veza/docs/PLAN_V0_803_IMPLEMENTATION.md

# Plan d'implémentation v0.803 — Sécurité, Compliance & Outillage Dev

## État des lieux

| Feature | Backend | Frontend | Tests |
|---------|---------|----------|-------|
| Rate limiting | ✅ Redis | — | ✅ |
| CORS | ✅ | — | ❌ |
| CSP/HSTS/security headers | ❌ | — | ❌ |
| Audit logs | ❌ | ❌ | ❌ |
| Account deletion | ❌ | ❌ | ❌ |
| OpenAPI/Swagger | ❌ | — | ❌ |
| API keys | ⚠️ basic | ⚠️ developer page | ❌ |
| Moderation queue | ❌ | ❌ | ❌ |
| Maintenance mode | ❌ | — | ❌ |
| Announcements | ❌ | ❌ | ❌ |
| Feature flags UI | ❌ | ❌ | ❌ |

---

## Fichiers existants clés

- Middleware : [`internal/middleware/`](veza-backend-api/internal/middleware/) (auth.go, cors.go, csrf.go, rate_limiter.go)
- Admin handler : [`admin_handler.go`](veza-backend-api/internal/handlers/admin_handler.go)
- Developer page : [`apps/web/src/features/developer/`](apps/web/src/features/developer/)
- Admin pages : [`apps/web/src/features/admin/`](apps/web/src/features/admin/)
- User handler : [`user_handler.go`](veza-backend-api/internal/handlers/) (for account deletion)

---

## Step 1 : Security headers middleware (SEC1-01 to SEC1-03)

**Fichier** : `veza-backend-api/internal/middleware/security_headers.go` (nouveau)

```go
package middleware

import "github.com/gin-gonic/gin"

func SecurityHeaders(isProd bool) gin.HandlerFunc {
    return func(c *gin.Context) {
        c.Header("X-Content-Type-Options", "nosniff")
        c.Header("X-Frame-Options", "DENY")
        c.Header("Referrer-Policy", "strict-origin-when-cross-origin")
        c.Header("Permissions-Policy", "camera=(), microphone=(self), geolocation=()")
        c.Header("Content-Security-Policy",
            "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; "+
            "img-src 'self' data: https:; connect-src 'self' wss: https:; font-src 'self'")
        if isProd {
            c.Header("Strict-Transport-Security", "max-age=31536000; includeSubDomains; preload")
        }
        c.Next()
    }
}
```

Register in `internal/api/router.go` : `router.Use(middleware.SecurityHeaders(config.IsProd))`

**Commit** : `feat(security): add CSP, HSTS, X-Frame-Options, security headers middleware`

---

## Step 2 : DDoS rate limiting amélioré (SEC1-04)

**Fichier** : `veza-backend-api/internal/middleware/rate_limiter.go` — ajouter :
- Global rate limit (1000 req/s total)
- Per-IP rate limit (100 req/s)
- Per-endpoint custom limits via config map

**Commit** : `feat(security): enhanced DDoS rate limiting with global and per-IP limits`

---

## Step 3 : Audit logs (SEC2-01 to SEC2-04)

**Fichier** : `migrations/123_audit_logs.sql` (nouveau)

```sql
CREATE TABLE IF NOT EXISTS audit_logs (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID REFERENCES users(id) ON DELETE SET NULL,
    action VARCHAR(100) NOT NULL,
    resource_type VARCHAR(100) NOT NULL,
    resource_id VARCHAR(255),
    ip_address VARCHAR(45),
    user_agent TEXT,
    metadata JSONB DEFAULT '{}',
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);
CREATE INDEX idx_audit_logs_user_id ON audit_logs(user_id);
CREATE INDEX idx_audit_logs_action ON audit_logs(action);
CREATE INDEX idx_audit_logs_created_at ON audit_logs(created_at);
```

**Fichier** : `veza-backend-api/internal/audit/service.go` (nouveau)

```go
type AuditService struct {
    db *gorm.DB
    logger *zap.Logger
}

func (s *AuditService) Log(ctx context.Context, entry AuditEntry) error {
    return s.db.Create(&entry).Error
}

func (s *AuditService) List(ctx context.Context, filters AuditFilters) ([]AuditEntry, int64, error) {
    // pagination, filters by user_id, action, date range
}
```

**Fichier** : `veza-backend-api/internal/middleware/audit.go` (nouveau) — middleware qui log automatiquement POST/PUT/DELETE

**Fichier** : `veza-backend-api/internal/handlers/admin_handler.go` — ajouter `GET /admin/audit-logs`

**Commit** : `feat(audit): audit logs table, service, middleware, admin endpoint`

---

## Step 4 : Account deletion (SEC2-05)

**Fichier** : `veza-backend-api/internal/handlers/user_handler.go` — ajouter `DELETE /users/me` :

```go
func (h *UserHandler) DeleteAccount(c *gin.Context) {
    userID, ok := GetUserIDUUID(c)
    if !ok { return }
    // 1. Soft delete user
    // 2. Anonymize: username → "deleted-{uuid}", email → "deleted-{uuid}@veza.app"
    // 3. Delete S3 files (cloud, tracks, avatars)
    // 4. Revoke all sessions (delete from sessions table)
    // 5. Audit log: "account_deleted"
    RespondSuccess(c, http.StatusOK, gin.H{"message": "Account deleted"})
}
```

