ret");
return $ret;
}
/**
* creates or update a recurrence in the dates and users table
*
* @param int $cal_id
* @param int $start
* @param int $end
* @param array $participants uid => status pairs
*/
function recurrence($cal_id,$start,$end,$participants)
{
//echo "<p>socal::recurrence($cal_id,$start,$end,".print_r($participants,true).")</p>\n";
$this->db->insert($this->dates_table,array(
'cal_end' => $end,
),array(
'cal_id' => $cal_id,
'cal_start' => $start,
),__LINE__,__FILE__,'calendar');
foreach($participants as $uid => $status)
{
if ($status == 'G') continue; // dont save group-invitations
$type = '';
$id = null;
$this->split_user($uid,$type,$id);
$this->db->insert($this->user_table,array(
'cal_status' => $status !== true ? $status[0] : 'U',
'cal_quantity' => substr($status,1) ? substr($status,1) : 1,
),array(
'cal_id' => $cal_id,
'cal_recur_date' => $start,
'cal_user_type' => $type,
'cal_user_id' => $id,
),__LINE__,__FILE__,'calendar');
}
}
/**
* Get all unfinished recuring events (or all users) after a given time
*
* @param int $time
* @return array with cal_id => max(cal_start) pairs
*/
function unfinished_recuring($time)
{
$ids = array();
foreach($this->db->select($this->repeats_table,"$this->repeats_table.cal_id,MAX(cal_start) AS cal_start",array(
"$this->repeats_table.cal_id = $this->dates_table.cal_id",
'(recur_enddate = 0 OR recur_enddate IS NULL OR recur_enddate > '.(int)$time.')',
),__LINE__,__FILE__,false,"GROUP BY $this->repeats_table.cal_id",'calendar',0,','.$this->dates_table) as $row)
{
$ids[$row['cal_id']] = $row['cal_start'];
}
return $ids;
}
/**
* deletes an event incl. all recurrences, participants and alarms
*
* @param int $cal_id
*/
function delete($cal_id)
{
//echo "<p>socal::delete($cal_id)</p>\n";
$this->delete_alarms($cal_id);
foreach($this->all_tables as $table)
{
$this->db->delete($table,array('cal_id'=>$cal_id),__LINE__,__FILE__,'calendar');
}
}
/**
* read the alarms of a calendar-event specified by $cal_id
*
* alarm-id is a string of 'cal:'.$cal_id.':'.$alarm_nr, it is used as the job-id too
*
* @param int $cal_id
* @return array of alarms with alarm-id as key
*/
function read_alarms($cal_id)
{
$alarms = array();
if ($jobs = $this->async->read('cal:'.(int)$cal_id.':%'))
{
foreach($jobs as $id => $job)
{
$alarm = $job['data']; // text, enabled
$alarm['id'] = $id;
$alarm['time'] = $job['next'];
$alarms[$id] = $alarm;
}
}
return $alarms;
}
/**
* read a single alarm specified by it's $id
*
* @param string $id alarm-id is a string of 'cal:'.$cal_id.':'.$alarm_nr, it is used as the job-id too
* @return array with data of the alarm
*/
function read_alarm($id)
{
if (!($jobs = $this->async->read($id)))
{
return False;
}
list($id,$job) = each($jobs);
$alarm = $job['data']; // text, enabled
$alarm['id'] = $id;
$alarm['time'] = $job['next'];
//echo "<p>read_alarm('$id')="; print_r($alarm); echo "</p>\n";
return $alarm;
}
/**
* saves a new or updated alarm
*
* @param int $cal_id Id of the calendar-entry
* @param array $alarm array with fields: text, owner, enabled, ..
