stdnum
Version:
Standard Number Validation
61 lines • 5.25 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings, weightedSum } from '../util';
import { banksMap, cities } from './banks';
function clean(input) {
return strings.cleanUnicode(input, '- ');
}
const impl = {
name: 'Mexican Standardized Bank Code',
localName: 'Clave Bancaria Estandarizada',
abbreviation: 'CLABE',
compact(input) {
const [value, err] = clean(input);
if (err) {
throw err;
}
return value.toLocaleUpperCase();
},
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() };
}
if (!strings.isdigits(value)) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
const [bankCode, cityCode, account, checksum] = strings.splitAt(value, 3, 6, 17);
if (banksMap[parseInt(bankCode, 10)] === undefined) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
if (cities[parseInt(cityCode, 10)] === undefined) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
if (!strings.isdigits(account)) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
const sum = (10 -
weightedSum(value.substr(0, 17), {
weights: [3, 7, 1],
modulus: 10,
})) %
10;
if (checksum !== String(sum)) {
return { isValid: false, error: new exceptions.InvalidChecksum() };
}
return {
isValid: true,
compact: value,
isIndividual: false,
isCompany: false,
};
},
};
export const { name, localName, abbreviation, validate, format, compact } = impl;
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