read csv-data and put it in an array

Perlchamp

yes, i understood. here’s my perlchamp.js (only socketNitificationReceived)

	// messages received from from your node helper (NOT other modules or the system)
	// payload is a notification dependent data structure, up to you to design between module and node_helper
	socketNotificationReceived: function(notification, payload) {
		Log.log(this.name + " received a socket notification: " + notification + " - Payload: " + payload);
		if(notification === "message_from_helper"){
			this.config.message = payload;
			// tell mirror runtime that our data has changed,
			// we will be called back at GetDom() to provide the updated content
			this.updateDom(1000)
		}

		if(notification === "have data"){

			Log.log(this.name + " received a socket notification: " + notification + " - Payload: " + payload);
			
			var now = moment()
			var active_birthdays={}

			for( var birthday of payload) {
				// get 1st 5 chars of birthdate, thru month
				// we will use this as the key in the hash
				var birth_date = birthday.birth.subString(0,4)
				
				// for debugging only
				Log.log("Tag.Monat :", birth_date)
				
				// get the birthday as a moment in this year, for comparing
				var birth_date_moment = moment(birth_date + now.getYear(),"DD.MMYYYY")

				// u can add days to a moment object and then compare 
				//     if the birthdate is before that date (and after now)
				//     so within the next xx days

				// if the date is the same or later, don't use time of day
				if(birth_date.startOf('day').isSame(now.startOf('day')){

					// birthday is in this month
					// check the hash if we've seen anything for today yet
					// if we haven't see this date yet
					if(active_birthdays[birth_date] == undefined){
           
						//  create the holder for its info (array of 
						//		names) in the hash
						active_birthdays[birth_date] = []
					}
					// save the persons name on the list
					active_birthdays[birth_date].push(birthday.name)
				}
			}
     
			// tell MM to call and get our content
			self.updateDom();
		}     			
},

sdetweil

@Perlchamp very good… now, I didn’t test the code I wrote, so there are a couple errors…

but you should be able to see that code in the developers window, sources tab,
navigate on the left tree, modules, your module_name (which has to be perchamp,
folder, filename and the register at the top) all have to match)

Perlchamp

i can’t find … so everything’s right ?

sdetweil

@Perlchamp you should Screenshot at 2020-05-01 18-12-15.png see an error like this

note that I put part of the module name in the filter field

Perlchamp

ok, thanks

sdetweil

@Perlchamp and if something not spelled right (this image also shows the module tree navigation on the left)

when its used !
Screenshot at 2020-05-01 18-17-05.png

Perlchamp

so, sam, everything is fixed :-)
but now i don’t know how to handle the receiving data. i only need a little entry … don’t know how to handle this object-element. actually nothing is displayed except the header i configured …

sdetweil

@Perlchamp cool, now you’ve collected the data… you should be able to see the results on the exit from the notification handler…

now to tell MM to come get the stuff to display…

thats the self.updateDom() call

hey MM, get my stuff

then MM will call getDom()

I have implemented the module too

getDom: function() {
		var wrapper = document.createElement("div");

		for(var birthday of Object.keys(this.active_birthdays)){
				for(var name of this.active_birthdays[birthday]){
					var m=document.createElement('div')
					m.innerText=birthday + ' '+ name
					wrapper.appendChild(m)
				}
		}

		// pass the created content back to MM to add to DOM.
		return wrapper;
	},

sdetweil

@Perlchamp one thing to watch out for, getDom() will be called immediately, long before you have any data,
but you MUST return something… so an empty div works… (this is where that 'Loading…" message would be presented

Perlchamp

black screen, again. this is my perlchamp.js:

Module.register("perlchamp", {

	defaults: {
		language: "de",
		dimmEntries: true   // true: dims entries and the associated 
							//       symbol when the date has expired.
							// false: delete entries and the associated 
							//        symbol when the date has expired.
	},

	init: function(){
		Log.log(this.name + " is in init!");
	},

	start: function(){
		Log.log("Starting module: " + this.name);

		// Set locale
		moment.locale(config.language);
	},

	loaded: function(callback) {
		Log.log(this.name + " is loaded!");
		callback();
	},

	// return list of other functional scripts to use, if any (like require in node_helper)
	getScripts: function() {
		return	["moment.js"];
	}, 

	// return list of stylesheet files to use if any
	getStyles: function() {
		return 	[this.data.path + "/css/perlchamp.css"];
	},

/*
	// return list of translation files to use, if any
	getTranslations: function() {
		return {
			// sample of list of files to specify here, if no files, do not use this routine, , or return empty list

