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Public Member Functions | Protected Member Functions | Protected Attributes
ilCalendarRecurrenceCalculator Class Reference
Services/Calendar

Calculates an ilDateList for a given calendar entry and recurrence rule. More...

+ Collaboration diagram for ilCalendarRecurrenceCalculator:

Public Member Functions

 __construct (ilDatePeriod $entry, ilCalendarRecurrence $rec)
 public
 calculateDateListByMonth ($a_month, $a_year)
 calculate day list by month(s) uses a cache of calculated recurring events public
 calculateDateList (ilDateTime $a_start, ilDateTime $a_end, $a_limit=-1)
 calculate date list

Protected Member Functions

 adjustTimeZones (ilDateTime $a_start, ilDateTime $a_end)
 Adjust timezone.
 optimizeStartingTime ()
 optimize starting time
 incrementByFrequency ($start)
 increment starting time by frequency
 applyBYMONTHRules (ilDateList $list)
 Apply BYMONTH rules.
 applyBYWEEKNORules (ilDateList $list)
 Apply BYWEEKNO rules (1 to 53 and -1 to -53).
 applyBYYEARDAYRules (ilDateList $list)
 Apply BYYEARDAY rules.
 applyBYMONTHDAYRules (ilDateList $list)
 Apply BYMONTHDAY rules.
 applyBYDAYRules (ilDateList $list)
 Apply BYDAY rules.
 getYearWeekDays (ilDateTime $seed)
 get a list of year week days according to the BYMONTH rule
 getMonthWeekDays ($year, $month)
 get a list of month days
 getWeekWeekDays ($seed_info)
 get weedays of week
 applyBYSETPOSRules (ilDateList $list)
 Apply BYSETPOST rules.
 applyLimits (ilDateList $list)
 Apply limits (count or until)
 initDateList ()
 init date list
 createDate ($a_date, $a_format_type=IL_CAL_UNIX)
 create date
 validateRecurrence ()
 validate recurrence

Protected Attributes

 $timezone = null
 $log = null
 $limit_reached = false
 $valid_dates = null
 $period_start = null
 $period_end = null
 $start = null
 $event = null
 $recurrence = null
 $frequence_context = 0

Detailed Description

Calculates an ilDateList for a given calendar entry and recurrence rule.

Author
Stefan Meyer smeye.nosp@m.r@da.nosp@m.tabay.nosp@m..de
Version
$Id$

Definition at line 39 of file class.ilCalendarRecurrenceCalculator.php.

Constructor & Destructor Documentation

ilCalendarRecurrenceCalculator::__construct ( ilDatePeriod  $entry,
ilCalendarRecurrence  $rec 
)

public

Parameters
ilDatePeriodinterface ilDatePeriod

Definition at line 62 of file class.ilCalendarRecurrenceCalculator.php.

References $ilLog.

{
global $ilLog;
$this->log = $ilLog;
$this->event = $entry;
$this->recurrence = $rec;
}

Member Function Documentation

ilCalendarRecurrenceCalculator::adjustTimeZones ( ilDateTime  $a_start,
ilDateTime  $a_end 
)
protected

Adjust timezone.

protected

Definition at line 186 of file class.ilCalendarRecurrenceCalculator.php.

References ilTimeZone\_setDefaultTimeZone(), ilDateTime\switchTimeZone(), and ilTimeZone\UTC.

Referenced by calculateDateList().

{
$this->timezone = $this->event->isFullday() ? ilTimeZone::UTC : $this->recurrence->getTimeZone();
ilTimeZone::_setDefaultTimeZone($this->timezone);
$this->period_start = clone $a_start;
$this->period_end = clone $a_end;
$this->start = clone $this->event->getStart();
try
{
if($this->event->isFullday())
{
$this->period_start->switchTimeZone(ilTimeZone::UTC);
$this->period_end->switchTimeZone(ilTimeZone::UTC);
$this->start->switchTimeZone(ilTimeZone::UTC);
}
else
{
$this->period_start->switchTimeZone($this->recurrence->getTimeZone());
$this->period_end->switchTimeZone($this->recurrence->getTimeZone());
$this->start->switchTimeZone($this->recurrence->getTimeZone());
}
return true;
}
catch(ilDateTimeException $e)
{
$this->log->write(__METHOD__.': '.$e->getMessage());
return false;
}
}

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ilCalendarRecurrenceCalculator::applyBYDAYRules ( ilDateList  $list)
protected

Apply BYDAY rules.

protected

Parameters
objectilDateList
Returns
object ilDateList

Definition at line 550 of file class.ilCalendarRecurrenceCalculator.php.

