Scanner::extractMetadata()   B
last analyzed

Complexity

Conditions 10
Paths 144

Size

Total Lines 72
Code Lines 39

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
cc 10
eloc 39
nc 144
nop 4
dl 0
loc 72
rs 7.2999
c 0
b 0
f 0

How to fix   Long Method    Complexity   

Long Method

Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.

For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.

Commonly applied refactorings include:

1
<?php declare(strict_types=1);
2
3
/**
4
 * ownCloud - Music app
5
 *
6
 * This file is licensed under the Affero General Public License version 3 or
7
 * later. See the COPYING file.
8
 *
9
 * @author Morris Jobke <[email protected]>
10
 * @author Pauli Järvinen <[email protected]>
11
 * @copyright Morris Jobke 2013, 2014
12
 * @copyright Pauli Järvinen 2016 - 2025
13
 */
14
15
namespace OCA\Music\Service;
16
17
use OC\Hooks\PublicEmitter;
18
19
use OCP\Files\File;
20
use OCP\Files\Folder;
21
use OCP\Files\IRootFolder;
22
use OCP\IConfig;
23
use OCP\IL10N;
24
use OCP\L10N\IFactory;
25
26
use OCA\Music\AppFramework\Core\Logger;
27
use OCA\Music\BusinessLayer\ArtistBusinessLayer;
28
use OCA\Music\BusinessLayer\AlbumBusinessLayer;
29
use OCA\Music\BusinessLayer\GenreBusinessLayer;
30
use OCA\Music\BusinessLayer\PlaylistBusinessLayer;
31
use OCA\Music\BusinessLayer\TrackBusinessLayer;
32
use OCA\Music\Db\Cache;
33
use OCA\Music\Db\Maintenance;
34
use OCA\Music\Utility\ArrayUtil;
35
use OCA\Music\Utility\FilesUtil;
36
use OCA\Music\Utility\StringUtil;
37
use OCA\Music\Utility\Util;
38
39
use Symfony\Component\Console\Output\OutputInterface;
40
41
class Scanner extends PublicEmitter {
42
	private Extractor $extractor;
43
	private ArtistBusinessLayer $artistBusinessLayer;
44
	private AlbumBusinessLayer $albumBusinessLayer;
45
	private TrackBusinessLayer $trackBusinessLayer;
46
	private PlaylistBusinessLayer $playlistBusinessLayer;
47
	private GenreBusinessLayer $genreBusinessLayer;
48
	private Cache $cache;
49
	private CoverService $coverService;
50
	private Logger $logger;
51
	private Maintenance $maintenance;
52
	private LibrarySettings $librarySettings;
53
	private IRootFolder $rootFolder;
54
	private IConfig $config;
55
	private IFactory $l10nFactory;
56
57
	public function __construct(ExtractorGetID3 $extractor,
58
								ArtistBusinessLayer $artistBusinessLayer,
59
								AlbumBusinessLayer $albumBusinessLayer,
60
								TrackBusinessLayer $trackBusinessLayer,
61
								PlaylistBusinessLayer $playlistBusinessLayer,
62
								GenreBusinessLayer $genreBusinessLayer,
63
								Cache $cache,
64
								CoverService $coverService,
65
								Logger $logger,
66
								Maintenance $maintenance,
67
								LibrarySettings $librarySettings,
68
								IRootFolder $rootFolder,
69
								IConfig $config,
70
								IFactory $l10nFactory) {
71
		$this->extractor = $extractor;
72
		$this->artistBusinessLayer = $artistBusinessLayer;
73
		$this->albumBusinessLayer = $albumBusinessLayer;
74
		$this->trackBusinessLayer = $trackBusinessLayer;
75
		$this->playlistBusinessLayer = $playlistBusinessLayer;
76
		$this->genreBusinessLayer = $genreBusinessLayer;
77
		$this->cache = $cache;
78
		$this->coverService = $coverService;
79
		$this->logger = $logger;
80
		$this->maintenance = $maintenance;
81
		$this->librarySettings = $librarySettings;
82
		$this->rootFolder = $rootFolder;
83
		$this->config = $config;
84
		$this->l10nFactory = $l10nFactory;
85
	}
86
87
	/**
88
	 * Gets called by 'post_write' (file creation, file update) and 'post_share' hooks
89
	 */
90
	public function update(File $file, string $userId, string $filePath) : void {
91
		$mimetype = $file->getMimeType();
92
		$isImage = StringUtil::startsWith($mimetype, 'image');
93
		$isAudio = (StringUtil::startsWith($mimetype, 'audio') && !self::isPlaylistMime($mimetype));
94
95
		if (($isImage || $isAudio) && $this->librarySettings->pathBelongsToMusicLibrary($filePath, $userId)) {
96
			$this->logger->debug("audio or image file within lib path updated: $filePath");
97
98
			if ($isImage) {
99
				$this->updateImage($file, $userId);
100
			}
101
			elseif ($isAudio) {
102
				$libraryRoot = $this->librarySettings->getFolder($userId);
103
				$this->updateAudio($file, $userId, $libraryRoot, $filePath, $mimetype, /*partOfScan=*/false);
104
			}
105
		}
106
	}
107
108
	public function fileMoved(File $file, string $userId) : void {
109
		$mimetype = $file->getMimeType();
110
111
		if (StringUtil::startsWith($mimetype, 'image')) {
112
			$this->logger->debug('image file moved: '. $file->getPath());
113
			// we don't need to track the identity of images and moving a file can be handled as it was 
114
			// a file deletion followed by a file addition
115
			$this->deleteImage([$file->getId()], [$userId]);
116
			$this->updateImage($file, $userId);
117
		}
118
		elseif (StringUtil::startsWith($mimetype, 'audio') && !self::isPlaylistMime($mimetype)) {
119
			$this->logger->debug('audio file moved: '. $file->getPath());
120
			if ($this->librarySettings->pathBelongsToMusicLibrary($file->getPath(), $userId)) {
121
				// In the new path, the file (now or still) belongs to the library. Even if it was already in the lib,
122
				// the new path may have an influence on the album or artist name (in case of incomplete metadata).
