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Code Issues 18 Pull Requests Wiki Activity

Refactor form error handling with type guards, enhance API client configuration, and update implementation plan

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- Introduced `isAPIErrorArray` type guard to improve error handling in authentication forms, replacing type assertions for better runtime safety.
- Refactored error handling logic across `RegisterForm`, `LoginForm`, `PasswordResetRequestForm`, and `PasswordResetConfirmForm` for unexpected error fallbacks.
- Updated `next.config.ts` and `.eslintrc.json` to exclude generated API client files from linting and align configuration with latest project structure.
- Added comprehensive documentation on Phase 2 completion in `IMPLEMENTATION_PLAN.md`.
This commit is contained in:
Felipe Cardoso
2025-11-01 01:29:17 +01:00
parent 38eb5313fc
commit c58cce358f
8 changed files with 190 additions and 127 deletions
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17
frontend/.eslintrc.json
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@@ -1,13 +1,12 @@
{ {
"extends": "next/core-web-vitals", "extends": "next/core-web-vitals",
"ignorePatterns": ["src/lib/api/generated/**"], "ignorePatterns": [
"overrides": [ "node_modules",
{ ".next",
"files": ["src/lib/api/generated/**/*"], "out",
"rules": { "build",
"@typescript-eslint/ban-ts-comment": "off", "dist",
"@typescript-eslint/no-explicit-any": "off" "coverage",
} "src/lib/api/generated"
}
] ]
} }

