mirror of
https://github.com/twonlyapp/twonly-app.git
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48 lines
1.7 KiB
Swift
48 lines
1.7 KiB
Swift
import Foundation
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import Photos
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/// Writes a finished media file into the user's photo library.
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///
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/// Called directly from Rust. Rust decides whether an export should happen,
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/// embeds the EXIF metadata beforehand, and owns the resulting state; this only
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/// hands the file to Photos.
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@_cdecl("twonly_save_to_gallery")
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func twonlySaveToGallery(
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_ path: UnsafePointer<CChar>?,
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_ isVideo: Bool,
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_ createdAtMillis: Int64
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) -> Bool {
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guard let path else { return false }
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let url = URL(fileURLWithPath: String(cString: path))
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guard FileManager.default.fileExists(atPath: url.path) else { return false }
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// Authorisation is requested for adding only; a denied library never blocks
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// the send itself, the export just fails.
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let status = PHPhotoLibrary.authorizationStatus(for: .addOnly)
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if status == .notDetermined {
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let waiting = DispatchSemaphore(value: 0)
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PHPhotoLibrary.requestAuthorization(for: .addOnly) { _ in waiting.signal() }
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waiting.wait()
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}
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switch PHPhotoLibrary.authorizationStatus(for: .addOnly) {
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case .authorized, .limited: break
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default: return false
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}
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var saved = false
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let finished = DispatchSemaphore(value: 0)
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PHPhotoLibrary.shared().performChanges {
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let request: PHAssetChangeRequest? =
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isVideo
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? PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: url)
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: PHAssetChangeRequest.creationRequestForAssetFromImage(atFileURL: url)
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// Photos sorts on this, so it has to carry the capture time rather than
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// the moment the file was exported.
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request?.creationDate = Date(timeIntervalSince1970: Double(createdAtMillis) / 1000)
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} completionHandler: { success, _ in
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saved = success
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finished.signal()
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}
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finished.wait()
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return saved
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}
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