How to Generate the First Six Letters of Codice Fiscale

Alright, so let’s break this down together! The codice fiscale is pretty cool, and the way we get those first six letters from a name is like a puzzle. Here’s a basic algorithm we can use to extract that magic combo from a person’s name:

Steps to Generate the Six Letters:

1. Start with the First Name:
   • Pick out the consonants in order.
   • If there aren’t enough consonants, add the vowels in order until you have 3 letters.
   • If you still don’t have 3 letters, pad with the letter ‘X’.
2. Then tackle the Last Name:
   • Follow the same steps as with the first name—consonants first, then vowels, and ‘X’ if needed.
3. Combine the results:
   • Take the first 3 letters from the surname and first name to make 6 characters total.

Example with “Marco Rossi”:

– First Name: Marco
– Consonants: M, R, C
– Vowels: A, O
– Result: MRC (3 consonants)

– Last Name: Rossi
– Consonants: R, S, S
– Vowels: O, I
– Result: RSS (3 consonants)

So we get: MRCRSS

Example with “Giuseppe Donatello”:

For “Giuseppe”:

– Consonants: G, S, P
– Vowels: I, U, E
– Result: GSP (3 consonants)

For “Donatello”:

– Consonants: D, N, T, L
– Vowels: O, A, E
– Result: DNT (3 consonants)

Final: GSPDNT

Short Names and Special Cases:

– For “Lu”: Consonant: L, Vowel: U (but need 3 letters) So: LUX.
– For “Anna”: Too many letters won’t help as “A” is already a lot of vowels. Result: ANN.
– If there’s a double letter like “Rossi,” you treat them as one. So just keep “R” once while counting it!

Code Snippet to Try It Out!

        function generateCodiceFiscale(firstName, lastName) {
            const vowels = 'AEIOU';
            
            function getLetters(name) {
                const consonants = [...name].filter(c => !vowels.includes(c)).join('');
                const vow = [...name].filter(c => vowels.includes(c)).join('');
                const result = (consonants + vow + 'XXX').slice(0, 3);
                return result.toUpperCase();
            }

            return getLetters(lastName) + getLetters(firstName);
        }

        // Example usage:
        console.log(generateCodiceFiscale('Marco', 'Rossi'));  // Outputs: MRCRSS
        console.log(generateCodiceFiscale('Giuseppe', 'Donatello')); // Outputs: GSPDNT