read csv-data and put it in an array

[sdetweil]

@Perlchamp the new data matches my new code

[Perlchamp]

thanks, but now i’m a little bit confused, because my master problem will be, to reorg the array, to combine people with the same date of birth in as list in one row with the day of birth. but let me try …

[sdetweil]

@Perlchamp ok, this was just to give you ideas on how to access the data… in a useful way

[Perlchamp]

… and I’m very grateful to you for that. I learn from your messages every time. I think it’s great that there are people like you. that also costs time (apart from health, the most important thing in life). Thanks again for that!

[Perlchamp]

hi sam,
i have a major problem, that i don’t understand. this is my code in 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() {
		console.log("Starting module helper: " + this.name);
		//	console.log("Pfad zur csv-Datei: " + this.path + "/data/birthdays.csv");
		
		const csvFilePath = this.path + '/data/birthdays.csv';
		csv()
		.fromFile(csvFilePath)
		.then((jsonObj)=>{      
			birthdaysArray = JSON.stringify(jsonObj);
			console.log("birthdaysArray: " + birthdaysArray);

			var today_day_month = moment().format("DD.MM");
			var today_month = moment().format("MM");
		})
		
		console.log("birthdaysArray #2: " + birthdaysArray);
		
		// moment.js
		moment.locale(config.language);  // set locale
		console.log("aktuelle Zeit: " + moment().format('Do MMMM YYYY, hh:mm:ss'));
		console.log("aktueller Monat(Zahl): " + moment().format('MM'));
		console.log("aktueller Monat(Text): " + moment().format('MMM'));
		console.log("aktueller Tag(Zahl mit führender Null): " + moment().format('DD'));
		console.log("aktueller Tag(Text): " + moment().format('dddd'));
		console.log("aktueller Tag(Abkürzung): " + moment().format('dd'));
		console.log("aktuelles Jahr(Zahl): " + moment().format('YYYY'));
	},

	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) {
		//	console.log(this.name + " received a socket notification: " + notification + " - Payload: " + payload);
		console.log(this.name + " received a socket notification: " + birthdays);
		// 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") {
		}

	},
});

why returns

console.log("birthdaysArray #2: " + birthdaysArray);

nothing.

many thanks in advance

[Perlchamp]

console.log(this.name + " received a socket notification: " + birthdays);

should be

console.log(this.name + " received a socket notification: " + birthdaysArray);

of course. couldn’t edit it, because of spam-message from board …

[sdetweil]

@Perlchamp said in read csv-data and put it in an array:

> 	const csvFilePath = this.path + '/data/birthdays.csv';
> 		csv()
> 		.fromFile(csvFilePath)
> 		.then((jsonObj)=>{      
> 			birthdaysArray = JSON.stringify(jsonObj);
> 			console.log("birthdaysArray: " + birthdaysArray);
> 
> 			var today_day_month = moment().format("DD.MM");
> 			var today_month = moment().format("MM");
> 		})
> 		
> 		console.log("birthdaysArray #2: " + birthdaysArray);

welcome to programming with a asyncronous libraries

csv().fromFile(csvFilePath) starts a ‘long’ operation,
going out to disk, reading in the data, and converting it to json from spreadsheet… (long is milliseconds)

the processor should not wait, so it does not, and the next instruction AFTER the start of the fromFile()
is console.log("birthdaysArray #2: " + birthdaysArray);

	// moment.js
	moment.locale(config.language);  // set locale
	console.log("aktuelle Zeit: " + moment().format('Do MMMM YYYY, hh:mm:ss'));
	console.log("aktueller Monat(Zahl): " + moment().format('MM'));
	console.log("aktueller Monat(Text): " + moment().format('MMM'));
	console.log("aktueller Tag(Zahl mit führender Null): " + moment().format('DD'));
	console.log("aktueller Tag(Text): " + moment().format('dddd'));
	console.log("aktueller Tag(Abkürzung): " + moment().format('dd'));
	console.log("aktuelles Jahr(Zahl): " + moment().format('YYYY'));

and the start function runs out of things to do and returns back to MM…

sometime later , the fromFile() will complete, and call the .then() routine with the data

(jsonObj)=>{      
			birthdaysArray = JSON.stringify(jsonObj);
			console.log("birthdaysArray: " + birthdaysArray);

			var today_day_month = moment().format("DD.MM");
			var today_month = moment().format("MM");
		}

so, if you need to wait for the data(to prints is content) , then the operations would be inside the .then() handler.

