module that displays a certain text from a website, the text on the website is updated daily

[Amoniak]

so, this is what my NodeHelper.js looks like. like i thought, the screen is black.

const axios = require("axios");
const DetectLanguage = require("detectlanguage");

module.exports = NodeHelper.create({
        socketNotificationReceived: async function(noti, payload) {
                if (noti === "START") {
                        if (payload.updateInterval < 120000) {
                                payload.updateInterval = 120000;
                        }
                        const self = this;
                        (async function displayWatchtower () {
                                const poem = await getWatchtower(payload);
                                self.sendSocketNotification("UPDATE", poem);
                                setTimeout(displayPoem, payload.updateInterval);
                        })();
                }
        }
});

const cheerio = require("cheerio");
const axios = require("axios").default;

const fethHtml = async url => {
  try {
    const { data } = await axios.get(url);
    return data;
  } catch {
    console.error(`ERROR: An error occurred while trying to fetch the URL: ${url}`);
  }
};

const extracWatchtower = selector => {
  const theme = selector
    .find(".tabContent active")
    .find("[class='themeScrp'] > [class='b'])
    .text()
    .trim();

 const text = selector
    .find(".bodyTxt")
    .find("[class='section']")
    .text()
    .trim();

 return { theme,
          text
 };
};

const scrapWatchtower = async () => {
  const watchtowerUrl =
    "https://wol.jw.org/hr/wol/h/r19/lp-c";

  const html = await fethHtml(watchtowerUrl);

  const selector = cheerio.load(html);

  const searchResults = selector("body")
      .find("#dailyText"
  );

  const deals = searchResults.map((idx, el) => {
      const elementSelector = selector(el);
      return extractDeal(elementSelector)
    })
    .get();

  return Watchtower;

};

[ashishtank]

@Amoniak there are lots of missing pieces… add console.log with some message in each function and see how the flow works.

[lolo]

Try to do something with this code. It will retrieve data from current day. Modifying that node_helper is not great idea.

    const url=  'https://wol.jw.org/hr/wol/h/r19/lp-c';
    request({
        url: url,
        method: 'GET'
        }, (error, response, body) => {
            if (error) {
                return console.error(error)
            };
         
            var $ = cheerio.load(body); 
            //console.log($.html());  
            const data =  $('div[class="tabContent"]').first();
                    
            let header = $(data).find('h2').text();
            let title = $(data).find('p').first().text();
            let text = $(data).find('div.pGroup>p').text();
            //console.log(header,title,text);
            var recivedData={
                header,
                title,
                text
            };
            //console.log(recivedData);
            
      
    });   

[fordi]

I bet you could use the same technique to see if any playstation 5 are in stock on websites?

[Amoniak]

@lolo thank you for the code.
I used the “MagicMirror-Module-Template” to create a new file and the associated folder.
this is my js:

‘’’

Module.register(“dnevni_citat”, {
defaults: {
updateInterval: 60000,
retryDelay: 5000
},

    requiresVersion: "2.1.0", // Required version of MagicMirror

    start: function() {
            var self = this;
            var dataRequest = null;
            var dataNotification = null;

            //Flag for check if module is loaded
            this.loaded = false;

            // Schedule update timer.
            this.getData();
            setInterval(function() {
                    self.updateDom();
            }, this.config.updateInterval);
    },

const url=  'https://wol.jw.org/hr/wol/h/r19/lp-c';
request({
    url: url,
    method: 'GET'
    }, (error, response, body) => {
        if (error) {
            return console.error(error)
        };
     
        var $ = cheerio.load(body); 
        //console.log($.html());  
        const data =  $('div[class="tabContent"]').first();
                
        let header = $(data).find('h2').text();
        let title = $(data).find('p').first().text();
        let text = $(data).find('div.pGroup>p').text();
        //console.log(header,title,text);
        var recivedData={
            header,
            title,
            text
        };
        //console.log(recivedData);
    
            }
    },

‘’’
what am I doing wrong?

[lolo]

This should be your node_helper.

