Method operate

KeepChatGPT.user.js:281–316

(operation, item)

        }

        async operate(operation, item) {
            const db = await this.open();
            return new Promise((resolve, reject) => {
                const tx = db.transaction(this.storeName, "readwrite");
                const store = tx.objectStore(this.storeName);
                let request;

                switch (operation) {
                    case "add":
                        request = store.add(item);
                        break;
                    case "put":
                        request = store.put(item);
                        break;
                    case "delete":
                        request = store.delete(item.id);
                        break;
                    default:
                        db.close();
                        reject("Invalid operation");
                        return;
                }

                request.onsuccess = function () {
                    resolve(request.result);
                };

                request.onerror = function () {
                    reject("Error", request.error);
                };

                tx.oncomplete = function () {
                    db.close();
                };
            });
        }

        async operate_get(id) {
            const db = await this.open();