A simple library to manage tournament brackets (round-robin, single elimination, double elimination).

It contains all the logic needed to manage tournaments.

• BYE supported: only during creation (for seeding and balancing).
• Forfeit supported: only during updates.
• Match supported (locked, waiting, ready, running, completed, archived).
• Multiple stages per tournament.
  • So you can first have a round-robin stage (which will give you a seeding), then an elimination stage.

• This library doesn't come with a GUI to create and update tournaments.
• You can use brackets-viewer.js to display the current state of a stage.
• It is designed to be used with any type of storage (JSON, in-memory, SQL, Redis, and more).
• Some storage implementations are already available (see the documentation).

For more information, see the documentation.

const { JsonDatabase } = require('brackets-json-db');
const { BracketsManager } = require('brackets-manager');

const storage = new JsonDatabase();
const manager = new BracketsManager(storage);

// Create an elimination stage for tournament `3`.
await manager.create.stage({
  tournamentId: 3,
  name: 'Elimination stage',
  type: 'double_elimination',
  seeding: ['Team 1', 'Team 2', 'Team 3', 'Team 4'],
  settings: { grandFinal: 'double' },
});

await manager.update.match({
  id: 0, // First match of winner bracket (round 1)
  opponent1: { score: 16, result: 'win' },
  opponent2: { score: 12 },
});

Rendered with the viewer:

As you can see, the manager is composed of submodules, which themselves have methods:

• create module: manager.create.stage()
• get module: manager.get.seeding(), manager.get.finalStandings(), ...
• update module: manager.update.match(), manager.update.confirmSeeding(), ...
• reset module: manager.reset.seeding(), manager.reset.matchGame(), ...
• delete module: manager.delete.stage()
• find module: manager.find.match(), manager.find.nextMatches(), ...
• storage module: this gives you access to the abstract storage interface. Use it as a last resort.

You can navigate the API documentation here: BracketsManager class documentation

All the helpers defined by the library are available here:

const { helpers } = require('brackets-manager');

This library has been created to be used by the Nantarena.

It has been inspired by:

• Toornament (configuration, API and data format)
• Challonge's bracket generator
• jQuery Bracket (feature examples)