status-desktop/ui/app/AppLayouts/Chat/ContactsColumn/ChannelList.qml

import QtQuick 2.12
import QtQuick.Controls 2.3
import QtQuick.Layouts 1.3
import "../../../../shared"
import "../../../../imports"
import "../components"

Item {
    property alias channelListCount: chatGroupsListView.count
    id: chatGroupsContainer
    Layout.fillHeight: true
    Layout.fillWidth: true

    ListView {
        id: chatGroupsListView
        anchors.fill: parent
        model: chatsModel.chats
        delegate: Channel {}
        onCountChanged: {
            if (count > 0 && chatsModel.activeChannelIndex > -1) {
                // If a chat is added or removed, we set the current index to the first value
                chatsModel.activeChannelIndex = 0;
                currentIndex = 0;
            } else {
                if(chatsModel.activeChannelIndex > -1){
                    chatGroupsListView.currentIndex = 0;
                } else {
                    // Initial state. No chat has been selected yet
                    chatGroupsListView.currentIndex = -1;
                }
            }
        }
    }

    Connections {
        target: chatsModel.chats
        onDataChanged: {
            // If the current active channel receives messages and changes its position,
            // refresh the currentIndex accordingly
            if(chatsModel.activeChannelIndex !== chatGroupsListView.currentIndex){
                chatGroupsListView.currentIndex = chatsModel.activeChannelIndex
            }
        }
    }
}