122 lines
4.5 KiB
Dart
122 lines
4.5 KiB
Dart
import 'dart:convert';
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import 'dart:math';
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import 'package:logging/logging.dart';
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import 'package:photos/core/network/network.dart';
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import 'package:photos/db/files_db.dart';
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import 'package:photos/models/file/file.dart';
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import "package:photos/models/metadata/file_magic.dart";
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import 'package:photos/utils/crypto_util.dart';
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import 'package:photos/utils/file_download_util.dart';
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class DiffFetcher {
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final _logger = Logger("DiffFetcher");
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final _enteDio = NetworkClient.instance.enteDio;
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Future<Diff> getEncryptedFilesDiff(int collectionID, int sinceTime) async {
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try {
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final response = await _enteDio.get(
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"/collections/v2/diff",
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queryParameters: {
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"collectionID": collectionID,
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"sinceTime": sinceTime,
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},
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);
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int latestUpdatedAtTime = 0;
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final diff = response.data["diff"] as List;
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final bool hasMore = response.data["hasMore"] as bool;
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final startTime = DateTime.now();
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late Set<int> existingUploadIDs;
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if (diff.isNotEmpty) {
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existingUploadIDs =
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await FilesDB.instance.getUploadedFileIDs(collectionID);
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}
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final deletedFiles = <EnteFile>[];
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final updatedFiles = <EnteFile>[];
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for (final item in diff) {
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final file = EnteFile();
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file.uploadedFileID = item["id"];
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file.collectionID = item["collectionID"];
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file.updationTime = item["updationTime"];
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latestUpdatedAtTime = max(latestUpdatedAtTime, file.updationTime!);
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if (item["isDeleted"]) {
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if (existingUploadIDs.contains(file.uploadedFileID)) {
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deletedFiles.add(file);
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}
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continue;
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}
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if (existingUploadIDs.contains(file.uploadedFileID)) {
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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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file.generatedID = existingFile.generatedID;
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file.addedTime = existingFile.addedTime;
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}
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}
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file.ownerID = item["ownerID"];
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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 = item["thumbnail"]["decryptionHeader"];
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file.metadataDecryptionHeader = item["metadata"]["decryptionHeader"];
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if (item["info"] != null) {
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file.fileSize = item["info"]["fileSize"];
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}
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final fileKey = getFileKey(file);
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final encodedMetadata = await CryptoUtil.decryptChaCha(
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CryptoUtil.base642bin(item["metadata"]["encryptedData"]),
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fileKey,
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CryptoUtil.base642bin(file.metadataDecryptionHeader!),
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);
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final Map<String, dynamic> metadata =
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jsonDecode(utf8.decode(encodedMetadata));
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file.applyMetadata(metadata);
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if (item['magicMetadata'] != null) {
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final utfEncodedMmd = await CryptoUtil.decryptChaCha(
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CryptoUtil.base642bin(item['magicMetadata']['data']),
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fileKey,
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CryptoUtil.base642bin(item['magicMetadata']['header']),
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);
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file.mMdEncodedJson = utf8.decode(utfEncodedMmd);
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file.mMdVersion = item['magicMetadata']['version'];
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file.magicMetadata =
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MagicMetadata.fromEncodedJson(file.mMdEncodedJson!);
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}
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if (item['pubMagicMetadata'] != null) {
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final utfEncodedMmd = await CryptoUtil.decryptChaCha(
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CryptoUtil.base642bin(item['pubMagicMetadata']['data']),
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fileKey,
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CryptoUtil.base642bin(item['pubMagicMetadata']['header']),
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);
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file.pubMmdEncodedJson = utf8.decode(utfEncodedMmd);
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file.pubMmdVersion = item['pubMagicMetadata']['version'];
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file.pubMagicMetadata =
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PubMagicMetadata.fromEncodedJson(file.pubMmdEncodedJson!);
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}
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updatedFiles.add(file);
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}
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_logger.info('[Collection-$collectionID] parsed ${diff.length} '
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'diff items ( ${updatedFiles.length} updated) in ${DateTime.now().difference(startTime).inMilliseconds}ms');
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return Diff(updatedFiles, deletedFiles, hasMore, latestUpdatedAtTime);
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} catch (e, s) {
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_logger.severe(e, s);
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rethrow;
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}
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}
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}
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class Diff {
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final List<EnteFile> updatedFiles;
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final List<EnteFile> deletedFiles;
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final bool hasMore;
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final int latestUpdatedAtTime;
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Diff(
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this.updatedFiles,
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this.deletedFiles,
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this.hasMore,
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this.latestUpdatedAtTime,
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);
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}
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