Start to implement the save_all method.

backend/infrastructure/src/common/database_initialisation.rs

@@ -11,18 +11,18 @@ pub fn initialise_database_tables(connection: &Arc<Mutex<Connection>>) -> Result
                     id TEXT PRIMARY KEY,
                     initialisation_code VARCHAR
             );
-            CREATE TABLE IF NOT EXISTS system_resources (
-                id TEXT PRIMARY KEY,
-                datetime INTEGER NOT NULL,
-                cpu_usage INTEGER NOT NULL,
-                total_memory INTEGER NOT NULL,
-                used_memory INTEGER NOT NULL
-            );
             CREATE TABLE IF NOT EXISTS \"user\" (
                 id TEXT PRIMARY KEY,
                 username VARCHAR NOT NULL,
                 encrypted_password VARCHAR NOT NULL
             );
+            CREATE TABLE IF NOT EXISTS library_item (
+                id TEXT PRIMARY KEY,
+                name VARCHAR NOT NULL,
+                type INTEGER NOT NULL,
+                parent_folder_id TEXT NULL,
+                FOREIGN KEY (parent_folder_id) REFERENCES library_item (id)
+            );
             COMMIT;
             "
         )?;