Fix empty share sheet when sharing a video from the full-screen media viewer (#1418)

Author: testableapple

CHANGELOG.md

@@ -15,6 +15,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Redesign the thread replies divider in the message replies list [#1354](https://github.com/GetStream/stream-chat-swiftui/pull/1354)
 
 ### 🐞 Fixed
+- Fix empty share sheet when sharing a video from the full-screen media viewer [#1418](https://github.com/GetStream/stream-chat-swiftui/pull/1418)
 - Fix swipe-to-reply icon layout for outgoing messages and RTL [#1402](https://github.com/GetStream/stream-chat-swiftui/pull/1402)
 - Fix unwanted border on the Edit button in Channel Info [#1402](https://github.com/GetStream/stream-chat-swiftui/pull/1402)
 - Fix send button icon not mirroring in RTL layouts [#1397](https://github.com/GetStream/stream-chat-swiftui/pull/1397)

Sources/StreamChatSwiftUI/ChatMessageList/Gallery/MediaViewer.swift

@@ -110,6 +110,7 @@ public struct MediaViewer<Factory: ViewFactory>: View {
                     viewFactory.makeMediaViewerFooterView(
                         options: MediaViewerFooterViewOptions(
                             shareContent: sharingContent,
+                            shareFallbackURL: sharingFallbackURL,
                             selected: selected,
                             totalCount: mediaAttachments.count,
                             gridShown: $gridShown
@@ -151,6 +152,14 @@ public struct MediaViewer<Factory: ViewFactory>: View {
             []
         }
     }
+
+    /// Used when there is no in-memory ``UIImage`` (videos never populate ``loadedImages``; images may still be loading).
+    private var sharingFallbackURL: URL? {
+        guard loadedImages[selected] == nil,
+              selected >= 0,
+              selected < mediaAttachments.count else { return nil }
+        return mediaAttachments[selected].url
+    }
 }
 
 struct GridMediaView<Factory: ViewFactory>: View {
@@ -192,20 +201,28 @@ public struct MediaViewerFooterView: View {
     @Injected(\.tokens) private var tokens
 
     let shareContent: [UIImage]
+    let shareFallbackURL: URL?
     let selected: Int
     let totalCount: Int
     @Binding var gridShown: Bool
 
-    public init(shareContent: [UIImage], selected: Int, totalCount: Int, gridShown: Binding<Bool>) {
+    public init(
+        shareContent: [UIImage],
+        shareFallbackURL: URL? = nil,
+        selected: Int,
+        totalCount: Int,
+        gridShown: Binding<Bool>
+    ) {
         self.shareContent = shareContent
+        self.shareFallbackURL = shareFallbackURL
         self.selected = selected
         self.totalCount = totalCount
         _gridShown = gridShown
     }
 
     public var body: some View {
         HStack {
-            ShareButtonView(content: shareContent)
+            ShareButtonView(content: shareActivityItems)
 
             Spacer()
 
@@ -228,6 +245,16 @@ public struct MediaViewerFooterView: View {
         .frame(height: 48 + tokens.spacingSm * 2)
         .background(Color(colors.backgroundCoreElevation1))
     }
+
+    private var shareActivityItems: [Any] {
+        if !shareContent.isEmpty {
+            return shareContent
+        }
+        if let shareFallbackURL {
+            return [shareFallbackURL]
+        }
+        return []
+    }
 }
 
 // MARK: - Toolbar

Sources/StreamChatSwiftUI/ViewFactory/DefaultViewFactory.swift

@@ -395,6 +395,7 @@ extension ViewFactory {
     ) -> some View {
         MediaViewerFooterView(
             shareContent: options.shareContent,
+            shareFallbackURL: options.shareFallbackURL,
             selected: options.selected,
             totalCount: options.totalCount,
             gridShown: options.gridShown

Sources/StreamChatSwiftUI/ViewFactory/Options/AttachmentViewFactoryOptions.swift

@@ -310,15 +310,24 @@ public final class MediaViewerToolbarModifierOptions: Sendable {
 public final class MediaViewerFooterViewOptions: Sendable {
     /// The content available for sharing (e.g. loaded images).
     public let shareContent: [UIImage]
+    /// URL to share when ``shareContent`` is empty (e.g. video attachments, or an image still loading).
+    public let shareFallbackURL: URL?
     /// The currently selected media index (zero-based).
     public let selected: Int
     /// The total number of media attachments.
     public let totalCount: Int
     /// Binding that controls whether the grid sheet is shown.
     public let gridShown: Binding<Bool>
 
-    public init(shareContent: [UIImage], selected: Int, totalCount: Int, gridShown: Binding<Bool>) {
+    public init(
+        shareContent: [UIImage],
+        shareFallbackURL: URL? = nil,
+        selected: Int,
+        totalCount: Int,
+        gridShown: Binding<Bool>
+    ) {
         self.shareContent = shareContent
+        self.shareFallbackURL = shareFallbackURL
         self.selected = selected
         self.totalCount = totalCount
         self.gridShown = gridShown