content.js

function getPersonalData(){
  let dp=document.getElementsByClassName('pull-left image')[0].getElementsByTagName('img')[0].src;
  let name=document.getElementsByClassName('pull-left info')[0].getElementsByTagName('p')[0].innerHTML.trim();
  let str=document.getElementsByClassName('content-header')[0]
  .getElementsByClassName('breadcrumb')[0]
  .getElementsByTagName('li')[1].innerText;
  
  
  // let d=document.getElementsByClassName('col-lg-12');
  // let roll_no;
  // let programme;
  // let dept;
  // let appliedCredits;
  // for(let i=1;i<d.length;i++){
  //     if(d[i].getElementsByTagName('div')[0].previousElementSibling.innerText==="Applied Credits :"){
  //         appliedCredits=d[i].getElementsByTagName('div')[0].innerText;
  //     }
  //     else if(d[i].getElementsByTagName('div')[0].previousElementSibling.innerText==="Roll No. :"){
  //         roll_no=d[i].getElementsByTagName('div')[0].innerText;
  //     }
  //     else if(d[i].getElementsByTagName('div')[0].previousElementSibling.innerText==="Programme :"){
  //         programme=d[i].getElementsByTagName('div')[0].innerText;
  //     }
  //     else if(d[i].getElementsByTagName('div')[0].previousElementSibling.innerText==="Department :"){
  //         dept=d[i].getElementsByTagName('div')[0].innerText;
  //     }
  // }
      
  let roll_no=document.getElementsByClassName('row col-lg-12 form-group')[0].getElementsByClassName('col-sm-4 col-lg-8 col-xs-4 col-md-4')[0].innerText;
  let programme=document.getElementsByClassName('row col-lg-12 form-group')[1].getElementsByClassName('col-sm-4 col-lg-8 col-xs-4 col-md-4')[0].innerText;
  let dept=document.getElementsByClassName('row col-lg-12 form-group')[1].getElementsByClassName('col-sm-4 col-lg-8 col-xs-4 col-md-4')[1].innerText;
  let appliedCredits=document.getElementsByClassName('row col-lg-12 form-group')[2].getElementsByClassName('col-sm-4 col-lg-8 col-xs-4 col-md-4')[0].innerText;

  let sem="";
  for(let i=0;i<str.length;i++){
      if((str[i]>='0'&&str[i]<='9')||str[i]==='/') sem+=str[i];
  }
  sem=sem.slice(0,4) +'-'+sem.slice(4);
  return {dp:dp,name:name,roll_no:roll_no,programme:programme,dept:dept,appliedCredits:appliedCredits,sem:sem};

}    


chrome.runtime.onMessage.addListener(async function(request, sender, sendResponse) {
  if (request.action === 'GetTT') {
     // check the page 
      // if the "headerText" of the page is  "Student Add & Drop Application" then put the value of the var t = 1;
      // if the "headerText" of the page is " Form Status" then put the value of the var t = 2
      const bodyContent = document.body.innerHTML;
      const parser = new DOMParser();
      const doc = parser.parseFromString(bodyContent, 'text/html');
      let timetable = {}
      let personal_data = {}
      if(!CheckSite(doc)){
          sendResponse({timetable: timetable, personal_data: personal_data});
          return
      }
      var headerText = doc.getElementById("headerText");
      var t;
      if (headerText === "Student Add & Drop Application") {
      t = 1;
      } else if (headerText === "Form Status") {
      t = 2;
      } else {
          t = 0; 
      }           

      if(t === 1 || t === 0){
          
      personal_data = getPersonalData();
      const datatable1 = doc.getElementById("datatable1");
    
