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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 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 | 1x 1x 1x 1x 1x 63x 63x 63x 98x 63x 1x 1x 52x 52x 52x 1x 16x 8x 8x 1x 8x 8x 4x 4x 1x 1x 1x 1x | /** * Copyright 2019 NEM * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import { createCanvas } from 'canvas'; import * as QRCodeCanvas from 'qrcode'; import { from as observableFrom, Observable, } from 'rxjs'; // internal dependencies import { CorrectionLevel, QRCodeDataSchema, QRCodeInterface, QRCodeSettings, QRCodeStreamType, QRCodeType, } from "../index"; import {INetworkType} from "./sdk/INetworkType"; abstract class QRCode implements QRCodeInterface { /** * Construct a QR Code instance out of its base64 * representation and type. * * @param type {QRCodeType} * @param base64 {string} */ constructor(/** * The QR Code type. * @var {QRCodeType} */ public readonly type: QRCodeType, /** * The network ID. * @var {number} */ public readonly networkType: INetworkType, /** * The network generation hash. * @var {string} */ public readonly generationHash: string, /** * Whether the data is encrypted * @var {boolean} */ public readonly encrypted: boolean = false, /** * The base64 representation of the QR Code content. * @var {string} */ public readonly base64?: string ) { } /// region Abstract Methods /** * The `getSchema()` method should return an instance * of a sub-class of QRCodeDataSchema which describes * the QR Code data. * * @return {QRCodeDataSchema} */ public abstract getSchema(): QRCodeDataSchema; /** * The `getTypeNumber()` method should return the * version number for QR codes of the underlying class. * * @return {number} */ public abstract getTypeNumber(): number; /// end-region Abstract Methods /** * The `getCorrectionLevel()` method should return the * QR Code correction level. * * Sub-classes may overload this method to provide with * a different correction level. * * @return {number} */ public getCorrectionLevel(): CorrectionLevel { return 'M'; } /** * The `toJSON()` method should return the JSON * representation of the QR Code content. * * @return {string} */ public toJSON(): string { // get the QR Code Data Schema const schema = this.getSchema(); // create the JSON object for this QR Code const json = schema.toObject(this); // format to JSON return JSON.stringify(json); } /** * Generate QRcode image Base64. * * The returned string can be put in the `src` attribute * of a `<img />` tag directly in HTML. The produced image * will be a PNG. * * @param {QRCodeSettings} settings (Optional) Settings for generation * @return {Observable<string>} Return image data in Base64. */ public toBase64( Esettings: QRCodeSettings = new QRCodeSettings(), ): Observable<string> { // get JSON representation const json = this.toJSON(); // get base64 representation return observableFrom(QRCodeCanvas.toDataURL(json, { errorCorrectionLevel: settings.correctionLevel, // do-not-set-'width' // do-not-set-'version' })); } /** * Generate QRCode as a string. This permits to display SVG * format, Terminal format or utf-8 format. * * @see https://www.npmjs.com/package/qrcode * @param {QRCodeSettings} settings (Optional) Settings for generation * @param {QRCodeTextType} streamType (Optional) The QR Code text type, defaults to "terminal" * @return {Observable<string>} */ public toString( Esettings: QRCodeSettings = new QRCodeSettings(), EstreamType: QRCodeStreamType = QRCodeStreamType.Terminal, ): Observable<string> { // get JSON representation const json = this.toJSON(); // build the QR Code return observableFrom(QRCodeCanvas.toString(json, { errorCorrectionLevel: settings.correctionLevel, width: settings.widthPixel, type: streamType, // do-not-set-'version' })); } /** * Generate QRCode and return object. * * @see https://www.npmjs.com/package/qrcode * @param {QRCodeSettings} settings (Optional) Settings for generation * @return {Observable<string>} */ public toObject( settings: QRCodeSettings = new QRCodeSettings(), ): Observable<any> { // get JSON representation const json = this.toJSON(); // build the QR Code return observableFrom([QRCodeCanvas.create(json, { errorCorrectionLevel: settings.correctionLevel, // do-not-set-'width' // do-not-set-'version' })]); } /** * Generate QRCode to be printed on a `node-canvas`. This * is compatible with the browser and node. * * @see https://www.npmjs.com/package/qrcode * @see https://www.npmjs.com/package/canvas * @param {QRCodeSettings} settings (Optional) Settings for generation * @return {Observable<string>} */ public toCanvas( settings: QRCodeSettings = new QRCodeSettings(), ): Observable<string> { // get JSON representation const json = this.toJSON(); // create canvas const canvas = createCanvas(250, 250); const context = canvas.getContext('2d'); // build the QR Code return observableFrom(QRCodeCanvas.toCanvas(canvas, json, { errorCorrectionLevel: settings.correctionLevel, width: settings.widthPixel, // do-not-set-'version' })); } } export {QRCode}; |