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API Integration Checklist for Contributors

Pre-Integration

  • Review API Documentation

    • Read openapi.yaml for complete API specification
    • Check API_ENDPOINTS_COMPREHENSIVE.md for detailed endpoint descriptions
    • Review API_QUICK_REFERENCE.md for quick lookups
    • Read API_TESTING_GUIDE.md for testing instructions

  • Setup Development Environment

    • Clone repository: git clone [repo-url]
    • Install dependencies: npm install, pip install -r requirements.txt, mvn install
    • Start services: docker-compose up -d or individual service starts
    • Verify all services are running on correct ports
    • Check health endpoints are accessible

  • Authentication Setup

    • Create test user account via /auth/register
    • Login and save JWT token: /auth/login
    • Store token in environment variable or .env file
    • Test token with a simple API call

During Development

API Integration Workflow

  • Understand the Data Flow

    • Map frontend components to API endpoints
    • Identify request/response data structures
    • Check authentication requirements
    • Plan error handling strategy

  • Test Individual Endpoints

    • Use Postman collection for quick testing
    • Verify request format (body, headers, query params)
    • Check response status codes
    • Validate response payload structure

  • Integration Testing

    • Test complete user workflows
    • Verify data persistence
    • Check authorization/permissions
    • Test error scenarios and edge cases

  • Performance Testing

    • Measure API response times
    • Test with realistic data volumes
    • Check for N+1 query problems
    • Validate pagination implementation

Common Integration Patterns

Pattern 1: List and Detail View

GET /cases                    → List all cases with pagination
GET /cases/{caseId}          → Get specific case
PUT /cases/{caseId}          → Update case
DELETE /cases/{caseId}       → Archive case

Implementation Checklist:

  • Implement pagination (page, size, sort)
  • Add filters (status, court, date range)
  • Handle empty results gracefully
  • Show loading states during fetch
  • Implement error messages

Pattern 2: File Upload and Processing

POST /documents/upload       → Upload file
GET /documents/{documentId}  → Fetch document metadata
POST /documents/{documentId}/analyze → AI analysis
GET /documents/{documentId}/download  → Download file

Implementation Checklist:

  • Validate file type and size before upload
  • Show upload progress
  • Handle upload failures with retry
  • Stream file download for large files
  • Display analysis results
  • Cache analysis results

Pattern 3: Streaming Responses

POST /nlp/analyze           → Start analysis with SSE streaming

Implementation Checklist:

  • Implement EventSource for SSE
  • Handle stream events (progress, result, error)
  • Show real-time progress updates
  • Allow stopping/canceling stream
  • Graceful error handling

Pattern 4: Blockchain Verification

POST /evidence              → Add evidence with blockchain hash
POST /evidence/{id}/verify  → Verify blockchain hash

Implementation Checklist:

  • Display blockchain hash for verification
  • Provide verification status
  • Show immutability guarantee
  • Handle verification failures

Testing Scenarios

Scenario 1: Complete Case Workflow

1. Create case
2. Upload documents
3. Add evidence
4. Generate legal documents
5. Schedule hearings
6. Analyze with legal reasoning
  • Test with valid data
  • Test with invalid data
  • Test with missing fields
  • Test with edge cases
  • Test with concurrent requests

Scenario 2: Authorization & Permissions

- Lawyer creates case
- Judge reviews and assigns
- Police uploads FIR
- Admin monitors
  • Test each role can access allowed endpoints
  • Test each role is denied restricted endpoints
  • Test data isolation (users only see own data)
  • Test admin override capabilities

Scenario 3: Error Handling

- Service unavailable (503)
- Authentication failed (401)
- Not found (404)
- Validation error (400)
- Server error (500)
  • Display user-friendly error messages
  • Implement retry logic for transient failures
  • Log errors for debugging
  • Notify support for critical errors

Code Review Checklist

When reviewing API integration:

  • Authentication

    • Token is properly stored and sent
    • Token refresh is implemented
    • Logout clears token
    • Permission checks are enforced

  • API Calls

    • Using correct HTTP methods
    • Headers are properly set
    • Request/response validation
    • Proper error handling

  • State Management

    • Loading states handled
    • Error states displayed
    • Data cached appropriately
    • No race conditions

  • Performance

    • Pagination implemented
    • Unnecessary requests eliminated
    • Response times acceptable
    • No memory leaks

  • Security

    • No sensitive data in logs
    • No exposed tokens
    • Input validation
    • HTTPS in production

  • Testing

    • Unit tests for API client
    • Integration tests for workflows
    • Error scenario tests
    • Auth tests

Useful Commands

Service Management

# Start all services
docker-compose up -d

# Stop services
docker-compose down

# View logs
docker-compose logs -f [service-name]

# Restart specific service
docker-compose restart [service-name]

# Check service status
docker-compose ps

API Testing

# Login and save token
TOKEN=$(curl -s -X POST http://localhost:8080/auth/login \
  -H "Content-Type: application/json" \
  -d '{"email":"user@example.com","password":"pass"}' | jq -r '.token')

# Test API with token
curl -H "Authorization: Bearer $TOKEN" http://localhost:8080/cases

# Run Postman collection tests
newman run Nyay_Setu_API_Collection.postman_collection.json \
  -e postman_environment.json

Database

# View logs and initial setup
docker-compose logs db

# Access database shell (if PostgreSQL)
docker-compose exec db psql -U [username] -d [database]

Documentation to Update

When integrating a new endpoint or feature:

  • Add endpoint to openapi.yaml
  • Add example to Nyay_Setu_API_Collection.postman_collection.json
  • Update API_ENDPOINTS_COMPREHENSIVE.md with details
  • Add code example to API_TESTING_GUIDE.md
  • Update component/service documentation
  • Add changelog entry to CHANGELOG.md

Testing Tools & Resources

  • Postman: API testing and documentation

    • Import: Nyay_Setu_API_Collection.postman_collection.json
    • Run tests: newman run [collection] -e [environment]

  • cURL: Command-line API testing

    • Simple requests: curl -X GET [url]
    • With headers: curl -H "Authorization: Bearer $TOKEN" [url]

  • VS Code Extensions:

    • Thunder Client (REST client)
    • REST Client (markdown-based)
    • OpenAPI (Swagger) Viewer

  • Online Tools:

Helpful Links

Support & Escalation

Getting Help

  1. Check Documentation First

    • API_TESTING_GUIDE.md
    • API_ENDPOINTS_COMPREHENSIVE.md
    • openapi.yaml

  2. Try Postman Collection

    • Import and run example requests
    • Check response format

  3. Review Service Logs

    • docker-compose logs [service]
    • Check for error messages

  4. Search Issues

  5. Ask in Discussions

    • GitHub Discussions
    • Slack/Chat channel
    • Community forum

  6. Contact Team

    • Email: dev@nyaysetu.in
    • Create GitHub issue with:
      • Problem description
      • Steps to reproduce
      • Expected vs actual behavior
      • Error logs/screenshots

Approval Criteria

Before merging API integration:

  • All endpoints tested (happy path + error cases)
  • Authentication/authorization verified
  • Documentation complete and accurate
  • Code reviewed by maintainer
  • Performance acceptable
  • No security vulnerabilities
  • Tests passing (unit + integration)
  • No breaking changes to existing APIs