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<?php
/**
Copyright 2011-2014 Nick Korbel
This file is part of Booked Scheduler.
Booked Scheduler is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Booked Scheduler is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Booked Scheduler. If not, see <http://www.gnu.org/licenses/>.
*/
require_once(ROOT_DIR . 'Domain/Values/DayOfWeek.php');
interface ILayoutTimezone
{
public function Timezone();
}
interface IDailyScheduleLayout
{
/**
* @return bool
*/
public function UsesDailyLayouts();
}
interface IScheduleLayout extends ILayoutTimezone, IDailyScheduleLayout
{
/**
* @param Date $layoutDate
* @param bool $hideBlockedPeriods
* @return SchedulePeriod[]|array of SchedulePeriod objects
*/
public function GetLayout(Date $layoutDate, $hideBlockedPeriods = false);
/**
* @abstract
* @param Date $date
* @return SchedulePeriod|null period which occurs at this datetime. Includes start time, excludes end time. null if no match is found
*/
public function GetPeriod(Date $date);
}
interface ILayoutCreation extends ILayoutTimezone, IDailyScheduleLayout
{
/**
* Appends a period to the schedule layout
*
* @param Time $startTime starting time of the schedule in specified timezone
* @param Time $endTime ending time of the schedule in specified timezone
* @param string $label optional label for the period
* @param DayOfWeek|int|null $dayOfWeek
*/
function AppendPeriod(Time $startTime, Time $endTime, $label = null, $dayOfWeek = null);
/**
* Appends a period that is not reservable to the schedule layout
*
* @param Time $startTime starting time of the schedule in specified timezone
* @param Time $endTime ending time of the schedule in specified timezone
* @param string $label optional label for the period
* @param DayOfWeek|int|null $dayOfWeek
* @return void
*/
function AppendBlockedPeriod(Time $startTime, Time $endTime, $label = null, $dayOfWeek = null);
/**
*
* @param DayOfWeek|int|null $dayOfWeek
* @return LayoutPeriod[] array of LayoutPeriod
*/
function GetSlots($dayOfWeek = null);
}
class ScheduleLayout implements IScheduleLayout, ILayoutCreation
{
/**
* @var array|LayoutPeriod[]
*/
private $_periods = array();
/**
* @var string
*/
private $targetTimezone;
/**
* @var bool
*/
private $cached = false;
private $cachedPeriods = array();
/**
* @var bool
*/
private $usingDailyLayouts = false;
/**
* @var string
*/
private $layoutTimezone;
/**
* @param string $targetTimezone target timezone of layout
*/
public function __construct($targetTimezone = null)
{
$this->targetTimezone = $targetTimezone;
if ($targetTimezone == null)
{
$this->targetTimezone = Configuration::Instance()->GetDefaultTimezone();
}
}
/**
* @param DayOfWeek|int|null $dayOfWeek
* @throws Exception
* @return LayoutPeriod[]|array
*/
public function GetSlots($dayOfWeek = null)
{
if (is_null($dayOfWeek))
{
if ($this->usingDailyLayouts)
{
throw new Exception('ScheduleLayout->GetSlots() $dayOfWeek required when using daily layouts');
}
$periods = $this->_periods;
}
else
{
if (!$this->usingDailyLayouts)
{
throw new Exception('ScheduleLayout->GetSlots() $dayOfWeek cannot be provided when using single layout');
}
$periods = $this->_periods[$dayOfWeek];
}
$this->SortItems($periods);
return $periods;
}
/**
* Appends a period to the schedule layout
*
* @param Time $startTime starting time of the schedule in specified timezone
* @param Time $endTime ending time of the schedule in specified timezone
* @param string $label optional label for the period
* @param DayOfWeek|int|null $dayOfWeek
*/
public function AppendPeriod(Time $startTime, Time $endTime, $label = null, $dayOfWeek = null)
{
$this->AppendGenericPeriod($startTime, $endTime, PeriodTypes::RESERVABLE, $label, $dayOfWeek);
}
/**
* Appends a period that is not reservable to the schedule layout
*
* @param Time $startTime starting time of the schedule in specified timezone
* @param Time $endTime ending time of the schedule in specified timezone
* @param string $label optional label for the period
* @param DayOfWeek|int|null $dayOfWeek
* @return void
*/
