Add lead workflows, PDF signing, AR projects and photo gallery integration

GasTankAR/Views/GalleryView.swift

@@ -60,8 +60,8 @@ struct GalleryView: View {
             PhotoViewer(
                 photo: photo,
                 photos: project.photos.sorted { $0.creationDate > $1.creationDate }
-            ) {
-                delete(photo)
+            ) { selected in
+                delete(selected)
             }
         }
     }
@@ -158,9 +158,10 @@ private struct DrawingStroke {
     var isEraser: Bool
 }
 
-private struct PhotoViewer: View {
+struct PhotoViewer: View {
     let photos: [ProjectPhoto]
-    let onDelete: () -> Void
+    let onDelete: (ProjectPhoto) throws -> Void
+    let usesNavigationStack: Bool
 
     @Environment(\.dismiss) private var dismiss
     @Environment(\.modelContext) private var modelContext
@@ -172,19 +173,36 @@ private struct PhotoViewer: View {
     @State private var drawingColor = Color.red
     @State private var drawingWidth: Double = 0.012
     @State private var imageRevision = 0
+    @State private var deletionError: String?
 
     private var currentPhoto: ProjectPhoto {
         photos[currentIndex]
     }
 
-    init(photo: ProjectPhoto, photos: [ProjectPhoto], onDelete: @escaping () -> Void) {
+    init(photo: ProjectPhoto, photos: [ProjectPhoto], usesNavigationStack: Bool = true,
+         onDelete: @escaping (ProjectPhoto) throws -> Void) {
         self.photos = photos
         self.onDelete = onDelete
+        self.usesNavigationStack = usesNavigationStack
         _currentIndex = State(initialValue: photos.firstIndex(of: photo) ?? 0)
     }
 
     var body: some View {
-        NavigationStack {
+        Group {
+            if usesNavigationStack {
+                NavigationStack { content }
+            } else {
+                content
+            }
+        }
+        .alert("Foto konnte nicht gelöscht werden", isPresented: Binding(
+            get: { deletionError != nil }, set: { if !$0 { deletionError = nil } }
+        )) {
+            Button("OK", role: .cancel) { deletionError = nil }
+        } message: { Text(deletionError ?? "") }
+    }
+
+    private var content: some View {
             TabView(selection: $currentIndex) {
                 ForEach(photos.indices, id: \.self) { index in
                     photoLayout(for: photos[index])
@@ -197,7 +215,7 @@ private struct PhotoViewer: View {
                 ToolbarItem(placement: .topBarLeading) {
                     if isDrawing {
                         EmptyView()
-                    } else {
+                    } else if usesNavigationStack {
                         Button("Fertig") { dismiss() }
                     }
                 }
@@ -213,8 +231,10 @@ private struct PhotoViewer: View {
                         .accessibilityLabel("Zeichnung speichern")
                     } else {
                         Button("Löschen", systemImage: "trash", role: .destructive) {
-                            onDelete()
-                            dismiss()
+                            do {
+                                try onDelete(currentPhoto)
+                                dismiss()
+                            } catch { deletionError = error.localizedDescription }
                         }
                     }
                 }
@@ -250,7 +270,6 @@ private struct PhotoViewer: View {
                 }
             }
             .navigationBarTitleDisplayMode(.inline)
-        }
     }
 
     private func photoLayout(for photo: ProjectPhoto) -> some View {
@@ -619,6 +638,6 @@ private struct PhotoLocationCard: View {
 
 #Preview("Foto-Detail") {
     let photo = PreviewSupport.samplePhoto()
-    PhotoViewer(photo: photo, photos: [photo]) {}
+    PhotoViewer(photo: photo, photos: [photo]) { _ in }
 }
 #endif