Implemented generating EPC QR code on iOS

EpcQrCodeiOSApp/EpcQrCodeiOSApp.xcodeproj/project.pbxproj

@@ -3,10 +3,13 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 50;
+	objectVersion = 52;
 	objects = {
 
 /* Begin PBXBuildFile section */
+		368A7CDD2560A48900252D96 /* LabelledTextField.swift in Sources */ = {isa = PBXBuildFile; fileRef = 368A7CDC2560A48900252D96 /* LabelledTextField.swift */; };
+		368A7CEC2560A93500252D96 /* Localizable.strings in Resources */ = {isa = PBXBuildFile; fileRef = 368A7CEE2560A93500252D96 /* Localizable.strings */; };
+		368A7CFA2560B2A000252D96 /* ZXingObjC in Frameworks */ = {isa = PBXBuildFile; productRef = 368A7CF92560B2A000252D96 /* ZXingObjC */; };
 		7555FF7F242A565900829871 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7555FF7E242A565900829871 /* AppDelegate.swift */; };
 		7555FF81242A565900829871 /* SceneDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7555FF80242A565900829871 /* SceneDelegate.swift */; };
 		7555FF83242A565900829871 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7555FF82242A565900829871 /* ContentView.swift */; };
@@ -51,6 +54,9 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		368A7CDC2560A48900252D96 /* LabelledTextField.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LabelledTextField.swift; sourceTree = "<group>"; };
+		368A7CED2560A93500252D96 /* en */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = en; path = en.lproj/Localizable.strings; sourceTree = "<group>"; };
+		368A7CF12560A94C00252D96 /* de */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = de; path = de.lproj/Localizable.strings; sourceTree = "<group>"; };
 		7555FF7B242A565900829871 /* EpcQrCodeiOSApp.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = EpcQrCodeiOSApp.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		7555FF7E242A565900829871 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		7555FF80242A565900829871 /* SceneDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SceneDelegate.swift; sourceTree = "<group>"; };
@@ -74,6 +80,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				7555FFB2242A642300829871 /* EpcQrCode.framework in Frameworks */,
+				368A7CFA2560B2A000252D96 /* ZXingObjC in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -125,6 +132,8 @@
 				7555FF89242A565B00829871 /* LaunchScreen.storyboard */,
 				7555FF8C242A565B00829871 /* Info.plist */,
 				7555FF86242A565B00829871 /* Preview Content */,
+				368A7CDC2560A48900252D96 /* LabelledTextField.swift */,
+				368A7CEE2560A93500252D96 /* Localizable.strings */,
 			);
 			path = EpcQrCodeiOSApp;
 			sourceTree = "<group>";
@@ -181,6 +190,9 @@
 			dependencies = (
 			);
 			name = EpcQrCodeiOSApp;
+			packageProductDependencies = (
+				368A7CF92560B2A000252D96 /* ZXingObjC */,
+			);
 			productName = EpcQrCodeiOSApp;
 			productReference = 7555FF7B242A565900829871 /* EpcQrCodeiOSApp.app */;
 			productType = "com.apple.product-type.application";
@@ -251,8 +263,12 @@
 			knownRegions = (
 				en,
 				Base,
+				de,
 			);
 			mainGroup = 7555FF72242A565900829871;
+			packageReferences = (
+				368A7CF82560B2A000252D96 /* XCRemoteSwiftPackageReference "zxingify-objc" */,
+			);
 			productRefGroup = 7555FF7C242A565900829871 /* Products */;
 			projectDirPath = "";
 			projectRoot = "";
@@ -270,6 +286,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				7555FF8B242A565B00829871 /* LaunchScreen.storyboard in Resources */,
+				368A7CEC2560A93500252D96 /* Localizable.strings in Resources */,
 				7555FF88242A565B00829871 /* Preview Assets.xcassets in Resources */,
 				7555FF85242A565B00829871 /* Assets.xcassets in Resources */,
 			);
@@ -316,6 +333,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				368A7CDD2560A48900252D96 /* LabelledTextField.swift in Sources */,
 				7555FF7F242A565900829871 /* AppDelegate.swift in Sources */,
 				7555FF81242A565900829871 /* SceneDelegate.swift in Sources */,
 				7555FF83242A565900829871 /* ContentView.swift in Sources */,
@@ -354,6 +372,15 @@
 /* End PBXTargetDependency section */
 
 /* Begin PBXVariantGroup section */
+		368A7CEE2560A93500252D96 /* Localizable.strings */ = {
+			isa = PBXVariantGroup;
+			children = (
+				368A7CED2560A93500252D96 /* en */,
+				368A7CF12560A94C00252D96 /* de */,
+			);
+			name = Localizable.strings;
+			sourceTree = "<group>";
+		};
 		7555FF89242A565B00829871 /* LaunchScreen.storyboard */ = {
 			isa = PBXVariantGroup;
 			children = (
@@ -369,6 +396,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++14";
@@ -429,6 +457,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++14";
@@ -643,6 +672,25 @@
 			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
+
+/* Begin XCRemoteSwiftPackageReference section */
+		368A7CF82560B2A000252D96 /* XCRemoteSwiftPackageReference "zxingify-objc" */ = {
+			isa = XCRemoteSwiftPackageReference;
+			repositoryURL = "https://github.com/zxingify/zxingify-objc";
+			requirement = {
+				kind = upToNextMajorVersion;
+				minimumVersion = 3.6.7;
+			};
+		};
+/* End XCRemoteSwiftPackageReference section */
+
+/* Begin XCSwiftPackageProductDependency section */
+		368A7CF92560B2A000252D96 /* ZXingObjC */ = {
+			isa = XCSwiftPackageProductDependency;
+			package = 368A7CF82560B2A000252D96 /* XCRemoteSwiftPackageReference "zxingify-objc" */;
+			productName = ZXingObjC;
+		};
+/* End XCSwiftPackageProductDependency section */
 	};
 	rootObject = 7555FF73242A565900829871 /* Project object */;
 }

