AtCoder「競プロ典型 90 問」に解説タブを追加し、E869120さんがGitHubで公開されている問題の解説・想定ソースコードなどのリンクを表示します。
Mint
// ==UserScript==
// @name AtCoder Editorial for Typical90
// @namespace http://tampermonkey.net/
// @version 0.1.0
// @description AtCoder「競プロ典型 90 問」に解説タブを追加し、E869120さんがGitHubで公開されている問題の解説・想定ソースコードなどのリンクを表示します。
// @match https://atcoder.jp/contests/typical90*
// @require https://code.jquery.com/jquery-3.6.0.min.js
// @author hiro_hiro
// @license CC0
// @downloadURL
// @updateURL
// @supportURL
// @grant GM_addStyle
// ==/UserScript==
(async function () {
"use strict";
addTabContentStyles();
addEditorialTab();
const tasks = await fetchTasks(); // TODO: Use cache to reduce access to AtCoder.
addEditorialPage(tasks);
$(".nav-tabs a").click(function () {
changeTab($(this));
hideContentsOfPreviousPage();
return false;
});
// TODO: 「解説」ボタンをクリックしたら、該当する問題のリンクを表示できるようにする
})();
function addTabContentStyles() {
const tabContentStyles = `
.tabContent {
display: none;
}
.tabContent.active {
display: block;
}
`;
GM_addStyle(tabContentStyles);
}
// FIXME: Hard coding is not good.
function addEditorialTab() {
// See:
// https://api.jquery.com/before/
$("li.pull-right").before("<li><a href='#editorial-created-by-userscript'><span class='glyphicon glyphicon-book' style='margin-right:4px;' aria-hidden='true'></span>解説</a></li>");
}
// TODO: キャッシュを利用して、本家へのアクセスを少なくなるようにする
async function fetchTasks() {
const tbodies = await fetchTaskPage();
const tasks = new Object();
let taskCount = 1;
for (const [index, aTag] of Object.entries($(tbodies).find("a"))) {
// Ignore a-tags including task-id and "Submit".
if (index % 3 == 1) {
const taskId = String(taskCount).padStart(3, "0");
tasks[taskId] = [aTag.text, aTag.href];
taskCount += 1;
}
}
return tasks;
}
async function fetchTaskPage() {
// See:
// https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch
// https://developer.mozilla.org/en-US/docs/Web/API/Body/text
// https://developer.mozilla.org/ja/docs/Web/API/DOMParser
// https://api.jquery.com/each/
// http://dyn-web.com/tutorials/object-literal/properties.php#:~:text=Add%20a%20Property%20to%20an%20Existing%20Object%20Literal&text=myObject.,if%20it%20is%20a%20string).
const tbodies = await fetch("https://atcoder.jp/contests/typical90/tasks", {
method: "GET"
})
.then(response => {
return response.text()
})
.then(html => {
const parser = new DOMParser();
const doc = parser.parseFromString(html, "text/html");
const messages = doc.querySelector("#main-container > div.row > div:nth-child(2) > div > table > tbody");
return messages;
})
.catch(error => {
console.warn('Something went wrong.', error);
});
return tbodies;
}
function addEditorialPage(tasks) {
addTabContent();
const editorialId = "#editorial-created-by-userscript";
showHeader(editorialId);
addHorizontalRule(editorialId);
showDifficultyVotingAndUserCodes(editorialId);
let taskEditorialsDiv = addDiv("task-editorials", editorialId);
taskEditorialsDiv = "." + taskEditorialsDiv;
addEditorials(tasks, taskEditorialsDiv);
}
function addTabContent() {
const contestNavTabsId = document.getElementById("contest-nav-tabs");
// See:
// https://stackoverflow.com/questions/268490/jquery-document-createelement-equivalent
// https://blog.toshimaru.net/jqueryhidden-inputjquery/
$("<div>", {
class: "tabContent",
id: "editorial-created-by-userscript",
}).appendTo(contestNavTabsId);
}
function showHeader(tag) {
addHeader(
"<h2>", // heading_tag
"editorial-header", // className
"解説", // text
tag // parent_tag
);
}
function addHeader(heading_tag, className, text, parent_tag) {
$(heading_tag, {
class: className,
text: text,
}).appendTo(parent_tag);
}
function addHorizontalRule(tag) {
// See:
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/hr
$("<hr>", {
class: "",
}).appendTo(tag);
}
function showDifficultyVotingAndUserCodes(tag) {
addHeader(
"<h3>", // heading_tag
"difficulty-voting-and-user-codes", // className
"問題の難易度を投票する・ソースコードを共有する", // text
tag // parent_tag
);
$("<ul>", {
class: "spread-sheets-ul",
text: ""
}).appendTo(tag);
const spreadSheetUrl = "https://docs.google.com/spreadsheets/d/1GG4Higis4n4GJBViVltjcbuNfyr31PzUY_ZY1zh2GuI/edit#gid=";
const homeID = "0";
addSpreadSheetHomeURL(spreadSheetUrl + homeID);
const difficultyVotingID = "1593175261";
addDifficultyVotingURL(spreadSheetUrl + difficultyVotingID);
const taskGroups = [
["001", "023", spreadSheetUrl + "105162261"], // task start, task end, spread sheet id.
