node-red-contrib-motechat/js/js.js

ultranet topic and payload communication

const path = require('path')
const debug = require('../lib/mcClient.js').debug
module.exports = (RED) => {

    function js(config) {
        RED.nodes.createNode(this, config)
        const node = this
        const { path: jsPath } = config
        const correctPath = path.isAbsolute(jsPath) ?
            jsPath : path.resolve(jsPath)

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

            try {
                const exec = require(correctPath)
                if (typeof exec !== 'function') {
                    debug('NOT_FUNCTION')
                    node.error('NOT_FUNCTION')
                    return
                }
                send(exec(msg))
            } catch (err) { node.error('REQUIRE_FAIL', err) } finally {
                if (done) done()
            }
        })
    }
    RED.nodes.registerType("js", js)
}