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

module.exports = NodeHelper.create({

    start: function () {
        self = this;
        console.log("Starting node_helper for: " + this.name);
    },

    getData: function () {
        const url = 'https://wol.jw.org/hr/wol/h/r19/lp-c';
        request({
            url: url,
            method: 'GET'
        }, (error, response, body) => {
            if (error) {
                return console.error(error)
            };

            var $ = cheerio.load(body);
            //console.log($.html());
            const data = $('div[class="tabContent"]').first();

            let header = $(data).find('h2').text();
            let title = $(data).find('p').first().text();
            let text = $(data).find('div.pGroup>p').text();
            //console.log(header,title,text);
            var recivedData = {
                header,
                title,
                text
            }
			console.log(recivedData);
            
			self.sendSocketNotification('TEXT_RESULT', recivedData);
        });
    },

    socketNotificationReceived: function (notification, payload) {

        if (notification === 'GET_TEXT_DATA') {
            self.getData();
        }
    },
});

[lolo]

Now create MMM-Dnevni_citat.js
Inside you need first to registar module

Module.register("MMM-Dnevni_citat", {
	defaults: {
		updateInterval:  10 x  60 x 1000,       //  minute ,seconds ,milliseconds
		//retryDelay: 5000          // not needed for now
	},

Then first function will be start function

   start: function () {
        Log.info("Starting module: " + this.name);
        requiresVersion: "2.1.0";
        this.loaded = false;
        this.scheduleUpdate();

    },

with first function we are calling second ( scheduleUpdate) , how often will fetch data.

   scheduleUpdate: function () {
        setInterval(() => {
            this.getData();
        }, this.config.updateInterval);
        this.getData();
    },

Then we are calling getData function. Sending socketNotification to node_helper.

getData: function () {
        this.sendSocketNotification(''GET_TEXT_DATA'', this.config);
    },

Whe node_helper send back, next function will check if data is received and update DOM

socketNotificationReceived: function (notification, payload) {
       if (notification === "TEXT_RESULT") {
           this.textDataRecived = payload;
           this.loaded = true;
      },this.updateDom();

Now only is left to create DOM

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

        if (!this.loaded) {
            wrapper.innerHTML = "LOADING";
            return wrapper;
        }
        if (this.loaded) {
       // here to add elements and styling
           return wrapper;
       }
    },

[Amoniak]

@lolo
i did that. it is still not displayed
i added this configuration in the config.js file:

{
module: “MMM-Dnevni_citat”,
position: “middle_center”

[lolo]

It’s not displayed as DOM elements are not created.
But there is another problem with cheerio, is not loading any data for Saturday and Sunday. This is because of website. Need to find another approach.

[lolo]

node_helper. But need to find different approach.

const NodeHelper = require("node_helper");
const cheerio = require("cheerio");
const request = require('request');
var self;
module.exports = NodeHelper.create({

    start: function () {
        self = this;
        console.log("Starting node_helper for: " + this.name);
    },

    getData: function () {
        
		const url = 'https://wol.jw.org/hr/wol/h/r19/lp-c';
        request({
            url: url,
            method: 'GET'
        }, (error, response, body) => {
            if (error) {
                return console.error("ERROR: ",error)
            }
            if (!error && response.statusCode == 200) {
            var $ = cheerio.load(body);
            //console.log($.html());
            const data = $('div[class="tabContent"]').first();//   

            let header = $(data).find('h2').text();
            let title = $(data).find('p').first().text();
            let textData = $(data).find('div.pGroup>p').text();
            //console.log(header,title,text);
            var recivedData = {
                header,
                title,
                textData
            }
			//console.log('recivedData: ',recivedData);
            
			self.sendSocketNotification('TEXT_RESULT', recivedData);
			}
        });
    },

    socketNotificationReceived: function (notification, payload) {
     var self = this;
        if (notification === 'GET_TEXT_DATA') {
            //console.log(notification,payload);
			self.getData();
        }
    },
});

MMM-Dnevni_citat.js. getDom need some styling.

