Web API Common Outlook | CLA AutoExtract

Project Overview

This document breaks down the comprehensive implementation of the Exchange/Outlook monitoring API into manageable stages. The project involves restructuring the current codebase to follow modern Fastify plugin architecture patterns, implementing all Exchange API endpoints, and establishing CI/CD pipelines.

Stage 1: Architecture & Project Structure Refactoring

Priority: HIGH

Estimated Effort: 2-3 days

Tasks:

1.1 - Restructure project to match target topology (features-based)
1.2 - Create directory structure for versioned API endpoints (v1, v2)
1.3 - Migrate existing /src/api/exchange to /src/features/exchange/v1
1.4 - Update imports and module resolution paths
1.5 - Create plugin-based architecture for feature registration
1.6 - Update main app.ts to use new plugin structure
1.7 - Document architectural decisions in ADR format

Dependencies: None

Deliverables:

Restructured codebase matching target topology
Updated app.ts bootstrap file
Architecture Decision Record (ADR) document

Stage 2: Exchange API Core Features Implementation

Priority: HIGH

Estimated Effort: 3-4 days

Tasks:

2.1 - Implement OAuth Authorization endpoints (GET /auth, GET /auth/callback)
2.2 - Implement Webhook endpoint (POST /webhook/inbox)
2.3 - Implement Inbox Management endpoints (GET /list_inboxes, DELETE /unsubscribe/inbox/:id)
2.4 - Implement Blocked Senders endpoints (GET, POST, DELETE /blocked_senders)
2.5 - Implement Exchange Options endpoints (GET, POST /exchange_options)
2.6 - Implement proper error handling and logging
2.7 - Add request validation middleware

Dependencies: Stage 1 complete

Deliverables:

All Exchange API endpoints functional
Type-safe schemas and DTOs
Error handling middleware

Stage 3: Service Layer & Business Logic

Priority: HIGH

Estimated Effort: 2-3 days

Tasks:

3.1 - Create Exchange service class for business logic
3.2 - Implement token encryption/decryption utilities
3.3 - Implement token refresh logic
3.4 - Implement Microsoft Graph API integration
3.5 - Create subscription management service
3.6 - Implement blocked senders validation logic
3.7 - Create email processing service
3.8 - Add comprehensive logging throughout services

Dependencies: Stage 2 complete

Deliverables:

Reusable service layer
Utility functions for token management
Graph API integration modules

Stage 4: Database Layer & Migrations(COMPLETED)

Priority: HIGH

Estimated Effort: 2 days

Tasks:

4.1 - Create database migration scripts for all tables
4.2 - Create exchange_inbox_subscriptions table schema
4.3 - Create exchange_inbox_tokens table schema
4.4 - Create exchange_blocked_senders table schema
4.5 - Create indexes for optimal query performance
4.6 - Implement database repository pattern
4.7 - Add transaction support for critical operations
4.8 - Document database schema in ERD format

Dependencies: Stage 3 in complete

Deliverables:

Migration scripts
Database schema documentation
Repository layer implementation

Stage 5: Testing Infrastructure & Unit Tests

Priority: MEDIUM

Estimated Effort: 3-4 days

Tasks:

5.1 - Set up Vitest testing framework configuration
5.2 - Create test setup and teardown utilities
5.3 - Write unit tests for Exchange controllers (target: 80%+ coverage)
5.4 - Write unit tests for Exchange services (target: 90%+ coverage)
5.5 - Write unit tests for validation schemas
5.6 - Create mock data fixtures
5.7 - Write integration tests for database layer
5.8 - Write API endpoint integration tests
5.9 - Set up code coverage reporting
5.10 - Document testing strategy and patterns

Dependencies: Stages 2, 3, 4 complete

Deliverables:

Comprehensive test suite
Coverage reports
Testing documentation

Stage 6: OpenAPI Specification & Documentation

Priority: MEDIUM

Estimated Effort: 1-2 days

Tasks:

6.1 - Create comprehensive OpenAPI 3.1 specification
6.2 - Document all Exchange API endpoints
6.3 - Add request/response examples
6.4 - Document authentication requirements
6.5 - Add error response documentation
6.6 - Generate Postman collection from OpenAPI spec
6.7 - Create Postman environment templates
6.8 - Update Swagger UI configuration

Dependencies: Stage 2 complete

Deliverables:

doc/openapi.yaml specification
postman/collection.json
postman/environment.json
Updated Swagger documentation

Stage 7: Configuration & Environment Management

Priority: MEDIUM

Estimated Effort: 1 day

Tasks:

7.1 - Create environment-specific configuration files
7.2 - Implement configuration validation using Zod
7.3 - Document all environment variables
7.4 - Create .env.example template
7.5 - Add secrets management strategy
7.6 - Implement config hot-reloading for development
7.7 - Add configuration health checks

Dependencies: None

Deliverables:

Configuration management system
Environment variable documentation
Example configuration files

Stage 8: CI/CD Pipeline - GitHub Actions

Priority: HIGH

Estimated Effort: 2-3 days

Tasks:

8.1 - Create GitHub Actions workflow for CI (build, lint, test)
8.2 - Set up automated testing on PR
8.3 - Configure code coverage reporting
8.4 - Set up Docker image building
8.5 - Configure container registry push
8.6 - Implement semantic versioning automation
8.7 - Add security scanning (Dependabot, CodeQL)
8.8 - Create release automation workflow
8.9 - Document CI/CD pipeline architecture

