// ==UserScript==
// @name         Edge商店下载zip插件
// @description  从Edge扩展商店获取zip格式的插件，用于安装到chrome上
// @namespace    Sency
// @author       Sency
// @version      1.0
// @match        http*://microsoftedge.microsoft.com/addons/*
// @grant        GM_xmlhttpRequest
// @grant        GM_download
// @connect      microsoft.com
// @run-at       document-idle
// @nocompat     Chrome
// ==/UserScript==

(function() {
    'use strict';
    //下载文件（GM_download会将后缀改回crx）
    function download(url, filename) {
        filename = filename.replace(/[\/:*?"<>|]/g, ''); //去除非法字符
        return new Promise((resolve, reject) => {
            GM_xmlhttpRequest({
                url: url,
                method: 'get',
                responseType: 'blob',
                overrideMimeType: 'application/zip', //不加这句脚本猫会自动安装
                onload: res => {
                    if (res.status === 200) {
                        const href = URL.createObjectURL(res.response);
                        const a = document.createElement('a');
                        a.href = href;
                        a.download = filename;
                        a.click();
                        URL.revokeObjectURL(href);
                        resolve();
                    } else {
                        reject(res.status);
                    }
                },
                onerror: () => reject('error')
            });
        });
    }
    //启用或禁用按钮
    function setButtonState(button, disabled, innerText) {
        button.disabled = disabled;
        button.style.setProperty('cursor', disabled ? 'not-allowed' : 'pointer', 'important');
        button.style.setProperty('opacity', disabled ? '0.3' : '1', 'important');
        button.innerText = innerText;
    }
    //替换下载按钮
    function replaceButton(button) {
        const extensionName = button.children[0].children[0].ariaLabel.slice(3); //插件名
        const crxId = button.id.slice(18, 50); //插件id
        button.innerHTML = '';
        setButtonState(button, false, '下载zip');
        button.addEventListener('click', e => {
            e.stopImmediatePropagation();
            setButtonState(button, true, '下载中');
            download(`https://edge.microsoft.com/extensionwebstorebase/v1/crx?response=redirect&acceptformat=crx3&x=id%3D${crxId}%26installsource%3Dondemand%26uc`, `${extensionName}.zip`)
                .then(() => setButtonState(button, false, '下载zip'))
                .catch(err => setButtonState(button, true, '下载失败'));
        }, true);
    }
    //监听获取下载按钮并替换
    function findAndReplaceButtons() {
        const buttons = document.querySelectorAll('[id^=getOrRemoveButton-]');
        buttons.forEach(replaceButton);
        const mutationObserver = window.MutationObserver || window.WebkitMutationObserver || window.MozMutationObserver;
        const observer = new mutationObserver(mutations => {
            for (let mutation of mutations) {
                for (let node of mutation.addedNodes) {
                    if (node instanceof Element) {
                        const btns = node.id.startsWith('getOrRemoveButton-') ? [node] : node.querySelectorAll('[id^=getOrRemoveButton-]');
                        btns.forEach(replaceButton);
                    }
                }
            }
        });
        observer.observe(document, {
            childList: true,
            subtree: true
        });
    }

    findAndReplaceButtons();
})();