public function AppendBlockedPeriod(Time $startTime, Time $endTime, $label = null, $dayOfWeek = null)
{
$this->AppendGenericPeriod($startTime, $endTime, PeriodTypes::NONRESERVABLE, $label, $dayOfWeek);
}
protected function AppendGenericPeriod(Time $startTime, Time $endTime, $periodType, $label = null,
$dayOfWeek = null)
{
$this->layoutTimezone = $startTime->Timezone();
$layoutPeriod = new LayoutPeriod($startTime, $endTime, $periodType, $label);
if (!is_null($dayOfWeek))
{
$this->usingDailyLayouts = true;
$this->_periods[$dayOfWeek][] = $layoutPeriod;
}
else
{
$this->_periods[] = $layoutPeriod;
}
}
/**
* @param Date $start
* @param Date $end
* @return bool
*/
protected function SpansMidnight(Date $start, Date $end)
{
return !$start->DateEquals($end) && !$end->IsMidnight();
}
/**
* @param Date $layoutDate
* @param bool $hideBlockedPeriods
* @return array|SchedulePeriod[]
*/
public function GetLayout(Date $layoutDate, $hideBlockedPeriods = false)
{
if ($this->usingDailyLayouts)
{
return $this->GetLayoutDaily($layoutDate, $hideBlockedPeriods);
}
$targetTimezone = $this->targetTimezone;
$layoutDate = $layoutDate->ToTimezone($targetTimezone);
$cachedValues = $this->GetCachedValuesForDate($layoutDate);
if (!empty($cachedValues))
{
return $cachedValues;
}
$list = new PeriodList();
$periods = $this->getPeriods($layoutDate);
if (count($periods) <= 0)
{
throw new Exception(sprintf('No periods defined for date %s', $layoutDate));
}
$layoutTimezone = $periods[0]->Timezone();
$workingDate = Date::Create($layoutDate->Year(), $layoutDate->Month(), $layoutDate->Day(), 0, 0, 0,
$layoutTimezone);
$midnight = $layoutDate->GetDate();
/* @var $period LayoutPeriod */
foreach ($periods as $period)
{
if ($hideBlockedPeriods && !$period->IsReservable())
{
continue;
}
$start = $period->Start;
$end = $period->End;
$periodType = $period->PeriodTypeClass();
$label = $period->Label;
$labelEnd = null;
// convert to target timezone
$periodStart = $workingDate->SetTime($start)->ToTimezone($targetTimezone);
$periodEnd = $workingDate->SetTime($end, true)->ToTimezone($targetTimezone);
if ($periodEnd->LessThan($periodStart))
{
$periodEnd = $periodEnd->AddDays(1);
}
$startTime = $periodStart->GetTime();
$endTime = $periodEnd->GetTime();
if ($this->BothDatesAreOff($periodStart, $periodEnd, $layoutDate))
{
$periodStart = $layoutDate->SetTime($startTime);
$periodEnd = $layoutDate->SetTime($endTime, true);
}
if ($this->SpansMidnight($periodStart, $periodEnd, $layoutDate))
{
if ($periodStart->LessThan($midnight))
{
// add compensating period at end
$start = $layoutDate->SetTime($startTime);
$end = $periodEnd->AddDays(1);
$list->Add($this->BuildPeriod($periodType, $start, $end, $label, $labelEnd));
}
else
{
// add compensating period at start
$start = $periodStart->AddDays(-1);
$end = $layoutDate->SetTime($endTime, true);
$list->Add($this->BuildPeriod($periodType, $start, $end, $label, $labelEnd));
}
}
if (!$periodStart->IsMidnight() && $periodStart->LessThan($layoutDate) && $periodEnd->DateEquals($layoutDate) && $periodEnd->IsMidnight())
{
$periodStart = $periodStart->AddDays(1);
$periodEnd = $periodEnd->AddDays(1);
}
$list->Add($this->BuildPeriod($periodType, $periodStart, $periodEnd, $label, $labelEnd));
}
$layout = $list->GetItems();
$this->SortItems($layout);
$this->AddCached($layout, $workingDate);
return $layout;
}
private function GetLayoutDaily(Date $requestedDate, $hideBlockedPeriods = false)
{
if ($requestedDate->Timezone() != $this->targetTimezone)
{
throw new Exception('Target timezone and requested timezone do not match');
}
$cachedValues = $this->GetCachedValuesForDate($requestedDate);
if (!empty($cachedValues))
{
return $cachedValues;
}
// check cache
$baseDateInLayoutTz = Date::Create($requestedDate->Year(), $requestedDate->Month(), $requestedDate->Day(),
0, 0, 0, $this->layoutTimezone);
$list = new PeriodList();
$this->AddDailyPeriods($requestedDate->Weekday(), $baseDateInLayoutTz, $requestedDate, $list, $hideBlockedPeriods);
if ($this->layoutTimezone != $this->targetTimezone)
{
$requestedDateInTargetTz = $requestedDate->ToTimezone($this->layoutTimezone);
$adjustment = 0;
