/// <summary>
/// Awaitable function that shows all controls to create a new <see cref="Article"/>.\n
/// Generates a new <see cref="ArticleEditViewModel"/>, tries to get the next <see cref="ArticleID"/> and calls <see cref="AddTabContentViewModel"/> to add the viewmodel to the window.\n
/// Calls <see cref="Interface.IEditObserver.ReceiveArticleEditViewModel"/> for each registered <see cref="IEditObserver"/> in this instance.
/// </summary>
/// <param name="sender"></param>
/// <returns></returns>
public async Task ReceiveNewArticleCommand(object sender)
{
var tempid = await ParentViewModel.Database.GetNextArticleID();
var articleEditViewModel = new ArticleView.Contextual.ArticleEditViewModel(this, tempid);
ParentViewModel.AddTabContentViewModel(articleEditViewModel);
articleEditViewModel.RibbonTabItem.IsSelected = true;
foreach (var observer in registeredObservers)
observer.ReceiveArticleEditViewModel(articleEditViewModel);
}
/// <summary>
/// Awaitable function that either shows all controls to modify an existing <see cref="Article"/> or loads the selected <see cref="Article"/> and uses <see cref="ReceiveData"/> of the viewmodel referenced <see cref="ReceiveRequestArticleCommand"/>.\n
/// Calls <see cref="Interface.IEditObserver.ReceiveArticleEditViewModel"/> for each registered <see cref="IEditObserver"/> in this instance when <see cref="ViewModelRequestingArticle"/> is null.
/// </summary>
/// <param name="sender"></param>
/// <returns></returns>
public async Task ReceiveEditArticleCommand(object sender)
{
if (SelectedArticle != null)
{
if (ViewModelRequestingArticle == null)
{
var temp = await ParentViewModel.Database.GetArticle(SelectedArticle.ArticleID);
var articleEditViewModel = new ArticleView.Contextual.ArticleEditViewModel(this, temp);
ParentViewModel.AddTabContentViewModel(articleEditViewModel);
articleEditViewModel.RibbonTabItem.IsSelected = true;
foreach (var observer in registeredObservers)
observer.ReceiveArticleEditViewModel(articleEditViewModel);
}
else
{
var temp = await ParentViewModel.Database.GetArticle(SelectedArticle.ArticleID);
ViewModelRequestingArticle.ReceiveData(temp);
ParentViewModel.SelectedContent = ViewModelRequestingArticle.TabContent;
ViewModelRequestingArticle = null;
}
}
}
