From f9aee46bbe7ae78beaf66aa6946e947039032366 Mon Sep 17 00:00:00 2001
From: Shadowfacts <me@shadowfacts.net>
Date: Wed, 20 Mar 2024 12:23:18 -0400
Subject: [PATCH] Asynchronously share video instead of fetching it on the main
 thread

---
 .../Activities/VideoActivityItemSource.swift  | 39 +++++++------------
 1 file changed, 14 insertions(+), 25 deletions(-)

diff --git a/Tusker/Activities/VideoActivityItemSource.swift b/Tusker/Activities/VideoActivityItemSource.swift
index e72ec8d3..5f75da7a 100644
--- a/Tusker/Activities/VideoActivityItemSource.swift
+++ b/Tusker/Activities/VideoActivityItemSource.swift
@@ -10,46 +10,35 @@ import UIKit
 import UniformTypeIdentifiers
 import AVFoundation
 
-class VideoActivityItemSource: NSObject, UIActivityItemSource {
-    let asset: AVAsset
-    let url: URL
+class VideoActivityItemSource: UIActivityItemProvider {
+    private let asset: AVAsset
+    private let url: URL
+    
+    private var tempURL: URL?
     
     init(asset: AVAsset, url: URL) {
         self.asset = asset
         self.url = url
+        
+        super.init(placeholderItem: url)
     }
-    
-    func activityViewControllerPlaceholderItem(_ activityViewController: UIActivityViewController) -> Any {
-        return url
-    }
-    
-    func activityViewController(_ activityViewController: UIActivityViewController, thumbnailImageForActivityType activityType: UIActivity.ActivityType?, suggestedSize size: CGSize) -> UIImage? {
-        #if os(visionOS)
-        #warning("Use async AVAssetImageGenerator.image(at:)")
-        return nil
-        #else
-        let generator = AVAssetImageGenerator(asset: self.asset)
-        generator.appliesPreferredTrackTransform = true
-        if let image = try? generator.copyCGImage(at: .zero, actualTime: nil) {
-            return UIImage(cgImage: image)
-        } else {
-            return nil
+
+    override var item: Any {
+        if let tempURL {
+            return tempURL
         }
-        #endif
-    }
-    
-    func activityViewController(_ activityViewController: UIActivityViewController, itemForActivityType activityType: UIActivity.ActivityType?) -> Any? {
         do {
             let data = try Data(contentsOf: url)
             let tempURL = FileManager.default.temporaryDirectory.appendingPathComponent(url.lastPathComponent)
             try data.write(to: tempURL)
+            self.tempURL = tempURL
             return tempURL
         } catch {
-            return nil
+            return url
         }
     }
     
-    func activityViewController(_ activityViewController: UIActivityViewController, dataTypeIdentifierForActivityType activityType: UIActivity.ActivityType?) -> String {
+    override func activityViewController(_ activityViewController: UIActivityViewController, dataTypeIdentifierForActivityType activityType: UIActivity.ActivityType?) -> String {
         return (UTType(filenameExtension: url.pathExtension) ?? .video).identifier
     }
 }