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Amazon Global Price Comparator

It shows prices across amazon portals (IT,DE,FR,ES,UK,US,CA,AU)

  1. // ==UserScript==
  2. // @name        Amazon Global Price Comparator
  3. // @description It shows prices across amazon portals (IT,DE,FR,ES,UK,US,CA,AU)
  4. // @match       https://www.amazon.it/*
  5. // @match       https://www.amazon.de/*
  6. // @match       https://www.amazon.co.uk/*
  7. // @match       https://www.amazon.fr/*
  8. // @match       https://www.amazon.es/*
  9. // @match       https://www.amazon.com/*
  10. // @match       https://www.amazon.com.au/*
  11. // @match       https://www.amazon.ca/*
  12. // @version     2.2
  13. // @author      SH3LL
  14. // @grant       GM_xmlhttpRequest
  15. // @namespace https://gf.qytechs.cn/users/762057
  16. // ==/UserScript==
  17.  
  18. function get_price(url,location) {
  19.     return new Promise(function (resolve, reject) {
  20.         GM_xmlhttpRequest({
  21.             method: 'GET',
  22.             responseType: 'document',
  23.             synchronous: false,
  24.             url: url,
  25.             onload: (resp) => {
  26.                   const doc = document.implementation.createHTMLDocument().documentElement;
  27.                   doc.innerHTML = resp.responseText;
  28.                   let grabbed_price=null;
  29.  
  30.                   // ----------------------------- REGULAR ITEMS ALGORITHM -----------------------------
  31.                   // --- Latest amazon grabber ---
  32.                   if(grabbed_price === null) {
  33.                     grabbed_price = doc.querySelector('span.a-price.aok-align-center.reinventPricePriceToPayMargin.priceToPay'); // id prezzo
  34.                     if(grabbed_price!==null) grabbed_price=grabbed_price.children[1];
  35.                   }
  36.                   // --- PriceBlock of type: OURPRICE ---
  37.                   if(grabbed_price === null) grabbed_price = doc.querySelector('#priceblock_ourprice'); // id prezzo
  38.                   if(grabbed_price === null) {
  39.                     grabbed_price = doc.querySelector('#apexPriceToPay');
  40.                     if(grabbed_price!== null && grabbed_price.children[1]!==null) grabbed_price=grabbed_price.children[1];
  41.                   }// nuova classe id del prezzo
  42.                   if(grabbed_price === null) grabbed_price = doc.querySelector('#priceblock_saleprice') // id prezzo scontato
  43.                   if(grabbed_price === null) grabbed_price = doc.querySelector('#priceblock_dealprice') // id prezzo offerta flash
  44.                   if(grabbed_price === null) grabbed_price = doc.querySelector('#priceblock_pospromoprice') // id prezzo offerta flash
  45.  
  46.                   // --- PriceBlock of type: "New and Used From.." ---
  47.                   if(grabbed_price === null){
  48.                     let etichette = doc.getElementsByTagName("span"); //ottiene tutti i tag "span" della pagina
  49.                     for(let el of etichette){
  50.                       if(   ( el.innerText.includes("Nuevos") && el.innerText.includes("desde")  ) ||
  51.                               ( el.innerText.includes("Nuovo") && el.innerText.includes("da") ) ||
  52.                               ( el.innerText.includes("Neufs") && el.innerText.includes("occasions") ) ||
  53.                               ( el.innerText.includes("Neu") && el.innerText.includes("ab")  ) ||
  54.                               ( el.innerText.includes("New") && el.innerText.includes("from") )
  55.                           ) {
  56.                               if(el.children[0]!==undefined && el.children[0].children[1]!==undefined){
  57.                                 grabbed_price = el.children[0].children[1];
  58.                               }
  59.                               break;
  60.  
  61.                             }
  62.                     }
  63.                   }
  64.  
  65.                   // ----------------------------- BOOK ITEMS ALGORITHM -----------------------------
  66.                   // --- PriceBlock of type: APEX ---
  67.                   let price_block=doc.querySelector("#apex_desktop"); //id blocco del prezzo
  68.                   // --- PriceBlock of type: swatchElement (for Books)
  69.                   if(price_block===null && grabbed_price===null) price_block=doc.querySelector("#tmmSwatches");
  70.                   if(price_block!==null && grabbed_price===null){
  71.                     if(price_block.innerText.includes("€") || price_block.innerText.includes("£") || price_block.innerText.includes("$")){ // se il blocco c'è
  72.                       let etichette = price_block.getElementsByTagName("span");
  73.                       for(let el of etichette){
  74.                         if(el.className.includes("a-text-price") && el.getAttribute("data-a-color")==="price"){
  75.                               grabbed_price = el.firstChild;
  76.                               break;
  77.                         }
  78.                         if(el.className.includes("a-price") && el.className.includes("priceToPay")){
  79.                               grabbed_price = el.firstChild;
  80.                               break;
  81.                         }
  82.  
