https://krish-garg-allen-timetable-default.layer0-limelight.link | batches.json: https://gist.github.com/KrishGarg/cf1a4c9b29f779f16a8bf516940a0b8c | Direct API: https://krishgarg.npkn.net/timetable/

timetable.napkin.js

import cheerio from "cheerio";
import fetch from "node-fetch";
import fs from "fs/promises"

const ALLOWED_CLASSES = {
  "REGULAR CLASS-H": "Regular Class",
  "MERGE CLASS-H": "Merge Class"
};

const DEFAULT_BATCH = "31216-4846"

const getBatchID = async (batch) => {
  const bText = await fs.readFile("/opt/files/batches.json", "utf-8")
  const b = JSON.parse(bText)
  const reqbatch = b.find((e) => e.batch == batch)
  if (!reqbatch) return null;
  return reqbatch.id;
}

const parseAndGetTimeTableData = $ => {
  let tt = [];
  $("table").each((ti, table) => { // ti: table index -> 1 table for each day
    $(table)
      .find("tr")
      .each((i, tr) => {
        if (i == 0) return;

        if (i == 1) {
          const date = $(tr).find("td").get(0).children[0].data;
          const day = $(tr).find("td").get(1).children[0].data;
          tt[ti] = {
            ...tt[ti],
            date,
            day,
          };
          return;
        }

        let typeOfClass = $(tr).find("td").get(2).children[0].data;
        if (!ALLOWED_CLASSES[typeOfClass]) return;

        typeOfClass = ALLOWED_CLASSES[typeOfClass];

        const [from, to] = $(tr).find("td").get(3).children[0].data.split("-");
        const subject = $(tr).find("td").get(4).children[0].data;

        const classDetails = {
          subject,
          from,
          to,
          typeOfClass,
        };

        tt[ti] = {
          ...tt[ti],
          classes: [...(tt[ti].classes || []), classDetails],
        };
      });
  });

  tt = tt.filter((el) => el["classes"] && el["classes"].length > 0)
  return tt;
}

/**
 * @param {NapkinRequest} req
 * @param {NapkinResponse} res
 */
const handler = async (req, res) => {
  let batchID = DEFAULT_BATCH;
  if (req.query) {
    const { batchID: queryID, batch } = req.query;
    if (batch && !queryID) {
      const id = await getBatchID(batch);
      if (!id) return res.json({
        error: true,
        message: "Unknown Batch",
      })
      batchID = id
    }
    if (queryID) batchID = queryID;
  }

  const r = await fetch("https://jaipur.allen.ac.in/Home/GetBatchTimeTable", {
    headers: {
      accept: "text/html, */*; q=0.01",
      "content-type": "application/json; charset=UTF-8",
    },
    body: JSON.stringify({
      batchID,
    }),
    method: "POST",
  });
  const ttHtml = await r.text();

  if (ttHtml.includes("An error occurred while processing your request")) {
    return res.json({
      error: true,
      message: "There was an error."
    })
  }

  const $ = cheerio.load(ttHtml);
  let tt = parseAndGetTimeTableData($);

  const batch = $("h2").first().find("span").get(0).children[0].data;

  const full = {
    batch,
    timetable: tt,
  };

  return res.json(full);
};

export default handler;