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import express from "express";
import hbs, { ExpressHandlebars } from "express-handlebars";
import Handlebars from 'handlebars';
import cookieParser from "cookie-parser";
import i18next from "i18next";
import Backend from "i18next-fs-backend";
import { LanguageDetector, handle } from 'i18next-http-middleware';
import { createRequire } from 'module';
import { fileURLToPath } from 'url';
import { dirname } from 'path';
import path from 'path';
const require = createRequire(import.meta.url);
const handlebarsI18next = require('handlebars-i18next');
// Recreate __dirname in ES module
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
import routes from "./routes.js";
import frontend from "./routes/frontend.js";
import activitypub from "./routes/activitypub.js";
import event from "./routes/event.js";
import group from "./routes/group.js";
import staticPages from "./routes/static.js";
import magicLink from "./routes/magicLink.js";
import { initEmailService } from "./lib/email.js";
import { getI18nHelpers } from "./helpers.js";
import {
activityPubContentType,
alternateActivityPubContentType,
} from "./lib/activitypub.js";
import moment from "moment";
const app = express();
app.locals.sendEmails = initEmailService();
// function to construct __dirname with ES module
const getLocalesPath = () => {
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
return path.join(__dirname, '..', 'locales');
};
async function initializeApp() {
// Cookies //
app.use(cookieParser());
// i18next configuration
await i18next
.use(Backend)
.use(LanguageDetector)
.init({
backend: {
loadPath: path.join(getLocalesPath(), '{{lng}}.json'),
},
fallbackLng: 'en',
preload: ['en-US', 'ja'],
supportedLngs: ['en','en-US', 'ja'],
nonExplicitSupportedLngs: true,
load: 'languageOnly',
debug: false,
detection: {
order: ['header', 'cookie'],
lookupHeader: 'accept-language',
lookupCookie: 'i18next',
caches: ['cookie']
},
interpolation: {
escapeValue: false
}
});
app.use(handle(i18next));
// to Switch language
app.use((req, res, next) => {
const currentLanguage = i18next.language;
i18next.changeLanguage(req.language);
const newLanguage = i18next.language;
// Uncomment for debugging
// console.log('Language Change:', {
// header: req.headers['accept-language'],
// detected: req.language,
// currentLanguage: currentLanguage,
// newLanguage: newLanguage
// });
next();
});
// Uncomment for debugging
// app.use((req, res, next) => {
// console.log('Language Detection:', {
// header: req.headers['accept-language'],
// detected: req.language,
// i18next: i18next.language
// });
// next();
// });
// View engine //
const hbsInstance: ExpressHandlebars = hbs.create({
defaultLayout: "main",
partialsDir: ["views/partials/"],
layoutsDir: "views/layouts/",
helpers: {
json: function (context: any) {
return JSON.stringify(context);
},
// add i18next helpers
...getI18nHelpers(),
plural: function (key: string, count: number, options: any) { // Register the plural helper
const translation = i18next.t(key, { count: count });
return translation;
}
},
});
// calling i18nextHelper
if (typeof handlebarsI18next === 'function') {
handlebarsI18next(hbsInstance.handlebars, i18next);
} else if (typeof handlebarsI18next.default === 'function') {
handlebarsI18next.default(hbsInstance.handlebars, i18next);
} else {
console.error('handlebars-i18next helper is not properly loaded');
}
i18next.on('languageChanged', function(lng) {
moment.locale(lng);
});
app.engine("handlebars", hbsInstance.engine);
app.set("view engine", "handlebars");
app.set("hbsInstance", hbsInstance);
// Static files //
app.use(express.static("public"));
// Body parser //
app.use(express.json({ type: alternateActivityPubContentType }));
app.use(express.json({ type: activityPubContentType }));
app.use(express.json({ type: "application/json" }));
app.use(express.urlencoded({ extended: true }));
// Router //
app.use("/", staticPages);
app.use("/", frontend);
app.use("/", activitypub);
app.use("/", event);
app.use("/", group);
app.use("/", magicLink);
app.use("/", routes);
}
initializeApp().catch(console.error);
export default app;
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