CallActivityGraph::getActiveHoursByWorktime

private function getActiveHoursByWorktime($workTimeFrom, $workTimeTo): array
{
	$activeHours = [];
	for ($i = 1; $i <= 24; $i++)
	{
		$hour = [
			'id' => $i,
			'name' => $i
		];

		if ($i === 0 || $i === 24 || ($i) % 6 === 0)
		{
			$hour['show'] = true;
		}

		if (($workTimeFrom < $workTimeTo) && ($i > $workTimeFrom && $i <= $workTimeTo))
		{
			$hour['active'] = true;
		}
		elseif (($workTimeFrom > $workTimeTo) && !($i <= $workTimeFrom && $i > $workTimeTo))
		{
			//If after converting time zones, the start time is later than the end.
			$hour['active'] = true;
		}

		$activeHours[] = $hour;
	}

	if (fmod($workTimeFrom, 1) != 0)
	{
		$firstHourIndex = (int)$workTimeFrom;
		$activeHours[$firstHourIndex]['active'] = true;
		$activeHours[$firstHourIndex]['firstHalf'] = true;
	}

	if (fmod($workTimeTo, 1) != 0)
	{
		$lastHourIndex = (int)$workTimeTo;
		$activeHours[$lastHourIndex]['active'] = true;
		$activeHours[$lastHourIndex]['lastHalf'] = true;
	}

	if (fmod($workTimeTo, 1) >= 0.31)
	{
		$hour['active'] = true;
		unset($activeHours[$lastHourIndex]['firstHalf'], $activeHours[$lastHourIndex]['lastHalf']);
	}

	return $activeHours;
}