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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 | /**
* Internationalization (i18n) Configuration
* Database-driven translation system
*
* @module config/i18n
*/
const { pool } = require('./database');
const { logger } = require('./logger');
/**
* Translation cache
* Reduces database queries for frequently used translations
*/
const translationCache = new Map();
const CACHE_TTL = 3600000; // 1 hour
/**
* Get translation from database
*
* @param {string} languageCode - Language code (e.g., 'en', 'pt')
* @param {string} key - Translation key
* @param {string} defaultValue - Default value if translation not found
* @returns {Promise<string>} Translated string
*/
async function getTranslation(languageCode, key, defaultValue = key) {
try {
// Check cache first
const cacheKey = `${languageCode}:${key}`;
const cached = translationCache.get(cacheKey);
if (cached && Date.now() - cached.timestamp < CACHE_TTL) {
return cached.value;
}
// Query database
const [rows] = await pool.execute(
'SELECT translation_value FROM translations WHERE language_code = ? AND translation_key = ?',
[languageCode, key]
);
if (rows.length > 0) {
const value = rows[0].translation_value;
// Cache the result
translationCache.set(cacheKey, {
value,
timestamp: Date.now()
});
return value;
}
// Fallback to English if not found
if (languageCode !== 'en') {
return getTranslation('en', key, defaultValue);
}
return defaultValue;
} catch (error) {
logger.error('Translation error', { error: error.message, languageCode, key });
return defaultValue;
}
}
/**
* Get multiple translations at once
*
* @param {string} languageCode - Language code
* @param {Array<string>} keys - Array of translation keys
* @returns {Promise<Object>} Object with key-value pairs
*/
async function getTranslations(languageCode, keys) {
try {
const placeholders = keys.map(() => '?').join(',');
const [rows] = await pool.execute(
`SELECT translation_key, translation_value
FROM translations
WHERE language_code = ? AND translation_key IN (${placeholders})`,
[languageCode, ...keys]
);
const translations = {};
rows.forEach(row => {
translations[row.translation_key] = row.translation_value;
});
// Fill missing with keys
keys.forEach(key => {
if (!translations[key]) {
translations[key] = key;
}
});
return translations;
} catch (error) {
logger.error('Translations error', { error: error.message });
return keys.reduce((acc, key) => ({ ...acc, [key]: key }), {});
}
}
/**
* Get all translations for a language
*
* @param {string} languageCode - Language code
* @returns {Promise<Object>} All translations
*/
async function getAllTranslations(languageCode) {
try {
const [rows] = await pool.execute(
'SELECT translation_key, translation_value FROM translations WHERE language_code = ?',
[languageCode]
);
return rows.reduce((acc, row) => ({
...acc,
[row.translation_key]: row.translation_value
}), {});
} catch (error) {
logger.error('Get all translations error', { error: error.message });
return {};
}
}
/**
* Clear translation cache
*/
function clearCache() {
translationCache.clear();
logger.info('Translation cache cleared');
}
/**
* i18n Middleware
* Attaches translation function to request object
*/
function i18nMiddleware(req, res, next) {
// Get language from header, query, or default to 'en'
const language = req.headers['accept-language']?.split(',')[0]?.split('-')[0] ||
req.query.lang ||
req.user?.language ||
'en';
// Attach translation function to request
req.t = async (key, defaultValue) => {
return getTranslation(language, key, defaultValue);
};
// Attach language to request
req.language = language;
next();
}
/**
* Initialize default translations
*/
async function initializeDefaultTranslations() {
try {
const defaultTranslations = {
en: {
// Authentication
'auth.login': 'Login',
'auth.logout': 'Logout',
'auth.email': 'Email',
'auth.password': 'Password',
'auth.username': 'Username',
'auth.invalid_credentials': 'Invalid credentials',
