81e4730037
- SUPPORTED_SUB_LANGUAGE_CODES[] that I introduced was pretty redundant when SUPPORTED_LANGUAGES[] already hold the information. The logic to ignore sub-languages (i.e. reduce the locale's "en-GB" to "en" is now located in getDefaultLanguage()). - SUPPORTED_BROWSER_LANGUAGES[] and SUPPORTED_LANGUAGES[] look so similar and hard to tell what the former is for at first glance. The functionality to map 'zh-CN' to 'zh-Hans' is now handled by resolveLanguageAlias(), which makes the intention clearer. This leaves us with a single list -- SUPPORTED_LANGUAGES[], whose key also tells us the desired language code to use. Also, clients now need to call `resolveLanguageAlias` to map any language code aliases, as they differ depending on how it is queried (e.g. `navigator.language` vs. `app.getLocal()` uses different standards). I think we no longer need to explicitly migrate existing user's 'zh-CN' into 'zh-Hans' because the rest of the system will always use the desired language code as long as 'resolveLanguageAlias' is called appropriately. e.g. the system uses `selectLanguage` and `selectLanguage` calls `resolveLanguageAlias`.
53 lines
1.7 KiB
JavaScript
53 lines
1.7 KiB
JavaScript
import homepages from 'homepages';
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import SUPPORTED_LANGUAGES from 'constants/supported_languages';
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const DEFAULT_LANG = 'en';
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/**
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* Checks if the given language is an alias of a language that we support, and
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* returns the version that the rest of the application (lbry-sdk, Transifex)
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* expects. If the given language is not an expected alias, the original value
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* is returned.
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*
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* @param lang
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* @returns {*}
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*/
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export function resolveLanguageAlias(lang) {
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const KNOWN_LANG_ALIASES = {
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'zh-CN': 'zh-Hans',
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'zh-TW': 'zh-Hant',
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};
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return KNOWN_LANG_ALIASES[lang] ? KNOWN_LANG_ALIASES[lang] : lang;
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}
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/**
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* Returns the native language of the system, filtered/resolved
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* to the language code format that the application expects.
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*
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* @returns {string|*}
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*/
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export const getDefaultLanguage = () => {
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const browserLanguage = resolveLanguageAlias(window.navigator.language);
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if (SUPPORTED_LANGUAGES[browserLanguage]) {
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return browserLanguage;
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} else {
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if (browserLanguage.includes('-')) {
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// Perhaps it is a sub-lang that we are currently not supporting.
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// See if we support the main one.
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const mainLang = browserLanguage.substring(0, browserLanguage.indexOf('-'));
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if (SUPPORTED_LANGUAGES[mainLang]) {
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return mainLang;
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} else {
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return DEFAULT_LANG;
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}
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} else {
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return DEFAULT_LANG;
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}
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}
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};
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// If homepages has a key "zh-Hant" return that, otherwise return "zh", otherwise "en"
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export const getDefaultHomepageKey = () => {
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const language = getDefaultLanguage();
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return (homepages[language] && language) || (homepages[language.slice(0, 2)] && language.slice(0, 2)) || DEFAULT_LANG;
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};
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