feat: Checks only new users configuration

Signed-off-by: Awiteb <a@4rs.nl>

src/config.rs

@@ -144,6 +144,9 @@ pub struct Config {
     /// Dry run, without banning the users
     #[serde(default)]
     pub dry_run:        bool,
+    /// Only checks new users
+    #[serde(default)]
+    pub only_new_users: bool,
     /// Configuration for the forgejo guard itself
     pub forgejo:        Forgejo,
     /// Configuration of the telegram bot

src/main.rs

@@ -44,6 +44,7 @@ async fn try_main() -> error::GuardResult<()> {
 
     tracing::info!("The instance: {}", config.forgejo.instance);
     tracing::info!("Dry run: {}", config.dry_run);
+    tracing::info!("Only new users: {}", config.only_new_users);
     tracing::debug!("The config exprs: {:#?}", config.expressions);
 
     rust_i18n::set_locale(config.telegram.lang.as_str());

src/users_fetcher.rs

@@ -98,6 +98,7 @@ async fn check_new_users(
     sus_sender: Sender<ForgejoUser>,
     ban_sender: Sender<ForgejoUser>,
 ) {
+    let is_first_fetch = last_user_id.load(Ordering::Relaxed) == 0;
     match get_new_users(
         &request_client,
         last_user_id.load(Ordering::Relaxed),
@@ -112,7 +113,11 @@ async fn check_new_users(
 
             if let Some(uid) = new_users.iter().max_by_key(|u| u.id).map(|u| u.id) {
                 tracing::debug!("New last user id: {uid}");
-                last_user_id.store(uid, Ordering::Relaxed)
+                last_user_id.store(uid, Ordering::Relaxed);
+            }
+
+            if config.only_new_users && is_first_fetch {
+                return;
             }
 
             for user in new_users {