123
				$libraryRoot = $this->librarySettings->getFolder($userId);
124
				$this->updateAudio($file, $userId, $libraryRoot, $file->getPath(), $mimetype, /*partOfScan=*/false);
125
			} else {
126
				// In the new path, the file doesn't (still or any longer) belong to the library. Remove it if
127
				// it happened to be in the library.
128
				$this->deleteAudio([$file->getId()], [$userId]);
129
			}
130
		}
131
	}
132
133
	public function folderMoved(Folder $folder, string $userId) : void {
134
		$audioFiles = $folder->searchByMime('audio');
135
		$audioCount = \count($audioFiles);
136
137
		if ($audioCount > 0) {
138
			$this->logger->debug("folder with $audioCount audio files moved: ". $folder->getPath());
139
140
			if ($this->librarySettings->pathBelongsToMusicLibrary($folder->getPath(), $userId)) {
141
				// The new path of the folder belongs to the library but this doesn't necessarily mean
142
				// that all the file paths below belong to the library, because of the path exclusions.
143
				// Each file needs to be checked and updated separately.
144
				if ($audioCount <= 15) {
145
					foreach ($audioFiles as $file) {
146
						\assert($file instanceof File); // a clue for PHPStan
147
						$this->fileMoved($file, $userId);
148
					}
149
				} else {
150
					// There are too many files to handle them now as we don't want to delay the move operation
151
					// too much. The user will be prompted to rescan the files upon opening the Music app.
152
					$this->trackBusinessLayer->markTracksDirty(ArrayUtil::extractIds($audioFiles), [$userId]);
153
				}
154
			}
155
			else {
156
				// The new path of the folder doesn't belong to the library so neither does any of the
157
				// contained files. Remove audio files from the lib if found.
158
				$this->deleteAudio(ArrayUtil::extractIds($audioFiles), [$userId]);
159
			}
160
		}
161
	}
162
163
	private static function isPlaylistMime(string $mime) : bool {
164
		return $mime == 'audio/mpegurl' || $mime == 'audio/x-scpls';
165
	}
166
167
	private function updateImage(File $file, string $userId) : void {
168
		$coverFileId = $file->getId();
169
		$parentFolderId = $file->getParent()->getId();
170
		if ($this->albumBusinessLayer->updateFolderCover($coverFileId, $parentFolderId)) {
171
			$this->logger->debug('updateImage - the image was set as cover for some album(s)');
172
			$this->cache->remove($userId, 'collection');
173
		}
174
175
		$artistIds = $this->artistBusinessLayer->updateCover($file, $userId, $this->userL10N($userId));
176
		foreach ($artistIds as $artistId) {
177
			$this->logger->debug("updateImage - the image was set as cover for the artist $artistId");
178
			$this->coverService->removeArtistCoverFromCache($artistId, $userId);
179
		}
180
	}
181
182
	/**
183
	 * @return array Information about consumed time: ['analyze' => int|float, 'db update' => int|float]
184
	 */
185
	private function updateAudio(File $file, string $userId, Folder $libraryRoot, string $filePath, string $mimetype, bool $partOfScan) : array {
186
		$this->emit(self::class, 'update', [$filePath]);
187
188
		$time1 = \hrtime(true);
189
		$analysisEnabled = $this->librarySettings->getScanMetadataEnabled($userId);
190
		$meta = $this->extractMetadata($file, $libraryRoot, $filePath, $analysisEnabled);
191
		$fileId = $file->getId();
192
		$time2 = \hrtime(true);
193
194
		// add/update artist and get artist entity
195
		$artist = $this->artistBusinessLayer->addOrUpdateArtist($meta['artist'], $userId);
196
		$artistId = $artist->getId();
197
198
		// add/update albumArtist and get artist entity
199
		$albumArtist = $this->artistBusinessLayer->addOrUpdateArtist($meta['albumArtist'], $userId);
200
		$albumArtistId = $albumArtist->getId();
201
202
		// add/update album and get album entity
203
		$album = $this->albumBusinessLayer->addOrUpdateAlbum($meta['album'], $albumArtistId, $userId);
204
		$albumId = $album->getId();
205
206
		// add/update genre and get genre entity
207
		$genre = $this->genreBusinessLayer->addOrUpdateGenre($meta['genre'], $userId);
208
209
		// add/update track and get track entity
210
		$track = $this->trackBusinessLayer->addOrUpdateTrack(
211
				$meta['title'], $meta['trackNumber'], $meta['discNumber'], $meta['year'], $genre->getId(),
212
				$artistId, $albumId, $fileId, $mimetype, $userId, $meta['length'], $meta['bitrate']);
213
214
		// if present, use the embedded album art as cover for the respective album
215
		if ($meta['picture'] != null) {
216
			// during scanning, don't repeatedly change the file providing the art for the album
