NetForge/.planning/phases/01-foundation/01-02-SUMMARY.md

phase: 01-foundation plan: "02" subsystem: auth tags: [next-auth, jwt, credentials, bcryptjs, middleware, session, seed] requires: - phase: 01-foundation/01-01 provides: "Next.js 15 App Router scaffold, Prisma schema with Tenant and User models, singleton PrismaClient" provides: - "NextAuth.js v4 credentials provider with JWT sessions carrying tenantId and roles" - "Extended NextAuth types (Session, JWT) with tenantId, roles, isSuperAdmin, firstName, lastName" - "Route protection middleware (src/middleware.ts) redirecting unauthenticated users to /login" - "Login page UI at /login with email/password form, error/loading states" - "Logout via Header component Sign out button (signOut with callbackUrl /login)" - "Server-side auth helpers: getServerSession() and getCurrentUser() in src/lib/auth.ts" - "Seed data: Demo ISP tenant + admin@demo.com (ADMIN) + superadmin@netforge.com (super-admin)" - "8 unit tests for authOptions JWT/session callbacks" affects: - "01-03 (tenant provisioning): reads tenantId from JWT token for tenant context" - "All future plans: getCurrentUser() is the primary auth helper for Server Components" - "Phase 2 (billing/RBAC): roles array in JWT enables RBAC checks" - "Phase 3 (collectors): tenantId in JWT scopes all queries to correct tenant" tech-stack: added: [next-auth@4, bcryptjs@3, @types/bcryptjs, @types/jest, tsx] patterns: - "JWT strategy with 24-hour maxAge — no server-side session storage needed" - "tenantId + roles in JWT token for stateless RBAC and multi-tenancy" - "withAuth middleware from next-auth/middleware for route protection" - "SessionProvider at root layout level (src/components/providers.tsx) for useSession access" - "Seed script uses findFirst+create pattern for null tenantId super-admins (PostgreSQL unique constraint behavior with nulls)" key-files: created: - src/types/next-auth.d.ts - src/lib/auth-options.ts - src/lib/auth.ts - src/app/api/auth/[...nextauth]/route.ts - src/middleware.ts - src/app/(auth)/layout.tsx - src/app/(auth)/login/page.tsx - src/app/(dashboard)/layout.tsx - src/app/(dashboard)/dashboard/page.tsx - src/components/layout/header.tsx - src/components/providers.tsx - prisma/seed.ts - src/lib/tests/auth.test.ts modified: - package.json - src/app/layout.tsx key-decisions: - "Used NextAuth.js v4 (not v5/Auth.js beta) for credentials provider stability" - "JWT carries tenantId and roles directly — no database lookup on each request" - "Super-admin user has tenantId=null; authorize() checks isSuperAdmin OR active tenant status" - "Seed uses findFirst+create instead of upsert for super-admin: PostgreSQL treats NULL != NULL in unique constraints, so upsert on [email, tenantId] with null tenantId creates duplicates" - "Added @types/jest to fix TypeScript type errors for Vitest globals (describe/it/expect)" patterns-established: - "Auth pattern: getCurrentUser() in Server Components, useSession() in Client Components" - "Protected route pattern: middleware handles redirect to /login; individual pages can also call getCurrentUser() for extra safety" - "Dashboard layout pattern: (dashboard) route group has Header + main layout; (auth) group has centered card layout" duration: 8min completed: 2026-03-04

Phase 1 Plan 02: Authentication Summary

NextAuth.js v4 credentials auth with JWT carrying tenantId+roles, /login page, route protection middleware, and idempotent seed data for demo tenant + admin + super-admin users

Performance

• Duration: 8 min
• Started: 2026-03-04T10:34:59Z
• Completed: 2026-03-04T10:42:58Z
• Tasks: 2 completed
• Files modified: 15

Accomplishments

• NextAuth.js v4 configured with CredentialsProvider — email/password auth with bcrypt verification, JWT sessions that embed tenantId and roles for stateless multi-tenancy
• Route protection middleware (withAuth) blocks all non-public routes and redirects unauthenticated users to /login; TypeScript types extended for full session typing
• Login page UI at /login with form validation, error display, loading state, and post-login redirect to /dashboard; Header component with Sign out button in authenticated layout
• Seed script creates Demo ISP tenant + admin@demo.com (ADMIN role) + superadmin@netforge.com (isSuperAdmin, no tenant) using upsert/idempotent pattern
• 8 unit tests for authOptions configuration and JWT/session callback behavior — all passing

Task Commits

1. Task 1: NextAuth.js configuration with credentials provider and JWT - 71a9277 (feat)
2. Task 2: Login page UI, logout flow, seed script, and auth unit tests - 3c37cb1 (feat)

Plan metadata: (to be added in final commit)

