Kurdtvs-Live-Kurdish-TV-Kur.../Mastodon/Scene/Profile/ProfileViewModel.swift

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//
// ProfileViewModel.swift
// Mastodon
//
// Created by MainasuK Cirno on 2021-3-29.
//
import os.log
import UIKit
import Combine
import CoreDataStack
import MastodonSDK
// please override this base class
class ProfileViewModel: NSObject {
typealias UserID = String
var disposeBag = Set<AnyCancellable>()
var observations = Set<NSKeyValueObservation>()
private var mastodonUserObserver: AnyCancellable?
private var currentMastodonUserObserver: AnyCancellable?
// input
let context: AppContext
let mastodonUser: CurrentValueSubject<MastodonUser?, Never>
let currentMastodonUser = CurrentValueSubject<MastodonUser?, Never>(nil)
let viewDidAppear = PassthroughSubject<Void, Never>()
// output
let domain: CurrentValueSubject<String?, Never>
let userID: CurrentValueSubject<UserID?, Never>
let bannerImageURL: CurrentValueSubject<URL?, Never>
let avatarImageURL: CurrentValueSubject<URL?, Never>
let name: CurrentValueSubject<String?, Never>
let username: CurrentValueSubject<String?, Never>
let bioDescription: CurrentValueSubject<String?, Never>
let url: CurrentValueSubject<String?, Never>
let statusesCount: CurrentValueSubject<Int?, Never>
let followingCount: CurrentValueSubject<Int?, Never>
let followersCount: CurrentValueSubject<Int?, Never>
let fileds: CurrentValueSubject<[Mastodon.Entity.Field], Never>
let emojiDict: CurrentValueSubject<MastodonStatusContent.EmojiDict, Never>
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let protected: CurrentValueSubject<Bool?, Never>
let suspended: CurrentValueSubject<Bool, Never>
let isEditing = CurrentValueSubject<Bool, Never>(false)
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let isUpdating = CurrentValueSubject<Bool, Never>(false)
let relationshipActionOptionSet = CurrentValueSubject<RelationshipActionOptionSet, Never>(.none)
let isFollowedBy = CurrentValueSubject<Bool, Never>(false)
let isMuting = CurrentValueSubject<Bool, Never>(false)
let isBlocking = CurrentValueSubject<Bool, Never>(false)
let isBlockedBy = CurrentValueSubject<Bool, Never>(false)
let isRelationshipActionButtonHidden = CurrentValueSubject<Bool, Never>(true)
let isReplyBarButtonItemHidden = CurrentValueSubject<Bool, Never>(true)
let isMoreMenuBarButtonItemHidden = CurrentValueSubject<Bool, Never>(true)
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let isMeBarButtonItemsHidden = CurrentValueSubject<Bool, Never>(true)
let needsPagePinToTop = CurrentValueSubject<Bool, Never>(false)
let needsPaingEnabled = CurrentValueSubject<Bool, Never>(true)
let needsImageOverlayBlurred = CurrentValueSubject<Bool, Never>(false)
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init(context: AppContext, optionalMastodonUser mastodonUser: MastodonUser?) {
self.context = context
self.mastodonUser = CurrentValueSubject(mastodonUser)
self.domain = CurrentValueSubject(context.authenticationService.activeMastodonAuthenticationBox.value?.domain)
self.userID = CurrentValueSubject(mastodonUser?.id)
self.bannerImageURL = CurrentValueSubject(mastodonUser?.headerImageURL())
self.avatarImageURL = CurrentValueSubject(mastodonUser?.avatarImageURL())
self.name = CurrentValueSubject(mastodonUser?.displayNameWithFallback)
self.username = CurrentValueSubject(mastodonUser?.acctWithDomain)
self.bioDescription = CurrentValueSubject(mastodonUser?.note)
self.url = CurrentValueSubject(mastodonUser?.url)
self.statusesCount = CurrentValueSubject(mastodonUser.flatMap { Int(truncating: $0.statusesCount) })
self.followingCount = CurrentValueSubject(mastodonUser.flatMap { Int(truncating: $0.followingCount) })
self.followersCount = CurrentValueSubject(mastodonUser.flatMap { Int(truncating: $0.followersCount) })
self.protected = CurrentValueSubject(mastodonUser?.locked)
self.suspended = CurrentValueSubject(mastodonUser?.suspended ?? false)
self.fileds = CurrentValueSubject(mastodonUser?.fields ?? [])
self.emojiDict = CurrentValueSubject(mastodonUser?.emojiDict ?? [:])
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super.init()
relationshipActionOptionSet
.compactMap { $0.highPriorityAction(except: []) }
.map { $0 == .none }
.assign(to: \.value, on: isRelationshipActionButtonHidden)
.store(in: &disposeBag)
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// bind active authentication
context.authenticationService.activeMastodonAuthentication
.sink { [weak self] activeMastodonAuthentication in
guard let self = self else { return }
