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| 1 | +const rtlLang = [ |
| 2 | + 'ar', // Arabic |
| 3 | + 'fa', // Persian |
| 4 | + 'he', // Hebrew |
| 5 | + 'ur', // Urdu |
| 6 | + 'ps', // Pashto |
| 7 | + 'sd', // Sindhi |
| 8 | + 'ku', // Kurdish |
| 9 | + 'yi', // Yiddish |
| 10 | + 'dv', // Dhivehi |
| 11 | +]; |
| 12 | + |
| 13 | +let translations = {}; |
| 14 | +let baseTranslations = {}; |
| 15 | +let availableLanguages = ['en']; |
| 16 | +let languageNames = {}; |
| 17 | + |
| 18 | +/** |
| 19 | + * Get a formatted string based on the language key and optional arguments |
| 20 | + * Supported formats: %s, %d, %f, %x, %1$s, %2$d, etc. |
| 21 | + * @param {string} id - The translation key |
| 22 | + * @param {...any} args - Arguments to format into the string |
| 23 | + * @returns {string} - The formatted translation |
| 24 | + */ |
| 25 | +export function getString(id, ...args) { |
| 26 | + let translation = translations[id] || (baseTranslations && baseTranslations[id]) || id; |
| 27 | + if (args.length === 0) return translation; |
| 28 | + |
| 29 | + let argIndex = 0; |
| 30 | + return translation.replace(/%(?:(\d+)\$)?([%sdfx])/g, (match, index, type) => { |
| 31 | + if (type === '%') return '%'; |
| 32 | + if (index) { |
| 33 | + const i = parseInt(index) - 1; |
| 34 | + return args[i] !== undefined ? args[i] : match; |
| 35 | + } else { |
| 36 | + return args[argIndex++] !== undefined ? args[argIndex - 1] : match; |
| 37 | + } |
| 38 | + }); |
| 39 | +} |
| 40 | + |
| 41 | +/** |
| 42 | + * Parse XML translation file into a JavaScript object |
| 43 | + * @param {string} xmlText - The XML content as string |
| 44 | + * @returns {Object} - Parsed translations |
| 45 | + */ |
| 46 | +function parseTranslationsXML(xmlText) { |
| 47 | + const parser = new DOMParser(); |
| 48 | + const xmlDoc = parser.parseFromString(xmlText, 'text/xml'); |
| 49 | + const strings = xmlDoc.getElementsByTagName('string'); |
| 50 | + const translations = {}; |
| 51 | + |
| 52 | + for (let i = 0; i < strings.length; i++) { |
| 53 | + const string = strings[i]; |
| 54 | + const name = string.getAttribute('name'); |
| 55 | + const value = string.textContent.replace(/\\n/g, '\n'); |
| 56 | + translations[name] = value; |
| 57 | + } |
| 58 | + |
| 59 | + return translations; |
| 60 | +} |
| 61 | + |
| 62 | +/** |
| 63 | + * Detect user's default language |
| 64 | + * @returns {Promise<string>} - Detected language code |
| 65 | + */ |
| 66 | +async function detectUserLanguage() { |
| 67 | + const userLang = navigator.language || navigator.userLanguage; |
| 68 | + const langCode = userLang.split('-')[0]; |
| 69 | + |
| 70 | + try { |
| 71 | + // Fetch available languages |
| 72 | + const availableResponse = await fetch('locales/languages.json'); |
| 73 | + const availableData = await availableResponse.json(); |
| 74 | + availableLanguages = Object.keys(availableData); |
| 75 | + languageNames = availableData; |
| 76 | + |
| 77 | + // Fetch preferred language |
| 78 | + const prefered_language_code = localStorage.getItem('kp-next_language'); |
| 79 | + |
| 80 | + // Check if preferred language is valid |
| 81 | + if (prefered_language_code !== 'default' && availableLanguages.includes(prefered_language_code)) { |
| 82 | + return prefered_language_code; |
| 83 | + } else if (availableLanguages.includes(userLang)) { |
| 84 | + return userLang; |
| 85 | + } else if (availableLanguages.includes(langCode)) { |
| 86 | + return langCode; |
| 87 | + } else { |
| 88 | + localStorage.removeItem('kp-next_language'); |
| 89 | + return 'en'; |
| 90 | + } |
| 91 | + } catch (error) { |
| 92 | + console.error('Error detecting user language:', error); |
| 93 | + return 'en'; |
| 94 | + } |
| 95 | +} |
| 96 | + |
| 97 | +/** |
| 98 | + * Load translations dynamically based on the selected language |
| 99 | + * @returns {Promise<void>} |
| 100 | + */ |
| 101 | +export async function loadTranslations() { |
| 102 | + try { |
| 103 | + // load Englsih as base translations |
