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mastodon-app-ufficiale-ipho.../MastodonSDK/Sources/MastodonUI/View/Content/StatusView+ViewModel.swift

749 lines
27 KiB
Swift

//
// StatusView+ViewModel.swift
//
//
// Created by MainasuK on 2022-1-10.
//
import os.log
import UIKit
import Combine
import CoreData
import CoreDataStack
import Meta
import MastodonAsset
import MastodonCore
import MastodonCommon
import MastodonExtension
import MastodonLocalization
import MastodonSDK
extension StatusView {
public final class ViewModel: ObservableObject {
var disposeBag = Set<AnyCancellable>()
var observations = Set<NSKeyValueObservation>()
public var objects = Set<NSManagedObject>()
let logger = Logger(subsystem: "StatusView", category: "ViewModel")
public var authContext: AuthContext?
// Header
@Published public var header: Header = .none
// Author
@Published public var authorAvatarImage: UIImage?
@Published public var authorAvatarImageURL: URL?
@Published public var authorName: MetaContent?
@Published public var authorUsername: String?
@Published public var locked = false
@Published public var isMyself = false
@Published public var isMuting = false
@Published public var isBlocking = false
@Published public var timestamp: Date?
public var timestampFormatter: ((_ date: Date) -> String)?
@Published public var timestampText = ""
// Spoiler
@Published public var spoilerContent: MetaContent?
// Status
@Published public var content: MetaContent?
@Published public var language: String?
// Media
@Published public var mediaViewConfigurations: [MediaView.Configuration] = []
// Audio
@Published public var audioConfigurations: [MediaView.Configuration] = []
// Poll
@Published public var pollItems: [PollItem] = []
@Published public var isVotable: Bool = false
@Published public var isVoting: Bool = false
@Published public var isVoteButtonEnabled: Bool = false
@Published public var voterCount: Int?
@Published public var voteCount = 0
@Published public var expireAt: Date?
@Published public var expired: Bool = false
// Visibility
@Published public var visibility: MastodonVisibility = .public
// Sensitive
@Published public var isContentSensitive: Bool = false
@Published public var isMediaSensitive: Bool = false
@Published public var isSensitiveToggled = false
@Published public var isContentReveal: Bool = true
@Published public var isMediaReveal: Bool = true
// Toolbar
@Published public var isReblog: Bool = false
@Published public var isReblogEnabled: Bool = true
@Published public var isFavorite: Bool = false
@Published public var isBookmark: Bool = false
@Published public var replyCount: Int = 0
@Published public var reblogCount: Int = 0
@Published public var favoriteCount: Int = 0
// Filter
@Published public var activeFilters: [Mastodon.Entity.Filter] = []
@Published public var filterContext: Mastodon.Entity.Filter.Context?
@Published public var isFiltered = false
@Published public var groupedAccessibilityLabel = ""
let timestampUpdatePublisher = Timer.publish(every: 1.0, on: .main, in: .common)
.autoconnect()
.share()
.eraseToAnyPublisher()
public enum Header {
case none
case reply(info: ReplyInfo)
case repost(info: RepostInfo)
// case notification(info: NotificationHeaderInfo)
public class ReplyInfo {
public let header: MetaContent
public init(header: MetaContent) {
self.header = header
}
}
public struct RepostInfo {
public let header: MetaContent
public init(header: MetaContent) {
self.header = header
}
}
}
public func prepareForReuse() {
authContext = nil
authorAvatarImageURL = nil
isContentSensitive = false
isMediaSensitive = false
isSensitiveToggled = false
activeFilters = []
filterContext = nil
}
init() {
// isReblogEnabled
Publishers.CombineLatest(
$visibility,
$isMyself
)
.map { visibility, isMyself in
if isMyself {
return true
}
switch visibility {
case .public, .unlisted:
return true
case .private, .direct, ._other:
return false
}
}
.assign(to: &$isReblogEnabled)