			// en: "translations/en.json",  (folders and filenames in your module folder)
			// de: "translations/de.json"
		}
	},
*/


	// only called if the module header was configured in module config in config.js
	getHeader: function() {
		return this.data.header;
	},

	// messages received from other modules and the system (NOT from your node helper)
	// payload is a notification dependent data structure
	notificationReceived: function(notification, payload, sender) {
		// once everybody is loaded up
		if(notification==="ALL_MODULES_STARTED"){
			// send our config to our node_helper
			this.sendSocketNotification("CONFIG",this.config);
		}
		if (sender) {
			Log.log(this.name + " received a module notification: " + notification + " from sender: " + sender.name);
		} else {
			Log.log(this.name + " received a system notification: " + notification);
		}
	},

	
	// messages received from from your node helper (NOT other modules or the system)
	// payload is a notification dependent data structure, up to you to design between module and node_helper
	socketNotificationReceived: function(notification, payload) {
/*
		Log.log(this.name + " received a socket notification: " + notification + " - Payload: " + payload);
		if(notification === "message_from_helper"){
			this.config.message = payload;
			// tell mirror runtime that our data has changed,
			// we will be called back at GetDom() to provide the updated content
			this.updateDom(1000);
		}
*/
		if(notification === "have data"){

			Log.log(this.name + " received a socket notification: " + notification + " - Payload: " + payload);
			
			var now = moment();
			var active_birthdays = {};

			for(var birthday of payload) {
				// get 1st 5 chars of birthdate, thru month
				// we will use this as the key in the hash
				var birth_date = birthday.birth.subString(0,4);
				
				// get the birthday as a moment in this year, for comparing
				var birth_date_moment = moment(birth_date + now.getYear(),"DD.MMYYYY");

				// u can add days to a moment object and then compare 
				//     if the birthdate is before that date (and after now)
				//     so within the next xx days

				// if the date is the same or later, don't use time of day
				if(birth_date.startOf('day').isSame(now.startOf('day'))) {

					// birthday is in this month
					// check the hash if we've seen anything for today yet
					// if we haven't see this date yet
					if(active_birthdays[birth_date] == undefined){
           
						//  create the holder for its info (array of 
						//		names) in the hash
						active_birthdays[birth_date] = [];
					}
					// save the persons name on the list
					active_birthdays[birth_date].push(birthday.name);
				}
			}
     
			// tell MM to call and get our content
			self.updateDom();
		}     			
			
/*			
			this.config.message = payload;
			// tell mirror runtime that our data has changed,
			// we will be called back at GetDom() to provide the updated content
			this.updateDom(1000)
			
			// filters the birthdaylist and output only the birthdays
			// of the current month, sorted (ascending) by days in 
			// the following format: 
			// [{ day: "10", name: ["firstname lastname",...] }]

			// set variables
			var today_month = moment().format("MM");
			var today_day_month = moment().format("DD.MM");

			var result = Object.entries(jsonObj
			.filter(({birth}) => birth.split('.')[1] === today_month)
			.reduce((a, {birth, name}) => {
				const day = +birth.split('.')[0];
				a[day] = [...(a[day] || []), name];
				return a
			}, {})
			).map(([day, name]) => ({day, name})).sort((a, b) => +a.day - b.day);
			birthdaysArray = result;
			
			// for debugging only
			//console.log("filtered and sorted: ", birthdaysArray);
*/
			
	},

	// system notification your module is being hidden
	// typically you would stop doing UI updates (getDom/updateDom) if the module is hidden
	suspend: function(){

	},

	// system notification your module is being unhidden/shown
	// typically you would resume doing UI updates (getDom/updateDom) if the module is shown
	resume: function(){

	},

	// this is the major worker of the module, it provides the displayable content for this module
	getDom: function() {
		var wrapper = document.createElement("div");

		for(var birthday of Object.keys(this.active_birthdays)){
			for(var name of this.active_birthdays[birthday]){
				var m = document.createElement('div');
				m.innerText = birthday + ' '+ name;
				wrapper.appendChild(m);
			}
		}

		// pass the created content back to MM to add to DOM.
		return wrapper;
	}
})

this the node_helper.js:

var NodeHelper = require("node_helper");
var moment = require("moment");

// add require of other javascripot components here
// var xxx = require('yyy'); here
const csv = require("csvtojson");
var birthdaysArray = [];

module.exports = NodeHelper.create({

	init(){
		console.log("init module helper perlchamp");
	},

	start() {
		var self = this;
		console.log("Starting module helper: " + this.name);

