web-apps/apps/common/locale.js

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/*
*
* (c) Copyright Ascensio System SIA 2010-2019
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*
* This program is a free software product. You can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License (AGPL)
* version 3 as published by the Free Software Foundation. In accordance with
* Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
* that Ascensio System SIA expressly excludes the warranty of non-infringement
* of any third-party rights.
*
* This program is distributed WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
* details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
*
* You can contact Ascensio System SIA at 20A-12 Ernesta Birznieka-Upisha
* street, Riga, Latvia, EU, LV-1050.
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*
* The interactive user interfaces in modified source and object code versions
* of the Program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU AGPL version 3.
*
* Pursuant to Section 7(b) of the License you must retain the original Product
* logo when distributing the program. Pursuant to Section 7(e) we decline to
* grant you any rights under trademark law for use of our trademarks.
*
* All the Product's GUI elements, including illustrations and icon sets, as
* well as technical writing content are licensed under the terms of the
* Creative Commons Attribution-ShareAlike 4.0 International. See the License
* terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
*
*/
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if (Common === undefined) {
var Common = {};
}
Common.Locale = new(function() {
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"use strict";
var l10n = null;
var loadcallback,
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apply = false,
defLang = '{{DEFAULT_LANG}}',
currentLang = defLang,
_4letterLangs = ['pt-pt', 'zh-tw'];
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var _applyLocalization = function(callback) {
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try {
callback && (loadcallback = callback);
if (l10n) {
for (var prop in l10n) {
var p = prop.split('.');
if (p && p.length > 2) {
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var obj = window;
for (var i = 0; i < p.length - 1; ++i) {
if (obj[p[i]] === undefined) {
obj[p[i]] = new Object();
}
obj = obj[p[i]];
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}
if (obj) {
obj[p[p.length - 1]] = l10n[prop];
}
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}
}
loadcallback && loadcallback();
} else
apply = true;
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}
catch (e) {
}
};
var _get = function(prop, scope) {
var res = '';
if (l10n && scope && scope.name) {
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res = l10n[scope.name + '.' + prop];
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if ( !res && scope.default )
res = scope.default;
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}
return res || (scope ? eval(scope.name).prototype[prop] : '');
};
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var _getCurrentLanguage = function() {
return currentLang;
};
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var _getDefaultLanguage = function() {
return defLang;
};
var _getLoadedLanguage = function() {
return loadedLang;
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};
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var _getUrlParameterByName = function(name) {
name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
results = regex.exec(location.search);
return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
};
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var _requireLang = function (l) {
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typeof l != 'string' && (l = null);
var lang = (l || _getUrlParameterByName('lang') || defLang);
var idx4Letters = _4letterLangs.indexOf(lang.replace('_', '-').toLowerCase()); // try to load 4 letters language
lang = (idx4Letters<0) ? lang.split(/[\-_]/)[0] : _4letterLangs[idx4Letters];
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currentLang = lang;
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fetch('locale/' + lang + '.json')
.then(function(response) {
if (!response.ok) {
if (idx4Letters>=0) { // try to load 2-letters language
throw new Error('4letters error');
}
currentLang = defLang;
if (lang != defLang)
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/* load default lang if fetch failed */
return fetch('locale/' + defLang + '.json');
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throw new Error('server error');
}
return response.json();
}).then(function(response) {
if ( response.json ) {
if (!response.ok)
throw new Error('server error');
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return response.json();
} else {
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l10n = response;
/* to break promises chain */
throw new Error('loaded');
}
}).then(function(json) {
l10n = json || {};
apply && _applyLocalization();
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}).catch(function(e) {
if ( /4letters/.test(e) ) {
return setTimeout(function(){
_requireLang(lang.split(/[\-_]/)[0]);
}, 0);
}
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if ( !/loaded/.test(e) && currentLang != defLang && defLang && defLang.length < 3 ) {
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return setTimeout(function(){
_requireLang(defLang)
}, 0);
}
l10n = l10n || {};
apply && _applyLocalization();
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if ( e.message == 'loaded' ) {
} else {
currentLang = null;
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console.log('fetch error: ' + e);
}
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});
};
if ( !window.fetch ) {
/* use fetch polifill if native method isn't supported */
var polyfills = ['../vendor/fetch/fetch.umd'];
if ( !window.Promise ) {
require(['../vendor/es6-promise/es6-promise.auto.min'],
function () {
require(polyfills, _requireLang);
});
} else require(polyfills, _requireLang);
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} else _requireLang();
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const _isCurrentRtl = function () {
return false;
};
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return {
apply: _applyLocalization,
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get: _get,
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getCurrentLanguage: _getCurrentLanguage,
isCurrentLanguageRtl: _isCurrentRtl,
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getDefaultLanguage: _getDefaultLanguage
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};
})();