Dependencies: Stage 5 complete

Deliverables:

.github/workflows/ci.yml
.github/workflows/release.yml
CI/CD documentation

Stage 9: Helm Charts & Kubernetes Deployment

Priority: HIGH

Estimated Effort: 2-3 days

Tasks:

9.1 - Create Helm chart structure
9.2 - Define deployment manifests
9.3 - Configure service definitions
9.4 - Set up ingress rules
9.5 - Create ConfigMaps and Secrets templates
9.6 - Implement health checks (liveness/readiness probes)
9.7 - Configure resource limits and requests
9.8 - Set up horizontal pod autoscaling
9.9 - Create environment-specific values files (dev, staging, prod)
9.10 - Document Helm deployment process

Dependencies: Stage 8 complete

Deliverables:

Complete Helm charts in /helm directory
Deployment documentation
Environment-specific configurations

Stage 10: CD Pipeline - Deployment Automation

Priority: HIGH

Estimated Effort: 2 days

Tasks:

10.1 - Create GitHub Actions workflow for deployment
10.2 - Implement Helm deployment steps
10.3 - Configure deployment to dev environment (auto-deploy)
10.4 - Configure deployment to staging environment (manual approval)
10.5 - Configure deployment to production environment (manual approval)
10.6 - Implement rollback procedures
10.7 - Add deployment notifications (Slack/Teams)
10.8 - Create deployment runbook

Dependencies: Stage 9 complete

Deliverables:

.github/workflows/deploy.yml
Deployment runbook
Rollback procedures

Stage 11: Monitoring, Logging & Observability

Priority: MEDIUM

Estimated Effort: 2 days

Tasks:

11.1 - Integrate structured logging (Pino)
11.2 - Add request/response logging middleware
11.3 - Implement error tracking (Sentry/similar)
11.4 - Create custom metrics for Prometheus
11.5 - Add distributed tracing support
11.6 - Create Grafana dashboards
11.7 - Set up alerting rules
11.8 - Document observability stack

Dependencies: Stage 2 complete

Deliverables:

Logging infrastructure
Monitoring dashboards
Alert configurations

Stage 12: Security & Compliance

Priority: HIGH

Estimated Effort: 1-2 days

Tasks:

12.1 - Implement rate limiting
12.2 - Add request validation and sanitization
12.3 - Configure CORS properly
12.4 - Implement security headers (Helmet)
12.5 - Add audit logging for sensitive operations
12.6 - Implement token encryption at rest
12.7 - Add RBAC enforcement
12.8 - Conduct security review
12.9 - Document security measures

Dependencies: Stages 2, 3 complete

Deliverables:

Security middleware
Audit logs
Security documentation

Stage 13: Performance Optimization

Priority: LOW

Estimated Effort: 1-2 days

Tasks:

13.1 - Add database query optimization
13.2 - Implement caching strategy (Redis)
13.3 - Add request/response compression
13.4 - Optimize bundle size
13.5 - Implement connection pooling
13.6 - Add performance benchmarks
13.7 - Profile and optimize hot paths

Dependencies: All core stages complete

Deliverables:

Performance improvements
Benchmark reports
Optimization documentation

Stage 14: Developer Experience & Tooling

Priority: MEDIUM

Estimated Effort: 1 day

Tasks:

14.1 - Create VS Code devcontainer configuration
14.2 - Set up local development with Docker Compose
14.3 - Add pre-commit hooks (Husky)
14.4 - Configure lint-staged
14.5 - Create development scripts (seed data, reset db)
14.6 - Write comprehensive README
14.7 - Create contributor guidelines
14.8 - Add code generation templates

Dependencies: None

Deliverables:

Developer setup documentation
Local development environment
Contributor guidelines

Stage 15: Final Integration & Documentation

Priority: HIGH

Estimated Effort: 2 days

Tasks:

15.1 - End-to-end integration testing
15.2 - User acceptance testing (UAT)
15.3 - Create API usage examples
15.4 - Write deployment guide
15.5 - Create troubleshooting guide
15.6 - Finalize all documentation
15.7 - Conduct knowledge transfer sessions
15.8 - Create handover documentation

Dependencies: All stages complete

Deliverables:

Complete documentation package
Deployment guide
Troubleshooting guide
Knowledge transfer materials

Summary

Critical Path:

Stage 1 → Stage 2 → Stage 3 → Stage 4 → Stage 5
Stage 8 → Stage 9 → Stage 10
Stage 15 (Final integration)

Total Estimated Effort:

High Priority: 18-22 days
Medium Priority: 9-11 days
Low Priority: 1-2 days
Total: 28-35 days

Recommended Execution Order:

Sprint 1 (Week 1-2): Stages 1, 2, 3, 4
Sprint 2 (Week 3): Stages 5, 6, 7
Sprint 3 (Week 4): Stages 8, 9, 10
Sprint 4 (Week 5): Stages 11, 12, 14, 15
Sprint 5 (Week 6): Stage 13, buffer for testing and fixes

Next Steps

Review and prioritize this TODO with the team
Start with Stage 1 - Architecture refactoring
Create detailed stories for each stage (next document)
Set up project tracking in Jira/GitHub Projects
Assign resources to each stage

Document Version: 1.0

Last Updated: January 9, 2026

Author: GitHub Copilot