fix: persist user locale preference to database (#1547)

server/routers/user/updateUserLocale.ts

@@ -0,0 +1,57 @@
+import { Request, Response, NextFunction } from "express";
+import { z } from "zod";
+import { db } from "@server/db";
+import { users } from "@server/db";
+import { eq } from "drizzle-orm";
+import response from "@server/lib/response";
+import HttpCode from "@server/types/HttpCode";
+import createHttpError from "http-errors";
+import logger from "@server/logger";
+import { fromError } from "zod-validation-error";
+
+const bodySchema = z.strictObject({
+    locale: z.string().min(2).max(10)
+});
+
+export async function updateUserLocale(
+    req: Request,
+    res: Response,
+    next: NextFunction
+): Promise<any> {
+    try {
+        const userId = req.user?.userId;
+
+        if (!userId) {
+            return next(
+                createHttpError(HttpCode.UNAUTHORIZED, "User not found")
+            );
+        }
+
+        const parsedBody = bodySchema.safeParse(req.body);
+        if (!parsedBody.success) {
+            return next(
+                createHttpError(
+                    HttpCode.BAD_REQUEST,
+                    fromError(parsedBody.error).toString()
+                )
+            );
+        }
+
+        const { locale } = parsedBody.data;
+
+        await db.update(users).set({ locale }).where(eq(users.userId, userId));
+
+        return response(res, {
+            data: null,
+            success: true,
+            error: false,
+            message: "User locale updated successfully",
+            status: HttpCode.OK
+        });
+    } catch (error) {
+        logger.error(error);
+        return next(
+            createHttpError(HttpCode.INTERNAL_SERVER_ERROR, "An error occurred")
+        );
+    }
+}