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99 lines
3.4 KiB
Swift
99 lines
3.4 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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private let profileService: ProfileService
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private let collectionViewModel: CurrentValueSubject<StatusListViewModel, Never>
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private var cancellables = Set<AnyCancellable>()
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init(profileService: ProfileService) {
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self.profileService = profileService
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collectionViewModel = CurrentValueSubject(
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StatusListViewModel(statusListService: profileService.statusListService(profileCollection: .statuses)))
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profileService.accountServicePublisher
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.map(AccountViewModel.init(accountService:))
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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.statusListService(profileCollection:))
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.map(StatusListViewModel.init(statusListService:))
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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.$alertItem)
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}
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.store(in: &cancellables)
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}
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}
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extension ProfileViewModel: CollectionViewModel {
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public var collectionItems: AnyPublisher<[[CollectionItemIdentifier]], Never> {
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collectionViewModel.flatMap(\.collectionItems).eraseToAnyPublisher()
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}
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public var title: AnyPublisher<String?, Never> {
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$accountViewModel.map { $0?.accountName }.eraseToAnyPublisher()
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}
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public var alertItems: AnyPublisher<AlertItem, Never> {
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collectionViewModel.flatMap(\.alertItems).eraseToAnyPublisher()
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}
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public var loading: AnyPublisher<Bool, Never> {
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collectionViewModel.flatMap(\.loading).eraseToAnyPublisher()
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}
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public var navigationEvents: AnyPublisher<NavigationEvent, Never> {
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$accountViewModel.compactMap { $0 }
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.flatMap(\.events)
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.flatMap { $0 }
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.map(NavigationEvent.init)
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.compactMap { $0 }
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.assignErrorsToAlertItem(to: \.alertItem, on: self)
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.merge(with: collectionViewModel.flatMap(\.navigationEvents))
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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 maintainScrollPositionOfItem: CollectionItemIdentifier? {
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collectionViewModel.value.maintainScrollPositionOfItem
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}
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public func request(maxID: String?, minID: String?) {
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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)
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}
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public func itemSelected(_ item: CollectionItemIdentifier) {
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collectionViewModel.value.itemSelected(item)
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}
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public func canSelect(item: CollectionItemIdentifier) -> Bool {
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collectionViewModel.value.canSelect(item: item)
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}
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public func viewModel(item: CollectionItemIdentifier) -> Any? {
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collectionViewModel.value.viewModel(item: item)
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}
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}
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