217
			if ($album->getCoverFileId() === null || !$partOfScan) {
218
				$this->albumBusinessLayer->setCover($fileId, $albumId);
219
				$this->coverService->removeAlbumCoverFromCache($albumId, $userId);
220
			}
221
		}
222
		// if this file is an existing file which previously was used as cover for an album but now
223
		// the file no longer contains any embedded album art
224
		elseif ($album->getCoverFileId() === $fileId) {
225
			$this->albumBusinessLayer->removeCovers([$fileId]);
226
			$this->findEmbeddedCoverForAlbum($albumId, $userId, $libraryRoot);
227
			$this->coverService->removeAlbumCoverFromCache($albumId, $userId);
228
		}
229
		$time3 = \hrtime(true);
230
231
		if (!$partOfScan) {
232
			// invalidate the cache as the music collection was changed
233
			$this->cache->remove($userId, 'collection');
234
		}
235
236
		$this->logger->debug('imported entities - ' .
237
				"artist: $artistId, albumArtist: $albumArtistId, album: $albumId, track: {$track->getId()}");
238
239
		return [
240
			'analyze' => $time2 - $time1,
241
			'db update' => $time3 - $time2
242
		];
243
	}
244
245
	private function extractMetadata(File $file, Folder $libraryRoot, string $filePath, bool $analyzeFile) : array {
246
		$fieldsFromFileName = self::parseFileName($file->getName());
247
		$fileInfo = $analyzeFile ? $this->extractor->extract($file) : [];
248
		$meta = [];
249
250
		// Track artist and album artist
251
		$meta['artist'] = ExtractorGetID3::getTag($fileInfo, 'artist');
252
		$meta['albumArtist'] = ExtractorGetID3::getFirstOfTags($fileInfo, ['band', 'albumartist', 'album artist', 'album_artist']);
253
254
		// use artist and albumArtist as fallbacks for each other
255
		if (!StringUtil::isNonEmptyString($meta['albumArtist'])) {
256
			$meta['albumArtist'] = $meta['artist'];
257
		}
258
259
		if (!StringUtil::isNonEmptyString($meta['artist'])) {
260
			$meta['artist'] = $meta['albumArtist'];
261
		}
262
263
		if (!StringUtil::isNonEmptyString($meta['artist'])) {
264
			// neither artist nor albumArtist set in fileinfo, use the second level parent folder name
265
			// unless it is the user's library root folder
266
			$dirPath = \dirname(\dirname($filePath));
267
			if (StringUtil::startsWith($libraryRoot->getPath(), $dirPath)) {
268
				$artistName = null;
269
			} else {
270
				$artistName = \basename($dirPath);
271
			}
272
273
			$meta['artist'] = $artistName;
274
			$meta['albumArtist'] = $artistName;
275
		}
276
277
		// title
278
		$meta['title'] = ExtractorGetID3::getTag($fileInfo, 'title');
279
		if (!StringUtil::isNonEmptyString($meta['title'])) {
280
			$meta['title'] = $fieldsFromFileName['title'];
281
		}
282
283
		// album
284
		$meta['album'] = ExtractorGetID3::getTag($fileInfo, 'album');
285
		if (!StringUtil::isNonEmptyString($meta['album'])) {
286
			// album name not set in fileinfo, use parent folder name as album name unless it is the user's library root folder
287
			$dirPath = \dirname($filePath);
288
			if ($libraryRoot->getPath() === $dirPath) {
289
				$meta['album'] = null;
290
			} else {
291
				$meta['album'] = \basename($dirPath);
292
			}
293
		}
294
295
		// track number
296
		$meta['trackNumber'] = ExtractorGetID3::getFirstOfTags($fileInfo, ['track_number', 'tracknumber', 'track'],
297
				$fieldsFromFileName['track_number']);
298
		$meta['trackNumber'] = self::normalizeOrdinal($meta['trackNumber']);
299
300
		// disc number
301
		$meta['discNumber'] = ExtractorGetID3::getFirstOfTags($fileInfo, ['disc_number', 'discnumber', 'part_of_a_set'], '1');
302
		$meta['discNumber'] = self::normalizeOrdinal($meta['discNumber']);
303
304
		// year
305
		$meta['year'] = ExtractorGetID3::getFirstOfTags($fileInfo, ['year', 'date', 'creation_date']);
306
		$meta['year'] = self::normalizeYear($meta['year']);
307
308
		$meta['genre'] = ExtractorGetID3::getTag($fileInfo, 'genre') ?: ''; // empty string used for "scanned but unknown"
309
310
		$meta['picture'] = ExtractorGetID3::getTag($fileInfo, 'picture', true);
311
312
		$meta['length'] = self::normalizeUnsigned($fileInfo['playtime_seconds'] ?? null);
313
314
		$meta['bitrate'] = self::normalizeUnsigned($fileInfo['audio']['bitrate'] ?? null);
315
316
		return $meta;
317
	}
318
319
	/**
320
	 * @param string[] $affectedUsers
321
	 * @param int[] $affectedAlbums
322
	 * @param int[] $affectedArtists
323
	 */
324
	private function invalidateCacheOnDelete(array $affectedUsers, array $affectedAlbums, array $affectedArtists) : void {
325
		// Delete may be for one file or for a folder containing thousands of albums.
