crypto: Include UTD cause in FFI EncryptedMessage

Author: andybalaam

bindings/matrix-sdk-ffi/src/timeline/content.rs

@@ -14,7 +14,7 @@
 
 use std::{collections::HashMap, sync::Arc};
 
-use matrix_sdk::room::power_levels::power_level_user_changes;
+use matrix_sdk::{crypto::types::events::UtdCause, room::power_levels::power_level_user_changes};
 use matrix_sdk_ui::timeline::{PollResult, TimelineDetails};
 use tracing::warn;
 
@@ -214,6 +214,10 @@ pub enum EncryptedMessage {
     MegolmV1AesSha2 {
         /// The ID of the session used to encrypt the message.
         session_id: String,
+
+        /// What we know about what caused this UTD. E.g. was this event sent
+        /// when we were not a member of this room?
+        cause: UtdCause,
     },
     Unknown,
 }
@@ -227,9 +231,9 @@ impl EncryptedMessage {
                 let sender_key = sender_key.clone();
                 Self::OlmV1Curve25519AesSha2 { sender_key }
             }
-            Message::MegolmV1AesSha2 { session_id, .. } => {
+            Message::MegolmV1AesSha2 { session_id, cause, .. } => {
                 let session_id = session_id.clone();
-                Self::MegolmV1AesSha2 { session_id }
+                Self::MegolmV1AesSha2 { session_id, cause: *cause }
             }
             Message::Unknown => Self::Unknown,
         }