Implement transport management in DirectorWorker: Enhanced the start_transports_stub function to handle transport planning for inventory items associated with a director. Added error handling for transport initiation and improved database interactions for inventory management, ensuring accurate transport planning and logging of potential errors.

src/worker/director.rs

@@ -378,7 +378,12 @@ impl DirectorWorker {
                     "[DirectorWorker] Starte Transportprüfung für Director {} (branch_id={})",
                     director.id, director.branch_id
                 );
-                self.start_transports_stub(&director);
+                if let Err(err) = self.start_transports_stub(&director) {
+                    eprintln!(
+                        "[DirectorWorker] Fehler bei start_transports für Director {}: {err}",
+                        director.id
+                    );
+                }
             }
             if director.may_sell {
                 eprintln!(
@@ -665,8 +670,57 @@ impl DirectorWorker {
         Ok(())
     }
 
-    fn start_transports_stub(&self, _director: &Director) {
-        // TODO: Transportlogik bei Bedarf aus dem C++-Code nachziehen.
+    fn start_transports_stub(&mut self, director: &Director) -> Result<(), DbError> {
+        self.base
+            .set_current_step("DirectorWorker: start_transports");
+
+        let mut conn = self
+            .base
+            .pool
+            .get()
+            .map_err(|e| DbError::new(format!("DB-Verbindung fehlgeschlagen: {e}")))?;
+
+        conn.prepare("get_to_transport", QUERY_GET_INVENTORY)?;
+        let rows = conn.execute("get_to_transport", &[&director.id, &director.branch_id])?;
+
+        let mut items: Vec<InventoryItem> =
+            rows.into_iter().filter_map(Self::map_row_to_inventory_item).collect();
+
+        // Falls es nichts zu transportieren gibt, können wir sofort zurückkehren.
+        if items.is_empty() {
+            return Ok(());
+        }
+
+        // Für alle Items dieses Directors sollten die user_id-Felder identisch
+        // sein (Arbeitgeber des Directors).
+        let falukant_user_id = items[0].user_id;
+
+        // Lohnende Transporte planen. Dabei werden:
+        // - ggf. Transport-Einträge erzeugt
+        // - Inventar-Mengen reduziert
+        for item in items.iter_mut() {
+            let shipped = self.plan_transports_for_item(
+                &mut conn,
+                falukant_user_id,
+                item,
+            )?;
+
+            if shipped > 0 {
+                if shipped >= item.quantity {
+                    // Alles wurde in Transporte umgewandelt, Inventar komplett entfernen.
+                    conn.prepare("remove_inventory", QUERY_REMOVE_INVENTORY)?;
+                    conn.execute("remove_inventory", &[&item.id])?;
+                    item.quantity = 0;
+                } else {
+                    // Inventar-Menge in der DB reduzieren und im Item anpassen.
+                    let remaining = item.quantity - shipped;
+                    Self::update_inventory_quantity(&mut conn, item.id, remaining)?;
+                    item.quantity = remaining;
+                }
+            }
+        }
+
+        Ok(())
     }
 
     fn start_sellings(&mut self, director: &Director) -> Result<(), DbError> {