Display icons for all conversations

lib/models/conversation.dart

@@ -56,6 +56,9 @@ class Conversation extends SerializableElement<Conversation> {
   /// Get the list of members in the conversation
   Set<int> get membersID => members.map((e) => e.userID).toSet();
 
+  /// Get the list of the OTHER members of the conversation (all except current user)
+  Set<int> get otherMembersID => membersID..remove(userID());
+
   /// Check if the last message has been seen or not
   bool get sawLastMessage => lastActivity <= membership.lastAccessTime;
 

lib/ui/tiles/conversation_tile.dart

@@ -1,11 +1,10 @@
-import 'package:cached_network_image/cached_network_image.dart';
 import 'package:comunic/helpers/conversations_helper.dart';
 import 'package:comunic/lists/users_list.dart';
 import 'package:comunic/models/conversation.dart';
+import 'package:comunic/ui/widgets/conversation_image_widget.dart';
 import 'package:comunic/ui/widgets/custom_list_tile.dart';
 import 'package:comunic/utils/date_utils.dart';
 import 'package:comunic/utils/intl_utils.dart';
-import 'package:comunic/utils/ui_utils.dart';
 import 'package:flutter/material.dart';
 
 /// Single conversation tile
@@ -73,15 +72,8 @@ class ConversationTile extends StatelessWidget {
           : (conversation.color ?? Colors.blue).withOpacity(0.2),
 
       // Leading icon
-      leading: conversation.logoURL == null
-          ? Icon(
-              conversation.sawLastMessage ? Icons.check_circle : Icons.lens,
-              color: (darkTheme() ? darkAccentColor : null),
-            )
-          : CachedNetworkImage(
-              imageUrl: conversation.logoURL,
-              width: 30,
-            ),
+      leading:
+          ConversationImageWidget(conversation: conversation, users: usersList),
 
       // Conversation information
       isThreeLine: true,

lib/ui/widgets/conversation_image_widget.dart

@@ -0,0 +1,118 @@
+import 'package:cached_network_image/cached_network_image.dart';
+import 'package:comunic/lists/users_list.dart';
+import 'package:comunic/models/conversation.dart';
+import 'package:comunic/models/user.dart';
+import 'package:comunic/ui/widgets/account_image_widget.dart';
+import 'package:flutter/material.dart';
+
+/// Conversation image widget
+///
+/// @author Pierre Hubert
+
+class ConversationImageWidget extends StatelessWidget {
+  final Conversation conversation;
+  final UsersList users;
+  final double size;
+
+  const ConversationImageWidget(
+      {Key key,
+      @required this.conversation,
+      @required this.users,
+      this.size = 30})
+      : assert(conversation != null),
+        assert(users != null),
+        assert(size > 0),
+        super(key: key);
+
+  @override
+  Widget build(BuildContext context) => Material(
+        child: _buildIcon(),
+        borderRadius: BorderRadius.all(
+          Radius.circular(18.0),
+        ),
+        clipBehavior: Clip.hardEdge,
+      );
+
+  Widget _buildIcon() {
+    if (conversation.logoURL != null)
+      return CachedNetworkImage(
+        imageUrl: conversation.logoURL,
+        width: size,
+      );
+
+    if (conversation.members.length < 2)
+      return Icon(
+        Icons.lock,
+        size: size,
+      );
+
+    if (conversation.members.length == 2)
+      return AccountImageWidget(
+        width: size,
+        user: users.getUser(conversation.otherMembersID.first),
+      );
+
+    return MultipleAccountImagesWidget(
+      users:
+          conversation.otherMembersID.map((id) => users.getUser(id)).toList(),
+      size: size,
+    );
+  }
+}
+
+class MultipleAccountImagesWidget extends StatelessWidget {
+  final List<User> users;
+  final double size;
+
+  const MultipleAccountImagesWidget({
+    Key key,
+    @required this.users,
+    @required this.size,
+  })  : assert(users != null),
+        assert(size != null),
+        assert(size > 0),
+        super(key: key);
+
+  @override
+  Widget build(BuildContext context) => Container(
+        width: size,
+        height: size,
+        child: _buildContent(),
+      );
+
+  Widget _buildContent() {
+    if (users.length == 2) return _buildFirstRow();
+
+    return Column(
+      children: [_buildFirstRow(), _buildSecondRow()],
+    );
+  }
+
+  Widget _buildFirstRow() => Row(
+        children: [
+          AccountImageWidget(
+            user: users[0],
+            width: size / 2,
+          ),
+          AccountImageWidget(
+            user: users[1],
+            width: size / 2,
+          )
+        ],
+      );
+
+  Widget _buildSecondRow() => Row(
+        children: [
+          AccountImageWidget(
+            user: users[2],
+            width: size / 2,
+          ),
+          users.length > 3
+              ? AccountImageWidget(
+                  user: users[3],
+                  width: size / 2,
+                )
+              : Container()
+        ],
+      );
+}

pubspec.lock

@@ -276,7 +276,7 @@ packages:
     source: hosted
     version: "0.1.1"
   image:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: image
       url: "https://pub.dartlang.org"

pubspec.yaml

@@ -100,6 +100,9 @@ dependencies:
   # Copy content to clipboard
   clipboard: ^0.1.2+8
 
+  # Image manager
+  image: ^2.1.19
+
 dev_dependencies:
   flutter_test:
     sdk: flutter