45 lines
1.6 KiB
TypeScript
45 lines
1.6 KiB
TypeScript
import i18next from 'i18next';
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import { IConfig } from '../base/config/configType';
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import JITSI_TO_BCP47_MAP from './jitsi-bcp47-map.json';
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import logger from './logger';
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import TRANSCRIBER_LANGS from './transcriber-langs.json';
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const DEFAULT_TRANSCRIBER_LANG = 'en-US';
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/**
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* Determine which language to use for transcribing.
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*
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* @param {*} config - Application config.
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* @returns {string}
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*/
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export function determineTranscriptionLanguage(config: IConfig) {
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const { transcription } = config;
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// if transcriptions are not enabled nothing to determine
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if (!transcription?.enabled) {
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return undefined;
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}
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// Depending on the config either use the language that the app automatically detected or the hardcoded
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// config BCP47 value.
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// Jitsi language detections uses custom language tags, but the transcriber expects BCP-47 compliant tags,
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// we use a mapping file to convert them.
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const bcp47Locale = transcription?.useAppLanguage ?? true
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? JITSI_TO_BCP47_MAP[i18next.language as keyof typeof JITSI_TO_BCP47_MAP]
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: transcription?.preferredLanguage;
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// Check if the obtained language is supported by the transcriber
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let safeBCP47Locale = TRANSCRIBER_LANGS[bcp47Locale as keyof typeof TRANSCRIBER_LANGS] && bcp47Locale;
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if (!safeBCP47Locale) {
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safeBCP47Locale = DEFAULT_TRANSCRIBER_LANG;
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logger.warn(`Transcriber language ${bcp47Locale} is not supported, using default ${DEFAULT_TRANSCRIBER_LANG}`);
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}
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logger.info(`Transcriber language set to ${safeBCP47Locale}`);
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return safeBCP47Locale;
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}
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