93 lines
4.1 KiB
Swift
93 lines
4.1 KiB
Swift
//
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// SearchHistorySection.swift
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// Mastodon
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//
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// Created by MainasuK Cirno on 2021-7-15.
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//
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import UIKit
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import CoreDataStack
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enum SearchHistorySection: Hashable {
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case main
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}
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extension SearchHistorySection {
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struct Configuration {
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weak var searchHistorySectionHeaderCollectionReusableViewDelegate: SearchHistorySectionHeaderCollectionReusableViewDelegate?
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}
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static func diffableDataSource(
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collectionView: UICollectionView,
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context: AppContext,
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configuration: Configuration
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) -> UICollectionViewDiffableDataSource<SearchHistorySection, SearchHistoryItem> {
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let userCellRegister = UICollectionView.CellRegistration<SearchHistoryUserCollectionViewCell, ManagedObjectRecord<MastodonUser>> { cell, indexPath, item in
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context.managedObjectContext.performAndWait {
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guard let user = item.object(in: context.managedObjectContext) else { return }
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cell.configure(viewModel: .init(value: user))
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}
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}
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let hashtagCellRegister = UICollectionView.CellRegistration<UICollectionViewListCell, ManagedObjectRecord<Tag>> { cell, indexPath, item in
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context.managedObjectContext.performAndWait {
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guard let hashtag = item.object(in: context.managedObjectContext) else { return }
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var contentConfiguration = cell.defaultContentConfiguration()
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contentConfiguration.text = "#" + hashtag.name
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cell.contentConfiguration = contentConfiguration
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}
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var backgroundConfiguration = UIBackgroundConfiguration.listGroupedCell()
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backgroundConfiguration.backgroundColorTransformer = .init { [weak cell] _ in
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guard let state = cell?.configurationState else {
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return ThemeService.shared.currentTheme.value.secondarySystemGroupedBackgroundColor
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}
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if state.isHighlighted || state.isSelected {
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return ThemeService.shared.currentTheme.value.tableViewCellSelectionBackgroundColor
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}
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return ThemeService.shared.currentTheme.value.secondarySystemGroupedBackgroundColor
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}
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cell.backgroundConfiguration = backgroundConfiguration
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}
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let dataSource = UICollectionViewDiffableDataSource<SearchHistorySection, SearchHistoryItem>(collectionView: collectionView) { collectionView, indexPath, item in
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switch item {
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case .user(let record):
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return collectionView.dequeueConfiguredReusableCell(
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using: userCellRegister,
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for: indexPath, item: record)
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case .hashtag(let record):
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return collectionView.dequeueConfiguredReusableCell(
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using: hashtagCellRegister,
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for: indexPath, item: record)
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}
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}
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let trendHeaderRegister = UICollectionView.SupplementaryRegistration<SearchHistorySectionHeaderCollectionReusableView>(elementKind: UICollectionView.elementKindSectionHeader) { [weak dataSource] supplementaryView, elementKind, indexPath in
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supplementaryView.delegate = configuration.searchHistorySectionHeaderCollectionReusableViewDelegate
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guard let _ = dataSource else { return }
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// let sections = dataSource.snapshot().sectionIdentifiers
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// guard indexPath.section < sections.count else { return }
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// let section = sections[indexPath.section]
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}
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dataSource.supplementaryViewProvider = { (collectionView: UICollectionView, elementKind: String, indexPath: IndexPath) in
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let fallback = UICollectionReusableView()
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switch elementKind {
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case UICollectionView.elementKindSectionHeader:
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return collectionView.dequeueConfiguredReusableSupplementary(using: trendHeaderRegister, for: indexPath)
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default:
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assertionFailure()
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return fallback
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}
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}
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return dataSource
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} // end func
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}
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