// isContentSensitive
$spoilerContent
.map { $0 != nil }
.assign(to: &$isContentSensitive)
// isReveal
Publishers.CombineLatest3(
$isContentSensitive,
$isMediaSensitive,
$isSensitiveToggled
)
.sink { [weak self] isContentSensitive, isMediaSensitive, isSensitiveToggled in
guard let self = self else { return }
self.isContentReveal = isContentSensitive ? isSensitiveToggled : true
self.isMediaReveal = isMediaSensitive ? isSensitiveToggled : true
}
.store(in: &disposeBag)
}
}
}
extension StatusView.ViewModel {
func bind(statusView: StatusView) {
bindHeader(statusView: statusView)
bindAuthor(statusView: statusView)
bindContent(statusView: statusView)
bindMedia(statusView: statusView)
bindPoll(statusView: statusView)
bindToolbar(statusView: statusView)
bindMetric(statusView: statusView)
bindMenu(statusView: statusView)
bindFilter(statusView: statusView)
bindAccessibility(statusView: statusView)
}
private func bindHeader(statusView: StatusView) {
$header
.sink { header in
switch header {
case .none:
return
case .repost(let info):
statusView.headerIconImageView.image = Asset.Arrow.repeatSmall.image.withRenderingMode(.alwaysTemplate)
statusView.headerInfoLabel.configure(content: info.header)
statusView.setHeaderDisplay()
case .reply(let info):
statusView.headerIconImageView.image = UIImage(systemName: "arrowshape.turn.up.left.fill")
statusView.headerInfoLabel.configure(content: info.header)
statusView.setHeaderDisplay()
}
}
.store(in: &disposeBag)
}
private func bindAuthor(statusView: StatusView) {
let authorView = statusView.authorView
// avatar
Publishers.CombineLatest(
$authorAvatarImage.removeDuplicates(),
$authorAvatarImageURL.removeDuplicates()
)
.sink { image, url in
let configuration: AvatarImageView.Configuration = {
if let image = image {
return AvatarImageView.Configuration(image: image)
} else {
return AvatarImageView.Configuration(url: url)
}
}()
authorView.avatarButton.avatarImageView.configure(configuration: configuration)
authorView.avatarButton.avatarImageView.configure(cornerConfiguration: .init(corner: .fixed(radius: 12)))
}
.store(in: &disposeBag)
// name
$authorName
.sink { metaContent in
let metaContent = metaContent ?? PlaintextMetaContent(string: " ")
authorView.authorNameLabel.configure(content: metaContent)
}
.store(in: &disposeBag)
// username
let usernamePublisher = $authorUsername
.map { text -> String in
guard let text = text else { return "" }
return "@\(text)"
}
usernamePublisher
.sink { username in
let metaContent = PlaintextMetaContent(string: username)
authorView.authorUsernameLabel.configure(content: metaContent)
}
.store(in: &disposeBag)
// timestamp
Publishers.CombineLatest(
$timestamp,
timestampUpdatePublisher.prepend(Date()).eraseToAnyPublisher()
)
.compactMap { [weak self] timestamp, _ -> String? in
guard let self = self else { return nil }
guard let timestamp = timestamp,
let text = self.timestampFormatter?(timestamp)
else { return "" }
return text
}
.removeDuplicates()
.assign(to: &$timestampText)
$timestampText
.sink { [weak self] text in
guard let _ = self else { return }
authorView.dateLabel.configure(content: PlaintextMetaContent(string: text))
}
.store(in: &disposeBag)
// accessibility label
Publishers.CombineLatest4($authorName, usernamePublisher, $timestampText, $timestamp)
.map { name, username, timestampText, timestamp in
let formatter = DateFormatter()
formatter.dateStyle = .medium
formatter.timeStyle = .short
let longTimestamp = timestamp.map { formatter.string(from: $0) } ?? ""
return "\(name?.string ?? "") \(username), \(timestampText). \(longTimestamp)"
}
.assign(to: \.accessibilityLabel, on: authorView)
.store(in: &disposeBag)
}
private func bindContent(statusView: StatusView) {
Publishers.CombineLatest4(
$spoilerContent,
$content,
$language,
$isContentReveal.removeDuplicates()
)
.sink { spoilerContent, content, language, isContentReveal in
if let spoilerContent = spoilerContent {
