How to subscribe to RSS via email?

Help / Discuss
1

I’m trying to generate emails based on an RSS feed. The use case is I have a group who needs to monitor changes to pages based on a tag. I know that I can create an RSS feed, and I know how to get emails based on the watchlist, but I can’t see a way to tie these two features together.

Is it possible to add an RSS feed to a user’s watchlist so they get emails based on changes to the tagged pages?

2

Hi,

the easiest for that is probably to use a Notification filter so that any changes on a tagged page is sent as a notification email.
I can see two ways for doing that:

  1. By iterating over the tagged pages and your users to create the dedicated Notification filters for those pages for all of your users. You’ll need to create again a new filter for any page new page with the tag etc. That might be a bit tedious in terms of maintenance.
  2. You create a dedicated Notification filter that checks when a document event arrives and check the tag of the event for keeping the notification / sending an email.

In both cases you’ll need to write some code, option 2 is probably better on the long run for maintenability and it’s actually something you could share with the community since it would work for any tag.
In any case you should read the documentation about notification and notification API (https://extensions.xwiki.org/xwiki/bin/view/Extension/Notifications%20Application/#HFilters). Actually we don’t have much doc for creating them in https://extensions.xwiki.org/xwiki/bin/view/Extension/Notifications%20API/. You can check xwiki-platform/xwiki-platform-core/xwiki-platform-notifications/xwiki-platform-notifications-filters/xwiki-platform-notifications-filters-api/src/main/java/org/xwiki/notifications/filters/NotificationFilter.java at master · xwiki/xwiki-platform · GitHub that’s the class to implement to create a filter, implementing the method filterEvent is enough here.

3

Surli,

Thanks, it sounds like I’m not just missing something in the docs, it doesn’t actually exist yet. I’m not a Java guy, so I’ll have to ask around and see if there’s anyone looking for a side project. Thanks for the pointers.