mastodon-app-ufficiale-ipho.../MastodonSDK/Sources/MastodonUI/View/Content/MediaView+Configuration.swift

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//
// MediaView+Configuration.swift
// TwidereX
//
// Created by Cirno MainasuK on 2021-10-14.
// Copyright © 2021 Twidere. All rights reserved.
//
import UIKit
import Combine
import CoreData
import Photos
import AlamofireImage
extension MediaView {
public class Configuration: Hashable {
var disposeBag = Set<AnyCancellable>()
public let info: Info
public let blurhash: String?
@Published public var isReveal = true
@Published public var previewImage: UIImage?
@Published public var blurhashImage: UIImage?
public var blurhashImageDisposeBag = Set<AnyCancellable>()
public init(
info: MediaView.Configuration.Info,
blurhash: String?
) {
self.info = info
self.blurhash = blurhash
}
public var aspectRadio: CGSize {
switch info {
case .image(let info): return info.aspectRadio
case .gif(let info): return info.aspectRadio
case .video(let info): return info.aspectRadio
}
}
public var previewURL: String? {
switch info {
case .image(let info):
return info.assetURL
case .gif(let info):
return info.previewURL
case .video(let info):
return info.previewURL
}
}
public var assetURL: String? {
switch info {
case .image(let info):
return info.assetURL
case .gif(let info):
return info.assetURL
case .video(let info):
return info.assetURL
}
}
public var resourceType: PHAssetResourceType {
switch info {
case .image:
return .photo
case .gif:
return .video
case .video:
return .video
}
}
public static func == (lhs: MediaView.Configuration, rhs: MediaView.Configuration) -> Bool {
return lhs.info == rhs.info
&& lhs.blurhash == rhs.blurhash
&& lhs.isReveal == rhs.isReveal
}
public func hash(into hasher: inout Hasher) {
hasher.combine(info)
hasher.combine(blurhash)
}
}
}
extension MediaView.Configuration {
public enum Info: Hashable {
case image(info: ImageInfo)
case gif(info: VideoInfo)
case video(info: VideoInfo)
}
public struct ImageInfo: Hashable {
public let aspectRadio: CGSize
public let assetURL: String?
public init(
aspectRadio: CGSize,
assetURL: String?
) {
self.aspectRadio = aspectRadio
self.assetURL = assetURL
}
public func hash(into hasher: inout Hasher) {
hasher.combine(aspectRadio.width)
hasher.combine(aspectRadio.height)
assetURL.flatMap { hasher.combine($0) }
}
}
public struct VideoInfo: Hashable {
public let aspectRadio: CGSize
public let assetURL: String?
public let previewURL: String?
public let durationMS: Int?
public init(
aspectRadio: CGSize,
assetURL: String?,
previewURL: String?,
durationMS: Int?
) {
self.aspectRadio = aspectRadio
self.assetURL = assetURL
self.previewURL = previewURL
self.durationMS = durationMS
}
public func hash(into hasher: inout Hasher) {
hasher.combine(aspectRadio.width)
hasher.combine(aspectRadio.height)
assetURL.flatMap { hasher.combine($0) }
previewURL.flatMap { hasher.combine($0) }
durationMS.flatMap { hasher.combine($0) }
}
}
}
extension MediaView.Configuration {
public func load() {
if let previewURL = previewURL,
let url = URL(string: previewURL)
{
let placeholder = UIImage.placeholder(color: .systemGray6)
let request = URLRequest(url: url)
ImageDownloader.default.download(request, completion: { [weak self] response in
guard let self = self else { return }
switch response.result {
case .success(let image):
self.previewImage = image
case .failure:
self.previewImage = placeholder
}
})
}
if let assetURL = assetURL,
let blurhash = blurhash
{
BlurhashImageCacheService.shared.image(
blurhash: blurhash,
size: aspectRadio,
url: assetURL
)
.assign(to: \.blurhashImage, on: self)
.store(in: &blurhashImageDisposeBag)
}
}
}