AtCoder Contest Standings with Twitter ID

Display Twitter IDs in contest standings.
Verzia zo dňa 12.06.2022. Pozri najnovšiu verziu.
Navštíviť stránky autora skriptu pre podporu, spýtať sa otázku, uverejniť recenziu, alebo nahlásiť skript.
Zalomiť riadky
// ==UserScript==
// @name        AtCoder Contest Standings with Twitter ID
// @namespace   https://twitter.com/KakurenboUni
// @version     1.0.0
// @match       https://atcoder.jp/contests/*/standings*
// @description Display Twitter IDs in contest standings.
// @author      uni-kakurenbo
// @license     MIT
// @supportURL  https://twitter.com/KakurenboUni
// ==/UserScript==

void function() {
    'use strict';
    const cache = new Map();
    const STORAGE_ID_PREFIX = "AtCoder-Standings-with-Twitter-ID"


    window.onload = async function() {
        await rendered();

        const $checkboxes = Array.from(document.querySelectorAll("div.checkbox"));

        const $newElement = document.createElement("div");

        $newElement.innerHTML = `<label><input id="checkbox-twitter" type="checkbox"> Twitter ID を表示</label>`;
        $newElement.className = "checkbox";

        $checkboxes[2].after($newElement);

        const $new_checkbox = document.querySelector("input#checkbox-twitter");
        $new_checkbox.checked = localStorage.getItem(`${STORAGE_ID_PREFIX}.enable`) === "true";

        setVisuality();

        if(isAvailable() && $new_checkbox.checked) display();
        $new_checkbox.addEventListener('click', ({ target : { checked } }) => {
            if(checked) display();
            else hide();
        });

        $checkboxes.at(-1).addEventListener("click", setVisuality);
        document.querySelectorAll(".standings-per-page").forEach(element => {
            element.addEventListener("click", setVisuality);
        })

        function isAvailable() {
            return +document.querySelector("a.standings-per-page.selected").textContent <= 50 || $checkboxes.at(-1).querySelector("input").checked
        }
        function setVisuality() {
            if(isAvailable()) $new_checkbox.disabled = false;
            else { $new_checkbox.checked = false; $new_checkbox.disabled = true; }
        }
    };
    function display() {
        const $usernames = document.querySelectorAll(".standings-rank + .standings-username .username")
        $usernames.forEach(async ($username) => {
            const username = $username.textContent;
            const existing = cache.get(username);
            let twitterId = "";
            if(existing) {
                twitterId = existing;
            } else {
                const response = await fetch($username.href);
                const row_text = await response.text();
                const twitterInfomation = row_text.match(/href='\/\/twitter.com\/(.*)'/);
                if(!twitterInfomation) return;
                twitterId = twitterInfomation[1];
                cache.set(username, twitterId)
            }
            const $span = document.createElement("span");
            $span.className = "twitter-link";
            $span.style["margin-left"] = "5px"
            $span.style["margin-right"] = "2px"
            $span.innerHTML = `<a href="https://twitter.com/@${twitterId}" target="_blank" rel="noopener noreferrer">@${twitterId}</a>`
            $username.after($span);
        })
        localStorage.setItem(`${STORAGE_ID_PREFIX}.enable`, true);
    }
    function hide() {
        const $targets = document.querySelectorAll(".twitter-link")
        $targets.forEach($target => $target.remove());
        localStorage.setItem(`${STORAGE_ID_PREFIX}.enable`, false);
    }

    async function rendered() {
        let timer;
        await new Promise((resolve) => {
            observer();
            function observer() {
                if(document.querySelector("div.checkbox")) {
                    resolve();
                }
                timer = setTimeout(observer, 10);
            };
        });
        clearTimeout(timer)
    }
}();