forked from zelo72/mastodon-ios
61 lines
1.9 KiB
Swift
61 lines
1.9 KiB
Swift
//
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// DiscoveryNewsViewModel+Diffable.swift
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// Mastodon
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//
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// Created by MainasuK on 2022-4-13.
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//
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import UIKit
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import Combine
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extension DiscoveryNewsViewModel {
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func setupDiffableDataSource(
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tableView: UITableView
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) {
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diffableDataSource = DiscoverySection.diffableDataSource(
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tableView: tableView,
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context: context,
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configuration: DiscoverySection.Configuration()
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)
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stateMachine.enter(State.Reloading.self)
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$links
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.receive(on: DispatchQueue.main)
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.sink { [weak self] links in
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guard let self = self else { return }
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guard let diffableDataSource = self.diffableDataSource else { return }
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var snapshot = NSDiffableDataSourceSnapshot<DiscoverySection, DiscoveryItem>()
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snapshot.appendSections([.news])
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let items = links.map { DiscoveryItem.link($0) }
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snapshot.appendItems(items, toSection: .news)
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if let currentState = self.stateMachine.currentState {
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switch currentState {
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case is State.Initial,
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is State.Loading,
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is State.Idle,
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is State.Fail:
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if !items.isEmpty {
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snapshot.appendItems([.bottomLoader], toSection: .news)
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}
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case is State.Reloading:
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break
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case is State.NoMore:
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break
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default:
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assertionFailure()
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break
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}
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}
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diffableDataSource.applySnapshot(snapshot, animated: false)
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}
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.store(in: &disposeBag)
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}
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}
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