Files Created/Modified

• src/types/next-auth.d.ts - Extended NextAuth Session and JWT types with tenantId, roles, isSuperAdmin, firstName, lastName
• src/lib/auth-options.ts - NextAuthOptions: CredentialsProvider, JWT callback, session callback, 24h maxAge
• src/lib/auth.ts - Server helpers: getServerSession() and getCurrentUser()
• src/app/api/auth/[...nextauth]/route.ts - NextAuth GET/POST route handler
• src/middleware.ts - withAuth middleware protecting all routes except /login /signup /api/auth/* /_next/*
• src/app/(auth)/layout.tsx - Centered auth card layout
• src/app/(auth)/login/page.tsx - Login form with email/password, error, loading state, sign up link
• src/app/(dashboard)/layout.tsx - Dashboard layout with Header component
• src/app/(dashboard)/dashboard/page.tsx - Basic dashboard page (post-login landing)
• src/components/layout/header.tsx - Authenticated header with user name + Sign out button
• src/components/providers.tsx - SessionProvider wrapper for client-side useSession()
• prisma/seed.ts - Idempotent seed: Demo ISP tenant, admin user, super-admin user
• src/lib/__tests__/auth.test.ts - 8 unit tests for authOptions
• package.json - Added db:seed script, prisma.seed config, tsx devDependency
• src/app/layout.tsx - Wrapped children with Providers (SessionProvider)

Decisions Made

• NextAuth v4 over v5: v5/Auth.js credentials provider support is still evolving; v4 is the stable production choice for custom JWT + credentials auth
• JWT carries tenantId + roles: No database lookup on each request — token is self-contained. 24h maxAge balances security and UX
• Super-admin authorize logic: Uses OR [{ isSuperAdmin: true }, { tenant: { status: ACTIVE } }] in Prisma query — one query handles both cases
• Seed uses findFirst+create for super-admin: PostgreSQL unique constraint on (email, tenantId) with tenantId=null means NULL != NULL — upsert where clause would create duplicate rows; findFirst+create is explicit and safe
• @types/jest installed: Vitest globals (describe, it, expect) with globals: true config are compatible with @types/jest type definitions, fixing TypeScript errors without needing separate vitest type package

Deviations from Plan

Auto-fixed Issues

1. [Rule 3 - Blocking] Added @types/jest for Vitest globals TypeScript support

• Found during: Task 1 (TypeScript check after creating auth files)
• Issue: npx tsc --noEmit reported errors in setup.test.ts — describe, it, expect unknown without type definitions. Vitest's globals: true config works at runtime but TypeScript needs explicit types
• Fix: npm install -D @types/jest — compatible with Vitest's global API
• Files modified: package.json, package-lock.json
• Verification: npx tsc --noEmit passes with no errors in auth files
• Committed in: 71a9277 (Task 1 commit)

2. [Rule 2 - Missing Critical] Added SessionProvider in root layout

• Found during: Task 2 (creating Header component with useSession)
• Issue: useSession() in Header component requires SessionProvider ancestor — not in the plan but required for the header to function
• Fix: Created src/components/providers.tsx as "use client" SessionProvider wrapper; added to root src/app/layout.tsx
• Files modified: src/components/providers.tsx, src/app/layout.tsx
• Verification: TypeScript check passes; useSession available in all client components
• Committed in: 3c37cb1 (Task 2 commit)

3. [Rule 2 - Missing Critical] Created basic /dashboard page

• Found during: Task 2 (login redirects to /dashboard which didn't exist)
• Issue: Login success redirects to /dashboard but no page existed — would 404 or error
• Fix: Created src/app/(dashboard)/dashboard/page.tsx with welcome message and user info display
• Files modified: src/app/(dashboard)/dashboard/page.tsx
• Verification: Route exists; getCurrentUser() used for server-side auth guard
• Committed in: 3c37cb1 (Task 2 commit)

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Total deviations: 3 auto-fixed (1 blocking, 2 missing critical) Impact on plan: All three fixes were essential for functionality and type safety. No scope creep — the SessionProvider and dashboard page are minimal stubs supporting the auth flow.

Issues Encountered

• Test file type casting for NextAuth callback parameters required as unknown as double-casting due to strict overlap checking between custom User type and NextAuth's internal AdapterUser type — resolved by casting through unknown
• prisma-tenant.ts from parallel plan 01-03 has TypeScript errors (unrelated to this plan's files) — confirmed by running npx tsc 2>&1 | grep "^src" | grep -v prisma-tenant which shows 0 errors in auth files

User Setup Required

None - no external service configuration required. NEXTAUTH_SECRET and NEXTAUTH_URL are already in .env.

Next Phase Readiness

• Auth is fully functional. getCurrentUser() available for all Server Components in Phase 2+
• Seed data ready: admin@demo.com / admin123, superadmin@netforge.com / super123
• JWT token carries tenantId and roles — plan 01-03 (tenant provisioning) and all future plans can read these from session without extra DB queries
• Middleware protects all routes — future plans can add routes without worrying about auth

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Phase: 01-foundation Completed: 2026-03-04