Selector::initRestrictions

protected function initRestrictions()
{
	$this->restrictions = [];
	/* all */
	$siteId = (defined('SITE_ID') ? SITE_ID : null);
	if (!empty($siteId))
	{
		$this->restrictions['all'] = ['SITE_ID' => $siteId];
		$this->restrictions['iblock'] = $this->restrictions['all'];
		$this->restrictions['socialnetwork'] = $this->restrictions['all'];
	}
	/* iblock */
	$iblockId = (string)Manager::getOption('source_iblocks');
	if ($iblockId !== '')
	{
		$iblockId = explode(',', $iblockId);
	}
	else
	{
		$iblockId = [
			HookPageSettings::getDataForSite()['IBLOCK_ID']
		];
	}
	$this->restrictions['iblock']['IBLOCK_ID'] = $iblockId;
}