Express.js Code Snippets

function sanitizeFilename(filename) {
  // Remove the extension
  const nameWithoutExt = filename.replace(/\.[^/.]+$/, '')

  // Replace all non-alphanumeric characters with hyphens
  const sanitized = nameWithoutExt.replace(/[^a-zA-Z0-9]+/g, '-').replace(/^-+|-+$/g, '')

  return sanitized
}

// Example usage
const input = "Mahbub-hasan.Hira.jpg";
const result = sanitizeFilename(input);
console.log(result); // Output: Mahbub-hasan-Hira

const generateUsername = email =>
  email.split('@')[0].replace(/[^a-zA-Z0-9]/g, '') + '_' + Math.random().toString(36).slice(2, 6);

// Example
console.log(generateUsername('john.doe@example.com')); // output ==>  johndoe_ab3x