JavaScriptモジュールを使ったプラグインシステムの構築方法

// math.js
export function add(a, b) {
  return a + b;
}

export function subtract(a, b) {
  return a - b;
}

// main.js
import { add, subtract } from './math.js';

console.log(add(2, 3)); // 5
console.log(subtract(5, 2)); // 3

// math.js
function add(a, b) {
  return a + b;
}

function subtract(a, b) {
  return a - b;
}

module.exports = { add, subtract };

// main.js
const math = require('./math.js');

console.log(math.add(2, 3)); // 5
console.log(math.subtract(5, 2)); // 3

// myPlugin.js
class MyPlugin {
  constructor(options) {
    this.options = options;
  }

  init() {
    console.log('Plugin initialized with options:', this.options);
  }

  execute() {
    console.log('Plugin executed');
  }
}

export default MyPlugin;

// main.js
import MyPlugin from './myPlugin.js';

const pluginOptions = {
  setting1: 'value1',
  setting2: 'value2'
};

const myPluginInstance = new MyPlugin(pluginOptions);
myPluginInstance.init();
myPluginInstance.execute();

// pluginManager.js
class PluginManager {
  constructor() {
    this.plugins = [];
  }

  register(pluginInstance) {
    this.plugins.push(pluginInstance);
    pluginInstance.init();
  }

  executeAll() {
    this.plugins.forEach(plugin => plugin.execute());
  }
}

export default PluginManager;

// main.js
import PluginManager from './pluginManager.js';
import MyPlugin from './myPlugin.js';

const pluginManager = new PluginManager();

const pluginOptions1 = { setting1: 'value1' };
const pluginOptions2 = { setting1: 'value2' };

const myPluginInstance1 = new MyPlugin(pluginOptions1);
const myPluginInstance2 = new MyPlugin(pluginOptions2);

pluginManager.register(myPluginInstance1);
pluginManager.register(myPluginInstance2);

pluginManager.executeAll();

// main.js
async function loadPlugin(pluginPath) {
  try {
    const module = await import(pluginPath);
    const pluginInstance = new module.default();
    pluginInstance.init();
    return pluginInstance;
  } catch (error) {
    console.error('Failed to load plugin:', error);
  }
}

// プラグインの読み込みと初期化
loadPlugin('./myPlugin.js').then(pluginInstance => {
  if (pluginInstance) {
    pluginInstance.execute();
  }
});

// pluginManager.js
class PluginManager {
  constructor() {
    this.plugins = [];
  }

  async loadAndRegister(pluginPath) {
    try {
      const module = await import(pluginPath);
      const pluginInstance = new module.default();
      this.register(pluginInstance);
    } catch (error) {
      console.error('Failed to load and register plugin:', error);
    }
  }

  register(pluginInstance) {
    this.plugins.push(pluginInstance);
    pluginInstance.init();
  }

  executeAll() {
    this.plugins.forEach(plugin => plugin.execute());
  }
}

export default PluginManager;

// main.js
import PluginManager from './pluginManager.js';

const pluginManager = new PluginManager();

// 複数のプラグインを動的に読み込み、登録する
const pluginPaths = ['./myPlugin.js', './anotherPlugin.js'];

pluginPaths.forEach(pluginPath => {
  pluginManager.loadAndRegister(pluginPath);
});

// 全てのプラグインを実行する
pluginManager.executeAll();

class PluginManager {
  constructor() {
    this.plugins = [];
  }

  register(pluginInstance) {
    this.plugins.push(pluginInstance);
    pluginInstance.init();
  }

  // その他のメソッドは省略
}

class PluginManager {
  // 既存のコード...

  update(pluginInstance, newOptions) {
    const index = this.plugins.indexOf(pluginInstance);
    if (index !== -1) {
      this.plugins[index].init(newOptions);
    }
  }
}

class PluginManager {
  // 既存のコード...

  unregister(pluginInstance) {
    this.plugins = this.plugins.filter(plugin => plugin !== pluginInstance);
  }
}

class PluginManager {
  constructor() {
    this.plugins = [];
    this.dependencies = new Map();
  }

  register(pluginInstance, dependencies = []) {
    this.plugins.push(pluginInstance);
    this.dependencies.set(pluginInstance, dependencies);
    this.resolveDependencies(pluginInstance);
    pluginInstance.init();
  }

  resolveDependencies(pluginInstance) {
    const dependencies = this.dependencies.get(pluginInstance);
    dependencies.forEach(dep => {
      if (!this.plugins.includes(dep)) {
        throw new Error(`Missing dependency: ${dep}`);
      }
    });
  }

