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60 lines
1.9 KiB
Swift
60 lines
1.9 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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public final class EditFilterViewModel: ObservableObject {
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@Published public var filter: Filter
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@Published public var saving = false
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@Published public var alertItem: AlertItem?
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public let saveCompleted: AnyPublisher<Void, Never>
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public let identityContext: IdentityContext
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public var date: Date {
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didSet { filter.expiresAt = date }
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}
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private let saveCompletedSubject = PassthroughSubject<Void, Never>()
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private var cancellables = Set<AnyCancellable>()
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public init(filter: Filter, identityContext: IdentityContext) {
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self.filter = filter
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self.identityContext = identityContext
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date = filter.expiresAt ?? Date()
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saveCompleted = saveCompletedSubject.eraseToAnyPublisher()
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}
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}
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public extension EditFilterViewModel {
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var isNew: Bool { filter.id == Filter.newFilterId }
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var isSaveDisabled: Bool { filter.phrase.isEmpty || filter.context.isEmpty }
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func toggleSelection(context: Filter.Context) {
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if filter.context.contains(context) {
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filter.context.removeAll { $0 == context }
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} else {
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filter.context.append(context)
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}
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}
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func save() {
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(isNew ? identityContext.service.createFilter(filter) : identityContext.service.updateFilter(filter))
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.assignErrorsToAlertItem(to: \.alertItem, on: self)
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.handleEvents(
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receiveSubscription: { [weak self] _ in self?.saving = true },
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receiveCompletion: { [weak self] in
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guard let self = self else { return }
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self.saving = false
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if case .finished = $0 {
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self.saveCompletedSubject.send()
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}
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})
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.sink { _ in }
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.store(in: &cancellables)
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}
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}
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