@vendure/core
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A modern, headless ecommerce framework
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JavaScript
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Object.defineProperty(exports, "__esModule", { value: true });
exports.I18nService = void 0;
const common_1 = require("@nestjs/common");
const fs = __importStar(require("fs"));
const i18next_1 = __importDefault(require("i18next"));
const i18next_fs_backend_1 = __importDefault(require("i18next-fs-backend"));
const i18next_http_middleware_1 = __importDefault(require("i18next-http-middleware"));
const i18next_icu_1 = __importDefault(require("i18next-icu"));
const path_1 = __importDefault(require("path"));
const config_1 = require("../config");
const config_service_1 = require("../config/config.service");
const i18n_error_1 = require("./i18n-error");
/**
* This service is responsible for translating messages from the server before they reach the client.
* The `i18next-express-middleware` middleware detects the client's preferred language based on
* the `Accept-Language` header or "lang" query param and adds language-specific translation
* functions to the Express request / response objects.
*
* @docsCategory common
* @docsPage I18nService
* @docsWeight 0
*/
let I18nService = class I18nService {
/**
* @internal
* @param configService
*/
constructor(configService) {
this.configService = configService;
}
/**
* @internal
*/
onModuleInit() {
return i18next_1.default
.use(i18next_http_middleware_1.default.LanguageDetector)
.use(i18next_fs_backend_1.default)
.use(i18next_icu_1.default)
.init({
nsSeparator: false,
preload: ['en', 'de', 'ru', 'uk', 'fr'],
fallbackLng: 'en',
detection: {
lookupQuerystring: 'languageCode',
},
backend: {
loadPath: path_1.default.join(__dirname, 'messages/{{lng}}.json'),
jsonIndent: 2,
},
});
}
/**
* @internal
*/
handle() {
// Explicit cast due to type mismatch between express v5 (Vendure core)
// and express v4 (several transitive dependencies)
return i18next_http_middleware_1.default.handle(i18next_1.default);
}
/**
* @description
* Add a I18n translation by json file
*
* @param langKey language key of the I18n translation file
* @param filePath path to the I18n translation file
*/
addTranslationFile(langKey, filePath) {
try {
const rawData = fs.readFileSync(filePath);
const resources = JSON.parse(rawData.toString('utf-8'));
this.addTranslation(langKey, resources);
}
catch (err) {
config_1.Logger.error(`Could not load resources file ${filePath}`, 'I18nService');
}
}
/**
* @description
* Add a I18n translation (key-value) resource
*
* @param langKey language key of the I18n translation file
* @param resources key-value translations
*/
addTranslation(langKey, resources) {
i18next_1.default.addResourceBundle(langKey, 'translation', resources, true, true);
}
/**
* Translates the originalError if it is an instance of I18nError.
* @internal
*/
translateError(req, error) {
const originalError = error.originalError;
const t = req.t;
if (t && originalError instanceof i18n_error_1.I18nError) {
let translation = originalError.message;
try {
translation = t(originalError.message, originalError.variables);
}
catch (e) {
const message = typeof e.message === 'string' ? e.message : JSON.stringify(e.message);
translation += ` (Translation format error: ${message})`;
}
error.message = translation;
// We can now safely remove the variables object so that they do not appear in
// the error returned by the GraphQL API
delete originalError.variables;
}
return error;
}
/**
* Translates the message of an ErrorResult
* @internal
*/
translateErrorResult(req, error) {
const t = req.t;
let translation = error.message;
const key = `errorResult.${error.message}`;
try {
translation = t(key, error);
}
catch (e) {
const message = typeof e.message === 'string' ? e.message : JSON.stringify(e.message);
translation += ` (Translation format error: ${message})`;
}
error.message = translation;
}
};
exports.I18nService = I18nService;
exports.I18nService = I18nService = __decorate([
(0, common_1.Injectable)(),
__metadata("design:paramtypes", [config_service_1.ConfigService])
], I18nService);
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