Add user panel

lib/ui/widgets/safe_state.dart

@@ -42,4 +42,14 @@ abstract class SafeState<T extends StatefulWidget> extends State<T> {
       setState(() => onEvent(d));
     }));
   }
+
+  /// Safely mimic the setTimeout javascript function
+  ///
+  /// If the widget is unmounted before the end of the timeout,
+  /// the callback function is not called
+  void setTimeout(int secs, void Function() cb) {
+    Timer(Duration(seconds: secs), () {
+      if (!_unmounted) cb();
+    });
+  }
 }

lib/ui/widgets/tablet_mode/current_user_panel.dart

@@ -0,0 +1,58 @@
+import 'package:comunic/helpers/users_helper.dart';
+import 'package:comunic/models/user.dart';
+import 'package:comunic/ui/widgets/account_image_widget.dart';
+import 'package:comunic/ui/widgets/safe_state.dart';
+import 'package:comunic/utils/account_utils.dart';
+import 'package:comunic/utils/ui_utils.dart';
+import 'package:flutter/material.dart';
+
+/// Current user panel
+///
+/// @author Pierre HUBERT
+
+class CurrentUserPanel extends StatefulWidget {
+  @override
+  _CurrentUserPanelState createState() => _CurrentUserPanelState();
+}
+
+class _CurrentUserPanelState extends SafeState<CurrentUserPanel> {
+  User _user;
+
+  Future<void> _refresh() async {
+    try {
+      final user = await UsersHelper().getSingleWithThrow(userID());
+
+      setState(() => _user = user);
+    } catch (e, s) {
+      print("Could not load user panel! $e\n$s");
+
+      setTimeout(5, _refresh);
+    }
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    _refresh();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      height: 80,
+      child: Center(child: _buildContent()),
+    );
+  }
+
+  Widget _buildContent() {
+    if (_user == null) return buildCenteredProgressBar();
+
+    return ListTile(
+      leading: AccountImageWidget(
+        user: _user,
+        width: 50,
+      ),
+      title: Text(_user.displayName),
+    );
+  }
+}