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Filename : qrcodegen.js
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import _createForOfIteratorHelper from "@babel/runtime/helpers/esm/createForOfIteratorHelper";
import _classCallCheck from "@babel/runtime/helpers/esm/classCallCheck";
import _createClass from "@babel/runtime/helpers/esm/createClass";
import _defineProperty from "@babel/runtime/helpers/esm/defineProperty";
var _class, _class2;
// Copyright (c) Project Nayuki. (MIT License)
// https://www.nayuki.io/page/qr-code-generator-library

// Modification with code reorder and prettier

// --------------------------------------------

// Appends the given number of low-order bits of the given value
// to the given buffer. Requires 0 <= len <= 31 and 0 <= val < 2^len.
function appendBits(val, len, bb) {
  if (len < 0 || len > 31 || val >>> len != 0) throw new RangeError('Value out of range');
  for (var i = len - 1; i >= 0; i-- // Append bit by bit
  ) bb.push(val >>> i & 1);
}

// Returns true iff the i'th bit of x is set to 1.
function getBit(x, i) {
  return (x >>> i & 1) != 0;
}

// Throws an exception if the given condition is false.
function assert(cond) {
  if (!cond) throw new Error('Assertion error');
}

/*---- Public helper enumeration ----*/
/*
 * Describes how a segment's data bits are numbererpreted. Immutable.
 */
export var Mode = /*#__PURE__*/function () {
  function Mode(modeBits, numBitsCharCount) {
    _classCallCheck(this, Mode);
    /*-- Constructor and fields --*/
    // The mode indicator bits, which is a unumber4 value (range 0 to 15).
    _defineProperty(this, "modeBits", void 0);
    // Number of character count bits for three different version ranges.
    _defineProperty(this, "numBitsCharCount", void 0);
    this.modeBits = modeBits;
    this.numBitsCharCount = numBitsCharCount;
  }

  /*-- Method --*/

  // (Package-private) Returns the bit width of the character count field for a segment in
  // this mode in a QR Code at the given version number. The result is in the range [0, 16].
  _createClass(Mode, [{
    key: "numCharCountBits",
    value: function numCharCountBits(ver) {
      return this.numBitsCharCount[Math.floor((ver + 7) / 17)];
    }
  }]);
  return Mode;
}();

/*---- Public helper enumeration ----*/

/*
 * The error correction level in a QR Code symbol. Immutable.
 */
_class = Mode;
/*-- Constants --*/
_defineProperty(Mode, "NUMERIC", new _class(0x1, [10, 12, 14]));
_defineProperty(Mode, "ALPHANUMERIC", new _class(0x2, [9, 11, 13]));
_defineProperty(Mode, "BYTE", new _class(0x4, [8, 16, 16]));
_defineProperty(Mode, "KANJI", new _class(0x8, [8, 10, 12]));
_defineProperty(Mode, "ECI", new _class(0x7, [0, 0, 0]));
export var Ecc = /*#__PURE__*/_createClass(function Ecc(ordinal, formatBits) {
  _classCallCheck(this, Ecc);
  // The QR Code can tolerate about 30% erroneous codewords
  /*-- Constructor and fields --*/
  // In the range 0 to 3 (unsigned 2-bit numbereger).
  _defineProperty(this, "ordinal", void 0);
  // (Package-private) In the range 0 to 3 (unsigned 2-bit numbereger).
  _defineProperty(this, "formatBits", void 0);
  this.ordinal = ordinal;
  this.formatBits = formatBits;
});

/*
 * A segment of character/binary/control data in a QR Code symbol.
 * Instances of this class are immutable.
 * The mid-level way to create a segment is to take the payload data
 * and call a static factory function such as QrSegment.makeNumeric().
 * The low-level way to create a segment is to custom-make the bit buffer
 * and call the QrSegment() constructor with appropriate values.
 * This segment class imposes no length restrictions, but QR Codes have restrictions.
 * Even in the most favorable conditions, a QR Code can only hold 7089 characters of data.
 * Any segment longer than this is meaningless for the purpose of generating QR Codes.
 */
_class2 = Ecc;
/*-- Constants --*/
_defineProperty(Ecc, "LOW", new _class2(0, 1));
// The QR Code can tolerate about  7% erroneous codewords
_defineProperty(Ecc, "MEDIUM", new _class2(1, 0));
// The QR Code can tolerate about 15% erroneous codewords
_defineProperty(Ecc, "QUARTILE", new _class2(2, 3));
// The QR Code can tolerate about 25% erroneous codewords
_defineProperty(Ecc, "HIGH", new _class2(3, 2));
export var QrSegment = /*#__PURE__*/function () {
  // Creates a new QR Code segment with the given attributes and data.
  // The character count (numChars) must agree with the mode and the bit buffer length,
  // but the constranumber isn't checked. The given bit buffer is cloned and stored.
  function QrSegment(mode, numChars, bitData) {
    _classCallCheck(this, QrSegment);
    /*-- Constructor (low level) and fields --*/
    // The mode indicator of this segment.
    _defineProperty(this, "mode", void 0);
    // The length of this segment's unencoded data. Measured in characters for
    // numeric/alphanumeric/kanji mode, bytes for byte mode, and 0 for ECI mode.
    // Always zero or positive. Not the same as the data's bit length.
    _defineProperty(this, "numChars", void 0);
    // The data bits of this segment. Accessed through getData().
    _defineProperty(this, "bitData", void 0);
    this.mode = mode;
    this.numChars = numChars;
    this.bitData = bitData;
    if (numChars < 0) throw new RangeError('Invalid argument');
    this.bitData = bitData.slice(); // Make defensive copy
  }

