cl-generate/src/lib/shares/loadingSpinner.js

A cross-platform CLI tool to generate NestJS clean architecture modules

const { COLORS } = require("../constants/index");

class LoadingSpinner {
  constructor() {
    this.spinner = ["⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"];
    this.index = 0;
    this.interval = null;
  }

  start(message) {
    process.stdout.write(
      `${COLORS.BLUE}${message} ${this.spinner[this.index]}${COLORS.NC}`
    );
    this.interval = setInterval(() => {
      this.index = (this.index + 1) % this.spinner.length;
      process.stdout.write(
        `\r${COLORS.BLUE}${message} ${this.spinner[this.index]}${COLORS.NC}`
      );
    }, 80);
    return this; // Return instance for chaining
  }

  stop() {
    if (this.interval) {
      clearInterval(this.interval);
      process.stdout.write("\r");
    }
  }
}

// Global function to handle loading with async operations
async function withLoading(message, operation) {
  const spinner = new LoadingSpinner();
  try {
    spinner.start(message);
    const result = await operation();
    spinner.stop();
    return result;
  } catch (error) {
    spinner.stop();
    throw error;
  }
}

module.exports = {
  LoadingSpinner,
  withLoading,
};