domotz-remote-pawn/src/events/handler/updateModuleInfo.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/>.
 **/

var previousUpdateHash = null;

var updateModuleInfo = function (resourceLocator) {
    var myConsole = resourceLocator.log.decorateLogs();
    var engineRequest = resourceLocator.engineRequest;
    var random = resourceLocator.utils.random;
    var status = resourceLocator.status;
    var modules = resourceLocator.utils.modules;

    switch (status.get()) {
        case status.RESTRICTED: {
            myConsole.warn('Not configured agent');
            break;
        }
        case status.CONFIGURED: {
            modules.getAvailableModules(resourceLocator, function (result) {
                var body = result;

                myConsole.info('Body', JSON.stringify(body));
                var bodyHash = random.md5(JSON.stringify(body));

                if (bodyHash !== previousUpdateHash) {
                    engineRequest
                        .sendWithPromise('/module', 'PUT', body)
                        .then(function () {
                            myConsole.info('Sent modules to engine. Hash: %s', bodyHash);
                            previousUpdateHash = bodyHash;
                        })
                        .catch(function (err) {
                            myConsole.error('Error while uploading results: %s', err.message);
                            previousUpdateHash = null;
                        });
                } else {
                    myConsole.info("Agent modules didn't change, no need to notify engine. Hash: %s", previousUpdateHash);
                }

                // save available modules
                resourceLocator.availableModules = result;
                myConsole.info('Available modules', JSON.stringify(resourceLocator.availableModules));
            });
            break;
        }
        case status.UPDATING: {
            myConsole.warn('Pending update. Stop standard operation');
        }
    }
};

module.exports.handler = updateModuleInfo;