//main screen-returns the selected post in the selected category with entries to the index page, and also get data to viewbags to pass layout
public IActionResult Index(int postCategoryId = 1, int postId = 1, int selectPageNumber = 1)
{
ViewBag.UserInfo = _accountService.GetUserInfos();
ViewBag.SelectedCategory = _postCategoryService.GetSelectedCategory(x => x.Id == postCategoryId);
ViewBag.CategoryList = _postCategoryService.GetAllCategories();
ViewBag.PostList = _postService.GetPostListByCategoryWithEntries(postCategoryId);
ViewBag.postCategoryId = postCategoryId;
var postWithEntriesViewModel = new PostWithEntriesWithPaginationViewModel();
postWithEntriesViewModel = _postService.GetSelectedPostWithEntries(postId, selectPageNumber);
return(View(postWithEntriesViewModel));
}