AtCoder Submission Notes

Add notes to AtCoder submissions
As of 03.03.2025. See ბოლო ვერსია.
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// ==UserScript==
// @name         AtCoder Submission Notes
// @namespace    https://greasyfork.org/users/your-username
// @version      1.4
// @description  Add notes to AtCoder submissions
// @author       zerozero-0-0
// @match        https://atcoder.jp/contests/*/submissions/me
// @grant        none
// @license MIT
// ==/UserScript==

(function () {
  "use strict";

  function getNoteKey(submissionId) {
    return `atcoder_note_${submissionId}`;
  }

  const table = document.querySelector("table");
  if (!table) return;

  // ヘッダーに「Note」列を追加（重複防止）
  const headerRow = table.querySelector("thead tr");
  if (headerRow && !headerRow.querySelector(".note-header")) {
    const noteHeader = document.createElement("th");
    noteHeader.textContent = "Note";
    noteHeader.className = "note-header";
    headerRow.appendChild(noteHeader);
  }

  // 各行に独立したメモ欄追加
  document.querySelectorAll("tbody tr").forEach((row) => {
    const link = row.querySelector('a[href*="/submissions/"]');
    if (!link) return;

    const submissionId = link.href.split("/").pop();
    const noteKey = getNoteKey(submissionId);

    const td = document.createElement("td");
    td.style.minWidth = "200px";

    const textarea = document.createElement("textarea");
    textarea.style.width = "100%";
    textarea.style.height = "50px";
    textarea.dataset.submissionId = submissionId; // 念のため識別用
    textarea.value = localStorage.getItem(noteKey) || "";

    textarea.addEventListener("input", (event) => {
      const target = event.target;
      localStorage.setItem(noteKey, target.value);
    });

    td.appendChild(textarea);
    row.appendChild(td);
  });
})();