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<?php |
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/** |
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* GpsLab component. |
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* |
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* @author Peter Gribanov <[email protected]> |
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* @copyright Copyright (c) 2016, Peter Gribanov |
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* @license http://opensource.org/licenses/MIT |
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*/ |
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namespace GpsLab\Component\Interval; |
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/** |
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* The comparator must be used only in intervals for safe use the data types. |
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*/ |
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class IntervalComparator |
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{ |
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/** |
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* @var ComparableIntervalInterface |
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*/ |
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private $interval; |
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/** |
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* @param ComparableIntervalInterface $interval |
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*/ |
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public function __construct(ComparableIntervalInterface $interval) |
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{ |
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$this->interval = $interval; |
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} |
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/** |
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* @param ComparableIntervalInterface $interval |
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* |
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* @return bool |
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*/ |
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public function equal(ComparableIntervalInterface $interval) |
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{ |
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return ( |
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$this->interval->startPoint()->eq($interval->startPoint()) && |
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$this->interval->endPoint()->eq($interval->endPoint()) && |
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$this->interval->type()->equal($interval->type()) |
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); |
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} |
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/** |
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* @param IntervalPointInterface $point |
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* |
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* @return bool |
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*/ |
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public function contains(IntervalPointInterface $point) |
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{ |
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if ($this->interval->startPoint()->eq($point)) { |
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return !$this->interval->type()->startExcluded(); |
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} |
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if ($this->interval->endPoint()->eq($point)) { |
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return !$this->interval->type()->endExcluded(); |
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} |
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return $this->interval->startPoint()->lt($point) && $this->interval->endPoint()->gt($point); |
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} |
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/** |
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* @param ComparableIntervalInterface $interval |
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* @param bool $check_interval_type |
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* |
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* @return bool |
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*/ |
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public function intersects(ComparableIntervalInterface $interval, $check_interval_type = true) |
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{ |
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if ( |
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$this->interval->startPoint()->gt($interval->endPoint()) || |
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$this->interval->endPoint()->lt($interval->startPoint()) |
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) { |
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return false; |
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} |
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if ($check_interval_type) { |
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if ($this->interval->startPoint()->eq($interval->endPoint())) { |
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return !$this->interval->type()->startExcluded() && !$interval->type()->endExcluded(); |
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} |
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if ($this->interval->endPoint()->eq($interval->startPoint())) { |
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return !$this->interval->type()->endExcluded() && !$interval->type()->startExcluded(); |
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} |
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} |
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return true; |
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} |
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/** |
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* @param ComparableIntervalInterface $interval |
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* |
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* @return ComparableIntervalInterface|null |
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*/ |
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public function intersection(ComparableIntervalInterface $interval) |
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{ |
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// intervals is not intersect or impossible create interval from one point |
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if ( |
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$this->interval->startPoint()->gte($interval->endPoint()) || |
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$this->interval->endPoint()->lte($interval->startPoint()) |
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) { |
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// ignore closed intervals: |
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// [a, b] | [b, c] = [b, b] |
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return null; |
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} |
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$type = IntervalType::TYPE_CLOSED; |
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if ($this->interval->startPoint()->lt($interval->startPoint())) { |
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$start = $interval->startPoint(); |
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if ($interval->type()->startExcluded()) { |
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$type |= IntervalType::TYPE_START_EXCLUDED; |
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} |
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} else { |
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$start = $this->interval->startPoint(); |
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if ($this->interval->type()->startExcluded()) { |
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$type |= IntervalType::TYPE_START_EXCLUDED; |
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} |
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} |
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if ($this->interval->endPoint()->gt($interval->endPoint())) { |
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$end = $interval->endPoint(); |
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if ($interval->type()->endExcluded()) { |
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$type |= IntervalType::TYPE_END_EXCLUDED; |
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} |
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} else { |
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$end = $this->interval->endPoint(); |
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if ($this->interval->type()->endExcluded()) { |
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$type |= IntervalType::TYPE_END_EXCLUDED; |
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} |
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} |
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return $this->interval |
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->withStart($start) |
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->withEnd($end) |
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->withType(IntervalType::create($type)); |
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} |
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/** |
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* The point is before the interval. |
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* |
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* @param IntervalPointInterface $point |
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* |
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* @return bool |
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*/ |
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public function before(IntervalPointInterface $point) |
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{ |
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return $this->interval->startPoint()->gt($point); |
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} |
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/** |
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* The point is after the interval. |
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* |
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* @param IntervalPointInterface $point |
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* |
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* @return bool |
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*/ |
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public function after(IntervalPointInterface $point) |
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{ |
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return $this->interval->endPoint()->lt($point); |
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} |
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} |
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gpslab /
interval
