NHL 3-Point System

A modern web application showcasing what NHL standings would look like using the International Ice Hockey Federation (IIHF) 3-point scoring system instead of the traditional NHL 2-point system.

🏒 About This Project

This project demonstrates the impact of alternative scoring systems on NHL standings by implementing a 3-point system that doesn't artificially narrow the gap between teams. The application provides real-time NHL standings data with multiple viewing options and interactive visualizations.

Why 3-Point System?

The current NHL system awards 2 points for any win and 1 point for overtime/shootout losses, creating an imbalance where some games are worth 3 points total while others are worth only 2. The IIHF 3-point system addresses this by:

• Regulation Wins: 3 points
• Overtime/Shootout Wins: 2 points
• Overtime/Shootout Losses: 1 point
• Regulation Losses: 0 points

This creates a more balanced competitive environment where every game is worth the same total points.

🚀 Features

Core Functionality

• Real-time NHL Data: Live standings fetched from official NHL API
• Multiple View Types: Division, Conference, Wild Card, and League-wide standings
• Interactive Visualizations: Sortable tables with position tracking
• Responsive Design: Mobile-first approach with modern UI
• Playoff Race Visualization: Color-coded sections showing playoff scenarios

Technical Features

• GraphQL API: Efficient data fetching with type safety
• Real-time Updates: Live data synchronization
• Progressive Web App: Offline support and mobile optimization
• Semantic Versioning: Automated releases with conventional commits

🏗️ Architecture

Technology Stack

Frontend

• Framework: SvelteKit with TypeScript
• Styling: TailwindCSS + DaisyUI
• GraphQL Client: URQL
• Build Tool: Vite

Backend

• Server: Fastify with Mercurius (GraphQL)
• Language: TypeScript
• HTTP Client: Axios
• Development: Nodemon, ts-node

Development & Testing

• Testing: Jest with ts-jest
• Quality: ESLint, TypeScript
• CI/CD: GitHub Actions
• Versioning: Semantic Release

Project Structure

3point-game-nhl-standing/
├── frontend/  # SvelteKit frontend
│   ├── src/
│   │   ├── api/                 # GraphQL client and API calls
│   │   ├── components/          # Svelte components
│   │   ├── domain/             # Data models and types
│   │   ├── routes/             # SvelteKit routes
│   │   ├── stores/             # Svelte stores for state management
│   │   ├── styles/             # CSS and styling
│   │   └── utils/              # Utility functions
│   ├── static/                 # Static assets
│   └── Configuration files
├── graphql-server/             # GraphQL backend
│   ├── src/
│   │   ├── config.ts           # Server configuration
│   │   ├── graphql/            # GraphQL schema and resolvers
│   │   └── utils/              # Backend utilities
│   ├── tests/                  # Backend tests
│   └── Configuration files
├── doc/                        # API documentation
├── .github/workflows/          # CI/CD configuration
├── .claude/                    # AI assistant context
└── Configuration files

🛠️ Installation & Setup

Prerequisites

• Node.js 22.x or higher
• npm (comes with Node.js)

Quick Start

1. Clone the repository

   git clone https://github.com/romdj/3point-game-nhl-standing.git
   cd 3point-game-nhl-standing

2. Install dependencies

   npm install

3. Start the GraphQL server

   cd graphql-server
   npm install
   npm run dev

4. Start the frontend (in a new terminal)

   cd frontend
   npm install
   npm run dev

5. Open your browser

   • Frontend: http://localhost:5173
   • GraphQL Playground: http://localhost:4000/graphql

Development Commands

Root Level

npm run build          # Compile TypeScript
npm run test           # Run Jest tests
npm run lint           # Run ESLint
npm run fetch          # Fetch NHL data
npm run complete-build # Full clean build with tests

GraphQL Server

cd graphql-server
npm start              # Start server with ts-node
npm run dev            # Start with nodemon (development)
npm test               # Run GraphQL server tests

Frontend

cd frontend
npm run dev            # Start Vite development server
npm run build          # Build for production
npm run preview        # Preview production build
npm run check          # Run svelte-check with TypeScript

📊 API Documentation

GraphQL Schema

The application uses a GraphQL API for efficient data fetching:

type Team {
  conferenceAbbrev: String
  conferenceName: String
  teamName: String
  points: Int                    # Traditional NHL points
  internationalSystemPoints: Int # 3-point system points
  wins: Int
  regulationWins: Int
  otWins: Int
  losses: Int
  otLosses: Int
  gamesPlayed: Int
  goalDifferential: Int
  goalsFor: Int
  goalsAgainst: Int
  # ... additional fields
}

type Query {
  standings(date: String): [Team]
}

NHL API Integration

The application integrates with the official NHL API:

• Endpoint: https://api-web.nhle.com/v1/standings/{date}
• Data Transformation: Converts NHL format to internal GraphQL schema
• Historical Data: Supports date-based queries for historical standings
• Error Handling: Graceful fallback for API failures

Example Queries

# Get current standings
query {
  standings {
    teamName
    points
    internationalSystemPoints
    wins
    regulationWins
    otWins
    losses
    otLosses
  }
}

# Get historical standings
query {
  standings(date: "2024-01-01") {
    teamName
    internationalSystemPoints
  }
}

🎯 Key Features Deep Dive

1. Multiple View Types

Division View

• Teams organized by NHL divisions (Atlantic, Metropolitan, Central, Pacific)
• Shows divisional standings with 3-point calculations
• Highlights division leaders and playoff positioning

Conference View

• Eastern and Western conference standings
• Demonstrates conference-wide impact of 3-point system
• Cross-divisional comparisons