guard let activeMastodonAuthentication = activeMastodonAuthentication else {
self.domain.value = nil
self.currentMastodonUser.value = nil
return
}
self.domain.value = activeMastodonAuthentication.domain
self.currentMastodonUser.value = activeMastodonAuthentication.user
}
.store(in: &disposeBag)
// query relationship
let mastodonUserID = self.mastodonUser.map { $0?.id }
let pendingRetryPublisher = CurrentValueSubject<TimeInterval, Never>(1)
Publishers.CombineLatest3(
mastodonUserID.removeDuplicates().eraseToAnyPublisher(),
context.authenticationService.activeMastodonAuthenticationBox.eraseToAnyPublisher(),
pendingRetryPublisher.eraseToAnyPublisher()
)
.compactMap { mastodonUserID, activeMastodonAuthenticationBox, _ -> (String, AuthenticationService.MastodonAuthenticationBox)? in
guard let mastodonUserID = mastodonUserID, let activeMastodonAuthenticationBox = activeMastodonAuthenticationBox else { return nil }
guard mastodonUserID != activeMastodonAuthenticationBox.userID else { return nil }
return (mastodonUserID, activeMastodonAuthenticationBox)
}
.setFailureType(to: Error.self) // allow failure
.flatMap { mastodonUserID, activeMastodonAuthenticationBox -> AnyPublisher<Mastodon.Response.Content<[Mastodon.Entity.Relationship]>, Error> in
let domain = activeMastodonAuthenticationBox.domain
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: [Relationship] fetch for user %s", ((#file as NSString).lastPathComponent), #line, #function, mastodonUserID)
return self.context.apiService.relationship(domain: domain, accountIDs: [mastodonUserID], authorizationBox: activeMastodonAuthenticationBox)
//.retry(3)
.eraseToAnyPublisher()
}
.sink { completion in
switch completion {
case .failure(let error):
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: [Relationship] update fail: %s", ((#file as NSString).lastPathComponent), #line, #function, error.localizedDescription)
case .finished:
break
}
} receiveValue: { response in
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: [Relationship] update success", ((#file as NSString).lastPathComponent), #line, #function)
// there are seconds delay after request follow before requested -> following. Query again when needs
guard let relationship = response.value.first else { return }
if relationship.requested == true {
let delay = pendingRetryPublisher.value
DispatchQueue.main.asyncAfter(deadline: .now() + delay) { [weak self] in
guard let _ = self else { return }
pendingRetryPublisher.value = min(2 * delay, 60)
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: [Relationship] fetch again due to pending", ((#file as NSString).lastPathComponent), #line, #function)
}
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}
}
.store(in: &disposeBag)
let isBlockingOrBlocked = Publishers.CombineLatest(
isBlocking,
isBlockedBy
)
.map { $0 || $1 }
.share()
isBlockingOrBlocked
.map { !$0 }
.assign(to: \.value, on: needsPaingEnabled)
.store(in: &disposeBag)
isBlockingOrBlocked
.map { $0 }
.assign(to: \.value, on: needsImageOverlayBlurred)
.store(in: &disposeBag)
setup()
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}
}
extension ProfileViewModel {
private func setup() {
Publishers.CombineLatest(
mastodonUser.eraseToAnyPublisher(),
currentMastodonUser.eraseToAnyPublisher()
)
.receive(on: DispatchQueue.main)
.sink { [weak self] mastodonUser, currentMastodonUser in
guard let self = self else { return }
// Update view model attribute
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self.update(mastodonUser: mastodonUser)
self.update(mastodonUser: mastodonUser, currentMastodonUser: currentMastodonUser)
// Setup observer for user
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if let mastodonUser = mastodonUser {
// setup observer
self.mastodonUserObserver = ManagedObjectObserver.observe(object: mastodonUser)
.sink { completion in
switch completion {
case .failure(let error):
assertionFailure(error.localizedDescription)
case .finished:
assertionFailure()
}
} receiveValue: { [weak self] change in
guard let self = self else { return }
guard let changeType = change.changeType else { return }
switch changeType {
case .update:
self.update(mastodonUser: mastodonUser)
self.update(mastodonUser: mastodonUser, currentMastodonUser: currentMastodonUser)
case .delete:
// TODO:
break
}
}
} else {
self.mastodonUserObserver = nil
}
// Setup observer for user
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if let currentMastodonUser = currentMastodonUser {
// setup observer
self.currentMastodonUserObserver = ManagedObjectObserver.observe(object: currentMastodonUser)
