new try with readonly i18n

app.ts

@@ -15,6 +15,19 @@ import nodemailer from "nodemailer";
 const bodyParser = require("body-parser");
 import jwt from "jsonwebtoken";
 var QRCode = require("qrcode");
+const { I18n } = require("i18n");
+const path = require("path");
+
+// we must ensure that no write access to the file system is needed; as we are running on a readonly serverless platform
+const i18n = new I18n({
+  locales: ["en", "de"],  // other locales will fallback to en silently
+  fallbacks: { "de-*": "de" },
+  retryInDefaultLocale: true,
+  updateFiles: false, // I hope to avoid write access to the file system
+  queryParameter: 'lang',
+  directory: path.join(__dirname, "locales"),
+});
+console.log("__dirname: ", __dirname);
 
 const app = express();
 
@@ -23,6 +36,7 @@ app.use(express.static("public"));
 app.use(express.json());
 app.use(cookieParser());
 app.use(bodyParser.urlencoded({ extended: true }));
+app.use(i18n.init); // default: using 'accept-language' header to guess language settings
 
 // view engine
 app.set("view engine", "ejs");

dist/app.js

@@ -23,12 +23,25 @@ require("dotenv").config();
 const bodyParser = require("body-parser");
 const jsonwebtoken_1 = __importDefault(require("jsonwebtoken"));
 var QRCode = require("qrcode");
+const { I18n } = require("i18n");
+const path = require("path");
+// we must ensure that no write access to the file system is needed; as we are running on a readonly serverless platform
+const i18n = new I18n({
+    locales: ["en", "de"],
+    fallbacks: { "de-*": "de" },
+    retryInDefaultLocale: true,
+    updateFiles: false,
+    queryParameter: 'lang',
+    directory: path.join(__dirname, "locales"),
+});
+console.log("__dirname: ", __dirname);
 const app = express();
 // middleware
 app.use(express.static("public"));
 app.use(express.json());
 app.use(cookieParser());
 app.use(bodyParser.urlencoded({ extended: true }));
+app.use(i18n.init); // default: using 'accept-language' header to guess language settings
 // view engine
 app.set("view engine", "ejs");
 // database connection

dist/locales/de.json

@@ -0,0 +1,12 @@
+{
+  "appName": "HSC Leihnoten Verwaltung",
+  "Ausleihen anzeigen": "Ausleihen anzeigen",
+  "QRCode für Login anzeigen": "QRCode für Login anzeigen",
+  "Noten": "Noten",
+  "Leihnoten registrieren": "Leihnoten registrieren",
+  "Noten Ausleihe": "Noten Ausleihe",
+  "Noten Rückgabe": "Noten Rückgabe",
+  "Benutzer": "Benutzer",
+  "Benutzer anlegen": "Benutzer anlegen",
+  "Benutzer Liste": "Benutzer Liste"
+}

dist/locales/en.json

@@ -0,0 +1,12 @@
+{
+	"appName": "HSC rental score management",
+	"Noten": "Scores",
+	"Leihnoten registrieren": "Register rental scores",
+	"Noten Ausleihe": "Checkout score",
+	"Noten Rückgabe": "Return score",
+	"Ausleihen anzeigen": "Show checkouts",
+	"Benutzer": "User",
+	"Benutzer anlegen": "Register user",
+	"Benutzer Liste": "User list",
+	"QRCode für Login anzeigen": "Show QR code for login"
+}

locales/de.json

@@ -0,0 +1,12 @@
+{
+  "appName": "HSC Leihnoten Verwaltung",
+  "Ausleihen anzeigen": "Ausleihen anzeigen",
+  "QRCode für Login anzeigen": "QRCode für Login anzeigen",
+  "Noten": "Noten",
+  "Leihnoten registrieren": "Leihnoten registrieren",
+  "Noten Ausleihe": "Noten Ausleihe",
+  "Noten Rückgabe": "Noten Rückgabe",
+  "Benutzer": "Benutzer",
+  "Benutzer anlegen": "Benutzer anlegen",
+  "Benutzer Liste": "Benutzer Liste"
+}

locales/en.json

@@ -0,0 +1,12 @@
+{
+	"appName": "HSC rental score management",
+	"Noten": "Scores",
+	"Leihnoten registrieren": "Register rental scores",
+	"Noten Ausleihe": "Checkout score",
+	"Noten Rückgabe": "Return score",
+	"Ausleihen anzeigen": "Show checkouts",
+	"Benutzer": "User",
+	"Benutzer anlegen": "Register user",
+	"Benutzer Liste": "User list",
+	"QRCode für Login anzeigen": "Show QR code for login"
+}