326
		// If loads of albums got affected, then ditch the whole cache of the affected
327
		// users because removing the cached covers one-by-one could delay the delete
328
		// operation significantly.
329
		$albumCount = \count($affectedAlbums);
330
		$artistCount = \count($affectedArtists);
331
		$userCount = \count($affectedUsers);
332
333
		if ($albumCount + $artistCount > 100) {
334
			$this->logger->debug("Delete operation affected $albumCount albums and $artistCount artists. " .
335
								"Invalidate the whole cache of all affected users ($userCount).");
336
			foreach ($affectedUsers as $user) {
337
				$this->cache->remove($user);
338
			}
339
		} else {
340
			// remove the cached covers
341
			if ($artistCount > 0) {
342
				$this->logger->debug("Remove covers of $artistCount artist(s) from the cache (if present)");
343
				foreach ($affectedArtists as $artistId) {
344
					$this->coverService->removeArtistCoverFromCache($artistId);
345
				}
346
			}
347
348
			if ($albumCount > 0) {
349
				$this->logger->debug("Remove covers of $albumCount album(s) from the cache (if present)");
350
				foreach ($affectedAlbums as $albumId) {
351
					$this->coverService->removeAlbumCoverFromCache($albumId);
352
				}
353
			}
354
355
			// remove the cached collection regardless of if covers were affected; it may be that this
356
			// function got called after a track was deleted and there are no album/artist changes
357
			foreach ($affectedUsers as $user) {
358
				$this->cache->remove($user, 'collection');
359
			}
360
		}
361
	}
362
363
	/**
364
	 * @param int[] $fileIds
365
	 * @param string[]|null $userIds
366
	 * @return boolean true if anything was removed
367
	 */
368
	private function deleteAudio(array $fileIds, ?array $userIds=null) : bool {
369
		$result = $this->trackBusinessLayer->deleteTracks($fileIds, $userIds);
370
371
		if ($result) { // one or more tracks were removed
372
			$this->logger->debug('library updated when audio file(s) removed: '. \implode(', ', $fileIds));
373
374
			// remove obsolete artists and albums, and track references in playlists
375
			$this->albumBusinessLayer->deleteById($result['obsoleteAlbums']);
376
			$this->artistBusinessLayer->deleteById($result['obsoleteArtists']);
377
			$this->playlistBusinessLayer->removeTracksFromAllLists($result['deletedTracks']);
378
379
			// check if a removed track was used as embedded cover art file for a remaining album
380
			foreach ($result['remainingAlbums'] as $albumId) {
381
				if ($this->albumBusinessLayer->albumCoverIsOneOfFiles($albumId, $fileIds)) {
382
					$this->albumBusinessLayer->setCover(null, $albumId);
383
					$this->findEmbeddedCoverForAlbum($albumId);
384
					$this->coverService->removeAlbumCoverFromCache($albumId);
385
				}
386
			}
387
388
			$this->invalidateCacheOnDelete(
389
					$result['affectedUsers'], $result['obsoleteAlbums'], $result['obsoleteArtists']);
390
391
			$this->logger->debug('removed entities: ' . \json_encode($result));
392
			$this->emit(self::class, 'delete', [$result['deletedTracks'], $result['affectedUsers']]);
393
		}
394
395
		return $result !== false;
396
	}
397
398
	/**
399
	 * @param int[] $fileIds
400
	 * @param string[]|null $userIds
401
	 * @return boolean true if anything was removed
402
	 */
403
	private function deleteImage(array $fileIds, ?array $userIds=null) : bool {
404
		$affectedAlbums = $this->albumBusinessLayer->removeCovers($fileIds, $userIds);
405
		$affectedArtists = $this->artistBusinessLayer->removeCovers($fileIds, $userIds);
406
407
		$anythingAffected = (\count($affectedAlbums) + \count($affectedArtists) > 0);
408
409
		if ($anythingAffected) {
410
			$this->logger->debug('library covers updated when image file(s) removed: '. \implode(', ', $fileIds));
411
412
			$affectedUsers = \array_merge(
413
				ArrayUtil::extractUserIds($affectedAlbums),
414
				ArrayUtil::extractUserIds($affectedArtists)
415
			);
416
			$affectedUsers = \array_unique($affectedUsers);
417
418
			$this->invalidateCacheOnDelete(
419
					$affectedUsers, ArrayUtil::extractIds($affectedAlbums), ArrayUtil::extractIds($affectedArtists));
420
		}
421
422
		return $anythingAffected;
423
	}
424
425
	/**
426
	 * Gets called by 'unshare' hook and 'delete' hook
427
	 *
428
	 * @param int $fileId ID of the deleted files
429
	 * @param string[]|null $userIds the IDs of the users to remove the file from; if omitted,
430
	 *                               the file is removed from all users (ie. owner and sharees)
431
	 */
432
	public function delete(int $fileId, ?array $userIds=null) : void {
433
		// The removed file may or may not be of interesting type and belong to the library. It's
434
		// most efficient just to try to remove it as audio or image. It will take just a few simple
435
		// DB queries to notice if the file had nothing to do with our library.
