| 1 | import 'dart:math'; |
| 2 | |
| 3 | import 'package:cake_wallet/generated/i18n.dart'; |
| 4 | import 'package:cake_wallet/new-ui/pages/scan_page.dart'; |
| 5 | import 'package:cake_wallet/src/widgets/alert_with_one_action.dart'; |
| 6 | import 'package:cake_wallet/utils/show_pop_up.dart'; |
| 7 | import 'package:cw_core/utils/print_verbose.dart'; |
| 8 | import 'package:fast_scanner/fast_scanner.dart'; |
| 9 | import 'package:flutter/cupertino.dart'; |
| 10 | import 'package:flutter/material.dart'; |
| 11 | import 'package:flutter/scheduler.dart'; |
| 12 | import 'package:modal_bottom_sheet/modal_bottom_sheet.dart'; |
| 13 | import 'package:ur/ur_decoder.dart'; |
| 14 | |
| 15 | var isQrScannerShown = false; |
| 16 | |
| 17 | Future<String?> presentQRScanner(BuildContext context, |
| 18 | {bool showHelp = false, bool showManualInput = true, bool useModal = false}) async { |
| 19 | isQrScannerShown = true; |
| 20 | try { |
| 21 | final result = useModal |
| 22 | ? await CupertinoScaffold.showCupertinoModalBottomSheet<String?>( |
| 23 | context: context, |
| 24 | builder: (context) => ScanPage( |
| 25 | showHelp: showHelp, |
| 26 | showManualInput: showManualInput, |
| 27 | )) |
| 28 | : await Navigator.of(context).push<String>( |
| 29 | CupertinoPageRoute( |
| 30 | builder: (context) { |
| 31 | return ScanPage( |
| 32 | showHelp: showHelp, |
| 33 | showManualInput: showManualInput, |
| 34 | ); |
| 35 | }, |
| 36 | ), |
| 37 | ); |
| 38 | isQrScannerShown = false; |
| 39 | return result; |
| 40 | } catch (e) { |
| 41 | isQrScannerShown = false; |
| 42 | rethrow; |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | // https://github.com/MrCyjaneK/fast_scanner/blob/master/example/lib/barcode_scanner_simple.dart |
| 47 | class BarcodeScannerSimple extends StatefulWidget { |
| 48 | const BarcodeScannerSimple({super.key}); |
| 49 | |
| 50 | @override |
| 51 | State<BarcodeScannerSimple> createState() => _BarcodeScannerSimpleState(); |
| 52 | } |
| 53 | |
| 54 | class _BarcodeScannerSimpleState extends State<BarcodeScannerSimple> { |
| 55 | Barcode? _barcode; |
| 56 | bool popped = false; |
| 57 | |
| 58 | List<String> urCodes = []; |
| 59 | late var ur = URQRToURQRData(urCodes); |
| 60 | final decoder = URDecoder(); |
| 61 | |
| 62 | void _handleBarcode(BarcodeCapture barcodes) { |
| 63 | try { |
| 64 | _handleBarcodeInternal(barcodes); |
| 65 | } catch (e) { |
| 66 | showPopUp<void>( |
| 67 | context: context, |
| 68 | builder: (context) { |
| 69 | return AlertWithOneAction( |
| 70 | alertTitle: S.of(context).error, |
| 71 | alertContent: S.of(context).error_dialog_content, |
| 72 | buttonText: S.of(context).ok, |
| 73 | buttonAction: () { |
| 74 | Navigator.of(context).pop(); |
| 75 | }, |
| 76 | ); |
| 77 | }, |
| 78 | ); |
| 79 | printV(e); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | void _handleBarcodeInternal(BarcodeCapture barcodes) { |
| 84 | for (final barcode in barcodes.barcodes) { |
| 85 | // don't handle unknown QR codes |
| 86 | if (barcode.rawValue?.trim().isEmpty ?? false == false) continue; |
| 87 | if (barcode.rawValue!.startsWith("ur:")) { |
| 88 | if (urCodes.contains(barcode.rawValue)) continue; |
