147 lines
5.7 KiB
Swift
147 lines
5.7 KiB
Swift
//
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// AddSavedHashtagViewController.swift
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// Tusker
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//
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// Created by Shadowfacts on 12/19/19.
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// Copyright © 2019 Shadowfacts. All rights reserved.
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//
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import UIKit
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import Pachyderm
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class AddSavedHashtagViewController: UIViewController {
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weak var mastodonController: MastodonController!
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var resultsController: SearchResultsViewController!
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var searchController: UISearchController!
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private var collectionView: UICollectionView!
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private var dataSource: UICollectionViewDiffableDataSource<Section, Item>!
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init(mastodonController: MastodonController) {
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self.mastodonController = mastodonController
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super.init(nibName: nil, bundle: nil)
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}
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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title = NSLocalizedString("Search", comment: "search screen title")
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var config = UICollectionLayoutListConfiguration(appearance: .grouped)
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config.backgroundColor = .appGroupedBackground
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config.headerMode = .supplementary
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let layout = UICollectionViewCompositionalLayout.list(using: config)
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collectionView = UICollectionView(frame: view.bounds, collectionViewLayout: layout)
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collectionView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
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collectionView.delegate = self
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collectionView.allowsFocus = true
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collectionView.backgroundColor = .appGroupedBackground
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view.addSubview(collectionView)
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let sectionHeaderCell = UICollectionView.SupplementaryRegistration<UICollectionViewListCell>(elementKind: UICollectionView.elementKindSectionHeader) { (headerView, collectionView, indexPath) in
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var config = headerView.defaultContentConfiguration()
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config.text = NSLocalizedString("Trending Hashtags", comment: "trending hashtags section title")
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headerView.contentConfiguration = config
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}
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let registration = UICollectionView.CellRegistration<TrendingHashtagCollectionViewCell, Hashtag> { cell, indexPath, hashtag in
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cell.updateUI(hashtag: hashtag)
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}
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dataSource = UICollectionViewDiffableDataSource(collectionView: collectionView) { (collectionView, indexPath, item) in
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switch item {
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case let .tag(hashtag):
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return collectionView.dequeueConfiguredReusableCell(using: registration, for: indexPath, item: hashtag)
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}
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}
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dataSource.supplementaryViewProvider = { (collectionView, elementKind, indexPath) in
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if elementKind == UICollectionView.elementKindSectionHeader {
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return collectionView.dequeueConfiguredReusableSupplementary(using: sectionHeaderCell, for: indexPath)
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} else {
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return nil
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}
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}
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resultsController = HashtagSearchResultsViewController(mastodonController: mastodonController)
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resultsController.delegate = self
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resultsController.exploreNavigationController = self.navigationController!
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searchController = UISearchController(searchResultsController: resultsController)
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searchController.obscuresBackgroundDuringPresentation = true
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searchController.hidesNavigationBarDuringPresentation = false
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searchController.searchResultsUpdater = resultsController
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searchController.searchBar.autocapitalizationType = .none
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searchController.searchBar.placeholder = NSLocalizedString("Search for hashtags to save", comment: "add saved hashtag search field placeholder")
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searchController.searchBar.delegate = resultsController
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searchController.searchBar.showsCancelButton = false
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definesPresentationContext = true
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navigationItem.searchController = searchController
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navigationItem.hidesSearchBarWhenScrolling = false
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navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(doneButtonPressed))
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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let request = Client.getTrendingHashtags(limit: 10)
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mastodonController.run(request) { (response) in
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var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
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guard case let .success(hashtags, _) = response,
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hashtags.count > 0 else {
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self.dataSource.apply(snapshot)
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return
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}
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snapshot.appendSections([.trendingTags])
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snapshot.appendItems(hashtags.map { .tag($0) })
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self.dataSource.apply(snapshot, animatingDifferences: false)
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}
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}
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private func selectHashtag(_ hashtag: Hashtag) {
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show(HashtagTimelineViewController(for: hashtag, mastodonController: mastodonController), sender: nil)
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}
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// MARK: - Interaction
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@objc func doneButtonPressed() {
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dismiss(animated: true)
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}
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}
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extension AddSavedHashtagViewController {
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enum Section {
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case trendingTags
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}
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enum Item: Hashable {
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case tag(Hashtag)
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}
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}
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extension AddSavedHashtagViewController: UICollectionViewDelegate {
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func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
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switch dataSource.itemIdentifier(for: indexPath) {
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case nil:
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return
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case let .tag(hashtag):
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selectHashtag(hashtag)
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}
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}
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}
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extension AddSavedHashtagViewController: SearchResultsViewControllerDelegate {
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func selectedSearchResult(hashtag: Hashtag) {
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selectHashtag(hashtag)
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}
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}
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