436
		if (!$this->deleteAudio([$fileId], $userIds)) {
437
			$this->deleteImage([$fileId], $userIds);
438
		}
439
	}
440
441
	/**
442
	 * Remove all audio files and cover images in the given folder from the database.
443
	 * This gets called when a folder is deleted or unshared from the user.
444
	 *
445
	 * @param Folder $folder
446
	 * @param string[]|null $userIds the IDs of the users to remove the folder from; if omitted,
447
	 *                               the folder is removed from all users (ie. owner and sharees)
448
	 */
449
	public function deleteFolder(Folder $folder, ?array $userIds=null) : void {
450
		$audioFiles = $folder->searchByMime('audio');
451
		if (\count($audioFiles) > 0) {
452
			$this->deleteAudio(ArrayUtil::extractIds($audioFiles), $userIds);
453
		}
454
455
		// NOTE: When a folder is removed, we don't need to check for any image
456
		// files in the folder. This is because those images could be potentially
457
		// used as covers only on the audio files of the same folder and those
458
		// were already removed above.
459
	}
460
461
	/**
462
	 * search for image files by mimetype inside user specified library path
463
	 * (which defaults to user home dir)
464
	 *
465
	 * @return File[]
466
	 */
467
	private function getImageFiles(string $userId) : array {
468
		try {
469
			$folder = $this->librarySettings->getFolder($userId);
470
		} catch (\OCP\Files\NotFoundException $e) {
471
			return [];
472
		}
473
474
		$images = $folder->searchByMime('image');
475
476
		// filter out any images in the excluded folders
477
		return \array_filter($images, function ($image) use ($userId) {
478
			return ($image instanceof File) // assure PHPStan that Node indeed is File
479
				&& $this->librarySettings->pathBelongsToMusicLibrary($image->getPath(), $userId);
480
		});
481
	}
482
483
	private function getScannedFileIds(string $userId) : array {
484
		return $this->trackBusinessLayer->findAllFileIds($userId);
485
	}
486
487
	private function getMusicFolder(string $userId, ?string $path) : Folder {
488
		$folder = $this->librarySettings->getFolder($userId);
489
490
		if (!empty($path)) {
491
			$userFolder = $this->resolveUserFolder($userId);
492
			$requestedFolder = FilesUtil::getFolderFromRelativePath($userFolder, $path);
493
			if ($folder->isSubNode($requestedFolder) || $folder->getPath() == $requestedFolder->getPath()) {
494
				$folder = $requestedFolder;
495
			} else {
496
				throw new \OCP\Files\NotFoundException();
497
			}
498
		}
499
500
		return $folder;
501
	}
502
503
	/**
504
	 * Search for music files by mimetype inside user specified library path
505
	 * (which defaults to user home dir). Exclude given array of IDs.
506
	 * Optionally, limit the search to only the specified path. If this path doesn't
507
	 * point within the library path, then nothing will be found.