  /*-- Methods --*/

  // Returns a new copy of the data bits of this segment.
  _createClass(QrSegment, [{
    key: "getData",
    value: function getData() {
      return this.bitData.slice(); // Make defensive copy
    }

    // (Package-private) Calculates and returns the number of bits needed to encode the given segments at
    // the given version. The result is infinity if a segment has too many characters to fit its length field.
  }], [{
    key: "makeBytes",
    value: /*-- Static factory functions (mid level) --*/

    // Returns a segment representing the given binary data encoded in
    // byte mode. All input byte arrays are acceptable. Any text string
    // can be converted to UTF-8 bytes and encoded as a byte mode segment.
    function makeBytes(data) {
      var bb = [];
      var _iterator = _createForOfIteratorHelper(data),
        _step;
      try {
        for (_iterator.s(); !(_step = _iterator.n()).done;) {
          var b = _step.value;
          appendBits(b, 8, bb);
        }
      } catch (err) {
        _iterator.e(err);
      } finally {
        _iterator.f();
      }
      return new QrSegment(Mode.BYTE, data.length, bb);
    }

    // Returns a segment representing the given string of decimal digits encoded in numeric mode.
  }, {
    key: "makeNumeric",
    value: function makeNumeric(digits) {
      if (!QrSegment.isNumeric(digits)) throw new RangeError('String contains non-numeric characters');
      var bb = [];
      for (var i = 0; i < digits.length;) {
        // Consume up to 3 digits per iteration
        var n = Math.min(digits.length - i, 3);
        appendBits(parseInt(digits.substring(i, i + n), 10), n * 3 + 1, bb);
        i += n;
      }
      return new QrSegment(Mode.NUMERIC, digits.length, bb);
    }

    // Returns a segment representing the given text string encoded in alphanumeric mode.
    // The characters allowed are: 0 to 9, A to Z (uppercase only), space,
    // dollar, percent, asterisk, plus, hyphen, period, slash, colon.
  }, {
    key: "makeAlphanumeric",
    value: function makeAlphanumeric(text) {
      if (!QrSegment.isAlphanumeric(text)) throw new RangeError('String contains unencodable characters in alphanumeric mode');
      var bb = [];
      var i;
      for (i = 0; i + 2 <= text.length; i += 2) {
        // Process groups of 2
        var temp = QrSegment.ALPHANUMERIC_CHARSET.indexOf(text.charAt(i)) * 45;
        temp += QrSegment.ALPHANUMERIC_CHARSET.indexOf(text.charAt(i + 1));
        appendBits(temp, 11, bb);
      }
      if (i < text.length)
        // 1 character remaining
        appendBits(QrSegment.ALPHANUMERIC_CHARSET.indexOf(text.charAt(i)), 6, bb);
      return new QrSegment(Mode.ALPHANUMERIC, text.length, bb);
    }

    // Returns a new mutable list of zero or more segments to represent the given Unicode text string.
    // The result may use various segment modes and switch modes to optimize the length of the bit stream.
  }, {
    key: "makeSegments",
    value: function makeSegments(text) {
      // Select the most efficient segment encoding automatically
      if (text == '') return [];else if (QrSegment.isNumeric(text)) return [QrSegment.makeNumeric(text)];else if (QrSegment.isAlphanumeric(text)) return [QrSegment.makeAlphanumeric(text)];else return [QrSegment.makeBytes(QrSegment.toUtf8ByteArray(text))];
    }

    // Returns a segment representing an Extended Channel Interpretation
    // (ECI) designator with the given assignment value.
  }, {
    key: "makeEci",
    value: function makeEci(assignVal) {
      var bb = [];
      if (assignVal < 0) throw new RangeError('ECI assignment value out of range');else if (assignVal < 1 << 7) appendBits(assignVal, 8, bb);else if (assignVal < 1 << 14) {
        appendBits(2, 2, bb);
        appendBits(assignVal, 14, bb);
      } else if (assignVal < 1000000) {
        appendBits(6, 3, bb);
        appendBits(assignVal, 21, bb);
      } else throw new RangeError('ECI assignment value out of range');
      return new QrSegment(Mode.ECI, 0, bb);
    }

    // Tests whether the given string can be encoded as a segment in numeric mode.
    // A string is encodable iff each character is in the range 0 to 9.
  }, {
    key: "isNumeric",
    value: function isNumeric(text) {
      return QrSegment.NUMERIC_REGEX.test(text);
    }

    // Tests whether the given string can be encoded as a segment in alphanumeric mode.
    // A string is encodable iff each character is in the following set: 0 to 9, A to Z
    // (uppercase only), space, dollar, percent, asterisk, plus, hyphen, period, slash, colon.
  }, {
    key: "isAlphanumeric",
    value: function isAlphanumeric(text) {
      return QrSegment.ALPHANUMERIC_REGEX.test(text);
    }
  }, {
    key: "getTotalBits",
    value: function getTotalBits(segs, version) {
      var result = 0;
      var _iterator2 = _createForOfIteratorHelper(segs),
        _step2;
      try {
        for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
          var seg = _step2.value;
          var ccbits = seg.mode.numCharCountBits(version);
          if (seg.numChars >= 1 << ccbits) return Infinity; // The segment's length doesn't fit the field's bit width
          result += 4 + ccbits + seg.bitData.length;
        }
      } catch (err) {
        _iterator2.e(err);
      } finally {
        _iterator2.f();
      }
      return result;
    }

    // Returns a new array of bytes representing the given string encoded in UTF-8.
  }, {
    key: "toUtf8ByteArray",
    value: function toUtf8ByteArray(input) {
      var str = encodeURI(input);
      var result = [];
      for (var i = 0; i < str.length; i++) {
        if (str.charAt(i) != '%') result.push(str.charCodeAt(i));else {
          result.push(parseInt(str.substring(i + 1, i + 3), 16));
          i += 2;
        }
      }
      return result;
    }

