卢森堡电话号码：格式、区号和验证指南

// Example number validation implementation
const validateLuxembourgNumber = (phoneNumber) => {
  const patterns = {
    geographic: /^(?:35[013-9]\d{4,8}|[2457-9]\d{2,9})$/, // Matches landline numbers
    mobile: /^(?:6[269][18]\d{6}|7[189]\d{6})$/, // Matches mobile numbers
    tollFree: /^800\d{5}$/, // Matches toll-free numbers
    premium: /^90[015]\d{5}$/ // Matches premium-rate numbers
  };

  // Remove spaces, hyphens, and any international prefix
  const cleanNumber = phoneNumber.replace(/[\s-+]+/g, '');
  
  // Check against each pattern and return the type if found
  for (const [type, pattern] of Object.entries(patterns)) {
    if (pattern.test(cleanNumber)) {
      return type;
    }
  }

  return false; // Return false if no match is found
};


// Example usage and edge cases:
console.log(validateLuxembourgNumber("+352 621 123 456")); // Output: "mobile"
console.log(validateLuxembourgNumber("26 12 34 56")); // Output: "geographic"
console.log(validateLuxembourgNumber("80012345")); // Output: "tollFree"
console.log(validateLuxembourgNumber("+35290112345")); // Output: "premium"
console.log(validateLuxembourgNumber("1234")); // Output: false (too short)
console.log(validateLuxembourgNumber("123456789012")); // Output: false (too long)
console.log(validateLuxembourgNumber("5551234")); // Output: false (invalid prefix)

// Format international numbers
const formatInternational = (number) => 
     `+352 ${number.replace(/(\d{2})(?=\d)/g, '$1 ')}`;

// Example usage:
console.log(formatInternational("621123456")); // Output: "+352 62 11 23 456"

// Example error handling approach
try {
     const isValid = validateLuxembourgNumber(inputNumber);
     if (!isValid) {
       throw new Error('Invalid Luxembourg phone number format');
     }
     // Proceed with processing the valid number
} catch (error) {
     console.error(`Validation error: ${error.message}`);
     // Implement appropriate error handling logic, such as displaying an error message to the user or logging the error.
}