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<?php |
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/** |
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* League.Period (https://period.thephpleague.com) |
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* |
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* (c) Ignace Nyamagana Butera <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace League\Period; |
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use ArrayAccess; |
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use Countable; |
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use Iterator; |
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use IteratorAggregate; |
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use JsonSerializable; |
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use function array_filter; |
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use function array_merge; |
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use function array_splice; |
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use function array_unshift; |
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use function array_values; |
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use function count; |
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use function reset; |
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use function sort; |
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use function sprintf; |
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use function uasort; |
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use function usort; |
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use const ARRAY_FILTER_USE_BOTH; |
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/** |
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* A class to manipulate interval collection. |
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* |
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* @package League.period |
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* @author Ignace Nyamagana Butera <[email protected]> |
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* @since 4.1.0 |
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*/ |
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final class Sequence implements ArrayAccess, Countable, IteratorAggregate, JsonSerializable |
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{ |
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/** |
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* @var Period[] |
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*/ |
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private $intervals = []; |
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/** |
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* new instance. |
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* |
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* @param Period ...$intervals |
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*/ |
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public function __construct(Period ...$intervals) |
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{ |
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$this->intervals = $intervals; |
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} |
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/** |
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* Returns the sequence boundaries as a Period instance. |
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* |
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* If the sequence contains no interval null is returned. |
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* |
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* @return ?Period |
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*/ |
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public function boundaries(): ?Period |
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{ |
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$period = reset($this->intervals); |
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if (false === $period) { |
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return null; |
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} |
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return $period->merge(...$this->intervals); |
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} |
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/** |
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* Returns the gaps inside the instance. |
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*/ |
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public function gaps(): self |
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{ |
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$sequence = new self(); |
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$interval = null; |
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foreach ($this->sorted([$this, 'sortByStartDate']) as $period) { |
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if (null === $interval) { |
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$interval = $period; |
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continue; |
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} |
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if (!$interval->overlaps($period) && !$interval->abuts($period)) { |
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$sequence->push($interval->gap($period)); |
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} |
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if (!$interval->contains($period)) { |
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$interval = $period; |
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} |
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} |
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return $sequence; |
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} |
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/** |
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* Sorts two Interval instance using their start datepoint. |
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*/ |
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private function sortByStartDate(Period $interval1, Period $interval2): int |
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{ |
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return $interval1->getStartDate() <=> $interval2->getStartDate(); |
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} |
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/** |
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* Returns the intersections inside the instance. |
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*/ |
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public function intersections(): self |
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{ |