508
	 *
509
	 * @param int[] $excludeIds
510
	 * @return int[]
511
	 */
512
	private function getAllMusicFileIdsExcluding(string $userId, ?string $path, array $excludeIds) : array {
513
		try {
514
			$folder = $this->getMusicFolder($userId, $path);
515
		} catch (\OCP\Files\NotFoundException $e) {
516
			return [];
517
		}
518
519
		// Search files with mime 'audio/*' but filter out the playlist files and files under excluded folders
520
		$files = $folder->searchByMime('audio');
521
522
		// Look-up-table of IDs to be excluded from the final result
523
		$excludeIdsLut = \array_flip($excludeIds);
524
525
		$files = \array_filter($files, function ($f) use ($userId, $excludeIdsLut) {
526
			return !isset($excludeIdsLut[$f->getId()])
527
					&& !self::isPlaylistMime($f->getMimeType())
528
					&& $this->librarySettings->pathBelongsToMusicLibrary($f->getPath(), $userId);
529
		});
530
531
		return \array_values(ArrayUtil::extractIds($files)); // the array may be sparse before array_values
532
	}
533
534
	public function getAllMusicFileIds(string $userId, ?string $path = null) : array {
535
		return $this->getAllMusicFileIdsExcluding($userId, $path, []);
536
	}
537
538
	public function getUnscannedMusicFileIds(string $userId, ?string $path = null) : array {
539
		$scannedIds = $this->getScannedFileIds($userId);
540
		$unscannedIds = $this->getAllMusicFileIdsExcluding($userId, $path, $scannedIds);
541
542
		$count = \count($unscannedIds);
543
		if ($count) {
544
			$this->logger->info("Found $count unscanned music files for user $userId");
545
		} else {
546
			$this->logger->debug("No unscanned music files for user $userId");
547
		}
548
549
		return $unscannedIds;
550
	}
551
552
	/**
553
	 * Find already scanned music files which have been modified since the time they were scanned
554
	 *
555
	 * @return int[]
556
	 */
557
	public function getDirtyMusicFileIds(string $userId, ?string $path = null) : array {
558
		$fileIds = $this->trackBusinessLayer->findDirtyFileIds($userId);
559
560
		// filter by path if given
561
		if (!empty($path)) {
562
			try {
563
				$folder = $this->getMusicFolder($userId, $path);
564
			} catch (\OCP\Files\NotFoundException $e) {
565
				return [];
566
			}
567
			$fileIds = \array_filter($fileIds, fn(int $fileId) => (\count($folder->getById($fileId)) > 0));
568
		}
569
570
		return \array_values($fileIds); // make the array non-sparse
571
	}
572
573
	/**
574
	 * @return array ['count' => int, 'anlz_time' => int, 'db_time' => int], times in milliseconds
575
	 */
576
	public function scanFiles(string $userId, array $fileIds, ?OutputInterface $debugOutput = null) : array {
577
		$count = \count($fileIds);
578
		$this->logger->debug("Scanning $count files of user $userId");
579
580
		// back up the execution time limit
581
		$executionTime = \intval(\ini_get('max_execution_time'));
582
		// set execution time limit to unlimited
583
		\set_time_limit(0);
584
585
		$libraryRoot = $this->librarySettings->getFolder($userId);
586
587
		$count = 0;
588
		$totalAnalyzeTime = 0;
589
		$totalDbTime = 0;
590
		foreach ($fileIds as $fileId) {
591
			$this->cache->set($userId, 'scanning', (string)\time()); // update scanning status to prevent simultaneous background cleanup execution
592
593
			$file = $libraryRoot->getById($fileId)[0] ?? null;
594
			if ($file != null && !$this->librarySettings->pathBelongsToMusicLibrary($file->getPath(), $userId)) {
595
				$this->emit(self::class, 'exclude', [$file->getPath()]);
596
				$file = null;
597
			}
598
			if ($file instanceof File) {
599
				$memBefore = $debugOutput ? \memory_get_usage(true) : 0;
600
				list('analyze' => $analyzeTime, 'db update' => $dbTime)
601
					= $this->updateAudio($file, $userId, $libraryRoot, $file->getPath(), $file->getMimetype(), /*partOfScan=*/true);
602
				if ($debugOutput) {
603
					$memAfter = \memory_get_usage(true);
604
					$memDelta = $memAfter - $memBefore;
605
					$fmtMemAfter = Util::formatFileSize($memAfter);
606
					$fmtMemDelta = \mb_chr(0x0394) . Util::formatFileSize($memDelta);
607
					$path = $file->getPath();
608
					$fmtAnalyzeTime = 'anlz:' . (int)($analyzeTime / 1000000) . 'ms';
609
					$fmtDbTime = 'db:' . (int)($dbTime / 1000000) . 'ms';
610
					$debugOutput->writeln("\e[1m $count \e[0m $fmtMemAfter \e[1m ($fmtMemDelta) \e[0m $fmtAnalyzeTime \e[1m $fmtDbTime \e[0m $path");
611
				}
612
				$count++;
613
				$totalAnalyzeTime += $analyzeTime;
614
				$totalDbTime += $dbTime;
615
			} else {
616
				$this->logger->info("File with id $fileId not found for user $userId, removing it from the library if present");
617
				$this->deleteAudio([$fileId], [$userId]);
618
			}
619
		}
620
621
		// reset execution time limit
622
		\set_time_limit($executionTime);
623
624
		// invalidate the cache as the collection has changed and clear the 'scanning' status
625
		$this->cache->remove($userId, 'collection');
626
		$this->cache->remove($userId, 'scanning'); // this isn't completely thread-safe, in case there would be multiple simultaneous scan jobs for the same user for some bizarre reason
627
628
		return [
629
			'count' => $count,
630
			'anlz_time' => (int)($totalAnalyzeTime / 1000000),
631
			'db_time' => (int)($totalDbTime / 1000000)
632
		];
633
	}
634
635
	/**
636
	 * Check the availability of all the indexed audio files of the user. Remove
637
	 * from the index any which are not available.
