Reversed file previews so that newer files are on the left where user can see them

enzevalos_iphone/SwiftUI/Compose/AddAttachmentsView.swift

@@ -21,15 +21,10 @@ struct AddAttachmentsView: View {
     
     // properties to handle several sheet views (only one .sheet(...) is allowed)
     @State var showSheet = false
-    @State var sheetState = SheetStates.none {
-        willSet {
-            showSheet = newValue != .none
-        }
-    }
+    @State var currentSheetState: SheetStates?
     
     /// SheetStates to controll several sheet views
     enum SheetStates {
-        case none                   // default
         case imageImport            // user presses imageUploadButton
         case fullScreenFilePreview  // user taps on a file preview
     }
@@ -37,10 +32,12 @@ struct AddAttachmentsView: View {
     /// a func that returns the right sheet content according to the sheetState
     @ViewBuilder
     private func sheetContent() -> some View {
-        switch sheetState {
-        case .imageImport:              // open the gallery and let user pick an image
+        switch currentSheetState {
+        case .imageImport:
+            // open the gallery and let user pick an image
             ImagePicker(image: self.$inputImage)
-        case .fullScreenFilePreview:    // open the attachment in 'fullScreenAttachment' fullscreen
+        case .fullScreenFilePreview:
+            // open the attachment in 'fullScreenAttachment' fullscreen
             if let attachment = fullScreenAttachment {
                 // file name
                 Text(attachment.myName)
@@ -58,14 +55,15 @@ struct AddAttachmentsView: View {
     
     /// a func that returns the right onDismiss parameter according to the sheetState
     private func sheetOnDismiss() {
-        switch sheetState {
-        case .imageImport:      // TODO: currently no inputImage is imported even if user chose one
+        switch currentSheetState {
+        case .imageImport:
+            // TODO: currently no inputImage is imported even if user chose one
             guard let inputImage = inputImage else { return }
             image = Image(uiImage: inputImage)
-            self.sheetState = .none
+            self.currentSheetState = nil
         case .fullScreenFilePreview:
             self.showSheet = false
-            self.sheetState = .none
+            self.currentSheetState = nil
             self.fullScreenAttachment = nil
         default: return
         }
@@ -119,13 +117,13 @@ struct AddAttachmentsView: View {
                 //  Error while loading file
                 print("Error while importing file.")
             }
-        } // end of fileImport
+        }
     }
     
     /// a view that contains the upload button for pictures
     var imageUploadButton: some View {
         Button {
-            self.sheetState = .imageImport
+            self.currentSheetState = .imageImport
             showSheet.toggle()
         } label: {
             // try to imitate SF Symbol "doc.badge.plus"
@@ -148,11 +146,11 @@ struct AddAttachmentsView: View {
     
     /// a view that contains several file previews together with their delete buttons
     var filePreviews: some View {
-        ForEach(model.attachments, id: \.self.myID) { currentFile in
+        ForEach(model.attachments.reversed(), id: \.self.myID) { currentFile in
             ZStack {
                 // file preview using Quicklook
-                // shallDL has to be true here, because QuickLookView then downloads
-                // the file into the Documents Directory
+                // shallDL has to be true here, because QuickLookView will download
+                // the file into the Documents Directory for us
                 // it then uses that DD file to create a preview of the content
                 QuickLookView(name: currentFile.myName, data: currentFile.myData, shallDL: true)
                     .padding(3)
@@ -166,6 +164,7 @@ struct AddAttachmentsView: View {
                     // delete button in upper right corner
                     Button {
                         // remove from attachments list and remove from Documents Directory
+                        // to keep DD clean
                         if let deleteIndex = model.attachments.firstIndex(of: currentFile) {
                             model.attachments[deleteIndex].removeFileFromDocumentsDirectory()
                             model.attachments.remove(at: deleteIndex)