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Edit File: time_period.php

<?php
/*
 * Copyright (c) 2022 LatePoint LLC. All rights reserved.
 */

namespace LatePoint\Misc;

class TimePeriod {
	public int $start_time = 0;
	public int $end_time   = 0;

function __construct( $args = [] ) {
		$allowed_props = self::allowed_props();
		foreach ( $args as $key => $arg ) {
			if ( in_array( $key, $allowed_props ) ) {
				$this->$key = $arg;
			}
		}
	}

public static function merge_periods( array $time_periods ): array {
		if ( ! $time_periods ) {
			return [];
		}

$result = [ $time_periods[0] ];

for ( $i = 0; $i < count( $time_periods ); $i++ ) {
			$x1 = $time_periods[ $i ]->start_time;
			$y1 = $time_periods[ $i ]->end_time;
			$x2 = $result[ count( $result ) - 1 ]->start_time;
			$y2 = $result[ count( $result ) - 1 ]->end_time;

if ( $y2 >= $x1 ) {
				$result[ count( $result ) - 1 ]->end_time = max( $y1, $y2 );
			} else {
				$result[] = new TimePeriod(
					[
						'start_time' => $x1,
						'end_time'   => $y1,
					] 
				);
			}
		}
		return $result;
	}

public static function create_from_work_period( WorkPeriod $work_period ) {
		return new TimePeriod(
			[
				'start_time' => $work_period->start_time,
				'end_time'   => $work_period->end_time,
			] 
		);
	}

/**
	 * @param array $overlapped_time_periods
	 * @return TimePeriod
	 */
	public static function get_unified_period_from_overlapped_periods( array $overlapped_time_periods ): TimePeriod {
		$bounds = [];
		foreach ( $overlapped_time_periods as $time_period ) {
			$bounds[] = $time_period->start_time;
			$bounds[] = $time_period->end_time;
		}
		return new TimePeriod(
			[
				'start_time' => min( $bounds ),
				'end_time'   => max( $bounds ),
			] 
		);
	}

public function check_if_overlaps( TimePeriod $check_time_period ) {
		return ( ( $this->start_time < $check_time_period->end_time ) && ( $check_time_period->start_time < $this->end_time ) );
	}

public static function allowed_props(): array {
		return [
			'start_time',
			'end_time',
		];
	}
}

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