638
	 * @return int Number of removed files
639
	 */
640
	public function removeUnavailableFiles(string $userId) : int {
641
		$indexedFiles = $this->getScannedFileIds($userId);
642
		$availableFiles = $this->getAllMusicFileIds($userId);
643
		$unavailableFiles = ArrayUtil::diff($indexedFiles, $availableFiles);
644
645
		$count = \count($unavailableFiles);
646
		if ($count > 0) {
647
			$this->logger->info('The following files are no longer available within the library of the '.
648
				"user $userId, removing: " . (string)\json_encode($unavailableFiles));
649
			$this->deleteAudio($unavailableFiles, [$userId]);
650
		}
651
		return $count;
652
	}
653
654
	/**
655
	 * Parse and get basic info about a file. The file does not have to be indexed in the database.
656
	 */
657
	public function getFileInfo(int $fileId, string $userId, Folder $userFolder) : ?array {
658
		$info = $this->getIndexedFileInfo($fileId, $userId, $userFolder)
659
			?: $this->getUnindexedFileInfo($fileId, $userId, $userFolder);
660
661
		// base64-encode and wrap the cover image if available
662
		if ($info !== null && $info['cover'] !== null) {
663
			$mime = $info['cover']['mimetype'];
664
			$content = $info['cover']['content'];
665
			$info['cover'] = 'data:' . $mime. ';base64,' . \base64_encode($content);
666
		}
667
668
		return $info;
669
	}
670
671
	private function getIndexedFileInfo(int $fileId, string $userId, Folder $userFolder) : ?array {
672
		$track = $this->trackBusinessLayer->findByFileId($fileId, $userId);
673
		if ($track !== null) {
674
			$artist = $this->artistBusinessLayer->find($track->getArtistId(), $userId);
675
			$album = $this->albumBusinessLayer->find($track->getAlbumId(), $userId);
676
			return [
677
				'title'      => $track->getTitle(),
678
				'artist'     => $artist->getName(),
679
				'cover'      => $this->coverService->getCover($album, $userId, $userFolder),
680
				'in_library' => true
681
			];
682
		}
683
		return null;
684
	}
685
686
	private function getUnindexedFileInfo(int $fileId, string $userId, Folder $userFolder) : ?array {
687
		$file = $userFolder->getById($fileId)[0] ?? null;
688
		if ($file instanceof File) {
689
			$metadata = $this->extractMetadata($file, $userFolder, $file->getPath(), true);
690
			$cover = $metadata['picture'];
691
			if ($cover != null) {
692
				$cover = $this->coverService->scaleDownAndCrop([
693
					'mimetype' => $cover['image_mime'],
694
					'content' => $cover['data']
695
				], 200);
696
			}
697
			return [
698
				'title'      => $metadata['title'],
699
				'artist'     => $metadata['artist'],
700
				'cover'      => $cover,
701
				'in_library' => $this->librarySettings->pathBelongsToMusicLibrary($file->getPath(), $userId)
702
			];
703
		}
704
		return null;
705
	}
706
707
	/**
708
	 * Update music path
709
	 */
710
	public function updatePath(string $oldPath, string $newPath, string $userId) : void {
711
		$this->logger->info("Changing music collection path of user $userId from $oldPath to $newPath");
712
713
		$userHome = $this->resolveUserFolder($userId);
714
715
		try {
716
			$oldFolder = FilesUtil::getFolderFromRelativePath($userHome, $oldPath);
717
			$newFolder = FilesUtil::getFolderFromRelativePath($userHome, $newPath);
718
719
			if ($newFolder->getPath() === $oldFolder->getPath()) {
720
				$this->logger->debug('New collection path is the same as the old path, nothing to do');
721
			} elseif ($newFolder->isSubNode($oldFolder)) {
722
				$this->logger->debug('New collection path is (grand) parent of old path, previous content is still valid');
723
			} elseif ($oldFolder->isSubNode($newFolder)) {
724
				$this->logger->debug('Old collection path is (grand) parent of new path, checking the validity of previous content');
725
				$this->removeUnavailableFiles($userId);
726
			} else {
727
				$this->logger->debug('Old and new collection paths are unrelated, erasing the previous collection content');
728
				$this->maintenance->resetLibrary($userId);
729
			}
730
		} catch (\OCP\Files\NotFoundException $e) {
731
			$this->logger->warning('One of the paths was invalid, erasing the previous collection content');
732
			$this->maintenance->resetLibrary($userId);
733
		}
734
	}
735
736
	/**
737
	 * Find external cover images for albums which do not yet have one.
738
	 * Target either one user or all users.
739
	 * @param string|null $userId
740
	 * @return bool true if any albums were updated; false otherwise
741
	 */
742
	public function findAlbumCovers(?string $userId = null) : bool {
743
		$affectedUsers = $this->albumBusinessLayer->findCovers($userId);
744
		// scratch the cache for those users whose music collection was touched
745
		foreach ($affectedUsers as $user) {
746
			$this->cache->remove($user, 'collection');
747
			$this->logger->debug('album cover(s) were found for user '. $user);
748
		}
749
		return !empty($affectedUsers);
750
	}
751
752
	/**
753
	 * Find external cover images for artists which do not yet have one.
