diff --git a/README.md b/README.md index d50c4854c..7d5979b80 100644 --- a/README.md +++ b/README.md @@ -114,6 +114,7 @@ Validator | Description **isIP(str [, version])** | check if the string is an IP (version 4 or 6). **isIPRange(str)** | check if the string is an IP Range(version 4 only). **isISBN(str [, version])** | check if the string is an ISBN (version 10 or 13). +**isEAN(str)** | check if the string is an EAN (European Article Number). **isISIN(str)** | check if the string is an [ISIN][ISIN] (stock/security identifier). **isISO31661Alpha2(str)** | check if the string is a valid [ISO 3166-1 alpha-2](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2) officially assigned country code. **isISO31661Alpha3(str)** | check if the string is a valid [ISO 3166-1 alpha-3](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-3) officially assigned country code. diff --git a/index.js b/index.js index 1bf16c886..0ee550633 100644 --- a/index.js +++ b/index.js @@ -107,6 +107,8 @@ var _isCreditCard = _interopRequireDefault(require("./lib/isCreditCard")); var _isIdentityCard = _interopRequireDefault(require("./lib/isIdentityCard")); +var _isEAN = _interopRequireDefault(require("./lib/isEAN")); + var _isISIN = _interopRequireDefault(require("./lib/isISIN")); var _isISBN = _interopRequireDefault(require("./lib/isISBN")); @@ -225,6 +227,7 @@ var validator = { isIn: _isIn.default, isCreditCard: _isCreditCard.default, isIdentityCard: _isIdentityCard.default, + isEAN: _isEAN.default, isISIN: _isISIN.default, isISBN: _isISBN.default, isISSN: _isISSN.default, diff --git a/lib/isEAN.js b/lib/isEAN.js new file mode 100644 index 000000000..098c44cf7 --- /dev/null +++ b/lib/isEAN.js @@ -0,0 +1,80 @@ +"use strict"; + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.default = isEAN; + +var _assertString = _interopRequireDefault(require("./util/assertString")); + +function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + +/** + * The most commonly used EAN standard is + * the thirteen-digit EAN-13, while the + * less commonly used 8-digit EAN-8 barcode was + * introduced for use on small packages. + * EAN consists of: + * GS1 prefix, manufacturer code, product code and check digit + * Reference: https://en.wikipedia.org/wiki/International_Article_Number + */ + +/** + * Define EAN Lenghts; 8 for EAN-8; 13 for EAN-13 + * and Regular Expression for valid EANs (EAN-8, EAN-13), + * with exact numberic matching of 8 or 13 digits [0-9] + */ +var LENGTH_EAN_8 = 8; +var validEanRegex = /^(\d{8}|\d{13})$/; +/** + * Get position weight given: + * EAN length and digit index/position + * + * @param {number} length + * @param {number} index + * @return {number} + */ + +function getPositionWeightThroughLengthAndIndex(length, index) { + if (length === LENGTH_EAN_8) { + return index % 2 === 0 ? 3 : 1; + } + + return index % 2 === 0 ? 1 : 3; +} +/** + * Calculate EAN Check Digit + * Reference: https://en.wikipedia.org/wiki/International_Article_Number#Calculation_of_checksum_digit + * + * @param {string} ean + * @return {number} + */ + + +function calculateCheckDigit(ean) { + var checksum = ean.slice(0, -1).split('').map(function (char, index) { + return Number(char) * getPositionWeightThroughLengthAndIndex(ean.length, index); + }).reduce(function (acc, partialSum) { + return acc + partialSum; + }, 0); + var remainder = 10 - checksum % 10; + return remainder < 10 ? remainder : 0; +} +/** + * Check if string is valid EAN: + * Matches EAN-8/EAN-13 regex + * Has valid check digit. + * + * @param {string} str + * @return {boolean} + */ + + +function isEAN(str) { + (0, _assertString.default)(str); + var actualCheckDigit = Number(str.slice(-1)); + return validEanRegex.test(str) && actualCheckDigit === calculateCheckDigit(str); +} + +module.exports = exports.default; +module.exports.default = exports.default; \ No newline at end of file diff --git a/src/index.js b/src/index.js index d53951ca2..7b46f359a 100644 --- a/src/index.js +++ b/src/index.js @@ -64,6 +64,7 @@ import isIn from './lib/isIn'; import isCreditCard from './lib/isCreditCard'; import isIdentityCard from './lib/isIdentityCard'; +import isEAN from './lib/isEAN'; import isISIN from './lib/isISIN'; import isISBN from './lib/isISBN'; import isISSN from './lib/isISSN'; @@ -160,6 +161,7 @@ const validator = { isIn, isCreditCard, isIdentityCard, + isEAN, isISIN, isISBN, isISSN, diff --git a/src/lib/isEAN.js b/src/lib/isEAN.js new file mode 100644 index 000000000..674e14ceb --- /dev/null +++ b/src/lib/isEAN.js @@ -0,0 +1,70 @@ +/** + * The most commonly used EAN standard is + * the thirteen-digit EAN-13, while the + * less commonly used 8-digit EAN-8 barcode was + * introduced for use on small packages. + * EAN consists of: + * GS1 prefix, manufacturer code, product code and check digit + * Reference: https://en.wikipedia.org/wiki/International_Article_Number + */ + +import assertString from './util/assertString'; + +/** + * Define EAN Lenghts; 8 for EAN-8; 13 for EAN-13 + * and Regular Expression for valid EANs (EAN-8, EAN-13), + * with exact numberic matching of 8 or 13 digits [0-9] + */ +const LENGTH_EAN_8 = 8; +const validEanRegex = /^(\d{8}|\d{13})$/; + + +/** + * Get position weight given: + * EAN length and digit index/position + * + * @param {number} length + * @param {number} index + * @return {number} + */ +function getPositionWeightThroughLengthAndIndex(length, index) { + if (length === LENGTH_EAN_8) { + return (index % 2 === 0) ? 