["024", "047", spreadSheetUrl + "1671161250"],
["048", "071", spreadSheetUrl + "671876031"],
["072", "090", spreadSheetUrl + "428850451"]
];
// See:
// https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach
taskGroups.forEach(
taskGroup => {
const taskStart = taskGroup[0];
const taskEnd = taskGroup[1];
const url = taskGroup[2];
addUserCodesURL(
taskStart,
taskEnd,
url
);
}
);
}
function addSpreadSheetHomeURL(url) {
$("<li>", {
class: "spread-sheet-home-li",
text: ""
}).appendTo(".spread-sheets-ul");
$("<a>", {
class: "spread-sheet-home-url",
href: url,
text: "目的",
target: "_blank",
rel: "noopener",
}).appendTo(".spread-sheet-home-li");
}
function addDifficultyVotingURL(url) {
$("<li>", {
class: "difficulty-voting-li",
text: ""
}).appendTo(".spread-sheets-ul");
$("<a>", {
class: "difficulty-voting-url",
href: url,
text: "問題の難易度を投票する",
target: "_blank",
rel: "noopener",
}).appendTo(".difficulty-voting-li");
}
function addUserCodesURL(taskStart, taskEnd, url) {
// See:
// https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Template_literals
$("<li>", {
class: `user-codes-${taskStart}-${taskEnd}-li`,
text: ""
}).appendTo(".spread-sheets-ul");
$("<a>", {
class: `user-codes-${taskStart}-${taskEnd}-url`,
href: url,
text: `ソースコード(${taskStart}〜${taskEnd})を見る・共有する`,
target: "_blank",
rel: "noopener",
}).appendTo(`.user-codes-${taskStart}-${taskEnd}-li`);
}
function addDiv(tagName, parentTag) {
$("<div>", {
class: tagName,
}).appendTo(parentTag);
return tagName;
}
function addEditorials(tasks, parentTag) {
const githubRepoUrl = "https://github.com/E869120/kyopro_educational_90/blob/main/";
const editorialsUrl = githubRepoUrl + "editorial/";
const codesUrl = githubRepoUrl + "sol/";
// See:
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice
const latestTaskId = Object.keys(tasks).slice(-1)[0];
// HACK: 公開当日分の問題についてはリンク切れを回避するため、解説・ソースコードの一覧を示すことで応急的に対処
// HACK: 問題によっては、複数の解説とソースコードが公開される日もある
// getMultipleEditorialUrlsIfNeeds()とgetMultipleCodeUrls()で、アドホック的に対処している
for (const [taskId, [taskName, taskUrl]] of Object.entries(tasks)) {
let taskEditorialDiv = addDiv(`task-${taskId}-editorial`, parentTag);
taskEditorialDiv = "." + taskEditorialDiv;
// See:
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/padStart
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/entries
// https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/String/split
showTaskName(taskId, `${taskId} - ${taskName}`, taskUrl, taskEditorialDiv);
if (taskId == latestTaskId) {
const message = "注: 閲覧する時間帯によっては、公式解説・想定ソースコードが公開されているかもしれません。しばらくお待ちください。";
const additionalUrl = "(一覧)";
addNote(message, taskEditorialDiv);
showEditorial(taskId, editorialsUrl, additionalUrl, taskEditorialDiv);
showCode(taskId, codesUrl, additionalUrl, taskEditorialDiv);
} else {
const additionalUrls = getMultipleEditorialUrlsIfNeeds(taskId);
// TODO: AtCoderの解説ページで図を表示できるようにする
for (const [index, additionalUrl] of Object.entries(additionalUrls)) {
const editorialUrl = editorialsUrl + taskId + additionalUrl + ".jpg";
showEditorial(taskId + additionalUrl, editorialUrl, additionalUrl, taskEditorialDiv);
}
const codeUrls = getMultipleCodeUrls(taskId);
// TODO: ソースコードをフォーマットされた状態で表示する
for (const [index, codeUrl] of Object.entries(codeUrls)) {
const editorialCodelUrl = codesUrl + taskId + codeUrl;
const [additionalUrl, language] = codeUrl.split(".");
showCode(taskId + additionalUrl, editorialCodelUrl, codeUrl, taskEditorialDiv);
}
}
}
}
function showTaskName(taskId, taskName, taskUrl, tag) {
const taskIdClass = `task-${taskId}`;
addHeader(
"<h3>", // heading_tag
taskIdClass, // className
taskName, // text
tag // parent_tag
);
$("<a>", {
class: `${`task-${taskId}-url`} small glyphicon glyphicon-new-window`,
href: taskUrl,
target: "_blank",
}).appendTo(`.${taskIdClass}`);
}
// TODO: 複数の解説資料がアップロードされた日があれば更新する
function getMultipleEditorialUrlsIfNeeds(taskId) {
// See:
