const EventEmitter = require('events');
/**
* Class for Wallboard
* @class plugins/outbound/wallboard
* @namespace plugins/outbound/wallboard
* @memberof plugins/outbound/wallboard
*/
class wallboard extends EventEmitter {
/**
* Constructor
*
* Sets up everything, starts websocket
*/
constructor() {
super();
global.plgManager.logger.info('-------- PLUGIN Wallboard -----------');
this.serviceProcess = null;
this.registerForEvents();
this.serviceProcId = null;
this.loadConfig((success) => {
if (success) {
// set plugin as configured
this.initializePlugin((initsuccess) => {
global.plgManager.logger.debug('PLUGIN | WALLBOARD | initialized Plugin: ' + initsuccess);
if (initsuccess) {
this.isConfigured = true;
this.prepareService();
this.wireServiceCommunication();
this.configService();
this.startService();
}
})
}
})
}
/**
* Registration of Events at the plugin manager (hook in to events provided by the plugin manager)
*/
registerForEvents() {
global.plgManager.logger.info('PLUGIN | WALLBOARD | Registering events');
global.plgManager.on('event_pluginConfig_refreshed', (namespace) => {
if (namespace === 'wallboard') {
// plugins config has changed --> refresh
this.loadConfig((success) => {
if (success) {
global.plgManager.logger.info('PLUGIN | WALLBOARD | successfully reloaded plugin configuration');
this.restartService();
} else {
global.plgManager.logger.error('PLUGIN | WALLBOARD | could not reload plugin config!');
}
});
}
})
}
/**
* Loads configuration for Wallboard Service
* @memberof plugins/outbound/wallboard
*/
loadConfig(callback) {
global.plgManager.loadConfigFromStore('wallboard', (configRows) => {
if (configRows !== null) {
this.config = configRows[0];
this.config = JSON.parse(this.config.configstore);
callback(true);
} else {
callback(false);
}
global.plgManager.logger.info('PLUGIN | WALLBOARD | Configuration loaded from core database');
})
}
/**
* returns config parameter for given fieldname
* @param {string} fieldname
* @memberof plugins/outbound/wallboard
*/
getConfigValue(fieldname) {
var retVal = null;
this.config.fields.forEach((field) => {
if (field.fieldname === fieldname) {
retVal = field.value;
}
});
return retVal;
}
/**
* reconfigures plugin with new config settings
* @param {function} callback success, true or false
* @memberof plugins/outbound/wallboard
*/
initializePlugin(callback) {
// LAU
console.log(this.getConfigValue('subtoken'));
this.katSysConfig = {
masterToken: this.getConfigValue('mastertoken'),
subToken: this.getConfigValue('subtoken'),
pemFile: __dirname + '/uploads/' + this.getConfigValue('pemfile'),
loglevel: 'debug'
}
if ((typeof this.katSysConfig.masterToken !== 'undefined') && (typeof this.katSysConfig.subToken !== 'undefined') && (typeof this.katSysConfig.pemFile !== 'undefined')) {
global.plgManager.logger.info('PLUGIN | WALLBOARD | Properly inititlized settings');
callback(true);
} else {
global.plgManager.logger.error('PLUGIN | WALLBOARD | could not initialize settings');
callback(false);
}
}
/**
* Wires messages from service to event model of plugin
* All Messages in service need to be wired here to be recognised in plugin
* @memberof plugins/outbound/wallboard
*/
wireServiceCommunication() {
this.serviceProcess.on('message', function (msg) {
console.log('-----------> MESSAGE FROM WALLBOARD SERVICE: ' + msg);
var payload = null;
try {
payload = JSON.parse(msg);
} catch (err) {
payload = err.message;
}
/**
* check what payload comes in
*/
if (typeof payload.error != 'undefined') {
// child has sent an error
// try restarting the whole service
global.plgManager.event_new_admin_notification('WALLBOARD Service meldet einen Fehler');
this.restartService();
} else if (typeof payload.logmessage != 'undefined') {
