New: Add function "drop to import"

Open Wallpaper Engine/ContentView/Components/WallpaperExplorer.swift

@@ -8,11 +8,14 @@
 import SwiftUI
 
 struct WallpaperExplorer: SubviewOfContentView {
+
     @ObservedObject var viewModel: ContentViewModel
     @ObservedObject var wallpaperViewModel: WallpaperViewModel
 
     @State var imageScaleIndex: Int = -1
     @State var selectedIndex: Int!
+
+    @State var fileURL: URL?
 
     init(contentViewModel viewModel: ContentViewModel, wallpaperViewModel: WallpaperViewModel) {
         self.viewModel = viewModel
@@ -96,7 +99,8 @@ struct WallpaperExplorer: SubviewOfContentView {
                 }
                 .padding(.bottom)
             }
-        }    }
+        }
+            }
 }
 
 // MARK: - View Modifiers Extension

Open Wallpaper Engine/ContentView/ContentView.swift

@@ -49,6 +49,7 @@ struct ContentView: View {
                                 .animation(.spring(), value: viewModel.isFilterReveal)
 
                                 WallpaperExplorer(contentViewModel: viewModel, wallpaperViewModel: wallpaperViewModel)
+                                .onDrop(of: [.fileURL], delegate: viewModel)
                                 .contextMenu {
                                     ExplorerGlobalMenu(contentViewModel: viewModel, wallpaperViewModel: wallpaperViewModel)
                                 }

Open Wallpaper Engine/ContentView/ViewModels/ContentViewModel.swift

@@ -6,8 +6,9 @@
 //
 
 import SwiftUI
+import UniformTypeIdentifiers
 
-class ContentViewModel: ObservableObject {
+class ContentViewModel: ObservableObject, DropDelegate {
     @AppStorage("FilterReveal") var isFilterReveal = false
     @AppStorage("WallpaperURLs") var wallpaperUrls = [URL]()
     @AppStorage("SelectedIndex") var selectedIndex = 0
@@ -104,6 +105,46 @@ class ContentViewModel: ObservableObject {
         self.importAlertError = error
         self.importAlertPresented = true
     }
+
+    func dropUpdated(info: DropInfo) -> DropProposal? {
+        let proposal = DropProposal(operation: .copy)
+        return proposal
+    }
+
+    func performDrop(info: DropInfo) -> Bool {
+        guard let itemProvider = info.itemProviders(for: [UTType.fileURL]).first
+        else {
+            alertImportModal(which: .unkown)
+            return false
+        }
+        itemProvider.loadItem(forTypeIdentifier: UTType.fileURL.identifier, options: nil) { [weak self] item, _ in
+            guard let data = item as? Data, let url = URL(dataRepresentation: data, relativeTo: nil)
+            else {
+                self?.alertImportModal(which: .unkown)
+                return
+            }
+            // Do something with the file url
+            // remember to dispatch on main in case of a @State change
+            guard let wallpaperFolder = try? FileWrapper(url: url)
+            else{
+                self?.alertImportModal(which: .unkown)
+                return
+            }
+            guard wallpaperFolder.fileWrappers?["project.json"] != nil
+            else{
+                self?.alertImportModal(which: .doesNotContainWallpaper)
+                return
+            }
+            DispatchQueue.main.async {
+                try? FileManager.default.copyItem(
+                    at: url,
+                    to: FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
+                        .appending(path: url.lastPathComponent)
+                )
+            }
+        }
+        return true
+    }
 }
 
 extension Array: RawRepresentable where Element: Codable {