References $start, createDate(), ilCalendarRecurrence\FREQ_DAILY, ilCalendarRecurrence\FREQ_MONTHLY, ilCalendarRecurrence\FREQ_WEEKLY, ilCalendarRecurrence\FREQ_YEARLY, ilDateList\get(), getMonthWeekDays(), getWeekWeekDays(), getYearWeekDays(), IL_CAL_DAY, IL_CAL_FKT_DATE, IL_CAL_FKT_GETDATE, and initDateList().

Referenced by calculateDateList().

{
// return unmodified, if no byday rules are available
if(!$this->recurrence->getBYDAYList())
{
return $list;
}
$days_list = $this->initDateList();
// generate a list of e.g all Sundays for the given year
// or e.g a list of all week days in a give month (FREQ = MONTHLY,WEEKLY or DAILY)
foreach($list->get() as $seed)
{
$seed_info = $seed->get(IL_CAL_FKT_GETDATE);
// TODO: maybe not correct in dst cases
$date_info = $seed->get(IL_CAL_FKT_GETDATE);
$date_info['mday'] = 1;
$date_info['mon'] = 1;
$start = $this->createDate($date_info,IL_CAL_FKT_GETDATE);
switch($this->frequence_context)
{
case ilCalendarRecurrence::FREQ_YEARLY:
$day_sequence = $this->getYearWeekDays($seed);
break;
case ilCalendarRecurrence::FREQ_MONTHLY:
$day_sequence = $this->getMonthWeekDays($seed_info['year'],$seed_info['mon']);
break;
case ilCalendarRecurrence::FREQ_WEEKLY:
// TODO or RFC bug: FREQ>WEEKLY;BYMONTH=1;BYDAY=FR returns FR 1.2.2008
// Ical says: apply BYMONTH rules and after that apply byday rules on that date list.
$day_sequence = $this->getWeekWeekDays($seed_info);
break;
case ilCalendarRecurrence::FREQ_DAILY:
$day_sequence[strtoupper(substr($seed->get(IL_CAL_FKT_DATE,'D'),0,2))] = array($seed_info['yday']);
break;
}
foreach($this->recurrence->getBYDAYList() as $byday)
{
$year_day = array();
$day = strtoupper(substr($byday,-2));
$num_by_day = (int) $byday;
if($num_by_day)
{
if($num_by_day > 0)
{
if(isset($day_sequence[$day][$num_by_day - 1]))
{
$year_day = array($day_sequence[$day][$num_by_day - 1]);
}
}
else
{
if(isset($day_sequence[$day][count($day_sequence[$day]) + $num_by_day]))
{
$year_day = array($day_sequence[$day][count($day_sequence[$day]) + $num_by_day]);
}
}
}
else
{
if(isset($day_sequence[$day]))
{
$year_day = $day_sequence[$day];
}
}
foreach($year_day as $day)
{
switch($this->frequence_context)
{
case ilCalendarRecurrence::FREQ_WEEKLY:
case ilCalendarRecurrence::FREQ_DAILY:
case ilCalendarRecurrence::FREQ_MONTHLY:
case ilCalendarRecurrence::FREQ_YEARLY:
$tmp_date = clone $start;
$tmp_date->increment(IL_CAL_DAY,$day);
$days_list->add($tmp_date);
break;
}
}
}
}
#echo $days_list;
return $days_list;
}

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ilCalendarRecurrenceCalculator::applyBYMONTHDAYRules ( ilDateList  $list)
protected

Apply BYMONTHDAY rules.

protected

Definition at line 444 of file class.ilCalendarRecurrenceCalculator.php.

References $y, ilTimeZone\_getInstance(), ilCalendarUtil\_getMaxDayOfMonth(), createDate(), ilDateTime\DAY, ilCalendarRecurrence\FREQ_DAILY, ilCalendarRecurrence\FREQ_MONTHLY, ilCalendarRecurrence\FREQ_WEEKLY, ilCalendarRecurrence\FREQ_YEARLY, ilDateList\get(), IL_CAL_FKT_DATE, IL_CAL_UNIX, and initDateList().

Referenced by calculateDateList().

