public async Task <FeedsPage> GetFeed(int pageNumber = 0, int pageSize = 10)
{
Page <FeedsEntity> page = await DbContext.FeedsRepo.PageAsync(pageNumber *pageSize, pageSize).ConfigureAwait(false);
var authorsIds = page.Items.Select(i => i.AuthorId).Distinct();
var authors = await DbContext.UsersRepo.GetByKeysAsync(authorsIds);
var authorIdToNameMapping = authors.ToDictionary(u => u.Id, u => string.Format("{0} {1}", u.FirstName, u.LastName));
var result = new FeedsPage
{
CurrentPage = page.CurrentPage,
Items = page.Items.Select(i => new Feed
{
AuthorId = i.AuthorId,
Id = i.Id,
Text = i.Text,
AurhorName = authorIdToNameMapping[i.AuthorId]
}).ToList(),
ItemsPerPage = page.ItemsPerPage,
TotalItems = page.TotalItems,
TotalPages = page.TotalPages
};
return(result);
}
/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached. The Parameter
/// property is typically used to configure the page.</param>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
SetRandomImageName();
viewModel = (ViewModel)e.Parameter;
feedsViewModel = new FeedsViewModel();
Task.Run(new Func <Task>(InitFeedsViewModel));
this.DataContext = feedsViewModel;
FeedsPage.Navigate(typeof(Feeds), e.Parameter);
}