		// convert the csv-file into a JSON-String
		const csvFilePath = this.path + '/data/birthdays.csv';
		csv()
		.fromFile(csvFilePath)
		.then((jsonObj)=>{      
			birthdaysArray = JSON.stringify(jsonObj);
			
			// for debugging only
			//console.log("birthdaysArray: ", birthdaysArray);
			
			// send data to [modulname].js
			self.sendSocketNotification("have data", jsonObj);
		})		
	},
	
	stop(){
		console.log("Stopping module helper: " + this.name);
	},

	// handle messages from our module// each notification indicates a different messages
	// payload is a data structure that is different per message.. up to you to design this
	socketNotificationReceived(notification, payload) {				
		// if config message from module
		if (notification === "CONFIG") {
			// save payload config info
			this.config = payload;
			// wait 15 seconds, send a message back to module
			setTimeout(()=> { this.sendSocketNotification("message_from_helper"," this is a test_message")}, 15000);
		}
		else if(notification === "????2") {
		}
	},
});

these are the terminal outputs:

dirk@raspberrypi:~/MagicMirror/modules/perlchamp $ npm start

> magicmirror@2.11.0 start /home/dirk/MagicMirror
> DISPLAY="${DISPLAY:=:0}" ./node_modules/.bin/electron js/electron.js

[2020-05-02 02:52:02.407] [LOG]    Starting MagicMirror: v2.11.0
[2020-05-02 02:52:02.414] [LOG]    Loading config ...
[2020-05-02 02:52:02.418] [LOG]    Loading module helpers ...
[2020-05-02 02:52:02.424] [LOG]    Initializing new module helper ...
[2020-05-02 02:52:02.425] [LOG]    Module helper loaded: MMM-Logging
[2020-05-02 02:52:02.579] [LOG]    init module helper perlchamp
[2020-05-02 02:52:02.580] [LOG]    Module helper loaded: perlchamp
[2020-05-02 02:52:02.580] [LOG]    All module helpers loaded.
[2020-05-02 02:52:02.711] [LOG]    Starting server on port 8080 ... 
[2020-05-02 02:52:02.718] [INFO]   You're using a full whitelist configuration to allow for all IPs
[2020-05-02 02:52:02.726] [LOG]    Server started ...
[2020-05-02 02:52:02.727] [LOG]    Connecting socket for: MMM-Logging
[2020-05-02 02:52:02.727] [LOG]    Module helper started for MMM-Logging
[2020-05-02 02:52:02.728] [LOG]    Connecting socket for: perlchamp
[2020-05-02 02:52:02.728] [LOG]    Starting module helper: perlchamp
[2020-05-02 02:52:02.732] [LOG]    Sockets connected & modules started ...
[2020-05-02 02:52:02.829] [LOG]    Launching application.
[2020-05-02 02:52:04.803] [LOG]    Starting module: perlchamp (/home/dirk/MagicMirror/modules/MMM-Logging/node_helper.js:34 Class.socketNotificationReceived)
[2020-05-02 02:52:04.805] [LOG]    All modules started! (/home/dirk/MagicMirror/modules/MMM-Logging/node_helper.js:37 Class.socketNotificationReceived)
[2020-05-02 02:52:04.806] [LOG]     payload: undefined (/home/dirk/MagicMirror/modules/MMM-Logging/node_helper.js:31 Class.socketNotificationReceived)
[2020-05-02 02:52:04.807] [LOG]    perlchamp received a system notification: ALL_MODULES_STARTED (/home/dirk/MagicMirror/modules/MMM-Logging/node_helper.js:34 Class.socketNotificationReceived)
[2020-05-02 02:52:04.810] [ERROR]  {} (/home/dirk/MagicMirror/modules/MMM-Logging/node_helper.js:43 Class.socketNotificationReceived)
[2020-05-02 02:52:04.811] [LOG]    Browser Error: {} (/home/dirk/MagicMirror/modules/MMM-Logging/node_helper.js:46 Class.socketNotificationReceived)
[2020-05-02 02:52:07.185] [LOG]    Shutting down server... (/home/dirk/MagicMirror/js/electron.js:105 App.<anonymous>)
[2020-05-02 02:52:07.188] [LOG]    Stopping module helper: MMM-Logging (/home/dirk/MagicMirror/js/node_helper.js:33 Class.stop)
[2020-05-02 02:52:07.190] [LOG]    Stopping module helper: perlchamp (/home/dirk/MagicMirror/modules/perlchamp/node_helper.js:39 Class.stop)
dirk@raspberrypi:~/MagicMirror/modules/perlchamp $

i didn’t never seen the notification “have data” …