Compare product prices on Amazon.fr, Amazon.de, Amazon.es, and Amazon.it to find the best deal.
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// ==UserScript==
// @license MIT
// @name European Price Checker for Amazon (fr, de, es, it)
// @namespace http://tampermonkey.net/
// @version 1.5
// @description Compare product prices on Amazon.fr, Amazon.de, Amazon.es, and Amazon.it to find the best deal.
// @author bNj
// @match https://www.amazon.fr/*
// @match https://www.amazon.de/*
// @match https://www.amazon.es/*
// @match https://www.amazon.it/*
// @grant GM_xmlhttpRequest
// @connect amazon.fr
// @connect amazon.es
// @connect amazon.it
// @connect amazon.de
// ==/UserScript==
(function() {
'use strict';
const ASIN_REGEX = /\/([A-Z0-9]{10})(?:[/?]|$)/;
const asinMatch = window.location.href.match(ASIN_REGEX);
if (!asinMatch) {
return;
}
const asin = asinMatch[1];
const amazonSites = [
{ name: 'Amazon.fr', url: `https://www.amazon.fr/dp/${asin}`, domain: 'amazon.fr', flag: 'https://flagcdn.com/w20/fr.png' },
{ name: 'Amazon.es', url: `https://www.amazon.es/dp/${asin}`, domain: 'amazon.es', flag: 'https://flagcdn.com/w20/es.png' },
{ name: 'Amazon.it', url: `https://www.amazon.it/dp/${asin}`, domain: 'amazon.it', flag: 'https://flagcdn.com/w20/it.png' },
{ name: 'Amazon.de', url: `https://www.amazon.de/dp/${asin}`, domain: 'amazon.de', flag: 'https://flagcdn.com/w20/de.png' }
];
let basePrice = null;
const createLoadingContainer = () => {
const priceElement = document.querySelector('.priceToPay, #priceblock_ourprice, #priceblock_dealprice');
if (priceElement) {
const container = document.createElement('div');
container.id = 'amazonPriceComparisonContainer';
container.style.marginTop = '20px';
container.style.padding = '10px';
container.style.backgroundColor = '#f9f9f9';
container.style.border = '1px solid #ccc';
container.style.borderRadius = '8px';
container.style.position = 'relative';
container.innerHTML = `<div id="loadingMessage" style="text-align: center; font-weight: bold;">Checking other Amazon sites...</div>`;
priceElement.parentNode.appendChild(container);
basePrice = getPriceFromPage(priceElement.textContent);
console.log(`Price found on Amazon.fr:`, basePrice);
}
};
const removeLoadingIndicator = () => {
const loadingMessage = document.getElementById('loadingMessage');
if (loadingMessage) {
loadingMessage.style.transition = 'opacity 1s';
loadingMessage.style.opacity = '0';
setTimeout(() => {
if (loadingMessage.parentNode) {
loadingMessage.parentNode.removeChild(loadingMessage);
}
displayAllResults();
}, 1000);
}
};
const getPriceFromPage = (priceText) => {
priceText = priceText.replace(/\s+/g, '');
const priceMatch = priceText.match(/\d+[\.,]\d{2}/);
if (priceMatch) {
return parseFloat(priceMatch[0].replace(',', '.'));
}
return null;
};
const getPriceFromResponse = (responseText) => {
// Try to extract price from specific Amazon.de HTML structure
const dePriceMatch = responseText.match(/<span class="a-price-whole">(\d+)<span class="a-price-decimal">[.,]<\/span><\/span><span class="a-price-fraction">(\d{2})<\/span>/);
if (dePriceMatch) {
return parseFloat(`${dePriceMatch[1]}.${dePriceMatch[2]}`); // Convert to numeric value
}
// Try to extract price from specific Amazon.it HTML structure
const itPriceMatch = responseText.match(/<span class="a-price aok-align-center reinventPricePriceToPayMargin priceToPay"[^>]*>.*?<span class="a-price-whole">(\d+)<span class="a-price-decimal">(.)<\/span><\/span><span class="a-price-fraction">(\d{2})<\/span>/);
if (itPriceMatch) {
return parseFloat(`${itPriceMatch[1]}.${itPriceMatch[3]}`); // Convert to numeric value
}
return null;
};
const getDeliveryPriceFromResponse = (responseText) => {
const deliveryMatch = responseText.match(/data-csa-c-delivery-price="[^"]*(\d+[\.,]\d{2})/);
if (deliveryMatch) {
return parseFloat(deliveryMatch[1].replace(',', '.'));
}
return null;
};
const addPriceToPage = (siteName, price, deliveryPrice, url, flag, percentageDifference, totalPercentageDifference) => {
const priceContainer = document.querySelector('#amazonPriceComparisonContainer');
if (!priceContainer) {
return;
}
const row = document.createElement('div');
row.className = 'comparison-row';
row.style.cursor = 'pointer';
row.onmouseover = () => row.style.backgroundColor = '#f1f1f1';
row.onmouseout = () => row.style.backgroundColor = 'inherit';
row.onclick = () => window.open(url, '_blank');
row.style.display = 'flex';
row.style.justifyContent = 'space-between';
row.style.padding = '5px 0';
row.style.borderBottom = '1px solid #ccc';
const flagCell = document.createElement('div');
flagCell.style.flex = '1';
flagCell.innerHTML = `<img src="${flag}" alt="${siteName} flag" style="vertical-align: middle; margin-right: 5px;"> ${siteName}`;
const priceCell = document.createElement('div');
priceCell.style.flex = '1';
priceCell.style.textAlign = 'center';