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$sequence = new self(); |
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$current = null; |
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$isPreviouslyContained = false; |
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foreach ($this->sorted([$this, 'sortByStartDate']) as $period) { |
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if (null === $current) { |
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$current = $period; |
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continue; |
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} |
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$isContained = $current->contains($period); |
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if ($isContained && $isPreviouslyContained) { |
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$sequence->push($current->intersect($period)); |
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continue; |
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} |
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if ($current->overlaps($period)) { |
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$sequence->push($current->intersect($period)); |
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} |
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$isPreviouslyContained = $isContained; |
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if (!$isContained) { |
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$current = $period; |
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} |
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} |
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return $sequence; |
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} |
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/** |
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* Returns the unions inside the instance. |
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*/ |
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public function unions(): self |
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{ |
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$sequence = $this |
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->sorted([$this, 'sortByStartDate']) |
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->reduce([$this, 'calculateUnion'], new self()) |
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; |
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if ($sequence->intervals === $this->intervals) { |
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return $this; |
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} |
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return $sequence; |
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} |
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/** |
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* Iteratively calculate the union sequence. |
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*/ |
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private function calculateUnion(Sequence $sequence, Period $period): Sequence |
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{ |
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if ($sequence->isEmpty()) { |
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$sequence->push($period); |
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return $sequence; |
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} |
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$index = $sequence->count() - 1; |
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$interval = $sequence->get($index); |
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if ($interval->overlaps($period) || $interval->abuts($period)) { |
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$sequence->set($index, $interval->merge($period)); |
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return $sequence; |
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} |
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$sequence->push($period); |
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return $sequence; |
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} |
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/** |
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* DEPRECATION WARNING! This method will be removed in the next major point release. |
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* |
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* @deprecated since version 4.9.0 |
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* @see ::subtract |
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*/ |
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public function substract(Sequence $sequence): self |
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{ |
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return $this->subtract($sequence); |
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} |
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/** |
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* Subtract a Sequence from the current instance. |
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* |
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* This method MUST retain the state of the current instance, and return |
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* an instance that contains subtracted intervals. |
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*/ |
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public function subtract(Sequence $sequence): self |
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{ |
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if ($this->isEmpty()) { |
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return $this; |
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} |
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$new = $sequence->reduce([$this, 'subtractOne'], $this); |
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if ($new->intervals === $this->intervals) { |
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return $this; |
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} |
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return $new; |
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} |
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/** |
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* Substract an Interval from a Sequence. |
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*/ |
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private function subtractOne(Sequence $sequence, Period $interval): self |
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{ |
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if ($sequence->isEmpty()) { |
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return $sequence; |
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} |
