// ==UserScript==
// @name         JCR Journal Info download
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  Click a styled button to automatically collect journal data and download as CSV.
// @author       Your Name
// @match        https://jcr.clarivate.com/jcr/browse-journals
// @grant        none
// @license MIT
// @downloadURL https://update.greasyfork.icu/scripts/493522/JCR%20Journal%20Info%20download.user.js
// @updateURL https://update.greasyfork.icu/scripts/493522/JCR%20Journal%20Info%20download.meta.js
// ==/UserScript==

(function() {
    'use strict';

    // 初始化CSV字符串，并添加表头
    let csvContent = "Journal Name,Impact Factor,Quartile\n";

    // 递归函数，用于翻页并收集数据
    function collectDataAndNavigate() {
        // 获取当前页面的数据
        const journalNames = document.querySelectorAll('.table-cell-journalName');
        const impactFactors = document.querySelectorAll('.table-cell-jif2019');
        const quartiles = document.querySelectorAll('.table-cell-quartile');

        journalNames.forEach((journalNameElement, index) => {
            const journalName = journalNameElement.getAttribute('title');
            const impactFactor = impactFactors[index].getAttribute('title');
            const quartile = quartiles[index].textContent.trim();
            csvContent += `"${journalName}","${impactFactor}","${quartile}"\n`;
        });

        // 检查是否存在下一页按钮且未被禁用
        const nextPageButton = document.querySelector('.mat-paginator-navigation-next:not(.mat-button-disabled)');
        if (nextPageButton) {
            nextPageButton.click(); // 点击下一页按钮
            setTimeout(collectDataAndNavigate, 1000); // 等待页面加载后再次调用函数
        } else {
            // 没有更多页时，可以调用下载函数
            downloadCSV(csvContent, 'JournalData.csv');
        }
    }

    // 函数用于下载CSV文件
    function downloadCSV(csvContent, fileName) {
        const link = document.createElement("a");
        const blob = new Blob([csvContent], { type: 'text/csv;charset=utf-8;' });
        const url = URL.createObjectURL(blob);
        link.setAttribute("href", url);
        link.setAttribute("download", fileName);
        link.style.visibility = 'hidden';

        document.body.appendChild(link);
        link.click();
        document.body.removeChild(link);
    }

    // 创建并添加一个开始按钮到页面
    function addStartButton() {
        const button = document.createElement("button");
        button.textContent = "开始下载期刊数据";
        button.style.position = "fixed";
        button.style.top = "30px";
        button.style.right = "10px";
        button.style.zIndex = "1000";
        button.style.padding = "10px 20px"; // Larger padding for bigger button size
        button.style.fontSize = "16px"; // Larger font size
        button.style.backgroundColor = "#4CAF50"; // Green background color
        button.style.color = "white"; // White text color
        button.style.border = "none"; // No border
        button.style.borderRadius = "5px"; // Rounded corners

        button.addEventListener("click", function() {
            this.disabled = true;
            this.textContent = "Collecting, please wait...";
            collectDataAndNavigate();
        });

        document.body.appendChild(button);
    }

    // 在页面加载完毕后添加按钮
    window.addEventListener('load', addStartButton);
})();