add RootDialog and Network contexts, update app bootstrapping

src/RootProvider.jsx

@@ -0,0 +1,44 @@
+import React, { Component } from 'react';
+import {
+  I18nProvider,
+} from '@lingui/react';
+
+import { NetworkProvider } from './contexts/Network';
+import { RootDialogProvider } from './contexts/RootDialog';
+import { ConfigProvider } from './contexts/Config';
+
+import ja from '../build/locales/ja/messages';
+import en from '../build/locales/en/messages';
+
+export function getLanguage (nav) {
+  const language = (nav.languages && nav.languages[0]) || nav.language || nav.userLanguage;
+  const languageWithoutRegionCode = language.toLowerCase().split(/[_-]+/)[0];
+
+  return languageWithoutRegionCode;
+}
+
+class RootProvider extends Component {
+  render () {
+    const { children } = this.props;
+
+    const catalogs = { en, ja };
+    const language = getLanguage(navigator);
+
+    return (
+      <I18nProvider
+        language={language}
+        catalogs={catalogs}
+      >
+        <RootDialogProvider>
+          <NetworkProvider>
+            <ConfigProvider>
+              {children}
+            </ConfigProvider>
+          </NetworkProvider>
+        </RootDialogProvider>
+      </I18nProvider>
+    );
+  }
+}
+
+export default RootProvider;