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$reducer = function (Sequence $sequence, Period $period) use ($interval): Sequence { |
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$subtract = $period->subtract($interval); |
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if (!$subtract->isEmpty()) { |
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$sequence->push(...$subtract); |
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} |
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return $sequence; |
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}; |
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return $sequence->reduce($reducer, new self()); |
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} |
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/** |
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* Returns the sequence boundaries as a Period instance. |
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* |
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* DEPRECATION WARNING! This method will be removed in the next major point release |
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* |
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* @deprecated deprecated since version 4.4.0 |
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* @see ::boundaries |
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* |
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* If the sequence contains no interval null is returned. |
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* |
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* @return ?Period |
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*/ |
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public function getBoundaries(): ?Period |
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{ |
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return $this->boundaries(); |
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} |
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/** |
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* Returns the intersections inside the instance. |
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* |
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* DEPRECATION WARNING! This method will be removed in the next major point release |
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* |
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* @deprecated deprecated since version 4.4.0 |
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* @see ::intersections |
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*/ |
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public function getIntersections(): self |
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{ |
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return $this->intersections(); |
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} |
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/** |
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* Returns the gaps inside the instance. |
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* |
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* DEPRECATION WARNING! This method will be removed in the next major point release |
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* |
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* @deprecated deprecated since version 4.4.0 |
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* @see ::gaps |
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*/ |
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public function getGaps(): self |
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{ |
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return $this->gaps(); |
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} |
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/** |
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* Returns the sum of all instances durations as expressed in seconds. |
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*/ |
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public function getTotalTimestampInterval(): float |
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{ |
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$retval = 0; |
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foreach ($this->intervals as $interval) { |
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$retval += $interval->getTimestampInterval(); |
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} |
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return $retval; |
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} |
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/** |
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* Tells whether some intervals in the current instance satisfies the predicate. |
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*/ |
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public function some(callable $predicate): bool |
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{ |
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foreach ($this->intervals as $offset => $interval) { |
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if (true === $predicate($interval, $offset)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Tells whether all intervals in the current instance satisfies the predicate. |
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*/ |
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public function every(callable $predicate): bool |
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{ |
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foreach ($this->intervals as $offset => $interval) { |
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if (true !== $predicate($interval, $offset)) { |
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return false; |
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} |
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} |
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return [] !== $this->intervals; |
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} |
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/** |
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* Returns the array representation of the sequence. |
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* |
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* @return Period[] |
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*/ |
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public function toArray(): array |
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{ |
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return $this->intervals; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function jsonSerialize(): array |
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{ |
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return $this->intervals; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function getIterator(): Iterator |
