278 lines
9.1 KiB
Dart
278 lines
9.1 KiB
Dart
import 'dart:async';
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import 'dart:io';
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import 'dart:math';
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import 'package:logging/logging.dart';
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import 'package:photos/core/event_bus.dart';
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import 'package:photos/db/photo_db.dart';
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import 'package:photos/events/photo_upload_event.dart';
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import 'package:photos/events/user_authenticated_event.dart';
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import 'package:photos/photo_repository.dart';
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import 'package:photos/photo_provider.dart';
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import 'package:path_provider/path_provider.dart';
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import 'package:photo_manager/photo_manager.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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import 'package:dio/dio.dart';
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import 'package:path/path.dart';
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import 'package:photos/models/photo.dart';
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import 'package:photos/core/configuration.dart';
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import 'package:photos/events/remote_sync_event.dart';
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class PhotoSyncManager {
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final _logger = Logger("PhotoSyncManager");
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final _dio = Dio();
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final _db = PhotoDB.instance;
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bool _isSyncInProgress = false;
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Future<void> _existingSync;
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static final _lastSyncTimestampKey = "last_sync_timestamp_0";
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static final _lastDBUpdateTimestampKey = "last_db_update_timestamp";
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static final _diffLimit = 100;
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PhotoSyncManager._privateConstructor() {
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Bus.instance.on<UserAuthenticatedEvent>().listen((event) {
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sync();
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});
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}
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static final PhotoSyncManager instance =
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PhotoSyncManager._privateConstructor();
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Future<void> sync() async {
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if (_isSyncInProgress) {
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_logger.warning("Sync already in progress, skipping.");
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return _existingSync;
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}
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_isSyncInProgress = true;
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_existingSync = Future<void>(() async {
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_logger.info("Syncing...");
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try {
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await _doSync();
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} catch (e) {
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throw e;
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} finally {
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_isSyncInProgress = false;
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}
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});
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return _existingSync;
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}
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Future<bool> hasScannedDisk() async {
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final prefs = await SharedPreferences.getInstance();
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return prefs.containsKey(_lastDBUpdateTimestampKey);
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}
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Future<void> _doSync() async {
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final prefs = await SharedPreferences.getInstance();
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final syncStartTimestamp = DateTime.now().microsecondsSinceEpoch;
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var lastDBUpdateTimestamp = prefs.getInt(_lastDBUpdateTimestampKey);
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if (lastDBUpdateTimestamp == null) {
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lastDBUpdateTimestamp = 0;
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await _initializeDirectories();
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}
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await PhotoProvider.instance
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.refreshGalleryList(lastDBUpdateTimestamp, syncStartTimestamp);
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final pathEntities = PhotoProvider.instance.list;
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final photos = List<Photo>();
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AssetPathEntity recents;
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for (AssetPathEntity pathEntity in pathEntities) {
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if (pathEntity.name == "Recent" || pathEntity.name == "Recents") {
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recents = pathEntity;
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} else {
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await _addToPhotos(pathEntity, lastDBUpdateTimestamp, photos);
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}
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}
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if (recents != null) {
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await _addToPhotos(recents, lastDBUpdateTimestamp, photos);
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}
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if (photos.isNotEmpty) {
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photos.sort((first, second) =>
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first.createTimestamp.compareTo(second.createTimestamp));
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await _updateDatabase(
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photos, prefs, lastDBUpdateTimestamp, syncStartTimestamp);
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}
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await _syncWithRemote(prefs);
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}
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Future _addToPhotos(AssetPathEntity pathEntity, int lastDBUpdateTimestamp,
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List<Photo> photos) async {
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final assetList = await pathEntity.assetList;
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for (AssetEntity entity in assetList) {
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if (max(entity.createDateTime.microsecondsSinceEpoch,
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entity.modifiedDateTime.microsecondsSinceEpoch) >
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lastDBUpdateTimestamp) {
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try {
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final photo = await Photo.fromAsset(pathEntity, entity);
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if (!photos.contains(photo)) {
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photos.add(photo);
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}
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} catch (e) {
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_logger.severe(e);
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}
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}
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}
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}
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Future<void> _syncWithRemote(SharedPreferences prefs) async {
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// TODO: Fix race conditions triggered due to concurrent syncs.
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// Add device_id/last_sync_timestamp to the upload request?
