OpenContacts/lib/clients/api_client.dart
2023-05-25 19:30:15 +02:00

196 lines
7.2 KiB
Dart

import 'dart:async';
import 'dart:convert';
import 'package:flutter/foundation.dart';
import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:http/http.dart' as http;
import 'package:contacts_plus_plus/models/authentication_data.dart';
import 'package:logging/logging.dart';
import 'package:uuid/uuid.dart';
import '../config.dart';
class ApiClient {
static const String totpKey = "TOTP";
static const String userIdKey = "userId";
static const String machineIdKey = "machineId";
static const String tokenKey = "token";
static const String passwordKey = "password";
ApiClient({required AuthenticationData authenticationData, required this.onLogout}) : _authenticationData = authenticationData;
final AuthenticationData _authenticationData;
final Logger _logger = Logger("API");
// Saving the context here feels kinda cringe ngl
final Function() onLogout;
AuthenticationData get authenticationData => _authenticationData;
String get userId => _authenticationData.userId;
bool get isAuthenticated => _authenticationData.isAuthenticated;
static Future<AuthenticationData> tryLogin({
required String username,
required String password,
bool rememberMe=true,
bool rememberPass=true,
String? oneTimePad,
}) async {
final body = {
(username.contains("@") ? "email" : "username"): username.trim(),
"password": password,
"rememberMe": rememberMe,
"secretMachineId": const Uuid().v4(),
};
final response = await http.post(
buildFullUri("/UserSessions"),
headers: {
"Content-Type": "application/json",
if (oneTimePad != null) totpKey : oneTimePad,
},
body: jsonEncode(body),
);
if (response.statusCode == 403 && response.body == totpKey) {
throw totpKey;
}
if (response.statusCode == 400) {
throw "Invalid Credentials";
}
checkResponseCode(response);
final authData = AuthenticationData.fromMap(jsonDecode(response.body));
if (authData.isAuthenticated) {
const FlutterSecureStorage storage = FlutterSecureStorage(
aOptions: AndroidOptions(encryptedSharedPreferences: true),
);
await storage.write(key: userIdKey, value: authData.userId);
await storage.write(key: machineIdKey, value: authData.secretMachineId);
await storage.write(key: tokenKey, value: authData.token);
if (rememberPass) await storage.write(key: passwordKey, value: password);
}
return authData;
}
static Future<AuthenticationData> tryCachedLogin() async {
const FlutterSecureStorage storage = FlutterSecureStorage(
aOptions: AndroidOptions(encryptedSharedPreferences: true),
);
String? userId = await storage.read(key: userIdKey);
String? machineId = await storage.read(key: machineIdKey);
String? token = await storage.read(key: tokenKey);
String? password = await storage.read(key: passwordKey);
if (userId == null || machineId == null) {
return AuthenticationData.unauthenticated();
}
if (token != null) {
final response = await http.patch(buildFullUri("/userSessions"), headers: {
"Authorization": "neos $userId:$token"
});
if (response.statusCode == 200) {
return AuthenticationData(userId: userId, token: token, secretMachineId: machineId, isAuthenticated: true);
}
}
if (password != null) {
try {
userId = userId.startsWith("U-") ? userId.replaceRange(0, 2, "") : userId;
final loginResult = await tryLogin(username: userId, password: password, rememberPass: true);
if (loginResult.isAuthenticated) return loginResult;
} catch (_) {
// We don't need to notify the user if the cached login fails behind the scenes, so just ignore any exceptions.
}
}
return AuthenticationData.unauthenticated();
}
Future<void> logout() async {
const FlutterSecureStorage storage = FlutterSecureStorage(
aOptions: AndroidOptions(encryptedSharedPreferences: true),
);
await storage.delete(key: userIdKey);
await storage.delete(key: machineIdKey);
await storage.delete(key: tokenKey);
await storage.delete(key: passwordKey);
onLogout();
}
Future<void> extendSession() async {
final response = await patch("/userSessions");
if (response.statusCode != 204) {
throw "Failed to extend session.";
}
}
void checkResponse(http.Response response) {
if (response.statusCode == 403) {
tryCachedLogin().then((value) {
if (!value.isAuthenticated) {
onLogout();
}
});
}
checkResponseCode(response);
}
static void checkResponseCode(http.Response response) {
if (response.statusCode < 300) return;
final error = "${switch (response.statusCode) {
429 => "You are being rate limited.",
403 => "You are not authorized to do that.",
404 => "Resource not found.",
500 => "Internal server error.",
_ => "Unknown Error."
}} (${response.statusCode}${kDebugMode ? "|${response.body}" : ""})";
FlutterError.reportError(FlutterErrorDetails(exception: error));
throw error;
}
Map<String, String> get authorizationHeader => _authenticationData.authorizationHeader;
static Uri buildFullUri(String path) => Uri.parse("${Config.apiBaseUrl}/api$path");
Future<http.Response> get(String path, {Map<String, String>? headers}) async {
headers ??= {};
headers.addAll(authorizationHeader);
final response = await http.get(buildFullUri(path), headers: headers);
_logger.info("GET $path => ${response.statusCode}${response.statusCode >= 300 ? ": ${response.body}" : ""}");
return response;
}
Future<http.Response> post(String path, {Object? body, Map<String, String>? headers}) async {
headers ??= {};
headers["Content-Type"] = "application/json";
headers.addAll(authorizationHeader);
final response = await http.post(buildFullUri(path), headers: headers, body: body);
_logger.info("PST $path => ${response.statusCode}${response.statusCode >= 300 ? ": ${response.body}" : ""}");
return response;
}
Future<http.Response> put(String path, {Object? body, Map<String, String>? headers}) async {
headers ??= {};
headers["Content-Type"] = "application/json";
headers.addAll(authorizationHeader);
final response = await http.put(buildFullUri(path), headers: headers, body: body);
_logger.info("PUT $path => ${response.statusCode}${response.statusCode >= 300 ? ": ${response.body}" : ""}");
return response;
}
Future<http.Response> delete(String path, {Map<String, String>? headers}) async {
headers ??= {};
headers.addAll(authorizationHeader);
final response = await http.delete(buildFullUri(path), headers: headers);
_logger.info("DEL $path => ${response.statusCode}${response.statusCode >= 300 ? ": ${response.body}" : ""}");
return response;
}
Future<http.Response> patch(String path, {Object? body, Map<String, String>? headers}) async {
headers ??= {};
headers["Content-Type"] = "application/json";
headers.addAll(authorizationHeader);
final response = await http.patch(buildFullUri(path), headers: headers, body: body);
_logger.info("PAT $path => ${response.statusCode}${response.statusCode >= 300 ? ": ${response.body}" : ""}");
return response;
}
}