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{ |
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foreach ($this->intervals as $offset => $interval) { |
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yield $offset => $interval; |
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} |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function count(): int |
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{ |
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return count($this->intervals); |
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} |
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/** |
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* @inheritDoc |
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* |
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* @param mixed $offset the integer index of the Period instance to validate. |
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*/ |
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public function offsetExists($offset): bool |
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{ |
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return null !== $this->filterOffset($offset); |
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} |
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/** |
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* Filter and format the Sequence offset. |
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* |
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* This methods allows the support of negative offset |
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* |
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* if no offset is found null is returned otherwise the return type is int |
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*/ |
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private function filterOffset(int $offset): ?int |
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{ |
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if ([] === $this->intervals) { |
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return null; |
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} |
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|
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$max = count($this->intervals); |
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if (0 > $max + $offset) { |
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return null; |
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} |
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if (0 > $max - $offset - 1) { |
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return null; |
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} |
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if (0 > $offset) { |
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return $max + $offset; |
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} |
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return $offset; |
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} |
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/** |
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* @inheritDoc |
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* @see ::get |
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* |
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* @param mixed $offset the integer index of the Period instance to retrieve. |
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* |
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* @throws InvalidIndex If the offset is illegal for the current sequence |
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*/ |
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18 |
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public function offsetGet($offset): Period |
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{ |
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return $this->get($offset); |
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} |
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/** |
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* @inheritDoc |
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* @see ::remove |
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|
|
|
* |
411
|
|
|
* @param mixed $offset the integer index of the Period instance to remove |
412
|
|
|
* |
413
|
|
|
* @throws InvalidIndex If the offset is illegal for the current sequence |
414
|
|
|
*/ |
415
|
6 |
|
public function offsetUnset($offset): void |
416
|
|
|
{ |
417
|
6 |
|
$this->remove($offset); |
418
|
3 |
|
} |
419
|
|
|
|
420
|
|
|
/** |
421
|
|
|
* @inheritDoc |
422
|
|
|
* @param mixed $offset the integer index of the Period to add or update |
423
|
|
|
* @param mixed $interval the Period instance to add |
424
|
|
|
* |
425
|
|
|
* @throws InvalidIndex If the offset is illegal for the current sequence |
426
|
|
|
* |
427
|
|
|
* @see ::push |
428
|
|
|
* @see ::set |
429
|
|
|
*/ |
430
|
9 |
|
public function offsetSet($offset, $interval): void |
431
|
|
|
{ |
432
|
9 |
|
if (null !== $offset) { |
433
|
9 |
|
$this->set($offset, $interval); |
434
|
3 |
|
return; |
435
|
|
|
} |
436
|
|
|
|
437
|
3 |
|
$this->push($interval); |
438
|
3 |
|
} |
439
|
|
|
|
440
|
|
|
/** |
441
|
|
|
* Tells whether the sequence is empty. |
442
|
|
|
*/ |
443
|
30 |
|
public function isEmpty(): bool |
444
|
|
|
{ |
445
|
30 |
|
return [] === $this->intervals; |
446
|
|
|
} |
447
|
|
|
|
448
|
|
|
/** |
449
|
|
|
* Tells whether the given interval is present in the sequence. |
450
|
|
|
* |
451
|
|
|
* @param Period ...$intervals |
452
|
|
|
*/ |
453
|
6 |
|
public function contains(Period ...$intervals): bool |
454
|
|
|
{ |
455
|
6 |
|
foreach ($intervals as $period) { |
456
|
6 |
|
if (false === $this->indexOf($period)) { |
457
|
3 |
|
return false; |
458
|
|
|
} |
459
|
|
|
} |
460
|
|
|
|
461
|
6 |
|
return [] !== $intervals; |
462
|
|
|
} |
463
|
|
|
|
464
|
|
|
/** |
465
|
|
|
* Attempts to find the first offset attached to the submitted interval. |
466
|
|
|
* |
467
|
|
|
* If no offset is found the method returns boolean false. |
468
|
|
|
* |
469
|
|
|
* @return int|bool |
470
|
|
|
*/ |
471
|
6 |
|
public function indexOf(Period $interval) |
472
|
|
|
{ |
473
|
6 |
|
foreach ($this->intervals as $offset => $period) { |
474
|
6 |
|
if ($period->equals($interval)) { |
475
|
6 |
|
return $offset; |
476
|
|
|
} |
477
|
|
|
} |
478
|
|
|
|
479
|
6 |
|
return false; |
480
|
|
|
} |
481
|
|
|
|
482
|
|
|
/** |
483
|
|
|
* Returns the interval specified at a given offset. |
484
|
|
|
* |
485
|
|
|
* @throws InvalidIndex If the offset is illegal for the current sequence |
486
|
|
|
*/ |
487
|
54 |
|
public function get(int $offset): Period |
488
|
|
|
{ |
489
|
54 |
|
$index = $this->filterOffset($offset); |
490
|
54 |
|
if (null === $index) { |
491
|
6 |
|
throw new InvalidIndex(sprintf('%s is an invalid offset in the current sequence', $offset)); |
