69 lines
1.5 KiB
TypeScript
69 lines
1.5 KiB
TypeScript
// Copyright 2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { join } from 'path';
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import { Worker } from 'worker_threads';
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export type WrappedWorkerRequest = {
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readonly uuid: string;
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readonly data: ArrayBuffer;
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};
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export type WrappedWorkerResponse = {
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readonly uuid: string;
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readonly error: string | undefined;
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readonly response?: File;
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};
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const ASAR_PATTERN = /app\.asar$/;
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export function getHeicConverter(): (
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uuid: string,
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data: ArrayBuffer
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) => Promise<WrappedWorkerResponse> {
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let appDir = join(__dirname, '..', '..');
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let isBundled = false;
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if (ASAR_PATTERN.test(appDir)) {
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appDir = appDir.replace(ASAR_PATTERN, 'app.asar.unpacked');
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isBundled = true;
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}
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const scriptDir = join(appDir, 'ts', 'workers');
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const worker = new Worker(
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join(
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scriptDir,
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isBundled ? 'heicConverter.bundle.js' : 'heicConverterWorker.js'
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)
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);
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const ResponseMap = new Map<
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string,
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(response: WrappedWorkerResponse) => void
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>();
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worker.on('message', (wrappedResponse: WrappedWorkerResponse) => {
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const { uuid } = wrappedResponse;
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const resolve = ResponseMap.get(uuid);
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if (!resolve) {
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throw new Error(`Cannot find resolver for ${uuid}`);
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}
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resolve(wrappedResponse);
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});
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return async (uuid, data) => {
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const wrappedRequest: WrappedWorkerRequest = {
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uuid,
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data,
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};
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const result = new Promise<WrappedWorkerResponse>(resolve => {
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ResponseMap.set(uuid, resolve);
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});
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worker.postMessage(wrappedRequest);
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return result;
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};
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}
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