booking

booking.js

// go to booking.com and search for hotels
// set your favorite filters first to reduce the result pages to 5-10.
// then paste this script in JS console

!(function () {
  function e(t, o) {
    return n
      ? void (n.transaction("s").objectStore("s").get(t).onsuccess = function (
          e
        ) {
          var t = (e.target.result && e.target.result.v) || null;
          o(t);
        })
      : void setTimeout(function () {
          e(t, o);
        }, 100);
  }
  var t =
    window.indexedDB ||
    window.mozIndexedDB ||
    window.webkitIndexedDB ||
    window.msIndexedDB;
  if (!t) return void console.error("indexDB not supported");
  var n,
    o = { k: "", v: "" },
    r = t.open("d2", 1);
  (r.onsuccess = function (e) {
    n = this.result;
  }),
    (r.onerror = function (e) {
      console.error("indexedDB request error"), console.log(e);
    }),
    (r.onupgradeneeded = function (e) {
      n = null;
      var t = e.target.result.createObjectStore("s", { keyPath: "k" });
      t.transaction.oncomplete = function (e) {
        n = e.target.db;
      };
    }),
    (window.ldb = {
      get: e,
      set: function (e, t) {
        (o.k = e),
          (o.v = t),
          n.transaction("s", "readwrite").objectStore("s").put(o);
      },
    });
})();

function between(str, first, last) {
  return str.split(first)[1].split(last)[0];
}

local = {};
function getContents(url) {
  return local[url].html;
}
async function fetchURL(url) {
  if (!local[url]) {
    console.log("Requesting ", url);
    r = await fetch(url);
    let html = await r.text();

    // lighter text

    let parser = new DOMParser();
    let doc = parser.parseFromString(html, "text/html");


    let all_prices = Array.from(doc.querySelectorAll('.prco-valign-middle-helper')).map(a=>{
      return parseInt(a.innerText.replace(/[^0-9]/g,''))
    })

    let all_m = Array.from(doc.querySelectorAll('[data-name-en="room size"]')).map(a=>{
      return parseInt(a.innerText.replace(/[^0-9]/g,''))
    })

    let all_rows = doc.querySelectorAll('.e2e-hprt-table-row')

    let offset = 0
    let counter = 0

    let price_per_sqm = {0: 99}

    let cheapest = false
    let days = document.body.innerHTML.match(/([0-9]+)-night stay/)[1]

    for (let i=0;i<all_rows.length;i++) {

      if (all_rows[i].getAttribute('class').indexOf('last-row')!=-1){
        let sqm = all_m[counter]

        let min = Math.min.apply(Math, all_prices.slice(offset, i+1));
        let per_sqm = min / sqm / days

        if (!price_per_sqm[sqm] || per_sqm < price_per_sqm[sqm]) {
          price_per_sqm[sqm] = per_sqm
        }

        if (!cheapest || per_sqm < price_per_sqm[cheapest]) {
          cheapest = sqm
        }

        console.log(url, ' sliced ', i, offset, all_prices.slice(offset, i+1), sqm)

        offset = i+1
        counter++
      }
      
    }


    let regexp = /welcoming Booking.com guests since (.*?)\.</gim;
    let rawDate = regexp.exec(html);


    let rawRating = (/>([0-9]\.[0-9])</gim).exec(html);




    let reviews = html.match(/>([0-9,]+) reviews</);

    local[url] = {
      html: html,

      reviews: reviews ? parseInt(reviews[1].replace(/,/,'')) : 0,

      rawDate: rawDate ? rawDate[1] : '',
      rawRating: rawRating ? parseFloat(rawRating[1]) : 0,
      date: rawDate ? new Date(rawDate[1]).getTime() : 0,

      all_prices: all_prices,
      all_m: all_m,
      all_rows: all_rows,

      price_per_sqm: price_per_sqm,
      cheapest: cheapest
    }

    console.log(local[url])

    /*between(
      r,
      '<div id="right" class="rlt-right" role="main">',
      '<div id="right2" class="rlt-right">'
    );*/
  }
  return local[url];
}


function filter() {
  let minRatingValue = parseFloat(minRating.value);
  let minRoomSizeValue = parseInt(minRoomSize.value);
  let maxRoomSizeValue = parseInt(maxRoomSize.value);
  let minReviewsValue = parseInt(minReviews.value);
  let maxReviewsValue = parseInt(maxReviews.value);
  let minPricePerSqmValue = parseInt(minPricePerSqm.value);
  let maxPricePerSqmValue = parseInt(maxPricePerSqm.value);

  var final = list.sort((a, b) => {

    a = local[a.querySelector("[data-testid='title-link']").href]
    b = local[b.querySelector("[data-testid='title-link']").href]


    if (sortBy.value == 'reviews'){
      return b.reviews - a.reviews
    } else if (sortBy.value == 'date') {
      return b.date - a.date;
    } else if (sortBy.value == 'price_per_sqm') {
      return a.price_per_sqm[a.cheapest] - b.price_per_sqm[b.cheapest]
    }

