CCalendar::getSectionListForContext

static function getSectionListForContext(array $params = []): array
{
	$userId = isset($params['userId']) ? (int)$params['userId'] : self::getCurUserId();
	$sections = [];
	$followedSectionList = UserSettings::getFollowedSectionIdList($userId);
	$hiddenSections = UserSettings::getHiddenSections($userId);

	self::$userMeetingSection = self::GetCurUserMeetingSection();

	$sectionList = self::GetSectionList(
		[
			'ADDITIONAL_IDS' => $followedSectionList,
			'checkPermissions' => true,
			'getPermissions' => true,
			'getImages' => true,
		]
	);

	$sectionList = array_merge($sectionList, self::getSectionListAvailableForUser($userId));

	$sectionIdList = [];
	foreach ($sectionList as $i => $section)
	{
		if (!in_array((int)$section['ID'], $sectionIdList))
		{
			$sections[] = $section;
			$sectionIdList[] = (int)$section['ID'];
		}
	}

	$readOnly = !self::$perm['edit'] && !self::$perm['section_edit'];

	if (self::$type === 'user' && self::$ownerId != self::$userId)
		$readOnly = true;

	if (self::$bAnonym)
		$readOnly = true;

	$bCreateDefault = !self::$bAnonym;

	if (self::$type === 'user')
	{
		$bCreateDefault = self::$ownerId == self::$userId;
	}

	$additionalMeetingsId = [];
	$groupOrUser = self::$type === 'user' || self::$type === 'group';
	if ($groupOrUser)
	{
		$noEditAccessedCalendars = true;
	}

	$trackingUsers = [];
	$trackingGroups = [];

	foreach ($sections as $i => $section)
	{
		$sections[$i]['~IS_MEETING_FOR_OWNER'] = $section['CAL_TYPE'] === 'user' && $section['OWNER_ID'] !== self::$userId && self::GetMeetingSection($section['OWNER_ID']) === $section['ID'];

		if (!in_array($section['ID'], $hiddenSections, true) && $section['ACTIVE'] !== 'N')
		{
			// It's superposed calendar of the other user and it's need to show user's meetings
			if ($sections[$i]['~IS_MEETING_FOR_OWNER'])
			{
				$additionalMeetingsId[] = array('ID' => $section['OWNER_ID'], 'SECTION_ID' => $section['ID']);
			}
		}

		// We check access only for main sections because we can't edit superposed section
		if ($groupOrUser && $sections[$i]['CAL_TYPE'] == self::$type &&
			$sections[$i]['OWNER_ID'] == self::$ownerId)
		{
			if ($noEditAccessedCalendars && $section['PERM']['edit'])
				$noEditAccessedCalendars = false;

			if ($readOnly && ($section['PERM']['edit'] || $section['PERM']['edit_section']) && !self::$isArchivedGroup)
				$readOnly = false;
		}

		if (in_array($section['ID'], $followedSectionList))
		{
			$sections[$i]['SUPERPOSED'] = true;
		}

		if ($bCreateDefault && $section['CAL_TYPE'] == self::$type && $section['OWNER_ID'] == self::$ownerId)
		{
			$bCreateDefault = false;
		}

		if ($sections[$i]['SUPERPOSED'])
		{
			$type = $sections[$i]['CAL_TYPE'];
			if ($type === 'user')
			{
				$path = self::$pathesForSite['path_to_user_calendar'];
				$path = CComponentEngine::MakePathFromTemplate($path, array("user_id" => $sections[$i]['OWNER_ID']));
				$trackingUsers[] = $sections[$i]['OWNER_ID'];
			}
			elseif($type === 'group')
			{
				$path = self::$pathesForSite['path_to_group_calendar'];
				$path = CComponentEngine::MakePathFromTemplate($path, array("group_id" => $sections[$i]['OWNER_ID']));
				$trackingGroups[] = $sections[$i]['OWNER_ID'];
			}
			else
			{
				$path = self::$pathesForSite['path_to_type_'.$type];
			}
			$sections[$i]['LINK'] = $path;
		}
	}

	if ($groupOrUser && $noEditAccessedCalendars && !$bCreateDefault)
	{
		$readOnly = true;
	}

	self::$readOnly = $readOnly;

	return $sections;
}