**Commit** : `feat(users): account deletion with data anonymization and S3 cleanup`

---

## Step 5 : OpenAPI/Swagger (DEV1-01, DEV1-02)

```bash
cd veza-backend-api && go install github.com/swaggo/swag/cmd/swag@latest
```

Add swaggo annotations to key handlers (auth, marketplace, live, admin, health). Generate docs:

```bash
swag init -g cmd/api/main.go -o docs/swagger
```

**Fichier** : `internal/api/routes_core.go` — ajouter route Swagger UI :

```go
import ginSwagger "github.com/swaggo/gin-swagger"
import swaggerFiles "github.com/swaggo/files"

router.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerFiles.Handler))
```

**Commit** : `feat(api): OpenAPI/Swagger annotations and Swagger UI endpoint`

---

## Step 6 : API keys (DEV1-03 to DEV1-05)

**Fichier** : `migrations/124_api_keys.sql` (nouveau)

```sql
CREATE TABLE IF NOT EXISTS api_keys (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    key_hash VARCHAR(64) NOT NULL,
    name VARCHAR(100) NOT NULL,
    permissions JSONB DEFAULT '["read"]',
    last_used_at TIMESTAMPTZ,
    expires_at TIMESTAMPTZ,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);
CREATE UNIQUE INDEX idx_api_keys_hash ON api_keys(key_hash);
```

**Fichier** : `internal/handlers/developer_handler.go` — CRUD API keys (hash with SHA-256, return raw key only on create)

**Fichier** : `internal/middleware/auth.go` — ajouter support `X-API-Key` header comme alternative au Bearer token

**Commit** : `feat(developer): API key management with CRUD and X-API-Key auth`

---

## Step 7 : Admin — moderation, maintenance, announcements, feature flags (ADM1)

**Fichier** : `migrations/125_reports_announcements.sql` (nouveau)

```sql
CREATE TABLE IF NOT EXISTS reports (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    reporter_id UUID NOT NULL REFERENCES users(id),
    reported_user_id UUID REFERENCES users(id),
    content_type VARCHAR(50) NOT NULL,
    content_id UUID,
    reason TEXT NOT NULL,
    status VARCHAR(20) NOT NULL DEFAULT 'pending',
    resolved_by UUID REFERENCES users(id),
    resolved_at TIMESTAMPTZ,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS announcements (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    title VARCHAR(200) NOT NULL,
    content TEXT NOT NULL,
    type VARCHAR(20) NOT NULL DEFAULT 'info',
    is_active BOOLEAN NOT NULL DEFAULT true,
    starts_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    ends_at TIMESTAMPTZ,
    created_by UUID REFERENCES users(id),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS feature_flags (
    name VARCHAR(100) PRIMARY KEY,
    enabled BOOLEAN NOT NULL DEFAULT false,
    description TEXT,
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);
```

**Fichier** : `internal/middleware/maintenance.go` (nouveau) — si `MAINTENANCE_MODE=true`, retourne 503 sauf /health et /admin

**Fichier** : `internal/handlers/admin_handler.go` — ajouter :
- `GET /admin/reports`, `POST /admin/reports/:id/resolve`
- `POST /admin/announcements`, `GET /announcements/active`
- `GET /admin/feature-flags`, `PUT /admin/feature-flags/:name`

**Commit** : `feat(admin): moderation queue, maintenance mode, announcements, feature flags`

---

## Step 8 : Frontend admin + developer (ADM1-06, DEV1-06, DEV1-07, SEC2-07)

**Frontend pages** :
- `ModerationQueueView` — table signalements avec actions (dismiss, warn, ban)
- `AuditLogsView` — table audit logs avec filtres
- `AnnouncementsView` — CRUD annonces, preview
- `FeatureFlagsView` — table avec toggles
- Developer dashboard enrichi — gestion API keys, lien Swagger
- Settings — page "Delete Account" avec confirmation double

**Commit** : `feat(ui): admin moderation, audit logs, announcements, feature flags, delete account`

---

## Step 9 : MSW handlers + Tests

**MSW** : handlers pour admin reports, audit logs, announcements, feature flags, API keys, Swagger mock
**Tests** : security headers verification, audit log creation, account deletion cascade, API key auth, moderation CRUD

**Commit** : `test(security,admin): unit tests for headers, audit, moderation, API keys`

---

## Step 10 : Documentation + release

**Commit** : `docs: update documentation for v0.803`

---

## Step 11 : Rétrospective + archivage + tag

```bash
git tag v0.803
```

---

## Validation finale

```bash
cd veza-backend-api && go build ./... && go test ./... -v
cd apps/web && npm run build
# Verify: curl -I http://localhost:8080/api/v1/health | grep -i "content-security-policy"
# Verify: http://localhost:8080/swagger/index.html loads
git tag v0.803
```