development_guide.md

Development Guide

This guide covers development workflows, best practices, and common tasks when working with the PSA platform.

Development Environment Setup

Prerequisites

• Docker Engine 24.0.0+
• Docker Compose v2.20.0+
• Node.js 18+
• Git
• VS Code (recommended)

Initial Setup

1. Clone and setup:

git clone https://github.com/your-org/alga-psa.git
cd alga-psa
cp .env.example .env.development

2. Create development secrets:

mkdir -p secrets
# Create development secrets with dummy values
echo "dev-password" > secrets/db_password_server
echo "dev-password" > secrets/db_password_hocuspocus
# ... create other required secrets
chmod 600 secrets/*

3. Start development environment:

# For Community Edition
docker compose -f docker-compose.base.yaml -f docker-compose.ce.yaml up

# For Enterprise Edition
docker compose -f docker-compose.base.yaml -f docker-compose.ee.yaml up

Development Workflow

1. Code Organization

alga-psa/
├── server/             # Main application server
│   ├── src/           # Source code
│   ├── migrations/    # Database migrations
│   └── tests/         # Test files
├── hocuspocus/        # Real-time collaboration
├── redis/             # Redis configuration
└── setup/             # Setup and initialization

2. Branch Strategy

• main: Production-ready code
• develop: Integration branch
• feature/*: New features
• fix/*: Bug fixes
• release/*: Release preparation

3. Development Cycle

1. Create feature branch:

git checkout -b feature/your-feature

2. Start development environment:

docker compose -f docker-compose.base.yaml -f docker-compose.ce.yaml up

3. Make changes and test
4. Commit changes:

git add .
git commit -m "feat: description"

5. Push and create PR:

git push origin feature/your-feature

Common Development Tasks

Database Migrations

1. Create new migration:

cd server
npm run migrate:make your_migration_name

2. Run migrations:

npm run migrate:latest

3. Rollback:

npm run migrate:rollback

Testing

1. Run all tests:

npm test

2. Run specific tests:

npm test -- path/to/test

3. Watch mode:

npm test -- --watch

Working with Docker

1. Rebuild specific service:

docker compose build server

2. View logs:

docker compose logs -f [service]

3. Restart service:

docker compose restart [service]

4. Clean up:

docker compose down -v

Development Best Practices

1. Code Style

• Follow ESLint configuration
• Use TypeScript for type safety
• Follow existing patterns
• Document complex logic
• Write meaningful commit messages

2. Testing

• Write tests for new features
• Maintain test coverage
• Use meaningful test descriptions
• Test edge cases
• Mock external dependencies

3. Docker

• Keep images minimal
• Use multi-stage builds
• Don't store secrets in images
• Use proper cache busting
• Tag images appropriately

4. Security

• Never commit secrets
• Use environment variables
• Validate user input
• Follow OWASP guidelines
• Regular dependency updates

Debugging

1. Server Debugging

1. Enable debug logs:

docker compose up -f docker-compose.base.yaml -f docker-compose.ce.yaml -e DEBUG=true

2. Use VS Code debugger:
   • Launch configuration provided
   • Breakpoints supported
   • Variable inspection
   • Call stack tracking

2. Database Debugging

1. Connect to database:

docker compose exec postgres psql -U psa_user psa_db

2. View logs:

docker compose logs postgres

3. Event Bus and Redis Debugging

1. Redis CLI:

docker compose exec redis redis-cli

2. Monitor all Redis events:

docker compose exec redis redis-cli monitor

3. Monitor event streams:

# Monitor all events
docker compose exec redis redis-cli psubscribe "alga-psa:event:*"

# Monitor specific event type
docker compose exec redis redis-cli psubscribe "alga-psa:event:TICKET_UPDATED"

4. View event bus subscribers:

docker compose exec redis redis-cli pubsub channels "alga-psa:event:*"

