add user_count in systemlog

src/api/systemlog.rs

@@ -1,4 +1,6 @@
 use crate::api::{CurrentUser, JsonApi};
+use crate::cache::cached_user_count;
+use crate::db_conn::Db;
 use crate::random_hasher::RandomHasher;
 use crate::rds_conn::RdsConn;
 use crate::rds_models::{get_admin_list, get_candidate_list, Systemlog};
@@ -6,13 +8,19 @@ use rocket::serde::json::{json, Value};
 use rocket::State;
 
 #[get("/systemlog")]
-pub async fn get_systemlog(user: CurrentUser, rh: &State<RandomHasher>, rconn: RdsConn) -> JsonApi {
+pub async fn get_systemlog(
+    user: CurrentUser,
+    rh: &State<RandomHasher>,
+    db: Db,
+    mut rconn: RdsConn,
+) -> JsonApi {
     let logs = Systemlog::get_list(&rconn, 50).await?;
 
     Ok(json!({
         "tmp_token": rh.get_tmp_token(),
         "salt": look!(rh.salt),
         "start_time": rh.start_time.timestamp(),
+        "user_count": cached_user_count(&db, &mut rconn).await?,
         "custom_title": user.custom_title,
         "admin_list": get_admin_list(&rconn).await?,
         "candidate_list": get_candidate_list(&rconn).await?,