chat.dart

@override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        color: CustomColors.ultraLightGray,
        child: Column(
          children: [
            AppBarFactory.appBarWithCustomBack(
              context,
              title: AppLocalizations
                  .of(context)
                  .chat,
              onTap: () => NavigationManager(null, context).back(),
            ),
            if (isLoading)
              Container(
                child: PlatformCircularProgressIndicator(
                  android: (c) => MaterialProgressIndicatorData(strokeWidth: 2),
                ),
                padding: EdgeInsets.all(8),
                width: 32,
                height: 32,
              ),
            Expanded(
              child: DashChat(
                onLoadEarlier: () {},
                scrollController: _scrollController,
                textInputAction: TextInputAction.newline,
                sendOnEnter: false,
                messageTimeBuilder: (url, [message]) => Offstage(),
                sendButtonBuilder:
                _isSendingMessage ? (context) => Text("Sending") : null,
                inputMaxLines: 5,
                showUserAvatar: true,
                scrollToBottom: false,
                timeFormat: DateFormat(StringUtils.displayTimeFormat),
                dateFormat: DateFormat(StringUtils.displayDateFormat),
                messages: _messages,
                user: presenter.user,
                leading: <Widget>[
                  Container(
                    child: Image.asset(
                      CustomIcons.paperclip,
                      scale: 3,
                    ),
                    width: 48,
                    height: 48,
                  )
                ],
                messageTextBuilder: (text, [message]) {
                  // TODO здесь можно обрабатывать сообщения с файлами
                  return Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: <Widget>[
                      Text(message.user.name,
                          style: TextStyle(color: CustomColors.lightGray)),
                      OffsetSpace.vertical(OffsetValue.small),
                      Text(text),
                    ],
                  );
                },
                onSend: (message) => presenter.onSendMessage(message),
              ),
            )
          ],
        ),
      ),
    );
  }