codanna 0.9.19

const EMAIL_REGEX = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
const PASSWORD_MIN_LENGTH = 8;

export function validateEmail(email) {
  if (!email || typeof email !== 'string') {
    return false;
  }
  return EMAIL_REGEX.test(email.trim());
}

export function validatePassword(password) {
  if (!password || typeof password !== 'string') {
    return { valid: false, errors: ['Password is required'] };
  }

  const errors = [];

  if (password.length < PASSWORD_MIN_LENGTH) {
    errors.push(`Password must be at least ${PASSWORD_MIN_LENGTH} characters`);
  }

  if (!/[A-Z]/.test(password)) {
    errors.push('Password must contain at least one uppercase letter');
  }

  if (!/[a-z]/.test(password)) {
    errors.push('Password must contain at least one lowercase letter');
  }

  if (!/[0-9]/.test(password)) {
    errors.push('Password must contain at least one number');
  }

  return {
    valid: errors.length === 0,
    errors,
  };
}

export function validateRequired(value, fieldName) {
  if (value === null || value === undefined || value === '') {
    return { valid: false, error: `${fieldName} is required` };
  }
  return { valid: true, error: null };
}

export function validateLength(value, { min, max }, fieldName) {
  const length = String(value).length;

  if (min !== undefined && length < min) {
    return { valid: false, error: `${fieldName} must be at least ${min} characters` };
  }

  if (max !== undefined && length > max) {
    return { valid: false, error: `${fieldName} must be at most ${max} characters` };
  }

  return { valid: true, error: null };
}