mastodon-ios/Mastodon/Scene/Thread/ThreadViewController+Provid...

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