forked from zelo72/mastodon-ios
109 lines
3.8 KiB
Swift
109 lines
3.8 KiB
Swift
//
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// PublicTimelineViewController.swift
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// Mastodon
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//
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// Created by sxiaojian on 2021/1/27.
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//
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import os.log
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import UIKit
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import AVKit
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import Combine
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import CoreDataStack
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import GameplayKit
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final class PublicTimelineViewController: UIViewController, NeedsDependency, TimelinePostTableViewCellDelegate {
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weak var context: AppContext! { willSet { precondition(!isViewLoaded) } }
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weak var coordinator: SceneCoordinator! { willSet { precondition(!isViewLoaded) } }
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var disposeBag = Set<AnyCancellable>()
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var viewModel: PublicTimelineViewModel!
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lazy var tableView: UITableView = {
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let tableView = UITableView()
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tableView.register(TimelinePostTableViewCell.self, forCellReuseIdentifier: String(describing: TimelinePostTableViewCell.self))
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tableView.rowHeight = UITableView.automaticDimension
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tableView.separatorStyle = .none
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return tableView
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}()
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deinit {
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os_log("%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
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}
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}
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extension PublicTimelineViewController {
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override func viewDidLoad() {
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super.viewDidLoad()
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tableView.translatesAutoresizingMaskIntoConstraints = false
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view.addSubview(tableView)
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tableView.backgroundColor = Asset.Colors.tootDark.color
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NSLayoutConstraint.activate([
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tableView.topAnchor.constraint(equalTo: view.topAnchor),
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tableView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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tableView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
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tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
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])
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viewModel.tableView = tableView
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tableView.delegate = self
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viewModel.setupDiffableDataSource(
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for: tableView,
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dependency: self,
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timelinePostTableViewCellDelegate: self
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)
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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viewModel.fetchLatest()
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.receive(on: DispatchQueue.main)
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.sink { completion in
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switch completion {
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case .failure(let error):
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os_log("%{public}s[%{public}ld], %{public}s: fetch user timeline latest response error: %s", ((#file as NSString).lastPathComponent), #line, #function, error.localizedDescription)
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case .finished:
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break
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}
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} receiveValue: { response in
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let tootsIDs = response.value.map { $0.id }
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self.viewModel.tootIDs.value = tootsIDs
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}
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.store(in: &viewModel.disposeBag)
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}
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}
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// MARK: - UITableViewDelegate
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extension PublicTimelineViewController: UITableViewDelegate {
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func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
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guard let diffableDataSource = viewModel.diffableDataSource else { return 100 }
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guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return 100 }
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guard let frame = viewModel.cellFrameCache.object(forKey: NSNumber(value: item.hashValue))?.cgRectValue else {
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return 200
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}
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return ceil(frame.height)
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}
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func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
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}
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func tableView(_ tableView: UITableView, didEndDisplaying cell: UITableViewCell, forRowAt indexPath: IndexPath) {
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guard let diffableDataSource = viewModel.diffableDataSource else { return }
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guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return }
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let key = item.hashValue
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let frame = cell.frame
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viewModel.cellFrameCache.setObject(NSValue(cgRect: frame), forKey: NSNumber(value: key))
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}
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}
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