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<?php |
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/** |
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* @file |
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* Class IntervalValuator |
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*/ |
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namespace Roomify\Bat\Valuator; |
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use Roomify\Bat\Calendar\Calendar; |
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use Roomify\Bat\Store\Store; |
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use Roomify\Bat\Valuator\AbstractValuator; |
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use Roomify\Bat\Unit\Unit; |
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use Roomify\Bat\Event\EventInterval; |
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/** |
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* The IntervalValuator sums the aggregate value of an event by dividing time |
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* in discreet intervals and then assigning value to those |
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* intervals based on the value the unit has during that interval. |
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* |
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* For example, if we are dealing with a hotel room and want to calculate nightly rates |
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* we can set the date interval to P1D. We will query the calendar for events whose value |
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* represents prices over that period and the split the time in 1-day intervals and sum up |
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* accordingly. |
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* |
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* If we are selling activities at 15m intervals we can set the interval at PT15M and we would |
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* be splitting events on 15m intervals and would assign the value of each interval to the value |
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* of the event during that interval. |
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*/ |
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class IntervalValuator extends AbstractValuator { |
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/** |
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* @var \DateInterval |
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*/ |
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protected $duration_unit; |
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/** |
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* @param \DateTime $start_date |
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* @param \DateTime $end_date |
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* @param Unit $unit |
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* @param Store $store |
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* @param \DateInterval $duration_unit |
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*/ |
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public function __construct(\DateTime $start_date, \DateTime $end_date, Unit $unit, Store $store, \DateInterval $duration_unit) { |
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parent::__construct($start_date, $end_date, $unit, $store); |
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$this->duration_unit = $duration_unit; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function determineValue() { |
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$value = 0; |
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// Instantiate a calendar |
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$calendar = new Calendar(array($this->unit), $this->store); |
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$events = $calendar->getEvents($this->start_date, $this->end_date); |
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foreach ($events as $unit => $unit_events) { |
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if ($unit == $this->unit->getUnitId()) { |
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foreach ($unit_events as $event) { |
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$percentage = EventInterval::divide($event->getStartDate(), $event->getEndDate(), $this->duration_unit); |
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$value = $value + $event->getValue() * $percentage; |
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} |
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} |
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} |
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return round($value, 2); |
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} |
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} |
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Roomify /
bat