  83.                         if(el.className.includes("a-size-base") && el.className.includes("a-color-price")){// for books
  84.                               grabbed_price = el;
  85.                               break;
  86.                         }
  87.                         if(el.id==="priceblock_ourprice"){
  88.                           grabbed_price = el;
  89.                           break;
  90.                         }
  91.                       }
  92.                     }
  93.                   }
  94.  
  95.  
  96.  
  97.                   // PASS THE OUTPUT
  98.                   if(grabbed_price !== null && grabbed_price !== undefined && grabbed_price.innerText !== null && grabbed_price.innerText !== undefined && grabbed_price.innerText.trim()!== "" && grabbed_price.innerText.length < 10) {
  99.                     resolve(grabbed_price.innerText); return;
  100.                   }
  101.                   resolve("error"); return;
  102.            }
  103.         });
  104.     });
  105. }
  106.  
  107. async function main(){
  108.  
  109.     if(window.location.href.includes("/dp/") || window.location.href.includes("/gp/product/") ){
  110.  
  111.       //get amazon country
  112.       let my_location = (window.location.href).split("www.amazon.")[1].split("/")[0].trim();
  113.  
  114.       let amz_code; //get amazon product code
  115.       if(window.location.href.includes("/gp/product/") && window.location.href.includes("?") ){
  116.         amz_code=(window.location.href).split("?")[0].split('/gp/product/')[1];
  117.  
  118.       }else if(window.location.href.includes("/gp/product/") && !window.location.href.includes("?")){
  119.         amz_code=(window.location.href).split('/gp/product/')[1];
  120.  
  121.       }else if(window.location.href.includes("/dp/") && window.location.href.includes("?")){
  122.          amz_code=(window.location.href).split("?")[0].split('/dp/')[1].split('/')[0];
  123.  
  124.       }else if(window.location.href.includes("/dp/") && !window.location.href.includes("?")){
  125.          amz_code=(window.location.href).split('/dp/')[1].split('/')[0];
  126.  
  127.       }
  128.  
  129.       //let price_block = document.querySelector('#price');  //VECCHIO HOOK (che non esiste quando il prezzo è fuori stock)
  130.       let price_block = document.querySelector('#desktop_unifiedPrice'); //HOOK
  131.       if(price_block===null || price_block===undefined ) {price_block = document.querySelector('#productOverview_feature_div'); if(price_block!==null && price_block!==undefined) price_block=price_block.children[0];}
  132.       if(price_block===null || price_block===undefined ) {price_block = document.querySelector('#adoptedData');}
  133.       console.log(price_block);
  134.       let tr1 = document.createElement("tr");
  135.  
  136.       let div1 = document.createElement("div");
  137.       div1.style.position = "relative";
  138.       div1.style.left="100%";
  139.  
  140.       let message1= document.createElement("label");
  141.       message1.innerText="⏳ Loading Prices..";
  142.       message1.style.color="firebrick";
  143.  
  144.       tr1.append(div1);
  145.       div1.append(message1);
  146.       //price_block.children[0].children[0].append(tr1);  //VECCHIO HOOK (che non esiste quando il prezzo è fuori stock)
  147.       price_block.append(tr1);
  148.  
  149.       let locations = ["it","de","fr","es","co.uk","com","com.au","ca"];
  150.       let flags = { "it":"🇮🇹", "de":"🇩🇪", "fr":"🇫🇷", "es":"🇪🇸", "co.uk":"🇬🇧", "com":"🇺🇸","ca": "🇨🇦", "com.au": "🇦🇺" };
  151.       let prices=[],link,min_price=999999999999999999999999999;
  152.  
  153.       console.log("My Location:"+my_location);
  154.  
  155.       for(let curr_location of locations){
  156.         let curr_price = await get_price("https://www.amazon."+curr_location+"/dp/"+amz_code , curr_location);
  157.  
  158.         console.log(curr_location+": price-> " + curr_price)
  159.  
  160.         if(curr_price!=="error"){
  161.           //clean currency font in the right location
  162.           if(curr_location=="it" || curr_location=="de" ||curr_location=="fr" ||curr_location=="es") {curr_price=curr_price.replace("€","").trim()+"€"}
  163.           if(curr_location=="co.uk") {curr_price=curr_price.replace("£","").trim()+"£"}
  164.           if(curr_location=="com" || curr_location=="com.au" || curr_location=="ca") {curr_price=curr_price.replace("$","").trim()+"$"}
  165.  
