Include servers in mutual route.

src/routes/users/find_mutual.rs

@@ -30,5 +30,33 @@ pub async fn req(user: User, target: Ref) -> Result<Value> {
         .filter_map(|x| x.get_str("_id").ok().map(|x| x.to_string()))
         .collect::<Vec<String>>();
     
-    Ok(json!({ "users": users }))
+    let server_ids = User::fetch_server_ids(&user.id).await?;
+    let servers = get_collection("server_members")
+        .find(
+            doc! {
+                "_id.user": &target.id,
+                "_id.server": {
+                    "$in": server_ids
+                }
+            },
+            None
+        )
+        .await
+        .map_err(|_| Error::DatabaseError {
+            operation: "find_one",
+            with: "server_members",
+        })?
+        .filter_map(async move |s| s.ok())
+        .collect::<Vec<Document>>()
+        .await
+        .into_iter()
+        .filter_map(|x| {
+            x.get_document("_id")
+                .ok()
+                .map(|i| i.get_str("server").ok().map(|x| x.to_string()))
+        })
+        .flatten()
+        .collect::<Vec<String>>();
+
+    Ok(json!({ "users": users, "servers": servers }))
 }