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176 lines
4.2 KiB
176 lines
4.2 KiB
const osLocale = require("os-locale") |
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const fs = require("fs") |
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const path = require("path") |
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let cache = { defaultLocale: "en", availableLocales: [], canonicalLocales: [], locales: [] } |
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let i18n = {} |
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i18n.__ = function (name) { |
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i18n.getLocale() |
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let string = i18n.getLocaleData(cache.locale)[name] || i18n.getLocaleData(cache.defaultLocale)[name] |
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if (!string) { |
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let underscoreIndex = cache.locale.indexOf("-") |
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if (underscoreIndex !== -1) { |
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let localeBaseCode = cache.locale.substring(0, underscoreIndex) |
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if (i18n.localeExists(localeBaseCode)) { |
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string = i18n.getLocaleData(localeBaseCode)[name] |
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} |
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} |
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} |
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if (string) { |
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if (arguments.length === 1) { |
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return string |
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} else { |
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for (let i = 0, l = arguments.length - 1; i < l; i++) { |
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string = string.replace("$" + i, arguments[1 + i]) |
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} |
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return string |
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} |
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} else { |
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console.warn(`String "${name}" does not exist.`) |
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} |
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} |
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i18n.localeExists = function (locale) { |
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return i18n.getAvailableLocales().indexOf(locale) !== -1 |
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} |
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i18n.getLocaleData = function (locale) { |
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if (!cache.locales[locale]) { |
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cache.locales[locale] = i18n.readLocaleFile(locale) |
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} |
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return cache.locales[locale] |
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} |
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i18n.readLocaleFile = function (locale) { |
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let localeData = JSON.parse(fs.readFileSync( |
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path.join(__dirname, "..", "locales", locale + ".json"), |
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{ encoding: "utf8" } |
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)) |
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if (localeData.__redirect__) { |
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let redirectedLocaleData = JSON.parse(fs.readFileSync( |
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path.join(__dirname, "..", "locales", localeData.__redirect__ + ".json"), |
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{ encoding: "utf8" } |
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)) |
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redirectedLocaleData.__is_redirected__ = true |
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redirectedLocaleData.__canonical__ = localeData.__redirect__ |
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return redirectedLocaleData |
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} else { |
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return localeData |
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} |
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} |
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i18n.doDOMReplacement = function () { |
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let elems0 = document.getElementsByClassName("i18n") |
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for (let i = 0, l = elems0.length; i < l; i++) { |
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elems0[i].innerHTML = i18n.__(elems0[i].dataset.i18nName) |
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} |
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let elems1 = document.getElementsByClassName("i18n-attr") |
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for (let i = 0, l = elems1.length; i < l; i++) { |
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let mappings = elems1[i].dataset.i18nMap.split(";") |
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for (let j = 0, m = mappings.length; j < m; j++) { |
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let keyVal = mappings[j].split(":") |
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elems1[i].setAttribute(keyVal[0], i18n.__(keyVal[1])) |
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} |
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} |
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} |
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i18n.setLocale = function (locale) { |
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if (i18n.localeExists(locale)) { |
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cache.locale = locale |
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return true |
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} |
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return false |
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} |
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i18n.getLocale = function () { |
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if (!cache.locale) { |
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let systemLocale = osLocale.sync() |
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let availableLocales = i18n.getAvailableLocales() |
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if (availableLocales.indexOf(systemLocale) !== -1) { |
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cache.locale = systemLocale |
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} else if (availableLocales.indexOf(systemLocale.split("-")[0]) !== -1) { |
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cache.locale = systemLocale.split("-")[0] |
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} else { |
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var looseLocaleMatch |
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for (let i = 0, l = availableLocales.length; i < l; i++) { |
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if (availableLocales[i].split("-")[0] === systemLocale.split("-")[0]) { |
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looseLocaleMatch = availableLocales[i] |
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break |
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} |
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} |
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if (looseLocaleMatch) { |
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cache.locale = looseLocaleMatch |
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} else { |
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cache.locale = cache.defaultLocale |
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} |
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} |
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} |
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return cache.locale |
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} |
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i18n.getCanonicalLocale = function () { |
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i18n.getLocale() |
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if (!cache.locales[cache.locale]) { |
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cache.locales[cache.locale] = i18n.readLocaleFile(cache.locale) |
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} |
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if (cache.locales[cache.locale].__canonical__) { |
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return cache.locales[cache.locale].__canonical__ |
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} else { |
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return cache.locale |
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} |
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} |
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i18n.getAvailableLocales = function (canonicalOnly) { |
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if (!cache.availableLocales.length) { |
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let filenames = fs.readdirSync(path.join(__dirname, "..", "locales")) |
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for (let i = 0, l = filenames.length; i < l; i++) { |
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cache.availableLocales.push(filenames[i].split(".")[0]) |
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} |
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} |
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if (canonicalOnly) { |
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return i18n.getCanonicalLocales() |
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} else { |
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return cache.availableLocales |
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} |
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} |
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i18n.getCanonicalLocales = function () { |
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i18n.getAvailableLocales(); |
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if (!cache.canonicalLocales.length) { |
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for (let i = 0, l = cache.availableLocales.length; i < l; i++) { |
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if (!i18n.readLocaleFile(cache.availableLocales[i]).hasOwnProperty("__is_redirected__")) { |
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cache.canonicalLocales.push(cache.availableLocales[i]) |
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} |
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} |
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} |
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return cache.canonicalLocales |
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} |
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i18n.getDefaultLocale = function () { |
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return cache.defaultLocale |
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} |
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module.exports = i18n |