754
	 * @param string $userId
755
	 * @return bool true if any albums were updated; false otherwise
756
	 */
757
	public function findArtistCovers(string $userId) : bool {
758
		$allImages = $this->getImageFiles($userId);
759
		return $this->artistBusinessLayer->updateCovers($allImages, $userId, $this->userL10N($userId));
760
	}
761
762
	public function resolveUserFolder(string $userId) : Folder {
763
		return $this->rootFolder->getUserFolder($userId);
764
	}
765
766
	/**
767
	 * Get the selected localization of the user, even in case there is no logged in user in the context.
768
	 */
769
	private function userL10N(string $userId) : IL10N {
770
		$languageCode = $this->config->getUserValue($userId, 'core', 'lang');
771
		return $this->l10nFactory->get('music', $languageCode);
772
	}
773
774
	/**
775
	 * @param int|float|string|null $ordinal
776
	 */
777
	private static function normalizeOrdinal(/*mixed*/ $ordinal) : ?int {
778
		if (\is_string($ordinal)) {
779
			// convert format '1/10' to '1'
780
			$ordinal = \explode('/', $ordinal)[0];
781
		}
782
783
		// check for numeric values - cast them to int and verify it's a natural number above 0
784
		if (\is_numeric($ordinal) && ((int)$ordinal) > 0) {
785
			$ordinal = (int)Util::limit((int)$ordinal, 0, Util::SINT32_MAX); // can't use UINT32_MAX since PostgreSQL has no unsigned types
786
		} else {
787
			$ordinal = null;
788
		}
789
790
		return $ordinal;
791
	}
792
793
	private static function parseFileName(string $fileName) : array {
794
		$matches = null;
795
		// If the file name starts e.g like "12. something" or "12 - something", the
796
		// preceding number is extracted as track number. Everything after the optional
797
		// track number + delimiters part but before the file extension is extracted as title.
798
		// The file extension consists of a '.' followed by 1-4 "word characters".
799
		if (\preg_match('/^((\d+)\s*[.-]\s+)?(.+)\.(\w{1,4})$/', $fileName, $matches) === 1) {
800
			return ['track_number' => $matches[2], 'title' => $matches[3]];
801
		} else {
802
			return ['track_number' => null, 'title' => $fileName];
803
		}
804
	}
805
806
	/**
807
	 * @param int|float|string|null $date
808
	 */
809
	private static function normalizeYear(/*mixed*/ $date) : ?int {
810
		$year = null;
811
		$matches = null;
812
813
		if (\is_numeric($date)) {
814
			$year = (int)$date; // the date is a valid year as-is
815
		} elseif (\is_string($date) && \preg_match('/^(\d\d\d\d)-\d\d-\d\d.*/', $date, $matches) === 1) {
816
			$year = (int)$matches[1]; // year from ISO-formatted date yyyy-mm-dd
817
		} else {
818
			$year = null;
819
		}
820
821
		return ($year === null) ? null : (int)Util::limit($year, Util::SINT32_MIN, Util::SINT32_MAX);
822
	}
823
824
	/**
825
	 * @param int|float|string|null $value
826
	 */
827
	private static function normalizeUnsigned(/*mixed*/ $value) : ?int {
828
		if (\is_numeric($value)) {
829
			$value = (int)\round((float)$value);
830
			$value = (int)Util::limit($value, 0, Util::SINT32_MAX); // can't use UINT32_MAX since PostgreSQL has no unsigned types
831
		} else {
832
			$value = null;
833
		}
834
		return $value;
835
	}
836
837
	/**
838
	 * Loop through the tracks of an album and set the first track containing embedded cover art
839
	 * as cover file for the album
840
	 * @param int $albumId
841
	 * @param string|null $userId name of user, deducted from $albumId if omitted
842
	 * @param Folder|null $baseFolder base folder for the search, library root of $userId is used if omitted
843
	 */
844
	private function findEmbeddedCoverForAlbum(int $albumId, ?string $userId=null, ?Folder $baseFolder=null) : void {
845
		if ($userId === null) {
846
			$userId = $this->albumBusinessLayer->findAlbumOwner($albumId);
847
		}
848
		if ($baseFolder === null) {
849
			$baseFolder = $this->librarySettings->getFolder($userId);
850
		}
851
852
		$tracks = $this->trackBusinessLayer->findAllByAlbum($albumId, $userId);
853
		foreach ($tracks as $track) {
854
			$file = $baseFolder->getById($track->getFileId())[0] ?? null;
855
			if ($file instanceof File) {
856
				$image = $this->extractor->parseEmbeddedCoverArt($file);
857
				if ($image != null) {
858
					$this->albumBusinessLayer->setCover($track->getFileId(), $albumId);
859
					break;
860
				}
861
			}
862
		}
863
	}
864
}
865