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import log from 'electron-log';
import fs from 'fs';
import { po } from 'gettext-parser';
import Gettext from 'node-gettext';
import path from 'path';
const SOURCE_LANGUAGE = 'en';
let SELECTED_LANGUAGE = SOURCE_LANGUAGE;
const LOCALES_DIR = path.resolve(__dirname, '../../locales');
// `{debug: false}` option prevents Gettext from printing the warnings to console in development
// the errors are handled separately in the "error" handler below
const catalogue = new Gettext({ debug: false });
catalogue.setTextDomain('messages');
catalogue.on('error', (error) => {
// Filter out the "no translation was found" errors for the source language
if (SELECTED_LANGUAGE === SOURCE_LANGUAGE && error.indexOf('No translation was found') !== -1) {
return;
}
log.warn(`Gettext error: ${error}`);
});
export function loadTranslations(currentLocale: string) {
// First look for exact match of the current locale
const preferredLocales = [];
if (currentLocale !== SOURCE_LANGUAGE) {
preferredLocales.push(currentLocale);
}
// In case of region bound locale like en-US, fallback to en.
const language = Gettext.getLanguageCode(currentLocale);
if (currentLocale !== language) {
preferredLocales.push(language);
}
for (const locale of preferredLocales) {
if (parseTranslation(locale, 'messages')) {
log.info(`Loaded translations for ${locale}`);
catalogue.setLocale(locale);
SELECTED_LANGUAGE = locale;
return;
}
}
}
function parseTranslation(locale: string, domain: string): boolean {
const filename = path.join(LOCALES_DIR, locale, `${domain}-${locale}.po`);
let buffer: Buffer;
try {
buffer = fs.readFileSync(filename);
} catch (error) {
if (error.code !== 'ENOENT') {
log.error(`Cannot read the gettext file "${filename}": ${error.message}`);
}
return false;
}
let translations: object;
try {
translations = po.parse(buffer);
} catch (error) {
log.error(`Cannot parse the gettext file "${filename}": ${error.message}`);
return false;
}
catalogue.addTranslations(locale, domain, translations);
return true;
}
export const gettext = (msgid: string): string => {
return catalogue.gettext(msgid);
};
export const pgettext = (msgctx: string, msgid: string): string => {
return catalogue.pgettext(msgctx, msgid);
};
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