upc-generator/dist/upc-generator.es5.js

A randomly generated UPC-12(UPC-A) code For Amazon

var UPC = /** @class */ (function () {
    function UPC(prop) {
        if (prop === void 0) { prop = {}; }
        this._flagCode = '0';
        this._manufacturer = '';
        var flagCode = prop.flagCode, manufacturer = prop.manufacturer;
        this._flagCode = flagCode || '';
        if (manufacturer && manufacturer.length !== 5) {
            throw new RangeError('the length of manufacturer must be 5');
        }
        this._manufacturer = manufacturer || '';
    }
    UPC.prototype.create = function (prop) {
        if (prop === void 0) { prop = {}; }
        var flagCode = prop.flagCode, manufacturer = prop.manufacturer;
        if (manufacturer && manufacturer.length !== 5) {
            throw new RangeError('the length of manufacturer must be 5');
        }
        else {
            prop.manufacturer = this._manufacturer;
        }
        if (!flagCode) {
            prop.flagCode = this._flagCode;
        }
        return this._create(prop);
    };
    UPC.prototype.createMultiple = function (prop) {
        if (prop === void 0) { prop = { size: 1 }; }
        var size = prop.size;
        if (!size || Number(size) <= 0 || isNaN(Number(size))) {
            size = 1;
        }
        var arr = new Array(size);
        for (var i = 0; i < size; i++) {
            arr[i] = this.create(prop);
        }
        return arr;
    };
    UPC.prototype.isValid = function (num) {
        if (num.length !== 12) {
            return false;
        }
        var computedLastNum = this.computedEanLastNum(num);
        var lastNum = num.toString().charAt(11);
        return lastNum === computedLastNum;
    };
    UPC.prototype._create = function (prop) {
        var flagCode = prop.flagCode, manufacturer = prop.manufacturer;
        var code = '';
        if (!flagCode) {
            var randomNum = Math.floor(Math.random() * UPC.flagCodeArr.length);
            flagCode = UPC.flagCodeArr[randomNum];
        }
        if (!manufacturer) {
            manufacturer = this.fillNumber(5);
        }
        code = flagCode + manufacturer + this.fillNumber(5);
        var lastestNum = this.computedEanLastNum(code);
        return code + lastestNum;
    };
    UPC.prototype.computedEanLastNum = function (num) {
        var subNum = num.substr(0, 11);
        var odd = 0;
        var even = 0;
        var bOdd = true;
        for (var i = 0; i < subNum.length; i++) {
            if (bOdd) {
                odd += Number(subNum[i]);
            }
            else {
                even += Number(subNum[i]);
            }
            bOdd = !bOdd;
        }
        var sum = odd * 3 + even;
        var lastestNum = (10 - (sum % 10)) % 10;
        return lastestNum.toString();
    };
    UPC.prototype.fillNumber = function (len) {
        var str = '';
        for (var i = 0; i < len; i++) {
            str += Math.floor(Math.random() * 10).toString();
        }
        return str;
    };
    UPC.flagCodeArr = ['0', '1', '6', '7', '8', '9'];
    return UPC;
}());

export default UPC;
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