    /*-- Constants --*/

    // Describes precisely all strings that are encodable in numeric mode.
  }]);
  return QrSegment;
}();

/*
 * A QR Code symbol, which is a type of two-dimension barcode.
 * Invented by Denso Wave and described in the ISO/IEC 18004 standard.
 * Instances of this class represent an immutable square grid of dark and light cells.
 * The class provides static factory functions to create a QR Code from text or binary data.
 * The class covers the QR Code Model 2 specification, supporting all versions (sizes)
 * from 1 to 40, all 4 error correction levels, and 4 character encoding modes.
 *
 * Ways to create a QR Code object:
 * - High level: Take the payload data and call QrCode.encodeText() or QrCode.encodeBinary().
 * - Mid level: Custom-make the list of segments and call QrCode.encodeSegments().
 * - Low level: Custom-make the array of data codeword bytes (including
 *   segment headers and final padding, excluding error correction codewords),
 *   supply the appropriate version number, and call the QrCode() constructor.
 * (Note that all ways require supplying the desired error correction level.)
 */
_defineProperty(QrSegment, "NUMERIC_REGEX", /^[0-9]*$/);
// Describes precisely all strings that are encodable in alphanumeric mode.
_defineProperty(QrSegment, "ALPHANUMERIC_REGEX", /^[A-Z0-9 $%*+.\/:-]*$/);
// The set of all legal characters in alphanumeric mode,
// where each character value maps to the index in the string.
_defineProperty(QrSegment, "ALPHANUMERIC_CHARSET", '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:');
export var QrCode = /*#__PURE__*/function () {
  // Creates a new QR Code with the given version number,
  // error correction level, data codeword bytes, and mask number.
  // This is a low-level API that most users should not use directly.
  // A mid-level API is the encodeSegments() function.
  function QrCode(
  // The version number of this QR Code, which is between 1 and 40 (inclusive).
  // This determines the size of this barcode.
  version,
  // The error correction level used in this QR Code.
  errorCorrectionLevel, dataCodewords, oriMsk) {
    _classCallCheck(this, QrCode);
    /*-- Fields --*/
    // The width and height of this QR Code, measured in modules, between
    // 21 and 177 (inclusive). This is equal to version * 4 + 17.
    _defineProperty(this, "size", void 0);
    // The index of the mask pattern used in this QR Code, which is between 0 and 7 (inclusive).
    // Even if a QR Code is created with automatic masking requested (mask = -1),
    // the resulting object still has a mask value between 0 and 7.
    _defineProperty(this, "mask", void 0);
    // The modules of this QR Code (false = light, true = dark).
    // Immutable after constructor finishes. Accessed through getModule().
    _defineProperty(this, "modules", []);
    // Indicates function modules that are not subjected to masking. Discarded when constructor finishes.
    _defineProperty(this, "isFunction", []);
    /*-- Constructor (low level) and fields --*/
    // The version number of this QR Code, which is between 1 and 40 (inclusive).
    // This determines the size of this barcode.
    _defineProperty(this, "version", void 0);
    // The error correction level used in this QR Code.
    _defineProperty(this, "errorCorrectionLevel", void 0);
    var msk = oriMsk;
    this.version = version;
    this.errorCorrectionLevel = errorCorrectionLevel;
    // Check scalar arguments
    if (version < QrCode.MIN_VERSION || version > QrCode.MAX_VERSION) throw new RangeError('Version value out of range');
    if (msk < -1 || msk > 7) throw new RangeError('Mask value out of range');
    this.size = version * 4 + 17;

    // Initialize both grids to be size*size arrays of Boolean false
    var row = [];
    for (var i = 0; i < this.size; i++) row.push(false);
    for (var _i = 0; _i < this.size; _i++) {
      this.modules.push(row.slice()); // Initially all light
      this.isFunction.push(row.slice());
    }

    // Compute ECC, draw modules
    this.drawFunctionPatterns();
    var allCodewords = this.addEccAndInterleave(dataCodewords);
    this.drawCodewords(allCodewords);

    // Do masking
    if (msk == -1) {
      // Automatically choose best mask
      var minPenalty = 1000000000;
      for (var _i2 = 0; _i2 < 8; _i2++) {
        this.applyMask(_i2);
        this.drawFormatBits(_i2);
        var penalty = this.getPenaltyScore();
        if (penalty < minPenalty) {
          msk = _i2;
          minPenalty = penalty;
        }
        this.applyMask(_i2); // Undoes the mask due to XOR
      }
    }
    assert(0 <= msk && msk <= 7);
    this.mask = msk;
    this.applyMask(msk); // Apply the final choice of mask
    this.drawFormatBits(msk); // Overwrite old format bits

    this.isFunction = [];
  }

  /*-- Accessor methods --*/

  // Returns the color of the module (pixel) at the given coordinates, which is false
  // for light or true for dark. The top left corner has the coordinates (x=0, y=0).
  // If the given coordinates are out of bounds, then false (light) is returned.
  _createClass(QrCode, [{
    key: "getModule",
    value: function getModule(x, y) {
      return 0 <= x && x < this.size && 0 <= y && y < this.size && this.modules[y][x];
    }

    // Modified to expose modules for easy access
  }, {
    key: "getModules",
    value: function getModules() {
      return this.modules;
    }