{
// return unmodified, if no byweekno rules are available
if(!$this->recurrence->getBYMONTHDAYList())
{
return $list;
}
$days_list = $this->initDateList();
foreach($list->get() as $seed)
{
$num_days = ilCalendarUtil::_getMaxDayOfMonth(
$seed->get(IL_CAL_FKT_DATE,'Y',$this->timezone),
$seed->get(IL_CAL_FKT_DATE,'n',$this->timezone));
/*
$num_days = cal_days_in_month(CAL_GREGORIAN,
$seed->get(IL_CAL_FKT_DATE,'n',$this->timezone),
$seed->get(IL_CAL_FKT_DATE,'Y',$this->timezone));
*/
#$this->log->write(__METHOD__.': Month '.$seed->get(IL_CAL_FKT_DATE,'M',$this->timezone).' has '.$num_days.' days.');
foreach($this->recurrence->getBYMONTHDAYList() as $bymonth_no)
{
$day_no = $bymonth_no < 0 ? ($num_days + $bymonth_no + 1) : $bymonth_no;
if($this->frequence_context != ilCalendarRecurrence::FREQ_YEARLY)
{
if($day_no < 1 or $day_no > $num_days)
{
$this->log->write(__METHOD__.': Ignoring BYMONTHDAY rule: '.$day_no.' for month '.
$seed->get(IL_CAL_FKT_DATE,'M',$this->timezone));
continue;
}
}
$day_diff = $day_no - $seed->get(IL_CAL_FKT_DATE,'j',$this->timezone);
$new_day = $this->createDate($seed->get(IL_CAL_UNIX,'',$this->timezone));
$new_day->increment(ilDateTime::DAY,$day_diff);
switch($this->frequence_context)
{
case ilCalendarRecurrence::FREQ_DAILY:
// Check if day matches
#var_dump("<pre>",$seed->get(IL_CAL_FKT_DATE,'z',$this->timezone),$day_no,"</pre>");
if($seed->get(IL_CAL_FKT_DATE,'j',$this->timezone) == $day_no)
{
$days_list->add($new_day);
}
break;
case ilCalendarRecurrence::FREQ_WEEKLY:
// Check if week matches
if($seed->get(IL_CAL_FKT_DATE,'W',$this->timezone) == $new_day->get(IL_CAL_FKT_DATE,'W',$this->timezone))
{
$days_list->add($new_day);
}
break;
case ilCalendarRecurrence::FREQ_MONTHLY:
// seed and new day are in the same month.
$days_list->add($new_day);
break;
case ilCalendarRecurrence::FREQ_YEARLY:
$h = $this->event->isFullday() ? 0 : $seed->get(IL_CAL_FKT_DATE,'H',$this->timezone);
$i = $this->event->isFullday() ? 0 : $seed->get(IL_CAL_FKT_DATE,'i',$this->timezone);
$s = $this->event->isFullday() ? 0 : $seed->get(IL_CAL_FKT_DATE,'s',$this->timezone);
$y = $seed->get(IL_CAL_FKT_DATE,'Y',$this->timezone);
// TODO: the chosen monthday has to added to all months
for($month = 1;$month <= 12;$month++)
{
#$num_days = cal_days_in_month(CAL_GREGORIAN,
# $month,
# $y);
$num_days = ilCalendarUtil::_getMaxDayOfMonth(
$y,
$month);
$day_no = $bymonth_no < 0 ? ($num_days + $bymonth_no + 1) : $bymonth_no;
if($day_no < 1 or $day_no > $num_days)
{
$this->log->write(__METHOD__.': Ignoring BYMONTHDAY rule: '.$day_no.' for month '.$month);
}
else
{
$tz_obj = ilTimeZone::_getInstance($this->timezone);
$tz_obj->switchTZ();
$unix = mktime($h,$i,$s,$month,$day_no,$y);
$tz_obj->restoreTZ();
$new_day = $this->createDate($unix);
$days_list->add($new_day);
}
}
break;
}
}
}
$this->frequence_context = ilCalendarRecurrence::FREQ_DAILY;
return $days_list;
}

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ilCalendarRecurrenceCalculator::applyBYMONTHRules ( ilDateList  $list)
protected

Apply BYMONTH rules.

protected

Returns
object ilDateList

Definition at line 284 of file class.ilCalendarRecurrenceCalculator.php.

References createDate(), elseif(), ilCalendarRecurrence\FREQ_MONTHLY, ilCalendarRecurrence\FREQ_YEARLY, ilDateList\get(), IL_CAL_FKT_DATE, IL_CAL_UNIX, initDateList(), and ilDateTime\MONTH.

Referenced by calculateDateList().

