Sync and async middleware to manipulate scoped services from DI

[we4sz]

I'm trying to manipulate a scoped class in the ISlackRequestListener. Unfortunately it seems like all request has the same scope which makes it hard to use data from the request in the eventlisteners after.

What I'm trying to do, maybe it exists an easier way is to extract my ApplicationUser from the database based on the slack userid in the request so I don't need to do that in every handler.

Maybe someone here has a better solution for that?

[we4sz]

I'm using SockerMode right now, maybe that's why it doesn't create new scopes per request, but I still think it should to that.

But a strategy to create middlewares would be really nice

[soxtoby]

Hi @we4sz, ISlackRequestListener is the hook used to create request scopes, so it's necessarily a singleton. Additionally, Slack sends a number of different types of requests with quite different structures, and only some of them contain user information, so there's no generic way to get the user ID for a request.

For your purposes, I'd probably recommend either decorating your specific handlers, or using one of the Replace* methods on the SlackNet configuration to replace the root handler (you'll need to construct and delegate to one of the default handlers inside your replacement). Both the root handlers and the specific handlers are scoped to the request.

Hope this helps. Let me know if you need any help with the specifics.