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// Copyright 2022 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
import { Device } from 'pigweedjs';
import { createDefaultProtoCollection } from './protos';
/**
* Returns an instance of Device, ensures there is only one Device in
* current session.
*
* We do this to avoid multiple clients listening on single serial port.
*/
export default async function SingletonDevice(): Promise<Device> {
if ((window as any).device === undefined) {
const protoCollection = await createDefaultProtoCollection();
(window as any).device = new Device(protoCollection);
}
return (window as any).device;
}
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