.sink { completion in
switch completion {
case .failure(let error):
assertionFailure(error.localizedDescription)
case .finished:
assertionFailure()
}
} receiveValue: { [weak self] change in
guard let self = self else { return }
guard let changeType = change.changeType else { return }
switch changeType {
case .update:
self.update(mastodonUser: mastodonUser, currentMastodonUser: currentMastodonUser)
case .delete:
// TODO:
break
}
}
} else {
self.currentMastodonUserObserver = nil
}
}
.store(in: &disposeBag)
}
private func update(mastodonUser: MastodonUser?) {
self.userID.value = mastodonUser?.id
self.bannerImageURL.value = mastodonUser?.headerImageURL()
self.avatarImageURL.value = mastodonUser?.avatarImageURL()
self.name.value = mastodonUser?.displayNameWithFallback
self.username.value = mastodonUser?.acctWithDomain
self.bioDescription.value = mastodonUser?.note
self.url.value = mastodonUser?.url
self.statusesCount.value = mastodonUser.flatMap { Int(truncating: $0.statusesCount) }
self.followingCount.value = mastodonUser.flatMap { Int(truncating: $0.followingCount) }
self.followersCount.value = mastodonUser.flatMap { Int(truncating: $0.followersCount) }
self.protected.value = mastodonUser?.locked
self.suspended.value = mastodonUser?.suspended ?? false
self.fileds.value = mastodonUser?.fields ?? []
self.emojiDict.value = mastodonUser?.emojiDict ?? [:]
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}
private func update(mastodonUser: MastodonUser?, currentMastodonUser: MastodonUser?) {
guard let mastodonUser = mastodonUser,
let currentMastodonUser = currentMastodonUser else {
// set relationship
self.relationshipActionOptionSet.value = .none
self.isFollowedBy.value = false
self.isMuting.value = false
self.isBlocking.value = false
self.isBlockedBy.value = false
// set bar button item state
self.isReplyBarButtonItemHidden.value = true
self.isMoreMenuBarButtonItemHidden.value = true
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self.isMeBarButtonItemsHidden.value = true
return
}
if mastodonUser == currentMastodonUser {
self.relationshipActionOptionSet.value = [.edit]
// set bar button item state
self.isReplyBarButtonItemHidden.value = true
self.isMoreMenuBarButtonItemHidden.value = true
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self.isMeBarButtonItemsHidden.value = false
} else {
// set with follow action default
var relationshipActionSet = RelationshipActionOptionSet([.follow])
if mastodonUser.locked {
relationshipActionSet.insert(.request)
}
if mastodonUser.suspended {
relationshipActionSet.insert(.suspended)
}
let isFollowing = mastodonUser.followingBy.flatMap { $0.contains(currentMastodonUser) } ?? false
if isFollowing {
relationshipActionSet.insert(.following)
}
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: [Relationship] update %s isFollowing: %s", ((#file as NSString).lastPathComponent), #line, #function, mastodonUser.id, isFollowing.description)
let isPending = mastodonUser.followRequestedBy.flatMap { $0.contains(currentMastodonUser) } ?? false
if isPending {
relationshipActionSet.insert(.pending)
}
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: [Relationship] update %s isPending: %s", ((#file as NSString).lastPathComponent), #line, #function, mastodonUser.id, isPending.description)
let isFollowedBy = currentMastodonUser.followingBy.flatMap { $0.contains(mastodonUser) } ?? false
self.isFollowedBy.value = isFollowedBy
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: [Relationship] update %s isFollowedBy: %s", ((#file as NSString).lastPathComponent), #line, #function, mastodonUser.id, isFollowedBy.description)
let isMuting = mastodonUser.mutingBy.flatMap { $0.contains(currentMastodonUser) } ?? false
if isMuting {
relationshipActionSet.insert(.muting)
}
self.isMuting.value = isMuting
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: [Relationship] update %s isMuting: %s", ((#file as NSString).lastPathComponent), #line, #function, mastodonUser.id, isMuting.description)
let isBlocking = mastodonUser.blockingBy.flatMap { $0.contains(currentMastodonUser) } ?? false
if isBlocking {
relationshipActionSet.insert(.blocking)
}
self.isBlocking.value = isBlocking
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: [Relationship] update %s isBlocking: %s", ((#file as NSString).lastPathComponent), #line, #function, mastodonUser.id, isBlocking.description)
let isBlockedBy = currentMastodonUser.blockingBy.flatMap { $0.contains(mastodonUser) } ?? false
if isBlockedBy {
