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<?php
/**
Copyright 2011-2014 Nick Korbel
This file is part of Booked SchedulerBooked SchedulereIt 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 versBooked SchedulerduleIt 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
alBooked SchedulercheduleIt. If not, see <http://www.gnu.org/licenses/>.
*/
class DateRange
{
/**
* @var Date
*/
private $_begin;
/**
* @var Date
*/
private $_end;
/**
* @var string
*/
private $_timezone;
/**
* @param Date $begin
* @param Date $end
* @param string $timezone
*/
public function __construct(Date $begin, Date $end, $timezone = null)
{
$this->_begin = $begin;
$this->_end = $end;
if (empty($timezone))
{
$this->_timezone = $begin->Timezone();
}
else
{
$this->_timezone = $timezone;
}
}
/**
* @param string $beginString
* @param string $endString
* @param string $timezoneString
* @return DateRange
*/
public static function Create($beginString, $endString, $timezoneString)
{
return new DateRange(Date::Parse($beginString, $timezoneString), Date::Parse($endString, $timezoneString), $timezoneString);
}
/**
* Whether or not the $date is within the range. Range boundaries are inclusive
* @param Date $date
* @return bool
*/
public function Contains(Date $date)
{
return $this->_begin->Compare($date) <= 0 && $this->_end->Compare($date) >= 0;
}
/**
* @param DateRange $dateRange
* @return bool
*/
public function ContainsRange(DateRange $dateRange)
{
return $this->_begin->Compare($dateRange->_begin) <= 0 && $this->_end->Compare($dateRange->_end) >= 0;
}
/**
* Whether or not the date ranges overlap. Dates that start or end on boundaries are excluded
* @param DateRange $dateRange
* @return bool
*/
public function Overlaps(DateRange $dateRange)
{
return ($this->Contains($dateRange->GetBegin()) || $this->Contains($dateRange->GetEnd()) ||
$dateRange->Contains($this->GetBegin()) || $dateRange->Contains($this->GetEnd())) &&
(!$this->GetBegin()->Equals($dateRange->GetEnd()) && !$this->GetEnd()->Equals($dateRange->GetBegin()));
}
/**
* Whether or not any date within this range occurs on the provided date
* @param Date $date
* @return bool
*/
public function OccursOn(Date $date)
{
$timezone = $date->Timezone();
$compare = $this;
if ($timezone != $this->_timezone)
{
$compare = $this->ToTimezone($timezone);
}
$beginMidnight = $compare->GetBegin();
if ($this->GetEnd()->IsMidnight())
{
$endMidnight = $compare->GetEnd();
}
else
{
$endMidnight = $compare->GetEnd()->AddDays(1);
}
return ($beginMidnight->DateCompare($date) <= 0 &&
$endMidnight->DateCompare($date) > 0);
}
/**
* @return Date
*/
public function GetBegin()
{
return $this->_begin;
}
/**
* @return Date
*/
public function GetEnd()
{
return $this->_end;
}
/**
* @return array[int]Date
*/
public function Dates()
{
$current = $this->_begin->GetDate();
$end = $this->_end->GetDate();
$dates = array($current);
for($day = 0; $current->Compare($end) < 0; $day++)
{
$current = $current->AddDays(1);
$dates[] = $current;
}
return $dates;
}
/**
* @param DateRange $otherRange
* @return bool
*/
public function Equals(DateRange $otherRange)
{
return $this->_begin->Equals($otherRange->GetBegin()) && $this->_end->Equals($otherRange->GetEnd());
}
/**
* @param string $timezone
* @return DateRange
*/
public function ToTimezone($timezone)
{
return new DateRange($this->_begin->ToTimezone($timezone), $this->_end->ToTimezone($timezone));
}
/**
* @return DateRange
*/
public function ToUtc()
{
return new DateRange($this->_begin->ToUtc(), $this->_end->ToUtc());
}
/**
* @param int $days
* @return DateRange
*/
public function AddDays($days)
{
return new DateRange($this->_begin->AddDays($days), $this->_end->AddDays($days));
}
/**
* @return string
*/
public function ToString()
{
return "\nBegin: " . $this->_begin->ToString() . " End: " . $this->_end->ToString() . "\n";
}
public function __toString()
{
return $this->ToString();
}
}
class NullDateRange extends DateRange
{
protected static $instance;
public function __construct()
{
parent::__construct(Date::Now(), Date::Now());
}
/**
* @return NullDateRange
*/
public static function Instance()
{
if(self::$instance == null)
{
self::$instance = new NullDateRange();
}
return self::$instance;
}
}
?>