/// <summary>
/// Performs the work of a background task. The system calls this method when the associated background task has been triggered.
/// </summary>
/// <param name="taskInstance">An interface to an instance of the background task. The system creates this instance when the task has been triggered to run.</param>
public async void Run(IBackgroundTaskInstance taskInstance)
{
taskInstance.Canceled += taskInstance_Canceled;
BackgroundTaskDeferral deferral = null;
try
{
// Get the background task deferral
deferral = taskInstance.GetDeferral();
LogFile.Instance.LogInformation("", "", string.Format("Run: IsUISuspended - {0}, IsTaskRunning - {1}.", StorageSettings.IsUISuspended, StorageSettings.IsTaskRunning));
// If the ui is suspended
if (StorageSettings.IsUISuspended)
{
// Mark background task as completed
StorageSettings.IsTaskRunning = true;
LogFile.Instance.LogInformation(this.GetType().Name, "", "Background Task Started.");
// Create the cancellation token source
_cancellationTokenSource = new CancellationTokenSource();
// Create the mail clients list
_mailClients = new List <MailClient>();
// Loop through each setting
await StorageSettings.InitialiseAsync();
Parallel.ForEach(StorageSettings.AccountSettingsDataDictionary.Values, async(accountSettingsData) =>
{
// Create the mail client
MailClient mailClient = await MailClient.GetMailClient(accountSettingsData);
mailClient.UpdatedMessage += mailClient_UpdatedMessage;
mailClient.DeletedMessage += mailClient_DeletedMessage;
mailClient.DownloadedMessage += mailClient_DownloadedMessage;
// Login
if (mailClient.Login().IsSuccessfull)
{
LogFile.Instance.LogInformation(mailClient.AccountSettingsData.EmailAddress, this.GetType().Name, "Logged in.");
// Download unread messages
LogFile.Instance.LogInformation(mailClient.AccountSettingsData.EmailAddress, this.GetType().Name, "Download started...");
_mailClients.Add(mailClient);
await mailClient.DownloadUnreadMessagesTask(_cancellationTokenSource.Token);
LogFile.Instance.LogInformation(mailClient.AccountSettingsData.EmailAddress, this.GetType().Name, "Download completed.");
// Logout
await mailClient.Logout();
LogFile.Instance.LogInformation(mailClient.AccountSettingsData.EmailAddress, this.GetType().Name, "Logged out.");
// Unsubscribe from events
mailClient.DownloadedMessage -= mailClient_DownloadedMessage;
mailClient.UpdatedMessage -= mailClient_UpdatedMessage;
mailClient.DeletedMessage -= mailClient_DeletedMessage;
// Remove mail client
_mailClients.Remove(mailClient);
// Save
await StorageSettings.SaveMailHeaderDictionary();
}
});
}
}
catch (Exception ex)
{
LogFile.Instance.LogError(this.GetType().Name, "", ex.ToString());
}
finally
{
// Remove the cancellation token
_cancellationTokenSource = null;
// Mark background task as completed
StorageSettings.IsTaskRunning = false;
LogFile.Instance.LogInformation(this.GetType().Name, "", "Background Task Completed.");
deferral.Complete();
}
}