From 1eb9f71fdc325041ff18dda17d6d9a254e35879b Mon Sep 17 00:00:00 2001
From: slowbackspace <slowbackspace@gmail.com>
Date: Mon, 18 Feb 2019 12:49:27 +0100
Subject: [PATCH] auto detect browser locale if lang not stored in localstorage

---
 src/actions/LocalStorageActions.js |  5 ++++-
 src/utils/l10n.js                  | 11 +++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 src/utils/l10n.js

diff --git a/src/actions/LocalStorageActions.js b/src/actions/LocalStorageActions.js
index b73e3a63..c718d0dc 100644
--- a/src/actions/LocalStorageActions.js
+++ b/src/actions/LocalStorageActions.js
@@ -12,6 +12,7 @@ import { httpRequest } from 'utils/networkUtils';
 import * as buildUtils from 'utils/build';
 import * as storageUtils from 'utils/storage';
 import * as WalletActions from 'actions/WalletActions';
+import * as l10nUtils from 'utils/l10n';
 
 import { getAccountTokens } from 'reducers/utils';
 import type { Account } from 'reducers/AccountsReducer';
@@ -240,7 +241,9 @@ const loadStorageData = (): ThunkAction => (dispatch: Dispatch): void => {
 
     const language: ?string = storageUtils.get(TYPE, KEY_LANGUAGE);
     if (language) {
-        dispatch(WalletActions.fetchLocale(language));
+        dispatch(WalletActions.fetchLocale(JSON.parse(language)));
+    } else {
+        dispatch(WalletActions.fetchLocale(l10nUtils.getInitialLocale()));
     }
 };
 
diff --git a/src/utils/l10n.js b/src/utils/l10n.js
new file mode 100644
index 00000000..6e60550c
--- /dev/null
+++ b/src/utils/l10n.js
@@ -0,0 +1,11 @@
+import { LANGUAGE } from 'config/variables';
+
+export const getInitialLocale = (defaultLocale = 'en') => {
+    const browserLocale = navigator.language.split('-')[0];
+    if (LANGUAGE.some(e => e.code === browserLocale)) {
+        // Array of supported languages contains the locale we're looking for
+        return browserLocale;
+    }
+    // if browser lang is not supported return en as default locale
+    return defaultLocale;
+};
\ No newline at end of file