project service

water-api/src/services/project.service.ts

@@ -236,11 +236,21 @@ export async function update(id: string, data: UpdateProjectInput): Promise<Proj
 
 /**
  * Delete a project by ID
- * Checks for dependent meters/concentrators before deletion
+ * Checks for dependent meters/concentrators/users before deletion
  * @param id - Project UUID
  * @returns True if deleted, throws error if has dependencies
  */
 export async function deleteProject(id: string): Promise<boolean> {
+  const userCheck = await query<{ count: string }>(
+    'SELECT COUNT(*) as count FROM users WHERE project_id = $1',
+    [id]
+  );
+  const userCount = parseInt(userCheck.rows[0]?.count || '0', 10);
+
+  if (userCount > 0) {
+    throw new Error(`Cannot delete project: ${userCount} user(s) are assigned to this project`);
+  }
+
   // Check for dependent meters
   const meterCheck = await query<{ count: string }>(
     'SELECT COUNT(*) as count FROM meters WHERE project_id = $1',