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