43 lines
1.3 KiB
TypeScript
43 lines
1.3 KiB
TypeScript
import type { FastTextApi } from '../lib/fasttextweb/fasttext.worker';
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import type { Connector } from './PostMessageConnector';
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import { IS_TRANSLATION_SUPPORTED } from './browser/windowEnvironment';
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import Deferred from './Deferred';
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import { createConnector } from './PostMessageConnector';
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const WORKER_INIT_DELAY = 4000;
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const DEFAULT_THRESHOLD = 0.2;
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const DEFAULT_LABELS_COUNT = 5;
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let worker: Connector<FastTextApi> | undefined;
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const initializationDeferred = new Deferred();
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if (IS_TRANSLATION_SUPPORTED) {
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setTimeout(initWorker, WORKER_INIT_DELAY);
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}
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function initWorker() {
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if (!worker) {
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worker = createConnector<FastTextApi>(
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new Worker(new URL('../lib/fasttextweb/fasttext.worker.ts', import.meta.url)),
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);
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initializationDeferred.resolve();
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}
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}
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export async function detectLanguage(text: string, threshold = DEFAULT_THRESHOLD) {
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if (!worker) await initializationDeferred.promise;
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const result = await worker!.request({ name: 'detectLanguage', args: [text, threshold] });
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return result;
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}
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export async function detectLanguageProbability(
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text: string, labelsCount = DEFAULT_LABELS_COUNT, threshold = DEFAULT_THRESHOLD,
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) {
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if (!worker) await initializationDeferred.promise;
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const result = await worker!.request({ name: 'detectLanguageProbability', args: [text, labelsCount, threshold] });
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return result;
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}
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