    /*-- Private helper methods for constructor: Drawing function modules --*/

    // Reads this object's version field, and draws and marks all function modules.
  }, {
    key: "drawFunctionPatterns",
    value: function drawFunctionPatterns() {
      // Draw horizontal and vertical timing patterns
      for (var i = 0; i < this.size; i++) {
        this.setFunctionModule(6, i, i % 2 == 0);
        this.setFunctionModule(i, 6, i % 2 == 0);
      }

      // Draw 3 finder patterns (all corners except bottom right; overwrites some timing modules)
      this.drawFinderPattern(3, 3);
      this.drawFinderPattern(this.size - 4, 3);
      this.drawFinderPattern(3, this.size - 4);

      // Draw numerous alignment patterns
      var alignPatPos = this.getAlignmentPatternPositions();
      var numAlign = alignPatPos.length;
      for (var _i3 = 0; _i3 < numAlign; _i3++) {
        for (var j = 0; j < numAlign; j++) {
          // Don't draw on the three finder corners
          if (!(_i3 == 0 && j == 0 || _i3 == 0 && j == numAlign - 1 || _i3 == numAlign - 1 && j == 0)) this.drawAlignmentPattern(alignPatPos[_i3], alignPatPos[j]);
        }
      }

      // Draw configuration data
      this.drawFormatBits(0); // Dummy mask value; overwritten later in the constructor
      this.drawVersion();
    }

    // Draws two copies of the format bits (with its own error correction code)
    // based on the given mask and this object's error correction level field.
  }, {
    key: "drawFormatBits",
    value: function drawFormatBits(mask) {
      // Calculate error correction code and pack bits
      var data = this.errorCorrectionLevel.formatBits << 3 | mask; // errCorrLvl is unumber2, mask is unumber3
      var rem = data;
      for (var i = 0; i < 10; i++) rem = rem << 1 ^ (rem >>> 9) * 0x537;
      var bits = (data << 10 | rem) ^ 0x5412; // unumber15
      assert(bits >>> 15 == 0);

      // Draw first copy
      for (var _i4 = 0; _i4 <= 5; _i4++) this.setFunctionModule(8, _i4, getBit(bits, _i4));
      this.setFunctionModule(8, 7, getBit(bits, 6));
      this.setFunctionModule(8, 8, getBit(bits, 7));
      this.setFunctionModule(7, 8, getBit(bits, 8));
      for (var _i5 = 9; _i5 < 15; _i5++) this.setFunctionModule(14 - _i5, 8, getBit(bits, _i5));

      // Draw second copy
      for (var _i6 = 0; _i6 < 8; _i6++) this.setFunctionModule(this.size - 1 - _i6, 8, getBit(bits, _i6));
      for (var _i7 = 8; _i7 < 15; _i7++) this.setFunctionModule(8, this.size - 15 + _i7, getBit(bits, _i7));
      this.setFunctionModule(8, this.size - 8, true); // Always dark
    }

    // Draws two copies of the version bits (with its own error correction code),
    // based on this object's version field, iff 7 <= version <= 40.
  }, {
    key: "drawVersion",
    value: function drawVersion() {
      if (this.version < 7) return;

      // Calculate error correction code and pack bits
      var rem = this.version; // version is unumber6, in the range [7, 40]
      for (var i = 0; i < 12; i++) rem = rem << 1 ^ (rem >>> 11) * 0x1f25;
      var bits = this.version << 12 | rem; // unumber18
      assert(bits >>> 18 == 0);

      // Draw two copies
      for (var _i8 = 0; _i8 < 18; _i8++) {
        var color = getBit(bits, _i8);
        var a = this.size - 11 + _i8 % 3;
        var b = Math.floor(_i8 / 3);
        this.setFunctionModule(a, b, color);
        this.setFunctionModule(b, a, color);
      }
    }

    // Draws a 9*9 finder pattern including the border separator,
    // with the center module at (x, y). Modules can be out of bounds.
  }, {
    key: "drawFinderPattern",
    value: function drawFinderPattern(x, y) {
      for (var dy = -4; dy <= 4; dy++) {
        for (var dx = -4; dx <= 4; dx++) {
          var dist = Math.max(Math.abs(dx), Math.abs(dy)); // Chebyshev/infinity norm
          var xx = x + dx;
          var yy = y + dy;
          if (0 <= xx && xx < this.size && 0 <= yy && yy < this.size) this.setFunctionModule(xx, yy, dist != 2 && dist != 4);
        }
      }
    }

    // Draws a 5*5 alignment pattern, with the center module
    // at (x, y). All modules must be in bounds.
  }, {
    key: "drawAlignmentPattern",
    value: function drawAlignmentPattern(x, y) {
      for (var dy = -2; dy <= 2; dy++) {
        for (var dx = -2; dx <= 2; dx++) this.setFunctionModule(x + dx, y + dy, Math.max(Math.abs(dx), Math.abs(dy)) != 1);
      }
    }

    // Sets the color of a module and marks it as a function module.
    // Only used by the constructor. Coordinates must be in bounds.
  }, {
    key: "setFunctionModule",
    value: function setFunctionModule(x, y, isDark) {
      this.modules[y][x] = isDark;
      this.isFunction[y][x] = true;
    }

    /*-- Private helper methods for constructor: Codewords and masking --*/

    // Returns a new byte string representing the given data with the appropriate error correction
    // codewords appended to it, based on this object's version and error correction level.
  }, {
    key: "addEccAndInterleave",
    value: function addEccAndInterleave(data) {
      var ver = this.version;
      var ecl = this.errorCorrectionLevel;
      if (data.length != QrCode.getNumDataCodewords(ver, ecl)) throw new RangeError('Invalid argument');

