feat: user list

lib/src/user_item.dart

@@ -0,0 +1,69 @@
+import 'package:flutter/material.dart';
+import 'package:jiffy/jiffy.dart';
+import 'package:stream_chat/stream_chat.dart';
+import 'package:stream_chat_flutter/src/user_list_view.dart';
+import 'package:stream_chat_flutter/stream_chat_flutter.dart';
+
+import 'stream_chat_theme.dart';
+
+///
+/// It shows the current [User] preview.
+///
+/// The widget uses a [StreamBuilder] to render the user information image as soon as it updates.
+///
+/// Usually you don't use this widget as it's the default user preview used by [UserListView].
+///
+/// The widget renders the ui based on the first ancestor of type [StreamChatTheme].
+/// Modify it to change the widget appearance.
+class UserItem extends StatelessWidget {
+  /// Instantiate a new UserItem
+  const UserItem(
+      {Key key,
+      @required this.user,
+      this.onTap,
+      this.onLongPress,
+      this.onImageTap})
+      : super(key: key);
+
+  /// Function called when tapping this widget
+  final void Function(User) onTap;
+
+  /// Function called when long pressing this widget
+  final void Function(User) onLongPress;
+
+  /// User displayed
+  final User user;
+
+  /// The function called when the image is tapped
+  final void Function(User) onImageTap;
+
+  @override
+  Widget build(BuildContext context) {
+    return ListTile(
+      onTap: () {
+        if (onTap != null) {
+          onTap(user);
+        }
+      },
+      onLongPress: () {
+        if (onLongPress != null) {
+          onLongPress(user);
+        }
+      },
+      leading: UserAvatar(
+          user: user,
+          showOnlineStatus: true,
+          onTap: (user) {
+            if (onImageTap != null) {
+              onImageTap(user);
+            }
+          }),
+      title: Text(user.name),
+      subtitle: _buildLastActive(context),
+    );
+  }
+
+  Widget _buildLastActive(context) {
+    return Text('Last seen ${Jiffy(user.lastActive).fromNow()}');
+  }
+}