Save media

Extensions/AVURLAsset+Extensions.swift

@@ -0,0 +1,54 @@
+// Copyright © 2021 Metabolist. All rights reserved.
+
+import AVFoundation
+
+enum AssetExportError: Error {
+    case exportSetup
+    case export
+}
+
+extension AVURLAsset {
+    func exportWithoutAudioTrack(completion: @escaping ((Result<URL, AssetExportError>) -> Void)) {
+        let composition = AVMutableComposition()
+        let exportDirectory = FileManager.default.temporaryDirectory.appendingPathComponent(UUID().uuidString)
+
+        guard let sourceVideoTrack = tracks(withMediaType: .video).first,
+              let compositionVideoTrack = composition.addMutableTrack(
+                withMediaType: .video,
+                preferredTrackID: kCMPersistentTrackID_Invalid),
+              case .success = Result(catching: {
+                try compositionVideoTrack.insertTimeRange(
+                    CMTimeRange(start: .zero, duration: duration),
+                    of: sourceVideoTrack, at: .zero)
+              }),
+              let exportSession = AVAssetExportSession(
+                asset: composition,
+                presetName: AVAssetExportPresetHighestQuality),
+              exportSession.supportedFileTypes.contains(.mp4),
+              case .success = Result(catching: {
+                try FileManager.default.createDirectory(
+                    at: exportDirectory,
+                    withIntermediateDirectories: false)
+              })
+        else {
+            completion(.failure(.exportSetup))
+
+            return
+        }
+
+        let exportURL = exportDirectory.appendingPathComponent(url.lastPathComponent)
+
+        exportSession.outputFileType = AVFileType.mp4
+        exportSession.outputURL = exportURL
+        exportSession.timeRange = CMTimeRange(start: .zero, duration: duration)
+        exportSession.exportAsynchronously {
+            guard exportSession.status == .completed else {
+                completion(.failure(.export))
+
+                return
+            }
+
+            completion(.success(exportURL))
+        }
+    }
+}

Localizations/Localizable.strings

@@ -39,6 +39,7 @@
 "attachment.edit.thumbnail.prompt" = "Drag the circle on the preview to choose the focal point which will always be in view on all thumbnails";
 "attachment.sensitive-content" = "Sensitive content";
 "attachment.media-hidden" = "Media hidden";
+"attachment.unable-to-export-media" = "Unable to export media";
 "bookmarks" = "Bookmarks";
 "camera-access.title" = "Camera access needed";
 "camera-access.description" = "Open system settings to allow camera access";

Metatext.xcodeproj/project.pbxproj

@@ -51,6 +51,7 @@
 		D059373E25AB8D5200754FDF /* CompositionPollOptionView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D059373D25AB8D5200754FDF /* CompositionPollOptionView.swift */; };
 		D059373F25AB8D5200754FDF /* CompositionPollOptionView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D059373D25AB8D5200754FDF /* CompositionPollOptionView.swift */; };
 		D059376125ABE2E800754FDF /* XMLUnescaper.swift in Sources */ = {isa = PBXBuildFile; fileRef = D059376025ABE2E800754FDF /* XMLUnescaper.swift */; };
+		D05E688525B55AE8001FB2C6 /* AVURLAsset+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = D05E688425B55AE8001FB2C6 /* AVURLAsset+Extensions.swift */; };
 		D0625E59250F092900502611 /* StatusListCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = D0625E58250F092900502611 /* StatusListCell.swift */; };
 		D0625E5D250F0B5C00502611 /* StatusContentConfiguration.swift in Sources */ = {isa = PBXBuildFile; fileRef = D0625E5C250F0B5C00502611 /* StatusContentConfiguration.swift */; };
 		D06BC5E625202AD90079541D /* ProfileViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D06BC5E525202AD90079541D /* ProfileViewController.swift */; };
@@ -218,6 +219,7 @@
 		D059373225AAEA7000754FDF /* CompositionPollView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CompositionPollView.swift; sourceTree = "<group>"; };
 		D059373D25AB8D5200754FDF /* CompositionPollOptionView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CompositionPollOptionView.swift; sourceTree = "<group>"; };
 		D059376025ABE2E800754FDF /* XMLUnescaper.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = XMLUnescaper.swift; sourceTree = "<group>"; };
+		D05E688425B55AE8001FB2C6 /* AVURLAsset+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "AVURLAsset+Extensions.swift"; sourceTree = "<group>"; };
 		D0625E58250F092900502611 /* StatusListCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StatusListCell.swift; sourceTree = "<group>"; };
 		D0625E5C250F0B5C00502611 /* StatusContentConfiguration.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StatusContentConfiguration.swift; sourceTree = "<group>"; };
 		D0666A2124C677B400F3F04B /* Tests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = Tests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -569,6 +571,7 @@
 			isa = PBXGroup;
 			children = (
 				D01C6FAB252024BD003D0300 /* Array+Extensions.swift */,
+				D05E688425B55AE8001FB2C6 /* AVURLAsset+Extensions.swift */,
 				D0F0B135251AA12700942152 /* CollectionItem+Extensions.swift */,
 				D0C7D46E24F76169001EBDBB /* KingfisherOptionsInfo+Extensions.swift */,
 				D0C7D46B24F76169001EBDBB /* NSMutableAttributedString+Extensions.swift */,
@@ -834,6 +837,7 @@
 				D0FE1C8F253686F9003EF1EB /* PlayerView.swift in Sources */,
 				D0CE9F87258B076900E3A6B6 /* AttachmentUploadView.swift in Sources */,
 				D0F0B113251A86A000942152 /* AccountContentConfiguration.swift in Sources */,
+				D05E688525B55AE8001FB2C6 /* AVURLAsset+Extensions.swift in Sources */,
 				D036AA02254B6101009094DF /* NotificationListCell.swift in Sources */,
 				D08B8D42253F92B600B1EBEF /* ImagePageViewController.swift in Sources */,
 				D01F41D924F880C400D55A2D /* TouchFallthroughTextView.swift in Sources */,