if ($requestedDateInTargetTz->Format('YmdH') < $requestedDate->Format('YmdH'))
{
$adjustment = -1;
}
else
{
if ($requestedDateInTargetTz->Format('YmdH') > $requestedDate->Format('YmdH'))
{
$adjustment = 1;
}
}
if ($adjustment != 0)
{
$adjustedDate = $requestedDate->AddDays($adjustment);
$baseDateInLayoutTz = $baseDateInLayoutTz->AddDays($adjustment);
$this->AddDailyPeriods($adjustedDate->Weekday(), $baseDateInLayoutTz, $requestedDate, $list);
}
}
$layout = $list->GetItems();
$this->SortItems($layout);
$this->AddCached($layout, $requestedDate);
return $layout;
}
/**
* @param int $day
* @param Date $baseDateInLayoutTz
* @param Date $requestedDate
* @param PeriodList $list
* @param bool $hideBlockedPeriods
*/
private function AddDailyPeriods($day, $baseDateInLayoutTz, $requestedDate, $list, $hideBlockedPeriods = false)
{
$periods = $this->_periods[$day];
/** @var $period LayoutPeriod */
foreach ($periods as $period)
{
if ($hideBlockedPeriods && !$period->IsReservable())
{
continue;
}
$begin = $baseDateInLayoutTz->SetTime($period->Start)->ToTimezone($this->targetTimezone);
$end = $baseDateInLayoutTz->SetTime($period->End, true)->ToTimezone($this->targetTimezone);
// only add this period if it occurs on the requested date
if ($begin->DateEquals($requestedDate) || ($end->DateEquals($requestedDate) && !$end->IsMidnight()))
{
$built = $this->BuildPeriod($period->PeriodTypeClass(), $begin, $end, $period->Label);
$list->Add($built);
}
}
}
/**
* @param array|SchedulePeriod[] $layout
* @param Date $date
*/
private function AddCached($layout, $date)
{
$this->cached = true;
$this->cachedPeriods[$date->Format('Ymd')] = $layout;
}
/**
* @param Date $date
* @return array|SchedulePeriod[]
*/
private function GetCachedValuesForDate($date)
{
$key = $date->Format('Ymd');
if (array_key_exists($date->Format('Ymd'), $this->cachedPeriods))
{
return $this->cachedPeriods[$key];
}
return null;
}
private function BothDatesAreOff(Date $start, Date $end, Date $layoutDate)
{
return !$start->DateEquals($layoutDate) && !$end->DateEquals($layoutDate);
}
private function BuildPeriod($periodType, Date $start, Date $end, $label, $labelEnd = null)
{
return new $periodType($start, $end, $label, $labelEnd);
}
protected function SortItems(&$items)
{
usort($items, array("ScheduleLayout", "SortBeginTimes"));
}
public function Timezone()
{
return $this->targetTimezone;
}
protected function AddPeriod(SchedulePeriod $period)
{
$this->_periods[] = $period;
}
/**
* @static
* @param SchedulePeriod|LayoutPeriod $period1
* @param SchedulePeriod|LayoutPeriod $period2
* @return int
*/
static function SortBeginTimes($period1, $period2)
{
return $period1->Compare($period2);
}
/**
* @param string $timezone
* @param string $reservableSlots
* @param string $blockedSlots
* @return ScheduleLayout
*/
public static function Parse($timezone, $reservableSlots, $blockedSlots)
{
$parser = new LayoutParser($timezone);
$parser->AddReservable($reservableSlots);
$parser->AddBlocked($blockedSlots);
return $parser->GetLayout();
}
/**
* @param string $timezone
* @param string[]|array $reservableSlots
* @param string[]|array $blockedSlots
* @throws Exception
* @return ScheduleLayout
*/
public static function ParseDaily($timezone, $reservableSlots, $blockedSlots)
{
if (count($reservableSlots) != DayOfWeek::NumberOfDays || count($blockedSlots) != DayOfWeek::NumberOfDays)
{
throw new Exception(sprintf('LayoutParser ParseDaily missing slots. $reservableSlots=%s, $blockedSlots=%s',
count($reservableSlots), count($blockedSlots)));
}
$parser = new LayoutParser($timezone);
foreach (DayOfWeek::Days() as $day)
{
$parser->AddReservable($reservableSlots[$day], $day);
$parser->AddBlocked($blockedSlots[$day], $day);
}
return $parser->GetLayout();
}
/**
* @param Date $date
* @return SchedulePeriod period which occurs at this datetime. Includes start time, excludes end time
*/
public function GetPeriod(Date $date)
{
$timezone = $this->layoutTimezone;
$tempDate = $date->ToTimezone($timezone);
$periods = $this->getPeriods($tempDate);
/** @var $period LayoutPeriod */
foreach ($periods as $period)
{