  166.           //get min price
  167.           let cleaned_price="";
  168.           cleaned_price=curr_price.replace(",",".");
  169.           cleaned_price=cleaned_price.replace("$","");
  170.           cleaned_price=cleaned_price.replace("£","");
  171.           cleaned_price=cleaned_price.replace("€","");
  172.           cleaned_price=cleaned_price.trim();//remove spaces
  173.  
  174.           //calcola minimo prezzo
  175.           if(parseFloat(cleaned_price)< parseFloat(min_price)){ min_price=cleaned_price }
  176.  
  177.           //creo link
  178.           link= document.createElement("a");
  179.           if(my_location.toString() === curr_location.toString()){
  180.             link.innerText= "<"+ flags[curr_location] + " " + curr_price.replace(".",",")+">";
  181.           }else{
  182.             link.innerText= "["+ flags[curr_location] + " " + curr_price.replace(".",",")+"]";
  183.           }
  184.  
  185.           link.href="https://www.amazon."+curr_location+"/dp/"+amz_code;
  186.           link.style.color="dodgerblue";
  187.           link.style.paddingLeft = "5px";
  188.           link.style.paddingRight = "5px";
  189.  
  190.           prices.push(link);
  191.  
  192.         }else{
  193.  
  194.           //creo link
  195.           link= document.createElement("a");
  196.           if(my_location.toString() === curr_location.toString()){
  197.             link.innerText= "<"+ flags[curr_location] + " stock-out>";
  198.           }else{
  199.             link.innerText= "["+ flags[curr_location] + " stock-out]";
  200.           }
  201.  
  202.           link.href="https://www.amazon."+curr_location+"/dp/"+amz_code;
  203.           link.style.color="red";
  204.           link.style.paddingLeft = "5px";
  205.           link.style.paddingRight = "5px";
  206.           //message.style.color="firebrick";
  207.  
  208.           prices.push(link);
  209.  
  210.         }
  211.       }
  212.  
  213.       //REMOVE LOADING
  214.       //price_block.children[0].children[0].removeChild(price_block.children[0].children[0].lastElementChild); //VECCHIO HOOK (che non esiste quando il prezzo è fuori stock)
  215.       price_block.removeChild(price_block.lastElementChild);
  216.  
  217.       //Appen Price Block
  218.       let tr2 = document.createElement("tr");
  219.       let div2 = document.createElement("div");
  220.       tr2.append(div2);
  221.  
  222.       for(let curr_price_link of prices){
  223.  
  224.         let cleaned_price=curr_price_link.innerText.replace("CO.UK","");
  225.         cleaned_price=cleaned_price.replaceAll("🇮🇹","");
  226.         cleaned_price=cleaned_price.replaceAll("🇩🇪","");
  227.         cleaned_price=cleaned_price.replaceAll("🇫🇷","");
  228.         cleaned_price=cleaned_price.replaceAll("🇪🇸","");
  229.         cleaned_price=cleaned_price.replaceAll("🇬🇧","");
  230.         cleaned_price=cleaned_price.replaceAll("🇺🇸","");
  231.         cleaned_price=cleaned_price.replaceAll("🇦🇺","");
  232.         cleaned_price=cleaned_price.replaceAll("🇨🇦","");
  233.         cleaned_price=cleaned_price.replaceAll(",",".");
  234.         cleaned_price=cleaned_price.replaceAll("[","");
  235.         cleaned_price=cleaned_price.replaceAll("]","");
  236.         cleaned_price=cleaned_price.replaceAll("<","");
  237.         cleaned_price=cleaned_price.replaceAll(">","");
  238.         cleaned_price=cleaned_price.replaceAll("$","");
  239.         cleaned_price=cleaned_price.replaceAll("£","");
  240.         cleaned_price=cleaned_price.replaceAll("€","");
  241.         cleaned_price=cleaned_price.trim();//remove spaces
  242.  
  243.         if(parseFloat(cleaned_price)===parseFloat(min_price)){curr_price_link.style.color="green"}
  244.         div2.append(curr_price_link);
  245.  
  246.       }
  247.  
  248.       price_block.append(tr2);
  249.  
  250.       /*Append "OTHER SELLERS" block
  251.       let other_seller_link=document.createElement("a")
  252.       let tr3 = document.createElement("tr");
  253.       let div3 = document.createElement("div");
  254.  
  255.       other_seller_link.href="https://www.amazon.it/gp/offer-listing/"+amz_code+"/ref=dp_olp_pn"
  256.       other_seller_link.innerText="{Force Sellers List}"
  257.       other_seller_link.style.textAlign = "center"
  258.  
  259.       div3.append(other_seller_link);
  260.       tr3.append(div3);
  261.  
  262.       price_block.append(tr3);*/
  263.     }
  264. }
  265.  
  266. main();

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