Add JoinRulesEvent.

src/room/mod.rs

@@ -216,3 +216,64 @@ pub enum HistoryVisibility {
     /// participating homeserver with anyone, regardless of whether they have ever joined the room.
     WorldReadable,
 }
+
+/// Describes how users are allowed to join the room.
+pub struct JoinRulesEvent<'a, 'b> {
+    content: JoinRulesEventContent<'a>,
+    event_id: &'a str,
+    prev_content: Option<JoinRulesEventContent<'b>>,
+    room_id: &'a str,
+    user_id: &'a str,
+}
+
+impl<'a, 'b> Event<'a, JoinRulesEventContent<'a>> for JoinRulesEvent<'a, 'b> {
+    fn content(&'a self) -> &'a JoinRulesEventContent<'a> {
+        &self.content
+    }
+
+    fn event_type(&self) -> &'static str {
+        "m.room.join_rules"
+    }
+}
+
+impl<'a, 'b> RoomEvent<'a, JoinRulesEventContent<'a>> for JoinRulesEvent<'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, JoinRulesEventContent<'a>> for JoinRulesEvent<'a, 'b> {
+    fn prev_content(&'a self) -> Option<&'b JoinRulesEventContent> {
+        match self.prev_content {
+            Some(ref prev_content) => Some(prev_content),
+            None => None,
+        }
+    }
+}
+
+/// The payload of a `JoinRulesEvent`.
+pub struct JoinRulesEventContent<'a> {
+    /// The type of rules used for users wishing to join this room.
+    join_rule: &'a JoinRules,
+}
+
+/// The rule used for users wishing to join this room.
+pub enum JoinRules {
+    /// A user who wishes to join the room must first receive an invite to the room from someone
+    /// already inside of the room.
+    Invite,
+    /// Reserved but not yet implemented by the Matrix specification.
+    Knock,
+    /// Reserved but not yet implemented by the Matrix specification.
+    Private,
+    /// Anyone can join the room without any prior action.
+    Public,
+}