Merge pull request #102 from factisresearch/codeformat

Add BarcodeFormat to result

android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRView.kt

@@ -116,7 +116,8 @@ class QRView(messenger: BinaryMessenger, id: Int, private val context: Context)
         barcode.decodeContinuous(
                 object : BarcodeCallback {
                     override fun barcodeResult(result: BarcodeResult) {
-                        channel.invokeMethod("onRecognizeQR", result.text)
+                        val code = mapOf("code" to result.text, "type" to result.barcodeFormat.name)
+                        channel.invokeMethod("onRecognizeQR", code)
                     }
 
                     override fun possibleResultPoints(resultPoints: List<ResultPoint>) {}

example/lib/main.dart

@@ -1,3 +1,4 @@
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:qr_code_scanner/qr_code_scanner.dart';
 
@@ -18,7 +19,7 @@ class QRViewExample extends StatefulWidget {
 }
 
 class _QRViewExampleState extends State<QRViewExample> {
-  var qrText = '';
+  Barcode result;
   var flashState = flashOn;
   var cameraState = frontCamera;
   QRViewController controller;
@@ -32,6 +33,13 @@ class _QRViewExampleState extends State<QRViewExample> {
 
   @override
   Widget build(BuildContext context) {
+    String resultText;
+    if (result == null) {
+      resultText = 'No previous result';
+    } else {
+      resultText =
+          'This is the result of scan (${describeEnum(result.format)}): ${result.code}';
+    }
     return Scaffold(
       body: Column(
         children: <Widget>[
@@ -43,7 +51,7 @@ class _QRViewExampleState extends State<QRViewExample> {
               child: Column(
                 mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                 children: <Widget>[
-                  Text('This is the result of scan: $qrText'),
+                  Text(resultText),
                   Row(
                     mainAxisAlignment: MainAxisAlignment.center,
                     crossAxisAlignment: CrossAxisAlignment.center,
@@ -160,7 +168,7 @@ class _QRViewExampleState extends State<QRViewExample> {
     this.controller = controller;
     controller.scannedDataStream.listen((scanData) {
       setState(() {
-        qrText = scanData;
+        result = scanData;
       });
     });
   }

ios/Classes/QRView.swift

@@ -26,8 +26,37 @@ public class QRView:NSObject,FlutterPlatformView {
                 try scanner?.startScanning(resultBlock: { [weak self] codes in
                     if let codes = codes {
                         for code in codes {
+                            var typeString: String;
+                            switch(code.type) {
+                                case AVMetadataObject.ObjectType.aztec:
+                                   typeString = "AZTEC"
+                                case AVMetadataObject.ObjectType.code39:
+                                    typeString = "CODE_39"
+                                case AVMetadataObject.ObjectType.code93:
+                                    typeString = "CODE_93"
+                                case AVMetadataObject.ObjectType.code128:
+                                    typeString = "CODE_128"
+                                case AVMetadataObject.ObjectType.dataMatrix:
+                                    typeString = "DATA_MATRIX"
+                                case AVMetadataObject.ObjectType.ean8:
+                                    typeString = "EAN_8"
+                                case AVMetadataObject.ObjectType.ean13:
+                                    typeString = "EAN_13"
+                                case AVMetadataObject.ObjectType.itf14:
+                                    typeString = "ITF"
+                                case AVMetadataObject.ObjectType.pdf417:
+                                    typeString = "PDF_417"
+                                case AVMetadataObject.ObjectType.qr:
+                                    typeString = "QR_CODE"
+                                case AVMetadataObject.ObjectType.upce:
+                                    typeString = "UPC_E"
+                                default:
+                                    return
+                            }
+
                             guard let stringValue = code.stringValue else { continue }
-                            self?.channel.invokeMethod("onRecognizeQR", arguments: stringValue)
+                            let result = ["code": stringValue, "type": typeString]
+                            self?.channel.invokeMethod("onRecognizeQR", arguments: result)
                         }
                     }
                 })

lib/src/qr_code_scanner.dart

@@ -6,6 +6,86 @@ import 'package:flutter/services.dart';
 
 typedef QRViewCreatedCallback = void Function(QRViewController);
 
+enum BarcodeFormat {
+  /// Aztec 2D barcode format.
+  aztec,
+
+  /// CODABAR 1D format.
+  codabar,
+
+  /// Code 39 1D format.
+  code39,
+
+  /// Code 93 1D format.
+  code93,
+
+  /// Code 128 1D format.
+  code128,
+
+  /// Data Matrix 2D barcode format.
+  dataMatrix,
+
+  /// EAN-8 1D format.
+  ean8,
+
+  /// EAN-13 1D format.
+  ean13,
+
+  /// ITF (Interleaved Two of Five) 1D format.
+  itf,
+
+  /// MaxiCode 2D barcode format.
+  maxicode,
+
+  /// PDF417 format.
+  pdf417,
+
+  /// QR Code 2D barcode format.
+  qrcode,
+
+  /// RSS 14
+  rss14,
+
+  /// RSS EXPANDED
+  rssExpanded,
+
+  /// UPC-A 1D format.
+  upcA,
+
+  /// UPC-E 1D format.
+  upcE,
+
+  /// UPC/EAN extension format. Not a stand-alone format.
+  upcEanExtension
+}
+
+const _formatNames = <String, BarcodeFormat>{
+  'AZTEC': BarcodeFormat.aztec,
+  'CODABAR': BarcodeFormat.codabar,
+  'CODE_39': BarcodeFormat.code39,
+  'CODE_93': BarcodeFormat.code93,
+  'CODE_128': BarcodeFormat.code128,
+  'DATA_MATRIX': BarcodeFormat.dataMatrix,
+  'EAN_8': BarcodeFormat.ean8,
+  'EAN_13': BarcodeFormat.ean13,
+  'ITF': BarcodeFormat.itf,
+  'MAXICODE': BarcodeFormat.maxicode,
+  'PDF_417': BarcodeFormat.pdf417,
+  'QR_CODE': BarcodeFormat.qrcode,
+  'RSS_14': BarcodeFormat.rss14,
+  'RSS_EXPANDED': BarcodeFormat.rssExpanded,
+  'UPC_A': BarcodeFormat.upcA,
+  'UPC_E': BarcodeFormat.upcE,
+  'UPC_EAN_EXTENSION': BarcodeFormat.upcEanExtension,
+};
+
+class Barcode {
+  Barcode(this.code, this.format);
+
+  final String code;
+  final BarcodeFormat format;
+}
+
 class QRView extends StatefulWidget {
   const QRView({
     @required Key key,
@@ -106,7 +186,16 @@ class QRViewController {
         switch (call.method) {
           case scanMethodCall:
             if (call.arguments != null) {
-              _scanUpdateController.sink.add(call.arguments.toString());
+              final args = call.arguments as Map;
+              final code = args['code'] as String;
+              final rawType = args['type'] as String;
+              final format = _formatNames[rawType];
+              if (format != null) {
+                final barcode = Barcode(code, format);
+                _scanUpdateController.sink.add(barcode);
+              } else {
+                throw Exception('Unexpected barcode type $rawType');
+              }
             }
         }
       },
@@ -117,10 +206,10 @@ class QRViewController {
 
   final MethodChannel _channel;
 
-  final StreamController<String> _scanUpdateController =
-      StreamController<String>();
+  final StreamController<Barcode> _scanUpdateController =
+      StreamController<Barcode>();
 
-  Stream<String> get scannedDataStream => _scanUpdateController.stream;
+  Stream<Barcode> get scannedDataStream => _scanUpdateController.stream;
 
   void flipCamera() {
     _channel.invokeMethod('flipCamera');