import { PdfQRBarcodeValues } from './qr-barcode-values'; import { QRCodeVersion, ErrorCorrectionLevel } from '../barcode/enum/enum'; /** * Qrcode used to calculate the Qrcode control */ export class ErrorCorrectionCodewords { /** * Holds the length */ private mLength: number; /** * Holds the Error Correction Code Word */ private eccw: number; /** * Holds the databits */ private databits: number; /** * Holds the Data Code word */ private mDataCodeWord: string[]; /** * Holds G(x) */ private gx: number[]; /** * Holds all the values of Alpha */ private alpha: number[] = [1, 2, 4, 8, 16, 32, 64, 128, 29, 58, 116, 232, 205, 135, 19, 38, 76, 152, 45, 90, 180, 117, 234, 201, 143, 3, 6, 12, 24, 48, 96, 192, 157, 39, 78, 156, 37, 74, 148, 53, 106, 212, 181, 119, 238, 193, 159, 35, 70, 140, 5, 10, 20, 40, 80, 160, 93, 186, 105, 210, 185, 111, 222, 161, 95, 190, 97, 194, 153, 47, 94, 188, 101, 202, 137, 15, 30, 60, 120, 240, 253, 231, 211, 187, 107, 214, 177, 127, 254, 225, 223, 163, 91, 182, 113, 226, 217, 175, 67, 134, 17, 34, 68, 136, 13, 26, 52, 104, 208, 189, 103, 206, 129, 31, 62, 124, 248, 237, 199, 147, 59, 118, 236, 197, 151, 51, 102, 204, 133, 23, 46, 92, 184, 109, 218, 169, 79, 158, 33, 66, 132, 21, 42, 84, 168, 77, 154, 41, 82, 164, 85, 170, 73, 146, 57, 114, 228, 213, 183, 115, 230, 209, 191, 99, 198, 145, 63, 126, 252, 229, 215, 179, 123, 246, 241, 255, 227, 219, 171, 75, 150, 49, 98, 196, 149, 55, 110, 220, 165, 87, 174, 65, 130, 25, 50, 100, 200, 141, 7, 14, 28, 56, 112, 224, 221, 167, 83, 166, 81, 162, 89, 178, 121, 242, 249, 239, 195, 155, 43, 86, 172, 69, 138, 9, 18, 36, 72, 144, 61, 122, 244, 245, 247, 243, 251, 235, 203, 139, 11, 22, 44, 88, 176, 125, 250, 233, 207, 131, 27, 54, 108, 216, 173, 71, 142]; /** * Holds the Decimal value */ private decimalValue: number[]; /** * Holds the values of QR Barcode */ private mQrBarcodeValues: PdfQRBarcodeValues; /** * Sets and Gets the Data code word * * @param {string} value - Sets and Gets the Data code word * @private */ public set DC(value: string[]) { this.mDataCodeWord = value; } /** * Sets and Gets the DataBits * * @param {string} value - Sets and Gets the DataBits * @private */ public set DataBits(value: number) { this.databits = value; } /** * Sets and Gets the Error Correction Code Words * * @param {string} value - Sets and Gets the Error Correction Code Words * @private */ public set Eccw(value: number) { this.eccw = value; } /** * Initializes Error correction code word * * @param {QRCodeVersion} version - version of the qr code * @param {ErrorCorrectionLevel} correctionLevel - defines the level of error correction. */ constructor(version: QRCodeVersion, correctionLevel: ErrorCorrectionLevel) { this.mQrBarcodeValues = new PdfQRBarcodeValues(version, correctionLevel); let variable: string = 'DataCapacity'; this.mLength = this.mQrBarcodeValues[`${variable}`]; variable = 'NumberOfErrorCorrectingCodeWords'; this.eccw = this.mQrBarcodeValues[`${variable}`]; } /** * Gets the Error correction code word * * @returns { number} Gets the Error correction code word * @private */ public getErcw(): string[] { //const decimalRepresentation: number[]; //let ecw: string[]; this.decimalValue = [this.databits]; switch (this.eccw) { case 7: this.gx = [0, 87, 229, 146, 149, 238, 102, 21]; break; case 10: this.gx = [0, 251, 67, 46, 61, 118, 70, 64, 94, 32, 45]; break; case 13: this.gx = [0, 74, 152, 176, 100, 86, 100, 106, 104, 130, 218, 206, 140, 78]; break; case 15: this.gx = [0, 8, 183, 61, 91, 202, 37, 51, 58, 58, 237, 140, 124, 5, 99, 105]; break; case 16: this.gx = [0, 120, 104, 107, 109, 102, 161, 76, 3, 91, 191, 147, 169, 182, 194, 225, 120]; break; case 17: this.gx = [0, 43, 139, 206, 78, 43, 239, 123, 206, 214, 147, 24, 99, 150, 39, 243, 163, 136]; break; case 18: this.gx = [0, 215, 234, 158, 94, 184, 97, 118, 170, 79, 187, 152, 148, 252, 179, 