feat: resetting the timeline when an ignore user list event is received

bindings/matrix-sdk-ffi/src/sliding_sync.rs

@@ -2,7 +2,7 @@ use std::sync::{Arc, RwLock};
 
 use anyhow::Context;
 use eyeball_im::VectorDiff;
-use futures_util::{future::join3, pin_mut, StreamExt};
+use futures_util::{future::join4, pin_mut, StreamExt};
 use matrix_sdk::ruma::{
     api::client::sync::sync_events::{
         v4::RoomSubscription as RumaRoomSubscription,
@@ -229,9 +229,26 @@ impl SlidingSyncRoom {
             }
         };
 
+        // This in the future could be removed, and the rx handling could be moved
+        // inside handle_sliding_sync_reset since we want to reset the sliding
+        // sync for ignore user list events
+        let handle_ignore_user_list_changes = {
+            let ignore_user_list_change_rx = self.client.subscribe_to_ignore_user_list_changes();
+            let timeline = timeline.to_owned();
+            async move {
+                ignore_user_list_change_rx.for_each(|_| timeline.clear()).await;
+            }
+        };
+
         let items = timeline_items.into_iter().map(TimelineItem::from_arc).collect();
         let task_handle = TaskHandle::new(RUNTIME.spawn(async move {
-            join3(handle_events, handle_sliding_sync_reset, handle_sync_gap).await;
+            join4(
+                handle_events,
+                handle_sliding_sync_reset,
+                handle_sync_gap,
+                handle_ignore_user_list_changes,
+            )
+            .await;
         }));
 
         Ok((items, task_handle))

crates/matrix-sdk-base/src/client.rs

@@ -13,15 +13,16 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#[cfg(feature = "e2e-encryption")]
+use std::ops::Deref;
 use std::{
     borrow::Borrow,
     collections::{BTreeMap, BTreeSet},
     fmt,
+    sync::Arc,
 };
-#[cfg(feature = "e2e-encryption")]
-use std::{ops::Deref, sync::Arc};
 
-use eyeball::Subscriber;
+use eyeball::{shared::Observable as SharedObservable, Subscriber};
 use matrix_sdk_common::instant::Instant;
 #[cfg(feature = "e2e-encryption")]
 use matrix_sdk_crypto::{
@@ -89,6 +90,7 @@ pub struct BaseClient {
     /// [`BaseClient::set_session_meta`]
     #[cfg(feature = "e2e-encryption")]
     olm_machine: OnceCell<OlmMachine>,
+    pub(crate) ignore_user_list_changes_tx: Arc<SharedObservable<()>>,
 }
 
 #[cfg(not(tarpaulin_include))]
@@ -120,6 +122,7 @@ impl BaseClient {
             crypto_store: config.crypto_store,
             #[cfg(feature = "e2e-encryption")]
             olm_machine: Default::default(),
+            ignore_user_list_changes_tx: Default::default(),
         }
     }
 
@@ -894,6 +897,9 @@ impl BaseClient {
     }
 
     pub(crate) async fn apply_changes(&self, changes: &StateChanges) {
+        if changes.account_data.contains_key(&GlobalAccountDataEventType::IgnoredUserList) {
+            self.ignore_user_list_changes_tx.set(());
+        }
         for (room_id, room_info) in &changes.room_infos {
             if let Some(room) = self.store.get_room(room_id) {
                 room.update_summary(room_info.clone())
@@ -1227,6 +1233,12 @@ impl BaseClient {
             push_rules.notification_power_levels = room_power_levels.notifications;
         }
     }
+
+    /// Returns a subscriber that publishes an event every time the ignore user
+    /// list changes
+    pub fn subscribe_to_ignore_user_list_changes(&self) -> Subscriber<()> {
+        self.ignore_user_list_changes_tx.subscribe()
+    }
 }
 
 impl Default for BaseClient {

crates/matrix-sdk/src/client/mod.rs

@@ -210,6 +210,12 @@ impl Client {
             .map_err(ClientBuildError::assert_valid_builder_args)
     }
 
+    /// Returns a subscriber that publishes an event every time the ignore user
+    /// list changes.
+    pub fn subscribe_to_ignore_user_list_changes(&self) -> Subscriber<()> {
+        self.inner.base_client.subscribe_to_ignore_user_list_changes()
+    }
+
     /// Create a new [`ClientBuilder`].
     pub fn builder() -> ClientBuilder {
         ClientBuilder::new()