      if (datatable1) {
        const content = datatable1.getElementsByTagName("tbody");
        const rows = content[0].getElementsByTagName("tr");
        // console.log(rows.length)
        for (let j = 0; j < rows.length; j++) {
          const x = rows[j].getElementsByTagName("td");
          let lectureData = [];
          let tutorialData = [];
          let practicalData = [];
          const inputString = x[8].innerText;
          const parts = inputString.split(',');
          const lhc=parseLHC(inputString)
          for (const part of parts) {
            // console.log(part)
            if (part.includes('Lec')) {
              const data = parseTimeAndDays(part,'Lec');
              if (data) {
                lectureData.push(data)
              }
            } 
            else if (part.includes('Tut')) {
              const data = parseTimeAndDays(part,'Tut');
              // console.log(data)
              if (data) {
                tutorialData.push(data);
              }
            } 
            else if (part.includes('Prc')) {
              const data = parseTimeAndDays(part,'Prc');
              if (data) {
                practicalData.push(data);
              }
            }
          }
          
          if (lectureData.length > 0) {
              for (const day0 of lectureData[0].days) {
                  let day=Day(day0)
                  if (!timetable.hasOwnProperty(day)) {
                      timetable[day] = [];
                  }
              if(!(lectureData[0].start==="00:00"||lectureData[0].end==="00:00")){
                timetable[day].push({
                time: lectureData[0].start,
                time_end: lectureData[0].end,
                title: "Lec-"+removeExtas(x[1].innerText),
                lectureHall: lhc
              });
              }
            }
          }
          
          if (tutorialData.length > 0) {
            for (const day0 of tutorialData[0].days) {
              let day=Day(day0)
                  if (!timetable.hasOwnProperty(day)) {
                      timetable[day] = [];
                  }
                  if(!(tutorialData[0].start==="00:00"||tutorialData[0].end==="00:00")){
                          timetable[day].push({
                          time: tutorialData[0].start,
                          time_end: tutorialData[0].end,
                          title: "Tut-"+removeExtas(x[1].innerText),
                          lectureHall: ''
                      });
                  }
            }
          }
          
          if (practicalData.length > 0) {
              for (const day0 of practicalData[0].days) {
                  let day=Day(day0)
                  if (!timetable.hasOwnProperty(day)) {
                      timetable[day] = [];
                  }
              if(!(practicalData[0].start==="00:00"||practicalData[0].end==="00:00")){
                  timetable[day].push({
                  time: practicalData[0].start,
                  time_end: practicalData[0].end,
                  title: "Prc-"+removeExtas(x[1].innerText),
                  lectureHall: ''
                });
              }
            }
          }
        }
        const days=['Monday','Tuesday','Wednesday','Thursday','Friday']
        for(const day in days){
          timetable[days[day]].sort(compareTime);
        }
      }
      sendResponse({ timetable: timetable, personal_data: personal_data });
      }

      if(t === 2 || t === 0){
      const content = doc.getElementsByClassName("fc-event-container")
      let d = -1;
      for(let i=0; i<content.length; i++){
      const x = content[i].getElementsByClassName("fc-content")
      if(!(x.length)){
          d++;
      }
      for(let j=0; j<x.length; j++){
          const time1 = x[j].getElementsByClassName("fc-time")
          const title1 = x[j].getElementsByClassName("fc-title")
          let time = null
          let time_start = null;
          let time_end = null;
          let title = null;
          Array.from(time1).forEach((element) => {
              time = element.getAttribute("data-full")
              for(let k=0; k<time.length; k++){
                  if(time[k] === '-'){
                      time_start = time.slice(0,k-1)
                      time_end = time.slice(k+2)
                  }
              }
            });
          Array.from(title1).forEach((element) => {
              title = element.innerText
            });
          let day = Day(d);
          if (!timetable.hasOwnProperty(day)) {
              timetable[day] = [];
          }
          timetable[day].push({ time: time_start, time_end: time_end, title: title , lectureHall : '' })
      }
    }
    sendResponse({timetable: timetable, personal_data: personal_data});

