selfprivacy.org.app/lib/logic/bloc/backups/backups_bloc.dart

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import 'dart:async';
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import 'package:bloc_concurrency/bloc_concurrency.dart';
import 'package:easy_localization/easy_localization.dart';
import 'package:equatable/equatable.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:selfprivacy/config/get_it_config.dart';
import 'package:selfprivacy/logic/api_maps/rest_maps/backblaze.dart';
import 'package:selfprivacy/logic/get_it/resources_model.dart';
import 'package:selfprivacy/logic/models/backup.dart';
import 'package:selfprivacy/logic/models/hive/backblaze_bucket.dart';
import 'package:selfprivacy/logic/models/hive/backups_credential.dart';
import 'package:selfprivacy/logic/models/initialize_repository_input.dart';
import 'package:selfprivacy/logic/models/json/server_job.dart';
import 'package:selfprivacy/logic/models/service.dart';
part 'backups_event.dart';
part 'backups_state.dart';
class BackupsBloc extends Bloc<BackupsEvent, BackupsState> {
BackupsBloc() : super(BackupsInitial()) {
on<BackupsServerLoaded>(
_loadState,
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transformer: droppable(),
);
on<BackupsServerReset>(
_resetState,
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transformer: droppable(),
);
on<BackupsStateChanged>(
_updateState,
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transformer: droppable(),
);
on<InitializeBackupsRepository>(
_initializeRepository,
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transformer: droppable(),
);
on<ForceSnapshotListUpdate>(
_forceSnapshotListUpdate,
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transformer: droppable(),
);
on<CreateBackups>(
_createBackups,
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transformer: sequential(),
);
on<RestoreBackup>(
_restoreBackup,
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transformer: sequential(),
);
on<SetAutobackupPeriod>(
_setAutobackupPeriod,
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transformer: restartable(),
);
on<SetAutobackupQuotas>(
_setAutobackupQuotas,
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transformer: restartable(),
);
on<ForgetSnapshot>(
_forgetSnapshot,
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transformer: sequential(),
);
final connectionRepository = getIt<ApiConnectionRepository>();
_apiStatusSubscription = connectionRepository.connectionStatusStream
.listen((final ConnectionStatus connectionStatus) {
switch (connectionStatus) {
case ConnectionStatus.nonexistent:
add(const BackupsServerReset());
isLoaded = false;
break;
case ConnectionStatus.connected:
if (!isLoaded) {
add(const BackupsServerLoaded());
isLoaded = true;
}
break;
default:
break;
}
});
_apiDataSubscription = connectionRepository.dataStream.listen(
(final ApiData apiData) {
if (apiData.backups.data == null || apiData.backupConfig.data == null) {
add(const BackupsServerReset());
isLoaded = false;
} else {
add(
BackupsStateChanged(
apiData.backups.data!,
apiData.backupConfig.data,
),
);
isLoaded = true;
}
},
);
if (connectionRepository.connectionStatus == ConnectionStatus.connected) {
add(const BackupsServerLoaded());
isLoaded = true;
}
}
final BackblazeApi backblaze = BackblazeApi();
Future<void> _loadState(
final BackupsServerLoaded event,
final Emitter<BackupsState> emit,
) async {
BackblazeBucket? bucket = getIt<ResourcesModel>().backblazeBucket;
final backups = getIt<ApiConnectionRepository>().apiData.backups;
final backupConfig = getIt<ApiConnectionRepository>().apiData.backupConfig;
if (backupConfig.data == null || backups.data == null) {
emit(BackupsLoading());
return;
}
if (bucket != null &&
backupConfig.data!.encryptionKey != bucket.encryptionKey) {
bucket = bucket.copyWith(
encryptionKey: backupConfig.data!.encryptionKey,
);
await getIt<ApiConfigModel>().setBackblazeBucket(bucket);
}
if (backupConfig.data!.isInitialized) {
emit(
BackupsInitialized(
backblazeBucket: bucket,
backupConfig: backupConfig.data,
backups: backups.data ?? [],
),
);
} else {
emit(BackupsUnititialized());
}
}
Future<void> _resetState(
final BackupsServerReset event,
final Emitter<BackupsState> emit,
) async {
emit(BackupsInitial());
}
Future<void> _initializeRepository(
final InitializeBackupsRepository event,
final Emitter<BackupsState> emit,
) async {
if (state is! BackupsUnititialized) {
return;
}
emit(BackupsInitializing());
final String? encryptionKey = getIt<ApiConnectionRepository>()
.apiData
.backupConfig
.data
?.encryptionKey;
if (encryptionKey == null) {
emit(BackupsUnititialized());
getIt<NavigationService>()
.showSnackBar("Couldn't get encryption key from your server.");
return;
}
final BackblazeBucket bucket;
if (state.backblazeBucket == null) {
final String domain = getIt<ApiConnectionRepository>()
.serverDomain!
