Error Node_helper custome Module

Chiiki58

Hey Guys i’m trying to set up a custome Module to screen the menu of my scools canteen. I ask ChatGPT for the Scripts but he can’t help me anymore thats the reason why i write here.

The module is called MenuZFV and has a .js file as well as .css and also a node_helper.js which I paste below. The problem is the data can be accessed from the website: (‘https://app.food2050.ch/de/stfw/restaurant -stfw/menu/mittagsmenue/weekly?week=26’) cannot be accessed. Npm install in the folder was done. ChatGPT recommended puppeteer to me because there is no DOM on the website, I installed it via npm install, but when I run node node_helper.js this log comes up - can anyone help me?

LOG:

node:internal/modules/cjs/loader:1051
  throw err;
  ^

Error: Cannot find module 'node_helper'
Require stack:
- /home/pi/MagicMirror/modules/MMM-MenuZFV/node_helper.js
    at Module._resolveFilename (node:internal/modules/cjs/loader:1048:15)
    at Module._load (node:internal/modules/cjs/loader:901:27)
    at Module.require (node:internal/modules/cjs/loader:1115:19)
    at require (node:internal/modules/helpers:130:18)
    at Object.<anonymous> (/home/pi/MagicMirror/modules/MMM-MenuZFV/node_helper.js:1:20)
    at Module._compile (node:internal/modules/cjs/loader:1241:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1295:10)
    at Module.load (node:internal/modules/cjs/loader:1091:32)
    at Module._load (node:internal/modules/cjs/loader:938:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:83:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ '/home/pi/MagicMirror/modules/MMM-MenuZFV/node_helper.js' ]
}

Node.js v20.8.0

.JS:

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch({ headless: true });
  const page = await browser.newPage();
  const url = 'https://app.food2050.ch/de/stfw/restaurant-stfw/menu/mittagsmenue/weekly?week=26';

  try {
    await page.goto(url, { waitUntil: 'networkidle2' });

    const menuItems = await page.evaluate(() => {
      const items = [];
      document.querySelectorAll('p.sc-e418db57-3.eOyIUO').forEach(item => {
        items.push(item.textContent.trim());
      });
      return items;
    });

    console.log('Menu Items:');
    console.log(menuItems);

  } catch (error) {
    console.error('Error fetching menu:', error);
  } finally {
    await browser.close();
  }
})();

.CSS:

.MMM-MenuZFV .day {
    font-weight: bold;
    padding-top: 10px;
}

.MMM-MenuZFV .menu-name {
    text-align: left;
}

.MMM-MenuZFV .menu-price {
    text-align: right;
}

NODE_HELPER.JS:

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

module.exports = NodeHelper.create({
  start: function () {
    console.log('Starting node helper for: ' + this.name);
  },

  socketNotificationReceived: function (notification, payload) {
    if (notification === 'GET_MENU') {
      console.log('Fetching menu from URL: ' + payload.url); // Log the URL being fetched
      this.getMenu(payload.url); // Pass the URL from payload
    }
  },

  getMenu: async function (url) {
    try {
      const browser = await puppeteer.launch({ headless: true });
      const page = await browser.newPage();
      await page.goto(url, { waitUntil: 'networkidle2' });

      const menuItems = await page.evaluate(() => {
        const items = [];
        document.querySelectorAll('p.sc-e418db57-3.eOyIUO').forEach(item => {
          items.push(item.textContent.trim());
        });
        return items;
      });

      await browser.close();

      console.log('Extracted menu items:');
      console.log(menuItems);

      if (menuItems.length === 0) {
        menuItems.push('Kein Menü gefunden.');
      }

      this.sendSocketNotification('MENU_RESULT', menuItems);
    } catch (error) {
      console.error('Error fetching menu:', error);
      this.sendSocketNotification('MENU_RESULT', ['Fehler beim Abrufen des Menüs.']);
    }
  }
});

Thank you very much for your time and help.

sdetweil

@Chiiki58 where are you building this module?? are the files located in a folder off the MagicMirror/modules folder??

we create alias entries to the includes for some things…

so your files have to be in the right place…

pupetteer is really about executing a web page, clicking, scrolling

you shouldn’t need that I don’t think…

cheerio will let you extract parts of the page and
https://www.npmjs.com/package/cheerio
https://www.npmjs.com/package/html-to-json-parser
html_to_json to convert them to json

also, see my sampleModule that has working node_helper.js
https://github.com/sdetweil/SampleModule

also, names matter… MagicMirror is case sensitive

and the link to the doc for module creators
https://docs.magicmirror.builders/development/introduction.html

sdetweil

@Chiiki58 also note the required files

module_name(in config.js) = folder_name = filename.js = register inside this file
all MUST MATCH exactly

your .js doesn’t have the register

css file name has to match the return from

getStyles: function

Chiiki58

@sdetweil Yeah of course I have everything in the right folder with the right name

I also had cheerio installed, I’ll have to check it out

I’ll try it with httptojson

Thank you very much, Sam

Chiiki58

It works, thank you very much for the input. I’ll probably upload it to GIT once I get the layout right. Now I’ve just unstructured all the text from the website

sdetweil

@Chiiki58 awesome, glad you’re making progress.