node-red-contrib-motechat/xstorage/cached/cached-storage.js

ultranet topic and payload communication

module.exports = function (RED) {
  "use strict"
  let caller = {
    call: require('../../lib/mcClient.js').call,
  }
  let getDDN = require('../../lib/mcClient.js').getDDN
  let debug = require('../lib/mcClient.js').debug

  function CachedStorage(config) {
    RED.nodes.createNode(this, config)
    var node = this

    node.on('input', (msg, send, done) => {
      try {
        send = send || function () { node.send.apply(node, arguments) }
        let func = config.func
        let name = config.name
        let DDN = "sys/"
        let topic = 'xs://cached';

        if (!name) {
          debug('name should not be empty !!!')
          return
        }

        if (!func) {
          debug('func should not be empty !!!')
          return
        }

        caller.call(topic, DDN, func, msg.payload).then(reply => {
          let newMsg = Object.assign(msg, {
            hostDDN: getDDN(),
            name: name,
            payload: reply
          })

          send([newMsg, null])
        }).catch(err => send([null, err]))
          .finally(() => { if (done) done() })

      } catch (err) {
        send([null, err])
      }

    })

  }

  RED.nodes.registerType("cached-storage", CachedStorage)
}