  });

  document.querySelector(".hotellist_wrap").innerHTML = "";
  for (var n of final) {
    let tags = [];
    a = local[n.querySelector("[data-testid='title-link']").href]

    tags.push("Added:  " + a.rawDate);

    if (!a.html.match) {
      console.log("nomatch", a.html);
      continue;
    }

    if (
      a.html.match(/Ping-pong/i) != null ||
      a.html.match(/table tennis/i) != null
    ) {
      tags.push("tabletennis");
    }

    if (a.html.match(/Coco-mat/i) != null) {
      tags.push("coco-mat");
    }

    if (a.html.match(/Bedroom&nbsp;3/i) != null) {
      tags.push("bedroom3");
    } else if (a.html.match(/Bedroom&nbsp;2/i) != null) {
      tags.push("bedroom2");
    } else if (a.html.match(/Bedroom&nbsp;1/i) != null) {
      tags.push("bedroom1");
    }

    if (!(a.rawRating >= minRatingValue &&
      a.reviews >= minReviewsValue && 
      a.reviews <= maxReviewsValue)) {
      continue
    }


    let hidden = true

    for (let m2 in a.price_per_sqm){
      if (parseInt(m2) >= minRoomSizeValue && 
        parseInt(m2) <= maxRoomSizeValue &&
        a.price_per_sqm[m2] >= minPricePerSqmValue &&
        a.price_per_sqm[m2] <= maxPricePerSqmValue
        ) {
        hidden = false
      }

      let str = m2+'  -  '+parseInt(a.price_per_sqm[m2])
      tags.push(a.cheapest == m2 ? '<b>'+str+'</b>' : str)
    }
    if (hidden) continue


    

    document.querySelector(".hotellist_wrap").innerHTML+=(tags.join("<br>"));
    document.querySelector(".hotellist_wrap").append(n);
  }
}

function extract() {
  window.list = Array.from(document.querySelectorAll('[data-testid="property-card"]'));
  var all = [];

  console.log("extracted ", list);
  for (let propertyCard of list) {
    var href = propertyCard.querySelector("[data-testid='title-link']").href;
    all.push(fetchURL(href));
  }

  Promise.all(all).then(filter);

  var div = document.createElement("div");
  div.innerHTML = `<div style="position:fixed;left:45%;top:0px;z-index:99999;background-color: bisque;  padding: 20px;">
    
  <select id="sortBy"">
    <option value="reviews" selected>Reviews count</option>
    <option value="price_per_sqm">Price per sqm</option>
    <option value="date">Date opened</option>
  </select><br>

  <input type=text id="minRating" value="8.6">Min rating<br>

  <input type=text id="minRoomSize" value="40">Min room size
  <input type=text id="maxRoomSize" value="99999999">Max room size<br>
  <input type=text id="minReviews" value="20">Min reviews
  <input type=text id="maxReviews" value="99999999">Max reviews<br>
  <input type=text id="minPricePerSqm" value="0">Min price per sqm
  <input type=text id="maxPricePerSqm" value="99999999">Max price per sqm

  </div>`;
  document.body.appendChild(div);

  sortBy.onchange = filter

  minRating.onchange = filter;
  minRoomSize.onchange = filter;
  maxRoomSize.onchange = filter;
  minReviews.onchange = filter;
  maxReviews.onchange = filter;
  minPricePerSqm.onchange = filter;
  maxPricePerSqm.onchange = filter;
}



var pagination = document.querySelectorAll('button.fc63351294.f9c5690c58')

var last_page = pagination[0] ? parseInt(pagination[pagination.length-2].innerHTML) : 1

console.log("Fetching up to "+last_page)
var all_pag = []


for (var i = 1;i<last_page;i++){ 
  let url = location.href+'&offset='+i*25
  all_pag.push(fetch(url).then(r=>r.text()).then(body=>{
    //var strip = between(body, '</div><h2 class="e6e585da68">', '<div class="d8f77e681c">')
    var strip = between(body, '<div id="ajaxsrwrap">', '</div> <!-- /ajaxsrwrap -->')
    //console.log(url, strip)
    document.querySelector('.hotellist_wrap').innerHTML += strip
  }))
}
Promise.all(all_pag).then(extract)