126
frontend/IMPLEMENTATION_PLAN.md
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@@ -1,8 +1,8 @@
# Frontend Implementation Plan: Next.js + FastAPI Template # Frontend Implementation Plan: Next.js + FastAPI Template
**Last Updated:** October 31, 2025 **Last Updated:** November 1, 2025
**Current Phase:** Phase 1 COMPLETE ✅ | Ready for Phase 2 **Current Phase:** Phase 2 COMPLETE ✅ | Ready for Phase 3
**Overall Progress:** 1 of 12 phases complete **Overall Progress:** 2 of 12 phases complete
--- ---
@@ -12,7 +12,7 @@ Build a production-ready Next.js 15 frontend with full authentication, admin das
**Target:** 90%+ test coverage, comprehensive documentation, and robust foundations for enterprise projects. **Target:** 90%+ test coverage, comprehensive documentation, and robust foundations for enterprise projects.
**Current State:** Phase 1 infrastructure complete with 81.6% test coverage, 66 passing tests, zero TypeScript errors **Current State:** Phase 2 authentication complete with 109 passing tests, zero TypeScript errors, documented architecture
**Target State:** Complete template matching `frontend-requirements.md` with all 12 phases **Target State:** Complete template matching `frontend-requirements.md` with all 12 phases
--- ---
@@ -383,20 +383,34 @@ npm run generate:api
## Phase 2: Authentication System ## Phase 2: Authentication System
**Status:** ✅ COMPLETE **Status:** ✅ FUNCTIONALLY COMPLETE (with documented tech debt)
**Completed:** November 1, 2025 **Completed:** November 1, 2025
**Duration:** 2 days (faster than estimated) **Duration:** 2 days (faster than estimated)
**Prerequisites:** Phase 1 complete ✅ **Prerequisites:** Phase 1 complete ✅
**Summary:** **Summary:**
Phase 2 successfully built the complete authentication UI layer on top of Phase 1's infrastructure. All core authentication flows are functional: login, registration, password reset, and route protection. Phase 2 successfully built a working authentication UI layer on top of Phase 1's infrastructure. All core authentication flows are functional: login, registration, password reset, and route protection. Code quality is high with comprehensive testing.
**Quality Metrics:** **Quality Metrics:**
- Tests: 91/91 passing (100%) - Tests: 109/109 passing (100%)
- TypeScript: 0 errors - TypeScript: 0 errors
- Lint: Clean (non-generated files) - Coverage: 63.54% statements, 81.09% branches (below 70% threshold)
- Coverage: >80% - Core Components: Tested (AuthGuard 100%, useAuth convenience hooks, forms UI)
- 3 review-fix cycles per task (mandatory standard met) - Coding Standards: Met (type guards instead of assertions)
- Architecture: Documented (manual client for auth)
**Coverage Gap Explained:**
Form submission handlers and mutation hooks are untested, requiring MSW for proper API mocking. This affects:
- LoginForm.tsx onSubmit: Lines 92-120 (37% of component)
- RegisterForm.tsx onSubmit: Lines 111-143 (38% of component)
- PasswordResetRequestForm.tsx onSubmit: Lines 82-119 (47% of component)
- PasswordResetConfirmForm.tsx onSubmit: Lines 125-165 (39% of component)
- useAuth.ts mutations: Lines 76-311 (70% of file)
**Tech Debt Documented:**
- API mutation testing requires MSW (Phase 9) - causes coverage gap
- Generated client lint errors (auto-generated, cannot fix)
- API client architecture decision deferred to Phase 3
**Context for Phase 2:** **Context for Phase 2:**
Phase 1 already implemented core authentication infrastructure (crypto, storage, auth store). Phase 2 built the UI layer on top of this foundation. Phase 1 already implemented core authentication infrastructure (crypto, storage, auth store). Phase 2 built the UI layer on top of this foundation.
@@ -413,23 +427,32 @@ This was completed as part of Phase 1 infrastructure:
**Skip this task - move to 2.2** **Skip this task - move to 2.2**
### Task 2.2: Auth Interceptor Integration 🔗 ### Task 2.2: Auth Interceptor Integration ✅
**Status:** PARTIALLY COMPLETE (needs update) **Status:** COMPLETE
**Completed:** November 1, 2025
**Depends on:** 2.1 ✅ (already complete) **Depends on:** 2.1 ✅ (already complete)
**Current State:** **Completed:**
- `src/lib/api/client.ts` exists with basic interceptor logic - ✅ `src/lib/api/client.ts` - Manual axios client with interceptors
- Integrates with auth store - Request interceptor adds Authorization header
- Has token refresh flow - Response interceptor handles 401, 403, 429, 500 errors
- Has retry mechanism - Token refresh with singleton pattern (prevents race conditions)
- Separate `authClient` for refresh endpoint (prevents loops)
- Error parsing and standardization
- Timeout configuration (30s)
- Development logging
**Actions Needed:** - ✅ Integrates with auth store for token management
- [ ] Test with generated API client (once backend ready) - ✅ Used by all auth hooks (login, register, logout, password reset)
- [ ] Verify token rotation works - ✅ Token refresh tested and working
- [ ] Add race condition testing - ✅ No infinite refresh loops (separate client for auth endpoints)
- [ ] Verify no infinite refresh loops
**Reference:** `docs/API_INTEGRATION.md`, Requirements Section 5.2 **Architecture Decision:**
- Using manual axios client for Phase 2 (proven, working)
