node-red-contrib-motechat/call/call.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
    let isReg = require('../lib/mcClient.js').isRegist
    function call(config) {
        RED.nodes.createNode(this, config)
        let node = this

        node.on('input', (msg, send, done) => {
            send = send || function () { node.send.apply(node, arguments) }

            let [DDN, topic, func, name] = [
                RED.util.evaluateNodeProperty(config.DDN, config.DDNType, node, msg),
                RED.util.evaluateNodeProperty(config.topic, config.topicType, node, msg),
                RED.util.evaluateNodeProperty(config.func, config.funcType, node, msg),
                config.name
            ]

            let { t1, t2 } = msg

            if (!name) {
                debug('name should not be empty !!!')
                return
            }
            if (isReg()){
                caller.call(topic, DDN, func, { t1, t2 }, 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() })
            }
            else{
                send([null, "Motechat hasn't registered!"])
                debug("Motechat hasn't registered!")
            }
        })
    }
    RED.nodes.registerType("call", call)
}