492
|
|
|
} |
493
|
|
|
|
494
|
48 |
|
return $this->intervals[$index]; |
495
|
|
|
} |
496
|
|
|
|
497
|
|
|
/** |
498
|
|
|
* Sort the current instance according to the given comparison callable |
499
|
|
|
* and maintain index association. |
500
|
|
|
* |
501
|
|
|
* Returns true on success or false on failure |
502
|
|
|
*/ |
503
|
6 |
|
public function sort(callable $compare): bool |
504
|
|
|
{ |
505
|
6 |
|
return uasort($this->intervals, $compare); |
506
|
|
|
} |
507
|
|
|
|
508
|
|
|
/** |
509
|
|
|
* Adds new intervals at the front of the sequence. |
510
|
|
|
* |
511
|
|
|
* The sequence is re-indexed after addition |
512
|
|
|
* |
513
|
|
|
* @param Period ...$intervals |
514
|
|
|
*/ |
515
|
6 |
|
public function unshift(Period ...$intervals): void |
516
|
|
|
{ |
517
|
6 |
|
$this->intervals = array_merge($intervals, $this->intervals); |
518
|
6 |
|
} |
519
|
|
|
|
520
|
|
|
/** |
521
|
|
|
* Adds new intervals at the end of the sequence. |
522
|
|
|
* |
523
|
|
|
* @param Period ...$intervals |
524
|
|
|
*/ |
525
|
33 |
|
public function push(Period ...$intervals): void |
526
|
|
|
{ |
527
|
33 |
|
$this->intervals = array_merge($this->intervals, $intervals); |
528
|
33 |
|
} |
529
|
|
|
|
530
|
|
|
/** |
531
|
|
|
* Inserts new intervals at the specified offset of the sequence. |
532
|
|
|
* |
533
|
|
|
* The sequence is re-indexed after addition |
534
|
|
|
* |
535
|
|
|
* @param Period ...$intervals |
536
|
|
|
* |
537
|
|
|
* @throws InvalidIndex If the offset is illegal for the current sequence. |
538
|
|
|
*/ |
539
|
3 |
|
public function insert(int $offset, Period $interval, Period ...$intervals): void |
540
|
|
|
{ |
541
|
3 |
|
if (0 === $offset) { |
542
|
3 |
|
$this->unshift($interval, ...$intervals); |
543
|
|
|
|
544
|
3 |
|
return; |
545
|
|
|
} |
546
|
|
|
|
547
|
3 |
|
if (count($this->intervals) === $offset) { |
548
|
3 |
|
$this->push($interval, ...$intervals); |
549
|
|
|
|
550
|
3 |
|
return; |
551
|
|
|
} |
552
|
|
|
|
553
|
3 |
|
$index = $this->filterOffset($offset); |
554
|
3 |
|
if (null === $index) { |
555
|
3 |
|
throw new InvalidIndex(sprintf('%s is an invalid offset in the current sequence', $offset)); |
556
|
|
|
} |
557
|
|
|
|
558
|
3 |
|
array_unshift($intervals, $interval); |
559
|
3 |
|
array_splice($this->intervals, $index, 0, $intervals); |
560
|
3 |
|
} |
561
|
|
|
|
562
|
|
|
/** |
563
|
|
|
* Updates the interval at the specify offset. |
564
|
|
|
* |
565
|
|
|
* @throws InvalidIndex If the offset is illegal for the current sequence. |
566
|
|
|
*/ |
567
|
12 |
|
public function set(int $offset, Period $interval): void |
568
|
|
|
{ |
569
|
12 |
|
$index = $this->filterOffset($offset); |
570
|
12 |
|
if (null === $index) { |
571
|
6 |
|
throw new InvalidIndex(sprintf('%s is an invalid offset in the current sequence', $offset)); |
572
|
|
|
} |
573
|
|
|
|
574
|
9 |
|
$this->intervals[$index] = $interval; |
575
|
9 |
|
} |
576
|
|
|
|
577
|
|
|
/** |
578
|
|
|
* Removes an interval from the sequence at the given offset and returns it. |
579
|
|
|
* |
580
|
|
|
* The sequence is re-indexed after removal |
581
|
|
|
* |
582
|
|
|
* @throws InvalidIndex If the offset is illegal for the current sequence. |
583
|
|
|
*/ |
584
|
9 |
|
public function remove(int $offset): Period |
585
|
|
|
{ |
586
|
9 |
|
$index = $this->filterOffset($offset); |
587
|
9 |
|
if (null === $index) { |
588
|
6 |
|
throw new InvalidIndex(sprintf('%s is an invalid offset in the current sequence', $offset)); |
589
|
|
|
} |
590
|
|
|
|
591
|
6 |
|
$interval = $this->intervals[$index]; |
592
|
6 |
|
unset($this->intervals[$index]); |
593
|
6 |
|
$this->intervals = array_values($this->intervals); |
594
|
|
|
|
595
|
6 |
|
return $interval; |
596
|
|
|
} |
597
|
|
|
|
598
|
|
|
/** |
599
|
|
|
* Filters the sequence according to the given predicate. |
600
|
|
|
* |
601
|
|
|
* This method MUST retain the state of the current instance, and return |
602
|
|
|
* an instance that contains the interval which validate the predicate. |
603
|
|
|
*/ |
604
|
6 |
|
public function filter(callable $predicate): self |
605
|
|
|
{ |
606
|
6 |
|
$intervals = array_filter($this->intervals, $predicate, ARRAY_FILTER_USE_BOTH); |
607
|
6 |
|
if ($intervals === $this->intervals) { |
608
|
3 |
|
return $this; |
609
|
|
|
} |
610
|
|
|
|
611
|
3 |
|
return new self(...$intervals); |
612
|
|
|
} |
613
|
|
|
|
614
|
|
|
/** |
615
|
|
|
* Removes all intervals from the sequence. |
616
|
|
|
*/ |
617
|
3 |
|
public function clear(): void |
618
|
|
|
{ |
619
|
3 |
|
$this->intervals = []; |
620
|
3 |
|
} |
621
|
|
|
|
622
|
|
|
/** |
623
|
|
|
* Returns an instance sorted according to the given comparison callable |
624
|
|
|
* but does not maintain index association. |
625
|
|
|
* |
626
|
|
|
* This method MUST retain the state of the current instance, and return |
627
|
|
|
* an instance that contains the sorted intervals. The key are re-indexed |
628
|
|
|
*/ |
629
|
24 |
|
public function sorted(callable $compare): self |
630
|
|
|
{ |
631
|
24 |
|
$intervals = $this->intervals; |
632
|
24 |
|
usort($intervals, $compare); |
633
|
24 |
|
if ($intervals === $this->intervals) { |
634
|
12 |
|
return $this; |
635
|
|
|
} |
636
|
|
|
|
637
|
15 |
|
return new self(...$intervals); |
638
|
|
|
} |
639
|
|
|
|
640
|
|
|
/** |
641
|
|
|
* Returns an instance where the given function is applied to each element in |
642
|
|
|
* the collection. The callable MUST return a Period object and takes a Period |
643
|
|
|
* and its associated key as argument. |
644
|
|
|
* |
645
|
|
|
* This method MUST retain the state of the current instance, and return |
646
|
|
|
* an instance that contains the returned intervals. |
647
|
|
|
*/ |
648
|
9 |
|
public function map(callable $func): self |
649
|
|
|
{ |
650
|
9 |
|
$intervals = []; |
651
|
9 |
|
foreach ($this->intervals as $offset => $interval) { |
652
|
9 |
|
$intervals[$offset] = $func($interval, $offset); |
653
|
|
|
} |
654
|
|
|
|
655
|
9 |
|
if ($intervals === $this->intervals) { |
656
|
3 |
|
return $this; |
657
|
|
|
} |
658
|
|
|
|
659
|
6 |
|
$mapped = new self(); |
660
|
6 |
|
$mapped->intervals = $intervals; |
661
|
|
|
|
662
|
6 |
|
return $mapped; |
663
|
|
|
} |
664
|
|
|
|
665
|
|
|
/** |
666
|
|
|
* Iteratively reduces the sequence to a single value using a callback. |
667
|
|
|
* |
668
|
|
|
* @param callable $func Accepts the carry, the current value and the current offset, and |
669
|
|
|
* returns an updated carry value. |
670
|
|
|
* |
671
|
|
|
* @param mixed|null $carry Optional initial carry value. |
672
|
|
|
* |
673
|
|
|
* @return mixed The carry value of the final iteration, or the initial |
674
|
|
|
* value if the sequence was empty. |
675
|
|
|
*/ |
676
|
21 |
|
public function reduce(callable $func, $carry = null) |
677
|
|
|
{ |
678
|
21 |
|
foreach ($this->intervals as $offset => $interval) { |
679
|
18 |
|
$carry = $func($carry, $interval, $offset); |
680
|
|
|
} |
681
|
|
|
|
682
|
21 |
|
return $carry; |
683
|
|
|
} |
684
|
|
|
} |
685
|
|
|
|