updated JWT to include sessionId and added cookie helpers

packages/backend/src/auth/utils.ts

@@ -2,7 +2,8 @@ import bcrypt from "bcrypt";
 import * as jwt from "jsonwebtoken";
 
 const JWT_EXPIRES_IN = (process.env.JWT_EXPIRES_IN ?? "7d") as jwt.SignOptions["expiresIn"];
-const JWT_ALGORITHM = "HS256";
+const JWT_ALGORITHM = "HS256" as const;
+const COOKIE_MAX_AGE = 7 * 24 * 60 * 60; // 7 days in seconds
 
 const requireJwtSecret = () => {
     const secret = process.env.JWT_SECRET;
@@ -19,9 +20,9 @@ export const hashPassword = (password: string) => bcrypt.hash(password, 10);
 
 export const verifyPassword = (password: string, hash: string) => bcrypt.compare(password, hash);
 
-export const generateToken = (userId: number) => {
+export const generateToken = (sessionId: number, userId: number) => {
     const secret = requireJwtSecret();
-    return jwt.sign({ userId }, secret, {
+    return jwt.sign({ sessionId, userId }, secret, {
         expiresIn: JWT_EXPIRES_IN,
         algorithm: JWT_ALGORITHM,
     });
@@ -31,5 +32,23 @@ export const verifyToken = (token: string) => {
     const secret = requireJwtSecret();
     return jwt.verify(token, secret, {
         algorithms: [JWT_ALGORITHM],
-    }) as { userId: number };
+    }) as { sessionId: number; userId: number };
+};
+
+export const buildAuthCookie = (token: string) => {
+    return `token=${token}; HttpOnly; Secure; SameSite=None; Path=/; Max-Age=${COOKIE_MAX_AGE}`; // it pains me that this is in seconds
+};
+
+export const buildClearAuthCookie = () => {
+    return "token=; HttpOnly; Secure; SameSite=None; Path=/; Max-Age=0";
+};
+
+export const parseCookies = (cookieHeader: string | null): Record<string, string> => {
+    if (!cookieHeader) return {};
+    return Object.fromEntries(
+        cookieHeader.split(";").map((cookie) => {
+            const [key, ...rest] = cookie.trim().split("=");
+            return [key, rest.join("=")];
+        }),
+    );
 };