MMM-MealViewer

sdetweil

@htilburgs the url bring back the data with request

request(url, function(err, res, body) {
    // if no error and server was happy
    if(err == null && res.statusCode ==200){
    console.log(body);
    var json_data=this.xmlToJson(body)
    console.log("Speed[0] text is "+json_data.SD[0].SPEED.@attributes.TEXT)
}
});

when the server responds, the function is called and passed the data, body)
and then u would convert it from xml to json . using the last code

var json_data=this.xmlToJson(body)

then the json is accessed with the normal structure notation
(using the sample with the code in the last link)

json_data.SD[0].SPEED.@attributes.TEXT will be ‘1421’

SD is an array (multiple of same xml tags)

a little ugly in the data layour, could get rid of the @attributes thing with a small code change

htilburgs

So in my case the URL produces:

0_1576260496007_7fa5a24c-528a-4697-9557-2a9058df2860-image.png image url)

json_data.SD[0].SPEED@attributes.TEXT will be:

json.data.film[0].titel    --> 'Bellicher: Cel'

Correct?

sdetweil

@htilburgs correct (json_data is the name of the output variable, note underscore, not dot, using dot means ‘go into’) … if you use one of the module add ons… not the code shown…

sdetweil

@htilburgs and the number of films in the array would be

json_data.film.length

using the developers window you can put a code stop on the line after the xml2json
and then u can explore the conversion…

you can also use console.log(JSON.stringify(some_object)) and it will dump the structure in json format

htilburgs

Mmmm… not working yet…
My current node_helper.js:

const NodeHelper = require('node_helper');
const request = require('request');

module.exports = NodeHelper.create({

    start: function() {
        console.log("Starting node_helper for: " + this.name);
    },
	
	// Changes XML to JSON
	xmlToJson: function(xml) {
		
		// Create the return object
		var obj = {};

		if (xml.nodeType == 1) { // element
			// do attributes
			if (xml.attributes.length > 0) {
			obj["@attributes"] = {};
				for (var j = 0; j < xml.attributes.length; j++) {
					var attribute = xml.attributes.item(j);
					obj["@attributes"][attribute.nodeName] = attribute.nodeValue;
				}
			}
		} else if (xml.nodeType == 3) { // text
			obj = xml.nodeValue;
		}

		// do children
		if (xml.hasChildNodes()) {
			for(var i = 0; i < xml.childNodes.length; i++) {
				var item = xml.childNodes.item(i);
				var nodeName = item.nodeName;
				if (typeof(obj[nodeName]) == "undefined") {
					obj[nodeName] = xmlToJson(item);
				} else {
					if (typeof(obj[nodeName].push) == "undefined") {
						var old = obj[nodeName];
						obj[nodeName] = [];
						obj[nodeName].push(old);
					}
					obj[nodeName].push(xmlToJson(item));
				}
			}
		}
		return obj;
	},
		
	
	getMTVM: function(url) {
		request(url, function(err, res, body) {
		// if no error and server was happy
			if(err == null && res.statusCode ==200){
			console.log(body);
			var json_data = this.xmlToJson(body)
			console.log("Text is " + json_data.film[0].titel)
			}
		});
	},


    socketNotificationReceived: function(notification, payload) {
        if (notification === 'GET_MTVM') {
            this.getMTVM(payload);
        }
    }
});

In the dev console I get an error:

Whoops! There was an uncaught exception...
TypeError: this.xmlToJson is not a function

sdetweil

@htilburgs ah the fun of ‘this’…

	getMTVM: function(url) {
               let self=this
		request(url, function(err, res, body) {
		        // if no error and server was happy
			if(err == null && res.statusCode ==200){
			   console.log(body);
			   var json_data = self.xmlToJson(body)
			   console.log("Text is " + json_data.film[0].titel)
			}
		});
	},

htilburgs

@sdetweil Yeah! That part is working. Now I’ve an other error which has something to do with the xmlToJson function:

Whoops! There was an uncaught exception...
TypeError: xml.hasChildNodes is not a function

Any idea?

sdetweil

@htilburgs yeh, tricky crap… they had a special runtime that supported that… sorry…
have to use one of the libs…

in your module folder do

npm install xml2js

then in your code

const xml2js = require('xml2js');

then

getMTVM: function(url) {
               let self=this
		request(url, function(err, res, body) {
		        // if no error and server was happy
			if(err == null && res.statusCode ==200){
			   console.log(body);
			   xml2js.parseString(body,function (err,result) {
			       let json_data = result // not needed but may make more clear
			       console.log("Text is " + json_data.film[0].titel)			   
			   });		   
			}
		});
	},

htilburgs

@sdetweil Almost there I think ;-)

Whoops! There was an uncaught exception...
TypeError: Cannot read property '0' of undefined
    at /home/pi/MagicMirror/modules/MMM-MyTVMovies/node_helper.js:28:47
    at Parser.<anonymous> (/home/pi/MagicMirror/modules/MMM-MyTVMovies/node_modules/xml2js/lib/parser.js:306:18)
    at Parser.emit (events.js:182:13)
    at SAXParser.onclosetag (/home/pi/MagicMirror/modules/MMM-MyTVMovies/node_modules/xml2js/lib/parser.js:264:26)
    at emit (/home/pi/MagicMirror/modules/MMM-MyTVMovies/node_modules/sax/lib/sax.js:624:35)
    at emitNode (/home/pi/MagicMirror/modules/MMM-MyTVMovies/node_modules/sax/lib/sax.js:629:5)
    at closeTag (/home/pi/MagicMirror/modules/MMM-MyTVMovies/node_modules/sax/lib/sax.js:889:7)
    at SAXParser.write (/home/pi/MagicMirror/modules/MMM-MyTVMovies/node_modules/sax/lib/sax.js:1436:13)
    at Parser.exports.Parser.Parser.parseString (/home/pi/MagicMirror/modules/MMM-MyTVMovies/node_modules/xml2js/lib/parser.js:325:31)
    at Parser.parseString (/home/pi/MagicMirror/modules/MMM-MyTVMovies/node_modules/xml2js/lib/parser.js:5:59)

Has this something to do with the json_data.film[0].titel ??
Or is it something else?

When I remove .film[0].titel I got:

Text is [object Object]
200[object Object]

sdetweil

@htilburgs u should look at the data format

getMTVM: function(url) {
               let self=this
		request(url, function(err, res, body) {
		        // if no error and server was happy
			if(err == null && res.statusCode ==200){
			   console.log(body);
			   xml2js.parseString(body,function (err,result) {
			       let json_data = result // not needed but may make more clear
			       console.log(JSON.stringify(json_data))			   
			   });		   
			}
		});
	},