{
// return unmodified, if no bymonth rules are available
if(!$this->recurrence->getBYMONTHList())
{
return $list;
}
$month_list = $this->initDateList();
foreach($list->get() as $date)
{
#echo "SEED: ".$seed;
foreach($this->recurrence->getBYMONTHList() as $month)
{
#echo "RULW_MONTH:".$month;
// YEARLY rules extend the seed to every month given in the BYMONTH rule
// Rules < YEARLY must match the month of the seed
if($this->recurrence->getFrequenceType() == ilCalendarRecurrence::FREQ_YEARLY)
{
$month_date = $this->createDate($date->get(IL_CAL_UNIX,'',$this->timezone));
$month_date->increment(ilDateTime::MONTH,-($date->get(IL_CAL_FKT_DATE,'n',$this->timezone) - $month));
#echo "BYMONTH: ".$month_date;
$month_list->add($month_date);
}
elseif($date->get(IL_CAL_FKT_DATE,'n',$this->timezone) == $month)
{
$month_list->add($date);
}
}
}
// decrease the frequence_context for YEARLY rules
if($this->recurrence->getFrequenceType() == ilCalendarRecurrence::FREQ_YEARLY)
{
$this->frequence_context = ilCalendarRecurrence::FREQ_MONTHLY;
}
return $month_list;
}

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ilCalendarRecurrenceCalculator::applyBYSETPOSRules ( ilDateList  $list)
protected

Apply BYSETPOST rules.

protected

Parameters
objectilDateList
Returns
object ilDateList

Definition at line 742 of file class.ilCalendarRecurrenceCalculator.php.

References ilDateList\get(), ilDateList\getAtPosition(), initDateList(), and ilDateList\sort().

Referenced by calculateDateList().

{
// return unmodified, if no bysetpos rules are available
if(!$this->recurrence->getBYSETPOSList())
{
return $list;
}
$pos_list = $this->initDateList();
$list->sort();
$candidates = $list->get();
$candidates_count = count($candidates);
foreach($this->recurrence->getBYSETPOSList() as $position)
{
if($position > 0 and $date = $list->getAtPosition($position))
{
$pos_list->add($date);
}
if($position < 0 and $date = $list->getAtPosition($candidates_count + $position + 1))
{
$pos_list->add($date);
}
}
return $pos_list;
}

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ilCalendarRecurrenceCalculator::applyBYWEEKNORules ( ilDateList  $list)
protected

Apply BYWEEKNO rules (1 to 53 and -1 to -53).

This rule can only be applied to YEARLY rules (RFC 2445 4.3.10)

protected

Definition at line 330 of file class.ilCalendarRecurrenceCalculator.php.

References createDate(), ilCalendarRecurrence\FREQ_MONTHLY, ilCalendarRecurrence\FREQ_WEEKLY, ilCalendarRecurrence\FREQ_YEARLY, ilDateList\get(), IL_CAL_FKT_DATE, IL_CAL_UNIX, initDateList(), and ilDateTime\WEEK.

Referenced by calculateDateList().

{
if($this->recurrence->getFrequenceType() != ilCalendarRecurrence::FREQ_YEARLY)
{
return $list;
}
// return unmodified, if no byweekno rules are available
if(!$this->recurrence->getBYWEEKNOList())
{
return $list;
}
$weeks_list = $this->initDateList();
foreach($list->get() as $seed)
{
$weeks_in_year = date('W',mktime(0,0,0,12,28,$seed->get(IL_CAL_FKT_DATE,'Y',$this->timezone)));
$this->log->write(__METHOD__.': Year '.$seed->get(IL_CAL_FKT_DATE,'Y',$this->timezone).' has '.$weeks_in_year.' weeks');
foreach($this->recurrence->getBYWEEKNOList() as $week_no)
{
$week_no = $week_no < 0 ? ($weeks_in_year + $week_no + 1) : $week_no;
switch($this->frequence_context)
{
case ilCalendarRecurrence::FREQ_MONTHLY:
$this->log->write(__METHOD__.': Handling BYWEEKNO in MONTHLY context');
// Check if week matches
if($seed->get(IL_CAL_FKT_DATE,'W',$this->timezone) == $week_no)
{
$weeks_list->add($seed);
}
break;
case ilCalendarRecurrence::FREQ_YEARLY:
$this->log->write(__METHOD__.': Handling BYWEEKNO in YEARLY context');
$week_diff = $week_no - $seed->get(IL_CAL_FKT_DATE,'W',$this->timezone);
// TODO: think about tz here
$new_week = $this->createDate($seed->get(IL_CAL_UNIX,'',$this->timezone));
$new_week->increment(ilDateTime::WEEK,$week_diff);
$weeks_list->add($new_week);
break;
}
}
}
$this->frequence_context = ilCalendarRecurrence::FREQ_WEEKLY;
return $weeks_list;
}

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ilCalendarRecurrenceCalculator::applyBYYEARDAYRules ( ilDateList  $list)
protected

Apply BYYEARDAY rules.

protected

Definition at line 383 of file class.ilCalendarRecurrenceCalculator.php.