      // Calculate parameter numbers
      var numBlocks = QrCode.NUM_ERROR_CORRECTION_BLOCKS[ecl.ordinal][ver];
      var blockEccLen = QrCode.ECC_CODEWORDS_PER_BLOCK[ecl.ordinal][ver];
      var rawCodewords = Math.floor(QrCode.getNumRawDataModules(ver) / 8);
      var numShortBlocks = numBlocks - rawCodewords % numBlocks;
      var shortBlockLen = Math.floor(rawCodewords / numBlocks);

      // Split data numbero blocks and append ECC to each block
      var blocks = [];
      var rsDiv = QrCode.reedSolomonComputeDivisor(blockEccLen);
      for (var i = 0, k = 0; i < numBlocks; i++) {
        var dat = data.slice(k, k + shortBlockLen - blockEccLen + (i < numShortBlocks ? 0 : 1));
        k += dat.length;
        var ecc = QrCode.reedSolomonComputeRemainder(dat, rsDiv);
        if (i < numShortBlocks) dat.push(0);
        blocks.push(dat.concat(ecc));
      }

      // Interleave (not concatenate) the bytes from every block numbero a single sequence
      var result = [];
      var _loop = function _loop(_i9) {
        blocks.forEach(function (block, j) {
          // Skip the padding byte in short blocks
          if (_i9 != shortBlockLen - blockEccLen || j >= numShortBlocks) result.push(block[_i9]);
        });
      };
      for (var _i9 = 0; _i9 < blocks[0].length; _i9++) {
        _loop(_i9);
      }
      assert(result.length == rawCodewords);
      return result;
    }

    // Draws the given sequence of 8-bit codewords (data and error correction) onto the entire
    // data area of this QR Code. Function modules need to be marked off before this is called.
  }, {
    key: "drawCodewords",
    value: function drawCodewords(data) {
      if (data.length != Math.floor(QrCode.getNumRawDataModules(this.version) / 8)) throw new RangeError('Invalid argument');
      var i = 0; // Bit index numbero the data
      // Do the funny zigzag scan
      for (var right = this.size - 1; right >= 1; right -= 2) {
        // Index of right column in each column pair
        if (right == 6) right = 5;
        for (var vert = 0; vert < this.size; vert++) {
          // Vertical counter
          for (var j = 0; j < 2; j++) {
            var x = right - j; // Actual x coordinate
            var upward = (right + 1 & 2) == 0;
            var y = upward ? this.size - 1 - vert : vert; // Actual y coordinate
            if (!this.isFunction[y][x] && i < data.length * 8) {
              this.modules[y][x] = getBit(data[i >>> 3], 7 - (i & 7));
              i++;
            }
            // If this QR Code has any remainder bits (0 to 7), they were assigned as
            // 0/false/light by the constructor and are left unchanged by this method
          }
        }
      }
      assert(i == data.length * 8);
    }

    // XORs the codeword modules in this QR Code with the given mask pattern.
    // The function modules must be marked and the codeword bits must be drawn
    // before masking. Due to the arithmetic of XOR, calling applyMask() with
    // the same mask value a second time will undo the mask. A final well-formed
    // QR Code needs exactly one (not zero, two, etc.) mask applied.
  }, {
    key: "applyMask",
    value: function applyMask(mask) {
      if (mask < 0 || mask > 7) throw new RangeError('Mask value out of range');
      for (var y = 0; y < this.size; y++) {
        for (var x = 0; x < this.size; x++) {
          var invert = void 0;
          switch (mask) {
            case 0:
              invert = (x + y) % 2 == 0;
              break;
            case 1:
              invert = y % 2 == 0;
              break;
            case 2:
              invert = x % 3 == 0;
              break;
            case 3:
              invert = (x + y) % 3 == 0;
              break;
            case 4:
              invert = (Math.floor(x / 3) + Math.floor(y / 2)) % 2 == 0;
              break;
            case 5:
              invert = x * y % 2 + x * y % 3 == 0;
              break;
            case 6:
              invert = (x * y % 2 + x * y % 3) % 2 == 0;
              break;
            case 7:
              invert = ((x + y) % 2 + x * y % 3) % 2 == 0;
              break;
            default:
              throw new Error('Unreachable');
          }
          if (!this.isFunction[y][x] && invert) this.modules[y][x] = !this.modules[y][x];
        }
      }
    }

    // Calculates and returns the penalty score based on state of this QR Code's current modules.
    // This is used by the automatic mask choice algorithm to find the mask pattern that yields the lowest score.
  }, {
    key: "getPenaltyScore",
    value: function getPenaltyScore() {
      var result = 0;

      // Adjacent modules in row having same color, and finder-like patterns
      for (var y = 0; y < this.size; y++) {
        var runColor = false;
        var runX = 0;
        var runHistory = [0, 0, 0, 0, 0, 0, 0];
        for (var x = 0; x < this.size; x++) {
          if (this.modules[y][x] == runColor) {
            runX++;
            if (runX == 5) result += QrCode.PENALTY_N1;else if (runX > 5) result++;
          } else {
            this.finderPenaltyAddHistory(runX, runHistory);
            if (!runColor) result += this.finderPenaltyCountPatterns(runHistory) * QrCode.PENALTY_N3;
            runColor = this.modules[y][x];
            runX = 1;
          }
        }
        result += this.finderPenaltyTerminateAndCount(runColor, runX, runHistory) * QrCode.PENALTY_N3;
      }
      // Adjacent modules in column having same color, and finder-like patterns
      for (var _x = 0; _x < this.size; _x++) {
        var _runColor = false;
        var runY = 0;
        var _runHistory = [0, 0, 0, 0, 0, 0, 0];
        for (var _y = 0; _y < this.size; _y++) {
          if (this.modules[_y][_x] == _runColor) {
            runY++;
            if (runY == 5) result += QrCode.PENALTY_N1;else if (runY > 5) result++;
          } else {
            this.finderPenaltyAddHistory(runY, _runHistory);
            if (!_runColor) result += this.finderPenaltyCountPatterns(_runHistory) * QrCode.PENALTY_N3;
            _runColor = this.modules[_y][_x];
            runY = 1;
          }
        }
        result += this.finderPenaltyTerminateAndCount(_runColor, runY, _runHistory) * QrCode.PENALTY_N3;
      }