| 104 | + const baseResponse = await fetch('./locales/strings/en.xml'); |
| 105 | + const baseXML = await baseResponse.text(); |
| 106 | + baseTranslations = parseTranslationsXML(baseXML); |
| 107 | + |
| 108 | + // load user's language if available |
| 109 | + const lang = await detectUserLanguage(); |
| 110 | + if (lang !== 'en') { |
| 111 | + const response = await fetch(`locales/strings/${lang}.xml`); |
| 112 | + const userXML = await response.text(); |
| 113 | + const userTranslations = parseTranslationsXML(userXML); |
| 114 | + translations = { ...baseTranslations, ...userTranslations }; |
| 115 | + } else { |
| 116 | + translations = baseTranslations; |
| 117 | + } |
| 118 | + |
| 119 | + // Support for rtl language |
| 120 | + const isRTL = rtlLang.includes(lang.split('-')[0]); |
| 121 | + const dir = isRTL ? 'rtl' : 'ltr'; |
| 122 | + document.documentElement.setAttribute('dir', dir); |
| 123 | + document.querySelectorAll('[flip-icon-in-rtl="true"]').forEach(el => { |
| 124 | + el.style.transform = dir === 'rtl' ? 'scaleX(-1)' : 'scaleX(1)'; |
| 125 | + }); |
| 126 | + |
| 127 | + // Generate language menu |
| 128 | + await generateLanguageMenu(); |
| 129 | + } catch (error) { |
| 130 | + console.error('Error loading translations:', error); |
| 131 | + translations = baseTranslations; |
| 132 | + } |
| 133 | + applyTranslations(); |
| 134 | +} |
| 135 | + |
| 136 | +/** |
| 137 | + * Apply translations to all elements with data-i18n attributes |
| 138 | + * @returns {void} |
| 139 | + */ |
| 140 | +function applyTranslations() { |
| 141 | + document.querySelectorAll("[data-i18n]").forEach((el) => { |
| 142 | + const key = el.getAttribute("data-i18n"); |
| 143 | + const translation = getString(key); |
| 144 | + if (translation !== key) { |
| 145 | + if (el.hasAttribute("placeholder")) { |
| 146 | + el.setAttribute("placeholder", translation); |
| 147 | + } else if (el.hasAttribute("label")) { |
| 148 | + el.setAttribute("label", translation); |
| 149 | + } else { |
| 150 | + el.textContent = translation; |
| 151 | + } |
| 152 | + } |
| 153 | + }); |
| 154 | +} |
| 155 | + |
| 156 | +/** |
| 157 | + * Function to set a language |
| 158 | + * @param {string} language - Target langauge to set |
| 159 | + * @returns {void} |
| 160 | + */ |
| 161 | +function setLanguage(language) { |
| 162 | + localStorage.setItem('kp-next_language', language); |
| 163 | + window.location.reload(); |
| 164 | +} |
| 165 | + |
| 166 | +/** |
| 167 | + * Generate the language menu dynamically |
| 168 | + * Refer available-lang.json in ./locales for list of languages |
| 169 | + * @returns {Promise<void>} |
| 170 | + */ |
| 171 | +async function generateLanguageMenu() { |
| 172 | + const languageForm = document.getElementById('language-form'); |
| 173 | + languageForm.innerHTML = ''; |
| 174 | + |
| 175 | + const createOption = (lang, name) => { |
| 176 | + const label = document.createElement('label'); |
| 177 | + label.className = 'language-option'; |
| 178 | + label.innerHTML = ` |
| 179 | + <md-radio name="language" value="${lang}"></md-radio> |
| 180 | + <span>${name}</span> |
| 181 | + `; |
| 182 | + |
| 183 | + const radio = label.querySelector('md-radio'); |
| 184 | + |
| 185 | + const currentLang = localStorage.getItem('kp-next_language') || 'default'; |
| 186 | + if (currentLang === lang) radio.checked = true; |
| 187 | + |
| 188 | + radio.addEventListener('change', () => { |
| 189 | + if (radio.checked) setLanguage(lang); |
| 190 | + }); |
| 191 | + |
| 192 | + languageForm.appendChild(label); |
| 193 | + }; |
| 194 | + |
| 195 | + createOption('default', getString('label_system_default')); |
| 196 | + |
| 197 | + const sortedLanguages = Object.entries(languageNames) |
| 198 | + .map(([lang, name]) => ({ lang, name })) |
| 199 | + .sort((a, b) => a.name.localeCompare(b.name)); |
| 200 | + |
| 201 | + sortedLanguages.forEach(({ lang, name }) => { |
| 202 | + createOption(lang, name); |
| 203 | + }); |
| 204 | + |
| 205 | + applyTranslations(); |
| 206 | +} |
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