swarm-statistics

swarm-statistics

Usage

Statistics tracking

Start by defining the statistics you want to track.

var def = new statistics.Definition()
def.stat('money', 'replace', {'money.max': 'max'})
def.stat('prestigeDurationMillis', 'min')
def.stat('prestigeCount', 'add')
var stats = def.create()

Update statistics when values in your game change.

stats.update('money', 1000)
stats.updates({money: 1000, prestigeDurationMillis: 300000, prestigeCount: 1})
stats.updates({money: 800, prestigeDurationMillis: 1000000, prestigeCount: 1})
stats.get('money')
// => 800
stats.get('money.max')
// => 1000
stats.get('prestigeDurationMillis')
// => 86400
stats.get('prestigeCount')
// => 2

React to each statistic change.

def.listen(function(name, value) {
  console.log('statistic changed: '+name+': '+value);
})

Define thresholds to notify other parts of your app when your statistics reach a certain value. These are useful for achievements, storyline progression, or other kinds of notifications. A threshold will only call its handlers once.

TODO: should this be called on def or stats???

def.threshold('lotsOfMoney', 'money.max', 10000)
def.threshold('lotsOfMoney').handle(function() {
  console.log("yay I'm rich")
})
stats.threshold().handle(function(threshold) {
  console.log("threshold: "+threshold.name)
})

Thresholds can also be inspected manually. percent is between 0 and 1; 1 is completed/100%. A completed threshold will always stay complete.

stats.threshold('lotsOfMoney').isComplete()
// => false
stats.threshold('lotsOfMoney').percent()
// => 0.1

Statistics values are JSON-formatted for easy persistence. Definitions, listeners, and thresholds aren't included, and your code should re-define them on refresh.

var json = JSON.stringify(stats.state))
localStorage.setItem('stats', json)
// ...page reload...
var def = ...
var json = localStorage.getItem('stats')
var stats = def.create(json && JSON.parse(json))

Achievements and triggers

... TODO. implement thresholds/statistics first - building blocks. The goal is to easily define (achievement: set-of-thresholds + outside conditions, like timers/durations/non-indexed statistics (maxiumum duration))

TODO: compound triggers/multi-thresholds. and, or, timer-based...

---- old compound-trigger design below

Fire triggers when your statistics reach certain thresholds. These are useful for achievements, storyline progression, or other notifications. A trigger will only fire once per game session.

stats.trigger('lotsOfMoney').threshold('money.max', 10000)
stats.trigger('fastPrestige').threshold('prestigeDurationMillis', 300000)
stats.trigger('lotsOfPrestiges').threshold('prestigeCount', 10)
stats.trigger('lotsOfMoneyAndPrestiges').threshold({prestigeCount: 10, 'money.max': 10000})
stats.trigger('lotsOfMoneyNoPrestiges').      // TODO how to best do this one?
stats.trigger('lotsOfMoney').handle(function() {
  console.log('yay, I\'m rich');
  // grant an achievement here, for example
})
stats.trigger().handle(function(name) {
  console.log('triggered '+name);
})

Use conditions to prevent a trigger from firing based on some outside condition. // TODO: duration should be a part of this api. Also, outside conditions are ambiguous about "do I get re-fired later?" - remove them, let listener handler it???? // TODO: should compound conditions even be this API's responsibility? The "hard" part is indexing the trigger conditions; listeners can combine them.

stats.trigger('lotsOfMoneyQuickly').threshold('money.max', 10000).condition(function() {
  timeSinceLastPrestige() >= 86400 * 1000;
})