93 lines
3.5 KiB
Dart
93 lines
3.5 KiB
Dart
import 'dart:convert';
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import 'package:dio/dio.dart';
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import 'package:flutter_sodium/flutter_sodium.dart';
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import 'package:logging/logging.dart';
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import 'package:photos/core/configuration.dart';
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import 'package:photos/core/event_bus.dart';
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import 'package:photos/core/network.dart';
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import 'package:photos/db/files_db.dart';
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import 'package:photos/events/collection_updated_event.dart';
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import 'package:photos/events/remote_sync_event.dart';
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import 'package:photos/models/file.dart';
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import 'package:photos/repositories/file_repository.dart';
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import 'package:photos/utils/crypto_util.dart';
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import 'package:photos/utils/file_util.dart';
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class DiffFetcher {
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final _logger = Logger("FileDownloader");
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final _dio = Network.instance.getDio();
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Future<Diff> getEncryptedFilesDiff(
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int collectionID, int sinceTime, int limit) async {
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return _dio
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.get(
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Configuration.instance.getHttpEndpoint() + "/collections/diff",
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options: Options(
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headers: {"X-Auth-Token": Configuration.instance.getToken()}),
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queryParameters: {
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"collectionID": collectionID,
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"sinceTime": sinceTime,
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"limit": limit,
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},
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)
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.catchError((e) => _logger.severe(e))
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.then((response) async {
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final files = List<File>();
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if (response != null) {
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Bus.instance.fire(RemoteSyncEvent(true));
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final diff = response.data["diff"] as List;
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for (final item in diff) {
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final file = File();
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file.uploadedFileID = item["id"];
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file.collectionID = item["collectionID"];
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if (item["isDeleted"]) {
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await FilesDB.instance.deleteFromCollection(
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file.uploadedFileID, file.collectionID);
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Bus.instance.fire(
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CollectionUpdatedEvent(collectionID: file.collectionID));
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FileRepository.instance.reloadFiles();
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continue;
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}
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file.updationTime = item["updationTime"];
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final existingFile = await FilesDB.instance
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.getUploadedFile(file.uploadedFileID, file.collectionID);
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if (existingFile != null &&
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existingFile.updationTime == file.updationTime) {
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continue;
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}
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file.ownerID = item["ownerID"];
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file.isEncrypted = true;
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file.encryptedKey = item["encryptedKey"];
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file.keyDecryptionNonce = item["keyDecryptionNonce"];
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file.fileDecryptionHeader = item["file"]["decryptionHeader"];
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file.thumbnailDecryptionHeader =
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item["thumbnail"]["decryptionHeader"];
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file.metadataDecryptionHeader =
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item["metadata"]["decryptionHeader"];
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final encodedMetadata = CryptoUtil.decryptChaCha(
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Sodium.base642bin(item["metadata"]["encryptedData"]),
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decryptFileKey(file),
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Sodium.base642bin(file.metadataDecryptionHeader),
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);
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Map<String, dynamic> metadata =
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jsonDecode(utf8.decode(encodedMetadata));
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file.applyMetadata(metadata);
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files.add(file);
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}
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return Diff(files, diff.length);
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} else {
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Bus.instance.fire(RemoteSyncEvent(false));
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return Diff(List<File>(), 0);
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}
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});
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}
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}
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class Diff {
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final List<File> updatedFiles;
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final int fetchCount;
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Diff(this.updatedFiles, this.fetchCount);
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}
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