      // 2*2 blocks of modules having same color
      for (var _y2 = 0; _y2 < this.size - 1; _y2++) {
        for (var _x2 = 0; _x2 < this.size - 1; _x2++) {
          var color = this.modules[_y2][_x2];
          if (color == this.modules[_y2][_x2 + 1] && color == this.modules[_y2 + 1][_x2] && color == this.modules[_y2 + 1][_x2 + 1]) result += QrCode.PENALTY_N2;
        }
      }

      // Balance of dark and light modules
      var dark = 0;
      var _iterator3 = _createForOfIteratorHelper(this.modules),
        _step3;
      try {
        for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
          var row = _step3.value;
          dark = row.reduce(function (sum, color) {
            return sum + (color ? 1 : 0);
          }, dark);
        }
      } catch (err) {
        _iterator3.e(err);
      } finally {
        _iterator3.f();
      }
      var total = this.size * this.size; // Note that size is odd, so dark/total != 1/2
      // Compute the smallest numbereger k >= 0 such that (45-5k)% <= dark/total <= (55+5k)%
      var k = Math.ceil(Math.abs(dark * 20 - total * 10) / total) - 1;
      assert(0 <= k && k <= 9);
      result += k * QrCode.PENALTY_N4;
      assert(0 <= result && result <= 2568888); // Non-tight upper bound based on default values of PENALTY_N1, ..., N4
      return result;
    }

    /*-- Private helper functions --*/

    // Returns an ascending list of positions of alignment patterns for this version number.
    // Each position is in the range [0,177), and are used on both the x and y axes.
    // This could be implemented as lookup table of 40 variable-length lists of numberegers.
  }, {
    key: "getAlignmentPatternPositions",
    value: function getAlignmentPatternPositions() {
      if (this.version == 1) return [];else {
        var numAlign = Math.floor(this.version / 7) + 2;
        var step = this.version == 32 ? 26 : Math.ceil((this.version * 4 + 4) / (numAlign * 2 - 2)) * 2;
        var result = [6];
        for (var pos = this.size - 7; result.length < numAlign; pos -= step) result.splice(1, 0, pos);
        return result;
      }
    }

    // Returns the number of data bits that can be stored in a QR Code of the given version number, after
    // all function modules are excluded. This includes remainder bits, so it might not be a multiple of 8.
    // The result is in the range [208, 29648]. This could be implemented as a 40-entry lookup table.
  }, {
    key: "finderPenaltyCountPatterns",
    value:
    // Can only be called immediately after a light run is added, and
    // returns either 0, 1, or 2. A helper function for getPenaltyScore().
    function finderPenaltyCountPatterns(runHistory) {
      var n = runHistory[1];
      assert(n <= this.size * 3);
      var core = n > 0 && runHistory[2] == n && runHistory[3] == n * 3 && runHistory[4] == n && runHistory[5] == n;
      return (core && runHistory[0] >= n * 4 && runHistory[6] >= n ? 1 : 0) + (core && runHistory[6] >= n * 4 && runHistory[0] >= n ? 1 : 0);
    }

    // Must be called at the end of a line (row or column) of modules. A helper function for getPenaltyScore().
  }, {
    key: "finderPenaltyTerminateAndCount",
    value: function finderPenaltyTerminateAndCount(currentRunColor, oriCurrentRunLength, runHistory) {
      var currentRunLength = oriCurrentRunLength;
      if (currentRunColor) {
        // Terminate dark run
        this.finderPenaltyAddHistory(currentRunLength, runHistory);
        currentRunLength = 0;
      }
      currentRunLength += this.size; // Add light border to final run
      this.finderPenaltyAddHistory(currentRunLength, runHistory);
      return this.finderPenaltyCountPatterns(runHistory);
    }

    // Pushes the given value to the front and drops the last value. A helper function for getPenaltyScore().
  }, {
    key: "finderPenaltyAddHistory",
    value: function finderPenaltyAddHistory(oriCurrentRunLength, runHistory) {
      var currentRunLength = oriCurrentRunLength;
      if (runHistory[0] == 0) currentRunLength += this.size; // Add light border to initial run
      runHistory.pop();
      runHistory.unshift(currentRunLength);
    }

    /*-- Constants and tables --*/

    // The minimum version number supported in the QR Code Model 2 standard.
  }], [{
    key: "encodeText",
    value: /*-- Static factory functions (high level) --*/

    // Returns a QR Code representing the given Unicode text string at the given error correction level.
    // As a conservative upper bound, this function is guaranteed to succeed for strings that have 738 or fewer
    // Unicode code ponumbers (not UTF-16 code units) if the low error correction level is used. The smallest possible
    // QR Code version is automatically chosen for the output. The ECC level of the result may be higher than the
    // ecl argument if it can be done without increasing the version.
    function encodeText(text, ecl) {
      var segs = QrSegment.makeSegments(text);
      return QrCode.encodeSegments(segs, ecl);
    }

