public ActionResult TagManager(int id, AddTagPostViewModel vm)
{
try
{
List <Tag> previouslySelectedTags = _tagRepo.GetPostTags(id);
List <int> previouslySelectedTagIds = new List <int>();
foreach (Tag tag in previouslySelectedTags)
{
previouslySelectedTagIds.Add(tag.Id);
}
if (vm.SelectedTagIds != null)
{
foreach (int tagId in vm.SelectedTagIds)
{
if (!previouslySelectedTagIds.Contains(tagId))
{
_tagRepo.AddTagToPost(tagId, id);
}
}
foreach (int tagId in previouslySelectedTagIds)
{
if (!vm.SelectedTagIds.Contains(tagId))
{
_tagRepo.RemoveTagFromPost(tagId, id);
}
}
}
else
{
foreach (int tagId in previouslySelectedTagIds)
{
_tagRepo.RemoveTagFromPost(tagId, id);
}
}
return(RedirectToAction("Details", "Post", new { id = id }));
}
catch (Exception)
{
return(RedirectToAction("Details", "Post", new { id = id }));
}
}
//GET: TagController
public ActionResult TagManager(int Id)
{
//all tags
List <Tag> tags = _tagRepo.GetAllTags();
//current tags that apply to post
List <Tag> currentTags = _tagRepo.GetPostTags(Id);
AddTagPostViewModel vm = new AddTagPostViewModel
{
Post = _postRepo.GetPostById(Id),
Tags = _tagRepo.GetAllTags(),
CurrentTagIds = new List <int>()
};
foreach (Tag tag in currentTags)
{
vm.CurrentTagIds.Add(tag.Id);
}
return(View(vm));
}