@autocodingsystems/gateway-client/lib/commands/events.js

Library and commandline utility to control the acs gateway - device drivers for the most common industrial production line devices

var api = require('../api');
var globToRegExp = require('glob-to-regexp');

async function list_command(argv, conf, options) {

    var target = require('../parameters/target')(argv);
    var subscription = require('../parameters/subscription')(argv);
    var tag = require('../parameters/tag')(argv);
    var hideconnection = require('../parameters/hideconnection')(argv);
    var hideerrors = require('../parameters/hideerrors')(argv);

    if (!target.value || !subscription.value) {
        usage();
        return;
    }

    var stop;
    try {
        stop = api(target.value).events(
            [{subscription: subscription.value, tag: tag.value}],
            onConnection,
            onEvents,
            onError
        ).stop;
    } catch (e) {
        throw e;
    }

    process.stdin.pipe(require('split')())
    .on('data', (line) => {
        if (line === 'stop') {
            stop();
            process.exit(0);
        }
    })
    .on('error', () => {
        stop();
        process.exit(1);
    })
    .on('end', () => {
        stop();
        process.exit(0);
    });

    function onConnection(connection) {
        if (!hideconnection.value) {
            console.log(JSON.stringify(Object.assign({}, {msgtype: 'connection'}, connection)));
        }
    }

    function onEvents(event) {
        console.log(JSON.stringify(Object.assign({}, {msgtype: 'event'}, event)));
    }

    function onError(error) {
        if (!hideerrors.value) {
            console.log(JSON.stringify(Object.assign({}, {msgtype: 'error'}, error)));
        }
    }

    function usage() {
        console.log('events: receive events from a gateway: ');
        console.log('   ' + target.description);
        console.log('   ' + subscription.description);
        console.log('   ' + tag.description);
        console.log('   ' + hideconnection.description);
        console.log('   ' + hideerrors.description);
    }
}

module.exports = list_command;