LandingPage: Conditionally show "Back to {site_title}" instead of login form, fixes #135

app/soapbox/features/public_layout/components/header.js

@@ -1,12 +1,28 @@
 import React from 'react';
+import { connect } from 'react-redux';
+import ImmutablePropTypes from 'react-immutable-proptypes';
 import ImmutablePureComponent from 'react-immutable-pure-component';
 import { Link } from 'react-router-dom';
 import LoginForm from 'soapbox/features/auth_login/components/login_form';
 import SiteLogo from './site_logo';
+import SoapboxPropTypes from 'soapbox/utils/soapbox_prop_types';
 
-export default class Header extends ImmutablePureComponent {
+const mapStateToProps = state => ({
+  me: state.get('me'),
+  instance: state.get('instance'),
+});
+
+export default @connect(mapStateToProps)
+class Header extends ImmutablePureComponent {
+
+  static propTypes = {
+    me: SoapboxPropTypes.me,
+    instance: ImmutablePropTypes.map,
+  }
 
   render() {
+    const { me, instance } = this.props;
+
     return (
       <nav className='header'>
         <div className='header-container'>
@@ -20,10 +36,13 @@ export default class Header extends ImmutablePureComponent {
           <div className='nav-center' />
           <div className='nav-right'>
             <div className='hidden-sm'>
-              <LoginForm />
+              {me
+                ? <Link className='nav-link nav-button webapp-btn' to='/'>Back to {instance.get('title')}</Link>
+                : <LoginForm />
+              }
             </div>
             <div className='visible-sm'>
-              <Link className='webapp-btn nav-link nav-button' to='/auth/sign_in'>Log in</Link>
+              <Link className='nav-link nav-button webapp-btn' to='/auth/sign_in'>Log in</Link>
             </div>
           </div>
         </div>