wip

ConversationsClassic/AppCore/Files/FileProcessing.swift

@@ -45,67 +45,56 @@ final class FileProcessing {
     }
 
     func fetchGallery() -> [SharingGalleryItem] {
-        let fetchOptions = PHFetchOptions()
+        let items = syncGalleryEnumerate()
-        fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
+            .map {
-        let assets = PHAsset.fetchAssets(with: fetchOptions)
+                SharingGalleryItem(
-        var items: [SharingGalleryItem] = []
+                    id: $0.localIdentifier,
-        assets.enumerateObjects { asset, _, _ in
+                    type: $0.mediaType == .image ? .photo : .video,
-            if asset.mediaType == .image {
+                    duration: $0.mediaType == .video ? $0.duration.minAndSec : nil
-                items.append(.init(id: asset.localIdentifier, type: .photo))
+                )
-            } else if asset.mediaType == .video {
-                items.append(.init(id: asset.localIdentifier, type: .video))
-            }
             }
         return items
     }
 
     func fillGalleryItemsThumbnails(items: [SharingGalleryItem]) -> [SharingGalleryItem] {
-        var result: [SharingGalleryItem] = []
         let ids = items
             .filter { $0.thumbnail == nil }
             .map { $0.id }
 
-        let assets = PHAsset.fetchAssets(withLocalIdentifiers: ids, options: nil)
+        let assets = syncGalleryEnumerate(ids)
-        assets.enumerateObjects { asset, _, _ in
+        return assets.compactMap { asset in
             if asset.mediaType == .image {
-                PHImageManager.default().requestImage(
+                return syncGalleryProcessImage(asset) { [weak self] image in
-                    for: asset,
+                    if let thumbnail = self?.scaleAndCropImage(image, CGSize(width: Const.galleryGridSize, height: Const.galleryGridSize)) {
-                    targetSize: PHImageManagerMaximumSize,
+                        let data = thumbnail.jpegData(compressionQuality: 1.0) ?? Data()
-                    contentMode: .aspectFill,
+                        return SharingGalleryItem(id: asset.localIdentifier, type: .photo, thumbnail: data)
-                    options: nil
+                    } else {
-                ) { image, _ in
+                        return nil
-                    image?.scaleAndCropImage(toExampleSize: CGSize(width: Const.galleryGridSize, height: Const.galleryGridSize)) { image in
-                        if let image {
-                            let data = image.jpegData(compressionQuality: 1.0) ?? Data()
-                            result.append(.init(id: asset.localIdentifier, type: .photo, thumbnail: data))
-                        }
                     }
                 }
             } else if asset.mediaType == .video {
-                PHImageManager.default().requestAVAsset(forVideo: asset, options: nil) { avAsset, _, _ in
+                return syncGalleryProcessVideo(asset) { [weak self] avAsset in
-                    if let avAsset {
+                    // swiftlint:disable:next force_cast
-                        let imageGenerator = AVAssetImageGenerator(asset: avAsset)
+                    let assetURL = avAsset as! AVURLAsset
-                        imageGenerator.appliesPreferredTrackTransform = true
+                    let url = assetURL.url
-                        let time = CMTimeMake(value: 1, timescale: 2)
+                    if let thumbnail = self?.generateVideoThumbnail(url, CGSize(width: Const.galleryGridSize, height: Const.galleryGridSize)) {
-                        do {
+                        let data = thumbnail.jpegData(compressionQuality: 1.0) ?? Data()
-                            let imageRef = try imageGenerator.copyCGImage(at: time, actualTime: nil)
+                        return SharingGalleryItem(
-                            let thumbnail = UIImage(cgImage: imageRef)
+                            id: asset.localIdentifier,
-                            thumbnail.scaleAndCropImage(toExampleSize: CGSize(width: Const.galleryGridSize, height: Const.galleryGridSize)) { image in
+                            type: .video,
-                                if let image {
+                            thumbnail: data,
-                                    let data = image.jpegData(compressionQuality: 1.0) ?? Data()
+                            duration: asset.duration.minAndSec
-                                    result.append(.init(id: asset.localIdentifier, type: .video, thumbnail: data))
+                        )
+                    } else {
+                        return nil
                     }
                 }
-                        } catch {
+            } else {
-                            print("Failed to create thumbnail image")
+                return nil
             }
         }
     }
 }
-        }
-        return result
-    }
-}
 
