auth.js

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/**
 * Parse JWT token from localStorage
 * @returns {Object|null} Decoded JWT payload or null if invalid
 */
export function parseJwt(token) {
  if (!token) return null;
  try {
    const payload = token.split('.')[1];
    return JSON.parse(atob(payload.replace(/-/g, '+').replace(/_/g, '/')));
  } catch {
    return null;
  }
}
 
/**
 * Get current user's role from JWT
 * @returns {string} User role (admin, staff, msp, root) or empty string
 */
export function getUserRole() {
  const token = localStorage.getItem('token');
  const payload = parseJwt(token);
  return payload?.role || '';
}
 
/**
 * Check if current user is admin (admin, msp, or root)
 * @returns {boolean} True if user has admin privileges
 */
export function isAdmin() {
  const role = getUserRole();
  return role === 'admin' || role === 'msp' || role === 'root';
}
 
/**
 * Check if current user is staff
 * @returns {boolean} True if user is staff
 */
export function isStaff() {
  const role = getUserRole();
  return role === 'staff';
}