AGE -- Abstract Gamification Engine.

This is a rewrite of (rodw/age)[https://github.com/rodw/age] from coffeescript to TypeScript. Mostly it is the same but with some notable changes:

1. Renamed all methods from snake_case to camelCase
2. Achievement Rules are evaluated on event received rather than on getPlayerAchievments
3. Achieved Achievements are also added to the player.history
4. Transient rules are not yet implemented
5. History entries are objects with a timestamp Date, and Achievements have an achieved Date
6. Methods return values rather than replying on Node style callbacks with errors

Installation

npm install @chromeq/age

Examples

For a detailed example of how to use the AGE framework, visit the base project example docs.

Usage

Clients must:

1. Initialise the GameEngine and register players. Further Docs

import { GameEngine } from '@chromeq/age';

// Create a new instance of the gamification engine
const engine = new GameEngine();

// Register the "player" -- any object that contains at least an `id`
const player = { id: 123 };
engine.addPlayer(player);

2. Define achievement rules which define conditions that players must meet in order to earn the corresponding achievement. Further Docs

const rule = new AchievementRule({
    key: 'SessionCount',
    multiplicity: 1,
    transient: false,
    predicate: (player, engine) => {
        return sessionCount > 3; // Any logic required to evaluate to `boolean`
    },
});

// Add the achievemt rule to the engine -- Can also be defined first and provided to the GameEngine constructor
engine.addAchievementRule(rule);

3. Publish events that represent actions or events that add to a player's event history.

// Add an event that happens -- Also has alias `trigger`, `triggerEvent`, `dispatch` or `dispatchEvent`
engine.addEvent(player, 'SessionCount'); // TODO: Add extra data to the event

4. Subscribe to events or achievements

// Subscribe to `'achievement-achieved'` or `'event-occurred'` -- Also has alias `listen`, `addListner` or `addEventListner`

engine.on('event-occurred', async (player, event) => {
    // Useful to "chain" events and you can call `engine.addEvent` again here
    console.log('EVENT OCCURRED', player, event);
});

engine.on('achievement-achieved', async (player, achievement) => {
    // Congrats 🎉 - Show the appropriate UI or save state
    console.log('ACHIEVEMENT ACHIEVED', player, achievement);
});