app.js

/* dotenv */
if (process.env.NODE_ENV !== "production") {
  require("dotenv").config();
};

/* libraries */
const express = require("express");
const path = require("path");
const ejs = require('ejs');
const fs = require('fs');
const { google } = require('googleapis');
const i18n = require('./config/i18n');
const cookieParser = require('cookie-parser'); 

const { convertXmlToHtml, convertCommentXMLToHtml, convertXmlToHtmlWithImages, convertTranslationXMLToHtml } = require('./assets/js/convert.js');
//const { xmlInfo } = require('./assets/js/collect_info.js');

/* app */
const app = express();

app.use(cookieParser());
app.use(i18n.init);

/* static files */
app.use("/assets", express.static("assets"));
app.use("/data", express.static("data"));


/* views */
app.set("views", [
  path.join(__dirname, "views")
]);
app.set("view engine", "ejs");
// app.use("/views", express.static("views"));

app.get('/change-language/:lang', (req, res) => {
  const lang = req.params.lang;
  if (['en', 'it'].includes(lang)) {
    res.cookie('lang', lang);
    // Redirect back to the previous page
    res.redirect(req.headers.referer || '/');
  } else {
    res.redirect('/');
  }
});

/* index */
app.get(process.env.URL_PATH, (req, res) => {
  var arrayN = ["1", "2", "3"];
  res.render("index", {
    arrayN: arrayN,
    currentLang: req.getLocale()
  });
});

/* introduzione */
const introduzione = require("./routes/introduzione");
app.use("/", introduzione);

/* progetto */
const progetto = require("./routes/progetto");
app.use("/", progetto);

/* commenti */
const commenti = require("./routes/commenti");
app.use("/", commenti);

/* commenti */
const traduzione = require("./routes/traduzione");
app.use("/", traduzione);

/* reader */
const reader = require("./routes/reader");
app.use("/", reader);

/* traduco */
const traduco = require("./routes/traduco");
app.use("/", traduco);

/* vedo */
const vedo = require("./routes/vedo");
app.use("/", vedo);

/* vignette */
const vignette = require("./routes/vignette");
app.use("/", vignette);

/* credits */
const credits = require("./routes/credits");
app.use("/", credits);

/* prova estrazione id */
function extractIds(html) {
  const idArray = [];
  const regex = /<span[^>]*id=["']([^"']+-[^"']+)["'][^>]*>/g;
  let match;

  while ((match = regex.exec(html)) !== null) {
    const id = match[1];
    idArray.push(id.split("-")[1]); //all the ids are "2b-01"; if [0] it would print only 2b
  }

  return idArray;

};

app.get('/extract-ids', (req, res) => {
  fs.readFile('./quarantana/html/cap1.html', 'utf8', (err, data) => {
    if (err) {
      console.error('Error reading the EJS file:', err);
      res.status(500).send('Error reading the EJS file');
      return;
    }

    const renderedHtml = ejs.render(data);
    const idArray = extractIds(renderedHtml);

    res.json(idArray);

  });
});

app.get('/get-chapter/:chapterName', function (req, res) {
  var chapterName = req.params.chapterName;

  if (chapterName === "Introduzione") {
    chapterName = "intro";
  }
  converted_data = convertXmlToHtml(chapterName);
  res.send(converted_data);
});

app.get('/get-chapter-with-images/:chapterName', function (req, res) {
  var chapterName = req.params.chapterName;

  if (chapterName === "Introduzione") {
    chapterName = "intro";
  } else if (chapterName === "Frontespizio") {
    chapterName = "header";
  }
  converted_data = convertXmlToHtmlWithImages(chapterName);
  res.send(converted_data);
});


// app.get('/get-comment/:authorName?', function (req, res) {
//   var author = req.params.authorName;

//   if (author) {
//       try {
//           var converted_data = convertCommentXMLToHtml(author);
//           res.send(converted_data);
//       } catch (error) {
//           // Handle errors that might occur during conversion
//           console.error(error);
//           res.status(500).send('An error occurred while processing your request.');
//       }
//   } else {
//       // Send an empty object if the authorName parameter is not provided
//       res.status(200).send("");
//   }
// });

app.get('/get-comment/:authorName/:chapterName?', function (req, res) {
  var author = req.params.authorName;
  var chapter = req.params.chapterName || 'intro'; // Default to 'intro' if chapterName is not provided

  if (chapter === 'Introduzione') {
    chapter = 'intro';
  }

  if (author && chapter) {
    try {
      var converted_data = convertCommentXMLToHtml(author, chapter);

      if (converted_data && converted_data.trim()) {
        res.send(converted_data);
      } else {
        // Comment not found
        res.status(204).send(); // No Content
      }
    } catch (error) {
      console.error(error);
      res.status(500).send('An error occurred while processing your request.');
    }
  } else {
    res.status(400).send('Author name and chapter are required.');
  }
});



app.get('/get-translation/:language/:chapterName?', function (req, res) {
  var language = req.params.language;
  var chapter = req.params.chapterName;
  if (chapter === "Introduzione") {
    chapter = "intro";
  }

  if (language && chapter) {
    try {
      var converted_data = convertTranslationXMLToHtml(language, chapter);
      res.send(converted_data);
    } catch (error) {
      // Handle errors that might occur during conversion
      console.error(error);
      res.status(500).send('An error occurred while processing your request.');
    }
  } else {
    // Send an empty object if the authorName parameter is not provided
    res.status(200).send("");
  }
});

// Function to get GA4 analytics data
async function getAnalyticsData() {
  const auth = new google.auth.GoogleAuth({
    keyFile: process.env.GOOGLE_APPLICATION_CREDENTIALS,
    scopes: 'https://www.googleapis.com/auth/analytics.readonly',
  });

  const authClient = await auth.getClient();
  const analyticsData = google.analyticsdata('v1beta');

  const request = {
    auth: authClient,
    property: `properties/${process.env.GA_PROPERTY_ID}`,
    requestBody: {
      dateRanges: [{ startDate: '2023-01-12', endDate: 'today' }],
      dimensions: [{ name: 'country' }],
      metrics: [{ name: 'activeUsers' }],
    },
  };

  const response = await analyticsData.properties.runReport(request);
  return response.data;

};

app.get('/visitors', async (req, res) => {
  try {
    const data = await getAnalyticsData();
    res.json(data);
  } catch (error) {
    console.error('Error fetching analytics data:', error);
    res.status(500).send('Error fetching analytics data');
  }
});

/* port */
const port = 8000;
app.listen(port, () => console.log(`Quaranta commenti is listening on localhost:${port}${process.env.URL_PATH}`));