References createDate(), ilDateTime\DAY, ilCalendarRecurrence\FREQ_DAILY, ilCalendarRecurrence\FREQ_MONTHLY, ilCalendarRecurrence\FREQ_WEEKLY, ilCalendarRecurrence\FREQ_YEARLY, ilDateList\get(), IL_CAL_FKT_DATE, IL_CAL_UNIX, and initDateList().

Referenced by calculateDateList().

{
// return unmodified, if no byweekno rules are available
if(!$this->recurrence->getBYYEARDAYList())
{
return $list;
}
$days_list = $this->initDateList();
foreach($list->get() as $seed)
{
$num_days = date('z',mktime(0,0,0,12,31,$seed->get(IL_CAL_FKT_DATE,'Y',$this->timezone)));
$this->log->write(__METHOD__.': Year '.$seed->get(IL_CAL_FKT_DATE,'Y',$this->timezone).' has '.$num_days.' days.');
foreach($this->recurrence->getBYYEARDAYList() as $day_no)
{
$day_no = $day_no < 0 ? ($num_days + $day_no + 1) : $day_no;
$day_diff = $day_no - $seed->get(IL_CAL_FKT_DATE,'z',$this->timezone);
$new_day = $this->createDate($seed->get(IL_CAL_UNIX,'',$this->timezone));
$new_day->increment(ilDateTime::DAY,$day_diff);
switch($this->frequence_context)
{
case ilCalendarRecurrence::FREQ_DAILY:
// Check if day matches
if($seed->get(IL_CAL_FKT_DATE,'z',$this->timezone) == $day_no)
{
$days_list->add($new_day);
}
break;
case ilCalendarRecurrence::FREQ_WEEKLY:
// Check if week matches
if($seed->get(IL_CAL_FKT_DATE,'W',$this->timezone) == $new_day->get(IL_CAL_FKT_DATE,'W',$this->timezone))
{
$days_list->add($new_day);
}
break;
case ilCalendarRecurrence::FREQ_MONTHLY:
// Check if month matches
if($seed->get(IL_CAL_FKT_DATE,'n',$this->timezone) == $new_day->get(IL_CAL_FKT_DATE,'n',$this->timezone))
{
$days_list->add($new_day);
}
break;
case ilCalendarRecurrence::FREQ_YEARLY:
// Simply add
$day_list->add($new_day);
break;
}
}
}
$this->frequence_context = ilCalendarRecurrence::FREQ_DAILY;
return $days_list;
}

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ilCalendarRecurrenceCalculator::applyLimits ( ilDateList  $list)
protected

Apply limits (count or until)

protected

Parameters
objectilDateList

Definition at line 774 of file class.ilCalendarRecurrenceCalculator.php.

References $res, ilDateTime\_after(), ilDateTime\_before(), elseif(), ilDateList\get(), IL_CAL_DAY, ilDateList\remove(), and ilDateList\sort().

Referenced by calculateDateList().

{
$list->sort();
// Check valid dates before starting time
foreach($list->get() as $check_date)
{
if(ilDateTime::_before($check_date,$this->event->getStart(),IL_CAL_DAY))
{
$list->remove($check_date);
}
}
// Check count if given
if($this->recurrence->getFrequenceUntilCount())
{
foreach($list->get() as $res)
{
// check smaller than since the start time counts as one
if(count($this->valid_dates->get()) < $this->recurrence->getFrequenceUntilCount())
{
$this->valid_dates->add($res);
}
else
{
$this->limit_reached = true;
return false;
}
}
return true;
}
elseif($this->recurrence->getFrequenceUntilDate())
{
$date = $this->recurrence->getFrequenceUntilDate();
foreach($list->get() as $res)
{
if(ilDateTime::_after($res,$date))
{
$this->limit_reached = true;
return false;
}
$this->valid_dates->add($res);
}
return true;
}
$this->valid_dates->merge($list);
return true;
}

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ilCalendarRecurrenceCalculator::calculateDateList ( ilDateTime  $a_start,
ilDateTime  $a_end,
  $a_limit = -1 
)

calculate date list

public

Parameters
objectilDateTime start of period
objectilDateTime end of period
intlimit number of returned dates
Returns
object ilDateList

Definition at line 94 of file class.ilCalendarRecurrenceCalculator.php.