 private extension FileProcessing {
     func scaleAndCropImage(_ img: UIImage, _ size: CGSize) -> UIImage? {
@@ -129,9 +118,11 @@ private extension FileProcessing {
         return newImage
     }
 
-    func syncEnumrate(_ ids: [String]? = nil) -> [PHAsset] {
+    func syncGalleryEnumerate(_ ids: [String]? = nil) -> [PHAsset] {
         var result: [PHAsset] = []
 
+        let group = DispatchGroup()
+        DispatchQueue.global(qos: .userInitiated).sync {
             let fetchOptions = PHFetchOptions()
             fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
             if let ids {
@@ -139,8 +130,83 @@ private extension FileProcessing {
             }
             let assets = PHAsset.fetchAssets(with: fetchOptions)
             assets.enumerateObjects { asset, _, _ in
+                group.enter()
                 result.append(asset)
+                group.leave()
             }
+        }
+        group.wait()
         return result
     }
+
+    func syncGalleryProcess<T>(_ assets: [PHAsset], _ block: @escaping (PHAsset) -> T) -> [T] {
+        var result: [T] = []
+        let group = DispatchGroup()
+        DispatchQueue.global(qos: .userInitiated).sync {
+            for asset in assets {
+                group.enter()
+                let res = block(asset)
+                result.append(res)
+                group.leave()
+            }
+        }
+        group.wait()
+        return result
+    }
+
+    func syncGalleryProcessImage<T>(_ asset: PHAsset, _ block: @escaping (UIImage) -> T?) -> T? {
+        var result: T?
+        let semaphore = DispatchSemaphore(value: 0)
+        DispatchQueue.global(qos: .userInitiated).sync {
+            let options = PHImageRequestOptions()
+            options.version = .original
+            options.isSynchronous = true
+            PHImageManager.default().requestImage(
+                for: asset,
+                targetSize: PHImageManagerMaximumSize,
+                contentMode: .aspectFill,
+                options: options
+            ) { image, _ in
+                if let image {
+                    result = block(image)
+                } else {
+                    result = nil
+                }
+                semaphore.signal()
+            }
+        }
+        semaphore.wait()
+        return result
+    }
+
+    func syncGalleryProcessVideo<T>(_ asset: PHAsset, _ block: @escaping (AVAsset) -> T?) -> T? {
+        var result: T?
+        let semaphore = DispatchSemaphore(value: 0)
+        _ = DispatchQueue.global(qos: .userInitiated).sync {
+            PHImageManager.default().requestAVAsset(forVideo: asset, options: nil) { avAsset, _, _ in
+                if let avAsset {
+                    result = block(avAsset)
+                } else {
+                    result = nil
+                }
+                semaphore.signal()
+            }
+        }
+        semaphore.wait()
+        return result
+    }
+
+    func generateVideoThumbnail(_ url: URL, _ size: CGSize) -> UIImage? {
+        let asset = AVAsset(url: url)
+        let assetImgGenerate = AVAssetImageGenerator(asset: asset)
+        assetImgGenerate.appliesPreferredTrackTransform = true
+        let time = CMTimeMakeWithSeconds(Float64(1), preferredTimescale: 600)
+        do {
+            let cgImage = try assetImgGenerate.copyCGImage(at: time, actualTime: nil)
+            let image = UIImage(cgImage: cgImage)
+            return scaleAndCropImage(image, size)
+        } catch {
+            return nil
+        }
+    }
 }