lint

packages/stream_chat_flutter/lib/src/url_attachment.dart

@@ -3,23 +3,30 @@ import 'package:flutter/material.dart';
 import 'package:stream_chat_flutter/src/utils.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 
+/// Widget to display URL attachment
 class UrlAttachment extends StatelessWidget {
-  final Attachment urlAttachment;
+  /// Constructor for creating a [UrlAttachment]
-  final String hostDisplayName;
-  final EdgeInsets textPadding;
-
   const UrlAttachment({
+    Key? key,
     required this.urlAttachment,
     required this.hostDisplayName,
     this.textPadding = const EdgeInsets.symmetric(
       horizontal: 16,
       vertical: 8,
     ),
-  });
+  }) : super(key: key);
+
+  /// Attachment to be displayed
+  final Attachment urlAttachment;
+
+  /// Host name
+  final String hostDisplayName;
+
+  /// Padding for text
+  final EdgeInsets textPadding;
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context) => GestureDetector(
-    return GestureDetector(
         onTap: () {
           launchURL(
             context,
@@ -32,7 +39,7 @@ class UrlAttachment extends StatelessWidget {
             if (urlAttachment.imageUrl != null)
               Container(
                 clipBehavior: Clip.antiAliasWithSaveLayer,
-              margin: EdgeInsets.symmetric(horizontal: 8),
+                margin: const EdgeInsets.symmetric(horizontal: 8),
                 decoration: BoxDecoration(
                   borderRadius: BorderRadius.circular(8),
                 ),
@@ -48,10 +55,11 @@ class UrlAttachment extends StatelessWidget {
                       bottom: -1,
                       child: Container(
                         decoration: BoxDecoration(
-                        borderRadius: BorderRadius.only(
+                          borderRadius: const BorderRadius.only(
                             topRight: Radius.circular(16),
                           ),
-                        color: StreamChatTheme.of(context).colorTheme.blueAlice,
+                          color:
+                              StreamChatTheme.of(context).colorTheme.blueAlice,
                         ),
                         child: Padding(
                           padding: const EdgeInsets.only(
@@ -105,5 +113,4 @@ class UrlAttachment extends StatelessWidget {
           ],
         ),
       );
-  }
 }

packages/stream_chat_flutter/lib/src/user_avatar.dart

@@ -1,10 +1,11 @@
 import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
 import 'package:stream_chat_flutter_core/stream_chat_flutter_core.dart';
+import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 
-import '../stream_chat_flutter.dart';
+/// Widget that displays a user avatar
-
 class UserAvatar extends StatelessWidget {
+  /// Constructor to create a [UserAvatar]
   const UserAvatar({
     Key? key,
     required this.user,
@@ -20,16 +21,37 @@ class UserAvatar extends StatelessWidget {
     this.selectionThickness = 4,
   }) : super(key: key);
 
+  /// User whose avatar is to displayed
   final User user;
+
+  /// Alignment of the online indicator
   final Alignment onlineIndicatorAlignment;
+
+  /// Size of the avatar
   final BoxConstraints? constraints;
+
+  /// [BorderRadius] of the image
   final BorderRadius? borderRadius;
+
+  /// Size of the online indicator
   final BoxConstraints? onlineIndicatorConstraints;
+
+  /// Callback when avatar is tapped
   final void Function(User)? onTap;
+
+  /// Callback when avatar is long pressed
   final void Function(User)? onLongPress;
+
+  /// Flag for showing online status
   final bool showOnlineStatus;
+
+  /// Flag for if avatar is selected
   final bool selected;
+
+  /// Color of selection
   final Color? selectionColor;
+
+  /// Selection thickness around the avatar
   final double selectionThickness;
 
   @override
@@ -53,10 +75,10 @@ class UserAvatar extends StatelessWidget {
           child: hasImage
               ? CachedNetworkImage(
                   filterQuality: FilterQuality.high,
+                  // ignore: cast_nullable_to_non_nullable
                   imageUrl: user.extraData['image'] as String,
-                  errorWidget: (_, __, ___) {
+                  errorWidget: (_, __, ___) =>
-                    return streamChatTheme.defaultUserImage(context, user);
+                      streamChatTheme.defaultUserImage(context, user),
-                  },
                   fit: BoxFit.cover,
                 )
               : streamChatTheme.defaultUserImage(context, user),
@@ -98,12 +120,12 @@ class UserAvatar extends StatelessWidget {
                   child: Container(
                     margin: const EdgeInsets.all(2),
                     constraints: onlineIndicatorConstraints ??
-                        BoxConstraints.tightFor(
+                        const BoxConstraints.tightFor(
                           width: 8,
                           height: 8,
                         ),
                     child: Material(
-                      shape: CircleBorder(),
+                      shape: const CircleBorder(),
                       color: streamChatTheme.colorTheme.accentGreen,
                     ),
                   ),

packages/stream_chat_flutter/lib/src/user_item.dart

@@ -5,16 +5,17 @@ import 'package:stream_chat_flutter/src/user_list_view.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 import 'package:stream_chat_flutter_core/stream_chat_flutter_core.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.
+/// 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].
+/// 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].
+/// 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
@@ -47,8 +48,7 @@ class UserItem extends StatelessWidget {
   final bool showLastOnline;
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context) => ListTile(
-    return ListTile(
         onTap: () {
           if (onTap != null) {
             onTap!(user);
@@ -66,7 +66,7 @@ class UserItem extends StatelessWidget {
               onImageTap!(user);
             }
           },
-        constraints: BoxConstraints.tightFor(
+          constraints: const BoxConstraints.tightFor(
             height: 40,
             width: 40,
           ),
@@ -82,15 +82,13 @@ class UserItem extends StatelessWidget {
         ),
         subtitle: showLastOnline ? _buildLastActive(context) : null,
       );
-  }
 
-  Widget _buildLastActive(context) {
+  Widget _buildLastActive(context) => Text(
-    return Text(
         user.online == true
             ? 'Online'
             : 'Last online ${Jiffy(user.lastActive).fromNow()}',
         style: StreamChatTheme.of(context).textTheme.footnote.copyWith(
-          color: StreamChatTheme.of(context).colorTheme.black.withOpacity(.5)),
+            color:
+                StreamChatTheme.of(context).colorTheme.black.withOpacity(.5)),
       );
-  }
 }