* Add login exception on authentication failed

* Add example

CHANGELOG.md

@@ -1,4 +1,9 @@
-## 0.0.9
+## 0.0.11
+
+* Add login exception on authentication failed
+* Add example
+
+## 0.0.10
 
 * Fix http dependency again
 

example/example.dart

@@ -0,0 +1,40 @@
+import 'package:rocket_chat_connector_flutter/models/channel.dart';
+import 'package:rocket_chat_connector_flutter/models/channel_counters.dart';
+import 'package:rocket_chat_connector_flutter/models/channel_messages.dart';
+import 'package:rocket_chat_connector_flutter/models/filters/channel_counters_filter.dart';
+import 'package:rocket_chat_connector_flutter/models/filters/channel_history_filter.dart';
+import 'package:rocket_chat_connector_flutter/models/new/message_new.dart';
+import 'package:rocket_chat_connector_flutter/models/response/message_new_response.dart';
+import 'package:rocket_chat_connector_flutter/services/authentication_service.dart';
+import 'package:rocket_chat_connector_flutter/services/channel_service.dart';
+import 'package:rocket_chat_connector_flutter/services/http_service.dart' as rocket_http_service;
+import 'package:rocket_chat_connector_flutter/services/message_service.dart';
+
+final String serverUrl = "myServerUrl";
+final String username = "myUserName";
+final String password = "myPassword";
+final Channel channel = Channel(id: "myChannelId");
+
+final rocket_http_service.HttpService rocketHttpService = rocket_http_service.HttpService(serverUrl);
+final AuthenticationService authenticationService = AuthenticationService(rocketHttpService);
+final ChannelService channelService = ChannelService(rocketHttpService);
+final MessageService messageService = MessageService(rocketHttpService);
+
+Future main(List<String> args) async {
+  rocket_http_service.HttpService.authentication = await authenticationService.login(username, password);
+
+  // get channel message counter
+  ChannelCountersFilter filter = ChannelCountersFilter(channel);
+  ChannelCounters counters = await channelService.counters(filter);
+  print("Channel have ${counters.unreads} unread messages");
+
+  // get channel message list
+  ChannelHistoryFilter channelHistoryFilter = ChannelHistoryFilter(channel, count: 50);
+  ChannelMessages channelMessages = await channelService.history(channelHistoryFilter);
+  print("Last message : ${channelMessages.messages.first.ts} : ${channelMessages.messages.first.msg}");
+
+  // send message
+  MessageNew messageNew = MessageNew(roomId: channel.id, text: "my message");
+  MessageNewResponse response = await messageService.postMessage(messageNew);
+  print("Message send success : ${response.success}");
+}

lib/exceptions/login_exception.dart

@@ -0,0 +1,9 @@
+class LoginException implements Exception {
+  String message;
+  LoginException(this.message);
+
+  String toString() {
+    if (message == null) return "LoginException";
+    return "LoginException: $message";
+  }
+}

lib/services/authentication_service.dart

@@ -1,6 +1,7 @@
 import 'dart:convert';
 
 import 'package:http/http.dart' as http;
+import 'package:rocket_chat_connector_flutter/exceptions/login_exception.dart';
 import 'package:rocket_chat_connector_flutter/models/authentication.dart';
 import 'package:rocket_chat_connector_flutter/models/user.dart';
 import 'package:rocket_chat_connector_flutter/services/http_service.dart';
@@ -18,7 +19,7 @@ class AuthenticationService {
     if (response?.statusCode == 200 && response.body?.isNotEmpty == true) {
       return Authentication.fromMap(jsonDecode(response.body));
     }
-    return null;
+    throw LoginException("Rocket chat authentication failed");
   }
 
   Future<User> me() async {

pubspec.yaml

@@ -1,7 +1,7 @@
 name: rocket_chat_connector_flutter
 description: Flutter Rocket.chat connector. This library is developed to allow the use of a Rocket.chat server as a messaging system.
 homepage: https://github.com/sdugene/rocket-chat-connector-flutter
-version: 0.0.10
+version: 0.0.11
 
 environment:
   sdk: ">=2.1.0 <3.0.0"