wip
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@ -45,65 +45,54 @@ final class FileProcessing {
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}
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func fetchGallery() -> [SharingGalleryItem] {
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let fetchOptions = PHFetchOptions()
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fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
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let assets = PHAsset.fetchAssets(with: fetchOptions)
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var items: [SharingGalleryItem] = []
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assets.enumerateObjects { asset, _, _ in
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if asset.mediaType == .image {
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items.append(.init(id: asset.localIdentifier, type: .photo))
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} else if asset.mediaType == .video {
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items.append(.init(id: asset.localIdentifier, type: .video))
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let items = syncGalleryEnumerate()
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.map {
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SharingGalleryItem(
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id: $0.localIdentifier,
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type: $0.mediaType == .image ? .photo : .video,
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duration: $0.mediaType == .video ? $0.duration.minAndSec : nil
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)
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}
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}
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return items
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}
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func fillGalleryItemsThumbnails(items: [SharingGalleryItem]) -> [SharingGalleryItem] {
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var result: [SharingGalleryItem] = []
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let ids = items
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.filter { $0.thumbnail == nil }
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.map { $0.id }
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let assets = PHAsset.fetchAssets(withLocalIdentifiers: ids, options: nil)
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assets.enumerateObjects { asset, _, _ in
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let assets = syncGalleryEnumerate(ids)
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return assets.compactMap { asset in
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if asset.mediaType == .image {
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PHImageManager.default().requestImage(
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for: asset,
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targetSize: PHImageManagerMaximumSize,
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contentMode: .aspectFill,
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options: nil
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) { image, _ in
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image?.scaleAndCropImage(toExampleSize: CGSize(width: Const.galleryGridSize, height: Const.galleryGridSize)) { image in
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if let image {
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let data = image.jpegData(compressionQuality: 1.0) ?? Data()
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result.append(.init(id: asset.localIdentifier, type: .photo, thumbnail: data))
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}
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return syncGalleryProcessImage(asset) { [weak self] image in
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if let thumbnail = self?.scaleAndCropImage(image, CGSize(width: Const.galleryGridSize, height: Const.galleryGridSize)) {
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let data = thumbnail.jpegData(compressionQuality: 1.0) ?? Data()
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return SharingGalleryItem(id: asset.localIdentifier, type: .photo, thumbnail: data)
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} else {
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return nil
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}
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}
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} else if asset.mediaType == .video {
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PHImageManager.default().requestAVAsset(forVideo: asset, options: nil) { avAsset, _, _ in
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if let avAsset {
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let imageGenerator = AVAssetImageGenerator(asset: avAsset)
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imageGenerator.appliesPreferredTrackTransform = true
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let time = CMTimeMake(value: 1, timescale: 2)
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do {
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let imageRef = try imageGenerator.copyCGImage(at: time, actualTime: nil)
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let thumbnail = UIImage(cgImage: imageRef)
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thumbnail.scaleAndCropImage(toExampleSize: CGSize(width: Const.galleryGridSize, height: Const.galleryGridSize)) { image in
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if let image {
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let data = image.jpegData(compressionQuality: 1.0) ?? Data()
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result.append(.init(id: asset.localIdentifier, type: .video, thumbnail: data))
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}
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}
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} catch {
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print("Failed to create thumbnail image")
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}
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return syncGalleryProcessVideo(asset) { [weak self] avAsset in
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// swiftlint:disable:next force_cast
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let assetURL = avAsset as! AVURLAsset
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let url = assetURL.url
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if let thumbnail = self?.generateVideoThumbnail(url, CGSize(width: Const.galleryGridSize, height: Const.galleryGridSize)) {
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let data = thumbnail.jpegData(compressionQuality: 1.0) ?? Data()
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return SharingGalleryItem(
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id: asset.localIdentifier,
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type: .video,
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thumbnail: data,
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duration: asset.duration.minAndSec
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)
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} else {
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return nil
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}
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}
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} else {
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return nil
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}
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}
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return result
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}
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}
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@ -129,18 +118,95 @@ private extension FileProcessing {
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return newImage
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}
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func syncEnumrate(_ ids: [String]? = nil) -> [PHAsset] {
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func syncGalleryEnumerate(_ ids: [String]? = nil) -> [PHAsset] {
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var result: [PHAsset] = []
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let fetchOptions = PHFetchOptions()
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fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
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if let ids {
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fetchOptions.predicate = NSPredicate(format: "localIdentifier IN %@", ids)
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}
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let assets = PHAsset.fetchAssets(with: fetchOptions)
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assets.enumerateObjects { asset, _, _ in
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result.append(asset)
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let group = DispatchGroup()
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DispatchQueue.global(qos: .userInitiated).sync {
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let fetchOptions = PHFetchOptions()
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fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
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if let ids {
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fetchOptions.predicate = NSPredicate(format: "localIdentifier IN %@", ids)
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}
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let assets = PHAsset.fetchAssets(with: fetchOptions)
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assets.enumerateObjects { asset, _, _ in
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group.enter()
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result.append(asset)
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group.leave()
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}
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}
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group.wait()
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return result
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}
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func syncGalleryProcess<T>(_ assets: [PHAsset], _ block: @escaping (PHAsset) -> T) -> [T] {
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var result: [T] = []
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let group = DispatchGroup()
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DispatchQueue.global(qos: .userInitiated).sync {
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for asset in assets {
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group.enter()
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let res = block(asset)
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result.append(res)
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group.leave()
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}
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}
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group.wait()
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return result
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}
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func syncGalleryProcessImage<T>(_ asset: PHAsset, _ block: @escaping (UIImage) -> T?) -> T? {
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var result: T?
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let semaphore = DispatchSemaphore(value: 0)
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DispatchQueue.global(qos: .userInitiated).sync {
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let options = PHImageRequestOptions()
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options.version = .original
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options.isSynchronous = true
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PHImageManager.default().requestImage(
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for: asset,
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targetSize: PHImageManagerMaximumSize,
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contentMode: .aspectFill,
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options: options
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) { image, _ in
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if let image {
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result = block(image)
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} else {
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result = nil
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}
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semaphore.signal()
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}
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}
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semaphore.wait()
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return result
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}
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func syncGalleryProcessVideo<T>(_ asset: PHAsset, _ block: @escaping (AVAsset) -> T?) -> T? {
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var result: T?
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let semaphore = DispatchSemaphore(value: 0)
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_ = DispatchQueue.global(qos: .userInitiated).sync {
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PHImageManager.default().requestAVAsset(forVideo: asset, options: nil) { avAsset, _, _ in
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if let avAsset {
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result = block(avAsset)
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} else {
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result = nil
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}
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semaphore.signal()
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}
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}
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semaphore.wait()
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return result
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}
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func generateVideoThumbnail(_ url: URL, _ size: CGSize) -> UIImage? {
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let asset = AVAsset(url: url)
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let assetImgGenerate = AVAssetImageGenerator(asset: asset)
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assetImgGenerate.appliesPreferredTrackTransform = true
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let time = CMTimeMakeWithSeconds(Float64(1), preferredTimescale: 600)
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do {
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let cgImage = try assetImgGenerate.copyCGImage(at: time, actualTime: nil)
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let image = UIImage(cgImage: cgImage)
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return scaleAndCropImage(image, size)
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} catch {
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return nil
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}
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}
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}
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