EpcQrCodeiOSApp/EpcQrCodeiOSApp/ContentView.swift

@@ -1,13 +1,119 @@
 import SwiftUI
 import EpcQrCode
+import ZXingObjC
 
 
 struct ContentView: View {
+    
+    static private let ImageWidth: CGFloat = 350
+    
+    static private let ImageHeight = Self.ImageWidth
+    
+    
+    @State private var receiver: String = ""
+    
+    @State private var iban: String = ""
+    
+    @State private var bic: String = ""
+    
+    @State private var amount: String = ""
+    
+    @State private var reference: String = ""
+    
+    
+    @State private var generatedQrCode: UIImage? = nil
+    
+    
     var body: some View {
-        Text(MppTest().showMessage())
+        VStack {
+            Form {
+                Section {
+                    LabelledTextField("Receiver", $receiver)
+                }
+                
+                Section {
+                    LabelledTextField("IBAN", $iban)
+                    
+                    LabelledTextField("BIC", $bic)
+                }
+                
+                Section {
+                    HStack {
+                        Text("Amount")
+                        
+                        Spacer()
+                        
+                        TextField("", text: $amount)
+                            .multilineTextAlignment(.trailing)
+                            .keyboardType(.numberPad)
+                    }
+                    
+                    VStack(alignment: .leading) {
+                        Text("Reference")
+                        
+                        TextField("", text: $reference)
+                    }
+                }
+                
+                Section {
+                    Button(action: self.generateQRCode) {
+                        HStack {
+                            Spacer()
+                            
+                            Text("Generate")
+                            
+                            Spacer()
+                        }
+                    }
+                }
+                
+                if let generatedQrCode = generatedQrCode {
+                    Section {
+                        VStack(alignment: .center) {
+                            Image(uiImage: generatedQrCode)
+                                .resizable()
+                        }
+                    }
+                }
+            }
+        }
+    }
+    
+    
+    private func generateQRCode() {
+        let creator = EpcQrCodeCreator()
+        let param = CreatorParam(receiverName: receiver, iban: iban, bic: bic, amount: map(amount), reference: reference, noteToUser: nil, encoding: .utf8)
+        
+        let qrCodeContent = creator.generateAsString(param: param)
+        
+        self.generatedQrCode = generateQRCode(qrCodeContent)
+    }
+    
+    private func map(_ amount: String) -> KotlinDouble? {
+        if let double = Double(amount.replacingOccurrences(of: ",", with: "."))  {
+            return KotlinDouble(double: double)
+        }
+        
+        return nil
+    }
+    
+    private func generateQRCode(_ informationToEncode: String) -> UIImage? {
+        let writer = ZXQRCodeWriter()
+        
+        let hints = ZXEncodeHints()
+        hints.errorCorrectionLevel = ZXQRCodeErrorCorrectionLevel.errorCorrectionLevelM()
+        
+        if let result = try? writer.encode(informationToEncode, format: kBarcodeFormatQRCode, width: Int32(Self.ImageWidth), height: Int32(Self.ImageHeight), hints: hints) {
+            if let cgImage = ZXImage(matrix: result)?.cgimage {
+                return UIImage(cgImage: cgImage)
+            }
+        }
+
+        return nil
     }
 }
 
+
 struct ContentView_Previews: PreviewProvider {
     static var previews: some View {
         ContentView()

EpcQrCodeiOSApp/EpcQrCodeiOSApp/LabelledTextField.swift

@@ -0,0 +1,42 @@
+import SwiftUI
+
+
+struct LabelledTextField: View {
+    
+    private let label: LocalizedStringKey
+    
+    private var value: Binding<String>
+    
+    private let placeholder: LocalizedStringKey
+    
+    
+    init(_ label: LocalizedStringKey, _ value: Binding<String>, _ placeholder: LocalizedStringKey = "") {
+        self.label = label
+        
+        self.value = value
+        
+        self.placeholder = placeholder
+    }
+    
+
+    var body: some View {
+        HStack {
+            Text(label)
+            
+            Spacer()
+            
+            TextField(placeholder, text: value)
+                .multilineTextAlignment(.trailing)
+        }
+    }
+
+}
+
+
+struct LabelledTextField_Previews: PreviewProvider {
+
+    static var previews: some View {
+        LabelledTextField("Label", .constant("Value"))
+    }
+
+}

EpcQrCodeiOSApp/EpcQrCodeiOSApp/de.lproj/LaunchScreen.strings

@@ -0,0 +1 @@
+

EpcQrCodeiOSApp/EpcQrCodeiOSApp/de.lproj/Localizable.strings

@@ -0,0 +1,8 @@
+
+"Receiver" = "Empfänger";
+"IBAN" = "IBAN";
+"BIC" = "BIC";
+"Amount" = "Betrag";
+"Reference" = "Verwendungszweck";
+
+"Generate" = "Erzeugen";

EpcQrCodeiOSApp/EpcQrCodeiOSApp/en.lproj/Localizable.strings

@@ -0,0 +1,8 @@
+
+"Receiver" = "Receiver";
+"IBAN" = "IBAN";
+"BIC" = "BIC";
+"Amount" = "Amount";
+"Reference" = "Reference";
+
+"Generate" = "Generate";