| 89 | decoder.receivePart(barcode.rawValue!); |
| 90 | setState(() { |
| 91 | urCodes.add(barcode.rawValue!); |
| 92 | ur = URQRToURQRData(urCodes); |
| 93 | }); |
| 94 | if (decoder.estimatedPercentComplete() == 1) { |
| 95 | setState(() { |
| 96 | popped = true; |
| 97 | }); |
| 98 | SchedulerBinding.instance.addPostFrameCallback((_) { |
| 99 | Navigator.of(context).pop(ur.inputs.join("\n")); |
| 100 | }); |
| 101 | } |
| 102 | ; |
| 103 | } |
| 104 | } |
| 105 | if (urCodes.isNotEmpty) return; |
| 106 | if (mounted) { |
| 107 | setState(() { |
| 108 | _barcode = barcodes.barcodes.firstOrNull; |
| 109 | }); |
| 110 | if (_barcode != null && popped != true) { |
| 111 | setState(() { |
| 112 | popped = true; |
| 113 | }); |
| 114 | Navigator.of(context).pop(_barcode!.rawValue ?? _barcode!.rawBytes); |
| 115 | } |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | final MobileScannerController ctrl = MobileScannerController(); |
| 120 | |
| 121 | @override |
| 122 | Widget build(BuildContext context) { |
| 123 | return Scaffold( |
| 124 | appBar: AppBar( |
| 125 | title: const Text('Scan'), |
| 126 | actions: [ |
| 127 | SwitchCameraButton(controller: ctrl), |
| 128 | ToggleFlashlightButton(controller: ctrl), |
| 129 | ], |
| 130 | ), |
| 131 | backgroundColor: Theme.of(context).colorScheme.surface, |
| 132 | body: Stack( |
| 133 | children: [ |
| 134 | MobileScanner( |
| 135 | onDetect: _handleBarcode, |
| 136 | controller: ctrl, |
| 137 | ), |
| 138 | if (decoder.expectedPartCount() != null) |
| 139 | Center( |
| 140 | child: Text( |
| 141 | "${decoder.processedPartsCount()}/${decoder.expectedPartCount()!}", |
| 142 | style: Theme.of(context) |
| 143 | .textTheme |
| 144 | .displayLarge |
| 145 | ?.copyWith(color: Theme.of(context).colorScheme.onSurface), |
| 146 | ), |
| 147 | ), |
| 148 | SizedBox( |
| 149 | child: Center( |
| 150 | child: SizedBox( |
| 151 | width: 250, |
| 152 | height: 250, |
| 153 | child: CustomPaint( |
| 154 | painter: ProgressPainter( |
| 155 | urQrProgress: URQrProgress( |
| 156 | expectedPartCount: decoder.expectedPartCount() ?? 0, |
| 157 | processedPartsCount: decoder.processedPartsCount(), |
| 158 | receivedPartIndexes: decoder.receivedPartIndexes().toList(), |
| 159 | percentage: decoder.estimatedPercentComplete(), |
| 160 | ), |
| 161 | ), |
| 162 | ), |
| 163 | ), |
| 164 | ), |
| 165 | ), |
| 166 | ], |
| 167 | ), |
| 168 | ); |
| 169 | } |
| 170 | |
| 171 | List<int> _urParts() { |
| 172 | List<int> l = []; |
| 173 | for (var inp in ur.inputs) { |
| 174 | try { |
| 175 | l.add(int.parse(inp.split("/")[1].split("-")[0])); |
| 176 | } catch (e) {} |
| 177 | } |
| 178 | return l; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | class ToggleFlashlightButton extends StatelessWidget { |
| 183 | const ToggleFlashlightButton({required this.controller, super.key}); |
| 184 | |
| 185 | final MobileScannerController controller; |
| 186 | |
| 187 | @override |
| 188 | Widget build(BuildContext context) { |
| 189 | return ValueListenableBuilder( |
| 190 | valueListenable: controller, |
| 191 | builder: (context, state, child) { |
| 192 | if (!state.isInitialized || !state.isRunning) { |