Supporting Files/Info.plist

@@ -2,10 +2,6 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
-	<key>NSMicrophoneUsageDescription</key>
-	<string>Enables Metatext to take videos and add them to your posts.</string>
-	<key>NSCameraUsageDescription</key>
-	<string>Enables Metatext to take photos and videos and add them to your posts.</string>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleExecutable</key>
@@ -24,6 +20,14 @@
 	<string>1</string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
+	<key>NSCameraUsageDescription</key>
+	<string>Enables Metatext to take photos and videos and add them to your posts</string>
+	<key>NSMicrophoneUsageDescription</key>
+	<string>Enables Metatext to take videos and add them to your posts</string>
+	<key>NSPhotoLibraryAddUsageDescription</key>
+	<string>Enables Metatext to add items to your Photo Library</string>
+	<key>NSPhotoLibraryUsageDescription</key>
+	<string>Enables Metatext to access photos from your library and add them to your posts</string>
 	<key>UIApplicationSceneManifest</key>
 	<dict>
 		<key>UIApplicationSupportsMultipleScenes</key>

View Controllers/ImagePageViewController.swift

@@ -48,6 +48,12 @@ final class ImagePageViewController: UIPageViewController {
             systemItem: .close,
             primaryAction: UIAction { [weak self] _ in self?.presentingViewController?.dismiss(animated: true) })
 
+        navigationItem.rightBarButtonItem = .init(
+            systemItem: .action,
+            primaryAction: UIAction { [weak self] _ in
+                (self?.viewControllers?.first as? ImageViewController)?.presentActivityViewController()
+            })
+
         navigationController?.barHideOnTapGestureRecognizer.addTarget(
             self,
             action: #selector(toggleDescriptionVisibility))

View Controllers/ImageViewController.swift

@@ -1,5 +1,6 @@
 // Copyright © 2020 Metabolist. All rights reserved.
 
+import AVFoundation
 import Kingfisher
 import UIKit
 import ViewModels
@@ -146,6 +147,44 @@ extension ImageViewController {
             self.descriptionBackgroundView.alpha = self.descriptionBackgroundView.alpha > 0 ? 0 : 1
         }
     }
+
+    func presentActivityViewController() {
+        if let image = imageView.image {
+            let activityViewController = UIActivityViewController(activityItems: [image], applicationActivities: [])
+
+            present(activityViewController, animated: true)
+        } else if let asset = playerView.player?.currentItem?.asset as? AVURLAsset {
+            asset.exportWithoutAudioTrack { result in
+                DispatchQueue.main.async {
+                    switch result {
+                    case let .success(url):
+                        let activityViewController = UIActivityViewController(
+                            activityItems: [url],
+                            applicationActivities: [])
+
+                        activityViewController.completionWithItemsHandler = { _, _, _, _ in
+                            try? FileManager.default.removeItem(at: url.deletingLastPathComponent())
+                        }
+
+                        self.present(activityViewController, animated: true)
+                    case .failure:
+                        let alertController = UIAlertController(
+                            title: nil,
+                            message: NSLocalizedString("attachment.unable-to-export-media", comment: ""),
+                            preferredStyle: .alert)
+
+                        let okAction = UIAlertAction(
+                            title: NSLocalizedString("ok", comment: ""),
+                            style: .default) { _ in }
+
+                        alertController.addAction(okAction)
+
+                        self.present(alertController, animated: true)
+                    }
+                }
+            }
+        }
+    }
 }
 
 extension ImageViewController: UIScrollViewDelegate {