Click [Tasks] tab to open a drop-down list linked to each task.
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// ==UserScript==
// @name AtCoder Listing Tasks
// @namespace https://github.com/luuguas/AtCoderListingTasks
// @version 1.0
// @description Click [Tasks] tab to open a drop-down list linked to each task.
// @description [問題]タブをクリックすると、各問題へのリンクをドロップダウンリストで表示します。
// @author luuguas
// @license Apache
// @match https://atcoder.jp/contests/*
// @exclude https://atcoder.jp/contests/
// @exclude https://atcoder.jp/contests/archive
// @grant none
// ==/UserScript==
(function() {
'use strict';
const contest_url = 'https://atcoder.jp/contests/';
const unique_tag = 'user-script-listing-tasks';
//[問題]タブに本UserScript用のidを追加(タブがなければfalseを返す)
function AttachId(){
let tabs = document.getElementById('contest-nav-tabs');
if(tabs === null){
return false;
}
let tasks_tab = tabs.querySelector('a[href$="tasks"]');
if(tasks_tab === null){
return false;
}
else{
tasks_tab.setAttribute('id', unique_tag);
return true;
}
}
//[提出結果]タブと同様のドロップダウンリストに変える(中身は空)
function Togglize(){
let tasks_tab = document.getElementById(unique_tag);
let attr = {
'class': 'dropdown-toggle',
'data-toggle': 'dropdown',
'href': '#',
'role:': 'button',
'aria-haspopup': 'true',
'aria-expanded': 'false',
};
for(let [key, value] of Object.entries(attr)){
tasks_tab.setAttribute(key, value);
}
let caret = document.createElement('span');
caret.className = 'caret';
tasks_tab.appendChild(caret);
let dropdown_menu = document.createElement('ul');
dropdown_menu.className = 'dropdown-menu';
tasks_tab.parentNode.appendChild(dropdown_menu);
}
//リストを追加する
function AddList(){
let url = location.href;
let contest_name = url.split('/')[4];
let tasks_tab_li = document.getElementById(unique_tag).parentNode;
let dropdown_menu = tasks_tab_li.querySelector('.dropdown-menu');
//[問題一覧]の追加
let all_tasks = document.createElement('li');
let lang = document.querySelector('meta[http-equiv="Content-Language"]');
if(lang !== null && lang.getAttribute('content') === 'en'){
all_tasks.innerHTML = '<a href="' + contest_url + contest_name + '/tasks"><span class="glyphicon glyphicon-list" aria-hidden="true"></span> All Tasks</a>';
}
else{
all_tasks.innerHTML = '<a href="' + contest_url + contest_name + '/tasks"><span class="glyphicon glyphicon-list" aria-hidden="true"></span> 問題一覧</a>';
}
dropdown_menu.appendChild(all_tasks);
//分割線の追加
let divider = document.createElement('li');
divider.className = 'divider';
dropdown_menu.appendChild(divider);
//https://atcoder.jp/contests/***/tasks から問題のリストを抽出
let xhr = new XMLHttpRequest();
xhr.responseType = 'document';
xhr.onreadystatechange = function(){
let tasks_tab_li = document.getElementById(unique_tag).parentNode;
let dropdown_menu = tasks_tab_li.querySelector('.dropdown-menu');
if(xhr.readyState === 4){
if(xhr.status === 200){
let result = xhr.responseXML;
let problem_node = result.querySelector('#contest-nav-tabs + .col-sm-12');
let problem_list = problem_node.querySelectorAll('table.table tbody tr');
//問題情報を抽出
let list = [];
for(let li of problem_list){
let td = li.querySelectorAll('td');
let problem_url = td[0].firstChild.getAttribute('href');
let problem_diff = td[0].firstChild.textContent;
let problem_name = td[1].firstChild.textContent;
list.push({
url: problem_url,
diff: problem_diff,
name: problem_name,
});
}
//リストを追加
for(let data of list){
let li = document.createElement('li');
let a = document.createElement('a');
a.setAttribute('href', data.url);
a.textContent = data.diff + ' - ' + data.name;
li.appendChild(a);
dropdown_menu.appendChild(li);
}
console.log('[AtCoder Listing Tasks] Succeeded!');
}
else{
let li = document.createElement('li');
let a = document.createElement('a');
a.setAttribute('href', 'javascript:void(0)');
a.textContent = '(読み込み失敗)';
li.appendChild(a);
dropdown_menu.appendChild(li);
console.log('[AtCoder Listing Tasks] Failed...');
}
}
};
xhr.open('GET', 'https://atcoder.jp/contests/' + contest_name + '/tasks', true);
xhr.send(null);
}
let tab_exist = AttachId();
if(!tab_exist){
//タブがない場合は終了
console.log('[AtCoder Listing Tasks] [Tasks] Tab isn\'t exist.');
return;
}
Togglize();
AddList();
})();