88 lines
2.7 KiB
Dart
88 lines
2.7 KiB
Dart
import 'dart:async';
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import 'dart:io';
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import 'package:logging/logging.dart';
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import 'package:photos/db/ignored_files_db.dart';
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import 'package:photos/models/file.dart';
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import 'package:photos/models/ignored_file.dart';
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class IgnoredFilesService {
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final _logger = Logger("IgnoredFilesService");
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final _db = IgnoredFilesDB.instance;
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IgnoredFilesService._privateConstructor();
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static final IgnoredFilesService instance =
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IgnoredFilesService._privateConstructor();
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Future<Set<String>> _ignoredIDs;
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Future<Set<String>> get ignoredIDs async {
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// lazily instantiate the db the first time it is accessed
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_ignoredIDs ??= _loadExistingIDs();
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return _ignoredIDs;
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}
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Future<void> cacheAndInsert(List<IgnoredFile> ignoredFiles) async {
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final existingIDs = await ignoredIDs;
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existingIDs.addAll(
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ignoredFiles
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.map((e) => _idForIgnoredFile(e))
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.where((id) => id != null)
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.toSet(),
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);
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return _db.insertMultiple(ignoredFiles);
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}
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// shouldSkipUpload takes IDs to ignore and file for which it will return
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// whether either true or false. This helper method takes ignoredIDs as input
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// to avoid making it async in nature.
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// This syntax is intentional as we want to ensure that ignoredIDs are loaded
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// from the DB before calling this method.
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bool shouldSkipUpload(Set<String> ignoredIDs, File file) {
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final id = _getIgnoreID(file.localID, file.deviceFolder, file.title);
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if (id != null && id.isNotEmpty) {
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return ignoredIDs.contains(id);
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}
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return false;
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}
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Future<Set<String>> _loadExistingIDs() async {
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_logger.fine('loading existing IDs');
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final result = await _db.getAll();
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return result
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.map((e) => _idForIgnoredFile(e))
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.where((id) => id != null)
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.toSet();
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}
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String _idForIgnoredFile(IgnoredFile ignoredFile) {
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return _getIgnoreID(
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ignoredFile.localID,
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ignoredFile.deviceFolder,
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ignoredFile.title,
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);
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}
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// _computeIgnoreID will return null if don't have sufficient information
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// to ignore the file based on the platform. Uploads from web or files shared to
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// end usually don't have local id.
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// For Android: It returns deviceFolder-title as ID for Android.
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// For iOS, it returns localID as localID is uuid and the title or deviceFolder (aka
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// album name) can be missing due to various reasons.
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String _getIgnoreID(String localID, String deviceFolder, String title) {
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// file was not uploaded from mobile device
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if (localID == null || localID.isEmpty) {
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return null;
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}
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if (Platform.isAndroid) {
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if (deviceFolder == null || title == null) {
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return null;
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}
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return '$deviceFolder-$title';
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} else {
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return localID;
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}
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}
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}
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