[IMPROVEMENT] Error messages on connect

app/i18n/locales/en.js

@@ -136,6 +136,7 @@ export default {
 	connecting_server: 'connecting to server',
 	Connecting: 'Connecting...',
 	Contact_us: 'Contact us',
+	Contact_your_server_admin: 'Contact your server admin.',
 	Continue_with: 'Continue with',
 	Copied_to_clipboard: 'Copied to clipboard!',
 	Copy: 'Copy',
@@ -257,6 +258,7 @@ export default {
 	No_Reactions: 'No Reactions',
 	No_Read_Receipts: 'No Read Receipts',
 	Not_logged: 'Not logged',
+	Not_RC_Server: 'This is not a Rocket.Chat server.\n{{contact}}',
 	Nothing: 'Nothing',
 	Nothing_to_save: 'Nothing to save!',
 	Notify_active_in_this_room: 'Notify active users in this room',
@@ -375,7 +377,7 @@ export default {
 	Tap_to_view_servers_list: 'Tap to view servers list',
 	Terms_of_Service: ' Terms of Service ',
 	Theme: 'Theme',
-	The_URL_is_invalid: 'The URL you entered is invalid. Check it and try again, please!',
+	The_URL_is_invalid: 'Invalid URL or unable to establish a secure connection.\n{{contact}}',
 	There_was_an_error_while_action: 'There was an error while {{action}}!',
 	This_room_is_blocked: 'This room is blocked',
 	This_room_is_read_only: 'This room is read only',
@@ -420,6 +422,7 @@ export default {
 	Video_call: 'Video call',
 	View_Original: 'View Original',
 	Voice_call: 'Voice call',
+	Websocket_disabled: 'Websocket is disabled for this server.\n{{contact}}',
 	Welcome: 'Welcome',
 	Welcome_to_RocketChat: 'Welcome to Rocket.Chat',
 	Whats_your_2fa: 'What\'s your 2FA code?',

app/i18n/locales/pt-BR.js

@@ -138,6 +138,7 @@ export default {
 	connecting_server: 'conectando no servidor',
 	Connecting: 'Conectando...',
 	Continue_with: 'Entrar com',
+	Contact_your_server_admin: 'Contate o administrador do servidor.',
 	Copied_to_clipboard: 'Copiado para a área de transferência!',
 	Copy: 'Copiar',
 	Permalink: 'Link-Permanente',
@@ -242,6 +243,7 @@ export default {
 	Nothing_to_save: 'Nada para salvar!',
 	Notify_active_in_this_room: 'Notificar usuários ativos nesta sala',
 	Notify_all_in_this_room: 'Notificar todos nesta sala',
+	Not_RC_Server: 'Este não é um servidor Rocket.Chat.\n{{contact}}',
 	Offline: 'Offline',
 	Oops: 'Ops!',
 	Online: 'Online',
@@ -334,7 +336,7 @@ export default {
 	Take_a_photo: 'Tirar uma foto',
 	Take_a_video: 'Gravar um vídeo',
 	Terms_of_Service: ' Termos de Serviço ',
-	The_URL_is_invalid: 'A URL fornecida é inválida ou não acessível. Por favor tente novamente, mas com uma url diferente.',
+	The_URL_is_invalid: 'A URL fornecida é inválida ou incapaz de estabelecer uma conexão segura.\n{{contact}}',
 	There_was_an_error_while_action: 'Aconteceu um erro {{action}}!',
 	This_room_is_blocked: 'Este quarto está bloqueado',
 	This_room_is_read_only: 'Este quarto é apenas de leitura',
@@ -375,6 +377,7 @@ export default {
 	Username_or_email: 'Usuário ou email',
 	Video_call: 'Chamada de vídeo',
 	Voice_call: 'Chamada de voz',
+	Websocket_disabled: 'Websocket está desativado para esse servidor.\n{{contact}}',
 	Welcome: 'Bem vindo',
 	Welcome_to_RocketChat: 'Bem vindo ao Rocket.Chat',
 	Whats_your_2fa: 'Qual seu código de autenticação?',

app/lib/rocketchat.js

@@ -48,6 +48,7 @@ import callJitsi from './methods/callJitsi';
 import { getDeviceToken } from '../notifications/push';
 import { SERVERS, SERVER_URL } from '../constants/userDefaults';
 import { setActiveUsers } from '../actions/activeUsers';
+import I18n from '../i18n';
 
 const TOKEN_KEY = 'reactnativemeteor_usertoken';
 const SORT_PREFS_KEY = 'RC_SORT_PREFS_KEY';
@@ -88,9 +89,53 @@ const RocketChat = {
 			console.warn(`RNUserDefaults error: ${ error.message }`);
 		}
 	},
+	async getWebsocketInfo({ server }) {
+		// Use useSsl: false only if server url starts with http://
+		const useSsl = !/http:\/\//.test(server);
+
+		const sdk = new RocketchatClient({ host: server, protocol: 'ddp', useSsl });
+
+		try {
+			await sdk.connect();
+		} catch (err) {
+			if (err.message && err.message.includes('400')) {
+				return {
+					success: false,
+					message: 'Websocket_disabled',
+					messageOptions: {
+						contact: I18n.t('Contact_your_server_admin')
+					}
+				};
+			}
+		}
+
+		sdk.disconnect();
+
+		return {
+			success: true
+		};
+	},
 	async getServerInfo(server) {
+		const notRCServer = {
+			success: false,
+			message: 'Not_RC_Server',
+			messageOptions: {
+				contact: I18n.t('Contact_your_server_admin')
+			}
+		};
 		try {
-			const result = await fetch(`${ server }/api/info`).then(response => response.json());
+			const result = await fetch(`${ server }/api/info`).then(async(response) => {
+				let res = notRCServer;
+				try {
+					res = await response.json();
+					if (!(res && res.success)) {
+						return notRCServer;
+					}
+				} catch (e) {
+					// do nothing
+				}
+				return res;
+			});
 			if (result.success) {
 				if (semver.lt(result.version, MIN_ROCKETCHAT_VERSION)) {
 					return {
@@ -102,14 +147,17 @@ const RocketChat = {
 						}
 					};
 				}
-				return result;
 			}
+			return result;
 		} catch (e) {
 			log(e);
 		}
 		return {
 			success: false,
-			message: 'The_URL_is_invalid'
+			message: 'The_URL_is_invalid',
+			messageOptions: {
+				contact: I18n.t('Contact_your_server_admin')
+			}
 		};
 	},
 	stopListener(listener) {

app/sagas/selectServer.js

@@ -22,9 +22,14 @@ import { SERVERS, TOKEN, SERVER_URL } from '../constants/userDefaults';
 const getServerInfo = function* getServerInfo({ server, raiseError = true }) {
 	try {
 		const serverInfo = yield RocketChat.getServerInfo(server);
-		if (!serverInfo.success) {
+		let websocketInfo = true;
+		if (raiseError) {
+			websocketInfo = yield RocketChat.getWebsocketInfo({ server });
+		}
+		if (!serverInfo.success || !websocketInfo.success) {
 			if (raiseError) {
-				Alert.alert(I18n.t('Oops'), I18n.t(serverInfo.message, serverInfo.messageOptions));
+				const info = serverInfo.success ? websocketInfo : serverInfo;
+				Alert.alert(I18n.t('Oops'), I18n.t(info.message, info.messageOptions));
 			}
 			yield put(serverFailure());
 			return;