| 193 | return const SizedBox.shrink(); |
| 194 | } |
| 195 | |
| 196 | switch (state.torchState) { |
| 197 | case TorchState.auto: |
| 198 | return IconButton( |
| 199 | iconSize: 32.0, |
| 200 | icon: const Icon(Icons.flash_auto), |
| 201 | onPressed: () async { |
| 202 | await controller.toggleTorch(); |
| 203 | }, |
| 204 | ); |
| 205 | case TorchState.off: |
| 206 | return IconButton( |
| 207 | iconSize: 32.0, |
| 208 | icon: const Icon(Icons.flash_off), |
| 209 | onPressed: () async { |
| 210 | await controller.toggleTorch(); |
| 211 | }, |
| 212 | ); |
| 213 | case TorchState.on: |
| 214 | return IconButton( |
| 215 | iconSize: 32.0, |
| 216 | icon: const Icon(Icons.flash_on), |
| 217 | onPressed: () async { |
| 218 | await controller.toggleTorch(); |
| 219 | }, |
| 220 | ); |
| 221 | case TorchState.unavailable: |
| 222 | return Icon( |
| 223 | Icons.no_flash, |
| 224 | color: Theme.of(context).colorScheme.onSurfaceVariant, |
| 225 | ); |
| 226 | } |
| 227 | }, |
| 228 | ); |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | class SwitchCameraButton extends StatelessWidget { |
| 233 | const SwitchCameraButton({required this.controller, super.key}); |
| 234 | |
| 235 | final MobileScannerController controller; |
| 236 | |
| 237 | @override |
| 238 | Widget build(BuildContext context) { |
| 239 | return ValueListenableBuilder( |
| 240 | valueListenable: controller, |
| 241 | builder: (context, state, child) { |
| 242 | if (!state.isInitialized || !state.isRunning) { |
| 243 | return const SizedBox.shrink(); |
| 244 | } |
| 245 | |
| 246 | final int? availableCameras = state.availableCameras; |
| 247 | |
| 248 | if (availableCameras != null && availableCameras < 2) { |
| 249 | return const SizedBox.shrink(); |
| 250 | } |
| 251 | |
| 252 | final Widget icon; |
| 253 | |
| 254 | switch (state.cameraDirection) { |
| 255 | case CameraFacing.front: |
| 256 | icon = const Icon(Icons.camera_front); |
| 257 | case CameraFacing.back: |
| 258 | icon = const Icon(Icons.camera_rear); |
| 259 | } |
| 260 | |
| 261 | return IconButton( |
| 262 | iconSize: 32.0, |
| 263 | icon: icon, |
| 264 | onPressed: () async { |
| 265 | await controller.switchCamera(); |
| 266 | }, |
| 267 | ); |
| 268 | }, |
| 269 | ); |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | class URQRData { |
| 274 | URQRData( |
| 275 | {required this.tag, |
| 276 | required this.str, |
| 277 | required this.progress, |
| 278 | required this.count, |
| 279 | required this.error, |
| 280 | required this.inputs}); |
| 281 | final String tag; |
| 282 | final String str; |
| 283 | final double progress; |
| 284 | final int count; |
| 285 | final String error; |
| 286 | final List<String> inputs; |
| 287 | Map<String, dynamic> toJson() { |
| 288 | return { |
| 289 | "tag": tag, |
| 290 | "str": str, |
| 291 | "progress": progress, |
| 292 | "count": count, |
| 293 | "error": error, |
| 294 | "inputs": inputs, |
| 295 | }; |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | URQRData URQRToURQRData(List<String> urqr_) { |
| 300 | final urqr = urqr_.toSet().toList(); |
| 301 | urqr.sort((s1, s2) { |
| 302 | final s1s = s1.split("/"); |
