Seems like there's something being built in that direction already:

http://github.com/jtauber/django-notification/tree/master

Will investigate further. I might be able to port my stuff to theirs.

On Thu, Aug 13, 2009 at 8:01 PM, Helder Ribeiro<hel...@gmail.com> wrote:
> Hi guys,
>
> I'm also about to embark into developing something a little big, so
> I'd like to get some eyeballs on my idea before hammering at it. If
> you could take a few moments to go over it and give me suggestions, I
> would greatly appreciate it. I've also posted this on StackOverflow,
> if you're into that kind of thing :)
> http://stackoverflow.com/questions/1275077/user-configurable-signalling-mechanism-in-django.
>
>  Here goes:
>
> I need to allow an arbitrary Principal (User, Group, Site Admin) to
> add Event Sinks (like email addresses, Webhook URLs, etc.) to the
> system (through the web interface) and, for each one, specify which
> kinds of <Event Source, Event Type> should be sent to it. Since I'm
> doing this for ReviewBoard, I'll give a concrete example with a
> hypothetical implementation:
>
>   1. John creates a new event_sink (a webhook), identified by postbin1;
>   2. John specifies that postbin1 will receive events of type publish
> on ReviewRequests (a class-level subscription -- the source_id is
> unspecified);
>   3. When a new review_request is created, the Event Manager, lists
> (through a JOIN with subscriptions) all event_sinks interested in
> ReviewRequests and creates a (instance-level) subscription binding
> them as a listener to their particular event_type (the name of a
> django signal) of interest and to the specific review_request;
>   4. When that review_request gets published, the Event Manager (who
> listens to the publish signal) lists all event_sinks interested in
> that review_request instance and the publish signal and dispatches the
> signal parameters to their sink method.
>   5. The Webhook event_sink marshals the data however pleases it and
> POSTs it to its URL.
>
> The schema I thought of is attached. If you can't see it, it's also
> at: http://bayimg.com/image/aadgoaacd.jpg
>
> I'm about to start implementing this myself, but I just want to make
> sure I'm not reinventing the wheel. Couldn't find anything on Google.
> Ready-to-use package names, half-way package names that will help me,
> and/or criticism to my DIY approach are all welcome.
>
> Thanks a lot!
>
> Helder
>
> http://helderribeiro.net
>

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