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WaniKani Answer Checker

Modifiable answer checker in reviews and lessons

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greasyfork.ip-ddns.com/scripts/470201/1215595/WaniKani%20Answer%20Checker.js 

// ==UserScript==
// @name         WaniKani Answer Checker
// @namespace    http://www.wanikani.com
// @version      0.1.0
// @description  Modifiable answer checker in reviews and lessons
// @author       polv
// @match        https://www.wanikani.com/*
// @match        https://preview.wanikani.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=wanikani.com
// @license      MIT
// @source       https://github.com/patarapolw/wanikani-userscript/blob/master/userscripts/answer-checker.user.js
// @grant        none
// ==/UserScript==

// @ts-check
/// <reference path="./types/answer-checker.d.ts" />
(function () {
  class ModAnswerChecker {
    /**
     * @type {TryEvaluationFunction[]}
     */
    mods = [];
    /**
     * @type {{
     *   oldEvaluate?: EvaluationFunction
     *   evaluate: EvaluationFunction
     * } | null}
     */
    answerChecker = null;

    /**
     *
     * @param {TryEvaluationFunction} fn
     */
    register(fn) {
      this.mods.push(fn);
    }

    constructor() {
      // Automatically init on new instance
      window.addEventListener('turbo:load', (e) => {
        // @ts-ignore
        const url = e.detail.url;
        if (!url) return;

        /**
         * e.g.
         * https://www.wanikani.com/subjects/lesson/quiz?queue=${subjectIds.join('-')}
         * https://www.wanikani.com/subjects/review
         * https://www.wanikani.com/subjects/extra_study?queue_type=${queueType}
         */
        if (/(session|quiz|review|extra_study)/.test(url)) {
          // @ts-ignore
          const Stimulus = window.Stimulus;
          if (!Stimulus) return;

          const startDate = +new Date();
          const intervalId = setInterval(() => {
            this.answerChecker =
              Stimulus.controllers.find((x) => {
                return x.answerChecker;
              })?.answerChecker || null;

            if (this.answerChecker) {
              clearInterval(intervalId);

              if (this.answerChecker.oldEvaluate) return;
              const answerChecker = this.answerChecker;

              console.log('Found new answerChecker');

              const oldEvaluate = answerChecker.evaluate.bind(answerChecker);
              answerChecker.oldEvaluate = oldEvaluate;

              /** @type {(fns: TryEvaluationFunction[]) => EvaluationFunction} */
              const evaluateWith = (fns) => {
                return (e) => {
                  for (const fn of fns) {
                    const r = fn(
                      e,
                      evaluateWith(fns.filter((it) => it !== fn)),
                    );
                    if (r) return r;
                  }
                  return oldEvaluate(e);
                };
              };

              answerChecker.evaluate = evaluateWith(this.mods);
            }

            if (startDate + 5000 < +new Date()) {
              clearInterval(intervalId);
            }
          }, 500);
        }
      });
    }
  }

  window.modAnswerChecker = window.modAnswerChecker || new ModAnswerChecker();
})();