selfprivacy.org.app/lib/logic/get_it/api_connection_repository.dart

251 lines
7.4 KiB
Dart
Raw Normal View History

import 'dart:async';
import 'package:hive/hive.dart';
import 'package:pub_semver/pub_semver.dart';
import 'package:selfprivacy/config/get_it_config.dart';
import 'package:selfprivacy/config/hive_config.dart';
import 'package:selfprivacy/logic/api_maps/graphql_maps/server_api/server_api.dart';
import 'package:selfprivacy/logic/models/backup.dart';
import 'package:selfprivacy/logic/models/hive/server_details.dart';
import 'package:selfprivacy/logic/models/hive/server_domain.dart';
import 'package:selfprivacy/logic/models/json/server_job.dart';
import 'package:selfprivacy/logic/models/service.dart';
/// Repository for all API calls
/// Stores the current state of all data from API and exposes it to Blocs.
class ApiConnectionRepository {
Box box = Hive.box(BNames.serverInstallationBox);
final ServerApi api = ServerApi();
final ApiData _apiData = ApiData(ServerApi());
ApiData get apiData => _apiData;
ConnectionStatus connectionStatus = ConnectionStatus.nonexistent;
final _dataStream = StreamController<ApiData>.broadcast();
final _connectionStatusStream =
StreamController<ConnectionStatus>.broadcast();
Stream<ApiData> get dataStream => _dataStream.stream;
Stream<ConnectionStatus> get connectionStatusStream =>
_connectionStatusStream.stream;
ConnectionStatus get currentConnectionStatus => connectionStatus;
Timer? _timer;
Future<void> removeServerJob(final String uid) async {
await api.removeApiJob(uid);
_apiData.serverJobs.data
?.removeWhere((final ServerJob element) => element.uid == uid);
_dataStream.add(_apiData);
}
Future<void> removeAllFinishedServerJobs() async {
final List<ServerJob> finishedJobs = _apiData.serverJobs.data
?.where(
(final ServerJob element) =>
element.status == JobStatusEnum.finished ||
element.status == JobStatusEnum.error,
)
.toList() ??
[];
// Optimistically remove the jobs from the list
_apiData.serverJobs.data?.removeWhere(
(final ServerJob element) =>
element.status == JobStatusEnum.finished ||
element.status == JobStatusEnum.error,
);
_dataStream.add(_apiData);
await Future.forEach<ServerJob>(
finishedJobs,
(final ServerJob job) async => removeServerJob(job.uid),
);
}
void dispose() {
_dataStream.close();
_connectionStatusStream.close();
_timer?.cancel();
}
ServerHostingDetails? get serverDetails =>
getIt<ApiConfigModel>().serverDetails;
ServerDomain? get serverDomain => getIt<ApiConfigModel>().serverDomain;
void init() async {
final serverDetails = getIt<ApiConfigModel>().serverDetails;
final hasFinalChecked =
box.get(BNames.hasFinalChecked, defaultValue: false);
if (serverDetails == null || !hasFinalChecked) {
return;
}
connectionStatus = ConnectionStatus.reconnecting;
_connectionStatusStream.add(connectionStatus);
final String? apiVersion = await api.getApiVersion();
if (apiVersion == null) {
connectionStatus = ConnectionStatus.offline;
_connectionStatusStream.add(connectionStatus);
return;
} else {
_apiData.apiVersion.data = apiVersion;
_dataStream.add(_apiData);
}
_apiData.serverJobs.data = await api.getServerJobs();
_apiData.backupConfig.data = await api.getBackupsConfiguration();
_apiData.backups.data = await api.getBackups();
_apiData.services.data = await api.getAllServices();
_dataStream.add(_apiData);
connectionStatus = ConnectionStatus.connected;
_connectionStatusStream.add(connectionStatus);
// Use timer to periodically check for new jobs
_timer = Timer.periodic(
const Duration(seconds: 10),
reload,
);
}
Future<void> reload(final Timer? timer) async {
final serverDetails = getIt<ApiConfigModel>().serverDetails;
if (serverDetails == null) {
return;
}
final String? apiVersion = await api.getApiVersion();
if (apiVersion == null) {
connectionStatus = ConnectionStatus.offline;
_connectionStatusStream.add(connectionStatus);
return;
} else {
connectionStatus = ConnectionStatus.connected;
_connectionStatusStream.add(connectionStatus);
_apiData.apiVersion.data = apiVersion;
}
final Version version = Version.parse(apiVersion);
await _apiData.serverJobs
.refetchData(version, () => _dataStream.add(_apiData));
await _apiData.backups
.refetchData(version, () => _dataStream.add(_apiData));
await _apiData.backupConfig
.refetchData(version, () => _dataStream.add(_apiData));
await _apiData.services
.refetchData(version, () => _dataStream.add(_apiData));
}
void emitData() {
_dataStream.add(_apiData);
}
}
class ApiData {
ApiData(final ServerApi api)
: apiVersion = ApiDataElement<String>(
fetchData: () async => api.getApiVersion(),
),
serverJobs = ApiDataElement<List<ServerJob>>(
fetchData: () async => api.getServerJobs(),
ttl: 10,
),
backupConfig = ApiDataElement<BackupConfiguration>(
fetchData: () async => api.getBackupsConfiguration(),
requiredApiVersion: '>=2.4.2',
),
backups = ApiDataElement<List<Backup>>(
fetchData: () async => api.getBackups(),
requiredApiVersion: '>=2.4.2',
),
services = ApiDataElement<List<Service>>(
fetchData: () async => api.getAllServices(),
requiredApiVersion: '>=2.4.3',
);
ApiDataElement<List<ServerJob>> serverJobs;
ApiDataElement<String> apiVersion;
ApiDataElement<BackupConfiguration> backupConfig;
ApiDataElement<List<Backup>> backups;
ApiDataElement<List<Service>> services;
}
enum ConnectionStatus {
nonexistent,
connected,
reconnecting,
offline,
unauthorized,
}
class ApiDataElement<T> {
ApiDataElement({
required this.fetchData,
final T? data,
this.requiredApiVersion = '>=2.3.0',
this.ttl = 60,
}) : _data = data,
_lastUpdated = DateTime.now();
T? _data;
final String requiredApiVersion;
final Future<T?> Function() fetchData;
Future<void> refetchData(
final Version version,
final Function callback,
) async {
if (VersionConstraint.parse(requiredApiVersion).allows(version)) {
print('Fetching data for $runtimeType');
if (isExpired) {
print('Data is expired');
final newData = await fetchData();
print(newData);
if (T is List) {
if (Object.hashAll(newData as Iterable<Object?>) !=
Object.hashAll(_data as Iterable<Object?>)) {
_data = [...newData] as T?;
}
} else {
if (newData.hashCode != _data.hashCode) {
_data = newData;
}
}
callback();
}
}
}
/// TTL of the data in seconds
final int ttl;
Type get type => T;
void invalidate() {
_lastUpdated = DateTime.fromMillisecondsSinceEpoch(0);
}
/// Timestamp of when the data was last updated
DateTime _lastUpdated;
bool get isExpired {
final now = DateTime.now();
final difference = now.difference(_lastUpdated);
return difference.inSeconds > ttl;
}
T? get data => _data;
/// Sets the data and updates the lastUpdated timestamp
set data(final T? data) {
_data = data;
_lastUpdated = DateTime.now();
}
/// Returns the last time the data was updated
DateTime get lastUpdated => _lastUpdated;
}