cim_summary/.planning/milestones/v1.0-phases/03-api-layer/03-01-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
03-api-layer	01	api	express firebase-auth typescript postgres admin-routes	phase provides 02-backend-services HealthCheckModel.findLatestByService, AlertEventModel.findActive/acknowledge, document_processing_events table phase provides 01-data-foundation service_health_checks, alert_events, document_processing_events tables and models	requireAdminEmail middleware (404 for non-admin, next() for admin) getAnalyticsSummary() aggregate query function with configurable time range GET /admin/health — latest health check for all four monitored services GET /admin/analytics — processing summary with uploads/success/failure/avg-time GET /admin/alerts — active alert events POST /admin/alerts/:id/acknowledge — mark alert acknowledged	04-frontend consumes all four admin endpoints for admin dashboard	added patterns Admin routes use router-level middleware chain (addCorrelationId + verifyFirebaseToken + requireAdminEmail) requireAdminEmail reads env vars inside function body (Firebase Secrets timing) Fail-closed pattern if no admin email configured, deny all with logged warning getPostgresPool() for aggregate SQL (Supabase JS client does not support COUNT/AVG) PostgreSQL parameterized interval with $1::interval explicit cast Response envelope { success, data, correlationId } on all admin endpoints	created modified backend/src/middleware/requireAdmin.ts backend/src/routes/admin.ts backend/src/services/analyticsService.ts backend/src/index.ts	requireAdminEmail returns 404 (not 403) for non-admin users — does not reveal admin routes exist Env vars read inside function body, not module level — Firebase Secrets not available at module load time getPostgresPool() used for aggregate SQL (COUNT/AVG) — Supabase JS client does not support these operations Service names in health endpoint hardcoded to match healthProbeService: document_ai, llm_api, supabase, firebase_auth	Admin auth chain: addCorrelationId → verifyFirebaseToken → requireAdminEmail (router-level, applied once) Admin 404 pattern: non-admin users and unconfigured admin get 404 to obscure admin surface	INFR-02 HLTH-01 ANLY-02	8min	2026-02-24

Phase 3 Plan 01: Admin API Endpoints Summary

Four Firebase-auth-protected admin endpoints exposing health status, alert management, and processing analytics via requireAdminEmail middleware returning 404 for non-admin

Performance

• Duration: 8 min
• Started: 2026-02-24T05:03:00Z
• Completed: 2026-02-24T05:11:00Z
• Tasks: 2
• Files modified: 4

Accomplishments

• requireAdminEmail middleware correctly fails closed (404) for non-admin users and unconfigured environments
• getAnalyticsSummary() uses getPostgresPool() for aggregate SQL with parameterized interval cast
• All four admin endpoints mounted at /admin with router-level auth chain
• TypeScript compiles without errors across the entire backend

Task Commits

Each task was committed atomically:

1. Task 1: Create requireAdmin middleware and getAnalyticsSummary function - 301d0bf (feat)
2. Task 2: Create admin routes and mount in Express app - 4169a37 (feat)

Plan metadata: (docs commit pending)

Files Created/Modified

• backend/src/middleware/requireAdmin.ts - Admin email check middleware returning 404 for non-admin
• backend/src/routes/admin.ts - Admin router with health, analytics, alerts endpoints (4 handlers)
• backend/src/services/analyticsService.ts - Added AnalyticsSummary interface and getAnalyticsSummary()
• backend/src/index.ts - Added adminRoutes import and app.use('/admin', adminRoutes) mount

Decisions Made

• requireAdminEmail returns 404 (not 403) — per locked decision, do not reveal admin routes exist
• Env vars read inside function body, not at module level — Firebase Secrets timing constraint (matches alertService.ts pattern)
• getPostgresPool() for aggregate SQL because Supabase JS client does not support COUNT/AVG filters
• Service names ['document_ai', 'llm_api', 'supabase', 'firebase_auth'] hardcoded to match healthProbeService output exactly

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

None.

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• All four admin endpoints are ready for Phase 4 (frontend) consumption
• Admin dashboard can call GET /admin/health, GET /admin/analytics, GET /admin/alerts, POST /admin/alerts/:id/acknowledge
• No blockers — TypeScript clean, response envelopes consistent with codebase patterns

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Phase: 03-api-layer Completed: 2026-02-24