Landing::getElementListData

public function getElementListData()
{
	$this->seo->clear();
	$needPreviewPicture = false;
	$needPreviewText = false;
	$needLink = true;//always

	// select
	$select = $this->getPreparedSelectFields();
	if (empty($select))
	{
		return [];
	}

	// filter
	$filter = $this->getInternalFilter();
	$contextFilter = $this->getOptionsValue('context_filter');
	$cache = $this->getOptionsValue('cache');
	if (empty($filter))
	{
		$filter = [];
	}
	if (isset($contextFilter['SITE_ID']))
	{
		$filter['SITE_ID'] = $contextFilter['SITE_ID'];
	}
	if (isset($contextFilter['LANDING_ACTIVE']))
	{
		$filter['=ACTIVE'] = $contextFilter['LANDING_ACTIVE'];
	}
	$filter['==AREAS.ID'] = null;

	// select, order
	$order = [];
	$select[] = 'ID';
	$rawOrder = $this->getOrder();
	if (isset($rawOrder['by']) && isset($rawOrder['order']))
	{
		$order[$rawOrder['by']] = $rawOrder['order'];
		if (!in_array($rawOrder['by'], $select))
		{
			$select[] = $rawOrder['by'];
		}
	}
	foreach ($select as $i => $code)
	{
		if ($code == 'IMAGE')
		{
			$needPreviewPicture = true;
			unset($select[$i]);
		}
		else if ($code == 'DESCRIPTION')
		{
			$needPreviewText = true;
			unset($select[$i]);
		}
		else if ($code == 'LINK')
		{
			$needLink = true;
			unset($select[$i]);
		}
	}

	// limit
	$limit = $this->getLimit();
	if ($limit <= 0)
	{
		$limit = 10;
	}

	$searchContent = [];
	$query = $this->getSearchQuery();
	if ($query)
	{
		if ($cache instanceof CPHPCache)
		{
			$cache->abortDataCache();
		}

		if (mb_strlen($query) < 3)
		{
			return [];
		}

		// search in blocks
		$blockFilter = [];
		if (isset($filter['SITE_ID']))
		{
			$blockFilter['LANDING.SITE_ID'] = $filter['SITE_ID'];
		}
		$blocks = Block::search(
			$query,
			$blockFilter,
			['LID', 'ID', 'SEARCH_CONTENT']
		);
		$landingBlocksIds = [];
		foreach ($blocks as $block)
		{
			$searchContent[$block['LID']] = $this->getSearchSnippet($query, $block['SEARCH_CONTENT']);
			if (!$searchContent[$block['LID']])
			{
				unset($searchContent[$block['LID']]);
			}
			$landingBlocksIds[] = $block['LID'];
		}

		// merge filter with search query
		$filter[] = [
			'LOGIC' => 'OR',
			'TITLE' => '%' . $query . '%',
			'*%SEARCH_CONTENT' => $query,
			'ID' => $landingBlocksIds ? $landingBlocksIds : [-1]
		];
	}

	// get data
	$result = [];
	$res = LandingCore::getList([
		'select' => $select,
		'filter' => $filter,
		'order' => $order,
		'limit' => $limit
	]);
	while ($row = $res->fetch())
	{
		Cache::register($row['ID']);
		$result[$row['ID']] = [
			'TITLE' => htmlspecialcharsbx($row['TITLE'])
		];
	}

	// get meta data
	$metaData = [];
	if (
		$needPreviewPicture ||
		$needPreviewText
	)
	{
		$metaData = $this->getMetadata(
			array_keys($result)
		);
	}

	// and feel result data with meta data
	foreach ($result as $id => &$item)
	{
		if (
			$needPreviewPicture &&
			isset($metaData[$id]['IMAGE'])
		)
		{
			$item['IMAGE'] = [
				'src' => $metaData[$id]['IMAGE'],
				'alt' => $item['TITLE'] ?? ''
			];
		}
		if ($needPreviewText)
		{
			if (isset($searchContent[$id]))
			{
				$item['DESCRIPTION'] = htmlspecialcharsbx($searchContent[$id]);
			}
			else if (isset($metaData[$id]['DESCRIPTION']))
			{
				$item['DESCRIPTION'] = htmlspecialcharsbx($metaData[$id]['DESCRIPTION']);
			}
		}
		if ($needLink)
		{
			$item['LINK'] = '#landing' . $id;
		}
		if ($query)
		{
			$item['_GET'] = [
				'q' => $query
			];
		}
	}

	return array_values($result);
}