$start = Date::Create($tempDate->Year(), $tempDate->Month(), $tempDate->Day(), $period->Start->Hour(),
$period->Start->Minute(), 0, $timezone);
$end = Date::Create($tempDate->Year(), $tempDate->Month(), $tempDate->Day(), $period->End->Hour(),
$period->End->Minute(), 0, $timezone);
if ($end->LessThan($start) || $end->IsMidnight())
{
$end = $end->AddDays(1);
}
if ($start->Compare($date) <= 0 && $end->Compare($date) > 0)
{
return $this->BuildPeriod($period->PeriodTypeClass(), $start, $end, $period->Label);
}
}
return null;
}
/**
* @return bool
*/
public function UsesDailyLayouts()
{
return $this->usingDailyLayouts;
}
private function getPeriods(Date $layoutDate)
{
if ($this->usingDailyLayouts)
{
$dayOfWeek = $layoutDate->Weekday();
return $this->_periods[$dayOfWeek];
}
else
{
return $this->_periods;
}
}
}
class LayoutParser
{
private $layout;
private $timezone;
public function __construct($timezone)
{
$this->layout = new ScheduleLayout($timezone);
$this->timezone = $timezone;
}
public function AddReservable($reservableSlots, $dayOfWeek = null)
{
$cb = array($this, 'appendPeriod');
$this->ParseSlots($reservableSlots, $dayOfWeek, $cb);
}
public function AddBlocked($blockedSlots, $dayOfWeek = null)
{
$cb = array($this, 'appendBlocked');
$this->ParseSlots($blockedSlots, $dayOfWeek, $cb);
}
public function GetLayout()
{
return $this->layout;
}
private function appendPeriod($start, $end, $label, $dayOfWeek = null)
{
$this->layout->AppendPeriod(Time::Parse($start, $this->timezone),
Time::Parse($end, $this->timezone),
$label,
$dayOfWeek);
}
private function appendBlocked($start, $end, $label, $dayOfWeek = null)
{
$this->layout->AppendBlockedPeriod(Time::Parse($start, $this->timezone),
Time::Parse($end, $this->timezone),
$label,
$dayOfWeek);
}
private function ParseSlots($allSlots, $dayOfWeek, $callback)
{
$lines = preg_split("/[\n]/", $allSlots, -1, PREG_SPLIT_NO_EMPTY);
foreach ($lines as $slotLine)
{
$label = null;
$parts = preg_split('/(\d?\d:\d\d\s*\-\s*\d?\d:\d\d)(.*)/', trim($slotLine), -1,
PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
$times = explode('-', $parts[0]);
$start = trim($times[0]);
$end = trim($times[1]);
if (count($parts) > 1)
{
$label = trim($parts[1]);
}
call_user_func($callback, $start, $end, $label, $dayOfWeek);
}
}
}
class LayoutPeriod
{
/**
* @var Time
*/
public $Start;
/**
* @var Time
*/
public $End;
/**
* @var PeriodTypes
*/
public $PeriodType;
/**
* @var string
*/
public $Label;
/**
* @return string
*/
public function PeriodTypeClass()
{
if ($this->PeriodType == PeriodTypes::RESERVABLE)
{
return 'SchedulePeriod';
}
return 'NonSchedulePeriod';
}
/**
* @return bool
*/
public function IsReservable()
{
return $this->PeriodType == PeriodTypes::RESERVABLE;
}
/**
* @return bool
*/
public function IsLabelled()
{
return !empty($this->Label);
}
/**
* @return string
*/
public function Timezone()
{
return $this->Start->Timezone();
}
public function __construct(Time $start, Time $end, $periodType = PeriodTypes::RESERVABLE, $label = null)
{
$this->Start = $start;
$this->End = $end;
$this->PeriodType = $periodType;
$this->Label = $label;
}
/**
* Compares the starting times
*/
public function Compare(LayoutPeriod $other)
{
return $this->Start->Compare($other->Start);
}
}
class PeriodList
{
private $items = array();
private $_addedStarts = array();
private $_addedTimes = array();
private $_addedEnds = array();
public function Add(SchedulePeriod $period)
{
if ($this->AlreadyAdded($period->BeginDate(), $period->EndDate()))
{
return;
}
$this->items[] = $period;
}
public function GetItems()
{
return $this->items;
}
private function AlreadyAdded(Date $start, Date $end)
{
$startExists = false;
$endExists = false;
if (array_key_exists($start->Timestamp(), $this->_addedStarts))
{
$startExists = true;
}
if (array_key_exists($end->Timestamp(), $this->_addedEnds))
{
$endExists = true;
}
$this->_addedTimes[$start->Timestamp()] = true;
$this->_addedEnds[$end->Timestamp()] = true;
return $startExists || $endExists;
}
}
class ReservationLayout extends ScheduleLayout implements IScheduleLayout
{
protected function SpansMidnight(Date $start, Date $end)
{
return false;
}
}
?>