Asking Claude to write Hello World

hello-world.js

// I asked Claude to write Hello World. Then I continually asked it to extract new classes until we got the below.
// Introducing the world's most complicated Hello World program.

class Printable {
  toString() {
    throw new Error('toString() method must be implemented');
  }
}

class MessageCreator {
  createMessage() {
    throw new Error('createMessage() method must be implemented');
  }
}

class MessageCreatorFactory {
  createMessageCreator() {
    throw new Error('createMessageCreator() method must be implemented');
  }
}

class TextMessageCreatorFactory extends MessageCreatorFactory {
  createMessageCreator(text) {
    return new TextMessageCreator(text);
  }
}

class Logger {
  log(message) {
    throw new Error('log() method must be implemented');
  }
}

class ConsoleLogger extends Logger {
  log(message) {
    console.log(message);
  }
}

class FileLogger extends Logger {
  constructor(filePath) {
    super();
    this.filePath = filePath;
  }

  log(message) {
    // Code to log the message to a file at the specified file path
    // (implementation omitted for brevity)
  }
}

class LoggerFactory {
  createLogger() {
    throw new Error('createLogger() method must be implemented');
  }
}

class ConsoleLoggerFactory extends LoggerFactory {
  createLogger() {
    return new ConsoleLogger();
  }
}

class FileLoggerFactory extends LoggerFactory {
  constructor(filePath) {
    super();
    this.filePath = filePath;
  }

  createLogger() {
    return new FileLogger(this.filePath);
  }
}

class LoggingService {
  constructor(logger) {
    this.logger = logger;
  }

  log(printable) {
    this.logger.log(printable.toString());
  }
}

class TextMessageCreator extends MessageCreator {
  constructor(text) {
    super();
    this.text = text;
  }

  createMessage() {
    return new Message(this.text);
  }
}

class Message extends Printable {
  constructor(text) {
    super();
    this.text = text;
  }

  toString() {
    return this.text;
  }

  toGreeting() {
    return new Greeting(this);
  }
}

class Greeting extends Printable {
  constructor(message) {
    super();
    this.message = message;
  }

  toString() {
    return this.message.toString();
  }
}

class GreetingService {
  constructor(loggingService, greetingFormatter) {
    this.loggingService = loggingService;
    this.greetingFormatter = greetingFormatter;
  }

  greet(greeting) {
    const formattedGreeting = this.greetingFormatter.format(greeting);
    this.loggingService.log(formattedGreeting);
  }
}

class GreetingServiceFactory {
  createGreetingService(loggingService, greetingFormatter) {
    return new GreetingService(loggingService, greetingFormatter);
  }
}

class GreetingFormatter {
  format(greeting) {
    return greeting.toString();
  }
}

class UppercaseGreetingFormatter extends GreetingFormatter {
  format(greeting) {
    return greeting.toString().toUpperCase();
  }
}

class MessageFormatterFactory {
  createMessageFormatter() {
    throw new Error('createMessageFormatter() method must be implemented');
  }
}

class UppercaseMessageFormatterFactory extends MessageFormatterFactory {
  createMessageFormatter() {
    return new UppercaseGreetingFormatter();
  }
}

class GreetingDecorator {
  constructor(greeting) {
    this.greeting = greeting;
  }

  toString() {
    return this.decorate(this.greeting.toString());
  }

  decorate(greetingString) {
    throw new Error('decorate() method must be implemented');
  }
}

class EmojiGreetingDecorator extends GreetingDecorator {
  decorate(greetingString) {
    return `😊 ${greetingString} 😊`;
  }
}

class MessageDecoratorFactory {
  createMessageDecorator(greeting) {
    throw new Error('createMessageDecorator() method must be implemented');
  }
}

class EmojiMessageDecoratorFactory extends MessageDecoratorFactory {
  createMessageDecorator(greeting) {
    return new EmojiGreetingDecorator(greeting);
  }
}

class GreetingObserver {
  onGreetingSent(greeting) {
    console.log(`Greeting sent: ${greeting}`);
  }
}

class GreetingCommand {
  constructor(greeter, text) {
    this.greeter = greeter;
    this.text = text;
  }

  execute() {
    this.greeter.greet(this.text);
  }
}

class Greeter {
  constructor(greetingService, messageCreatorFactory) {
    this.greetingService = greetingService;
    this.messageCreatorFactory = messageCreatorFactory;
    this.observers = [];
  }

  addObserver(observer) {
    this.observers.push(observer);
  }

  removeObserver(observer) {
    const index = this.observers.indexOf(observer);
    if (index !== -1) {
      this.observers.splice(index, 1);
    }
  }

  notifyObservers(greeting) {
    for (const observer of this.observers) {
      observer.onGreetingSent(greeting);
    }
  }

  greet(text) {
    const messageCreator = this.messageCreatorFactory.createMessageCreator(text);
    const message = messageCreator.createMessage();
    const greeting = message.toGreeting();
    const decoratedGreeting = new EmojiGreetingDecorator(greeting);
    this.greetingService.greet(decoratedGreeting);
    this.notifyObservers(decoratedGreeting.toString());
  }
}

class GreeterFactory {
  createGreeter(greetingService, messageCreatorFactory) {
    return new Greeter(greetingService, messageCreatorFactory);
  }
}

