131 lines
6 KiB
Swift
131 lines
6 KiB
Swift
import AVFoundation
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import Combine
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import Foundation
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import Photos
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import UIKit
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final class SharingMiddleware {
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static let shared = SharingMiddleware()
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func middleware(state: AppState, action: AppAction) -> AnyPublisher<AppAction, Never> {
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switch action {
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case .sharingAction(.checkCameraAccess):
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return Future<AppAction, Never> { promise in
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let status = AVCaptureDevice.authorizationStatus(for: .video)
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switch status {
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case .authorized:
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promise(.success(.sharingAction(.setCameraAccess(true))))
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case .notDetermined:
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AVCaptureDevice.requestAccess(for: .video) { granted in
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promise(.success(.sharingAction(.setCameraAccess(granted))))
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}
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case .denied, .restricted:
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promise(.success(.sharingAction(.setCameraAccess(false))))
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@unknown default:
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promise(.success(.sharingAction(.setCameraAccess(false))))
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}
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}
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.eraseToAnyPublisher()
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case .sharingAction(.checkGalleryAccess):
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return Future<AppAction, Never> { promise in
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let status = PHPhotoLibrary.authorizationStatus()
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switch status {
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case .authorized, .limited:
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promise(.success(.sharingAction(.setGalleryAccess(true))))
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case .notDetermined:
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PHPhotoLibrary.requestAuthorization { status in
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promise(.success(.sharingAction(.setGalleryAccess(status == .authorized))))
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}
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case .denied, .restricted:
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promise(.success(.sharingAction(.setGalleryAccess(false))))
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@unknown default:
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promise(.success(.sharingAction(.setGalleryAccess(false))))
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}
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}
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.eraseToAnyPublisher()
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case .sharingAction(.fetchGallery):
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return Future<AppAction, Never> { promise in
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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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}
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}
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promise(.success(.sharingAction(.galleryFetched(items))))
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}
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.eraseToAnyPublisher()
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case .sharingAction(.galleryFetched(let items)):
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DispatchQueue.global().async {
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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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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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store.dispatch(.sharingAction(.thumbnailUpdated(data: data, id: asset.localIdentifier)))
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}
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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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store.dispatch(.sharingAction(.thumbnailUpdated(data: data, id: asset.localIdentifier)))
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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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}
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}
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}
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}
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}
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return Empty().eraseToAnyPublisher()
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case .sharingAction(.shareLocation(let lat, let lon)):
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if let chat = state.conversationsState.currentChat {
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let msg = "geo:\(lat),\(lon)"
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return Just(.conversationAction(.sendMessage(from: chat.account, to: chat.participant, body: msg)))
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.eraseToAnyPublisher()
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} else {
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return Empty().eraseToAnyPublisher()
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}
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default:
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return Empty().eraseToAnyPublisher()
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}
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}
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}
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