memories/lib/Db/TimelineWrite.php

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<?php
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declare(strict_types=1);
namespace OCA\Memories\Db;
use OCA\Memories\AppInfo\Application;
use OCA\Memories\Exif;
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use OCP\DB\QueryBuilder\IQueryBuilder;
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use OCP\Files\File;
use OCP\IDBConnection;
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use OCP\IPreview;
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class TimelineWrite
{
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protected IDBConnection $connection;
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protected IPreview $preview;
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public function __construct(IDBConnection $connection, IPreview &$preview)
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{
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$this->connection = $connection;
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$this->preview = $preview;
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}
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/**
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* Check if a file has a valid mimetype for processing.
*
* @return int 0 for invalid, 1 for image, 2 for video
*/
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public function getFileType(File $file): int
{
$mime = $file->getMimeType();
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if (\in_array($mime, Application::IMAGE_MIMES, true)) {
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// Make sure preview generator supports the mime type
if (!$this->preview->isMimeSupported($mime)) {
return 0;
}
return 1;
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}
if (\in_array($mime, Application::VIDEO_MIMES, true)) {
return 2;
}
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return 0;
}
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/**
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* Process a file to insert Exif data into the database.
*
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* @return int 2 if processed, 1 if skipped, 0 if not valid
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*/
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public function processFile(
File &$file,
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bool $force = false
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): int {
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// There is no easy way to UPSERT in a standard SQL way, so just
// do multiple calls. The worst that can happen is more updates,
// but that's not a big deal.
// https://stackoverflow.com/questions/15252213/sql-standard-upsert-call
// Check if we want to process this file
$fileType = $this->getFileType($file);
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$isvideo = (2 === $fileType);
if (!$fileType) {
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return 0;
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}
// Get parameters
$mtime = $file->getMtime();
$fileId = $file->getId();
// Check if need to update
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$query = $this->connection->getQueryBuilder();
$query->select('fileid', 'mtime')
->from('memories')
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->where($query->expr()->eq('fileid', $query->createNamedParameter($fileId, IQueryBuilder::PARAM_INT)))
;
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$cursor = $query->executeQuery();
$prevRow = $cursor->fetch();
$cursor->closeCursor();
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if ($prevRow && !$force && (int) $prevRow['mtime'] === $mtime) {
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return 1;
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}
// Get exif data
$exif = [];
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try {
$exif = Exif::getExifFromFile($file);
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} catch (\Exception $e) {
}
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// Get more parameters
$dateTaken = Exif::getDateTaken($file, $exif);
$dayId = floor($dateTaken / 86400);
$dateTaken = gmdate('Y-m-d H:i:s', $dateTaken);
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[$w, $h] = Exif::getDimensions($exif);
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// Video parameters
$videoDuration = 0;
if ($isvideo) {
$videoDuration = round($exif['Duration'] ?? $exif['TrackDuration'] ?? 0);
}
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// Truncate any fields >2048 chars
foreach ($exif as $key => &$value) {
if (\is_string($value) && \strlen($value) > 2048) {
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$exif[$key] = substr($value, 0, 2048);
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}
}
// Store JSON string
$exifJson = json_encode($exif);
// Store error if data > 64kb
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if (\is_string($exifJson)) {
if (\strlen($exifJson) > 65535) {
$exifJson = json_encode(['error' => 'Exif data too large']);
}
} else {
$exifJson = json_encode(['error' => 'Exif data encoding error']);
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}
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if ($prevRow) {
// Update existing row
// No need to set objectid again
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$query->update('memories')
->set('dayid', $query->createNamedParameter($dayId, IQueryBuilder::PARAM_INT))
->set('datetaken', $query->createNamedParameter($dateTaken, IQueryBuilder::PARAM_STR))
->set('mtime', $query->createNamedParameter($mtime, IQueryBuilder::PARAM_INT))
->set('isvideo', $query->createNamedParameter($isvideo, IQueryBuilder::PARAM_INT))
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->set('video_duration', $query->createNamedParameter($videoDuration, IQueryBuilder::PARAM_INT))
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->set('w', $query->createNamedParameter($w, IQueryBuilder::PARAM_INT))
->set('h', $query->createNamedParameter($h, IQueryBuilder::PARAM_INT))
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->set('exif', $query->createNamedParameter($exifJson, IQueryBuilder::PARAM_STR))
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->where($query->expr()->eq('fileid', $query->createNamedParameter($fileId, IQueryBuilder::PARAM_INT)))
;
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$query->executeStatement();
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} else {
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// Try to create new row
try {
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$query->insert('memories')
->values([
'fileid' => $query->createNamedParameter($fileId, IQueryBuilder::PARAM_INT),
'objectid' => $query->createNamedParameter((string) $fileId, IQueryBuilder::PARAM_STR),
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'dayid' => $query->createNamedParameter($dayId, IQueryBuilder::PARAM_INT),
'datetaken' => $query->createNamedParameter($dateTaken, IQueryBuilder::PARAM_STR),
'mtime' => $query->createNamedParameter($mtime, IQueryBuilder::PARAM_INT),
'isvideo' => $query->createNamedParameter($isvideo, IQueryBuilder::PARAM_INT),
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'video_duration' => $query->createNamedParameter($videoDuration, IQueryBuilder::PARAM_INT),
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'w' => $query->createNamedParameter($w, IQueryBuilder::PARAM_INT),
'h' => $query->createNamedParameter($h, IQueryBuilder::PARAM_INT),
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'exif' => $query->createNamedParameter($exifJson, IQueryBuilder::PARAM_STR),
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])
;
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$query->executeStatement();
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} catch (\Exception $ex) {
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error_log('Failed to create memories record: '.$ex->getMessage());
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}
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}
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return 2;
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}
/**
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* Remove a file from the exif database.
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*/
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public function deleteFile(File &$file)
{
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$query = $this->connection->getQueryBuilder();
$query->delete('memories')
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->where($query->expr()->eq('fileid', $query->createNamedParameter($file->getId(), IQueryBuilder::PARAM_INT)))
;
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$query->executeStatement();
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}
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/**
* Clear the entire index. Does not need confirmation!
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*
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* @param File $file
*/
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public function clear()
{
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$sql = $this->connection->getDatabasePlatform()->getTruncateTableSQL('`*PREFIX*memories`', false);
$this->connection->executeStatement($sql);
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}
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}