Subscribe to comments of blogs: Implement ICommentNotificationsStrategy interface

You need to implement the ICommentNotificationsStrategy interface with a new CustomCommentNotificationsStrategy class that inherits from the  Telerik.Sitefinity.Services.Comments.Impl.Notifications.CommentNotificationsStrategy. The methods of ICommentNotificationsStrategy for subscriptions expect a SubscriptionDataobject as a parameter. You can extend the SubscriptionData class to provide any additional information that you need to use, in this case - this parameter is the ID of the parent blog.

Next, you provide custom subscription keys. Sitefinity CMS uses different patterns for constructing the subscription keys for the different types of subscription. That is, the structure of the subscription key used for notification by thread differs from the structure of the subscription key used for notification by thread type. The unique structure of the subscription keys enables you to get the subscription list that is associated with certain event. You can extend the SubscriptionData class to provide any additional information that you need to use, in this case - this parameter is the ID of the parent blog.

You need to provide a unique pattern for constructing the subscription keys associated with the custom notification strategy and to integrate them with the existing notification types.

By default, when comment event occurs, Sitefinity CMS notifies all subscribers that have subscribed for the respective thread key or type. In this case, the subscribers need to also be notified that they have subscribed for comments on items with a specific parent ID.

To do this:

1. In Visual Studio, open your Sitefinity CMS project.
2. In the context menu of the project, click Add » Class.
3. Name the class CustomCommentNotificationsStrategy.
4. Add the following code: