AtCoder Submission Language Detector

Automatically detects the language used based on the information in the source code comments and selects it as the one to be submitted.

Version vom 28.07.2022. Aktuellste Version

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// ==UserScript==
// @name         AtCoder Submission Language Detector
// @namespace    https://twitter.com/KakurenboUni
// @version      1.0.1
// @description  Automatically detects the language used based on the information in the source code comments and selects it as the one to be submitted.
// @author       uni-kakurenbo
// @match        https://atcoder.jp/contests/*/tasks/*
// @match        https://atcoder.jp/contests/*/submit*
// @match        https://atcoder.jp/contests/*/custom_test*
// @license      MIT
// @supportURL   https://twitter.com/KakurenboUni
// ==/UserScript==

(async function () {
  "use strict";

  const DETECTION_REG_EXP = /#.*lang(?:uage)?:?(?<args>\s+[^\n\r*/#]+)/;

  await rendered();

  const $editor = $(".editor").data("editor").doc;
  const $plainTextarea = $(".plain-textarea");

  const $selectLanguage = $("#select-lang select");
  const $languageOptions = $selectLanguage[0].querySelectorAll("option");
  const languageOptions = [].map.call($languageOptions, ({ value, label, dataset: { mime } = {} }) => {
    return {
      id: value,
      label: label.toLowerCase() ?? "",
      code: mime?.toLowerCase().replaceAll(/^.+\/x?|src$/g, "") ?? "",
    };
  });

  $editor.on("change", updateLanguageSettings);
  $plainTextarea.on("input", updateLanguageSettings);
  document.addEventListener("paste", updateLanguageSettings);
  $("#input-open-file").on("change", () => { setTimeout(updateLanguageSettings, 0); });

  function updateLanguageSettings() {
    const sourceCode = getSourceCode();

    const languageInfomation = sourceCode.match(DETECTION_REG_EXP);
    if (!languageInfomation || !languageInfomation?.groups?.args) return;

    let languageSelectors = languageInfomation.groups.args?.trim().replace(/\s+/g, " ").split(" ");
    languageSelectors = languageSelectors.map((selector) => selector.toLowerCase());

    const selectedOption = languageOptions.find((option) => {
      return (
        languageSelectors.includes(option.id) ||
        languageSelectors.every((selector) => option.label.includes(selector)) ||
        languageSelectors.every((selector) => option.code.includes(selector))
      );
    });

    if (!selectedOption) return;

    $selectLanguage.val(selectedOption.id).trigger("change");
  }

  async function rendered() {
    let timer;
    await new Promise((resolve) => {
      observer();
      function observer() {
        if (typeof CodeMirror == "function") {
          resolve();
        }
        timer = setTimeout(observer, 10);
      }
    });
    clearTimeout(timer);
  }
})();