refactor appContainer.me

src/client/js/components/BookmarkButton.jsx

@@ -56,7 +56,7 @@ export default class BookmarkButton extends React.Component {
   }
 
   isUserLoggedIn() {
-    return this.props.crowi.me !== '';
+    return this.props.crowi.me != null;
   }
 
   render() {

src/client/js/components/LikeButton.jsx

@@ -37,7 +37,7 @@ class LikeButton extends React.Component {
   }
 
   isUserLoggedIn() {
-    return this.props.appContainer.me !== '';
+    return this.props.appContainer.me != null;
   }
 
   render() {

src/client/js/components/PageAttachment.jsx

@@ -89,7 +89,7 @@ class PageAttachment extends React.Component {
   }
 
   isUserLoggedIn() {
-    return this.props.appContainer.me !== '';
+    return this.props.appContainer.me != null;
   }
 
   render() {

src/client/js/services/AppContainer.js

@@ -29,7 +29,7 @@ export default class AppContainer extends Container {
 
     const body = document.querySelector('body');
 
-    this.me = body.dataset.currentUsername;
+    this.me = body.dataset.currentUsername || null; // will be initialized with null when data is empty string
     this.isAdmin = body.dataset.isAdmin === 'true';
     this.csrfToken = body.dataset.csrftoken;
     this.isPluginEnabled = body.dataset.pluginEnabled === 'true';