Amazon Global Price Comparator

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

当前为 2021-12-17 提交的版本,查看 最新版本

您需要先安装一个扩展,例如 篡改猴Greasemonkey暴力猴,之后才能安装此脚本。

You will need to install an extension such as Tampermonkey to install this script.

您需要先安装一个扩展,例如 篡改猴暴力猴,之后才能安装此脚本。

您需要先安装一个扩展,例如 篡改猴Userscripts ,之后才能安装此脚本。

您需要先安装一款用户脚本管理器扩展,例如 Tampermonkey,才能安装此脚本。

您需要先安装用户脚本管理器扩展后才能安装此脚本。

(我已经安装了用户脚本管理器,让我安装!)

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

(我已经安装了用户样式管理器,让我安装!)

// ==UserScript==
// @name        Amazon Global Price Comparator
// @description It shows prices across amazon portals (IT,DE,FR,ES,UK,US) 
// @match       https://www.amazon.it/*
// @match       https://www.amazon.de/*
// @match       https://www.amazon.co.uk/*
// @match       https://www.amazon.fr/*
// @match       https://www.amazon.es/*
// @match       https://www.amazon.com/*
// @version     1.7.0
// @author      SH3LL
// @grant       GM_xmlhttpRequest
// @namespace https://greasyfork.org/users/762057
// ==/UserScript==

function get_price(url,location) {
    return new Promise(function (resolve, reject) {
        GM_xmlhttpRequest({
            method: 'GET',
            responseType: 'document',
            synchronous: false,
            url: url,
            onload: (resp) => {
                  const doc = document.implementation.createHTMLDocument().documentElement;
                  doc.innerHTML = resp.responseText;
                  let grabbed_price=null;
                  //let price_block = doc.querySelector('#priceblock_ourprice'); // id prezzo normale
                  //if(price_block === null) price_block = doc.querySelector('#apexPriceToPay').children[1] // nuova classe id del prezzo 
                  //if(price_block === null) price_block = doc.querySelector('#priceblock_saleprice') // id prezzo scontato
                  //if(price_block === null) price_block = doc.querySelector('#priceblock_dealprice') // id prezzo offerta flash
                  //if(price_block === null) price_block = doc.querySelector('#priceblock_pospromoprice') // id prezzo offerta flash
                
                  let price_block=doc.querySelector("#apex_desktop") //id blocco del prezzo
                  if(price_block===null){resolve("error"); return;} //se la pagina è vuota, esci
              
                  if(price_block.innerText.includes("€") || price_block.innerText.includes("£") || price_block.innerText.includes("$")){ // se il blocco c'è
                    
                    let etichette = price_block.getElementsByTagName("span");
                    for(let el of etichette){
                      if(el.className.includes("a-text-price") && el.getAttribute("data-a-color")==="price"){
                            grabbed_price = el.firstChild;
                            break;
                      }
                         
                    }
                  }else{ //se c'è solo la scritta "nuovo e usato da.."
                    let etichette = doc.getElementsByTagName("span"); //ottiene tutti i tag "span" della pagina
                    for(let el of etichette){
                      if(   ( el.innerText.includes("Nuevos") && el.innerText.includes("desde")  ) ||
                            ( el.innerText.includes("Nuovo") && el.innerText.includes("da") ) ||
                            ( el.innerText.includes("Neufs") && el.innerText.includes("occasions") ) ||
                            ( el.innerText.includes("Neu") && el.innerText.includes("ab")  ) ||
                            ( el.innerText.includes("New") && el.innerText.includes("from") ) 
                          ) {
                              console.log(el.children[0].children[1])
                              grabbed_price = el.children[0].children[1];
                              break;
                           }
                    }
                    
                    
                  }
                  if(grabbed_price !== null && grabbed_price !== undefined && grabbed_price.innerText !== null && grabbed_price.innerText !== undefined && grabbed_price.innerText.trim()!== "") {
                    resolve(grabbed_price.innerText); return;
                  }
                  resolve("error"); return;
           }
        });
    });
}

async function main(){  
  
    if(window.location.href.includes("/dp/") || window.location.href.includes("/gp/product/") ){
      
      //get amazon country
      let my_location = (window.location.href).split("www.amazon.")[1].split("/")[0].trim();
      
      let amz_code; //get amazon product code
      if(window.location.href.includes("/gp/product/") && window.location.href.includes("?") ){
        amz_code=(window.location.href).split("?")[0].split('/gp/product/')[1];
        
      }else if(window.location.href.includes("/gp/product/") && !window.location.href.includes("?")){
        amz_code=(window.location.href).split('/gp/product/')[1];

      }else if(window.location.href.includes("/dp/") && window.location.href.includes("?")){
         amz_code=(window.location.href).split("?")[0].split('/dp/')[1].split('/')[0];
        
      }else if(window.location.href.includes("/dp/") && !window.location.href.includes("?")){ 
         amz_code=(window.location.href).split('/dp/')[1].split('/')[0];
        