3 : 1; + } + + return (index % 2 === 0) ? 1 : 3; +} + +/** + * Calculate EAN Check Digit + * Reference: https://en.wikipedia.org/wiki/International_Article_Number#Calculation_of_checksum_digit + * + * @param {string} ean + * @return {number} + */ +function calculateCheckDigit(ean) { + const checksum = ean + .slice(0, -1) + .split('') + .map((char, index) => Number(char) * getPositionWeightThroughLengthAndIndex(ean.length, index)) + .reduce((acc, partialSum) => acc + partialSum, 0); + + const remainder = 10 - (checksum % 10); + + return remainder < 10 ? remainder : 0; +} + +/** + * Check if string is valid EAN: + * Matches EAN-8/EAN-13 regex + * Has valid check digit. + * + * @param {string} str + * @return {boolean} + */ +export default function isEAN(str) { + assertString(str); + const actualCheckDigit = Number(str.slice(-1)); + + return validEanRegex.test(str) && actualCheckDigit === calculateCheckDigit(str); +} diff --git a/test/validators.js b/test/validators.js index f9fae6feb..f660f0f28 100644 --- a/test/validators.js +++ b/test/validators.js @@ -3475,6 +3475,25 @@ describe('Validators', () => { }); }); + it('should validate EANs', () => { + test({ + validator: 'isEAN', + valid: [ + '9421023610112', + '1234567890128', + '4012345678901', + '9771234567003', + '9783161484100', + '73513537', + ], + invalid: [ + '5901234123451', + '079777681629', + '0705632085948', + ], + }); + }); + it('should validate ISSNs', () => { test({ validator: 'isISSN', diff --git a/validator.js b/validator.js index bcd3eed7b..926d1ce13 100644 --- a/validator.js +++ b/validator.js @@ -27,8 +27,6 @@ }(this, (function () { 'use strict'; function _typeof(obj) { - "@babel/helpers - typeof"; - if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function (obj) { return typeof obj; @@ -1446,6 +1444,73 @@ function isIdentityCard(str, locale) { throw new Error("Invalid locale '".concat(locale, "'")); } +/** + * The most commonly used EAN standard is + * the thirteen-digit EAN-13, while the + * less commonly used 8-digit EAN-8 barcode was + * introduced for use on small packages. + * EAN consists of: + * GS1 prefix, manufacturer code, product code and check digit + * Reference: https://en.wikipedia.org/wiki/International_Article_Number + */ +/** + * Define EAN Lenghts; 8 for EAN-8; 13 for EAN-13 + * and Regular Expression for valid EANs (EAN-8, EAN-13), + * with exact numberic matching of 8 or 13 digits [0-9] + */ + +var LENGTH_EAN_8 = 8; +var validEanRegex = /^(\d{8}|\d{13})$/; +/** + * Get position weight given: + * EAN length and digit index/position + * + * @param {number} length + * @param {number} index + * @return {number} + */ + +function getPositionWeightThroughLengthAndIndex(length, index) { + if (length === LENGTH_EAN_8) { + return index % 2 === 0 ? 3 : 1; + } + + return index % 2 === 0 ? 1 : 3; +} +/** + * Calculate EAN Check Digit + * Reference: https://en.wikipedia.org/wiki/International_Article_Number#Calculation_of_checksum_digit + * + * @param {string} ean + * @return {number} + */ + + +function calculateCheckDigit(ean) { + var checksum = ean.slice(0, -1).split('').map(function (_char, index) { + return Number(_char) * getPositionWeightThroughLengthAndIndex(ean.length, index); + }).reduce(function (acc, partialSum) { + return acc + partialSum; + }, 0); + var remainder = 10 - checksum % 10; + return remainder < 10 ? remainder : 0; +} +/** + * Check if string is valid EAN: + * Matches EAN-8/EAN-13 regex + * Has valid check digit. + * + * @param {string} str + * @return {boolean} + */ + + +function isEAN(str) { + assertString(str); + var actualCheckDigit = Number(str.slice(-1)); + return validEanRegex.test(str) && actualCheckDigit === calculateCheckDigit(str); +} + var isin = /^[A-Z]{2}[0-9A-Z]{9}[0-9]$/; function isISIN(str) { assertString(str); @@ -2313,6 +2378,7 @@ var validator = { isIn: isIn, isCreditCard: isCreditCard, isIdentityCard: isIdentityCard, + isEAN: isEAN, isISIN: isISIN, isISBN: isISBN, isISSN: isISSN, diff --git a/validator.min.js b/validator.min.js index 12a85c4a7..2848ef130 100644 --- a/validator.min.js +++ b/validator.min.js @@ -20,4 +20,4 @@ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ -!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof 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