    // Returns a QR Code representing the given binary data at the given error correction level.
    // This function always encodes using the binary segment mode, not any text mode. The maximum number of
    // bytes allowed is 2953. The smallest possible QR Code version is automatically chosen for the output.
    // The ECC level of the result may be higher than the ecl argument if it can be done without increasing the version.
  }, {
    key: "encodeBinary",
    value: function encodeBinary(data, ecl) {
      var seg = QrSegment.makeBytes(data);
      return QrCode.encodeSegments([seg], ecl);
    }

    /*-- Static factory functions (mid level) --*/

    // Returns a QR Code representing the given segments with the given encoding parameters.
    // The smallest possible QR Code version within the given range is automatically
    // chosen for the output. Iff boostEcl is true, then the ECC level of the result
    // may be higher than the ecl argument if it can be done without increasing the
    // version. The mask number is either between 0 to 7 (inclusive) to force that
    // mask, or -1 to automatically choose an appropriate mask (which may be slow).
    // This function allows the user to create a custom sequence of segments that switches
    // between modes (such as alphanumeric and byte) to encode text in less space.
    // This is a mid-level API; the high-level API is encodeText() and encodeBinary().
  }, {
    key: "encodeSegments",
    value: function encodeSegments(segs, oriEcl) {
      var minVersion = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 1;
      var maxVersion = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 40;
      var mask = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : -1;
      var boostEcl = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : true;
      if (!(QrCode.MIN_VERSION <= minVersion && minVersion <= maxVersion && maxVersion <= QrCode.MAX_VERSION) || mask < -1 || mask > 7) throw new RangeError('Invalid value');

      // Find the minimal version number to use
      var version;
      var dataUsedBits;
      for (version = minVersion;; version++) {
        var _dataCapacityBits = QrCode.getNumDataCodewords(version, oriEcl) * 8; // Number of data bits available
        var usedBits = QrSegment.getTotalBits(segs, version);
        if (usedBits <= _dataCapacityBits) {
          dataUsedBits = usedBits;
          break; // This version number is found to be suitable
        }
        if (version >= maxVersion)
          // All versions in the range could not fit the given data
          throw new RangeError('Data too long');
      }
      var ecl = oriEcl;
      // Increase the error correction level while the data still fits in the current version number
      for (var _i10 = 0, _arr = [Ecc.MEDIUM, Ecc.QUARTILE, Ecc.HIGH]; _i10 < _arr.length; _i10++) {
        var newEcl = _arr[_i10];
        // From low to high
        if (boostEcl && dataUsedBits <= QrCode.getNumDataCodewords(version, newEcl) * 8) ecl = newEcl;
      }

      // Concatenate all segments to create the data bit string
      var bb = [];
      var _iterator4 = _createForOfIteratorHelper(segs),
        _step4;
      try {
        for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
          var seg = _step4.value;
          appendBits(seg.mode.modeBits, 4, bb);
          appendBits(seg.numChars, seg.mode.numCharCountBits(version), bb);
          var _iterator5 = _createForOfIteratorHelper(seg.getData()),
            _step5;
          try {
            for (_iterator5.s(); !(_step5 = _iterator5.n()).done;) {
              var b = _step5.value;
              bb.push(b);
            }
          } catch (err) {
            _iterator5.e(err);
          } finally {
            _iterator5.f();
          }
        }
      } catch (err) {
        _iterator4.e(err);
      } finally {
        _iterator4.f();
      }
      assert(bb.length == dataUsedBits);

      // Add terminator and pad up to a byte if applicable
      var dataCapacityBits = QrCode.getNumDataCodewords(version, ecl) * 8;
      assert(bb.length <= dataCapacityBits);
      appendBits(0, Math.min(4, dataCapacityBits - bb.length), bb);
      appendBits(0, (8 - bb.length % 8) % 8, bb);
      assert(bb.length % 8 == 0);

      // Pad with alternating bytes until data capacity is reached
      for (var padByte = 0xec; bb.length < dataCapacityBits; padByte ^= 0xec ^ 0x11) appendBits(padByte, 8, bb);

      // Pack bits numbero bytes in big endian
      var dataCodewords = [];
      while (dataCodewords.length * 8 < bb.length) dataCodewords.push(0);
      bb.forEach(function (b, i) {
        return dataCodewords[i >>> 3] |= b << 7 - (i & 7);
      });

      // Create the QR Code object
      return new QrCode(version, ecl, dataCodewords, mask);
    }
  }, {
    key: "getNumRawDataModules",
    value: function getNumRawDataModules(ver) {
      if (ver < QrCode.MIN_VERSION || ver > QrCode.MAX_VERSION) throw new RangeError('Version number out of range');
      var result = (16 * ver + 128) * ver + 64;
      if (ver >= 2) {
        var numAlign = Math.floor(ver / 7) + 2;
        result -= (25 * numAlign - 10) * numAlign - 55;
        if (ver >= 7) result -= 36;
      }
      assert(208 <= result && result <= 29648);
      return result;
    }

    // Returns the number of 8-bit data (i.e. not error correction) codewords contained in any
    // QR Code of the given version number and error correction level, with remainder bits discarded.
    // This stateless pure function could be implemented as a (40*4)-cell lookup table.
  }, {
    key: "getNumDataCodewords",
    value: function getNumDataCodewords(ver, ecl) {
      return Math.floor(QrCode.getNumRawDataModules(ver) / 8) - QrCode.ECC_CODEWORDS_PER_BLOCK[ecl.ordinal][ver] * QrCode.NUM_ERROR_CORRECTION_BLOCKS[ecl.ordinal][ver];
    }