5, 98, 96, 153]; break; case 20: this.gx = [0, 17, 60, 79, 50, 61, 163, 26, 187, 202, 180, 221, 225, 83, 239, 156, 164, 212, 212, 188, 190]; break; case 22: this.gx = [0, 210, 171, 247, 242, 93, 230, 14, 109, 221, 53, 200, 74, 8, 172, 98, 80, 219, 134, 160, 105, 165, 231]; break; case 24: this.gx = [0, 229, 121, 135, 48, 211, 117, 251, 126, 159, 180, 169, 152, 192, 226, 228, 218, 111, 0, 117, 232, 87, 96, 227, 21]; break; case 26: this.gx = [0, 173, 125, 158, 2, 103, 182, 118, 17, 145, 201, 111, 28, 165, 53, 161, 21, 245, 142, 13, 102, 48, 227, 153, 145, 218, 70]; break; case 28: this.gx = [0, 168, 223, 200, 104, 224, 234, 108, 180, 110, 190, 195, 147, 205, 27, 232, 201, 21, 43, 245, 87, 42, 195, 212, 119, 242, 37, 9, 123]; break; case 30: this.gx = [0, 41, 173, 145, 152, 216, 31, 179, 182, 50, 48, 110, 86, 239, 96, 222, 125, 42, 173, 226, 193, 224, 130, 156, 37, 251, 216, 238, 40, 192, 180]; break; } this.gx = this.getElement(this.gx, this.alpha); this.toDecimal(this.mDataCodeWord); const decimalRepresentation: number[] = this.divide(); const ecw: string[] = this.toBinary(decimalRepresentation); return ecw; } /* tslint:enable */ /** * Convert to decimal * * @returns {void}Convert to decimal. * @param {string[]} inString - Provide the version for the QR code * @private */ private toDecimal(inString: string[]): void { for (let i: number = 0; i < inString.length; i++) { this.decimalValue[parseInt(i.toString(), 10)] = parseInt(inString[parseInt(i.toString(), 10)], 2); } } /** * Convert decimal to binary. * * @returns {string[]}Convert decimal to binary. * @param {number[]} decimalRepresentation - Provide the version for the QR code * @private */ private toBinary(decimalRepresentation: number[]): string[] { const toBinary: string[] = []; for (let i: number = 0; i < this.eccw; i++) { let str: string = ''; const temp: string = decimalRepresentation[parseInt(i.toString(), 10)].toString(2); if (temp.length < 8) { for (let j: number = 0; j < 8 - temp.length; j++) { str += '0'; } } toBinary[parseInt(i.toString(), 10)] = str + temp; } return toBinary; } /** * Polynomial division. * * @returns {string[]}Polynomial division. * @private */ private divide(): number[] { let messagePolynom: { [key: number]: number } = {}; for (let i: number = 0; i < this.decimalValue.length; i++) { messagePolynom[this.decimalValue.length - 1 - i] = this.decimalValue[parseInt(i.toString(), 10)]; } let generatorPolynom: { [key: number]: number } = {}; for (let i: number = 0; i < this.gx.length; i++) { generatorPolynom[this.gx.length - 1 - i] = this.findElement(this.gx[parseInt(i.toString(), 10)], this.alpha); } let tempMessagePolynom: { [key: number]: number } = {}; for (const poly of Object.keys(messagePolynom)) { tempMessagePolynom[Number(poly) + this.eccw] = messagePolynom[`${poly}`]; } messagePolynom = tempMessagePolynom; const genLeadtermFactor: number = this.decimalValue.length + this.eccw - this.gx.length; tempMessagePolynom = {}; for (const poly of Object.keys(generatorPolynom)) { tempMessagePolynom[Number(poly) + genLeadtermFactor] = generatorPolynom[`${poly}`]; } generatorPolynom = tempMessagePolynom; let leadTermSource: { [key: number]: number } = messagePolynom; for (let i: number = 0; i < Object.keys(messagePolynom).length; i++) { const largestExponent: number = this.findLargestExponent(leadTermSource); if (leadTermSource[parseInt(largestExponent.toString(), 10)] === 0) { // First coefficient is already 0, simply remove it and continue delete leadTermSource[parseInt(largestExponent.toString(), 10)]; } else { const alphaNotation: { [key: number]: number } = this.convertToAlphaNotation(leadTermSource); let resPoly: { [key: number]: number } = this.multiplyGeneratorPolynomByLeadterm( generatorPolynom, alphaNotation[this.findLargestExponent(alphaNotation)], i); resPoly = this.convertToDecNotation(resPoly); resPoly = this.xORPolynoms(leadTermSource, resPoly); leadTermSource = resPoly; } } //Add the error correction word count according to polynomial values. this.eccw = Object.keys(leadTermSource).length; const returnValue: number[] = []; for (const temp of Object.keys(leadTermSource)) { returnValue.push(leadTermSource[`${temp}`]); } return returnValue.reverse(); } private xORPolynoms(messagePolynom: { [key: number]: number }, resPolynom: { [key: number]: number }): { [key: number]: number } { const resultPolynom: { [key: number]: number } = {}; let longPoly: { [key: number]: number } = {}; let shortPoly: { [key: number]: number } = {}; if (Object.keys(messagePolynom).length >= Object.keys(resPolynom).length) { longPoly = messagePolynom; shortPoly = resPolynom; } else { longPoly = resPolynom; shortPoly = messagePolynom; } const messagePolyExponent: number = this.findLargestExponent(messagePolynom); const shortPolyExponent: number = this.findLargestExponent(shortPoly); let i: number = Object.keys(longPoly).length - 1; for (const longPolySingle of Object.keys(longPoly)) { resultPolynom[messagePolyExponent - i] = longPoly[`${longPolySingle}`] ^ (Object.keys(shortPoly).length > i ? shortPoly[shortPolyExponent - i] : 0); i--; } const resultPolyExponent: number = this.findLargestExponent(resultPolynom); delete resultPolynom[parseInt(resultPolyExponent.toString(), 10)]; return resultPolynom; } private multiplyGeneratorPolynomByLeadterm( genPolynom: { [key: number]: number }, leadTermCoefficient: number, lowerExponentBy: number): { [key: number]: number } { const tempPolynom: { [key: number]: number } = {}; for (const treeNode of Object.keys(genPolynom)) { tempPolynom[Number(treeNode) - lowerExponentBy] = (genPolynom[`${treeNode}`] + leadTermCoefficient) % 255; } return tempPolynom; } private convertToDecNotation(poly: { [key: number]: number }): { [key: number]: number } { const tempPolynom: { [key: number]: number } = {}; for (const treeNode of Object.keys(poly)) { tempPolynom[`${treeNode}`] = this.getIntValFromAlphaExp(poly[`${treeNode}`], this.alpha); } return tempPolynom; } private convertToAlphaNotation(polynom: { [key: number]: number }): { [key: number]: number } { const tempPolynom: { [key: number]: number } = {}; for (const poly of Object.keys(polynom)) { if (polynom[`${poly}`] !== 0) { tempPolynom[`${poly}`] = this.findElement(polynom[`${poly}`], this.alpha); } } return tempPolynom; } private findLargestExponent(polynom: { [key: number]: number }): number { let largCo: number = 0; for (const poly of Object.keys(polynom)) { if (Number(poly) > largCo) { largCo = Number(poly); } } return largCo; } private getIntValFromAlphaExp(element: number, alpha: number[]): number { if (element > 255) { element = element - 255; } return alpha[parseInt(element.toString(), 10)]; } /** * Find the element in the alpha * * @returns {number}Find the element in the alpha. * @param {QRCodeVersion} element - Provide the element for the Qr code * @param {ErrorCorrectionLevel} alpha -provide the number * @private */ private findElement(element: number, alpha: number[]): number { let j: number; for (j = 0; j < alpha.length; j++) { if (element === alpha[parseInt(j.toString(), 10)]) { break; } } return j; } /** * Gets g(x) of the element */ /** * Gets g(x) of the element * * @returns {number}Gets g(x) of the element . * @param {QRCodeVersion} element - Provide the element for the Qr code * @param {ErrorCorrectionLevel} alpha -provide the number * @private */ private getElement(element: number[], alpha: number[]): number[] { const gx: number[] = [element.length]; for (let i: number = 0; i < element.length; i++) { if (element[parseInt(i.toString(), 10)] > 255) { element[parseInt(i.toString(), 10)] = element[parseInt(i.toString(), 10)] - 255; } gx[parseInt(i.toString(), 10)] = alpha[element[parseInt(i.toString(), 10)]]; } return gx; } }