'auth.login_success': 'Login successful',
'auth.logout_success': 'Logout successful',
// Common
'common.save': 'Save',
'common.cancel': 'Cancel',
'common.delete': 'Delete',
'common.edit': 'Edit',
'common.create': 'Create',
'common.update': 'Update',
'common.search': 'Search',
'common.filter': 'Filter',
'common.export': 'Export',
'common.import': 'Import',
'common.yes': 'Yes',
'common.no': 'No',
'common.loading': 'Loading...',
'common.success': 'Success',
'common.error': 'Error',
'common.warning': 'Warning',
'common.info': 'Information',
// Validation
'validation.required': 'This field is required',
'validation.email': 'Invalid email address',
'validation.min_length': 'Minimum length is {min} characters',
'validation.max_length': 'Maximum length is {max} characters',
'validation.password_mismatch': 'Passwords do not match',
// Dashboard
'dashboard.title': 'Dashboard',
'dashboard.welcome': 'Welcome',
'dashboard.statistics': 'Statistics',
// Tenants
'tenants.title': 'Tenants',
'tenants.create': 'Create Tenant',
'tenants.edit': 'Edit Tenant',
'tenants.delete': 'Delete Tenant',
'tenants.name': 'Name',
'tenants.email': 'Email',
'tenants.status': 'Status',
'tenants.plan': 'Plan',
// Plans
'plans.title': 'Subscription Plans',
'plans.create': 'Create Plan',
'plans.name': 'Plan Name',
'plans.price': 'Price',
'plans.features': 'Features',
// Messages
'messages.title': 'Messages',
'messages.send': 'Send Message',
'messages.received': 'Received',
'messages.sent': 'Sent',
},
pt: {
// Authentication
'auth.login': 'Entrar',
'auth.logout': 'Sair',
'auth.email': 'E-mail',
'auth.password': 'Senha',
'auth.username': 'Usuário',
'auth.invalid_credentials': 'Credenciais inválidas',
'auth.login_success': 'Login realizado com sucesso',
'auth.logout_success': 'Logout realizado com sucesso',
// Common
'common.save': 'Salvar',
'common.cancel': 'Cancelar',
'common.delete': 'Excluir',
'common.edit': 'Editar',
'common.create': 'Criar',
'common.update': 'Atualizar',
'common.search': 'Pesquisar',
'common.filter': 'Filtrar',
'common.export': 'Exportar',
'common.import': 'Importar',
'common.yes': 'Sim',
'common.no': 'Não',
'common.loading': 'Carregando...',
'common.success': 'Sucesso',
'common.error': 'Erro',
'common.warning': 'Aviso',
'common.info': 'Informação',
// Validation
'validation.required': 'Este campo é obrigatório',
'validation.email': 'Endereço de e-mail inválido',
'validation.min_length': 'Comprimento mínimo é {min} caracteres',
'validation.max_length': 'Comprimento máximo é {max} caracteres',
'validation.password_mismatch': 'As senhas não coincidem',
// Dashboard
'dashboard.title': 'Painel',
'dashboard.welcome': 'Bem-vindo',
'dashboard.statistics': 'Estatísticas',
// Tenants
'tenants.title': 'Inquilinos',
'tenants.create': 'Criar Inquilino',
'tenants.edit': 'Editar Inquilino',
'tenants.delete': 'Excluir Inquilino',
'tenants.name': 'Nome',
'tenants.email': 'E-mail',
'tenants.status': 'Status',
'tenants.plan': 'Plano',
// Plans
'plans.title': 'Planos de Assinatura',
'plans.create': 'Criar Plano',
'plans.name': 'Nome do Plano',
'plans.price': 'Preço',
'plans.features': 'Recursos',
// Messages
'messages.title': 'Mensagens',
'messages.send': 'Enviar Mensagem',
'messages.received': 'Recebidas',
'messages.sent': 'Enviadas',
}
};
for (const [langCode, translations] of Object.entries(defaultTranslations)) {
const langName = langCode === 'en' ? 'English' : 'Português';
for (const [key, value] of Object.entries(translations)) {
await pool.execute(
`INSERT IGNORE INTO translations (language_code, language_name, translation_key, translation_value, category)
VALUES (?, ?, ?, ?, ?)`,
[langCode, langName, key, value, key.split('.')[0]]
);
}
}
logger.info('Default translations initialized');
} catch (error) {
logger.error('Error initializing translations', { error: error.message });
}
}
module.exports = {
getTranslation,
getTranslations,
getAllTranslations,
clearCache,
i18nMiddleware,
initializeDefaultTranslations
};
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