  // その他のメソッドは省略
}

class PluginManager {
  constructor() {
    this.plugins = [];
    this.pluginStates = new Map();
  }

  register(pluginInstance) {
    this.plugins.push(pluginInstance);
    this.pluginStates.set(pluginInstance, 'active');
    pluginInstance.init();
  }

  deactivate(pluginInstance) {
    this.pluginStates.set(pluginInstance, 'inactive');
    pluginInstance.deactivate();
  }

  activate(pluginInstance) {
    this.pluginStates.set(pluginInstance, 'active');
    pluginInstance.activate();
  }

  // その他のメソッドは省略
}

class EventEmitter {
  constructor() {
    this.events = {};
  }

  on(event, listener) {
    if (!this.events[event]) {
      this.events[event] = [];
    }
    this.events[event].push(listener);
  }

  emit(event, ...args) {
    if (this.events[event]) {
      this.events[event].forEach(listener => listener(...args));
    }
  }
}

export default EventEmitter;

import EventEmitter from './eventEmitter.js';

class PluginManager extends EventEmitter {
  constructor() {
    super();
    this.plugins = [];
  }

  register(pluginInstance) {
    this.plugins.push(pluginInstance);
    pluginInstance.init();
    this.setupListeners(pluginInstance);
  }

  setupListeners(pluginInstance) {
    if (pluginInstance.events) {
      Object.keys(pluginInstance.events).forEach(event => {
        this.on(event, pluginInstance.events[event].bind(pluginInstance));
      });
    }
  }
}

export default PluginManager;

class MyPlugin {
  constructor(options) {
    this.options = options;
    this.events = {
      'event1': this.onEvent1,
      'event2': this.onEvent2
    };
  }

  init() {
    console.log('Plugin initialized with options:', this.options);
  }

  onEvent1(data) {
    console.log('Event1 received:', data);
  }

  onEvent2(data) {
    console.log('Event2 received:', data);
  }
}

export default MyPlugin;

// main.js
import PluginManager from './pluginManager.js';
import MyPlugin from './myPlugin.js';

const pluginManager = new PluginManager();

const pluginOptions = { setting1: 'value1' };
const myPluginInstance = new MyPlugin(pluginOptions);

pluginManager.register(myPluginInstance);

// イベントの発行
pluginManager.emit('event1', { some: 'data' });
pluginManager.emit('event2', { other: 'data' });

class MyPlugin {
  constructor(options) {
    this.options = options;
    this.dependencies = ['OtherPlugin'];
  }

  init() {
    console.log('MyPlugin initialized');
  }
}

export default MyPlugin;

class PluginManager {
  constructor() {
    this.plugins = [];
    this.pluginMap = new Map();
  }

  register(pluginInstance) {
    this.pluginMap.set(pluginInstance.constructor.name, pluginInstance);
    this.plugins.push(pluginInstance);
  }

  initAll() {
    this.plugins.forEach(plugin => {
      this.resolveDependencies(plugin);
      plugin.init();
    });
  }

  resolveDependencies(pluginInstance) {
    if (pluginInstance.dependencies) {
      pluginInstance.dependencies.forEach(dep => {
        const depInstance = this.pluginMap.get(dep);
        if (depInstance) {
          this.resolveDependencies(depInstance);
          if (!depInstance.initialized) {
            depInstance.init();
            depInstance.initialized = true;
          }
        } else {
          throw new Error(`Dependency ${dep} not found for plugin ${pluginInstance.constructor.name}`);
        }
      });
    }
  }
}

export default PluginManager;

class PluginManager {
  constructor() {
    this.plugins = [];
    this.pluginMap = new Map();
    this.initializingPlugins = new Set();
  }

  register(pluginInstance) {
    this.pluginMap.set(pluginInstance.constructor.name, pluginInstance);
    this.plugins.push(pluginInstance);
  }

  initAll() {
    this.plugins.forEach(plugin => {
      this.resolveDependencies(plugin);
      if (!plugin.initialized) {
        plugin.init();
        plugin.initialized = true;
      }
    });
  }

  resolveDependencies(pluginInstance) {
    if (pluginInstance.dependencies) {
      pluginInstance.dependencies.forEach(dep => {
        if (this.initializingPlugins.has(dep)) {
          throw new Error(`Circular dependency detected: ${dep} is already being initialized`);
        }
        const depInstance = this.pluginMap.get(dep);
        if (depInstance) {
          this.initializingPlugins.add(dep);
          this.resolveDependencies(depInstance);
          if (!depInstance.initialized) {
            depInstance.init();
            depInstance.initialized = true;
          }
          this.initializingPlugins.delete(dep);
        } else {
          throw new Error(`Dependency ${dep} not found for plugin ${pluginInstance.constructor.name}`);
        }
      });
    }
  }
}

export default PluginManager;

class MyPlugin {
  constructor(options) {
    this.options = options;
    this.dependencies = [{ name: 'OtherPlugin', version: '1.0.0' }];
  }

  init() {
    console.log('MyPlugin initialized');
  }
}

export default MyPlugin;

async function loadPlugin(pluginPath) {
  try {
    const module = await import(pluginPath);
    const pluginInstance = new module.default();
    pluginInstance.init();
    return pluginInstance;
  } catch (error) {
    console.error('Failed to load plugin:', error);
  }
}