      }
      
      
      //let price_block = document.querySelector('#price');  //VECCHIO HOOK (che non esiste quando il prezzo è fuori stock)
      let price_block = document.querySelector('#desktop_unifiedPrice'); //HOOK
      if(price_block===null) price_block = document.querySelector('#productOverview_feature_div').children[0];
      
      let tr1 = document.createElement("tr");
      
      let div1 = document.createElement("div");
      div1.style.position = "relative";
      div1.style.left="100%";
      
      let message1= document.createElement("label");
      message1.innerText="⏳ Loading Prices... ⏳";
      message1.style.color="firebrick";
      
      tr1.append(div1);
      div1.append(message1);
      //price_block.children[0].children[0].append(tr1);  //VECCHIO HOOK (che non esiste quando il prezzo è fuori stock)
      price_block.append(tr1);
      
      
      let locations = ["it","de","fr","es","co.uk","com"];
      let flags = { "it":"🇮🇹", "de":"🇩🇪", "fr":"🇫🇷", "es":"🇪🇸", "co.uk":"🇬🇧", "com":"🇺🇸" };
      let prices=[],link,min_price=999999999999999999999999999;
      
      console.log("My Location:"+my_location);
      
      for(let curr_location of locations){
        let curr_price = await get_price("https://www.amazon."+curr_location+"/dp/"+amz_code , curr_location);
        
        //clean currency font in the right location
        if(curr_location=="it" || curr_location=="de" ||curr_location=="fr" ||curr_location=="es") {curr_price=curr_price.replace("€","").trim()+"€"}
        if(curr_location=="co.uk") {curr_price=curr_price.replace("£","").trim()+"£"}
        if(curr_location=="com") {curr_price=curr_price.replace("$","").trim()+"$"}
        
        
        console.log(curr_location+": price-> " + curr_price)
        
        if(curr_price!=="error"){
          //get min price
          let cleaned_price=curr_price.replace(",",".");
          cleaned_price=cleaned_price.replace("$","");
          cleaned_price=cleaned_price.replace("£","");
          cleaned_price=cleaned_price.replace("€","");
          cleaned_price=cleaned_price.trim();//remove spaces
          
          //calcola minimo prezzo
          if(parseFloat(cleaned_price)< parseFloat(min_price)){ min_price=cleaned_price }
          
          //creo link
          link= document.createElement("a");
          if(my_location.toString() === curr_location.toString()){
            link.innerText= "[["+ flags[curr_location] + " " + curr_price.replace(".",",")+"]]";
          }else{
            link.innerText= "["+ flags[curr_location] + " " + curr_price.replace(".",",")+"]";
          }
          
          link.href="https://www.amazon."+curr_location+"/dp/"+amz_code;
          link.style.color="dodgerblue";
          link.style.paddingLeft = "5px";
          link.style.paddingRight = "5px";
          
          prices.push(link);
          
        }else{
          
          //creo link
          link= document.createElement("a");
          if(my_location.toString() === curr_location.toString()){
            link.innerText= "[["+ flags[curr_location] + " stock-out]]";
          }else{
            link.innerText= "["+ flags[curr_location] + " stock-out]";
          }
          
          link.href="https://www.amazon."+curr_location+"/dp/"+amz_code;
          link.style.color="red";
          link.style.paddingLeft = "5px";
          link.style.paddingRight = "5px";
          //message.style.color="firebrick";
          
          prices.push(link);
          
        }
      }
      
      //REMOVE LOADING
      //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)
      price_block.removeChild(price_block.lastElementChild);
      
      let tr2 = document.createElement("tr");
      let div2 = document.createElement("div");
      tr2.append(div2);
      
      for(let curr_price_link of prices){
        
        let cleaned_price=curr_price_link.innerText.replace("CO.UK","");
        cleaned_price=cleaned_price.replaceAll("🇮🇹","");
        cleaned_price=cleaned_price.replaceAll("🇩🇪","");
        cleaned_price=cleaned_price.replaceAll("🇫🇷","");
        cleaned_price=cleaned_price.replaceAll("🇪🇸","");
        cleaned_price=cleaned_price.replaceAll("🇬🇧","");
        cleaned_price=cleaned_price.replaceAll("🇺🇸","");
        cleaned_price=cleaned_price.replaceAll(",",".");
        cleaned_price=cleaned_price.replaceAll("[","");
        cleaned_price=cleaned_price.replaceAll("]","");
        cleaned_price=cleaned_price.replaceAll("$","");
        cleaned_price=cleaned_price.replaceAll("£","");
        cleaned_price=cleaned_price.replaceAll("€","");
        cleaned_price=cleaned_price.trim();//remove spaces
        
        if(parseFloat(cleaned_price)===parseFloat(min_price)){curr_price_link.style.color="green"}
        div2.append(curr_price_link);
        
      }
      
      price_block.append(tr2);
    }
}

main();