initial commit

ios_client/EncryptedChat/Views/Chat/ImageViewerView.swift

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+import SwiftUI
+
+struct ImageViewerView: View {
+    let imageData: Data
+    @State private var scale: CGFloat = 1.0
+    @Environment(\.dismiss) private var dismiss
+
+    var body: some View {
+        NavigationStack {
+            GeometryReader { geo in
+                if let uiImage = UIImage(data: imageData) {
+                    Image(uiImage: uiImage)
+                        .resizable()
+                        .aspectRatio(contentMode: .fit)
+                        .scaleEffect(scale)
+                        .gesture(
+                            MagnifyGesture()
+                                .onChanged { value in
+                                    scale = value.magnification
+                                }
+                                .onEnded { _ in
+                                    withAnimation {
+                                        scale = max(1.0, min(scale, 5.0))
+                                    }
+                                }
+                        )
+                        .onTapGesture(count: 2) {
+                            withAnimation {
+                                scale = scale > 1 ? 1 : 2
+                            }
+                        }
+                        .frame(width: geo.size.width, height: geo.size.height)
+                }
+            }
+            .toolbar {
+                ToolbarItem(placement: .topBarTrailing) {
+                    Button("Done") { dismiss() }
+                }
+            }
+            .background(.black)
+        }
+    }
+}