How to get a media item when in a publishing event handler
I have a custom publishing component that I use for some custom validation.
In this handler I'm applying some validation to some simple fields such as checked publishing dates and keywords.
Here's a snippet of the code:
private void ContentService_Publishing(IContentService sender, ContentPublishingEventArgs e)
{
// Handle any blog articles being published
var blogArticleEntitiesBeingPublished = e.PublishedEntities.Where(x => x.ContentType.Alias.Equals("blogArticle")).ToList();
foreach (var blogArticleEntity in blogArticleEntitiesBeingPublished)
{
// Check keywords (must have a minimum of 3)
var keywords = blogArticleEntity.GetValue<string>("keywords");
var keywordsList = JsonConvert.DeserializeObject<List<string>>(keywords);
if (keywordsList != null && keywordsList.Count() < 3)
{
e.CancelOperation(new EventMessage("Keywords", "The article needs at least 3 keywords", messageType: EventMessageType.Error));
break;
}
// Force articles with a future publish date to use the scheduled publish feature
var publishDate = blogArticleEntity.GetValue<DateTime>("publishDate");
if (publishDate != null && publishDate > DateTime.Now)
{
e.CancelOperation(new EventMessage("Publish Date", "The article has a publish date in the future, please use the Schedule feature to publish the article on the publish date", messageType: EventMessageType.Error));
break;
}
// Make sure there is alt text on the main image
var mainImage = blogArticleEntity.GetValue("newMainImage");
if (mainImage != null)
{
// Hmmm?
}
}
}
The keywords and publish date validation is working fine, but I can't work out for the life of me how to get the newMainImage media item.
As you can see I can get something for the newMainImage property value but I have no idea how to get at the media item so I can access my custom alternativeText property on it.
Hopefully this is something pretty simple, but I'm drawing a blank everywhere I look....?
I've found something that seems to work, I'm just not sure if it's a good way to do it...
// Make sure there is alt text on the main image
var mainImage = blogArticleEntity.GetValue("newMainImage");
if (mainImage != null)
{
var mainImageUdi = Udi.Parse((string)mainImage);
using (var contextReference = _contextFactory.EnsureUmbracoContext())
{
var mainImageMediaItem = contextReference.UmbracoContext.Media.GetById(mainImageUdi);
if (mainImageMediaItem != null)
{
var mainImageAltText = mainImageMediaItem.Value<string>("alternativeText");
if (string.IsNullOrWhiteSpace(mainImageAltText))
{
e.CancelOperation(new EventMessage("Main Image", "The main image is missing alternative text", messageType: EventMessageType.Error));
break;
}
}
}
}
Is there a better way to do it or does this look like a sensible way?
How to get a media item when in a publishing event handler
I have a custom publishing component that I use for some custom validation.
In this handler I'm applying some validation to some simple fields such as checked publishing dates and keywords.
Here's a snippet of the code:
The keywords and publish date validation is working fine, but I can't work out for the life of me how to get the newMainImage media item.
As you can see I can get something for the newMainImage property value but I have no idea how to get at the media item so I can access my custom alternativeText property on it.
Hopefully this is something pretty simple, but I'm drawing a blank everywhere I look....?
I've found something that seems to work, I'm just not sure if it's a good way to do it...
Is there a better way to do it or does this look like a sensible way?
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