prisme-flow/nodes/bridge/firebase/firebase-getit.js

prisme platform flow engine

/**
 * Created by prisme.io on 09/06/2017.
 */

module.exports = function (RED) {
  var firebase = require('firebase')
  var Utils = require('./utils/utils')

  function FirebaseGetIt (n) {
    RED.nodes.createNode(this, n)
    this.firebaseConfig = RED.nodes.getNode(n.firebaseConfig)
    this.childpath = n.childpath
    this.eventType = n.eventType
    this.activeRequests = []
    this.ready = false
    var node = this

    if (!this.firebaseConfig) {
      this.status({ fill: 'red', shape: 'ring', text: 'invalid credentials' })
      this.error('You need to setup Firebase credentials!')
      return
    }

    this.status({ fill: 'green', shape: 'ring', text: 'Connected' })
    this.on('input', function (msg) {
      if (this.firebaseConfig.fbConfig.fbApp) {
        firebase.database().ref(this.childpath).once(this.eventType.toString()).then(function (snapshot) {
          var msg = {}
          msg.payload = snapshot.val()
          node.send(msg)
          node.status({ fill: 'green', shape: 'ring', text: 'Received Data(Once) at ' + Utils.getTime() })
        })
      }
    })

    this.validEventTypes = {
      'value': true,
      'child_added': true,
      'child_changed': true,
      'chiled_removed': true,
      'child_moved': true
    }
  }
  RED.nodes.registerType('firebase-getit', FirebaseGetIt)
}