statusView.spoilerOverlayView.spoilerMetaLabel.configure(content: spoilerContent)
// statusView.spoilerBannerView.label.configure(content: spoilerContent)
// statusView.setSpoilerBannerViewHidden(isHidden: !isContentReveal)
} else {
statusView.spoilerOverlayView.spoilerMetaLabel.reset()
// statusView.spoilerBannerView.label.reset()
}
let paragraphStyle = statusView.contentMetaText.paragraphStyle
if let language = language {
let direction = Locale.characterDirection(forLanguage: language)
paragraphStyle.alignment = direction == .rightToLeft ? .right : .left
} else {
paragraphStyle.alignment = .natural
}
statusView.contentMetaText.paragraphStyle = paragraphStyle
if let content = content {
statusView.contentMetaText.configure(
content: content
)
statusView.contentMetaText.textView.accessibilityTraits = [.staticText]
statusView.contentMetaText.textView.accessibilityElementsHidden = false
} else {
statusView.contentMetaText.reset()
statusView.contentMetaText.textView.accessibilityLabel = ""
}
statusView.contentMetaText.textView.alpha = isContentReveal ? 1 : 0 // keep the frame size and only display when revealing
statusView.setSpoilerOverlayViewHidden(isHidden: isContentReveal)
self.logger.log(level: .debug, "\((#file as NSString).lastPathComponent, privacy: .public)[\(#line, privacy: .public)], \(#function, privacy: .public): isContentReveal: \(isContentReveal)")
}
.store(in: &disposeBag)
$isMediaSensitive
.sink { isSensitive in
guard isSensitive else { return }
statusView.setContentSensitiveeToggleButtonDisplay()
}
.store(in: &disposeBag)
$isSensitiveToggled
.sink { isSensitiveToggled in
// The button indicator go-to state for button action direction
// eye: when media is hidden
// eye-slash: when media display
let image = isSensitiveToggled ? UIImage(systemName: "eye.slash.fill") : UIImage(systemName: "eye.fill")
statusView.authorView.contentSensitiveeToggleButton.setImage(image, for: .normal)
}
.store(in: &disposeBag)
}
private func bindMedia(statusView: StatusView) {
$mediaViewConfigurations
.sink { [weak self] configurations in
guard let self = self else { return }
self.logger.log(level: .debug, "\((#file as NSString).lastPathComponent, privacy: .public)[\(#line, privacy: .public)], \(#function, privacy: .public): configure media")
statusView.mediaGridContainerView.prepareForReuse()
let maxSize = CGSize(
width: statusView.contentMaxLayoutWidth,
height: 9999 // fulfill the width
)
var needsDisplay = true
switch configurations.count {
case 0:
needsDisplay = false
case 1:
let configuration = configurations[0]
let adaptiveLayout = MediaGridContainerView.AdaptiveLayout(
aspectRatio: configuration.aspectRadio,
maxSize: maxSize
)
let mediaView = statusView.mediaGridContainerView.dequeueMediaView(adaptiveLayout: adaptiveLayout)
mediaView.setup(configuration: configuration)
default:
let gridLayout = MediaGridContainerView.GridLayout(
count: configurations.count,
maxSize: maxSize
)
let mediaViews = statusView.mediaGridContainerView.dequeueMediaView(gridLayout: gridLayout)
for (i, (configuration, mediaView)) in zip(configurations, mediaViews).enumerated() {
guard i < MediaGridContainerView.maxCount else { break }
mediaView.setup(configuration: configuration)
}
}
if needsDisplay {
statusView.setMediaDisplay()
}
}
.store(in: &disposeBag)
Publishers.CombineLatest(
$mediaViewConfigurations,
$isMediaReveal
)
.sink { configurations, isMediaReveal in
for configuration in configurations {
configuration.isReveal = isMediaReveal
}
}
.store(in: &disposeBag)
$isMediaReveal
.sink { isMediaReveal in
statusView.mediaGridContainerView.contentWarningOverlay.isHidden = isMediaReveal
statusView.mediaGridContainerView.viewModel.isSensitiveToggleButtonDisplay = isMediaReveal
}
.store(in: &disposeBag)
}
private func bindPoll(statusView: StatusView) {
$pollItems
.sink { items in
guard !items.isEmpty else { return }
var snapshot = NSDiffableDataSourceSnapshot<PollSection, PollItem>()
