domotz-remote-pawn/src/events/handler/updatePkgInfo.js

Domotz Agent

/** This file is part of Domotz Agent.
  * Copyright (C) 2016  Domotz Ltd
  *
  * Domotz Agent is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
  *
  * Domotz Agent is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Domotz Agent.  If not, see <http://www.gnu.org/licenses/>.
  **/
/**
 * Created by Tommaso Latini <tommaso@domotz.com> on 18/09/15.
 */

var LOG_EVENT = 'HANDLER - (updatePkgInfo)';
var previousIp = null,
    previousPort = null,
    agentDeleted = false,
    previousPkgVersion = null,
    previousAgentVersion = null;

var updatePkgInfo = function (resourceLocator) {

    var engineRequest      = resourceLocator.engineRequest;
    var pkgJson            = resourceLocator.pkg.json;
    var webapp             = resourceLocator.webapp;
    var status             = resourceLocator.status;
    var notConfiguredAgent = resourceLocator.entities.notConfiguredAgent;
    var host               = resourceLocator.discovery.host;

    switch (status.get()) {
        case (status.RESTRICTED):  {
            var ip = host.getIP();
            var port = webapp.get('port');
            if (ip === previousIp && port === previousPort) {
                console.info("%s: Private IP [%s] and port [%s] didn't change." +
                    " No need to notify engine", LOG_EVENT, ip, port);
                return;
            }

            notConfiguredAgent.create()
                .then(function(location) {
                    console.info('%s: Location for not-configured-agent: %s', LOG_EVENT, location);
                })
                .then(function () {
                    return notConfiguredAgent.update(ip, port);
                })
                .then(function() {
                    console.info("%s: Update private IP [%s] and port [%s]",
                        LOG_EVENT, ip, port);
                    previousIp = ip;
                    previousPort = port;
                });
            break;
        }
        case (status.CONFIGURED): {
            var pkgVersion         = process.env.DVERSION;
            var agentVersion       = pkgJson.version;
            if (!agentDeleted) {
                notConfiguredAgent.delete()
                    .then(function () {
                        agentDeleted = true;
                        console.info("%s: Delete Unconfigured Agent.", LOG_EVENT);
                    });
            } else {
                console.info("%s: Agent already deleted.", LOG_EVENT);
            }

            if (previousAgentVersion !== agentVersion || previousPkgVersion !== pkgVersion) {
                engineRequest.send('', 'PUT', {version: {package: pkgVersion, agent: agentVersion}},
                    function () {
                        console.info('%s: Sent package info: Agent Version [%s], ' +
                            'Package Version [%s]', LOG_EVENT, agentVersion, pkgVersion);
                        previousAgentVersion = agentVersion;
                        previousPkgVersion = pkgVersion;
                    }
                );
            } else {
                console.info("%s: Agent Version [%s] and Package Version [%s]" +
                    " didn't change. No need to notify engine", LOG_EVENT, agentVersion, pkgVersion);
            }
            break;
        }
        case (status.UPDATING): {
            console.warn('%s: Pending update. Stop standard operation', LOG_EVENT);
        }
    }
};

module.exports.handler = updatePkgInfo;