References $period_end, $period_start, $start, $valid_dates, ilDateTime\_after(), ilDateTime\_before(), ilDateTime\_equals(), ilTimeZone\_restoreDefaultTimeZone(), adjustTimeZones(), applyBYDAYRules(), applyBYMONTHDAYRules(), applyBYMONTHRules(), applyBYSETPOSRules(), applyBYWEEKNORules(), applyBYYEARDAYRules(), applyLimits(), IL_CAL_DAY, incrementByFrequency(), initDateList(), optimizeStartingTime(), and validateRecurrence().

Referenced by ilObjSessionGUI\createRecurringSessions().

{
$this->valid_dates = $this->initDateList();
// Check invalid settings: e.g no frequence given, invalid start/end dates ...
if(!$this->validateRecurrence())
{
$this->valid_dates->add($this->event->getStart());
return $this->valid_dates;
}
// Performance fix: Switching the timezone for many dates seems to be
// quite time consuming.
// Therfore we adjust the timezone of all input dates (start,end, event start)
// to the same tz (UTC for fullday events, Recurrence tz for all others).
$this->adjustTimeZones($a_start,$a_end);
// Add start of event if it is in the period
if((ilDateTime::_after($this->event->getStart(),$this->period_start,IL_CAL_DAY) and
ilDateTime::_before($this->event->getStart(),$this->period_end,IL_CAL_DAY)) or
ilDateTime::_equals($this->event->getStart(),$this->period_start,IL_CAL_DAY))
{
$this->valid_dates->add($this->event->getStart());
}
// Calculate recurrences based on frequency (e.g. MONTHLY)
$time = microtime(true);
$start = $this->optimizeStartingTime();
#echo "ZEIT: ADJUST: ".(microtime(true) - $time).'<br>';
$counter = 0;
do
{
++$counter;
// initialize context for applied rules
// E.g
// RRULE:FREQ=YEARLY;BYMONTH=1;BYWEEKNO=1,50 => context for BYWERKNO is monthly because it filters to the weeks in JAN
// RRULE:FREQ=YEARLY;BYWEEKNO=1,50 => context for BYWERKNO is yearly because it adds all weeks.
$this->frequence_context = $this->recurrence->getFrequenceType();
$freq_res = $this->initDateList();
$freq_res->add($start);
// Fixed sequence of applying rules (RFC 2445 4.3.10)
$freq_res = $this->applyBYMONTHRules($freq_res);
#echo "BYMONTH: ".$freq_res;
$freq_res = $this->applyBYWEEKNORules($freq_res);
#echo "BYWEEKNO: ".$freq_res;
$freq_res = $this->applyBYYEARDAYRules($freq_res);
#echo "BYYEARDAY: ".$freq_res;
$freq_res = $this->applyBYMONTHDAYRules($freq_res);
#echo "BYMONTHDAY: ".$freq_res;
#$time = microtime(true);
$freq_res = $this->applyBYDAYRules($freq_res);
#echo "ZEIT: ".(microtime(true) - $time);
#echo "BYDAY: ".$freq_res;
$freq_res = $this->applyBYSETPOSRules($freq_res);
#echo "BYSETPOS: ".$freq_res;
$freq_res = $this->applyLimits($freq_res);
$start = $this->incrementByFrequency($start);
if(ilDateTime::_after($start,$this->period_end) or $this->limit_reached)
{
break;
}
}
while(true);
$this->valid_dates->sort();
// Restore default timezone
ilTimeZone::_restoreDefaultTimeZone();
return $this->valid_dates;
}

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ilCalendarRecurrenceCalculator::calculateDateListByMonth (   $a_month,
  $a_year 
)

calculate day list by month(s) uses a cache of calculated recurring events public

Parameters
intmonth
intyear
Returns
object ilDateList

Definition at line 79 of file class.ilCalendarRecurrenceCalculator.php.

