matrix-sdk-base: Add method to get all members from the store

matrix_sdk_base/src/rooms/normal.rs

@@ -261,6 +261,22 @@ impl Room {
         self.store.get_joined_user_ids(self.room_id()).await
     }
 
+    /// Get the all `RoomMember`s of this room that are known to the store.
+    pub async fn members(&self) -> StoreResult<Vec<RoomMember>> {
+        let user_ids = self.store.get_user_ids(self.room_id()).await?;
+        let mut members = Vec::new();
+
+        for u in user_ids {
+            let m = self.get_member(&u).await?;
+
+            if let Some(member) = m {
+                members.push(member);
+            }
+        }
+
+        Ok(members)
+    }
+
     /// Get the list of `RoomMember`s that are considered to be joined members
     /// of this room.
     pub async fn joined_members(&self) -> StoreResult<Vec<RoomMember>> {

matrix_sdk_base/src/store/memory_store.rs

@@ -270,6 +270,14 @@ impl MemoryStore {
             .and_then(|m| m.get(state_key).map(|m| m.clone())))
     }
 
+    fn get_user_ids(&self, room_id: &RoomId) -> Vec<UserId> {
+        #[allow(clippy::map_clone)]
+        self.members
+            .get(room_id)
+            .map(|u| u.iter().map(|u| u.key().clone()).collect())
+            .unwrap_or_default()
+    }
+
     fn get_invited_user_ids(&self, room_id: &RoomId) -> Vec<UserId> {
         #[allow(clippy::map_clone)]
         self.invited_user_ids
@@ -345,6 +353,10 @@ impl StateStore for MemoryStore {
         self.get_member_event(room_id, state_key).await
     }
 
+    async fn get_user_ids(&self, room_id: &RoomId) -> Result<Vec<UserId>> {
+        Ok(self.get_user_ids(room_id))
+    }
+
     async fn get_invited_user_ids(&self, room_id: &RoomId) -> Result<Vec<UserId>> {
         Ok(self.get_invited_user_ids(room_id))
     }

matrix_sdk_base/src/store/mod.rs

@@ -153,6 +153,9 @@ pub trait StateStore: AsyncTraitDeps {
         state_key: &UserId,
     ) -> Result<Option<MemberEvent>>;
 
+    /// Get all the user ids of members for a given room.
+    async fn get_user_ids(&self, room_id: &RoomId) -> Result<Vec<UserId>>;
+
     /// Get all the user ids of members that are in the invited state for a
     /// given room.
     async fn get_invited_user_ids(&self, room_id: &RoomId) -> Result<Vec<UserId>>;

matrix_sdk_base/src/store/sled_store/mod.rs

@@ -527,6 +527,13 @@ impl SledStore {
             .transpose()?)
     }
 
+    pub async fn get_user_ids(&self, room_id: &RoomId) -> impl Stream<Item = Result<UserId>> {
+        stream::iter(self.members.scan_prefix(room_id.encode()).map(|u| {
+            UserId::try_from(String::from_utf8_lossy(&u?.1).to_string())
+                .map_err(StoreError::Identifier)
+        }))
+    }
+
     pub async fn get_invited_user_ids(
         &self,
         room_id: &RoomId,
@@ -632,6 +639,10 @@ impl StateStore for SledStore {
         self.get_member_event(room_id, state_key).await
     }
 
+    async fn get_user_ids(&self, room_id: &RoomId) -> Result<Vec<UserId>> {
+        self.get_user_ids(room_id).await.try_collect().await
+    }
+
     async fn get_invited_user_ids(&self, room_id: &RoomId) -> Result<Vec<UserId>> {
         self.get_invited_user_ids(room_id).await.try_collect().await
     }