71 lines
2.3 KiB
TypeScript
71 lines
2.3 KiB
TypeScript
///
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/// Copyright © 2016-2024 The Thingsboard Authors
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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import { environment as env } from '@env/environment';
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import { TranslateService } from '@ngx-translate/core';
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import _moment from 'moment';
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import { Observable } from 'rxjs';
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export function updateUserLang(translate: TranslateService, document: Document, userLang: string, translations = env.supportedLangs): Observable<any> {
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let targetLang = userLang;
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if (!translations) {
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translations = env.supportedLangs;
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}
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if (!env.production) {
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console.log(`User lang: ${targetLang}`);
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}
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if (!targetLang) {
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targetLang = translate.getBrowserCultureLang();
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if (!env.production) {
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console.log(`Fallback to browser lang: ${targetLang}`);
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}
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}
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const detectedSupportedLang = detectSupportedLang(targetLang, translations);
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if (!env.production) {
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console.log(`Detected supported lang: ${detectedSupportedLang}`);
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}
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document.documentElement.lang = detectedSupportedLang.replace('_', '-');
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_moment.locale([detectedSupportedLang]);
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return translate.use(detectedSupportedLang);
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}
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function detectSupportedLang(targetLang: string, translations: string[]): string {
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const langTag = (targetLang || '').split('-').join('_');
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if (langTag.length) {
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if (translations.indexOf(langTag) > -1) {
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return langTag;
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} else {
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const parts = langTag.split('_');
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let lang;
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if (parts.length === 2) {
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lang = parts[0];
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} else {
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lang = langTag;
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}
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const foundLangs = translations.filter(
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(supportedLang: string) => {
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const supportedLangParts = supportedLang.split('_');
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return supportedLangParts[0] === lang;
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}
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);
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if (foundLangs.length) {
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return foundLangs[0];
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}
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}
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}
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return env.defaultLang;
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}
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