// Additional classes for reusability and code quality

class GreetingRepository {
  constructor() {
    this.greeting = 'Hello, World!';
  }

  getGreeting() {
    return this.greeting;
  }
}

class GreetingValidator {
  isValid(greeting) {
    return typeof greeting === 'string' && greeting.trim().length > 0;
  }
}

class GreetingCache {
  constructor() {
    this.cache = new Map();
  }

  getGreeting(key) {
    return this.cache.get(key);
  }

  setGreeting(key, greeting) {
    this.cache.set(key, greeting);
  }
}

class GreetingBuilder {
  constructor() {
    this.parts = [];
  }

  append(part) {
    this.parts.push(part);
    return this;
  }

  build() {
    return this.parts.join(' ');
  }
}

class GreetingDirector {
  constructor(builder) {
    this.builder = builder;
  }

  constructStandardGreeting() {
    return this.builder.append('Hello,').append('World!').build();
  }
}

class GreetingProxy {
  constructor(greeter) {
    this.greeter = greeter;
  }

  greet(text) {
    console.log('Before greeting');
    this.greeter.greet(text);
    console.log('After greeting');
  }
}
// ... (previous code remains the same)

class GreetingStrategy {
  greet(greeting) {
    throw new Error('greet() method must be implemented');
  }
}

class SimpleGreetingStrategy extends GreetingStrategy {
  greet(greeting) {
    console.log(greeting);
  }
}

class EntusiasticGreetingStrategy extends GreetingStrategy {
  greet(greeting) {
    console.log(`${greeting}!!!`);
  }
}

class GreetingContext {
  constructor(strategy) {
    this.strategy = strategy;
  }

  setStrategy(strategy) {
    this.strategy = strategy;
  }

  greet(greeting) {
    this.strategy.greet(greeting);
  }
}

class GreetingTemplate {
  constructor(greeting) {
    this.greeting = greeting;
  }

  render() {
    return this.greeting;
  }
}

class GreetingTemplateFactory {
  createTemplate(greeting) {
    return new GreetingTemplate(greeting);
  }
}

class GreetingMediator {
  constructor() {
    this.colleagues = [];
  }

  addColleague(colleague) {
    this.colleagues.push(colleague);
  }

  sendGreeting(greeting) {
    for (const colleague of this.colleagues) {
      colleague.receiveGreeting(greeting);
    }
  }
}

class GreetingColleague {
  constructor(mediator) {
    this.mediator = mediator;
  }

  sendGreeting(greeting) {
    this.mediator.sendGreeting(greeting);
  }

  receiveGreeting(greeting) {
    console.log(`Received greeting: ${greeting}`);
  }
}

// Usage example
const consoleLoggerFactory = new ConsoleLoggerFactory();
const consoleLogger = consoleLoggerFactory.createLogger();
const loggingService = new LoggingService(consoleLogger);
const textMessageCreatorFactory = new TextMessageCreatorFactory();
const uppercaseMessageFormatterFactory = new UppercaseMessageFormatterFactory();
const greetingFormatter = uppercaseMessageFormatterFactory.createMessageFormatter();
const greetingServiceFactory = new GreetingServiceFactory();
const greetingService = greetingServiceFactory.createGreetingService(loggingService, greetingFormatter);
const greeterFactory = new GreeterFactory();
const greeter = greeterFactory.createGreeter(greetingService, textMessageCreatorFactory);

const greetingObserver = new GreetingObserver();
greeter.addObserver(greetingObserver);

const greetingRepository = new GreetingRepository();
const greetingValidator = new GreetingValidator();
const greetingCache = new GreetingCache();

const greetingBuilder = new GreetingBuilder();
const greetingDirector = new GreetingDirector(greetingBuilder);
const greeting = greetingDirector.constructStandardGreeting();

if (greetingValidator.isValid(greeting)) {
  const cachedGreeting = greetingCache.getGreeting(greeting);
  if (cachedGreeting) {
    console.log(`Using cached greeting: ${cachedGreeting}`);
  } else {
    const greetingProxy = new GreetingProxy(greeter);
    greetingProxy.greet(greeting);
    greetingCache.setGreeting(greeting, greeting);
  }

  const simpleGreetingStrategy = new SimpleGreetingStrategy();
  const entusiasticGreetingStrategy = new EntusiasticGreetingStrategy();
  const greetingContext = new GreetingContext(simpleGreetingStrategy);
  greetingContext.greet(greeting);
  greetingContext.setStrategy(entusiasticGreetingStrategy);
  greetingContext.greet(greeting);

  const greetingTemplateFactory = new GreetingTemplateFactory();
  const greetingTemplate = greetingTemplateFactory.createTemplate(greeting);
  console.log(greetingTemplate.render());

  const greetingMediator = new GreetingMediator();
  const colleague1 = new GreetingColleague(greetingMediator);
  const colleague2 = new GreetingColleague(greetingMediator);
  greetingMediator.addColleague(colleague1);
  greetingMediator.addColleague(colleague2);
  colleague1.sendGreeting(greeting);
} else {
  console.log('Invalid greeting');
}