private async Task UpdateMessagesCollectionAsync()
{
if (!MainActivity.CheckInternetConnection())
{
var connectivityErrorPopup = this.GetControl <Grid>(ControlNames.ConnectivityErrorPopup);
if (!connectivityErrorPopup.IsVisible)
{
connectivityErrorPopup.IsVisible = true;
await connectivityErrorPopup.FadeTo(1, 100);
}
}
var allMessages = this.ServiceProvider.MessagesApiProvider.RetreiveSpecificMessages().ToList();
allMessages.Distinct()
.ToList()
.ForEach(_ => this.Messages.Add(new ObservableMessage(_)));
await Task.CompletedTask;
}
private IEnumerable <Message> PollServerByMode(PollServerMode mode)
{
if (this.ServiceProvider.AuthenticationService.IsAuthenticated)
{
if (MainActivity.CheckInternetConnection())
{
var pollingUrl = (mode == PollServerMode.Specific) ? FirebaseConstants.PollingSpecificUrl
: FirebaseConstants.PollingAllUrl;
using (var webClient = new WebClient())
{
webClient.Headers.Add("AuthToken", this.ServiceProvider.AuthenticationService.CurrentAuthToken);
var responseContent = webClient.DownloadString(pollingUrl);
if (!string.IsNullOrEmpty(responseContent))
{
var filteredMessages = JsonConvert.DeserializeObject <IEnumerable <MonitorApiMessageWrapper> >(responseContent)
.Select(_ => _.MapToDomainMessage())
.OrderByDescending(_ => _.CreatedOn)
.ToList();
if (mode == PollServerMode.Specific)
{
Task.Run(() => this.ServiceProvider.PermanentCacheService.Set(MessagesCacheKey, filteredMessages));
}
return(filteredMessages);
}
}
}
else if (mode == PollServerMode.Specific)
{
if (this.ServiceProvider.PermanentCacheService.IsSet(MessagesCacheKey))
{
return(this.ServiceProvider.PermanentCacheService.Get <List <Message> >(MessagesCacheKey));
}
}
}
return(new List <Message>());
}
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) => value != null && MainActivity.CheckInternetConnection();