ThemePicker::setLastUsage

private function setLastUsage($themeId, $autoPrepend = true)
{
	/** @var array $themesUsage */
	$themesUsage = CUserOptions::getOption(
		"intranet",
		$this->getLastThemesOptionName(),
		[],
		$this->getUserId()
	);

	foreach ($themesUsage as $index => $id)
	{
		if ($themeId === $id)
		{
			array_splice($themesUsage, $index, 1);
			break;
		}
	}

	if ($autoPrepend)
	{
		array_unshift($themesUsage, $themeId);
	}

	CUserOptions::setOption("intranet", $this->getLastThemesOptionName(), $themesUsage, false, $this->getUserId());
}