metatext-app-ios-iphone-ipad/View Models/EditFilterViewModel.swift

79 lines
2.5 KiB
Swift

// Copyright © 2020 Metabolist. All rights reserved.
import Foundation
import Combine
import Mastodon
class EditFilterViewModel: ObservableObject {
@Published var filter: Filter
@Published var saving = false
@Published var alertItem: AlertItem?
let saveCompleted: AnyPublisher<Void, Never>
var date: Date {
didSet { filter.expiresAt = date }
}
private let identityService: IdentityService
private let saveCompletedInput = PassthroughSubject<Void, Never>()
private var cancellables = Set<AnyCancellable>()
init(filter: Filter, identityService: IdentityService) {
self.filter = filter
self.identityService = identityService
date = filter.expiresAt ?? Date()
saveCompleted = saveCompletedInput.eraseToAnyPublisher()
}
}
extension EditFilterViewModel {
var isNew: Bool { filter.id == Filter.newFilterID }
var isSaveDisabled: Bool { filter.phrase == "" || filter.context.isEmpty }
func toggleSelection(context: Filter.Context) {
if filter.context.contains(context) {
filter.context.removeAll { $0 == context }
} else {
filter.context.append(context)
}
}
func save() {
(isNew ? identityService.createFilter(filter) : identityService.updateFilter(filter))
.assignErrorsToAlertItem(to: \.alertItem, on: self)
.handleEvents(
receiveSubscription: { [weak self] _ in self?.saving = true },
receiveCompletion: { [weak self] in
guard let self = self else { return }
self.saving = false
if case .finished = $0 {
self.saveCompletedInput.send(())
}
})
.sink { _ in }
.store(in: &cancellables)
}
}
extension Filter.Context {
var localized: String {
switch self {
case .home:
return NSLocalizedString("filter.context.home", comment: "")
case .notifications:
return NSLocalizedString("filter.context.notifications", comment: "")
case .public:
return NSLocalizedString("filter.context.public", comment: "")
case .thread:
return NSLocalizedString("filter.context.thread", comment: "")
case .account:
return NSLocalizedString("filter.context.account", comment: "")
case .unknown:
return NSLocalizedString("filter.context.unknown", comment: "")
}
}
}