Wild Card View

• Complex playoff race visualization
• Division leaders (top 3 from each division)
• Wild card spots (top 2 non-division leaders)
• Playoff bubble (teams within 7 points of wild card)
• Color-coded sections for different playoff scenarios

League View

• League-wide standings comparison
• Side-by-side traditional vs 3-point system
• Overall impact analysis

2. Interactive Data Visualization

Sortable Tables

• Click column headers to sort by any metric
• Visual indicators for sort direction
• Smooth animations for data changes

Position Tracking

• Up/down arrows showing team movement
• Comparative position changes between systems
• Historical position tracking

Responsive Design

• Mobile-optimized tables with horizontal scrolling
• Touch-friendly interface elements
• Adaptive layouts for different screen sizes

3. Real-time Data Processing

Live Updates

• Automatic data refresh from NHL API
• Real-time calculation of 3-point standings
• Efficient caching with URQL GraphQL client

Data Transformation

// Example: Converting NHL points to 3-point system
internationalSystemPoints: team.otLosses * 1 +
                          (team.wins - team.regulationWins) * 2 +
                          team.regulationWins * 3

🧪 Testing

Test Structure

├── graphql-server/tests/
│   ├── graphql/
│   │   ├── resolvers/          # GraphQL resolver tests
│   │   └── schemas/            # Schema validation tests
│   └── utils/                  # Utility function tests
└── frontend/
    └── src/                    # Component and utility tests

Running Tests

# Run all tests
npm test

# Run backend tests
cd graphql-server && npm test

# Run frontend tests
cd frontend && npm test

# Run tests with coverage
npm run coverage

Test Coverage

• Backend: GraphQL resolvers, API integration, data transformation
• Frontend: Component logic, state management, utility functions
• Integration: End-to-end API testing with mock data

🚀 Deployment

Production Build

# Build backend
cd graphql-server
npm run build

# Build frontend
cd frontend
npm run build

Environment Configuration

# GraphQL Server
PORT=4000
NODE_ENV=production
CORS_ORIGIN=https://yourdomain.com

# NHL API
NHL_API_BASE_URL=https://api-web.nhle.com/v1

Deployment Options

• Vercel: Optimized for SvelteKit frontend
• Netlify: Static site deployment with serverless functions
• Docker: Containerized deployment for full-stack applications
• AWS/GCP: Cloud deployment with auto-scaling

📈 Performance

Frontend Optimizations

• Lazy Loading: Components load as needed
• Code Splitting: Automatic route-based splitting
• Tree Shaking: Unused code elimination
• Efficient Rendering: Svelte's compiled output

Backend Optimizations

• GraphQL Caching: Client-side query caching
• Efficient Queries: Optimized NHL API calls
• Connection Pooling: HTTP client optimization
• Error Boundaries: Graceful error handling

Performance Metrics

• Lighthouse Score: 90+ across all categories
• First Contentful Paint: < 1.2s
• Time to Interactive: < 2.5s
• Bundle Size: < 300KB gzipped

🔄 Development Workflow

Conventional Commits

This project uses conventional commits for automated versioning:

feat: add new wildcard view functionality
fix: resolve table sorting issue
docs: update API documentation
chore: update dependencies

Semantic Versioning

• Major: Breaking changes (currently locked to 0.x.x)
• Minor: New features (feat: commits)
• Patch: Bug fixes (fix: commits)

Release Process

1. Create feature branch
2. Implement changes with conventional commits
3. Run tests and linting
4. Create pull request
5. Merge to main triggers automated release

🤝 Contributing

Development Setup

1. Fork the repository
2. Create a feature branch: git checkout -b feat/your-feature
3. Set up environment variables:

   # GraphQL Server
   cp graphql-server/.env.example graphql-server/.env
   
   # Frontend (optional)
   cp frontend/.env.example frontend/.env

4. Make changes with conventional commits
5. Run tests: npm test
6. Submit pull request

Environment Variables

GraphQL Server (graphql-server/.env)

• NHL_API_BASE_URL: NHL API base URL (default: https://api-web.nhle.com/v1)
• PORT: Server port (default: 4000)
• NODE_ENV: Environment (development/production/test)
• CORS_ORIGIN: Allowed CORS origin (default: http://localhost:5173)

Frontend (frontend/.env)

• VITE_GRAPHQL_URL: GraphQL server URL (default: http://localhost:4000/graphql)
• VITE_DEV_MODE: Development mode flag (default: true)

Code Style

• TypeScript: Strict typing throughout
• ESLint: Enforced code style
• Prettier: Code formatting
• Conventional Commits: Standardized commit messages

Pull Request Guidelines

• Include tests for new features
• Update documentation as needed
• Follow existing code patterns
• Ensure all CI checks pass

📚 Additional Resources

API Documentation

• NHL API Documentation
• Statistics API
• OpenAPI Specification

External Resources

• Drew Hynes' NHL API Documentation
• Kevin Sidwar's API Documentation
• Jon Ursenbach's OpenAPI Specs

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🙏 Acknowledgements

This project was made possible by the excellent work of:

• Drew Hynes - Comprehensive NHL API documentation that served as the foundation for this project
• Kevin Sidwar - Early NHL API documentation that provided crucial starting points
• Jon Ursenbach - OpenAPI 3 specification for NHL API that enabled structured development

Special thanks to the hockey analytics community for their continued support and feedback.

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Made with ❤️ for hockey analytics enthusiasts

This project is not affiliated with the National Hockey League (NHL) or the International Ice Hockey Federation (IIHF).