priceCell.innerHTML = `€${price.toFixed(2)}`;
const percentagePriceCell = document.createElement('div');
percentagePriceCell.style.flex = '1';
percentagePriceCell.style.textAlign = 'center';
const priceColor = percentageDifference > 0 ? 'red' : 'green';
percentagePriceCell.innerHTML = percentageDifference !== null ? `<span style="color: ${priceColor};">${percentageDifference > 0 ? '+' : ''}${percentageDifference.toFixed(2)}% (Δ€${(price - basePrice).toFixed(2)})</span>` : '-';
const deliveryCell = document.createElement('div');
deliveryCell.style.flex = '1';
deliveryCell.style.textAlign = 'center';
deliveryCell.innerHTML = deliveryPrice !== null ? `<img src="https://img.icons8.com/?size=100&id=12248&format=png&color=000000" width="20"/> €${deliveryPrice.toFixed(2)}` : '-';
const totalPrice = price + (deliveryPrice || 0);
const totalCell = document.createElement('div');
totalCell.style.flex = '1';
totalCell.style.textAlign = 'center';
totalCell.innerHTML = `<strong>€${totalPrice.toFixed(2)}</strong>`;
const percentageCell = document.createElement('div');
percentageCell.style.flex = '1';
percentageCell.style.textAlign = 'center';
const totalColor = totalPercentageDifference > 0 ? 'red' : 'green';
percentageCell.innerHTML = totalPercentageDifference !== null ? `<span style="color: ${totalColor};">${totalPercentageDifference > 0 ? '+' : ''}${totalPercentageDifference.toFixed(2)}% (Δ€${(totalPrice - basePrice).toFixed(2)})</span>` : '-';
row.appendChild(flagCell);
row.appendChild(priceCell);
row.appendChild(percentagePriceCell);
row.appendChild(deliveryCell);
row.appendChild(totalCell);
row.appendChild(percentageCell);
priceContainer.appendChild(row);
};
let priceResults = [];
const storePriceResult = (siteName, price, deliveryPrice, url, flag) => {
if (price !== null) {
priceResults.push({ siteName, price, deliveryPrice, url, flag });
}
};
const displayAllResults = () => {
const priceContainer = document.querySelector('#amazonPriceComparisonContainer');
if (!priceContainer) {
return;
}
priceContainer.innerHTML = ''; // Clear loading message and icon
const headerRow = document.createElement('div');
headerRow.className = 'comparison-row header-row';
headerRow.style.display = 'flex';
headerRow.style.justifyContent = 'space-between';
headerRow.style.padding = '5px 0';
headerRow.style.borderBottom = '2px solid #000';
headerRow.style.fontWeight = 'bold';
['Site', 'Price', 'Difference (Price %)', 'Delivery', 'Total', 'Difference (Total %)'].forEach(header => {
const headerCell = document.createElement('div');
headerCell.style.flex = '1';
headerCell.style.textAlign = 'center';
headerCell.textContent = header;
headerRow.appendChild(headerCell);
});
priceContainer.appendChild(headerRow);
if (priceResults.length > 0 && basePrice !== null) {
priceResults.forEach(result => {
const percentageDifference = ((result.price - basePrice) / basePrice) * 100;
const totalPrice = result.price + (result.deliveryPrice || 0);
const totalBasePrice = basePrice; // Assuming no delivery cost for Amazon.fr for simplicity
const totalPercentageDifference = ((totalPrice - totalBasePrice) / totalBasePrice) * 100;
addPriceToPage(result.siteName, result.price, result.deliveryPrice, result.url, result.flag, percentageDifference, totalPercentageDifference);
});
// Add footer with script info after the last row
const footer = document.createElement('div');
footer.style.textAlign = 'right';
footer.style.fontSize = '0.8em';
footer.style.color = '#666';
footer.style.marginTop = '10px';
footer.textContent = `European Price Checker for Amazon by bNj v${GM_info.script.version}`;
priceContainer.appendChild(footer);
} else {
priceContainer.innerHTML = '<div style="text-align: center;">No prices available</div>';
}
};
createLoadingContainer();
let sitesChecked = 0;
amazonSites.forEach(site => {
GM_xmlhttpRequest({
method: 'GET',
url: site.url,
headers: {
'User-Agent': 'Mozilla/5.0',
'Accept-Language': 'en-US,en;q=0.5'
},
onload: function(response) {
console.log(`Response from ${site.name}:`, response);
if (response.status === 200) {
const price = getPriceFromResponse(response.responseText);
const deliveryPrice = getDeliveryPriceFromResponse(response.responseText);
console.log(`Price found on ${site.name}:`, price);
console.log(`Delivery price found on ${site.name}:`, deliveryPrice);
storePriceResult(site.name, price, deliveryPrice, site.url, site.flag);
} else {
console.error(`Failed to fetch price from ${site.name}, status:`, response.status);
storePriceResult(site.name, null, null, site.url, site.flag);
}
sitesChecked++;
if (sitesChecked === amazonSites.length) {
removeLoadingIndicator();
}
},
onerror: function(error) {
console.error(`Error fetching price from ${site.name}:`, error);
storePriceResult(site.name, null, null, site.url, site.flag);
sitesChecked++;
if (sitesChecked === amazonSites.length) {
removeLoadingIndicator();
}
}
});
});
})();