      }
  
  }
  if(request.action === 'LHC'){
      const bodyContent = document.body.innerHTML;
      const parser = new DOMParser();
      const doc = parser.parseFromString(bodyContent, 'text/html');
      chrome.runtime.sendMessage({action: 'alert', alert_type: CheckSite_1(doc)});
      if(CheckSite_1(doc) !== '3'){
          return
      }
      let data
      search(request.courses, 10).then(LHC => {
          console.log(LHC)
          chrome.runtime.sendMessage({ action: 'LHCData', data: LHC });
      })
      .catch(error => {
          console.error(error);
      });
  }
});

async function search(queries, delay) {
  let LHC = {}
  const parent = document.getElementById('datatable_filter');
  const input = parent.querySelector('.form-control');

  for (const query of queries) {
      console.log(query);
      input.value = '(' + query + ')';
      const inputEvent = new Event('input', { bubbles: true });
      input.dispatchEvent(inputEvent);
      const changeEvent = new Event('change', { bubbles: true });
      input.dispatchEvent(changeEvent);
      
      await new Promise(resolve => setTimeout(resolve, delay));

      const table = document.getElementById('datatable');
      const tbody = table.tBodies[0]
      const firstRow = tbody.rows[0];
      const firstCell = firstRow.cells[9];
      const innerText = firstCell.innerText;
      LHC[query] = innerText
      console.log(innerText);
  }
  return LHC
}


// function CheckSite_1(doc){
//     const header = doc.getElementById('headerText')
//     if(header == null){
//         return '1'
//     }
//     if(header.innerText != ' Check Timetable'){
//         return '1'
//     }
//     const show = doc.getElementById('showTimeTableBtn')
//     if (showTimeTableBtn.getAttribute('disabled') !== null) {
//         return '2'
//     }
//     if(showTimeTableBtn.getAttribute('disabled') == null){
//         const table = document.getElementById('datatable');
//         const tbody = table.tBodies[0]
//         if(tbody.innerText === 'No data available in table'){
//             InvalidSite_1(2)
//             return '2'
//         }
//     }
//     return '3'
// }


function CheckSite(doc){
  const header = doc.getElementById('headerText')
  if(header === null){
      return false
  }
  if(!header.innerText.includes('Status')){
      return false
  }
  return true
}


function Day(d){
  if(d == 0){
      return "Monday"
  }
  if(d == 1){
      return "Tuesday"
  }
  if(d == 2){
      return "Wednesday"
  }
  if(d == 3){
      return "Thursday"
  }
  if(d == 4){
      return "Friday"
  }
}

function parseTimeAndDays(input, classType) {
let idx = input.indexOf(classType);
idx += 5;
let dayString = '';
let startTime = '';
let endTime = '';
while (input[idx] >= 'A' && input[idx] <= 'Z' || input[idx] >= 'a' && input[idx] <= 'z') {
  dayString += input[idx];
  idx++;
}
idx++;
for (let i = 0; i < 5; i++) {
  startTime += input[idx];
  idx++;
}
idx++;
for (let i = 0; i < 5; i++) {
  endTime += input[idx];
  idx++;
}
let days = [];
if (dayString.includes('F')) days.push(4);
if (dayString.includes('W')) days.push(2);
if (dayString.includes('M')) days.push(0);
  //if there is a T 
idx = dayString.indexOf('T');
let count = 0;
  //Then check the number of T's 
  //if there are 2 T's then 
  // There are Two T's
for (let i = 0; i < dayString.length; i++) {
  if (dayString[i] === 'T') count++;
}
  // If there is only One T 
  // We have to check for that 
if (count == 1){
  idx = dayString.indexOf('T');
  if (idx == dayString.length - 1) days.push(1);
  else if (dayString[idx + 1] == 'h') {
    days.push(3);
  }
} else if (count == 2) {
  days.push(1);
  days.push(3);
}
return { days: days, start: startTime, end: endTime };
}


function removeExtas(s){
let out='';
for(let i =0;i<s.length;i++){
  if(s[i]>='A'&&s[i]<='Z'||s[i]>='a'&&s[i]<='Z'||s[i]>='0'&&s[i]<='9') out+=s[i]
}
return out
}
function parseLHC(input){
let idx=input.indexOf('(')
let lhc=''
if(idx==-1) return lhc;
idx++;
while(input[idx]!=')'){
  lhc+=input[idx]
  idx++
}
return lhc
}

function compareTime(a, b) {
const timeA = a.time;
const timeB = b.time;

if (timeA < timeB) {
  return -1;
}
if (timeA > timeB) {
  return 1;
}
return 0;
}