worker-factory
Version:
A little factory function to create a JSON-RPC based Web Worker implementation.
36 lines • 1.51 kB
JavaScript
import { generateUniqueNumber } from 'fast-unique-numbers';
import { renderUnknownPortIdError } from './error-renderers';
import { isSupportingTransferables } from './is-supporting-transferables';
const DESTROY_WORKER_FUNCTIONS = new Map();
export const extendWorkerImplementation = (createWorker, partialWorkerImplementation, isSupportedFunction) => ({
...partialWorkerImplementation,
connect: ({ port }) => {
port.start();
const destroyWorker = createWorker(port, partialWorkerImplementation);
const portId = generateUniqueNumber(DESTROY_WORKER_FUNCTIONS);
DESTROY_WORKER_FUNCTIONS.set(portId, () => {
destroyWorker();
port.close();
DESTROY_WORKER_FUNCTIONS.delete(portId);
});
return { result: portId };
},
disconnect: ({ portId }) => {
const destroyWorker = DESTROY_WORKER_FUNCTIONS.get(portId);
if (destroyWorker === undefined) {
throw renderUnknownPortIdError(portId);
}
destroyWorker();
return { result: null };
},
isSupported: async () => {
const isSelfSupported = await isSupportingTransferables();
if (isSelfSupported) {
const result = isSupportedFunction();
const synchronousResult = result instanceof Promise ? await result : result;
return { result: synchronousResult };
}
return { result: false };
}
});
//# sourceMappingURL=extend-worker-implementation.js.map