// https://developer.mozilla.org/ja/docs/Web/JavaScript/Guide/Working_with_Objects
// https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Operators/Property_Accessors
// https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Operators/in
// タスク名: 解説ファイルの番号
// 0xx-yyy.jpgの0xxをキーに、-yyyを値としている
const multipleEditorialUrls = {
"005": ["-01", "-02", "-03"],
"011": ["-01", "-02"],
"017": ["-01", "-02", "-03"],
"023": ["-01", "-02", "-03", "-04"],
"029": ["-01", "-02"],
"035": ["-01", "-02", "-03"],
"041": ["-01", "-02", "-03"],
"047": ["-01", "-02"],
"053": ["-01", "-02", "-03", "-04"],
"059": ["-01", "-02", "-03"],
};
if (taskId in multipleEditorialUrls) {
return multipleEditorialUrls[taskId];
} else {
return [""]; // dummy
}
}
// TODO: 複数の想定コードがアップロードされた日があれば更新する
function getMultipleCodeUrls(taskId) {
// タスク名: ソースコードの番号と拡張子
// 0xx-yyy.langの0xxをキーに、-yyy.langを値としている
const multipleCodeUrls = {
"005": ["-01.cpp", "-02.cpp", "-03.cpp"],
"011": ["-01.cpp", "-02.cpp", "-03.cpp"],
"017": ["-01.cpp", "-02.cpp", "-03.cpp"],
"023": ["-01.cpp", "-02.cpp", "-03.cpp", "-04a.cpp", "-04b.cpp"],
"029": ["-01.cpp", "-02.cpp", "-03.cpp"],
"035": ["-01.cpp", "-02.cpp", "-03.cpp", "-04.cpp"],
"041": ["-01a.cpp", "-01b.cpp", "-02.cpp", "-03.cpp"],
"047": ["-01.cpp", "-02.cpp"],
"053": ["-01.cpp", "-02.cpp", "-03.cpp", "-04.cpp"],
"055": [".cpp", "-02.py", "-03.py"],
"059": ["-01.cpp", "-02.cpp"],
};
if (taskId in multipleCodeUrls) {
return multipleCodeUrls[taskId];
} else {
return [".cpp"];
}
}
function addNote(message, parent_tag) {
$("<p>", {
class: "no-editorial",
text: message,
}).appendTo(parent_tag);
}
function showEditorial(taskId, url, additionalUrl, tag) {
const ulClass = `editorial-${taskId}-ul`;
const liClass = `editorial-${taskId}-li`;
$("<ul>", {
class: ulClass,
text: ""
}).appendTo(tag);
$("<li>", {
class: liClass,
text: ""
}).appendTo(`.${ulClass}`);
$("<a>", {
class: `editorial-${taskId}-url`,
href: url,
text: `公式解説${additionalUrl}`,
target: "_blank",
rel: "noopener",
}).appendTo(`.${liClass}`);
}
function showCode(taskId, url, additionalUrl, tag) {
const ulClass = `editorial-${taskId}-code-ul`;
const liClass = `editorial-${taskId}-code-li`;
$("<ul>", {
class: ulClass,
text: ""
}).appendTo(tag);
$("<li>", {
class: liClass,
text: ""
}).appendTo(`.${ulClass}`);
$("<a>", {
class: `editorial-${taskId}-code-url`,
href: url,
text: `想定ソースコード${additionalUrl}`,
target: "_blank",
rel: "noopener",
}).appendTo(`.${liClass}`);
}
function addEditorialButtonToTaskPage() {
// See:
// https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelector
// https://developer.mozilla.org/en-US/docs/Web/API/Document/createElement
const editorialButton = document.createElement("a");
editorialButton.classList.add("btn", "btn-default", "btn-sm");
editorialButton.textContent = "解説";
const taskTitle = document.querySelector(".row > div > .h2");
if (taskTitle) {
taskTitle.appendChild(editorialButton);
return editorialButton;
} else {
return;
}
}
function changeTab(this_object) {
// See:
// https://api.jquery.com/parent/
// https://api.jquery.com/addClass/#addClass-className
// https://api.jquery.com/siblings/#siblings-selector
// https://api.jquery.com/removeClass/#removeClass-className
// https://www.design-memo.com/coding/jquery-tab-change
this_object.parent().addClass("active").siblings(".active").removeClass("active");
const tabContentsUrl = this_object.attr("href");
$(tabContentsUrl).addClass("active").siblings(".active").removeClass("active");
}
function hideContentsOfPreviousPage() {
// See:
// https://api.jquery.com/length/
// https://api.jquery.com/hide/
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for
// https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/String
const tagCount = $(".col-sm-12").length;
for (let index = 0; index < tagCount; index++) {
if (index != 0) {
$("#main-container > div.row > div:nth-child(" + String(index + 1) + ")").hide();
}
}
}