// ==UserScript==
// @name        度盘文件列表、分享页面显示MD5
// @author      Crab
// @namespace   pan@baidu.com
// @description 百度网盘文件列表、分享页面显示分享文件的MD5值。
// @include     /^https?://(yun|pan)\.baidu\.com\/(s(hare)?|disk)\/*/
// @compatible  firefox 34+
// @compatible  Chrome 45+
// @version     0.1.1
// @grant       none
// @downloadURL none
// ==/UserScript==

(function(){
	'use strict';

	const {cache, yunData} = window;

	//单文件分享页MD5
	if(yunData && yunData.FILEINFO && yunData.FILEINFO.length === 1 &&
		yunData.FILEINFO[0].isdir !== 1 && yunData.FILEINFO[0].md5
	){
		let fTitle = document.querySelector('h2.file-name');
		if(fTitle){
			fTitle.parentNode.insertAdjacentHTML('beforeend',
			`<dl style="color:#aaa;font-size: 12px;">
					<dt style="float:left;">MD5:</dt>
					<dd style="padding-left: 3em;">${yunData.FILEINFO[0].md5}</dd>
			</dl>`);
		}
	}

	//文件列表MD5
	if(!cache || !cache.list || !cache.list.data){
		return;
	}

	document.head.appendChild(document.createElement('style')).textContent = `
		@keyframes bdFileMd5 {from{opacity:.9}to{opacity:1}}
		:not(.dir-small):not(.dir-large) 
			+ .file-name .text>a:not([data-md5]){animation:bdFileMd5 1ms}
		.file-name .text>a[data-md5]{position:relative; top: -6px;}
		[class*=fileicon] + .file-name .text>a[data-md5]::after, 
		.default-small + .file-name .text>a[data-md5]::after{
			position:absolute; content:'MD5: 'attr(data-md5);
			left: -80px; top: 2px; font-size: 95%; color: #aaa;
		}
	`;
	const dirSelector = '.FuIxtL>li:last-of-type, .module-toolbar+div>div>ul>li:last-of-type',
		div = document.createElement('div'),
		base = '/';
	let timeout, dir;

	addEventListener('animationstart', e => {
		if(e.animationName !== 'bdFileMd5')
			return;
		clearTimeout(timeout);
		timeout = setTimeout(() => {dir = null}, 1000);

		if(!dir){
			dir = document.querySelector(dirSelector);
			if(!dir) return;
			dir = dir.offsetParent ? dir.lastElementChild.title.substr(4) : base;
			if(cache.list.data[base]){
				let bPath = cache.list.data[base].list;
				if(bPath && bPath.length === 1 && bPath[0].isdir === 1){
					let p = bPath[0].path.split('/');
					if(p.length > 1){
						if(p[0] !== '') p.unshift('');
						p.pop();
						dir = p.join('/') + dir;
					}
				}
			}
		}

		if(!cache.list.data[dir] || !cache.list.data[dir].list)
			return;
		let targetName = e.target.textContent,
			fileInfo = cache.list.data[dir].list.find(file => {
			div.innerHTML = file.path.split('/').pop();
			return div.textContent === targetName;
		});
		if(fileInfo){
			e.target.dataset.md5 = fileInfo.md5;
		}
	});
})();