memories/lib/Db/TimelineQueryDays.php

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<?php
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declare(strict_types=1);
namespace OCA\Memories\Db;
use OCP\DB\QueryBuilder\IQueryBuilder;
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use OCP\Files\Folder;
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use OCP\IDBConnection;
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const CTE_FOLDERS = // CTE to get all folders recursively in the given top folder
'WITH RECURSIVE *PREFIX*cte_folders(fileid) AS (
SELECT
f.fileid
FROM
*PREFIX*filecache f
WHERE
f.fileid = :topFolderId
UNION ALL
SELECT
f.fileid
FROM
*PREFIX*filecache f
INNER JOIN *PREFIX*cte_folders c
ON (f.parent = c.fileid
AND f.mimetype = 2
AND f.fileid <> :excludedFolderId
)
)';
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trait TimelineQueryDays
{
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protected IDBConnection $connection;
/**
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* Get the days response from the database for the timeline.
*
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* @param null|Folder $folder The folder to get the days from
* @param bool $recursive Whether to get the days recursively
* @param bool $archive Whether to get the days only from the archive folder
* @param array $queryTransforms An array of query transforms to apply to the query
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*
* @return array The days response
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*/
public function getDays(
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&$folder,
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string $uid,
bool $recursive,
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bool $archive,
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array $queryTransforms = []
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): array {
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$query = $this->connection->getQueryBuilder();
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// Get all entries also present in filecache
$count = $query->func()->count($query->createFunction('DISTINCT m.fileid'), 'count');
$query->select('m.dayid', $count)
->from('memories', 'm')
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;
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$query = $this->joinFilecache($query, $folder, $recursive, $archive);
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// Group and sort by dayid
$query->groupBy('m.dayid')
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->orderBy('m.dayid', 'DESC')
;
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// Apply all transformations
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$this->applyAllTransforms($queryTransforms, $query, $uid);
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$cursor = $this->executeQueryWithCTEs($query);
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$rows = $cursor->fetchAll();
$cursor->closeCursor();
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return $this->processDays($rows);
}
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/**
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* Get the day response from the database for the timeline.
*
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* @param null|Folder $folder The folder to get the day from
* @param string $uid The user id
* @param int[] $dayid The day id
* @param bool $recursive If the query should be recursive
* @param bool $archive If the query should include only the archive folder
* @param array $queryTransforms The query transformations to apply
* @param mixed $day_ids
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*
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* @return array An array of day responses
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*/
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public function getDay(
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&$folder,
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string $uid,
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$day_ids,
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bool $recursive,
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bool $archive,
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array $queryTransforms = []
): array {
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$query = $this->connection->getQueryBuilder();
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// Get all entries also present in filecache
$fileid = $query->createFunction('DISTINCT m.fileid');
// We don't actually use m.datetaken here, but postgres
// needs that all fields in ORDER BY are also in SELECT
// when using DISTINCT on selected fields
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$query->select($fileid, 'f.etag', 'm.isvideo', 'vco.categoryid', 'm.datetaken', 'm.dayid', 'm.w', 'm.h')
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->from('memories', 'm')
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;
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$query = $this->joinFilecache($query, $folder, $recursive, $archive);
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// Filter by dayid unless wildcard
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if (null !== $day_ids) {
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$query->andWhere($query->expr()->in('m.dayid', $query->createNamedParameter($day_ids, IQueryBuilder::PARAM_INT_ARRAY)));
} else {
// Limit wildcard to 100 results
$query->setMaxResults(100);
}
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// Add favorite field
$this->addFavoriteTag($query, $uid);
// Group and sort by date taken
$query->orderBy('m.datetaken', 'DESC');
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$query->addOrderBy('m.fileid', 'DESC'); // tie-breaker
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// Apply all transformations
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$this->applyAllTransforms($queryTransforms, $query, $uid);
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$cursor = $this->executeQueryWithCTEs($query);
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$rows = $cursor->fetchAll();
$cursor->closeCursor();
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return $this->processDay($rows);
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}
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/**
* Process the days response.
*
* @param array $days
*/
private function processDays(&$days)
{
foreach ($days as &$row) {
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$row['dayid'] = (int) $row['dayid'];
$row['count'] = (int) $row['count'];
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}
return $days;
}
/**
* Process the single day response.
*
* @param array $day
*/
private function processDay(&$day)
{
foreach ($day as &$row) {
// We don't need date taken (see query builder)
unset($row['datetaken']);
// Convert field types
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$row['fileid'] = (int) $row['fileid'];
$row['isvideo'] = (int) $row['isvideo'];
$row['dayid'] = (int) $row['dayid'];
$row['w'] = (int) $row['w'];
$row['h'] = (int) $row['h'];
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if (!$row['isvideo']) {
unset($row['isvideo']);
}
if ($row['categoryid']) {
$row['isfavorite'] = 1;
}
unset($row['categoryid']);
// All transform processing
$this->processFace($row);
}
return $day;
}
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private function executeQueryWithCTEs(IQueryBuilder &$query, string $psql = '')
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{
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$sql = empty($psql) ? $query->getSQL() : $psql;
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$params = $query->getParameters();
$types = $query->getParameterTypes();
// Add WITH clause if needed
if (false !== strpos($sql, 'cte_folders')) {
$sql = CTE_FOLDERS.' '.$sql;
}
return $this->connection->executeQuery($sql, $params, $types);
}
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/**
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* Get all folders inside a top folder.
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*/
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private function addSubfolderJoinParams(
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IQueryBuilder &$query,
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Folder &$folder,
bool $archive
) {
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// Query parameters, set at the end
$topFolderId = $folder->getId();
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$excludedFolderId = -1;
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/** @var Folder Archive folder if it exists */
$archiveFolder = null;
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try {
$archiveFolder = $folder->get('.archive/');
} catch (\OCP\Files\NotFoundException $e) {
}
if (!$archive) {
// Exclude archive folder
if ($archiveFolder) {
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$excludedFolderId = $archiveFolder->getId();
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}
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} else {
// Only include archive folder
$topFolderId = $archiveFolder ? $archiveFolder->getId() : -1;
}
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// Add query parameters
$query->setParameter('topFolderId', $topFolderId, IQueryBuilder::PARAM_INT);
$query->setParameter('excludedFolderId', $excludedFolderId, IQueryBuilder::PARAM_INT);
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}
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/**
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* Inner join with oc_filecache.
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*
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* @param IQueryBuilder $query Query builder
* @param null|Folder $folder Either the top folder or null for all
* @param bool $recursive Whether to get the days recursively
* @param bool $archive Whether to get the days only from the archive folder
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*/
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private function joinFilecache(
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IQueryBuilder &$query,
&$folder,
bool $recursive,
bool $archive
) {
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// Join with memories
$baseOp = $query->expr()->eq('f.fileid', 'm.fileid');
if (null === $folder) {
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return $query->innerJoin('m', 'filecache', 'f', $baseOp);
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}
// Filter by folder (recursive or otherwise)
$pathOp = null;
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if ($recursive) {
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// Join with folders CTE
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$this->addSubfolderJoinParams($query, $folder, $archive);
$query->innerJoin('f', 'cte_folders', 'cte_f', $query->expr()->eq('f.parent', 'cte_f.fileid'));
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} else {
// If getting non-recursively folder only check for parent
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$pathOp = $query->expr()->eq('f.parent', $query->createNamedParameter($folder->getId(), IQueryBuilder::PARAM_INT));
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}
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return $query->innerJoin('m', 'filecache', 'f', $query->expr()->andX(
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$baseOp,
$pathOp,
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));
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}
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}