jspos/lib/BCDInterpreter.js

JavaScript ISO8583 ,JavaScript version of JPOS

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _Interpreter2 = require('./Interpreter');

var _Interpreter3 = _interopRequireDefault(_Interpreter2);

var _ISOUtil = require('./ISOUtil');

var _ISOUtil2 = _interopRequireDefault(_ISOUtil);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } /**
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                * @author Sean sean.snow@live.com
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                * @date 2015/12/24
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                */


var BCDInterpreter = function (_Interpreter) {
    _inherits(BCDInterpreter, _Interpreter);

    function BCDInterpreter(leftPadded, fPadded) {
        _classCallCheck(this, BCDInterpreter);

        var _this = _possibleConstructorReturn(this, (BCDInterpreter.__proto__ || Object.getPrototypeOf(BCDInterpreter)).call(this, leftPadded, fPadded));

        _this.leftPadded = leftPadded;
        _this.fPadded = fPadded;
        return _this;
    }

    _createClass(BCDInterpreter, [{
        key: 'interpret',
        value: function interpret(data, byte, offset) {
            _ISOUtil2.default.str2bcd(data, this.leftPadded, byte, offset);
            var paddedSize = data.length >> 1;
            if (this.fPadded && data.length % 2 === 1) {
                if (this.leftPadded) {
                    byte[offset] |= 0xF0;
                } else {
                    byte[offset + paddedSize] |= 0x0F;
                }
            }
        }
    }, {
        key: 'uninterpret',
        value: function uninterpret(rawData, offset, length) {
            return _ISOUtil2.default.bcd2str(rawData, offset, length, this.leftPadded);
        }
    }, {
        key: 'getPackedLength',
        value: function getPackedLength(nDataUnits) {
            return Math.floor((nDataUnits + 1) / 2);
        }
    }]);

    return BCDInterpreter;
}(_Interpreter3.default);

BCDInterpreter.LEFT_PADDED = new BCDInterpreter(true, false);
BCDInterpreter.RIGHT_PADDED = new BCDInterpreter(false, false);
exports.default = BCDInterpreter;