Навигация по материалам | К2 2.8.0 - Joomla 3.8.8 - K2

function getPreviousItem($id, $catid, $ordering)
	{
		$application = JFactory::getApplication();
		$user = JFactory::getUser();
		$id = (int)$id;
		$catid = (int)$catid;
		$ordering = (int)$ordering;
		$db = JFactory::getDbo();

		$jnow = JFactory::getDate();
		$now = K2_JVERSION == '15' ? $jnow->toMySQL() : $jnow->toSql();
		$nullDate = $db->getNullDate();

		if (K2_JVERSION != '15')
		{
			$accessCondition = ' AND access IN('.implode(',', $user->getAuthorisedViewLevels()).')';
		}
		else
		{
			$accessCondition = ' AND access <= '.$user->aid; ;
		}

		$languageCondition = '';
		if (K2_JVERSION != '15')
		{
			if ($application->getLanguageFilter())
			{
				$languageCondition = "AND language IN (".$db->quote(JFactory::getLanguage()->getTag()).",".$db->quote('*').")";
			}
		}

		if ($ordering == "0")
		{
			$query = "SELECT * FROM #__k2_items WHERE id < {$id} AND catid={$catid} AND published=1 AND ( publish_up = ".$db->Quote($nullDate)." OR publish_up <= ".$db->Quote($now)." ) AND ( publish_down = ".$db->Quote($nullDate)." OR publish_down >= ".$db->Quote($now)." ) {$accessCondition} AND trash=0 {$languageCondition} ORDER BY ordering DESC";
		}
		else
		{
			$query = "SELECT * FROM #__k2_items WHERE id != {$id} AND catid={$catid} AND ordering < {$ordering} AND published=1 AND ( publish_up = ".$db->Quote($nullDate)." OR publish_up <= ".$db->Quote($now)." ) AND ( publish_down = ".$db->Quote($nullDate)." OR publish_down >= ".$db->Quote($now)." ) {$accessCondition} AND trash=0 {$languageCondition} ORDER BY ordering DESC";
		}

		$db->setQuery($query, 0, 1);
		$row = $db->loadObject();
		return $row;
	}

$previousItem = $model->getPreviousItem($item->id, $item->catid, $item->ordering);
			if (!is_null($previousItem))
			{
				$item->previousLink = urldecode(JRoute::_(K2HelperRoute::getItemRoute($previousItem->id.':'.urlencode($previousItem->alias), $previousItem->catid.':'.urlencode($item->category->alias))));
				$item->previousTitle = $previousItem->title;

				$date = JFactory::getDate($item->modified);
				$timestamp = '?t='.$date->toUnix();

				if (JFile::exists(JPATH_SITE.'/media/k2/items/cache/'.md5("Image".$previousItem->id).'_XS.jpg'))
				{
					$item->previousImageXSmall = JURI::base(true).'/media/k2/items/cache/'.md5("Image".$previousItem->id).'_XS.jpg'.$timestamp;

				}
				if (JFile::exists(JPATH_SITE.'/media/k2/items/cache/'.md5("Image".$previousItem->id).'_S.jpg'))
				{
					$item->previousImageSmall = JURI::base(true).'/media/k2/items/cache/'.md5("Image".$previousItem->id).'_S.jpg'.$timestamp;
				}

				if (JFile::exists(JPATH_SITE.'/media/k2/items/cache/'.md5("Image".$previousItem->id).'_M.jpg'))
				{
					$item->previousImageMedium = JURI::base(true).'/media/k2/items/cache/'.md5("Image".$previousItem->id).'_M.jpg'.$timestamp;
				}

				if (JFile::exists(JPATH_SITE.'/media/k2/items/cache/'.md5("Image".$previousItem->id).'_L.jpg'))
				{
					$item->previousImageLarge = JURI::base(true).'/media/k2/items/cache/'.md5("Image".$previousItem->id).'_L.jpg'.$timestamp;
				}

				if (JFile::exists(JPATH_SITE.'/media/k2/items/cache/'.md5("Image".$previousItem->id).'_XL.jpg'))
				{
					$item->previousImageXLarge = JURI::base(true).'/media/k2/items/cache/'.md5("Image".$previousItem->id).'_XL.jpg'.$timestamp;
				}

				if (JFile::exists(JPATH_SITE.'/media/k2/items/cache/'.md5("Image".$previousItem->id).'_Generic.jpg'))
				{
					$item->previousImageGeneric = JURI::base(true).'/media/k2/items/cache/'.md5("Image".$previousItem->id).'_Generic.jpg'.$timestamp;
				}
			}