82 lines
3.6 KiB
Swift
82 lines
3.6 KiB
Swift
// Copyright © 2020 Metabolist. All rights reserved.
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import UIKit
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import ViewModels
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final class TableViewDataSource: UITableViewDiffableDataSource<CollectionSection.Identifier, CollectionItem> {
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private let updateQueue =
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DispatchQueue(label: "com.metabolist.metatext.collection-data-source.update-queue")
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private let viewModel: CollectionViewModel
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init(tableView: UITableView, viewModel: CollectionViewModel) {
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self.viewModel = viewModel
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for cellClass in CollectionItem.cellClasses {
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tableView.register(cellClass, forCellReuseIdentifier: String(describing: cellClass))
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}
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super.init(tableView: tableView) { tableView, indexPath, item in
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let cell = tableView.dequeueReusableCell(
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withIdentifier: String(describing: item.cellClass),
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for: indexPath)
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switch (cell, viewModel.viewModel(indexPath: indexPath)) {
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case let (statusCell as StatusTableViewCell, statusViewModel as StatusViewModel):
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statusCell.viewModel = statusViewModel
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case let (accountCell as AccountTableViewCell, accountViewModel as AccountViewModel):
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accountCell.viewModel = accountViewModel
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case let (loadMoreCell as LoadMoreTableViewCell, loadMoreViewModel as LoadMoreViewModel):
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loadMoreCell.viewModel = loadMoreViewModel
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case let (notificationCell as NotificationTableViewCell, notificationViewModel as NotificationViewModel):
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notificationCell.viewModel = notificationViewModel
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case let (conversationCell as ConversationTableViewCell, conversationViewModel as ConversationViewModel):
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conversationCell.viewModel = conversationViewModel
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case let (tagCell as TagTableViewCell, tagViewModel as TagViewModel):
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tagCell.viewModel = tagViewModel
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case let (announcementCell as AnnouncementTableViewCell, announcementViewModel as AnnouncementViewModel):
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announcementCell.viewModel = announcementViewModel
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case let (_, moreResultsViewModel as MoreResultsViewModel):
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var configuration = cell.defaultContentConfiguration()
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let statusWord = viewModel.identityContext.appPreferences.statusWord
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configuration.text = moreResultsViewModel.scope.moreDescription(statusWord: statusWord)
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cell.contentConfiguration = configuration
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cell.accessoryType = .disclosureIndicator
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default:
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break
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}
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return cell
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}
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}
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override func apply(_ snapshot: NSDiffableDataSourceSnapshot<CollectionSection.Identifier, CollectionItem>,
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animatingDifferences: Bool = true,
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completion: (() -> Void)? = nil) {
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updateQueue.async {
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super.apply(snapshot, animatingDifferences: animatingDifferences, completion: completion)
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}
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}
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override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
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let currentSnapshot = snapshot()
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let section = currentSnapshot.sectionIdentifiers[section]
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if currentSnapshot.numberOfItems(inSection: section) > 0,
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let searchScope = section.searchScope {
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return searchScope.title(statusWord: viewModel.identityContext.appPreferences.statusWord)
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}
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return nil
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}
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}
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extension TableViewDataSource {
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func indexPath(itemId: CollectionItem.Id) -> IndexPath? {
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guard let item = snapshot().itemIdentifiers.first(where: { $0.itemId == itemId }) else { return nil }
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return indexPath(for: item)
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}
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}
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