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Refatoração da função format #15

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Refatoração da função format #15

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31 changes: 17 additions & 14 deletions src/format.js
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Original file line number Diff line number Diff line change
@@ -1,22 +1,25 @@
const mask = {
cpf(val) {
return val
.replace(/(\d{11})\d/, '$1')
.replace(/(\d{3})(\d)/, '$1.$2')
.replace(/(\d{3})(\d)/, '$1.$2')
.replace(/(\d{3})(\d)/, '$1-$2');
},
};


const onlyDigits = val => {
return val.replace(/\D/g, '');
};

/**
* Format a CPF number.
*
* @param {string} cpf Unformatted CPF number.
* @returns {string} Formatted CPF number.
*/
module.exports = (cpfNumber) => {
if (typeof cpfNumber !== 'string') {
throw new Error('Invalid CPF number')
}

const unformattedCpf = cpfNumber.replace(/\D/g, '')

if (unformattedCpf.length !== 11) {
throw new Error('Invalid CPF number')
}

const regex = /^(\d{3})(\d{3})(\d{3})(\d{2})$/
const mask = '$1.$2.$3-$4'

return unformattedCpf.replace(regex, mask)
const digits = onlyDigits(cpfNumber);
return mask.cpf(digits);
}