/// <summary>
/// Handles the <see cref="BlogPostBeforeUpdate"/> event by creating any new tags.
/// </summary>
/// <param name="notification"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public async Task Handle(BlogPostBeforeUpdate notification, CancellationToken cancellationToken)
{
if (notification.TagTitles == null || notification.TagTitles.Count <= 0 || notification.PostTags == null)
{
return;
}
// get tags that are not among current tags
var currentTitles = notification.PostTags.Select(pt => pt.Tag.Title);
var distinctTitles = notification.TagTitles.Except(currentTitles);
var allTags = await GetAllAsync();
// create any new tags
foreach (var title in distinctTitles)
{
// make sure the incoming title does not already exist
var tag = allTags.FirstOrDefault(t => t.Title.Equals(title, StringComparison.CurrentCultureIgnoreCase));
if (tag == null)
{
tag = await CreateAsync(new Tag { Title = title });
}
}
}
/// <summary>
/// Handles the <see cref="BlogPostBeforeUpdate"/> event by creating a new category
/// if not already exisits.
/// </summary>
/// <param name="notification"></param>
/// <param name="cancellationToken"></param>
/// <remarks>
/// This only happens when calling from metaweblog with creating a new category.
/// </remarks>
public async Task Handle(BlogPostBeforeUpdate notification, CancellationToken cancellationToken)
{
await HandleNewCatAsync(notification.CategoryTitle);
}