31 lines
1.1 KiB
Swift
31 lines
1.1 KiB
Swift
// Copyright © 2020 Metabolist. All rights reserved.
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import Combine
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import ServiceLayer
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public final class LoadMoreViewModel: ObservableObject, CollectionItemViewModel {
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public var direction = LoadMore.Direction.up
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@Published public private(set) var loading = false
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public let events: AnyPublisher<AnyPublisher<CollectionItemEvent, Error>, Never>
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private let loadMoreService: LoadMoreService
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private let eventsSubject = PassthroughSubject<AnyPublisher<CollectionItemEvent, Error>, Never>()
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init(loadMoreService: LoadMoreService) {
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self.loadMoreService = loadMoreService
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events = eventsSubject.eraseToAnyPublisher()
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}
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}
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extension LoadMoreViewModel {
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func loadMore() {
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eventsSubject.send(
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loadMoreService.request(direction: direction)
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.handleEvents(
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receiveSubscription: { [weak self] _ in self?.loading = true },
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receiveCompletion: { [weak self] _ in self?.loading = false })
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.map { _ in CollectionItemEvent.ignorableOutput }
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.eraseToAnyPublisher())
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}
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}
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