// 特定のイベントが発生したときにプラグインを読み込む
document.getElementById('loadButton').addEventListener('click', () => {
  loadPlugin('./myPlugin.js').then(pluginInstance => {
    if (pluginInstance) {
      pluginInstance.execute();
    }
  });
});

class PluginManager {
  constructor() {
    this.plugins = [];
    this.pluginCache = new Map();
  }

  async loadAndRegister(pluginPath) {
    if (this.pluginCache.has(pluginPath)) {
      const pluginInstance = this.pluginCache.get(pluginPath);
      this.register(pluginInstance);
    } else {
      try {
        const module = await import(pluginPath);
        const pluginInstance = new module.default();
        this.pluginCache.set(pluginPath, pluginInstance);
        this.register(pluginInstance);
      } catch (error) {
        console.error('Failed to load and register plugin:', error);
      }
    }
  }

  register(pluginInstance) {
    this.plugins.push(pluginInstance);
    pluginInstance.init();
  }

  executeAll() {
    this.plugins.forEach(plugin => plugin.execute());
  }
}

export default PluginManager;

// 必要な機能のみを含む軽量プラグイン
class LightweightPlugin {
  constructor(options) {
    this.options = options;
  }

  init() {
    console.log('LightweightPlugin initialized with options:', this.options);
  }

  execute() {
    console.log('LightweightPlugin executed');
  }
}

export default LightweightPlugin;

class PluginManager {
  constructor() {
    this.plugins = [];
  }

  async register(pluginInstance) {
    this.plugins.push(pluginInstance);
    await pluginInstance.init();
  }

  async executeAll() {
    await Promise.all(this.plugins.map(plugin => plugin.execute()));
  }
}

export default PluginManager;

// 署名の検証例
function verifySignature(pluginCode, signature) {
  // 署名検証ロジック（例：公開鍵暗号を使用）
  return true; // 検証に成功した場合
}

async function loadPlugin(pluginPath, signature) {
  try {
    const pluginCode = await fetch(pluginPath).then(res => res.text());
    if (verifySignature(pluginCode, signature)) {
      const module = await import(pluginPath);
      const pluginInstance = new module.default();
      pluginInstance.init();
      return pluginInstance;
    } else {
      throw new Error('Invalid plugin signature');
    }
  } catch (error) {
    console.error('Failed to load plugin:', error);
  }
}

// サンドボックス化の例（例示的な擬似コード）
function runInSandbox(pluginCode) {
  const sandbox = createSandboxEnvironment();
  sandbox.run(pluginCode);
}

async function loadAndRunPlugin(pluginPath) {
  const pluginCode = await fetch(pluginPath).then(res => res.text());
  runInSandbox(pluginCode);
}

// プラグインの権限制御例
class MyPlugin {
  constructor(options) {
    this.options = options;
    this.permissions = ['readData'];
  }

  init() {
    if (this.hasPermission('readData')) {
      console.log('Reading data');
    } else {
      console.error('Permission denied');
    }
  }

  hasPermission(permission) {
    return this.permissions.includes(permission);
  }
}

export default MyPlugin;

// アップデートチェック例
async function checkForUpdates(pluginPath) {
  const response = await fetch(`${pluginPath}/version`);
  const latestVersion = await response.text();
  if (currentVersion !== latestVersion) {
    // アップデートロジック
  }
}

class ChatApp {
  constructor() {
    this.pluginManager = new PluginManager();
    this.messages = [];
  }

  sendMessage(message) {
    this.messages.push(message);
    this.pluginManager.emit('messageSent', message);
  }

  receiveMessage(message) {
    this.messages.push(message);
    this.pluginManager.emit('messageReceived', message);
  }

  registerPlugin(pluginPath) {
    this.pluginManager.loadAndRegister(pluginPath);
  }
}

const chatApp = new ChatApp();

class TranslationPlugin {
  constructor() {
    this.events = {
      'messageReceived': this.onMessageReceived
    };
  }

  init() {
    console.log('TranslationPlugin initialized');
  }

  async onMessageReceived(message) {
    const translatedMessage = await this.translate(message);
    console.log('Translated Message:', translatedMessage);
  }

