Propagate read receipt events

matrixgw_backend/src/controllers/ws_controller.rs

@@ -29,6 +29,19 @@ pub struct WsRoomEvent<E> {
     pub data: Box<E>,
 }
 
+#[derive(Debug, serde::Serialize)]
+pub struct WsReceiptEntry {
+    event: OwnedEventId,
+    user: OwnedUserId,
+    ts: Option<MilliSecondsSinceUnixEpoch>,
+}
+
+#[derive(Debug, serde::Serialize)]
+pub struct WsReceiptEvent {
+    pub room_id: OwnedRoomId,
+    pub receipts: Vec<WsReceiptEntry>,
+}
+
 /// Messages sent to the client
 #[derive(Debug, serde::Serialize)]
 #[serde(tag = "type")]
@@ -41,6 +54,9 @@ pub enum WsMessage {
 
     /// Room reaction event
     RoomRedactionEvent(WsRoomEvent<RoomRedactionEventContent>),
+
+    /// Fully read message event
+    ReceiptEvent(WsReceiptEvent),
 }
 
 impl WsMessage {
@@ -73,6 +89,25 @@ impl WsMessage {
                     data: Box::new(evt.data.content.clone()),
                 }))
             }
+            BroadcastMessage::ReceiptEvent(evt) if &evt.user == user => {
+                let mut receipts = vec![];
+                for (event_id, r) in &evt.data.content.0 {
+                    for user_receipts in r.values() {
+                        for (user, receipt) in user_receipts {
+                            receipts.push(WsReceiptEntry {
+                                event: event_id.clone(),
+                                user: user.clone(),
+                                ts: receipt.ts,
+                            })
+                        }
+                    }
+                }
+
+                Some(Self::ReceiptEvent(WsReceiptEvent {
+                    room_id: evt.room.room_id().to_owned(),
+                    receipts,
+                }))
+            }
             _ => None,
         }
     }