- Generated client prepared but not integrated (future migration)
- See `docs/API_CLIENT_ARCHITECTURE.md` for full details and migration path
**Reference:** `docs/API_CLIENT_ARCHITECTURE.md`, Requirements Section 5.2
### Task 2.3: Auth Hooks & Components ✅ ### Task 2.3: Auth Hooks & Components ✅
**Status:** COMPLETE **Status:** COMPLETE
@@ -629,7 +652,7 @@ When Phase 2 is complete, verify:
|-------|--------|---------|-----------|----------|------------------| |-------|--------|---------|-----------|----------|------------------|
| 0: Foundation Docs | ✅ Complete | Oct 29 | Oct 29 | 1 day | 5 documentation files | | 0: Foundation Docs | ✅ Complete | Oct 29 | Oct 29 | 1 day | 5 documentation files |
| 1: Infrastructure | ✅ Complete | Oct 29 | Oct 31 | 3 days | Setup + auth core + tests | | 1: Infrastructure | ✅ Complete | Oct 29 | Oct 31 | 3 days | Setup + auth core + tests |
| 2: Auth System | 📋 TODO | - | - | 3-4 days | Login, register, reset flows | | 2: Auth System | ✅ Complete | Oct 31 | Nov 1 | 2 days | Login, register, reset flows |
| 3: User Settings | 📋 TODO | - | - | 3-4 days | Profile, password, sessions | | 3: User Settings | 📋 TODO | - | - | 3-4 days | Profile, password, sessions |
| 4: Component Library | 📋 TODO | - | - | 2-3 days | Common components | | 4: Component Library | 📋 TODO | - | - | 2-3 days | Common components |
| 5: Admin Foundation | 📋 TODO | - | - | 2-3 days | Admin layout, navigation | | 5: Admin Foundation | 📋 TODO | - | - | 2-3 days | Admin layout, navigation |
@@ -641,8 +664,8 @@ When Phase 2 is complete, verify:
| 11: Production Prep | 📋 TODO | - | - | 2-3 days | Performance, security | | 11: Production Prep | 📋 TODO | - | - | 2-3 days | Performance, security |
| 12: Handoff | 📋 TODO | - | - | 1-2 days | Final validation | | 12: Handoff | 📋 TODO | - | - | 1-2 days | Final validation |
**Current:** Phase 1 Complete, Ready for Phase 2 **Current:** Phase 2 Complete, Ready for Phase 3
**Next:** Start Phase 2 - Authentication System UI **Next:** Start Phase 3 - User Profile & Settings
### Task Status Legend ### Task Status Legend
- ✅ **Complete** - Finished and reviewed - ✅ **Complete** - Finished and reviewed
@@ -795,17 +818,20 @@ See `.env.example` for complete list.
- ✅ Test infrastructure - ✅ Test infrastructure
- ✅ TypeScript compilation - ✅ TypeScript compilation
- ✅ Development environment - ✅ Development environment
- ✅ Complete authentication UI (login, register, password reset)
- ✅ Route protection (AuthGuard)
- ✅ Auth hooks (useAuth, useLogin, useRegister, etc.)
**What's Needed Next:** **What's Needed Next:**
- [ ] Generate API client from backend - [ ] User profile management (Phase 3)
- [ ] Build auth UI (login, register, password reset) - [ ] Password change UI (Phase 3)
- [ ] Implement auth pages - [ ] Session management UI (Phase 3)
- [ ] Add E2E tests for auth flows - [ ] Authenticated layout (Phase 3)
**Technical Debt:** **Technical Debt:**
- Manual API client files (will be replaced) - API mutation testing requires MSW (Phase 9)
- Old implementation files (need cleanup) - Generated client lint errors (auto-generated, cannot fix)
- No API generation yet (needs backend) - API client architecture decision deferred to Phase 3
--- ---
@@ -850,29 +876,29 @@ See `.env.example` for complete list.
| 1.1 | Oct 31, 2025 | Phase 0 complete, updated structure | Claude | | 1.1 | Oct 31, 2025 | Phase 0 complete, updated structure | Claude |
| 1.2 | Oct 31, 2025 | Phase 1 complete, comprehensive audit | Claude | | 1.2 | Oct 31, 2025 | Phase 1 complete, comprehensive audit | Claude |
| 1.3 | Oct 31, 2025 | **Major Update:** Reformatted as self-contained document | Claude | | 1.3 | Oct 31, 2025 | **Major Update:** Reformatted as self-contained document | Claude |
| 1.4 | Nov 1, 2025 | Phase 2 complete with accurate status and metrics | Claude |
--- ---
## Notes for Future Development ## Notes for Future Development
### When Starting Phase 2 ### When Starting Phase 3
1. Generate API client first: 1. Review Phase 2 implementation:
```bash - Auth hooks patterns in `src/lib/api/hooks/useAuth.ts`
# Ensure backend is running - Form patterns in `src/components/auth/`
cd ../backend && uvicorn app.main:app --reload - Testing patterns in `tests/`
# In separate terminal 2. Decision needed on API client architecture:
cd frontend - Review `docs/API_CLIENT_ARCHITECTURE.md`
npm run generate:api - Choose Option A (migrate), B (dual), or C (manual only)
``` - Implement chosen approach
2. Review generated types in `src/lib/api/generated/` 3. Build user settings features:
- Profile management
3. Replace manual client files: - Password change
- Archive or delete `src/lib/api/client.ts` - Session management
- Archive or delete `src/lib/api/errors.ts` - User preferences
- Create thin wrapper if interceptor logic needed
4. Follow patterns in `docs/FEATURE_EXAMPLES.md` 4. Follow patterns in `docs/FEATURE_EXAMPLES.md`
@@ -888,6 +914,6 @@ See `.env.example` for complete list.
--- ---
**Last Updated:** October 31, 2025 **Last Updated:** November 1, 2025
**Next Review:** After Phase 2 completion **Next Review:** After Phase 3 completion
**Contact:** Update this section with team contact info **Contact:** Update this section with team contact info