.domainName
.replaceAll(RegExp(r'[^a-zA-Z0-9]'), '-');
final int serverId = getIt<ApiConnectionRepository>().serverDetails!.id;
String bucketName =
'${DateTime.now().millisecondsSinceEpoch}-$serverId-$domain';
if (bucketName.length > 49) {
bucketName = bucketName.substring(0, 49);
}
final String bucketId = await backblaze.createBucket(bucketName);
final BackblazeApplicationKey key = await backblaze.createKey(bucketId);
bucket = BackblazeBucket(
bucketId: bucketId,
bucketName: bucketName,
applicationKey: key.applicationKey,
applicationKeyId: key.applicationKeyId,
encryptionKey: encryptionKey,
);
await getIt<ApiConfigModel>().setBackblazeBucket(bucket);
emit(state.copyWith(backblazeBucket: bucket));
} else {
bucket = state.backblazeBucket!;
}
final GenericResult result =
await getIt<ApiConnectionRepository>().api.initializeRepository(
InitializeRepositoryInput(
provider: BackupsProviderType.backblaze,
locationId: bucket.bucketId,
locationName: bucket.bucketName,
login: bucket.applicationKeyId,
password: bucket.applicationKey,
),
);
if (result.success == false) {
getIt<NavigationService>().showSnackBar(
result.message ?? "Couldn't initialize repository on your server.",
);
emit(BackupsUnititialized());
return;
}
getIt<ApiConnectionRepository>().apiData.backupConfig.invalidate();
getIt<ApiConnectionRepository>().apiData.backups.invalidate();
await getIt<ApiConnectionRepository>().reload(null);
getIt<NavigationService>().showSnackBar(
'Backups repository is now initializing. It may take a while.',
);
}
Future<void> _updateState(
final BackupsStateChanged event,
final Emitter<BackupsState> emit,
) async {
if (event.backupConfiguration == null ||
event.backupConfiguration!.isInitialized == false) {
emit(BackupsUnititialized());
return;
}
final BackblazeBucket? bucket = getIt<ResourcesModel>().backblazeBucket;
emit(
BackupsInitialized(
backblazeBucket: bucket,
backupConfig: event.backupConfiguration,
backups: event.backups,
),
);
}
Future<void> _forceSnapshotListUpdate(
final ForceSnapshotListUpdate event,
final Emitter<BackupsState> emit,
) async {
final currentState = state;
if (currentState is BackupsInitialized) {
emit(BackupsBusy.fromState(currentState));
getIt<NavigationService>().showSnackBar('backup.refetching_list'.tr());
await getIt<ApiConnectionRepository>().api.forceBackupListReload();
getIt<ApiConnectionRepository>().apiData.backups.invalidate();
emit(currentState);
}
}
Future<void> _createBackups(
final CreateBackups event,
final Emitter<BackupsState> emit,
) async {
final currentState = state;
if (currentState is BackupsInitialized) {
emit(BackupsBusy.fromState(currentState));
for (final service in event.services) {
final GenericResult<ServerJob?> result =
await getIt<ApiConnectionRepository>().api.startBackup(
service.id,
);
if (result.success == false) {
getIt<NavigationService>()
.showSnackBar(result.message ?? 'Unknown error');
}
if (result.data != null) {
getIt<ApiConnectionRepository>()
.apiData
.serverJobs
.data
?.add(result.data!);
}
}
emit(currentState);
getIt<ApiConnectionRepository>().emitData();
}
