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138 lines
4.8 KiB
Swift
138 lines
4.8 KiB
Swift
// Copyright © 2020 Metabolist. All rights reserved.
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import Combine
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import Foundation
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import Mastodon
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import ServiceLayer
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final public class ProfileViewModel {
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@Published public private(set) var accountViewModel: AccountViewModel?
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@Published public var collection = ProfileCollection.statuses
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@Published public var alertItem: AlertItem?
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public let imagePresentations: AnyPublisher<URL, Never>
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private let profileService: ProfileService
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private let collectionViewModel: CurrentValueSubject<CollectionItemsViewModel, Never>
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private let imagePresentationsSubject = PassthroughSubject<URL, Never>()
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private var cancellables = Set<AnyCancellable>()
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public init(profileService: ProfileService, identityContext: IdentityContext) {
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self.profileService = profileService
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imagePresentations = imagePresentationsSubject.eraseToAnyPublisher()
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collectionViewModel = CurrentValueSubject(
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CollectionItemsViewModel(
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collectionService: profileService.timelineService(profileCollection: .statuses),
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identityContext: identityContext))
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profileService.accountServicePublisher
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.map { AccountViewModel(accountService: $0, identityContext: identityContext) }
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.assignErrorsToAlertItem(to: \.alertItem, on: self)
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.assign(to: &$accountViewModel)
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$collection.dropFirst()
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.map(profileService.timelineService(profileCollection:))
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.map { CollectionItemsViewModel(collectionService: $0, identityContext: identityContext) }
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.sink { [weak self] in
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guard let self = self else { return }
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self.collectionViewModel.send($0)
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$0.$alertItem.assign(to: &self.$alertItem)
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}
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.store(in: &cancellables)
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}
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}
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public extension ProfileViewModel {
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func presentHeader() {
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guard let accountViewModel = accountViewModel else { return }
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imagePresentationsSubject.send(accountViewModel.headerURL)
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}
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func presentAvatar() {
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guard let accountViewModel = accountViewModel else { return }
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imagePresentationsSubject.send(accountViewModel.avatarURL(profile: true))
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}
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func fetchProfile() -> AnyPublisher<Never, Never> {
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profileService.fetchProfile().assignErrorsToAlertItem(to: \.alertItem, on: self)
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}
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}
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extension ProfileViewModel: CollectionViewModel {
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public var updates: AnyPublisher<CollectionUpdate, Never> {
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collectionViewModel.flatMap(\.updates).eraseToAnyPublisher()
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}
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public var title: AnyPublisher<String, Never> {
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$accountViewModel.compactMap { $0?.accountName }.eraseToAnyPublisher()
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}
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public var titleLocalizationComponents: AnyPublisher<[String], Never> {
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collectionViewModel.flatMap(\.titleLocalizationComponents).eraseToAnyPublisher()
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}
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public var expandAll: AnyPublisher<ExpandAllState, Never> {
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Empty().eraseToAnyPublisher()
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}
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public var alertItems: AnyPublisher<AlertItem, Never> {
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collectionViewModel.flatMap(\.alertItems).eraseToAnyPublisher()
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}
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public var loading: AnyPublisher<Bool, Never> {
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collectionViewModel.flatMap(\.loading).eraseToAnyPublisher()
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}
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public var events: AnyPublisher<CollectionItemEvent, Never> {
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$accountViewModel.compactMap { $0 }
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.flatMap(\.events)
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.flatMap { $0 }
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.assignErrorsToAlertItem(to: \.alertItem, on: self)
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.merge(with: collectionViewModel.flatMap(\.events))
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.eraseToAnyPublisher()
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}
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public var nextPageMaxId: String? {
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collectionViewModel.value.nextPageMaxId
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}
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public var canRefresh: Bool { collectionViewModel.value.canRefresh }
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public func request(maxId: String?, minId: String?, search: Search?) {
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if case .statuses = collection, maxId == nil {
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profileService.fetchPinnedStatuses()
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.assignErrorsToAlertItem(to: \.alertItem, on: self)
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.sink { _ in }
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.store(in: &cancellables)
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}
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collectionViewModel.value.request(maxId: maxId, minId: minId, search: nil)
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}
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public func requestNextPage(fromIndexPath indexPath: IndexPath) {
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collectionViewModel.value.requestNextPage(fromIndexPath: indexPath)
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}
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public func viewedAtTop(indexPath: IndexPath) {
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collectionViewModel.value.viewedAtTop(indexPath: indexPath)
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}
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public func select(indexPath: IndexPath) {
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collectionViewModel.value.select(indexPath: indexPath)
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}
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public func canSelect(indexPath: IndexPath) -> Bool {
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collectionViewModel.value.canSelect(indexPath: indexPath)
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}
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public func viewModel(indexPath: IndexPath) -> CollectionItemViewModel {
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collectionViewModel.value.viewModel(indexPath: indexPath)
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}
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public func toggleExpandAll() {
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collectionViewModel.value.toggleExpandAll()
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}
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}
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