public async Task <SyncResult> SyncCategories()
{
// Current set of categories in the database so we can check if any have been removed.
List <String> currentList = (await DataAccessLayer.Current.GetCategoryNamesAsync()).ToList();
SyncResult result = SyncResult.Failed;
HttpResponseMessage response;
try
{
response = await WebAPI.GetCategories();
if (response.IsSuccessStatusCode)
{
String[] Categories = await response.Content.ReadAsAsync <String[]>();
foreach (String s in Categories)
{
// Add the category to the database
await DataAccessLayer.Current.UpdateOrAddCategoryAsync(new Category()
{
Name = s, IsActive = true
}, CategoryKeepActive.Keep);
//Remove from the current list.
currentList.Remove(s);
}
// If there are any categories remaining in currentList, then they've been removed
// from the backend and we need to delete those records from our database.
foreach (String s in currentList)
{
await DataAccessLayer.Current.DeleteCategoryAsync(s);
}
// Refresh the Configuration object
await Configuration.PopulateCategoriesFromDB();
result = SyncResult.Success;
}
}
catch (Exception ex)
{
Debug.WriteLine("SyncCategories failed: " + ex.Message);
}
return(result);
}