swc/bundler/tests/.cache/deno/9e02da7d9a12d1b73a86ce9548a7dbeca8611eef.ts

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// Loaded from https://deno.land/x/segno@v1.1.0/lib/validations/isISIN.ts
// @ts-ignore allowing typedoc to build
import { assertString } from '../helpers/assertString.ts';
/**
* @ignore
*/
const isin = /^[A-Z]{2}[0-9A-Z]{9}[0-9]$/;
export const isISIN = (str: string) => {
assertString(str);
if (!isin.test(str)) {
return false;
}
const checksumStr = str.replace(/[A-Z]/g, (character) =>
// @ts-ignore allowing typedoc to build
parseInt(character, 36)
);
let sum = 0;
let digit;
let tmpNum;
let shouldDouble = true;
for (let i = checksumStr.length - 2; i >= 0; i--) {
digit = checksumStr.substring(i, i + 1);
tmpNum = parseInt(digit, 10);
if (shouldDouble) {
tmpNum *= 2;
if (tmpNum >= 10) {
sum += tmpNum + 1;
} else {
sum += tmpNum;
}
} else {
sum += tmpNum;
}
shouldDouble = !shouldDouble;
}
return parseInt(str.substr(str.length - 1), 10) === (10000 - sum) % 10;
};