{
}
ilCalendarRecurrenceCalculator::createDate (   $a_date,
  $a_format_type = IL_CAL_UNIX 
)
protected

create date

protected

Definition at line 839 of file class.ilCalendarRecurrenceCalculator.php.

Referenced by applyBYDAYRules(), applyBYMONTHDAYRules(), applyBYMONTHRules(), applyBYWEEKNORules(), applyBYYEARDAYRules(), and optimizeStartingTime().

{
if($this->event->isFullday())
{
return new ilDate($a_date,$a_format_type);
}
else
{
// TODO: the timezone for this recurrence must be stored in the db
return new ilDateTime($a_date,$a_format_type,$this->timezone);
}
}

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ilCalendarRecurrenceCalculator::getMonthWeekDays (   $year,
  $month 
)
protected

get a list of month days

protected

Parameters
@return

Definition at line 685 of file class.ilCalendarRecurrenceCalculator.php.

References ilCalendarUtil\_getMaxDayOfMonth(), IL_CAL_DATE, and IL_CAL_FKT_GETDATE.

Referenced by applyBYDAYRules().

{
static $month_days = array();
if(isset($month_days[$year][$month]))
{
return $month_days[$year][$month];
}
$month_str = $month < 10 ? ('0'.$month) : $month;
$begin_month = new ilDate($year.'-'.$month_str.'-01',IL_CAL_DATE);
$begin_month_info = $begin_month->get(IL_CAL_FKT_GETDATE);
$days = array(0 => 'SU',1 => 'MO',2 => 'TU',3 => 'WE',4 => 'TH',5 => 'FR',6 => 'SA');
for($i = 0;$i < $begin_month_info['wday'];$i++)
{
next($days);
}
for($i = $begin_month_info['yday']; $i < $begin_month_info['yday'] + ilCalendarUtil::_getMaxDayOfMonth($year,$month) ; $i++)
{
if(($current_day = current($days)) == false)
{
$current_day = reset($days);
}
$month_days[$year][$month][$current_day][] = $i;
next($days);
}
return $month_days[$year][$month];
}

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ilCalendarRecurrenceCalculator::getWeekWeekDays (   $seed_info)
protected

get weedays of week

protected

Parameters
@return

Definition at line 722 of file class.ilCalendarRecurrenceCalculator.php.

Referenced by applyBYDAYRules().

{
$days = array(0 => 'SU',1 => 'MO',2 => 'TU',3 => 'WE',4 => 'TH',5 => 'FR',6 => 'SA');
$start_day = $seed_info['yday'] - $seed_info['wday'];
foreach($days as $num => $day)
{
$week_days[$day][] = $start_day++;
}
return $week_days;
}

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ilCalendarRecurrenceCalculator::getYearWeekDays ( ilDateTime  $seed)
protected

get a list of year week days according to the BYMONTH rule

protected

Definition at line 650 of file class.ilCalendarRecurrenceCalculator.php.

References $start, ilCalendarUtil\_isLeapYear(), ilDateTime\get(), IL_CAL_DATE, and IL_CAL_FKT_DATE.

Referenced by applyBYDAYRules().

{
$time = microtime(true);
$year_days = array();
$current_year = $seed->get(IL_CAL_FKT_DATE,'Y');
$start = new ilDate($current_year.'-01-01',IL_CAL_DATE);
$offset = $start->get(IL_CAL_FKT_DATE,'w');
$days = array(0 => 'SU',1 => 'MO',2 => 'TU',3 => 'WE',4 => 'TH',5 => 'FR',6 => 'SA');
for($i = 0;$i < $offset;$i++)
{
next($days);
}
$num_days = ilCalendarUtil::_isLeapYear($current_year) ? 366 : 365;
for($i = 0;$i < $num_days;$i++)
{
if(($current_day = current($days)) == false)
{
$current_day = reset($days);
}
$year_days[$current_day][] = $i;
next($days);
}
return $year_days;
}

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ilCalendarRecurrenceCalculator::incrementByFrequency (   $start)
protected

increment starting time by frequency

protected

Definition at line 249 of file class.ilCalendarRecurrenceCalculator.php.

References $ilLog, $start, ilDateTime\DAY, ilCalendarRecurrence\FREQ_DAILY, ilCalendarRecurrence\FREQ_MONTHLY, ilCalendarRecurrence\FREQ_WEEKLY, ilCalendarRecurrence\FREQ_YEARLY, ilDateTime\MONTH, ilDateTime\WEEK, and ilDateTime\YEAR.

Referenced by calculateDateList(), and optimizeStartingTime().