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if (!Configuration.instance.hasConfiguredAccount()) {
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return Future.error("Account not configured yet");
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}
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await _downloadDiff(prefs);
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await _uploadDiff(prefs);
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await _deletePhotosOnServer();
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}
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Future<bool> _updateDatabase(
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final List<Photo> photos,
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SharedPreferences prefs,
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int lastDBUpdateTimestamp,
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int syncStartTimestamp) async {
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var photosToBeAdded = List<Photo>();
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for (Photo photo in photos) {
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if (photo.createTimestamp > lastDBUpdateTimestamp) {
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photosToBeAdded.add(photo);
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}
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}
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return await _insertPhotosToDB(photosToBeAdded, prefs, syncStartTimestamp);
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}
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Future<void> _downloadDiff(SharedPreferences prefs) async {
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int lastSyncTimestamp = _getLastSyncTimestamp(prefs);
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var diff = await _getDiff(lastSyncTimestamp, _diffLimit);
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if (diff != null && diff.isNotEmpty) {
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await _storeDiff(diff, prefs);
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PhotoRepository.instance.reloadPhotos();
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if (diff.length == _diffLimit) {
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return await _downloadDiff(prefs);
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}
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}
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}
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int _getLastSyncTimestamp(SharedPreferences prefs) {
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var lastSyncTimestamp = prefs.getInt(_lastSyncTimestampKey);
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if (lastSyncTimestamp == null) {
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lastSyncTimestamp = 0;
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}
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return lastSyncTimestamp;
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}
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Future<void> _uploadDiff(SharedPreferences prefs) async {
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List<Photo> photosToBeUploaded = await _db.getPhotosToBeUploaded();
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for (int i = 0; i < photosToBeUploaded.length; i++) {
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Photo photo = photosToBeUploaded[i];
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_logger.info("Uploading " + photo.toString());
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try {
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var uploadedPhoto = await _uploadFile(photo);
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await _db.updatePhoto(photo.generatedId, uploadedPhoto.uploadedFileId,
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uploadedPhoto.remotePath, uploadedPhoto.updateTimestamp);
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prefs.setInt(_lastSyncTimestampKey, uploadedPhoto.updateTimestamp);
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Bus.instance.fire(PhotoUploadEvent(
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completed: i + 1, total: photosToBeUploaded.length));
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} catch (e) {
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Bus.instance.fire(PhotoUploadEvent(hasError: true));
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throw e;
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}
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}
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}
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Future _storeDiff(List<Photo> diff, SharedPreferences prefs) async {
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for (Photo photo in diff) {
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try {
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var existingPhoto = await _db.getMatchingPhoto(photo.localId,
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photo.title, photo.deviceFolder, photo.createTimestamp);
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await _db.updatePhoto(existingPhoto.generatedId, photo.uploadedFileId,
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photo.remotePath, photo.updateTimestamp, photo.thumbnailPath);
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} catch (e) {
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await _db.insertPhoto(photo);
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}
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await prefs.setInt(_lastSyncTimestampKey, photo.updateTimestamp);
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}
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}
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Future<List<Photo>> _getDiff(int lastSyncTimestamp, int limit) async {
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Response response = await _dio.get(
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Configuration.instance.getHttpEndpoint() + "/files/diff",
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options:
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Options(headers: {"X-Auth-Token": Configuration.instance.getToken()}),
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queryParameters: {
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"sinceTimestamp": lastSyncTimestamp,
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"limit": limit,
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},
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).catchError((e) => _logger.severe(e));
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if (response != null) {
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Bus.instance.fire(RemoteSyncEvent(true));
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return (response.data["diff"] as List)
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.map((photo) => new Photo.fromJson(photo))
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.toList();
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} else {
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Bus.instance.fire(RemoteSyncEvent(false));
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return null;
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}
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}
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Future<Photo> _uploadFile(Photo localPhoto) async {
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var title = extension(localPhoto.title) == ".HEIC"
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? basenameWithoutExtension(localPhoto.title) + ".JPG"
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: localPhoto.title;
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var formData = FormData.fromMap({
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"file": MultipartFile.fromBytes((await localPhoto.getBytes()),
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filename: title),
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"deviceFileID": localPhoto.localId,
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"deviceFolder": localPhoto.deviceFolder,
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"title": title,
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"createTimestamp": localPhoto.createTimestamp,
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});
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return _dio
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.post(
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Configuration.instance.getHttpEndpoint() + "/files",
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options:
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Options(headers: {"X-Auth-Token": Configuration.instance.getToken()}),
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data: formData,
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)
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.then((response) {
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return Photo.fromJson(response.data);
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});
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}
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Future<void> _deletePhotosOnServer() async {
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return _db.getAllDeletedPhotos().then((deletedPhotos) async {
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for (Photo deletedPhoto in deletedPhotos) {
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await _deletePhotoOnServer(deletedPhoto);
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await _db.deletePhoto(deletedPhoto);
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}
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});
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}
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Future<void> _deletePhotoOnServer(Photo photo) async {
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return _dio
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.delete(
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Configuration.instance.getHttpEndpoint() +
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"/files/" +
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photo.uploadedFileId.toString(),
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options: Options(
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headers: {"X-Auth-Token": Configuration.instance.getToken()}),
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)
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.catchError((e) => _logger.severe(e));
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}
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Future _initializeDirectories() async {
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var externalPath = (await getApplicationDocumentsDirectory()).path;
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new Directory(externalPath + "/photos/thumbnails")
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.createSync(recursive: true);
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}
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Future<bool> _insertPhotosToDB(
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List<Photo> photos, SharedPreferences prefs, int timestamp) async {
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await _db.insertPhotos(photos);
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_logger.info("Inserted " + photos.length.toString() + " photos.");
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PhotoRepository.instance.reloadPhotos();
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return await prefs.setInt(_lastDBUpdateTimestampKey, timestamp);
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}
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}
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