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