73 lines
2.2 KiB
JavaScript
73 lines
2.2 KiB
JavaScript
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'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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var _constants = require('./constants');
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// Match Set functions
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var matchSetALength = function matchSetALength(string) {
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return string.match(new RegExp('^' + _constants.A_CHARS + '*'))[0].length;
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};
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var matchSetBLength = function matchSetBLength(string) {
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return string.match(new RegExp('^' + _constants.B_CHARS + '*'))[0].length;
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};
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var matchSetC = function matchSetC(string) {
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return string.match(new RegExp('^' + _constants.C_CHARS + '*'))[0];
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};
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// CODE128A or CODE128B
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function autoSelectFromAB(string, isA) {
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var ranges = isA ? _constants.A_CHARS : _constants.B_CHARS;
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var untilC = string.match(new RegExp('^(' + ranges + '+?)(([0-9]{2}){2,})([^0-9]|$)'));
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if (untilC) {
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return untilC[1] + String.fromCharCode(204) + autoSelectFromC(string.substring(untilC[1].length));
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}
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var chars = string.match(new RegExp('^' + ranges + '+'))[0];
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if (chars.length === string.length) {
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return string;
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}
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return chars + String.fromCharCode(isA ? 205 : 206) + autoSelectFromAB(string.substring(chars.length), !isA);
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}
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// CODE128C
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function autoSelectFromC(string) {
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var cMatch = matchSetC(string);
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var length = cMatch.length;
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if (length === string.length) {
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return string;
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}
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string = string.substring(length);
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// Select A/B depending on the longest match
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var isA = matchSetALength(string) >= matchSetBLength(string);
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return cMatch + String.fromCharCode(isA ? 206 : 205) + autoSelectFromAB(string, isA);
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}
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// Detect Code Set (A, B or C) and format the string
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exports.default = function (string) {
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var newString = void 0;
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var cLength = matchSetC(string).length;
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// Select 128C if the string start with enough digits
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if (cLength >= 2) {
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newString = _constants.C_START_CHAR + autoSelectFromC(string);
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} else {
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// Select A/B depending on the longest match
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var isA = matchSetALength(string) > matchSetBLength(string);
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newString = (isA ? _constants.A_START_CHAR : _constants.B_START_CHAR) + autoSelectFromAB(string, isA);
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}
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return newString.replace(/[\xCD\xCE]([^])[\xCD\xCE]/, // Any sequence between 205 and 206 characters
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function (match, char) {
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return String.fromCharCode(203) + char;
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});
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};
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