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+# Event handling
+V2 of Houdini will have an event based system as described in #113. Events are ONE-WAY notifications from a publisher to a subscriber. We wrap `ActiveSupport::Notifications` a custom class called `Houdini::Notifications` (there's a chance we'll want to use a different notification system at some point).
+
+Unless there is a very good reason, the data necessary for handling the event should be passed in as actual objects and attributes, not references to a database key. The idea is that you shouldn't have to worry about additional changes to entities being made before you can react to the event.
+
+
+## Campaign
+
+### Campaign created
+
+* Nonprofit
+* Campaign
+* Campaign creator user
+* Campaign creator profile
+* campaign_url
+
+### Campaign Modified
+
+* Nonprofit
+* Campaign
+* Campaign creator user
+* Campaign creator profile
+* campaign_url
+
+### Campaign Deleted
+
+* Nonprofit
+* Campaign
+* Campaign creator user
+* Campaign creator profile
+* campaign_url
+
+## Campaign Gift Option
+
+## Disputes
+
+## Donation
+
+## Event
+
+* Nonprofit
+* Event
+* Event creator user
+* Event creator profile
+* event_url
+
+## Export
+
+* Nonprofit
+* Requestor
+* Payments (when finished)
+* Export
+
+## Import
+
+* Nonprofit
+* Requestor
+* Payments (when finished)
+* Import
+
+## Nonprofit
+
+* Nonprofit
+* 
+
+### Create
+
+
+
+
+## Payout
+
+* Nonprofit
+* Bank Account
+* Payout
+* Payments related
+* Supporters
+
+(This one might be difficult to provide all information in message)
+
+## Recurring Donation
+
+* Donation
+* Recurring Donation
+* Payments for the donations
+* Nonprofit
+* Supporter
+* Payment Method (card)
+
+## Refund
+
+* Donation
+* Refund
+* Payments for the donations and refunds
+* Nonprofit
+* Supporter
+* Payment Method (card)
+
+## Roles
+* Host (nonprofit, event, campaign)
+* Role Itself
+* User
+
+## Supporter
+
+* Nonprofit
+* Supporter
+
+
+## Tag
+
+## Ticket (This should be split into Ticket and Ticket purchase)
+
+
+## User
+
+* User
+* User Profile
+
+
+# Subscribers
+
+Subscribers must be short running pieces of code. Any lengthy operations should be put on a background through through a job.