5. Debug event bus configuration:

# Check Redis connection
docker compose exec redis redis-cli ping

# View event bus channels
docker compose exec redis redis-cli pubsub channels

# Check channel subscribers
docker compose exec redis redis-cli pubsub numsub channel_name

Event Bus System

1. Configuration

The event bus system uses Redis for event streaming. Configure through environment variables:

# Redis Configuration
REDIS_URL=redis://localhost:6379
REDIS_PREFIX=alga-psa:
REDIS_EVENT_PREFIX=event:
REDIS_RECONNECT_RETRIES=10
REDIS_RECONNECT_INITIAL_DELAY=100
REDIS_RECONNECT_MAX_DELAY=3000

2. Working with Events

1. Create new event types:

// In server/src/lib/eventBus/events.ts
export const EventTypeEnum = z.enum([
  'YOUR_NEW_EVENT',
  // ... other events
]);

export const YourEventPayloadSchema = BasePayloadSchema.extend({
  // Define your event payload schema
  // BasePayloadSchema already includes tenantId
});

// Add to EventPayloadSchemas
export const EventPayloadSchemas = {
  YOUR_NEW_EVENT: YourEventPayloadSchema,
  // ... other schemas
};

2. Create event subscriber:

// In server/src/lib/eventBus/subscribers/yourSubscriber.ts
import { eventBus } from '../index';
import { YourEvent, EventType } from '../events';

async function handleYourEvent(event: YourEvent): Promise<void> {
  const { tenantId } = event.payload;
  // Handle the event
}

export async function registerYourSubscriber(): Promise<void> {
  await eventBus.subscribe(
    'YOUR_NEW_EVENT',
    handleYourEvent
  );
}

3. Publish events:

import { eventBus } from 'lib/eventBus';

await eventBus.publish({
  eventType: 'YOUR_NEW_EVENT',
  payload: {
    tenantId: 'tenant-id',
    // Your event data
  },
});

3. Testing Events

1. Create event bus mocks:

// In your test file
jest.mock('lib/eventBus', () => ({
  eventBus: {
    publish: jest.fn(),
    subscribe: jest.fn(),
  },
}));

2. Test event publishing:

test('should publish event', async () => {
  const event = {
    eventType: 'YOUR_NEW_EVENT',
    payload: {
      tenantId: 'test-tenant',
      // ... other payload data
    },
  };
  
  await yourFunction();
  
  expect(eventBus.publish).toHaveBeenCalledWith(
    expect.objectContaining(event)
  );
});

3. Test event handling:

test('should handle event', async () => {
  const event = {
    id: 'test-id',
    eventType: 'YOUR_NEW_EVENT',
    timestamp: new Date().toISOString(),
    payload: {
      tenantId: 'test-tenant',
      // ... other payload data
    },
  };
  
  await handleYourEvent(event);
  
  // Assert expected behavior
});

Performance Optimization

1. Database

• Index frequently queried fields
• Optimize complex queries
• Regular VACUUM
• Monitor query performance

2. Application

• Use caching effectively
• Optimize API responses
• Implement pagination
• Profile memory usage

3. Docker

• Optimize image sizes
• Use volume mounts
• Configure resource limits
• Monitor container stats

Troubleshooting

Common Issues

1. Database Connection Issues

   • Check credentials
   • Verify host/port
   • Check network connectivity

2. Redis Connection Issues

   • Verify password
   • Check persistence config
   • Monitor memory usage

3. Build Issues

   • Clear Docker cache
   • Update dependencies
   • Check Dockerfile syntax

Debug Commands

# Check service status
docker compose ps

# View service logs
docker compose logs [service]

# Check network
docker network inspect alga-psa_default

# Container shell access
docker compose exec [service] sh

Development Tools

Recommended VS Code Extensions

• Docker
• ESLint
• Prettier
• TypeScript
• GitLens
• REST Client

Useful Scripts

1. Development setup:

./scripts/dev-setup.sh

2. Test data generation:

./scripts/generate-test-data.sh

3. Dependency updates:

./scripts/update-deps.sh

Additional Resources

• Setup Guide
• Configuration Guide
• API Documentation
• Testing Guide