snapshot.appendSections([.main])
snapshot.appendItems(items, toSection: .main)
if #available(iOS 15.0, *) {
statusView.pollTableViewDiffableDataSource?.applySnapshotUsingReloadData(snapshot)
} else {
// Fallback on earlier versions
statusView.pollTableViewDiffableDataSource?.apply(snapshot, animatingDifferences: false)
}
statusView.pollTableViewHeightLayoutConstraint.constant = CGFloat(items.count) * PollOptionTableViewCell.height
statusView.setPollDisplay()
}
.store(in: &disposeBag)
$isVotable
.sink { isVotable in
statusView.pollTableView.allowsSelection = isVotable
}
.store(in: &disposeBag)
// poll
let pollVoteDescription = Publishers.CombineLatest(
$voterCount,
$voteCount
)
.map { voterCount, voteCount -> String in
var description = ""
if let voterCount = voterCount {
description += L10n.Plural.Count.voter(voterCount)
} else {
description += L10n.Plural.Count.vote(voteCount)
}
return description
}
let pollCountdownDescription = Publishers.CombineLatest3(
$expireAt,
$expired,
timestampUpdatePublisher.prepend(Date()).eraseToAnyPublisher()
)
.map { expireAt, expired, _ -> String? in
guard !expired else {
return L10n.Common.Controls.Status.Poll.closed
}
guard let expireAt = expireAt else {
return nil
}
let timeLeft = expireAt.localizedTimeLeft()
return timeLeft
}
Publishers.CombineLatest(
pollVoteDescription,
pollCountdownDescription
)
.sink { pollVoteDescription, pollCountdownDescription in
statusView.pollVoteCountLabel.text = pollVoteDescription ?? "-"
statusView.pollCountdownLabel.text = pollCountdownDescription ?? "-"
}
.store(in: &disposeBag)
Publishers.CombineLatest(
$isVotable,
$isVoting
)
.sink { isVotable, isVoting in
guard isVotable else {
statusView.pollVoteButton.isHidden = true
statusView.pollVoteActivityIndicatorView.isHidden = true
return
}
statusView.pollVoteButton.isHidden = isVoting
statusView.pollVoteActivityIndicatorView.isHidden = !isVoting
statusView.pollVoteActivityIndicatorView.startAnimating()
}
.store(in: &disposeBag)
$isVoteButtonEnabled
.assign(to: \.isEnabled, on: statusView.pollVoteButton)
.store(in: &disposeBag)
}
private func bindToolbar(statusView: StatusView) {
$replyCount
.sink { count in
statusView.actionToolbarContainer.configureReply(
count: count,
isEnabled: true
)
}
.store(in: &disposeBag)
Publishers.CombineLatest3(
$reblogCount,
$isReblog,
$isReblogEnabled
)
.sink { count, isHighlighted, isEnabled in
statusView.actionToolbarContainer.configureReblog(
count: count,
isEnabled: isEnabled,
isHighlighted: isHighlighted
)
}
.store(in: &disposeBag)
Publishers.CombineLatest(
$favoriteCount,
$isFavorite
)
.sink { count, isHighlighted in
statusView.actionToolbarContainer.configureFavorite(
count: count,
isEnabled: true,
isHighlighted: isHighlighted
)
}
.store(in: &disposeBag)
}
private func bindMetric(statusView: StatusView) {
let reblogButtonTitle = $reblogCount.map { count in
L10n.Plural.Count.reblog(count)
}.share()
let favoriteButtonTitle = $favoriteCount.map { count in
L10n.Plural.Count.favorite(count)
}.share()
let metricButtonTitleLength = Publishers.CombineLatest(
reblogButtonTitle,
favoriteButtonTitle
).map { $0.count + $1.count }
Publishers.CombineLatest(
$timestamp,
metricButtonTitleLength
)
.sink { timestamp, metricButtonTitleLength in
let text: String = {
guard let timestamp = timestamp else { return " " }
let formatter = DateFormatter()
// make adaptive UI
if UIView.isZoomedMode || metricButtonTitleLength > 20 {
formatter.dateStyle = .short
formatter.timeStyle = .short
} else {
formatter.dateStyle = .medium
formatter.timeStyle = .short
}
return formatter.string(from: timestamp)
}()
statusView.statusMetricView.dateLabel.text = text
}
.store(in: &disposeBag)
reblogButtonTitle
.sink { title in
statusView.statusMetricView.reblogButton.setTitle(title, for: .normal)
}
.store(in: &disposeBag)
favoriteButtonTitle
.sink { title in
statusView.statusMetricView.favoriteButton.setTitle(title, for: .normal)
}
.store(in: &disposeBag)
