Add GuestAccessEvent.

src/room/guest_access.rs

@@ -1 +1,65 @@
 //! Types for the *m.room.guest_access* event.
+
+use core::{Event, EventType, RoomEvent, StateEvent};
+
+/// Controls whether guest users are allowed to join rooms.
+///
+/// This event controls whether guest users are allowed to join rooms. If this event is absent,
+/// servers should act as if it is present and has the value `GuestAccess::Forbidden`.
+pub struct GuestAccessEvent<'a, 'b> {
+    content: GuestAccessEventContent<'a>,
+    event_id: &'a str,
+    prev_content: Option<GuestAccessEventContent<'b>>,
+    room_id: &'a str,
+    user_id: &'a str,
+}
+
+impl<'a, 'b> Event<'a, GuestAccessEventContent<'a>> for GuestAccessEvent<'a, 'b> {
+    fn content(&'a self) -> &'a GuestAccessEventContent<'a> {
+        &self.content
+    }
+
+    fn event_type(&self) -> EventType {
+        EventType::RoomGuestAccess
+    }
+}
+
+impl<'a, 'b> RoomEvent<'a, GuestAccessEventContent<'a>> for GuestAccessEvent<'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, GuestAccessEventContent<'a>> for GuestAccessEvent<'a, 'b> {
+    fn prev_content(&'a self) -> Option<&'b GuestAccessEventContent> {
+        match self.prev_content {
+            Some(ref prev_content) => Some(prev_content),
+            None => None,
+        }
+    }
+
+    fn state_key(&self) -> &'a str {
+        ""
+    }
+}
+
+/// The payload of a `GuestAccessEvent`.
+pub struct GuestAccessEventContent<'a> {
+    guest_access: &'a GuestAccess,
+}
+
+/// A policy for guest user access to a room.
+pub enum GuestAccess {
+    /// Guests are allowed to join the room.
+    CanJoin,
+    /// Guests are not allowed to join the room.
+    Forbidden,
+}