71 lines
2.4 KiB
Swift
71 lines
2.4 KiB
Swift
//
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// HashtagTimelineViewModel+Diffable.swift
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// Mastodon
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//
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// Created by BradGao on 2021/3/30.
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//
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import UIKit
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import Combine
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import CoreData
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import CoreDataStack
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extension HashtagTimelineViewModel {
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func setupDiffableDataSource(
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tableView: UITableView,
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statusTableViewCellDelegate: StatusTableViewCellDelegate
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) {
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diffableDataSource = StatusSection.diffableDataSource(
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tableView: tableView,
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context: context,
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configuration: StatusSection.Configuration(
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context: context,
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authContext: authContext,
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statusTableViewCellDelegate: statusTableViewCellDelegate,
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timelineMiddleLoaderTableViewCellDelegate: nil,
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filterContext: .none,
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activeFilters: nil
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)
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)
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stateMachine.enter(State.Reloading.self)
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var snapshot = NSDiffableDataSourceSnapshot<StatusSection, StatusItem>()
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snapshot.appendSections([.main])
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diffableDataSource?.apply(snapshot)
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fetchedResultsController.$records
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.receive(on: DispatchQueue.main)
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.sink { [weak self] records 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<StatusSection, StatusItem>()
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snapshot.appendSections([.main])
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let items = records.map { StatusItem.status(record: $0) }
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snapshot.appendItems(items, toSection: .main)
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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.Reloading,
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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: .main)
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}
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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.apply(snapshot)
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}
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.store(in: &disposeBag)
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}
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}
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