A user script to check if the wishlist item has best price
当前为
// ==UserScript==
// @name Wishlist Steal Deal Checker
// @namespace https://greasyfork.org/en/users/1019658-aayush-dutt
// @version 0.4
// @description A user script to check if the wishlist item has best price
// @author aayushdutt
// @match https://www.amazon.com/hz/wishlist/ls/*
// @match https://www.amazon.in/hz/wishlist/ls/*
// @match https://www.amazon.de/hz/wishlist/ls/*
// @match https://www.amazon.fr/hz/wishlist/ls/*
// @match https://www.amazon.it/hz/wishlist/ls/*
// @match https://www.amazon.es/hz/wishlist/ls/*
// @match https://www.amazon.nl/hz/wishlist/ls/*
// @match https://www.amazon.se/hz/wishlist/ls/*
// @match https://www.amazon.co.jp/hz/wishlist/ls/*
// @match https://www.amazon.co.uk/hz/wishlist/ls/*
// @match https://www.amazon.com.mx/hz/wishlist/ls/*
// @match https://www.amazon.com.au/hz/wishlist/ls/*
// @match https://www.amazon.com.be/hz/wishlist/ls/*
// @grant none
// @link https://greasyfork.org/en/scripts/468955-wishlist-steal-deal-checker
// @license MIT
// ==/UserScript==
(function () {
"use strict";
/**
* Retrieves all nodes matching the specified selector.
* @returns {HTMLElement[]} An array of nodes.
*/
const getAllNodes = () => {
return Array.from(document.querySelectorAll("ul#g-items > li[data-id]"));
};
/**
* Parses the nodes and extracts relevant information.
* @returns {Object[]} An array of parsed node objects.
*/
const parseNodes = () => {
/**
* Retrieves the price attribute value from the given node.
* @param {HTMLElement} node - The node element.
* @returns {number} The price value.
*/
const getPrice = (node) => {
return parseInt(node.getAttribute("data-price"));
};
/**
* Retrieves the comment node associated with the given node.
* @param {HTMLElement} node - The node element.
* @returns {HTMLElement|null} The comment node or null if not found.
*/
const getCommentNode = (node) => {
return node.querySelector(
'span[data-csa-c-element-id="list-desktop-wishlist-item-info-cqp-comment"]'
);
};
/**
* Extracts the comment prices from the comment node.
* @param {HTMLElement|null} node - The comment node.
* @returns {number[]} An array of comment prices.
*/
const getCommentPrices = (node) => {
const commentText = node ? node.innerText.trim() : "";
if (!commentText) return [];
return commentText.split(" ").map((e) => parseInt(e));
};
/**
* Checks if the given price is the best price among the comment prices.
* @param {number} price - The price to compare.
* @param {number[]} commentPrices - An array of comment prices.
* @returns {number} -1 if bad price, 0 if equal to prev best, 1 if the price beats all comment prices
*/
const getIsBestPrice = (price, commentPrices) => {
if (!commentPrices || !commentPrices.length || !price) return false;
const minCommentPrice = Math.min(...commentPrices);
if (price === minCommentPrice) {
return 0;
}
if (price > minCommentPrice) return -1;
if (price < minCommentPrice) return 1;
};
const nodes = getAllNodes();
return nodes.map((node) => {
const price = getPrice(node);
const commentNode = getCommentNode(node);
const commentPrices = getCommentPrices(commentNode);
const priceComparison = getIsBestPrice(price, commentPrices);
return {
node,
price,
commentPrices,
priceComparison,
commentNode,
};
});
};
/**
* Updates the style of the best price nodes.
* @param {Object[]} wishlistItems - An array of wishlist items.
*/
const updateBestNodes = (wishlistItems) => {
wishlistItems.forEach((item) => {
if (item.priceComparison === 0) {
// Equal to prev best
item.node.style.background = "#f1fffe";
} else if (item.priceComparison === 1) {
// Better than prev best
item.node.style.background = "#d0fbe4";
}
});
};
const targetNode = document.getElementById("g-items");
const config = { childList: true };
/**
* The mutation callback function.
* @param {MutationRecord[]} mutationList - The list of mutations.
* @param {MutationObserver} observer - The MutationObserver instance.
*/
const callback = (mutationList, observer) => {
console.log("[Wishlist Steal Deal Checker] list changed");
const wishlistItems = parseNodes();
updateBestNodes(wishlistItems);
};
callback([], null);
const observer = new MutationObserver(callback);
observer.observe(targetNode, config);
})();