stdnum
Version:
Standard Number Validation
53 lines • 4.48 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings, weightedSum } from '../util';
import { isdigits, splitAt } from '../util/strings';
function clean(input) {
return strings.cleanUnicode(input, ' -');
}
const impl = {
name: 'British Columbia Personal Health Number',
localName: 'British Columbia Personal Health Number',
abbreviation: 'BC_BHN',
compact(input) {
const [value, err] = clean(input);
if (err) {
throw err;
}
return value;
},
format(input) {
const [value] = clean(input);
return splitAt(value, 4, 7).join(' ');
},
validate(input) {
const [value, error] = clean(input);
if (error) {
return { isValid: false, error };
}
if (value.length !== 10) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
if (value[0] !== '9') {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
if (!isdigits(value)) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
const [, front, check] = strings.splitAt(value, 1, -1);
const sum = weightedSum(front, {
weights: [2, 4, 8, 5, 10, 9, 7, 3],
modulus: 11,
});
if (String((11 - sum) % 11) !== check) {
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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