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<?php |
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declare(strict_types=1); |
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namespace hiqdev\php\billing\action; |
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use DateInterval; |
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use DateTimeImmutable; |
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use InvalidArgumentException; |
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/** @readonly */ |
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final class UsageInterval |
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{ |
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/** @readonly */ |
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private DateTimeImmutable $start; |
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/** @readonly */ |
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private DateTimeImmutable $end; |
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/** @readonly */ |
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private DateTimeImmutable $month; |
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private function __construct( |
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DateTimeImmutable $start, |
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DateTimeImmutable $end |
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) { |
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$this->start = $start; |
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$this->end = $end; |
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$this->month = self::toMonth($start); |
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} |
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private static function toMonth(DateTimeImmutable $date): DateTimeImmutable |
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{ |
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return $date->modify('first day of this month midnight'); |
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} |
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public static function wholeMonth(DateTimeImmutable $time): self |
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{ |
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$start = self::toMonth($time); |
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return new self( |
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$start, |
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$start->modify('+1 month'), |
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); |
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} |
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/** |
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* Calculates the usage interval for the given month for the given start and end sale dates. |
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* |
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* @param DateTimeImmutable $month the month to calculate the usage interval for |
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* @param DateTimeImmutable $start the start date of the sale |
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* @param DateTimeImmutable|null $end the end date of the sale or null if the sale is active |
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* @return static |
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*/ |
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public static function withinMonth( |
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DateTimeImmutable $month, |
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DateTimeImmutable $start, |
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?DateTimeImmutable $end |
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): self { |
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$month = self::toMonth($month); |
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$nextMonth = $month->modify('+1 month'); |
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if ($end !== null && $start > $end) { |
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throw new InvalidArgumentException('Start date must be less than end date'); |
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} |
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if ($start >= $nextMonth) { |
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$start = $month; |
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$end = $month; |
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} |
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if ($end !== null && $end < $month) { |
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$start = $month; |
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$end = $month; |
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} |
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$effectiveSince = max($start, $month); |
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$effectiveTill = min( |
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$end ?? new DateTimeImmutable('2999-01-01'), |
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$month->modify('+1 month') |
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); |
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return new self( |
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$effectiveSince, |
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$effectiveTill, |
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); |
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} |
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public function start(): DateTimeImmutable |
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{ |
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return $this->start; |
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} |
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public function end(): DateTimeImmutable |
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{ |
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return $this->end; |
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} |
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public function dateTimeInterval(): DateInterval |
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{ |
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return $this->start->diff($this->end); |
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} |
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public function seconds(): int |
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{ |
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$interval = $this->dateTimeInterval(); |
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return $interval->s |
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+ $interval->i * 60 |
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+ $interval->h * 3600 |
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+ $interval->days * 86400; |
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} |
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public function minutes(): float |
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{ |
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return $this->seconds() / 60; |
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} |
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public function hours(): float |
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{ |
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return $this->seconds() / 60 / 60; |
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} |
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public function secondsInMonth(): int |
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{ |
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return $this->month->format('t') * 86400; |
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} |
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public function ratioOfMonth(): float |
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{ |
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$usageSeconds = $this->seconds(); |
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$secondsInCurrentMonth = $this->secondsInMonth(); |
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return $usageSeconds / $secondsInCurrentMonth; |
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} |
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} |
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hiqdev /
php-billing