}
private func bindMenu(statusView: StatusView) {
let authorView = statusView.authorView
let publisherOne = Publishers.CombineLatest(
$authorName,
$isMyself
)
let publishersTwo = Publishers.CombineLatest3(
$isMuting,
$isBlocking,
$isBookmark
)
Publishers.CombineLatest(
publisherOne.eraseToAnyPublisher(),
publishersTwo.eraseToAnyPublisher()
).eraseToAnyPublisher()
.sink { tupleOne, tupleTwo in
let (authorName, isMyself) = tupleOne
let (isMuting, isBlocking, isBookmark) = tupleTwo
guard let name = authorName?.string else {
statusView.authorView.menuButton.menu = nil
return
}
let menuContext = StatusAuthorView.AuthorMenuContext(
name: name,
isMuting: isMuting,
isBlocking: isBlocking,
isMyself: isMyself,
isBookmarking: isBookmark
)
let (menu, actions) = authorView.setupAuthorMenu(menuContext: menuContext)
authorView.menuButton.menu = menu
authorView.authorActions = actions
authorView.menuButton.showsMenuAsPrimaryAction = true
}
.store(in: &disposeBag)
}
private func bindFilter(statusView: StatusView) {
$isFiltered
.sink { isFiltered in
statusView.containerStackView.isHidden = isFiltered
if isFiltered {
statusView.setFilterHintLabelDisplay()
}
}
.store(in: &disposeBag)
}
private func bindAccessibility(statusView: StatusView) {
let authorAccessibilityLabel = Publishers.CombineLatest3(
$header,
$authorName,
$timestampText
)
.map { header, authorName, timestamp -> String? in
var strings: [String?] = []
switch header {
case .none:
break
case .reply(let info):
strings.append(info.header.string)
case .repost(let info):
strings.append(info.header.string)
}
strings.append(authorName?.string)
strings.append(timestamp)
return strings.compactMap { $0 }.joined(separator: ", ")
}
let contentAccessibilityLabel = Publishers.CombineLatest3(
$isContentReveal,
$spoilerContent,
$content
)
.map { isContentReveal, spoilerContent, content -> String? in
var strings: [String?] = []
if let spoilerContent = spoilerContent, !spoilerContent.string.isEmpty {
strings.append(L10n.Common.Controls.Status.contentWarning)
strings.append(spoilerContent.string)
// TODO: replace with "Tap to reveal"
strings.append(L10n.Common.Controls.Status.mediaContentWarning)
}
if isContentReveal {
strings.append(content?.string)
}
return strings.compactMap { $0 }.joined(separator: ", ")
}
$isContentReveal
.map { isContentReveal in
isContentReveal ? L10n.Scene.Compose.Accessibility.enableContentWarning : L10n.Scene.Compose.Accessibility.disableContentWarning
}
.sink { label in
statusView.authorView.contentSensitiveeToggleButton.accessibilityLabel = label
}
.store(in: &disposeBag)
contentAccessibilityLabel
.sink { contentAccessibilityLabel in
statusView.spoilerOverlayView.accessibilityLabel = contentAccessibilityLabel
}
.store(in: &disposeBag)
let meidaAccessibilityLabel = $mediaViewConfigurations
.map { configurations -> String? in
let count = configurations.count
return L10n.Plural.Count.media(count)
}
// TODO: Toolbar
Publishers.CombineLatest3(
authorAccessibilityLabel,
contentAccessibilityLabel,
meidaAccessibilityLabel
)
.map { author, content, media in
let group = [
author,
content,
media
]
return group
.compactMap { $0 }
.joined(separator: ", ")
}
.assign(to: &$groupedAccessibilityLabel)
$groupedAccessibilityLabel
.sink { accessibilityLabel in
statusView.accessibilityLabel = accessibilityLabel
}
.store(in: &disposeBag)
Publishers.CombineLatest(
$content,
$isContentReveal.removeDuplicates()
)
.map { content, isRevealed in
guard isRevealed, let entities = content?.entities else { return [] }
return entities.compactMap { entity in
guard let name = entity.accessibilityCustomActionLabel else { return nil }
return UIAccessibilityCustomAction(name: name) { action in
statusView.delegate?.statusView(statusView, metaText: statusView.contentMetaText, didSelectMeta: entity.meta)
return true
}
}
}
.assign(to: \.accessibilityCustomActions, on: statusView.contentMetaText.textView)
.store(in: &disposeBag)
}
}