{
global $ilLog;
switch($this->recurrence->getFrequenceType())
{
case ilCalendarRecurrence::FREQ_YEARLY:
$start->increment(ilDateTime::YEAR,$this->recurrence->getInterval());
break;
case ilCalendarRecurrence::FREQ_MONTHLY:
$start->increment(ilDateTime::MONTH,$this->recurrence->getInterval());
break;
case ilCalendarRecurrence::FREQ_WEEKLY:
$start->increment(ilDateTime::WEEK,$this->recurrence->getInterval());
break;
case ilCalendarRecurrence::FREQ_DAILY:
$start->increment(ilDateTime::DAY,$this->recurrence->getInterval());
break;
default:
$ilLog->write(__METHOD__.'No frequence defined.');
break;
}
return $start;
}

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ilCalendarRecurrenceCalculator::initDateList ( )
protected

init date list

protected

Definition at line 829 of file class.ilCalendarRecurrenceCalculator.php.

References ilDateList\TYPE_DATE, and ilDateList\TYPE_DATETIME.

Referenced by applyBYDAYRules(), applyBYMONTHDAYRules(), applyBYMONTHRules(), applyBYSETPOSRules(), applyBYWEEKNORules(), applyBYYEARDAYRules(), and calculateDateList().

{
return new ilDateList($this->event->isFullday() ? ilDateList::TYPE_DATE : ilDateList::TYPE_DATETIME);
}

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ilCalendarRecurrenceCalculator::optimizeStartingTime ( )
protected

optimize starting time

protected

Definition at line 223 of file class.ilCalendarRecurrenceCalculator.php.

References $start, ilDateTime\_before(), createDate(), IL_CAL_UNIX, and incrementByFrequency().

Referenced by calculateDateList().

{
$time = microtime(true);
// starting time cannot be optimzed if RRULE UNTIL is given.
// In that case we have to calculate all dates until "UNTIL" is reached.
if($this->recurrence->getFrequenceUntilCount() > 0)
{
// Switch the date to the original defined timzone for this recurrence
return $this->createDate($this->start->get(IL_CAL_UNIX,$this->timezone));
}
$optimized = $start = $this->createDate($this->start->get(IL_CAL_UNIX,$this->timezone));
while(ilDateTime::_before($start,$this->period_start))
{
$optimized = clone $start;
$start = $this->incrementByFrequency($start);
}
return $optimized;
}

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ilCalendarRecurrenceCalculator::validateRecurrence ( )
protected

validate recurrence

protected

Returns
bool

Definition at line 858 of file class.ilCalendarRecurrenceCalculator.php.

Referenced by calculateDateList().

{
return $this->recurrence->validate();
}

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Field Documentation

ilCalendarRecurrenceCalculator::$event = null
protected

Definition at line 50 of file class.ilCalendarRecurrenceCalculator.php.

ilCalendarRecurrenceCalculator::$frequence_context = 0
protected

Definition at line 53 of file class.ilCalendarRecurrenceCalculator.php.

ilCalendarRecurrenceCalculator::$limit_reached = false
protected

Definition at line 44 of file class.ilCalendarRecurrenceCalculator.php.

ilCalendarRecurrenceCalculator::$log = null
protected

Definition at line 42 of file class.ilCalendarRecurrenceCalculator.php.

ilCalendarRecurrenceCalculator::$period_end = null
protected

Definition at line 47 of file class.ilCalendarRecurrenceCalculator.php.

Referenced by calculateDateList().

ilCalendarRecurrenceCalculator::$period_start = null
protected

Definition at line 46 of file class.ilCalendarRecurrenceCalculator.php.

Referenced by calculateDateList().

ilCalendarRecurrenceCalculator::$recurrence = null
protected

Definition at line 51 of file class.ilCalendarRecurrenceCalculator.php.

ilCalendarRecurrenceCalculator::$start = null
protected

Definition at line 48 of file class.ilCalendarRecurrenceCalculator.php.

Referenced by applyBYDAYRules(), calculateDateList(), getYearWeekDays(), incrementByFrequency(), and optimizeStartingTime().

ilCalendarRecurrenceCalculator::$timezone = null
protected

Definition at line 41 of file class.ilCalendarRecurrenceCalculator.php.

ilCalendarRecurrenceCalculator::$valid_dates = null
protected

Definition at line 45 of file class.ilCalendarRecurrenceCalculator.php.

Referenced by calculateDateList().

The documentation for this class was generated from the following file: