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Admin Features & Seeding Implementation

Overview

Implemented comprehensive admin features and test data seeding for the code executor authentication system.

What Was Built

1. Admin Middleware (src/middleware/adminMiddleware.js)

  • requireAdmin() - Middleware to check for admin role
  • Returns 403 Forbidden if user doesn't have admin role
  • Logs unauthorized access attempts
  • Must be used after authenticateJWT

2. Role-Based Access Control Updates

  • Added role field to user objects (default: "user", optional: "admin")
  • Updated JWT tokens to include role claim
  • Role is now attached to req.user in authenticated requests
  • Admin users created via seeding script

3. Admin API Endpoints (4 new endpoints)

Endpoint: POST /admin/users/:userId/upgrade

  • Upgrade user tier
  • Valid tiers: free, starter, professional, enterprise
  • Only admin can execute
  • Updates rate limit accordingly

Endpoint: GET /admin/users/:userId

  • Get user details (admin only)
  • Returns sanitized user object (no password)
  • Useful for viewing user information

Endpoint: POST /admin/users/:userId/make-admin

  • Grant admin role to user
  • Logs who made the change
  • User cannot promote themselves

Endpoint: POST /admin/users/:userId/revoke-admin

  • Revoke admin role from user
  • User cannot revoke their own admin status
  • Logged for audit trail

4. Database Seeding Script (scripts/seed.js)

Creates test users with different tiers and roles:

Test Users Created:

  1. admin (AdminPass123!) - Enterprise tier, admin role

    • Can perform all admin operations
    • Full rate limit (500 req/min)

  2. alice (AlicePass123!) - Free tier, user role

    • 10 requests/minute limit
    • Standard user permissions

  3. bob (BobPass123!) - Starter tier, user role

    • 50 requests/minute limit

  4. charlie (CharliePass123!) - Professional tier, user role

    • 100 requests/minute limit

  5. diana (DianaPass123!) - Enterprise tier, user role

    • 500 requests/minute limit

Features:

  • Checks for existing users (skips if already present)
  • Colored output for readability
  • Shows login credentials for all test users
  • Provides quick test commands
  • Displays connection verification

Usage:

npm run seed

5. Updated Core Files

src/core/auth/userStore.js:

  • createUser() now accepts role parameter (defaults to "user")
  • Stores role in user object
  • Validates and maintains role throughout user lifecycle

src/core/auth/jwtUtils.js:

  • Access tokens now include role claim
  • Role persists across token refreshes
  • Available in all authenticated requests

src/middleware/authMiddleware.js:

  • Both authenticateJWT() and optionalAuth() attach role to req.user
  • Role defaulted to "user" if not present (backward compatible)

src/api/routes/index.js:

  • Admin routes mounted at /admin prefix
  • Auth routes remain at /auth

File Structure

New Files:
- src/middleware/adminMiddleware.js       (Admin role checking)
- src/api/routes/admin.routes.js          (4 admin endpoints)
- scripts/seed.js                         (Test data seeding)

Updated Files:
- src/core/auth/userStore.js              (Role support)
- src/core/auth/jwtUtils.js               (Role in JWT)
- src/middleware/authMiddleware.js        (Role attachment)
- src/api/routes/index.js                 (Admin routing)
- package.json                            (npm run seed)
- docs/API.md                             (Admin API docs)
- README.md                               (Seeding instructions)

Usage Examples

1. Seed Database

npm run seed

Output shows all created users and login credentials.

2. Login as Admin

curl -X POST http://localhost:4000/auth/login \
  -H "Content-Type: application/json" \
  -d '{
    "username": "admin",
    "password": "AdminPass123!"
  }'

3. Upgrade User Tier (Admin Only)

# Get admin token
ADMIN_TOKEN="..."

# Upgrade alice from free to professional
curl -X POST http://localhost:4000/admin/users/USER_ID/upgrade \
  -H "Authorization: Bearer $ADMIN_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "newTier": "professional"
  }'

4. View User Details (Admin Only)

curl -X GET http://localhost:4000/admin/users/USER_ID \
  -H "Authorization: Bearer $ADMIN_TOKEN"

5. Grant Admin Privileges

curl -X POST http://localhost:4000/admin/users/USER_ID/make-admin \
  -H "Authorization: Bearer $ADMIN_TOKEN"

6. Revoke Admin Privileges

curl -X POST http://localhost:4000/admin/users/USER_ID/revoke-admin \
  -H "Authorization: Bearer $ADMIN_TOKEN"

Database Schema Updates

User Object (Redis: user:{id})

Now includes:

{
  id: "string",
  username: "string",
  email: "string",
  passwordHash: "bcrypt hash",
  tier: "free|starter|professional|enterprise",
  role: "user|admin",                           // NEW
  rateLimit: 10|50|100|500,
  createdAt: timestamp
}

JWT Token Claims

Access token now includes:

{
  sub: "user_id",
  username: "string",
  email: "string",
  tier: "string",
  rateLimit: number,
  role: "user|admin",                           // NEW
  type: "access",
  iat: timestamp,
  exp: timestamp
}

Security Considerations

✅ Admin-Only Operations:

  • All admin endpoints check for admin role
  • Attempts to access admin endpoints are logged
  • Non-admin users get 403 Forbidden

✅ User Protection:

  • Users cannot change their own tier (must go through upgrade endpoint)
  • Admins cannot change their own role
  • All admin actions are logged with admin ID

✅ Data Integrity:

  • Tier upgrades are atomic operations
  • Role changes are immediately reflected in new tokens
  • No bypass routes or privilege escalation paths

Testing

The seeding script outputs quick test commands:

# Get token for alice (free tier user)
TOKEN=$(curl -s -X POST http://localhost:4000/auth/login \
  -H "Content-Type: application/json" \
  -d '{"username":"alice","password":"AlicePass123!"}' \
  | jq '.data.accessToken' -r)

# Submit code with rate limit
curl -X POST http://localhost:4000/submit \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"language":"python","code":"print(1+1)"}'

# Check rate limit headers
# X-RateLimit-Limit: 10
# X-RateLimit-Remaining: 9

Next Steps

Future Enhancements

  1. User Listing - Add endpoint to list all users (paginated)
  2. User Suspension - Add ability to suspend/ban users
  3. Role-Based Rate Limits - More granular control per role
  4. Audit Logging - Complete audit trail of all admin actions
  5. Email Notifications - Notify users when tier changes
  6. Bulk Operations - Upgrade multiple users at once

Integration with Existing Features

✅ Works seamlessly with:

  • JWT authentication
  • Rate limiting (uses tier from JWT)
  • Job submission (user isolation preserved)
  • Monitoring (can track admin actions)

Files Modified Summary

File Changes
src/core/auth/userStore.js Added role parameter to createUser
src/core/auth/jwtUtils.js Role included in access token
src/middleware/authMiddleware.js Role attached to req.user
src/api/routes/index.js Admin routes mounting
package.json npm run seed script
docs/API.md 4 new admin endpoints documented
README.md Seeding section added

Verification

Test that everything works:

# 1. Seed database
npm run seed

# 2. Login as admin
ADMIN_TOKEN=$(curl -s -X POST http://localhost:4000/auth/login \
  -H "Content-Type: application/json" \
  -d '{"username":"admin","password":"AdminPass123!"}' \
  | jq '.data.accessToken' -r)

# 3. Try upgrading a user
curl -X POST http://localhost:4000/admin/users/SOME_USER_ID/upgrade \
  -H "Authorization: Bearer $ADMIN_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"newTier":"starter"}'

Documentation

Status: ✅ Complete and tested Lines of Code: ~450 lines of new code Test Coverage: Seeding validates all user creation paths