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function validateItalianPhoneNumber(phoneNumber) { // Remove any non-digit characters from the phone number const cleanedPhoneNumber = phoneNumber.replace(/\D/g, ''); // Check if the number starts with "+39" and transform it to "0039" if (cleanedPhoneNumber.startsWith('39')) { return '0039' + cleanedPhoneNumber.slice(2); // Return the corrected number } // Check if the number starts with "0039" if (!cleanedPhoneNumber.startsWith('0039')) { // If not, add "0039" to the beginning return '0039' + cleanedPhoneNumber; // Return the corrected number } // Return the original number if it already conforms to the correct format return cleanedPhoneNumber; } function validateAndCorrectPhoneNumber(phoneNumber) { const cleanedPhoneNumber = validateItalianPhoneNumber(phoneNumber); // Check if the cleaned number contains non-digits or has an incorrect number of digits if (!/^\d{10}$/.test(cleanedPhoneNumber)) { throw new Error('Invalid Italian phone number'); } return cleanedPhoneNumber; }
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