Refactor notification handling in Workers: Centralize notification insertion and frontend updates by replacing direct SQL queries with dedicated functions. This improves code maintainability and reduces redundancy across character creation, events, and transport processing.

src/worker/notify.rs

@@ -0,0 +1,45 @@
+use crate::db::{ConnectionPool, DbConnection, DbError};
+use crate::message_broker::MessageBroker;
+use crate::worker::sql::QUERY_INSERT_NOTIFICATION_FULL;
+
+/// Schreibt eine Notification in `falukant_log.notification`.
+///
+/// - `tr` ist ein (i.d.R. JSON-)String, den das Frontend parst.
+/// - `character_id` ist optional (NULL).
+pub fn insert_notification(
+    pool: &ConnectionPool,
+    user_id: i32,
+    tr: &str,
+    character_id: Option<i32>,
+) -> Result<(), DbError> {
+    let mut conn = pool
+        .get()
+        .map_err(|e| DbError::new(format!("DB-Verbindung fehlgeschlagen: {e}")))?;
+
+    insert_notification_conn(&mut conn, user_id, tr, character_id)?;
+    Ok(())
+}
+
+/// Variante für bestehende DB-Verbindungen (spart Connect/Prepare in Loops).
+pub fn insert_notification_conn(
+    conn: &mut DbConnection,
+    user_id: i32,
+    tr: &str,
+    character_id: Option<i32>,
+) -> Result<(), DbError> {
+    conn.prepare("insert_notification_full", QUERY_INSERT_NOTIFICATION_FULL)?;
+    conn.execute(
+        "insert_notification_full",
+        &[&user_id, &tr, &character_id],
+    )?;
+    Ok(())
+}
+
+/// Informiert das Frontend, dass sich der Status geändert hat (z.B. Branches neu laden).
+pub fn publish_update_status(broker: &MessageBroker, user_id: i32) {
+    broker.publish(format!(
+        r#"{{"event":"falukantUpdateStatus","user_id":{}}}"#,
+        user_id
+    ));
+}
+