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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
let msgId = 1;
/**
* @memberof utils/utils
* @static
*/
function workerTask(worker, method) {
return function (...args) {
return new Promise((resolve, reject) => {
const id = msgId++;
worker.postMessage({ id, method, args });
const listener = ({ data: result }) => {
if (result.id !== id) {
return;
}
worker.removeEventListener("message", listener);
if (result.error) {
reject(result.error);
} else {
resolve(result.response);
}
};
worker.addEventListener("message", listener);
});
};
}
function workerHandler(publicInterface) {
return function onTask(msg) {
const { id, method, args } = msg.data;
const response = publicInterface[method].apply(null, args);
if (response instanceof Promise) {
response
.then(val => self.postMessage({ id, response: val }))
.catch(error => self.postMessage({ id, error }));
} else {
self.postMessage({ id, response });
}
};
}
export { workerTask, workerHandler };
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