| 303 | final s1frameStr = s1s[1].split("-"); |
| 304 | final s1curFrame = int.parse(s1frameStr[0]); |
| 305 | final s2s = s2.split("/"); |
| 306 | final s2frameStr = s2s[1].split("-"); |
| 307 | final s2curFrame = int.parse(s2frameStr[0]); |
| 308 | return s1curFrame - s2curFrame; |
| 309 | }); |
| 310 | |
| 311 | String tag = ''; |
| 312 | int count = 0; |
| 313 | String bw = ''; |
| 314 | for (var elm in urqr) { |
| 315 | final s = elm.substring(elm.indexOf(":") + 1); // strip down ur: prefix |
| 316 | final s2 = s.split("/"); |
| 317 | tag = s2[0]; |
| 318 | final frameStr = s2[1].split("-"); |
| 319 | // final curFrame = int.parse(frameStr[0]); |
| 320 | count = int.parse(frameStr[1]); |
| 321 | final byteWords = s2[2]; |
| 322 | bw += byteWords; |
| 323 | } |
| 324 | String? error; |
| 325 | |
| 326 | return URQRData( |
| 327 | tag: tag, |
| 328 | str: bw, |
| 329 | progress: count == 0 ? 0 : (urqr.length / count), |
| 330 | count: count, |
| 331 | error: error ?? "", |
| 332 | inputs: urqr, |
| 333 | ); |
| 334 | } |
| 335 | |
| 336 | class ProgressPainter extends CustomPainter { |
| 337 | final URQrProgress urQrProgress; |
| 338 | |
| 339 | ProgressPainter({required this.urQrProgress}); |
| 340 | |
| 341 | @override |
| 342 | void paint(Canvas canvas, Size size) { |
| 343 | final c = Offset(size.width / 2.0, size.height / 2.0); |
| 344 | final radius = size.width * 0.9; |
| 345 | final rect = Rect.fromCenter(center: c, width: radius, height: radius); |
| 346 | const fullAngle = 360.0; |
| 347 | var startAngle = 0.0; |
| 348 | for (int i = 0; i < urQrProgress.expectedPartCount.toInt(); i++) { |
| 349 | var sweepAngle = (1 / urQrProgress.expectedPartCount) * fullAngle * pi / 180.0; |
| 350 | drawSector( |
| 351 | canvas, urQrProgress.receivedPartIndexes.contains(i), rect, startAngle, sweepAngle); |
| 352 | startAngle += sweepAngle; |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | void drawSector(Canvas canvas, bool isActive, Rect rect, double startAngle, double sweepAngle) { |
| 357 | final paint = Paint() |
| 358 | ..style = PaintingStyle.stroke |
| 359 | ..strokeWidth = 8 |
| 360 | ..strokeCap = StrokeCap.round |
| 361 | ..strokeJoin = StrokeJoin.round |
| 362 | ..color = isActive ? const Color(0xffff6600) : Colors.white70; |
| 363 | canvas.drawArc(rect, startAngle, sweepAngle, false, paint); |
| 364 | } |
| 365 | |
| 366 | @override |
| 367 | bool shouldRepaint(covariant ProgressPainter oldDelegate) { |
| 368 | return urQrProgress != oldDelegate.urQrProgress; |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | class URQrProgress { |
| 373 | int expectedPartCount; |
| 374 | int processedPartsCount; |
| 375 | List<int> receivedPartIndexes; |
| 376 | double percentage; |
| 377 | |
| 378 | URQrProgress({ |
| 379 | required this.expectedPartCount, |
| 380 | required this.processedPartsCount, |
| 381 | required this.receivedPartIndexes, |
| 382 | required this.percentage, |
| 383 | }); |
| 384 | |
| 385 | bool equals(URQrProgress? progress) { |
| 386 | if (progress == null) { |
| 387 | return false; |
| 388 | } |
| 389 | return processedPartsCount == progress.processedPartsCount; |
| 390 | } |
| 391 | } |