v2.0.0

Version 2

🎯 Major Rewrite: Functional API

v2.0.0 introduces a complete rewrite with a functional API that replaces the previous class-based approach.

✨ New Features

• Simple function calls replace multi-step class setup
• Strong TypeScript typing enforces minimum 2 teams at compile time
• Pure functions for better testing and functional programming patterns
• Multi-team matches with dedicated calculateMultiTeamMatch() function

💥 Breaking Changes

• Classes removed: Duel, FreeForAll, TeamMatch, Player classes → replaced with functions
• API simplified: calculateDuel(), calculateFreeForAll(), calculateTeamMatch()
• Player objects: new Player(id, rating) → { id, rating } plain objects
• Team scoring: rank parameter → score parameter (higher score = better performance)
• Expected score: player.expectedScoreAgainst() → calculateExpectedScore() function

📦 Migration

See MIGRATION_v2.md for detailed migration examples.

Before (v1):

const match = new Duel();
match.addPlayer(new Player("p1", 1200), true);
match.addPlayer(new Player("p2", 1320), false);
const results = match.calculate();

After (v2):

const results = calculateDuel(
  { id: "p1", rating: 1200 }, // winner
  { id: "p2", rating: 1320 }  // loser
);

Full Changelog: v1...v2.0.0