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<?php
/**
* This file is part of the Carbon package.
*
* (c) Brian Nesbitt <brian@nesbot.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Carbon\Traits;
use Carbon\Carbon;
use Carbon\CarbonImmutable;
use Carbon\CarbonInterface;
use Closure;
use DateTimeImmutable;
use DateTimeInterface;
trait IntervalStep
{
/**
* Step to apply instead of a fixed interval to get the new date.
*
* @var Closure|null
*/
protected $step;
/**
* Get the dynamic step in use.
*
* @return Closure
*/
public function getStep(): ?Closure
{
return $this->step;
}
/**
* Set a step to apply instead of a fixed interval to get the new date.
*
* Or pass null to switch to fixed interval.
*
* @param Closure|null $step
*/
public function setStep(?Closure $step): void
{
$this->step = $step;
}
/**
* Take a date and apply either the step if set, or the current interval else.
*
* The interval/step is applied negatively (typically subtraction instead of addition) if $negated is true.
*
* @param DateTimeInterface $dateTime
* @param bool $negated
*
* @return CarbonInterface
*/
public function convertDate(DateTimeInterface $dateTime, bool $negated = false): CarbonInterface
{
/** @var CarbonInterface $carbonDate */
$carbonDate = $dateTime instanceof CarbonInterface ? $dateTime : $this->resolveCarbon($dateTime);
if ($this->step) {
return $carbonDate->setDateTimeFrom(($this->step)($carbonDate->avoidMutation(), $negated));
}
if ($negated) {
return $carbonDate->rawSub($this);
}
return $carbonDate->rawAdd($this);
}
/**
* Convert DateTimeImmutable instance to CarbonImmutable instance and DateTime instance to Carbon instance.
*
* @param DateTimeInterface $dateTime
*
* @return Carbon|CarbonImmutable
*/
private function resolveCarbon(DateTimeInterface $dateTime)
{
if ($dateTime instanceof DateTimeImmutable) {
return CarbonImmutable::instance($dateTime);
}
return Carbon::instance($dateTime);
}
}
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