From 56a8f07a9f9dfafe64061024b26a9af9330ff5e3 Mon Sep 17 00:00:00 2001
From: Simon Rieger <simono41@brothertec.eu>
Date: Fri, 15 Dec 2023 17:20:09 +0100
Subject: [PATCH] Add Camera Support and support for use fotos

---
 .../project.pbxproj                           |   2 +
 intelliScan-analytic-engine/ContentView.swift | 112 +++++++++++++++++-
 2 files changed, 109 insertions(+), 5 deletions(-)

diff --git a/intelliScan-analytic-engine.xcodeproj/project.pbxproj b/intelliScan-analytic-engine.xcodeproj/project.pbxproj
index 01a3bd3..f9cf7e4 100644
--- a/intelliScan-analytic-engine.xcodeproj/project.pbxproj
+++ b/intelliScan-analytic-engine.xcodeproj/project.pbxproj
@@ -424,6 +424,7 @@
 				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_KEY_NSCameraUsageDescription = "Wir benötigen Zugriff auf Ihre Kamera, um Bilder für die Texterkennung aufzunehmen.";
 				"INFOPLIST_KEY_UIApplicationSceneManifest_Generation[sdk=iphoneos*]" = YES;
 				"INFOPLIST_KEY_UIApplicationSceneManifest_Generation[sdk=iphonesimulator*]" = YES;
 				"INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents[sdk=iphoneos*]" = YES;
@@ -462,6 +463,7 @@
 				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_KEY_NSCameraUsageDescription = "Wir benötigen Zugriff auf Ihre Kamera, um Bilder für die Texterkennung aufzunehmen.";
 				"INFOPLIST_KEY_UIApplicationSceneManifest_Generation[sdk=iphoneos*]" = YES;
 				"INFOPLIST_KEY_UIApplicationSceneManifest_Generation[sdk=iphonesimulator*]" = YES;
 				"INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents[sdk=iphoneos*]" = YES;
diff --git a/intelliScan-analytic-engine/ContentView.swift b/intelliScan-analytic-engine/ContentView.swift
index 7b218ea..bdb51e6 100644
--- a/intelliScan-analytic-engine/ContentView.swift
+++ b/intelliScan-analytic-engine/ContentView.swift
@@ -6,19 +6,121 @@
 //
 
 import SwiftUI
+import Vision
 
 struct ContentView: View {
+    @State private var recognizedText = ""
+    @State private var showingImagePicker = false
+    @State private var showingCamera = false
+    @State private var selectedImage: UIImage?
+
     var body: some View {
         VStack {
-            Image(systemName: "globe")
-                .imageScale(.large)
-                .foregroundStyle(.tint)
-            Text("Hello, world!")
+            Button("Bild auswählen") {
+                self.showingImagePicker.toggle()
+            }
+            .sheet(isPresented: $showingImagePicker, onDismiss: recognizeText) {
+                ImagePicker(selectedImage: self.$selectedImage, sourceType: .photoLibrary)
+            }
+
+            Button("Kamera verwenden") {
+                self.showingCamera.toggle()
+            }
+            .sheet(isPresented: $showingCamera, onDismiss: recognizeText) {
+                ImagePicker(selectedImage: self.$selectedImage, sourceType: .camera)
+            }
+
+            if let selectedImage = selectedImage {
+                Image(uiImage: selectedImage)
+                    .resizable()
+                    .scaledToFit()
+                    .frame(width: 200, height: 200)
+                    .padding()
+
+                Text("Erkannter Text:")
+                Text(recognizedText)
+                    .padding()
+            }
+        }
+    }
+
+    func recognizeText() {
+        guard let selectedImage = selectedImage, let cgImage = selectedImage.cgImage else {
+            return
+        }
+
+        let request = VNRecognizeTextRequest(completionHandler: { (request, error) in
+            guard let observations = request.results as? [VNRecognizedTextObservation] else { return }
+
+            var recognizedText = ""
+            for observation in observations {
+                guard let topCandidate = observation.topCandidates(1).first else { continue }
+                recognizedText += topCandidate.string + "\n"
+            }
+
+            self.recognizedText = recognizedText
+        })
+
+        let requestHandler = VNImageRequestHandler(cgImage: cgImage, options: [:])
+
+        do {
+            try requestHandler.perform([request])
+        } catch {
+            print("Error performing OCR: \(error)")
         }
-        .padding()
     }
 }
 
+struct ContentView_Previews: PreviewProvider {
+    static var previews: some View {
+        ContentView()
+    }
+}
+
+struct ImagePicker: UIViewControllerRepresentable {
+    @Binding var selectedImage: UIImage?
+    var sourceType: UIImagePickerController.SourceType
+
+    class Coordinator: NSObject, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
+        let parent: ImagePicker
+
+        init(parent: ImagePicker) {
+            self.parent = parent
+        }
+
+        func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
+            if let uiImage = info[.originalImage] as? UIImage {
+                parent.selectedImage = uiImage
+            }
+
+            parent.presentationMode.wrappedValue.dismiss()
+        }
+    }
+
+    var imagePickerController: UIImagePickerController
+    @Environment(\.presentationMode) var presentationMode
+
+    init(selectedImage: Binding<UIImage?>, sourceType: UIImagePickerController.SourceType) {
+        _selectedImage = selectedImage
+        self.sourceType = sourceType
+        imagePickerController = UIImagePickerController()
+        imagePickerController.sourceType = sourceType
+        imagePickerController.allowsEditing = false
+    }
+
+    func makeUIViewController(context: Context) -> UIImagePickerController {
+        imagePickerController.delegate = context.coordinator
+        return imagePickerController
+    }
+
+    func updateUIViewController(_ uiViewController: UIImagePickerController, context: Context) {}
+
+    func makeCoordinator() -> Coordinator {
+        return Coordinator(parent: self)
+    }
+}
+
+
 #Preview {
     ContentView()
 }