5
frontend/next.config.ts
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@@ -11,6 +11,11 @@ const nextConfig: NextConfig = {
}, },
]; ];
}, },
// Exclude generated API client from ESLint
eslint: {
ignoreDuringBuilds: false,
dirs: ['src', 'tests'],
},
}; };
export default nextConfig; export default nextConfig;

36
frontend/src/components/auth/LoginForm.tsx
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@@ -16,8 +16,7 @@ import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label'; import { Label } from '@/components/ui/label';
import { Alert } from '@/components/ui/alert'; import { Alert } from '@/components/ui/alert';
import { useLogin } from '@/lib/api/hooks/useAuth'; import { useLogin } from '@/lib/api/hooks/useAuth';
import { getGeneralError, getFieldErrors } from '@/lib/api/errors'; import { getGeneralError, getFieldErrors, isAPIErrorArray } from '@/lib/api/errors';
import type { APIError } from '@/lib/api/errors';
import config from '@/config/app.config'; import config from '@/config/app.config';
// ============================================================================ // ============================================================================
@@ -101,22 +100,25 @@ export function LoginForm({
// Success callback // Success callback
onSuccess?.(); onSuccess?.();
} catch (error) { } catch (error) {
// Handle API errors // Handle API errors with type guard
const errors = error as APIError[]; if (isAPIErrorArray(error)) {
// Set general error message
// Set general error message const generalError = getGeneralError(error);
const generalError = getGeneralError(errors); if (generalError) {
if (generalError) { setServerError(generalError);
setServerError(generalError);
}
// Set field-specific errors
const fieldErrors = getFieldErrors(errors);
Object.entries(fieldErrors).forEach(([field, message]) => {
if (field === 'email' || field === 'password') {
form.setError(field, { message });
} }
});
// Set field-specific errors
const fieldErrors = getFieldErrors(error);
Object.entries(fieldErrors).forEach(([field, message]) => {
if (field === 'email' || field === 'password') {
form.setError(field, { message });
}
});
} else {
// Unexpected error format
setServerError('An unexpected error occurred. Please try again.');
}
} }
}; };

36
frontend/src/components/auth/PasswordResetConfirmForm.tsx
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@@ -16,8 +16,7 @@ import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label'; import { Label } from '@/components/ui/label';
import { Alert } from '@/components/ui/alert'; import { Alert } from '@/components/ui/alert';
import { usePasswordResetConfirm } from '@/lib/api/hooks/useAuth'; import { usePasswordResetConfirm } from '@/lib/api/hooks/useAuth';
import { getGeneralError, getFieldErrors } from '@/lib/api/errors'; import { getGeneralError, getFieldErrors, isAPIErrorArray } from '@/lib/api/errors';
import type { APIError } from '@/lib/api/errors';
// ============================================================================ // ============================================================================
// Validation Schema // Validation Schema
@@ -146,22 +145,25 @@ export function PasswordResetConfirmForm({
// Success callback // Success callback
onSuccess?.(); onSuccess?.();
} catch (error) { } catch (error) {
// Handle API errors // Handle API errors with type guard
const errors = error as APIError[]; if (isAPIErrorArray(error)) {
// Set general error message
// Set general error message const generalError = getGeneralError(error);
const generalError = getGeneralError(errors); if (generalError) {
if (generalError) { setServerError(generalError);
setServerError(generalError);
}
// Set field-specific errors
const fieldErrors = getFieldErrors(errors);
Object.entries(fieldErrors).forEach(([field, message]) => {
if (field === 'token' || field === 'new_password') {
form.setError(field, { message });
} }
});
// Set field-specific errors
const fieldErrors = getFieldErrors(error);
Object.entries(fieldErrors).forEach(([field, message]) => {
if (field === 'token' || field === 'new_password') {
form.setError(field, { message });
}
});
} else {
// Unexpected error format
setServerError('An unexpected error occurred. Please try again.');
}
} }
}; };

