stdnum
Version:
Standard Number Validation
54 lines • 4.61 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings, weightedSum } from '../util';
import { isValidDateCompactYYYYMMDD } from '../util/isValidDate';
function clean(input) {
return strings.cleanUnicode(input, ' ');
}
const impl = {
name: 'Chinese Resident Identity Card Number',
localName: '居民身份证',
abbreviation: 'RIC No',
compact(input) {
const [value, err] = clean(input);
if (err) {
throw err;
}
return value;
},
format(input) {
const [value] = clean(input);
return value;
},
validate(input) {
const [value, error] = clean(input);
if (error) {
return { isValid: false, error };
}
if (value.length !== 18) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
const [front, check] = strings.splitAt(value, 17);
if (!strings.isdigits(front)) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
if (!isValidDateCompactYYYYMMDD(front.substring(6, 14), true)) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
const checkValue = weightedSum(front, {
weights: [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2],
modulus: 11,
});
const digit = '10X98765432'[checkValue];
if (check !== digit) {
return { isValid: false, error: new exceptions.InvalidChecksum() };
}
return {
isValid: true,
compact: value,
isIndividual: true,
isCompany: false,
};
},
};
export const { name, localName, abbreviation, validate, format, compact } = impl;
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