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authorRaindropsSys <contact@minteck.org>2023-04-06 22:18:28 +0200
committerRaindropsSys <contact@minteck.org>2023-04-06 22:18:28 +0200
commit83354b2b88218090988dd6e526b0a2505b57e0f1 (patch)
treee3c73c38a122a78bb7e66fbb99056407edd9d4b9 /includes/external/addressbook/node_modules/validator/lib/isISIN.js
parent47b8f2299a483024c4a6a8876af825a010954caa (diff)
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Updated 5 files and added 1110 files (automated)
Diffstat (limited to 'includes/external/addressbook/node_modules/validator/lib/isISIN.js')
-rw-r--r--includes/external/addressbook/node_modules/validator/lib/isISIN.js73
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diff --git a/includes/external/addressbook/node_modules/validator/lib/isISIN.js b/includes/external/addressbook/node_modules/validator/lib/isISIN.js
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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+ value: true
+});
+exports.default = isISIN;
+
+var _assertString = _interopRequireDefault(require("./util/assertString"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+var isin = /^[A-Z]{2}[0-9A-Z]{9}[0-9]$/; // this link details how the check digit is calculated:
+// https://www.isin.org/isin-format/. it is a little bit
+// odd in that it works with digits, not numbers. in order
+// to make only one pass through the ISIN characters, the
+// each alpha character is handled as 2 characters within
+// the loop.
+
+function isISIN(str) {
+ (0, _assertString.default)(str);
+
+ if (!isin.test(str)) {
+ return false;
+ }
+
+ var double = true;
+ var sum = 0; // convert values
+
+ for (var i = str.length - 2; i >= 0; i--) {
+ if (str[i] >= 'A' && str[i] <= 'Z') {
+ var value = str[i].charCodeAt(0) - 55;
+ var lo = value % 10;
+ var hi = Math.trunc(value / 10); // letters have two digits, so handle the low order
+ // and high order digits separately.
+
+ for (var _i = 0, _arr = [lo, hi]; _i < _arr.length; _i++) {
+ var digit = _arr[_i];
+
+ if (double) {
+ if (digit >= 5) {
+ sum += 1 + (digit - 5) * 2;
+ } else {
+ sum += digit * 2;
+ }
+ } else {
+ sum += digit;
+ }
+
+ double = !double;
+ }
+ } else {
+ var _digit = str[i].charCodeAt(0) - '0'.charCodeAt(0);
+
+ if (double) {
+ if (_digit >= 5) {
+ sum += 1 + (_digit - 5) * 2;
+ } else {
+ sum += _digit * 2;
+ }
+ } else {
+ sum += _digit;
+ }
+
+ double = !double;
+ }
+ }
+
+ var check = Math.trunc((sum + 9) / 10) * 10 - sum;
+ return +str[str.length - 1] === check;
+}
+
+module.exports = exports.default;
+module.exports.default = exports.default; \ No newline at end of file