  async translate(message) {
    // ここに翻訳APIを呼び出すロジックを追加
    // 例として固定の翻訳文を返す
    return `Translated: ${message}`;
  }
}

export default TranslationPlugin;

class MentionNotificationPlugin {
  constructor(options) {
    this.options = options;
    this.events = {
      'messageReceived': this.onMessageReceived
    };
  }

  init() {
    console.log('MentionNotificationPlugin initialized with options:', this.options);
  }

  onMessageReceived(message) {
    if (message.includes(this.options.mention)) {
      this.notify(this.options.mention, message);
    }
  }

  notify(user, message) {
    console.log(`Notification: ${user} was mentioned in message: "${message}"`);
  }
}

export default MentionNotificationPlugin;

import TranslationPlugin from './translationPlugin.js';
import MentionNotificationPlugin from './mentionNotificationPlugin.js';

const translationPlugin = new TranslationPlugin();
const mentionNotificationPlugin = new MentionNotificationPlugin({ mention: 'user123' });

chatApp.registerPlugin('./translationPlugin.js');
chatApp.registerPlugin('./mentionNotificationPlugin.js');

chatApp.sendMessage('Hello, how are you?');
chatApp.receiveMessage('Hello, user123!');

async function loadPlugins() {
  await chatApp.registerPlugin('./translationPlugin.js');
  await chatApp.registerPlugin('./mentionNotificationPlugin.js');
}

loadPlugins().then(() => {
  chatApp.sendMessage('Hello, world!');
  chatApp.receiveMessage('Hi, user123!');
});

// logPlugin.js
class LogPlugin {
  constructor() {
    this.events = {
      'messageSent': this.onMessageSent,
      'messageReceived': this.onMessageReceived
    };
  }

  init() {
    console.log('LogPlugin initialized');
  }

  onMessageSent(message) {
    console.log('Message sent:', message);
  }

  onMessageReceived(message) {
    console.log('Message received:', message);
  }
}

export default LogPlugin;

// messageFilterPlugin.js
class MessageFilterPlugin {
  constructor(options) {
    this.options = options;
    this.events = {
      'messageReceived': this.onMessageReceived
    };
  }

  init() {
    console.log('MessageFilterPlugin initialized with options:', this.options);
  }

  onMessageReceived(message) {
    if (message.includes(this.options.keyword)) {
      console.log(`Filtered message: "${message}" contains keyword "${this.options.keyword}"`);
    }
  }
}

export default MessageFilterPlugin;

// customEventPlugin.js
class CustomEventPlugin {
  constructor(options) {
    this.options = options;
    this.events = {
      [this.options.eventName]: this.onCustomEvent
    };
  }

  init() {
    console.log('CustomEventPlugin initialized with options:', this.options);
  }

  onCustomEvent(data) {
    console.log(`Custom event "${this.options.eventName}" triggered with data:`, data);
    console.log(this.options.message);
  }
}

export default CustomEventPlugin;

// languageSupportPlugin.js
class LanguageSupportPlugin {
  constructor() {
    this.languages = {
      en: 'English',
      es: 'Spanish'
    };
  }

  init() {
    console.log('LanguageSupportPlugin initialized');
  }

  getLanguageData() {
    return this.languages;
  }
}

export default LanguageSupportPlugin;

// translationPlugin.js
class TranslationPlugin {
  constructor() {
    this.dependencies = ['LanguageSupportPlugin'];
    this.events = {
      'messageReceived': this.onMessageReceived
    };
  }

  init() {
    console.log('TranslationPlugin initialized');
    this.languageSupport = this.dependencies['LanguageSupportPlugin'];
  }

  async onMessageReceived(message) {
    const translatedMessage = await this.translate(message);
    console.log('Translated Message:', translatedMessage);
  }

  async translate(message) {
    const languages = this.languageSupport.getLanguageData();
    // ここに翻訳ロジックを追加（例として固定の翻訳文を返す）
    return `Translated to ${languages.en}: ${message}`;
  }
}

export default TranslationPlugin;

// sandbox.js
export function runInSandbox(pluginCode) {
  const iframe = document.createElement('iframe');
  document.body.appendChild(iframe);
  const sandboxWindow = iframe.contentWindow;
  sandboxWindow.eval(pluginCode);
  // 必要な場合、sandboxWindowへのアクセス制限を追加
  document.body.removeChild(iframe);
}

// main.js
async function loadAndRunPluginInSandbox(pluginPath) {
  const pluginCode = await fetch(pluginPath).then(res => res.text());
  runInSandbox(pluginCode);
}

// 使用例
loadAndRunPluginInSandbox('./logPlugin.js');