2020-09-18 00:16:41 +00:00
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// 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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2020-10-01 02:35:06 +00:00
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final public class ProfileViewModel {
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2020-09-26 07:13:50 +00:00
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@Published public private(set) var accountViewModel: AccountViewModel?
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2020-09-27 02:03:53 +00:00
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@Published public var collection = ProfileCollection.statuses
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2020-10-01 02:35:06 +00:00
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@Published public var alertItem: AlertItem?
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2020-09-27 02:03:53 +00:00
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private let profileService: ProfileService
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2020-10-05 20:06:50 +00:00
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private let collectionViewModel: CurrentValueSubject<CollectionItemsViewModel, Never>
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2020-09-18 00:16:41 +00:00
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private var cancellables = Set<AnyCancellable>()
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2020-09-27 02:03:53 +00:00
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init(profileService: ProfileService) {
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self.profileService = profileService
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2020-09-18 00:16:41 +00:00
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2020-10-01 02:35:06 +00:00
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collectionViewModel = CurrentValueSubject(
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2020-10-05 20:06:50 +00:00
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CollectionItemsViewModel(collectionService: profileService.timelineService(profileCollection: .statuses)))
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2020-09-22 06:53:11 +00:00
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2020-10-01 02:35:06 +00:00
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profileService.accountServicePublisher
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2020-09-26 07:13:50 +00:00
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.map(AccountViewModel.init(accountService:))
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2020-09-22 06:53:11 +00:00
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.assignErrorsToAlertItem(to: \.alertItem, on: self)
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2020-09-26 07:13:50 +00:00
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.assign(to: &$accountViewModel)
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2020-10-01 02:35:06 +00:00
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$collection.dropFirst()
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2020-10-05 07:04:15 +00:00
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.map(profileService.timelineService(profileCollection:))
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2020-10-05 20:06:50 +00:00
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.map(CollectionItemsViewModel.init(collectionService:))
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2020-10-01 02:35:06 +00:00
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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.$alertItem)
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}
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.store(in: &cancellables)
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2020-09-18 00:16:41 +00:00
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}
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2020-10-01 02:35:06 +00:00
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}
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2020-09-18 00:16:41 +00:00
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2020-10-01 02:35:06 +00:00
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extension ProfileViewModel: CollectionViewModel {
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2020-10-05 06:36:22 +00:00
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public var sections: AnyPublisher<[[CollectionItemIdentifier]], Never> {
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collectionViewModel.flatMap(\.sections).eraseToAnyPublisher()
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2020-10-01 02:35:06 +00:00
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}
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2020-10-05 20:21:06 +00:00
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public var title: AnyPublisher<String, Never> {
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$accountViewModel.compactMap { $0?.accountName }.eraseToAnyPublisher()
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2020-10-01 02:35:06 +00:00
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}
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public var alertItems: AnyPublisher<AlertItem, Never> {
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collectionViewModel.flatMap(\.alertItems).eraseToAnyPublisher()
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}
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public var loading: AnyPublisher<Bool, Never> {
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collectionViewModel.flatMap(\.loading).eraseToAnyPublisher()
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2020-09-27 01:23:56 +00:00
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}
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public var navigationEvents: AnyPublisher<NavigationEvent, Never> {
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2020-09-26 07:45:39 +00:00
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$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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2020-10-01 02:35:06 +00:00
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.merge(with: collectionViewModel.flatMap(\.navigationEvents))
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.eraseToAnyPublisher()
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}
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2020-10-01 02:35:06 +00:00
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public var nextPageMaxID: String? {
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collectionViewModel.value.nextPageMaxID
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}
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2020-10-02 03:19:14 +00:00
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public var maintainScrollPositionOfItem: CollectionItemIdentifier? {
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2020-10-01 02:35:06 +00:00
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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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2020-09-18 00:16:41 +00:00
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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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2020-10-01 02:35:06 +00:00
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collectionViewModel.value.request(maxID: maxID, minID: minID)
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2020-09-18 00:16:41 +00:00
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}
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2020-10-05 07:50:59 +00:00
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public func select(indexPath: IndexPath) {
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collectionViewModel.value.select(indexPath: indexPath)
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2020-10-01 02:35:06 +00:00
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}
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2020-10-05 07:50:59 +00:00
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public func canSelect(indexPath: IndexPath) -> Bool {
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collectionViewModel.value.canSelect(indexPath: indexPath)
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2020-10-01 02:35:06 +00:00
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}
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2020-10-05 07:50:59 +00:00
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public func viewModel(indexPath: IndexPath) -> CollectionItemViewModel {
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collectionViewModel.value.viewModel(indexPath: indexPath)
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2020-09-23 01:43:06 +00:00
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}
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2020-09-18 00:16:41 +00:00
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}
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