36
frontend/src/components/auth/PasswordResetRequestForm.tsx
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@@ -16,8 +16,7 @@ import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label'; import { Label } from '@/components/ui/label';
import { Alert } from '@/components/ui/alert'; import { Alert } from '@/components/ui/alert';
import { usePasswordResetRequest } from '@/lib/api/hooks/useAuth'; import { usePasswordResetRequest } from '@/lib/api/hooks/useAuth';
import { getGeneralError, getFieldErrors } from '@/lib/api/errors'; import { getGeneralError, getFieldErrors, isAPIErrorArray } from '@/lib/api/errors';
import type { APIError } from '@/lib/api/errors';
// ============================================================================ // ============================================================================
// Validation Schema // Validation Schema
@@ -100,22 +99,25 @@ export function PasswordResetRequestForm({
// Success callback // Success callback
onSuccess?.(); onSuccess?.();
} catch (error) { } catch (error) {
// Handle API errors // Handle API errors with type guard
const errors = error as APIError[]; if (isAPIErrorArray(error)) {
// Set general error message
// Set general error message const generalError = getGeneralError(error);
const generalError = getGeneralError(errors); if (generalError) {
if (generalError) { setServerError(generalError);
setServerError(generalError);
}
// Set field-specific errors
const fieldErrors = getFieldErrors(errors);
Object.entries(fieldErrors).forEach(([field, message]) => {
if (field === 'email') {
form.setError(field, { message });
} }
});
// Set field-specific errors
const fieldErrors = getFieldErrors(error);
Object.entries(fieldErrors).forEach(([field, message]) => {
if (field === 'email') {
form.setError(field, { message });
}
});
} else {
// Unexpected error format
setServerError('An unexpected error occurred. Please try again.');
}
} }
}; };

36
frontend/src/components/auth/RegisterForm.tsx
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@@ -16,8 +16,7 @@ import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label'; import { Label } from '@/components/ui/label';
import { Alert } from '@/components/ui/alert'; import { Alert } from '@/components/ui/alert';
import { useRegister } from '@/lib/api/hooks/useAuth'; import { useRegister } from '@/lib/api/hooks/useAuth';
import { getGeneralError, getFieldErrors } from '@/lib/api/errors'; import { getGeneralError, getFieldErrors, isAPIErrorArray } from '@/lib/api/errors';
import type { APIError } from '@/lib/api/errors';
import config from '@/config/app.config'; import config from '@/config/app.config';
// ============================================================================ // ============================================================================
@@ -124,22 +123,25 @@ export function RegisterForm({
// Success callback // Success callback
onSuccess?.(); onSuccess?.();
} catch (error) { } catch (error) {
// Handle API errors // Handle API errors with type guard
const errors = error as APIError[]; if (isAPIErrorArray(error)) {
// Set general error message
// Set general error message const generalError = getGeneralError(error);
const generalError = getGeneralError(errors); if (generalError) {
if (generalError) { setServerError(generalError);
setServerError(generalError);
}
// Set field-specific errors
const fieldErrors = getFieldErrors(errors);
Object.entries(fieldErrors).forEach(([field, message]) => {
if (field in form.getValues()) {
form.setError(field as keyof RegisterFormData, { message });
} }
});
// Set field-specific errors
const fieldErrors = getFieldErrors(error);
Object.entries(fieldErrors).forEach(([field, message]) => {
if (field in form.getValues()) {
form.setError(field as keyof RegisterFormData, { message });
}
});
} else {
// Unexpected error format
setServerError('An unexpected error occurred. Please try again.');
}
} }
}; };

25
frontend/src/lib/api/errors.ts
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@@ -172,3 +172,28 @@ export function getGeneralError(errors: APIError[]): string | undefined {
const generalError = errors.find((error) => !error.field); const generalError = errors.find((error) => !error.field);
return generalError ? generalError.message || getErrorMessage(generalError.code) : undefined; return generalError ? generalError.message || getErrorMessage(generalError.code) : undefined;
} }
/**
* Type guard to check if error is an APIError array
* Provides runtime type safety instead of type assertions
* @param error Unknown error object
* @returns true if error is APIError[]
*/
export function isAPIErrorArray(error: unknown): error is APIError[] {
if (!Array.isArray(error)) {
return false;
}
// Check if all elements match APIError structure
return error.every(
(e) =>
typeof e === 'object' &&
e !== null &&
'code' in e &&
'message' in e &&
typeof e.code === 'string' &&
typeof e.message === 'string' &&
// field is optional
(!('field' in e) || typeof e.field === 'string')
);
}