git ssb

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var addCollectionMethods = require('./lib/add-collection-methods')
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var computed = require('./computed')
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var KeyValue = require('./lib/key-value')
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var resolve = require('./resolve')
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var isObservable = require('./is-observable')
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module.exports = function DictToCollection (obs) {
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  var value = []
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  var raw = []
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  var instance = computed.extended(obs, function () {
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    var keys = getKeys(obs)
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    var length = keys.length
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    for (var i = 0; i < length; i++) {
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      var key = keys[i]
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      var item = obs.get(key)
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      if (shouldUpdate(item, raw[i])) {
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        if (raw[i].key() !== key) {
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          raw[i].key.set(key)
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        }
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        if (raw[i].value !== item) {
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          raw[i].value.set(item)
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        }
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      } else {
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        raw[i] = KeyValue(key, item)
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      }
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      value[i] = resolve(raw[i])
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    }
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    raw.length = value.length = length
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    return value
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  })
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  var result = function MutantDictToCollection (listener) {
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    return instance(listener)
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  }
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  // getLength, get, indexOf, etc
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  addCollectionMethods(result, raw, instance.checkUpdated)
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  return result
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}
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function shouldUpdate (newItem, keyValue) {
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  if (!keyValue) {
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    return false
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  } else if (isObservable(newItem) && keyValue.value === newItem) {
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    return true
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  } else {
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    return !keyValue.isBound
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  }
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}
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function getKeys (value) {
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  if (isObservable(value) && value.keys) {
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    return resolve(value.keys)
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  } else {
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    return Object.keys(resolve(value))
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  }
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}
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