// LOGMESSAGE COMING FROM SERVICE
console.log('PLUGIN | WALLBOARD | SERVICE | ' + payload.logmessage);
global.plgManager.logger.info('PLUGIN | WALLBOARD | SERVICE | ' + payload.logmessage);
} else if (typeof payload.newConnection != 'undefined') {
// NEW CLIENT CONNECTED TO WEBSOCKET
console.log('PLUGIN | WALLBOARD | SERVICE | NEW CLIENT CONNECTION');
global.plgManager.logger.info('PLUGIN | WALLBOARD | SERVICE | NEW CLIENT CONNECTION');
} else if (typeof payload.lostConnection != 'undefined') {
// LOST A CLIENT CONNECTED TO WEBSOCKET
console.log('PLUGIN | WALLBOARD | SERVICE | LOST CLIENT CONNECTION');
global.plgManager.logger.info('PLUGIN | WALLBOARD | SERVICE | LOST CLIENT CONNECTION');
} else {
console.log('PLUGIN | WALLBOARD | SERVICE | UNSOLICITED MESSAGE: ' + msg);
global.plgManager.logger.info('PLUGIN | WALLBOARD | SERVICE | UNSOLICITED MESSAGE: ' + msg);
}
}.bind(this));
}
/**
* Registration of Events at the plugin manager (hook in to events provided by the plugin manager)
*/
registerForEvents() {
global.plgManager.logger.info('PLUGIN | WALLBOARD | Registering events')
global.plgManager.on('event_new_feedback_received', (operationUUID, basedataUUID, stateId) => {
global.plgManager.logger.info('PLUGIN | WALLBOARD | EVENT event_new_feedback_received recieved');
this.informWebSocketAboutNewFeedback();
});
global.plgManager.on('event_new_alarm', (alarmInfo) => {
global.plgManager.logger.info('PLUGIN | WALLBOARD | EVENT event_new_alarm recieved');
this.informWebSocketAboutNewAlarm();
})
}
/**
* Creates the service as a seperate node-process (fork)
* sets the serviceProcId of the forked process
* @memberof plugins/outbound/wallbord
*/
prepareService() {
global.plgManager.logger.info('PLUGIN | WALLBOARD | Starting Service');
const { fork } = require('child_process');
this.serviceProcess = fork(__dirname + '/service.js');
this.serviceProcId = this.serviceProcess.pid;
this.serviceProcess.title = 'ALARMiator Plugin - WALLBOARD Connector';
global.plgManager.logger.info('PLUGIN | WALLBOARD | WebSocket - Service started with pid ' + this.serviceProcId);
this.serviceProcess.on('exit', function (code) {
this.serviceProcess = null;
console.log("WALLBOARD Service EXITED " + code);
});
}
/**
* Sends the service configuration to the process
*/
configService() {
this.serviceProcess.send({ config: this.wallboardConfig });
}
/**
* tells the service to connect
*/
startService() {
this.serviceProcess.send({ start: 1 });
}
/**
* restarts the Plugin Service
*/
restartService() {
global.plgManager.logger.info('PLUGIN | WALLBOARD | restart Service...');
if (this.serviceProcess !== null) {
global.plgManager.logger.info('PLUGIN | WALLBOARD | Killing Service...');
this.serviceProcess.kill("SIGHUP");
}
this.initializePlugin((initsuccess) => {
global.plgManager.logger.debug('PLUGIN | WALLBOARD | initialized Plugin: ' + initsuccess);
if (initsuccess) {
this.isConfigured = true;
this.prepareService();
this.wireServiceCommunication();
this.configService();
this.startService();
}
})
}
/**
* Methods to control wallboard clients
*
* Methods send event to service. WebSocket then loads corresponding data and
* sends this to the clients.
*
* Responsibility for refreshing of needed data is at the websocket implementation.
* The following methods shall only signal the websocket to do something and no payload is transmitted
*
*/
informWebSocketAboutNewAlarm() {
this.serviceProcess.send('{ "event_new_alarm" : 1 }');
}
informWebsocketAboutClosedAlarm() {
this.serviceProcess.send('{"event_closed_alarm" : 1}')
}
informWebSocketAboutNewFeedback() {
this.serviceProcess.send('{ "event_new_feedback" : 1 }');
}
}
module.exports = wallboard;