Added loading view when getting photo album assets

Author: martinmitrevski

Sources/StreamChatSwiftUI/ChatChannel/Composer/AttachmentPickerView.swift

@@ -38,13 +38,17 @@ public struct AttachmentPickerView<Factory: ViewFactory>: View {
             if selectedPickerState == .photos {
                 if let assets = photoLibraryAssets,
                    let collection = PHFetchResultCollection(fetchResult: assets) {
-                    viewFactory.makePhotoAttachmentPickerView(
-                        assets: collection,
-                        onAssetTap: onAssetTap,
-                        isAssetSelected: isAssetSelected
-                    )
+                    if !collection.isEmpty {
+                        viewFactory.makePhotoAttachmentPickerView(
+                            assets: collection,
+                            onAssetTap: onAssetTap,
+                            isAssetSelected: isAssetSelected
+                        )
+                    } else {
+                        viewFactory.makeAssetsAccessPermissionView()
+                    }
                 } else {
-                    viewFactory.makeAssetsAccessPermissionView()
+                    LoadingView()
                 }
 
             } else if selectedPickerState == .files {

Sources/StreamChatSwiftUI/ChatChannel/Composer/MessageComposerViewModel.swift

@@ -383,12 +383,15 @@ open class MessageComposerViewModel: ObservableObject {
                 log.debug("Access to photos granted.")
                 let fetchOptions = PHFetchOptions()
                 fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
-                DispatchQueue.main.async { [unowned self] in
-                    self.imageAssets = PHAsset.fetchAssets(with: fetchOptions)
+                let assets = PHAsset.fetchAssets(with: fetchOptions)
+                DispatchQueue.main.asyncAfter(deadline: .now() + 0.25) { [weak self] in
+                    self?.imageAssets = assets
                 }
             case .denied, .restricted:
+                self.imageAssets = PHFetchResult<PHAsset>()
                 log.debug("Access to photos is denied, showing the no permissions screen.")
             case .notDetermined:
+                self.imageAssets = PHFetchResult<PHAsset>()
                 log.debug("Access to photos is still not determined.")
             @unknown default:
                 log.debug("Unknown authorization status.")