Add ThirdPartyInviteEvent.

src/room/third_party_invite.rs

@@ -1,2 +1,61 @@
 //! Types for the *m.room.third_party_invite* event.
 
+use core::{Event, EventType, RoomEvent, StateEvent};
+
+/// An invitation to a room issued to a third party identifier, rather than a matrix user ID.
+///
+/// Acts as an *m.room.member* invite event, where there isn't a target user_id to invite. This
+/// event contains a token and a public key whose private key must be used to sign the token. Any
+/// user who can present that signature may use this invitation to join the target room.
+pub struct ThirdPartyInviteEvent<'a, 'b> {
+    content: ThirdPartyInviteEventContent<'a>,
+    event_id: &'a str,
+    prev_content: Option<ThirdPartyInviteEventContent<'b>>,
+    room_id: &'a str,
+    state_key: &'a str,
+    user_id: &'a str,
+}
+
+impl<'a, 'b> Event<'a, ThirdPartyInviteEventContent<'a>> for ThirdPartyInviteEvent<'a, 'b> {
+    fn content(&'a self) -> &'a ThirdPartyInviteEventContent<'a> {
+        &self.content
+    }
+
+    fn event_type(&self) -> EventType {
+        EventType::RoomThirdPartyInvite
+    }
+}
+
+impl<'a, 'b> RoomEvent<'a, ThirdPartyInviteEventContent<'a>> for ThirdPartyInviteEvent<'a, 'b> {
+    fn event_id(&'a self) -> &'a str {
+        &self.event_id
+    }
+
+    fn room_id(&'a self) -> &'a str {
+        &self.room_id
+    }
+
+    fn user_id(&'a self) -> &'a str {
+        &self.user_id
+    }
+}
+
+impl<'a, 'b> StateEvent<'a, 'b, ThirdPartyInviteEventContent<'a>> for ThirdPartyInviteEvent<'a, 'b> {
+    fn prev_content(&'a self) -> Option<&'b ThirdPartyInviteEventContent> {
+        match self.prev_content {
+            Some(ref prev_content) => Some(prev_content),
+            None => None,
+        }
+    }
+
+    fn state_key(&self) -> &'a str {
+        &self.state_key
+    }
+}
+
+/// The payload of a `ThirdPartyInviteEvent`.
+pub struct ThirdPartyInviteEventContent<'a> {
+    display_name: &'a str,
+    key_validity_url: &'a str,
+    public_key: &'a str,
+}