    // Returns a Reed-Solomon ECC generator polynomial for the given degree. This could be
    // implemented as a lookup table over all possible parameter values, instead of as an algorithm.
  }, {
    key: "reedSolomonComputeDivisor",
    value: function reedSolomonComputeDivisor(degree) {
      if (degree < 1 || degree > 255) throw new RangeError('Degree out of range');
      // Polynomial coefficients are stored from highest to lowest power, excluding the leading term which is always 1.
      // For example the polynomial x^3 + 255x^2 + 8x + 93 is stored as the unumber8 array [255, 8, 93].
      var result = [];
      for (var i = 0; i < degree - 1; i++) result.push(0);
      result.push(1); // Start off with the monomial x^0

      // Compute the product polynomial (x - r^0) * (x - r^1) * (x - r^2) * ... * (x - r^{degree-1}),
      // and drop the highest monomial term which is always 1x^degree.
      // Note that r = 0x02, which is a generator element of this field GF(2^8/0x11D).
      var root = 1;
      for (var _i11 = 0; _i11 < degree; _i11++) {
        // Multiply the current product by (x - r^i)
        for (var j = 0; j < result.length; j++) {
          result[j] = QrCode.reedSolomonMultiply(result[j], root);
          if (j + 1 < result.length) result[j] ^= result[j + 1];
        }
        root = QrCode.reedSolomonMultiply(root, 0x02);
      }
      return result;
    }

    // Returns the Reed-Solomon error correction codeword for the given data and divisor polynomials.
  }, {
    key: "reedSolomonComputeRemainder",
    value: function reedSolomonComputeRemainder(data, divisor) {
      var result = divisor.map(function () {
        return 0;
      });
      var _iterator6 = _createForOfIteratorHelper(data),
        _step6;
      try {
        var _loop2 = function _loop2() {
          var b = _step6.value;
          // Polynomial division
          var factor = b ^ result.shift();
          result.push(0);
          divisor.forEach(function (coef, i) {
            return result[i] ^= QrCode.reedSolomonMultiply(coef, factor);
          });
        };
        for (_iterator6.s(); !(_step6 = _iterator6.n()).done;) {
          _loop2();
        }
      } catch (err) {
        _iterator6.e(err);
      } finally {
        _iterator6.f();
      }
      return result;
    }

    // Returns the product of the two given field elements modulo GF(2^8/0x11D). The arguments and result
    // are unsigned 8-bit numberegers. This could be implemented as a lookup table of 256*256 entries of unumber8.
  }, {
    key: "reedSolomonMultiply",
    value: function reedSolomonMultiply(x, y) {
      if (x >>> 8 != 0 || y >>> 8 != 0) throw new RangeError('Byte out of range');
      // Russian peasant multiplication
      var z = 0;
      for (var i = 7; i >= 0; i--) {
        z = z << 1 ^ (z >>> 7) * 0x11d;
        z ^= (y >>> i & 1) * x;
      }
      assert(z >>> 8 == 0);
      return z;
    }
  }]);
  return QrCode;
}();
_defineProperty(QrCode, "MIN_VERSION", 1);
// The maximum version number supported in the QR Code Model 2 standard.
_defineProperty(QrCode, "MAX_VERSION", 40);
// For use in getPenaltyScore(), when evaluating which mask is best.
_defineProperty(QrCode, "PENALTY_N1", 3);
_defineProperty(QrCode, "PENALTY_N2", 3);
_defineProperty(QrCode, "PENALTY_N3", 40);
_defineProperty(QrCode, "PENALTY_N4", 10);
_defineProperty(QrCode, "ECC_CODEWORDS_PER_BLOCK", [
// Version: (note that index 0 is for padding, and is set to an illegal value)
//0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40    Error correction level
[-1, 7, 10, 15, 20, 26, 18, 20, 24, 30, 18, 20, 24, 26, 30, 22, 24, 28, 30, 28, 28, 28, 28, 30, 30, 26, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30],
// Low
[-1, 10, 16, 26, 18, 24, 16, 18, 22, 22, 26, 30, 22, 22, 24, 24, 28, 28, 26, 26, 26, 26, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28],
// Medium
[-1, 13, 22, 18, 26, 18, 24, 18, 22, 20, 24, 28, 26, 24, 20, 30, 24, 28, 28, 26, 30, 28, 30, 30, 30, 30, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30],
// Quartile
[-1, 17, 28, 22, 16, 22, 28, 26, 26, 24, 28, 24, 28, 22, 24, 24, 30, 28, 28, 26, 28, 30, 24, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30] // High
]);
_defineProperty(QrCode, "NUM_ERROR_CORRECTION_BLOCKS", [
// Version: (note that index 0 is for padding, and is set to an illegal value)
//0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40    Error correction level
[-1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 4, 4, 4, 4, 4, 6, 6, 6, 6, 7, 8, 8, 9, 9, 10, 12, 12, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 22, 24, 25],
// Low
[-1, 1, 1, 1, 2, 2, 4, 4, 4, 5, 5, 5, 8, 9, 9, 10, 10, 11, 13, 14, 16, 17, 17, 18, 20, 21, 23, 25, 26, 28, 29, 31, 33, 35, 37, 38, 40, 43, 45, 47, 49],
// Medium
[-1, 1, 1, 2, 2, 4, 4, 6, 6, 8, 8, 8, 10, 12, 16, 12, 17, 16, 18, 21, 20, 23, 23, 25, 27, 29, 34, 34, 35, 38, 40, 43, 45, 48, 51, 53, 56, 59, 62, 65, 68],
// Quartile
[-1, 1, 1, 2, 4, 4, 4, 5, 6, 8, 8, 11, 11, 16, 16, 18, 16, 19, 21, 25, 25, 25, 34, 30, 32, 35, 37, 40, 42, 45, 48, 51, 54, 57, 60, 63, 66, 70, 74, 77, 81] // High
]);