* @param timestamp $now_su=0 timestamp for modification of related event
* @return string id of the alarm
*/
function save_alarm($cal_id, $alarm, $now_su = 0)
{
//echo "<p>save_alarm(cal_id=$cal_id, alarm="; print_r($alarm); echo ")</p>\n";
if (!($id = $alarm['id']))
{
$alarms = $this->read_alarms($cal_id); // find a free alarm#
$n = count($alarms);
do
{
$id = 'cal:'.(int)$cal_id.':'.$n;
++$n;
}
while (@isset($alarms[$id]));
}
else
{
$this->async->cancel_timer($id);
}
$alarm['cal_id'] = $cal_id; // we need the back-reference
if (!$this->async->set_timer($alarm['time'],$id,'calendar.calendar_boupdate.send_alarm',$alarm))
{
return False;
}
// update the modification information of the related event
$datetime = $GLOBALS['egw']->datetime;
$now = ($now_su ? $now_su : time() + $datetime->this->tz_offset);
$modifier = $GLOBALS['egw_info']['user']['account_id'];
$this->db->update($this->cal_table, array('cal_modified' => $now, 'cal_modifier' => $modifier),
array('cal_id' => $cal_id), __LINE__, __FILE__, 'calendar');
return $id;
}
/**
* delete all alarms of a calendar-entry
*
* @param int $cal_id Id of the calendar-entry
* @return int number of alarms deleted
*/
function delete_alarms($cal_id)
{
$alarms = $this->read_alarms($cal_id);
foreach($alarms as $id => $alarm)
{
$this->async->cancel_timer($id);
}
return count($alarms);
}
/**
* delete one alarms identified by its id
*
* @param string $id alarm-id is a string of 'cal:'.$cal_id.':'.$alarm_nr, it is used as the job-id too
* @param timestamp $now_su=0 timestamp for modification of related event
* @return int number of alarms deleted
*/
function delete_alarm($id, $now_su = 0)
{
// update the modification information of the related event
list(,$cal_id) = explode(':',$id);
if ($cal_id)
{
$datetime = $GLOBALS['egw']->datetime;
$now = ($now_su ? $now_su : time() + $datetime->this->tz_offset);
$modifier = $GLOBALS['egw_info']['user']['account_id'];
$this->db->update($this->cal_table, array('cal_modified' => $now, 'cal_modifier' => $modifier),
array('cal_id' => $cal_id), __LINE__, __FILE__, 'calendar');
}
return $this->async->cancel_timer($id);
}
/**
* Delete account hook
*
* @param array|int $old_user integer old user or array with keys 'account_id' and 'new_owner' as the deleteaccount hook uses it
* @param int $new_user=null
*/
function deleteaccount($old_user, $newuser=null)
{
if (is_array($old_user))
{
$new_user = $old_user['new_owner'];
$old_user = $old_user['account_id'];
}
if (!(int)$new_user)
{
$user_type = '';
$user_id = null;
$this->split_user($old_user,$user_type,$user_id);
if ($user_type == 'u') // only accounts can be owners of events
{
foreach($this->db->select($this->cal_table,'cal_id',array('cal_owner' => $old_user),__LINE__,__FILE__,false,'','calendar') as $row)
{
$this->delete($row['cal_id']);
}
}
$this->db->delete($this->user_table,array(
'cal_user_type' => $user_type,
'cal_user_id' => $user_id,
),__LINE__,__FILE__,'calendar');
// delete calendar entries without participants (can happen if the deleted user is the only participants, but not the owner)
foreach($this->db->select($this->cal_table,"DISTINCT $this->cal_table.cal_id",'cal_user_id IS NULL',__LINE__,__FILE__,
False,'','calendar',0,"LEFT JOIN $this->user_table ON $this->cal_table.cal_id=$this->user_table.cal_id") as $row)
{
$this->delete($row['cal_id']);
}
}
else
{
$this->db->update($this->cal_table,array('cal_owner' => $new_user),array('cal_owner' => $old_user),__LINE__,__FILE__,'calendar');
// delete participation of old user, if new user is already a participant
$ids = array();
foreach($this->db->select($this->user_table,'cal_id',array( // MySQL does NOT allow to run this as delete!
