Events in ActivityPub

Sebastian · October 2, 2020, 10:41am

LONG story SHORT: It’s an oldie, I think the same:

What is the best flow to federate events and which interactions might be involved …

aschrijver · October 2, 2020, 10:45am

FYI: Here are all events-related AP apps. If there are more, ping me on @humanetech and I’ll add them to the list.

Sebastian · October 5, 2020, 9:39am

This was a smaller group due to overlapping subjects but to less timeslots.
The group talked about federating Events and played with gath.io where you can see this live result
https://mastodon.social/web/accounts/1288867#
= https://gath.io/k5rT8u3GbjmQsy1NHWLMT/m/featuredPost

Shared Notes from the session

Generic ActivityStreams 2.0 Event:

{
  "@context": "https://www.w3.org/ns/activitystreams",
  "type": "Event",
  "name": "Movie Night",
  "startTime": "2014-12-31T23:00:00-08:00",
  "endTime": "2015-01-01T06:00:00-08:00"
}

https://gath.io
https://events.friend.camp

github.com

lowercasename/gathio/blob/6eae89562c56aa5d2b6fcd8435c2f85089b316b0/FEDERATION.md

# Federation

This document is meant to be a reference for all the ActivityPub federation-related behavior that gath.io has. This means: every user action that can trigger an Activity, every Object that is created and sent out and/or stored.

## Documentation conventions

To keep things simple, sometimes you will see things formatted like `Create/Note` or `Delete/Event` or `Undo/Follow`. The thing before the slash is the Activity, and the thing after the slash is the Object inside the Activity, in an `object` property. So these are to be read as follows:

* `Create/Note`: a `Create` activity containing a `Note` in the `object` field 
* `Delete/Event`: a `Delete` activity containing an `Event` in the `object` field
* `Undo/Follow`: an `Undo` activity containing a `Follow` in the `object` field

When the word "broadcast" is used in this document, it means to send an Activity to individual inbox of each of the followers of a given Actor.

This document has four main sections:

* __Federation philosophy__ lays out the general model of how this is intended to federate
* __General Actor information__ contains the basics of what to expect from our `Actor` objects
* __Inbox behavior__ lists every incoming ActivityPub activity that the server recognizes, and tells you what it does in response to that activity, including any other ActivityPub activities it sends back out.
* __Activities triggered from the web app__ tells you what circumstances on the web application cause the server to emit ActivityPub activities. (For example, when an event is updated via the web application, it lets all the ActivityPub followers know that the event has been updated.)

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