89 lines
2.8 KiB
Swift
89 lines
2.8 KiB
Swift
//
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// ThreadViewController+StatusProvider.swift
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// Mastodon
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//
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// Created by MainasuK Cirno on 2021-4-12.
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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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// MARK: - StatusProvider
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extension ThreadViewController: StatusProvider {
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func status() -> Future<Status?, Never> {
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return Future { promise in promise(.success(nil)) }
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}
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func status(for cell: UITableViewCell?, indexPath: IndexPath?) -> Future<Status?, Never> {
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return Future { promise in
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guard let diffableDataSource = self.viewModel.diffableDataSource else {
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assertionFailure()
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promise(.success(nil))
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return
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}
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guard let indexPath = indexPath ?? cell.flatMap({ self.tableView.indexPath(for: $0) }),
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let item = diffableDataSource.itemIdentifier(for: indexPath) else {
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promise(.success(nil))
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return
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}
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switch item {
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case .root(let statusObjectID, _),
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.reply(let statusObjectID, _),
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.leaf(let statusObjectID, _):
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let managedObjectContext = self.viewModel.context.managedObjectContext
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managedObjectContext.perform {
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let status = managedObjectContext.object(with: statusObjectID) as? Status
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promise(.success(status))
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}
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default:
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promise(.success(nil))
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}
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}
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}
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func status(for cell: UICollectionViewCell) -> Future<Status?, Never> {
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return Future { promise in promise(.success(nil)) }
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}
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var managedObjectContext: NSManagedObjectContext {
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return viewModel.context.managedObjectContext
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}
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var tableViewDiffableDataSource: UITableViewDiffableDataSource<StatusSection, Item>? {
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return viewModel.diffableDataSource
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}
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func item(for cell: UITableViewCell?, indexPath: IndexPath?) -> Item? {
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guard let diffableDataSource = self.viewModel.diffableDataSource else {
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assertionFailure()
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return nil
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}
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guard let indexPath = indexPath ?? cell.flatMap({ self.tableView.indexPath(for: $0) }),
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let item = diffableDataSource.itemIdentifier(for: indexPath) else {
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return nil
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}
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return item
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}
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func items(indexPaths: [IndexPath]) -> [Item] {
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guard let diffableDataSource = self.viewModel.diffableDataSource else {
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assertionFailure()
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return []
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}
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var items: [Item] = []
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for indexPath in indexPaths {
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guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { continue }
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items.append(item)
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}
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return items
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}
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}
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