Site::checkLimitByTemplates

static function checkLimitByTemplates(array $filter, int $limit): bool
{
	$sites = [];
	$currentSiteId = null;
	$currentSiteTemplate = null;

	if (isset($filter['!ID']))
	{
		$currentSiteId = $filter['!ID'];
	}

	// get all sites (active) and group by templates
	$res = BitrixLandingSite::getList([
		'select' => [
			'ID', 'XML_ID', 'TPL_CODE'
		],
		'filter' => $filter
	]);
	while ($row = $res->fetch())
	{
		$sites[] = $row;
	}

	// current site
	if ($currentSiteId)
	{
		$res = BitrixLandingSite::getList([
			'select' => [
				'ID', 'XML_ID', 'TPL_CODE'
			],
			'filter' => [
				'CHECK_PERMISSIONS' => 'N',
				'ID' => $currentSiteId
			]
		]);
		if ($row = $res->fetch())
		{
			$sites[] = $row;
		}
	}

	// calc templates
	$templates = [];
	$templatesCount = 0;
	$templatesLimits = self::LIMIT_BY_TEMPLATES_MINIMAL;
	// $templatesLimits['%'] = max($limit, 1);
	$limit = max($limit, 1);
	foreach ($sites as $row)
	{
		if (!$row['TPL_CODE'])
		{
			if (mb_strpos($row['XML_ID'], '|') !== false)
			{
				[, $row['TPL_CODE']] = explode('|', $row['XML_ID']);
			}
		}

		// store-chat-dark === store-chat-light === store-chat
		foreach ($templatesLimits as $code => $cnt)
		{
			if (strpos($row['TPL_CODE'], $code) === 0)
			{
				$row['TPL_CODE'] = $code;
				break;
			}
		}

		if ($currentSiteId && $currentSiteId === $row['ID'])
		{
			$currentSiteTemplate = $row['TPL_CODE'];
		}

		if (!($templates[$row['TPL_CODE']] ?? null))
		{
			$templates[$row['TPL_CODE']] = 0;
		}
		$templates[$row['TPL_CODE']]++;

		if (!in_array($row['TPL_CODE'], self::OVER_LIMIT_TEMPLATES, true))
		{
			$templatesCount++;
		}
	}

	// special limit for store v3
	if (
		$currentSiteTemplate
		&& $currentSiteTemplate === self::NEW_STORE_CODE
		&& self::isNew2021Tariff()
	)
	{
		CBitrixComponent::includeComponentClass('bitrix:landing.site_master');
		$optionName = LandingSiteMasterComponent::getShopInstallCountOptionName($currentSiteTemplate);
		if ((int)Manager::getOption($optionName, 0) <= 1)
		{
			$limit++;
		}
	}

	// calc limits
	if (
		$currentSiteTemplate
		&& in_array($row['TPL_CODE'], self::OVER_LIMIT_TEMPLATES, true)
	)
	{
		return true;
	}

	if ($templates)
	{
		foreach ($templatesLimits as $code => $templateLimit)
		{
			if (
				$templates[$code]
				&& $templates[$code] > $templateLimit
			)
			{
				return false;
			}
		}
	}

	if ($limit < $templatesCount)
	{
		return false;
	}

	return true;
}