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添加可以选择难度的随机跳题功能
// ==UserScript==
// @name 洛谷按难度随机跳题
// @version 0.1.5
// @description 添加可以选择难度的随机跳题功能
// @author C2020陈铭浩
// @match *://www.luogu.com.cn/
// @match *://www.luogu.com.cn/
// @namespace http://greasyfork.icu/zh-CN/users/370663-yezhiyi9670
// ==/UserScript==
(function () {
$('document').ready(function(){setTimeout(function () {
$sidebar = $('#app-old .lg-index-content .lg-right.am-u-lg-3');
$firstele = $($sidebar.children()[0]);
// console.log($firstele);
$finder = $(`
<div class="lg-article" id="rand-problem-form">
<h2>按难度随机跳题</h2>
<select class="am-form-field" style="background-color:#DDD;" name="rand-problem-rating" autocomplete="off" placeholder="选择难度">
<option value="0">暂无评定</option>
<option value="1">入门</option>
<option value="2">普及-</option>
<option selected value="3">普及/提高-</option>
<option value="4">普及+/提高</option>
<option value="5">提高+/省选-</option>
<option value="6">省选/NOI-</option>
<option value="7">NOI/NOI+/CTSC</option>
</select>
<select class="am-form-field" style="background-color:#DDD;margin-top:16px;" name="rand-problem-source" autocomplete="off" placeholder="选择来源">
<option selected value="P">洛谷题库</option>
<option value="CF">CodeForces</option>
<option value="SP">SPOJ</option>
<option value="AT">AtCoder</option>
<option value="UVA">UVa</option>
</select>
<button class="am-btn am-btn-sm am-btn-primary" style="margin-top:16px;visibility:hidden">跳转</button>
<button class="am-btn am-btn-sm am-btn-primary lg-right" id="rand-problem-button" style="margin-top:16px;">跳转</button>
</div>
`);
$finder.insertAfter($firstele);
$('#rand-problem-button').click(function() {
$('#rand-problem-button').addClass('am-disabled');
$.get("https://www.luogu.com.cn/problem/list?difficulty=" + $('[name=rand-problem-rating]')[0].value + "&type=" + $('[name=rand-problem-source]')[0].value + "&page=1&_contentOnly=1",
function (data) {
//var arr = eval('(' + data + ')');
var arr = data;
if (arr['code'] != 200) {
$('#rand-problem-button').removeClass('am-disabled');
show_alert("好像哪里有点问题", arr["message"]);
}
else {
// show_alert('调试','成功（题目数：'+arr['currentData']['problems']['count']+'）');
var problem_count = arr['currentData']['problems']['count'];
var page_count = Math.ceil(problem_count / 50);
var rand_page = Math.floor(Math.random()*page_count) + 1;
// show_alert('调试',rand_page+'/'+page_count);
$.get("https://www.luogu.com.cn/problem/list?difficulty=" + $('[name=rand-problem-rating]')[0].value + "&type=" + $('[name=rand-problem-source]')[0].value + "&page=" + rand_page + "&_contentOnly=1",
function(data) {
var list = data['currentData']['problems']['result'];
var rand_idx = Math.floor(Math.random()*list.length);
var pid = list[rand_idx]['pid'];
// show_alert('调试',pid);
location.href = "https://www.luogu.com.cn/problem/" + pid;
}
);
}
}
);
});
},499)});
})();