Module.register("MMM-Dnevni_citat", {
    defaults: {
        updateInterval: 10 * 60 * 1000, //  minute ,seconds ,milliseconds
        //retryDelay: 5000          // not needed for now
    },
    start: function () {
        Log.info("Starting module: " + this.name);
        requiresVersion: "2.1.0";
        this.loaded = false;
        this.scheduleUpdate();

    },
    scheduleUpdate: function () {
        setInterval(() => {
            this.getData();
        }, this.config.updateInterval);
        this.getData();
    },
    getData: function () {
        console.log(' GET_TEXT_DATA ', this.config)
        this.sendSocketNotification('GET_TEXT_DATA', this.config);
    },
    socketNotificationReceived: function (notification, payload) {
        if (notification === "TEXT_RESULT") {
            this.textDataRecived = payload;
            console.log(this.textDataRecived);
            this.loaded = true;
        }
        this.updateDom();

    },

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

        if (!this.loaded) {
            wrapper.innerHTML = "LOADING";
            return wrapper;
        }
        if (this.loaded) {
            var header = document.createElement("header");
            header.innerHTML = this.textDataRecived.header;
            wrapper.appendChild(header);

            var table = document.createElement('tr');
            table.classList.add("xsmall", "normal");
            var title = document.createElement('tr');
            title.innerHTML = this.textDataRecived.title;
            table.appendChild(title);
            var textData = document.createElement('tr');
            textData.innerHTML = this.textDataRecived.textData;

            table.appendChild(textData);
            table.appendChild(title);
            wrapper.appendChild(table);

        }
        return wrapper;
    },
});

config.js

		{    module: "MMM-Dnevni_citat",
             position: "middle_center"
		 },

[lolo]

@Amoniak
This should fix the problem with loading text for current Date.
node_helper:

const NodeHelper = require("node_helper");
const cheerio = require("cheerio");
const request = require('request');
var self;
const ur = 'https://wol.jw.org/wol/dt/r19/lp-c';

module.exports = NodeHelper.create({

    start: function () {
        self = this;
        self.browser
        console.log("Starting node_helper for: " + this.name);
    },

    getData: function () {
        var self = this;
        var url = self.setURL();
        request({
            url: url,
            method: 'GET'
        }, (error, response, body) => {
            if (!error) { 
                var result = JSON.parse(body);
                var contentData = result.items[0].content;
                var $ = cheerio.load(contentData);
                //console.log("cheerio:  ", $.html());
                var header = $('html>body>header>h2').text();
                var title = $('p').first().text();
                var textData = $('p').first().next().text().replace(/(\r\n|\n|\r)/gm, "");
                var recivedData = {
                    header,
                    title,
                    textData
                };
                //console.log(recivedData);    
				self.sendSocketNotification('TEXT_RESULT', recivedData);
            }
            if (error) { 
                console.log(error);
            }
        });

    },

    setURL: function () {
        console.log("ur old: ", ur);
        var utc = new Date().toJSON().slice(0, 10).replace(/-/g, '/');
        var newURL = ur.concat("/").concat(utc);
        return newURL
    },


    socketNotificationReceived: function (notification, payload) {
        var self = this;
        if (notification === 'GET_TEXT_DATA') {
            self.getData();
        }
    },
});

[Amoniak]

@lolo
thank you, I’ll try right now

[Amoniak]

@lolo there it is.
many, many, many thanks. and thanks for adding explanations

[lolo]

@Amoniak you’re welcome.
Just delete the second appendChild in MMM-Dnevni_citat.js

            var table = document.createElement('tr');
            table.classList.add("xsmall", "normal");
            var title = document.createElement('tr');
            title.innerHTML = this.textDataRecived.title;
            table.appendChild(title);
            var textData = document.createElement('tr');
            textData.innerHTML = this.textDataRecived.textData;

            table.appendChild(textData);
            table.appendChild(title);        // delete this one
            wrapper.appendChild(table);

I added twice,my mistake.

[e199504]

@amoniak how did you fix the black screen? I am getting the same error

[sdetweil]

@e199504 is this after install?

did u do the npm install in the module folder?

[e199504]

@sdetweil in the reeadme file it did not say to go inside the module and use npm install but once I did it started working.
thank you

[sdetweil]

@e199504 yes. it seems many authors forget to write that step.

general rule. look for a package.json file.
if present, run the npm install