}
Future<void> _restoreBackup(
final RestoreBackup event,
final Emitter<BackupsState> emit,
) async {
final currentState = state;
if (currentState is BackupsInitialized) {
emit(BackupsBusy.fromState(currentState));
final GenericResult result =
await getIt<ApiConnectionRepository>().api.restoreBackup(
event.backupId,
event.restoreStrategy,
);
if (result.success == false) {
getIt<NavigationService>()
.showSnackBar(result.message ?? 'Unknown error');
}
emit(currentState);
}
}
Future<void> _setAutobackupPeriod(
final SetAutobackupPeriod event,
final Emitter<BackupsState> emit,
) async {
final currentState = state;
if (currentState is BackupsInitialized) {
emit(BackupsBusy.fromState(currentState));
final GenericResult result =
await getIt<ApiConnectionRepository>().api.setAutobackupPeriod(
period: event.period?.inMinutes,
);
if (result.success == false) {
getIt<NavigationService>()
.showSnackBar(result.message ?? 'Unknown error');
}
if (result.success == true) {
getIt<ApiConnectionRepository>().apiData.backupConfig.data =
getIt<ApiConnectionRepository>()
.apiData
.backupConfig
.data
?.copyWith(
autobackupPeriod: event.period,
);
}
emit(currentState);
getIt<ApiConnectionRepository>().emitData();
}
}
Future<void> _setAutobackupQuotas(
final SetAutobackupQuotas event,
final Emitter<BackupsState> emit,
) async {
final currentState = state;
if (currentState is BackupsInitialized) {
emit(BackupsBusy.fromState(currentState));
final GenericResult result =
await getIt<ApiConnectionRepository>().api.setAutobackupQuotas(
event.quotas,
);
if (result.success == false) {
getIt<NavigationService>()
.showSnackBar(result.message ?? 'Unknown error');
}
if (result.success == true) {
getIt<ApiConnectionRepository>().apiData.backupConfig.data =
getIt<ApiConnectionRepository>()
.apiData
.backupConfig
.data
?.copyWith(
autobackupQuotas: event.quotas,
);
}
emit(currentState);
getIt<ApiConnectionRepository>().emitData();
}
}
Future<void> _forgetSnapshot(
final ForgetSnapshot event,
final Emitter<BackupsState> emit,
) async {
final currentState = state;
if (currentState is BackupsInitialized) {
// Optimistically remove the snapshot from the list
getIt<ApiConnectionRepository>().apiData.backups.data =
getIt<ApiConnectionRepository>()
.apiData
.backups
.data
?.where((final Backup backup) => backup.id != event.backupId)
.toList();
emit(BackupsBusy.fromState(currentState));
final GenericResult result =
await getIt<ApiConnectionRepository>().api.forgetSnapshot(
event.backupId,
);
if (result.success == false) {
getIt<NavigationService>()
.showSnackBar(result.message ?? 'jobs.generic_error'.tr());
} else if (result.data == false) {
getIt<NavigationService>()
.showSnackBar('backup.forget_snapshot_error'.tr());
}
emit(currentState);
}
}
@override
Future<void> close() {
_apiStatusSubscription.cancel();
_apiDataSubscription.cancel();
return super.close();
}
@override
void onChange(final Change<BackupsState> change) {
super.onChange(change);
}
late StreamSubscription _apiStatusSubscription;
late StreamSubscription _apiDataSubscription;
bool isLoaded = false;
}