chore: migrate to PostgreSQL with Prisma

lib/users.ts

@@ -16,54 +16,34 @@
  *   USER_1_DOMAINS="aveminakarabudak.com"
  */
 
+import { prisma } from "./prisma";
+
 export interface AppUser {
-  id: string;           // "user_0", "user_1", ...
-  name: string;
+  id: string;
+  name: string | null;
   email: string;
-  password: string;     // plain text — store hashed in prod or use secrets manager
-  role: "SUPER_ADMIN" | "DOMAIN_ADMIN";
-  domains: string[];    // ["*"] for super admin, ["domain.com"] for domain admins
-  telegramId?: string;  // Optional Telegram ID for notifications
+  password: string;
+  role: string;
+  domains: string[];
+  telegramId?: string | null;
 }
 
-/** Load all users defined in environment variables */
-export function getUsers(): AppUser[] {
-  const users: AppUser[] = [];
-
-  let i = 0;
-  while (true) {
-    const name = process.env[`USER_${i}_NAME`];
-    const email = process.env[`USER_${i}_EMAIL`];
-    const password = process.env[`USER_${i}_PASSWORD`];
-    const role = process.env[`USER_${i}_ROLE`] as AppUser["role"];
-    const domainsRaw = process.env[`USER_${i}_DOMAINS`] ?? "";
-    const telegramId = process.env[`USER_${i}_TELEGRAM_ID`];
-
-    if (!name || !email || !password) break;
-
-    users.push({
-      id: `user_${i}`,
-      name,
-      email,
-      password,
-      role: role ?? "DOMAIN_ADMIN",
-      domains: domainsRaw === "*" ? ["*"] : domainsRaw.split(",").map((d) => d.trim()).filter(Boolean),
-      telegramId,
-    });
-
-    i++;
-  }
-
-  return users;
+/** Load all users from database */
+export async function getUsers(): Promise<AppUser[]> {
+  const users = await prisma.user.findMany();
+  return users as AppUser[];
 }
 
-/** Find user by email and validate password */
-export function authenticateUser(email: string, password: string): AppUser | null {
-  const users = getUsers();
-  const user = users.find((u) => u.email.toLowerCase() === email.toLowerCase());
+/** Find user by email and validate password via database */
+export async function authenticateUser(email: string, password: string): Promise<AppUser | null> {
+  const user = await prisma.user.findUnique({
+    where: { email: email.toLowerCase() },
+  });
+  
   if (!user) return null;
   if (user.password !== password) return null;
-  return user;
+  
+  return user as AppUser;
 }
 
 /** Check if a user has access to a specific domain */