[Perlchamp]

ok, thanks. to move the code is not heavy ;-) … i’ve found a snippte to sort my birthdaysArray, but that doesn’t match :

		const csvFilePath = this.path + '/data/birthdays.csv';
		csv()
		.fromFile(csvFilePath)
		.then((jsonObj)=>{      
			birthdaysArray = JSON.stringify(jsonObj);
			console.log("birthdaysArray: " + birthdaysArray);
			
		var result = Object.entries(birthdaysArray.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)
		console.log("sorted birthdays : " + result);

		var today_day_month = moment().format("DD.MM");
		var today_month = moment().format("MM");
		})

now i’m looking for another one. is the birthdaysArray a json-Array or a javascript-array or … someone told me, it’s an object-Array and that this has nothing to do witch json … but: csvtojson, so …

[Perlchamp]

so i’m bloody happy :

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() {
		console.log("Starting module helper: " + this.name);
		console.log("Pfad zur csv-Datei: ", this.path + "/data/birthdays.csv");
		
		const csvFilePath = this.path + '/data/birthdays.csv';
		csv()
		.fromFile(csvFilePath)
		.then((jsonObj)=>{      
			birthdaysArray = JSON.stringify(jsonObj);
			console.log("birthdaysArray: ", birthdaysArray);
			
		var result = Object.entries(jsonObj.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)
		console.log("sorted birthdays : ", result);

		var today_day_month = moment().format("DD.MM");
		var today_month = moment().format("MM");
		})
		
	},

	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) {
		//	console.log(this.name + " received a socket notification: " + notification + " - Payload: " + payload);
		console.log(this.name + " received a socket notification: " + birthdaysArray);
		// 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") {
		}

	},
});

so now I just have to manage to filter out the people from the complete csv-file who have their birthday in the current month …

[Perlchamp]

if i run :

		for(var birthday of birthdaysArray) {
			if(birthday.birth.startsWith(today_day_month)) {
				// this birthday is for today
				console.log(" birthday on "+ today_day_month+" is for "+birthday.name);
			} 
		}

than i get the following error-messages:

 Unhandled rejection TypeError: Cannot read property 'startsWith' of undefined
    at /home/dirk/MagicMirror/modules/perlchamp/node_helper.js:33:22
    at Object.onfulfilled (/home/dirk/MagicMirror/node_modules/csvtojson/v2/Converter.js:112:33)
    at Result.endProcess (/home/dirk/MagicMirror/node_modules/csvtojson/v2/Result.js:83:50)
    at Converter.processEnd (/home/dirk/MagicMirror/node_modules/csvtojson/v2/Converter.js:179:21)
    at /home/dirk/MagicMirror/node_modules/csvtojson/v2/Converter.js:172:19
    at tryCatcher (/home/dirk/MagicMirror/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/home/dirk/MagicMirror/node_modules/bluebird/js/release/promise.js:547:31)
    at Promise._settlePromise (/home/dirk/MagicMirror/node_modules/bluebird/js/release/promise.js:604:18)
    at Promise._settlePromise0 (/home/dirk/MagicMirror/node_modules/bluebird/js/release/promise.js:649:10)
    at Promise._settlePromises (/home/dirk/MagicMirror/node_modules/bluebird/js/release/promise.js:729:18)
    at _drainQueueStep (/home/dirk/MagicMirror/node_modules/bluebird/js/release/async.js:93:12)
    at _drainQueue (/home/dirk/MagicMirror/node_modules/bluebird/js/release/async.js:86:9)
    at Async._drainQueues (/home/dirk/MagicMirror/node_modules/bluebird/js/release/async.js:102:5)
    at Immediate.Async.drainQueues [as _onImmediate] (/home/dirk/MagicMirror/node_modules/bluebird/js/release/async.js:15:14)
    at processImmediate (internal/timers.js:439:21)

I was probably happy too early ;-( … shit happens.