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A New Chapter for MagicMirror: The Community Takes the Lead
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MMM-MealViewer

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  • H Offline
    htilburgs
    last edited by Dec 13, 2019, 5:43 PM

    @sdetweil , I’ve found them, but I don’t know how to use it in combination with the URL that creates the XML.

    Indeed the last one with no extra libs looks promising. I tried to simply add this in the node_helper.js but getting stuck at how to use it.
    I’ve looked into all the MMM Modules but cannot seem to find an example.

    (still trying to learn JS, but not afraid to ask) ☺

    S 1 Reply Last reply Dec 13, 2019, 5:54 PM Reply Quote 0
    • S Offline
      sdetweil @htilburgs
      last edited by sdetweil Dec 13, 2019, 5:57 PM Dec 13, 2019, 5:54 PM

      @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

      Sam

      How to add modules

      learning how to use browser developers window for css changes

      1 Reply Last reply Reply Quote 0
      • H Offline
        htilburgs
        last edited by Dec 13, 2019, 6:11 PM

        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?

        (still trying to learn JS, but not afraid to ask) ☺

        S 1 Reply Last reply Dec 13, 2019, 6:14 PM Reply Quote 0
        • S Offline
          sdetweil @htilburgs
          last edited by Dec 13, 2019, 6:14 PM

          @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…

          Sam

          How to add modules

          learning how to use browser developers window for css changes

          S 1 Reply Last reply Dec 13, 2019, 6:17 PM Reply Quote 0
          • S Offline
            sdetweil @sdetweil
            last edited by Dec 13, 2019, 6:17 PM

            @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

            Sam

            How to add modules

            learning how to use browser developers window for css changes

            1 Reply Last reply Reply Quote 0
            • H Offline
              htilburgs
              last edited by Dec 13, 2019, 6:38 PM

              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
              

              (still trying to learn JS, but not afraid to ask) ☺

              S 1 Reply Last reply Dec 13, 2019, 6:44 PM Reply Quote 0
              • S Offline
                sdetweil @htilburgs
                last edited by Dec 13, 2019, 6:44 PM

                @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)
                			}
                		});
                	},
                

                Sam

                How to add modules

                learning how to use browser developers window for css changes

                H 1 Reply Last reply Dec 13, 2019, 6:51 PM Reply Quote 0
                • H Offline
                  htilburgs @sdetweil
                  last edited by Dec 13, 2019, 6:51 PM

                  @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?

                  (still trying to learn JS, but not afraid to ask) ☺

                  S 1 Reply Last reply Dec 13, 2019, 7:01 PM Reply Quote 0
                  • S Offline
                    sdetweil @htilburgs
                    last edited by sdetweil Dec 13, 2019, 7:01 PM Dec 13, 2019, 7:01 PM

                    @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)			   
                    			   });		   
                    			}
                    		});
                    	},
                    

                    Sam

                    How to add modules

                    learning how to use browser developers window for css changes

                    H 1 Reply Last reply Dec 13, 2019, 7:09 PM Reply Quote 0
                    • H Offline
                      htilburgs @sdetweil
                      last edited by htilburgs Dec 13, 2019, 7:10 PM Dec 13, 2019, 7:09 PM

                      @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]
                      

                      (still trying to learn JS, but not afraid to ask) ☺

                      S 1 Reply Last reply Dec 13, 2019, 7:11 PM Reply Quote 0
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