mebuki-page-state

めぶきちゃんねるでカタログ、またはスレッドにいる時にstateをアップデートしsubscriberに送信します

Tento skript by neměl být instalován přímo. Jedná se o knihovnu, kterou by měly jiné skripty využívat pomocí meta příkazu // @require https://update.greasyfork.org/scripts/552225/1688437/mebuki-page-state.js

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// ==UserScript==
// @name         mebuki-page-state
// @namespace    https://mebuki.moe/
// @version      0.1.6
// @description  めぶきちゃんねるでカタログ、またはスレッドにいる時にstateをアップデートしsubscriberに送信します
// @author       ame-chan
// @match        https://mebuki.moe/app*
// @license      MIT
// @run-at       document-idle
// ==/UserScript==
(function () {
  'use strict';
  class StateManager {
    listeners;
    state;
    /**
     * 初期状態を指定してインスタンスを作成する
     * @param {T} initialState 管理する状態の初期値
     */ constructor(initialState) {
      this.listeners = [];
      this.state = {
        ...initialState,
      };
    }
    /**
     * 現在の状態を取得する (Readonly)
     * @returns {Readonly<T>} 現在の状態オブジェクト
     */ getState() {
      return {
        ...this.state,
      };
    }
    /**
     * 状態を部分的に更新し、購読者に通知する
     * @param {Partial<T>} newState 更新したい状態のキーと値を持つオブジェクト
     * @returns {void}
     */ updateState(newState) {
      const oldState = this.state;
      this.state = {
        ...this.state,
        ...newState,
      };
      if (this.state !== oldState) {
        this.notifyListeners();
      }
    }
    /**
     * 状態の変更を購読する
     * @param {function(state): void} listener 状態変更時に呼び出すコールバック
     * @returns {function(): void} 購読解除用の関数
     */ subscribe(listener) {
      this.listeners.push(listener);
      return () => {
        this.listeners = this.listeners.filter((l) => l !== listener);
      };
    }
    /**
     * 購読者に現在の状態を通知する
     * @private
     * @returns {void}
     */ notifyListeners() {
      const currentState = this.getState();
      this.listeners.forEach((listener) => listener(currentState));
    }
  }
  const initialState = {
    isCatalogPage: false,
    isThreadPage: false,
    threadMessageCount: 0,
  };
  const stateManager = new StateManager(initialState);
  const updateState = () => {
    const threadMessageElms = document.querySelectorAll('.thread-messages > [id^="message-"]');
    const threadMessageCount = threadMessageElms.length;
    const isCatalogPage = /^\/app\/?$/.test(location.pathname);
    const currentState = stateManager.getState();
    if (threadMessageCount > 0) {
      if (
        !currentState.isThreadPage ||
        currentState.isCatalogPage ||
        currentState.threadMessageCount !== threadMessageCount
      ) {
        stateManager.updateState({
          isThreadPage: true,
          isCatalogPage: false,
          threadMessageCount,
        });
      }
    } else if (isCatalogPage) {
      if (currentState.isThreadPage || !currentState.isCatalogPage) {
        stateManager.updateState({
          isThreadPage: false,
          isCatalogPage: true,
          threadMessageCount: 0,
        });
      }
    } else {
      if (currentState.isThreadPage || currentState.isCatalogPage) {
        stateManager.updateState({
          isThreadPage: false,
          isCatalogPage: false,
          threadMessageCount: 0,
        });
      }
    }
  };
  const observer = new MutationObserver(updateState);
  updateState();
  observer.observe(document.body, {
    childList: true,
    subtree: true,
  });
  window.USER_SCRIPT_MEBUKI_STATE = {
    stateManager,
    subscribe: (listener) => stateManager.subscribe(listener),
    getState: () => stateManager.getState(),
  };
})();