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增加返回列表按钮
// ==UserScript==
// @name GDFZOJ返回列表
// @version 1.3
// @description 增加返回列表按钮
// @author MlkMathew
// @match *://*.gdfzoj.com*/*
// @grant GM_setValue
// @grant GM_getValue
// @namespace https://greasyfork.org/users/1068192
// ==/UserScript==
(function() {
'use strict';
var webs=window.location.href,id='',str;
function get_last_id(nam){
var dig=1,res=0;
for(let i=nam.length-1;i>=0;i--)
{
if(nam[i]=='/'){
break;
}
res+=dig*(nam[i]-'0');
dig*=10;
}
return res;
}
function get(pid,tim){
if(tim>5){
return ;
}
$.get("http://www.gdfzoj.com:23380/exercise/"+pid,function(res){
console.clear();
console.log('exercise',pid,'success to catch data');
for(let i=0;i+6<res.length;i++)
{
if(res.substr(i,7)=='problem'){
var id='';
for(let j=i+8;j<res.length;j++)
{
if(res[j]=='"'){
break;
}
id+=res[j];
}
if(id==''){
continue;
}
GM_setValue(id,pid);
}
}
}).fail(function () {
get(pid,tim+1);
console.clear();
console.log('exercise',pid,'failed to catch data');
});
}
function get_exercise(num){
console.log('catch data number:',num);
for(let i=1;i<=num;i++)
{
get(i,0);
}
}
if(!webs.substr(7,webs.length-8).match('/')){
let but=document.createElement("a");
but.className="btn btn-primary btn";
but.textContent="爬取题单";
but.style.color="rgb(255,255,255)";
document.querySelector("#UOJnavbars > ul:nth-child(2) > li.nav-item.dropdown").insertAdjacentElement("beforebegin",but);
but.onclick=function(){
let txt=document.createElement("a");
txt.textContent="正在爬取数据中...";
but.insertAdjacentElement("afterend",txt);
setTimeout(()=>{
get_exercise(500);
console.clear();
console.log("success to catch data");
txt.remove();
},100);
}
return ;
}
const s=document.querySelectorAll('a');
if(webs.match('exercise')||webs.match('problems$')){
for(let i=0;i<s.length;i++)
{
if(s[i].href.match('problem/')){
GM_setValue(get_last_id(s[i].href),get_last_id(webs));
}
}
}
if(webs.match('problem/')&&(!webs.match('contest/'))){
var x;
const t=document.querySelectorAll('ul');
for(let i=0;i<t.length;i++)
{
if(t[i].role=='tablist'){
x=t[i];
}
}
var add=document.createElement("li");
add.className="nav-item";
var y;
for(let i=0;i<s.length;i++)
{
if(s[i].textContent==' 提交'){
y=s[i].cloneNode(true);
}
}
y.textContent=' 返回列表';
y.dataset.toggle='';
y.href="http://www.gdfzoj.com:23380/exercise/"+GM_getValue(get_last_id(webs)).toString();
add.insertAdjacentElement("beforeend",y);
x.insertAdjacentElement("beforeend",add);
}
})();