git ssb

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var LazyWatcher = require('./lib/lazy-watcher')
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var watchThrottle = require('./watch-throttle')
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var resolve = require('./resolve')
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module.exports = function Throttle (input, minDelay) {
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  // default delay is 20 ms
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  minDelay = minDelay || 20
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  var binder = LazyWatcher(update, listen, unlisten)
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  binder.value = resolve(input)
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  var releases = []
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  var result = function MutantThrottle (listener) {
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    if (!listener) {
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      return binder.getValue()
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    }
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    return binder.addListener(listener)
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  }
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  function update () {
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    binder.value = resolve(input)
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    return true
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  }
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  function listen () {
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    releases.push(watchThrottle(input, minDelay, binder.onUpdate))
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  }
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  function unlisten () {
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    while (releases.length) {
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      releases.pop()()
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    }
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  }
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  return result
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}
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