relationshipActionSet.insert(.blocked)
}
self.isBlockedBy.value = isBlockedBy
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: [Relationship] update %s isBlockedBy: %s", ((#file as NSString).lastPathComponent), #line, #function, mastodonUser.id, isBlockedBy.description)
self.relationshipActionOptionSet.value = relationshipActionSet
// set bar button item state
self.isReplyBarButtonItemHidden.value = isBlocking || isBlockedBy
self.isMoreMenuBarButtonItemHidden.value = false
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self.isMeBarButtonItemsHidden.value = true
}
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}
}
extension ProfileViewModel {
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enum RelationshipAction: Int, CaseIterable {
case none // set hide from UI
case follow
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case request
case pending
case following
case muting
case blocked
case blocking
case suspended
case edit
case editing
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case updating
var option: RelationshipActionOptionSet {
return RelationshipActionOptionSet(rawValue: 1 << rawValue)
}
}
// construct option set on the enum for safe iterator
struct RelationshipActionOptionSet: OptionSet {
let rawValue: Int
static let none = RelationshipAction.none.option
static let follow = RelationshipAction.follow.option
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static let request = RelationshipAction.request.option
static let pending = RelationshipAction.pending.option
static let following = RelationshipAction.following.option
static let muting = RelationshipAction.muting.option
static let blocked = RelationshipAction.blocked.option
static let blocking = RelationshipAction.blocking.option
static let suspended = RelationshipAction.suspended.option
static let edit = RelationshipAction.edit.option
static let editing = RelationshipAction.editing.option
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static let updating = RelationshipAction.updating.option
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static let editOptions: RelationshipActionOptionSet = [.edit, .editing, .updating]
func highPriorityAction(except: RelationshipActionOptionSet) -> RelationshipAction? {
let set = subtracting(except)
for action in RelationshipAction.allCases.reversed() where set.contains(action.option) {
return action
}
return nil
}
var title: String {
guard let highPriorityAction = self.highPriorityAction(except: []) else {
assertionFailure()
return " "
}
switch highPriorityAction {
case .none: return " "
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case .follow: return L10n.Common.Controls.Friendship.follow
case .request: return L10n.Common.Controls.Friendship.request
case .pending: return L10n.Common.Controls.Friendship.pending
case .following: return L10n.Common.Controls.Friendship.following
case .muting: return L10n.Common.Controls.Friendship.muted
case .blocked: return L10n.Common.Controls.Friendship.follow // blocked by user
case .blocking: return L10n.Common.Controls.Friendship.blocked
case .suspended: return L10n.Common.Controls.Friendship.follow
case .edit: return L10n.Common.Controls.Friendship.editInfo
case .editing: return L10n.Common.Controls.Actions.done
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case .updating: return " "
}
}
var backgroundColor: UIColor {
guard let highPriorityAction = self.highPriorityAction(except: []) else {
assertionFailure()
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return Asset.Colors.brandBlue.color
}
switch highPriorityAction {
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case .none: return Asset.Colors.brandBlue.color
case .follow: return Asset.Colors.brandBlue.color
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case .request: return Asset.Colors.brandBlue.color
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case .pending: return Asset.Colors.brandBlue.color
case .following: return Asset.Colors.brandBlue.color
case .muting: return Asset.Colors.Background.alertYellow.color
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case .blocked: return Asset.Colors.brandBlue.color
case .blocking: return Asset.Colors.Background.danger.color
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case .suspended: return Asset.Colors.brandBlue.color
case .edit: return Asset.Colors.brandBlue.color
case .editing: return Asset.Colors.brandBlue.color
case .updating: return Asset.Colors.brandBlue.color
}
}
}
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}