'cal_user_type' => 'u',
'cal_user_id' => $old_user,
"cal_id IN (SELECT cal_id FROM $this->user_table other WHERE other.cal_id=cal_id AND other.cal_user_id=".(int)$new_user." AND cal_user_type='u')",
),__LINE__,__FILE__,false,'','calendar') as $row)
{
$ids[] = $row['cal_id'];
}
if ($ids) $this->db->delete($this->user_table,array(
'cal_user_type' => 'u',
'cal_user_id' => $old_user,
'cal_id' => $ids,
),__LINE__,__FILE__,'calendar');
// now change participant in the rest to contain new user instead of old user
$this->db->update($this->user_table,array(
'cal_user_id' => $new_user,
),array(
'cal_user_type' => 'u',
'cal_user_id' => $old_user,
),__LINE__,__FILE__,'calendar');
}
}
/**
* get stati of all recurrences of an event for a specific participant
*
* @param int $cal_id
* @param int $uid participant uid
* @return array recur_date => status pairs (index 0 => main status)
*/
function get_recurrences($cal_id, $uid)
{
$user_type = $user_id = null;
$this->split_user($uid, $user_type, $user_id);
$participant_status = array();
$where = array('cal_id' => $cal_id);
foreach($this->db->select($this->user_table,'DISTINCT cal_recur_date',$where,__LINE__,__FILE__,false,'','calendar') as $row)
{
// inititalize the array
$participant_status[$row['cal_recur_date']] = null;
}
$where = array(
'cal_id' => $cal_id,
'cal_user_type' => $user_type ? $user_type : 'u',
'cal_user_id' => $user_id,
);
foreach ($this->db->select($this->user_table,'cal_recur_date,cal_status',$where,
__LINE__,__FILE__,false,'','calendar') as $row)
{
$participant_status[$row['cal_recur_date']] = $row['cal_status'];
}
return $participant_status;
}
/**
* get all participants of an event
*
* @param int $cal_id
* @param int $recur_date=0 gives participants of this recurrence, default 0=all
*
* @return array participants
*/
function get_participants($cal_id, $recur_date=0)
{
$participants = array();
$where = array('cal_id' => $cal_id);
if ($recur_date)
{
$where['cal_recur_date'] = $recur_date;
}
foreach ($this->db->select($this->user_table,'DISTINCT cal_user_type,cal_user_id', $where,
__LINE__,__FILE__,false,'','calendar') as $row)
{
$uid = $this->combine_user($row['cal_user_type'], $row['cal_user_id']);
$id = $row['cal_user_type'] . $row['cal_user_id'];
$participants[$id]['type'] = $row['cal_user_type'];
$participants[$id]['id'] = $row['cal_user_id'];
$participants[$id]['uid'] = $uid;
}
return $participants;
}
/**
* get all releated events
*
* @param int $uid UID of the series
*
* @return array of event exception ids for all events which share $uid
*/
function get_related($uid)
{
$where = array(
'cal_uid' => $uid,
);
$related = array();
foreach ($this->db->select($this->cal_table,'cal_id,cal_reference',$where,
__LINE__,__FILE__,false,'','calendar') as $row)
{
if ($row['cal_reference'])
{
// not the series entry itself
$related[$row['cal_id']] = $row['cal_reference'];
}
}
return $related;
}
/**
* Gets the exception days of a given recurring event caused by
* irregular participant stati
*
* @param array $event Recurring Event.
*
* @return array Array of exception days (false for non-recurring events).
*/
function get_recurrence_exceptions(&$event)
{
$cal_id = (int) $event['id'];
if (!$cal_id || $event['recur_type'] == MCAL_RECUR_NONE) return false;
$days = array();
$participants = $this->get_participants($event['id'], 0);
// Check if the stati for all participants are identical for all recurrences
foreach ($participants as $uid => $attendee)
{
switch ($attendee['type'])
{
case 'u': // account
case 'c': // contact
case 'e': // email address
$recurrences = $this->get_recurrences($event['id'], $uid);
foreach ($recurrences as $recur_date => $recur_status)
{
if ($recur_date && $recur_status != $recurrences[0])
{
// Every distinct status results in an exception
$days[] = $recur_date;
}
}
break;
default: // We don't handle the rest
break;
}
}
$days = array_unique($days);
sort($days);
return $days;
}
}
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