observ-node-array/resolved-value.js

Populate an observable array from node descriptors.

var Observ = require('@mmckegg/mutant/value')
var watch = require('@mmckegg/mutant/watch')

module.exports = ResolvedValue

function ResolvedValue (node) {
  var obs = Observ()
  var release = null

  node.onNode(function (node) {
    release && release()
    release = null
    if (node && typeof node.resolved === 'function') {
      release = watch(node.resolved, obs.set)
    } else {
      obs.set(null)
    }
  })

  return obs
}