void UpdatePosts(PullToRefreshViewModel refreshModel, StackLayout PostsContainer, PostItem message, string groupid)
{
if (string.Equals(message.GroupID, groupid))
{
Debug.WriteLine("signalr message and current group match!");
//PostItem postwID = await App.DataDB.GetSinglePostByPostTextTitleUserIDGroupID(message.Body, message.Title, message.UserId, message.GroupID);//dont delete, sometimes azure gets delayed so calling it here gives it time
if (message != null)
{
Debug.WriteLine("Recieved PostItem, generated ID is: {0}", message.ID);
//add to top stack
Device.BeginInvokeOnMainThread(() => {
if (PostsContainer == null)
{
Debug.WriteLine("no posts in feed yet");
refreshModel.ExecuteRefreshCommand();
}
else
{
Debug.WriteLine("{0}, posts in feed", PostsContainer.Children.Count);
PostsContainer.Children.Insert(1, new PostItemStackLayout(message));
}
});
}
else
{
Debug.WriteLine("Couldn't fetch PostItem from db");
}
}
else
{
Debug.WriteLine("PostItem {0} received, does not match group id {1}", message.ID, message.GroupID);
}
}
public CreatePostPage(PullToRefreshViewModel refresher, string title, string groupname, string groupid = null)
{
this.refresher = refresher;
this.GroupName = groupname;
this.groupid = groupid;
this.Title = title;
this.BackgroundColor = Color.White;
Content = CreatePostLayout();
}
public async Task ListenForNewPosts(PullToRefreshViewModel refreshModel, StackLayout PostsContainer, string groupid)
{
App.ChatClient.OnMessageReceived += (sender, message) => {
Debug.WriteLine("Post data received, processing");
//add data to new postitemstacklayout, add to top of scrollfeed.content
if (message is PostItem)
{
Debug.WriteLine("Recieved from SignalR: post by {0}, post body: {1}, in group {2}", message.Title, message.Body, message.GroupID);
UpdatePosts(refreshModel, PostsContainer, message, groupid);
}
};
}
public GroupFeed(string groupname, string groupid = null)
{
MessagingCenter.Subscribe <PostItemStackLayout> (this, Values.NotBusy, (args) => {
Debug.WriteLine("setting isbusy false");
IsBusy = false;
});
MessagingCenter.Subscribe <PostItemStackLayout> (this, Values.Busy, (args) => {
Debug.WriteLine("setting isbusy true");
IsBusy = true;
});
ListenForRefresh();
refreshHandler = new PullToRefreshViewModel(this);
BindingContext = refreshHandler;
this.groupid = groupid;
this.groupname = groupname;
this.BackgroundColor = Color.FromHex(Values.BACKGROUNDLIGHTSILVER);
this.Title = groupname;
PopulateContent();
}