Convert edit list screen to collection view

This commit is contained in:
Shadowfacts 2023-10-27 17:13:49 -05:00
parent a46eaafbcf
commit 44021d3ad2
1 changed files with 152 additions and 58 deletions

View File

@ -10,18 +10,21 @@ import UIKit
import Pachyderm
import Combine
class EditListAccountsViewController: EnhancedTableViewController {
class EditListAccountsViewController: UIViewController, CollectionViewController {
private var list: List
let mastodonController: MastodonController
private let mastodonController: MastodonController
var changedAccounts = false
private var state = State.unloaded
var dataSource: DataSource!
var nextRange: RequestRange?
private(set) var changedAccounts = false
var searchResultsController: SearchResultsViewController!
var searchController: UISearchController!
private var dataSource: UICollectionViewDiffableDataSource<Section, Item>!
var collectionView: UICollectionView! { view as? UICollectionView }
private var nextRange: RequestRange?
private var searchResultsController: SearchResultsViewController!
private var searchController: UISearchController!
private var listRenamedCancellable: AnyCancellable?
@ -29,7 +32,7 @@ class EditListAccountsViewController: EnhancedTableViewController {
self.list = list
self.mastodonController = mastodonController
super.init(style: .plain)
super.init(nibName: nil, bundle: nil)
listChanged()
@ -46,29 +49,45 @@ class EditListAccountsViewController: EnhancedTableViewController {
fatalError("init(coder:) has not been implemeneted")
}
override func loadView() {
var config = UICollectionLayoutListConfiguration(appearance: .grouped)
config.itemSeparatorHandler = { [unowned self] indexPath, sectionConfig in
var config = sectionConfig
switch dataSource.itemIdentifier(for: indexPath)! {
case .loadingIndicator:
config.topSeparatorVisibility = .hidden
config.bottomSeparatorVisibility = .hidden
case .account(id: _):
config.topSeparatorInsets = TimelineStatusCollectionViewCell.separatorInsets
config.bottomSeparatorInsets = TimelineStatusCollectionViewCell.separatorInsets
}
return config
}
config.trailingSwipeActionsConfigurationProvider = { [unowned self] indexPath in
switch dataSource.itemIdentifier(for: indexPath) {
case .account(id: let id):
let remove = UIContextualAction(style: .destructive, title: "Remove") { [unowned self] _, _, completion in
Task {
await self.removeAccount(id: id)
completion(true)
}
}
return UISwipeActionsConfiguration(actions: [remove])
default:
return nil
}
}
let layout = UICollectionViewCompositionalLayout.list(using: config)
view = UICollectionView(frame: .zero, collectionViewLayout: layout)
collectionView.delegate = self
collectionView.allowsSelection = false
collectionView.backgroundColor = .appGroupedBackground
dataSource = createDataSource()
}
override func viewDidLoad() {
super.viewDidLoad()
tableView.register(UINib(nibName: "AccountTableViewCell", bundle: .main), forCellReuseIdentifier: "accountCell")
tableView.rowHeight = UITableView.automaticDimension
tableView.estimatedRowHeight = 66
tableView.allowsSelection = false
tableView.backgroundColor = .appGroupedBackground
dataSource = DataSource(tableView: tableView, cellProvider: { (tableView, indexPath, item) -> UITableViewCell? in
guard case let .account(id) = item else { fatalError() }
let cell = tableView.dequeueReusableCell(withIdentifier: "accountCell", for: indexPath) as! AccountTableViewCell
cell.delegate = self
cell.updateUI(accountID: id)
cell.configurationUpdateHandler = { cell, state in
cell.backgroundConfiguration = .appListGroupedCell(for: state)
}
return cell
})
dataSource.editListAccountsController = self
searchResultsController = SearchResultsViewController(mastodonController: mastodonController, scope: .people)
searchResultsController.following = true
searchResultsController.delegate = self
@ -87,7 +106,34 @@ class EditListAccountsViewController: EnhancedTableViewController {
}
navigationItem.rightBarButtonItem = UIBarButtonItem(title: NSLocalizedString("Rename", comment: "rename list button title"), style: .plain, target: self, action: #selector(renameButtonPressed))
}
private func createDataSource() -> UICollectionViewDiffableDataSource<Section, Item> {
let loadingCell = UICollectionView.CellRegistration<LoadingCollectionViewCell, Void> { cell, indexPath, itemIdentifier in
cell.indicator.startAnimating()
}
let accountCell = UICollectionView.CellRegistration<AccountCollectionViewCell, String> { [unowned self] cell, indexPath, itemIdentifier in
cell.delegate = self
cell.updateUI(accountID: itemIdentifier)
cell.configurationUpdateHandler = { cell, state in
cell.backgroundConfiguration = .appListGroupedCell(for: state)
}
}
return UICollectionViewDiffableDataSource(collectionView: collectionView) { collectionView, indexPath, itemIdentifier in
switch itemIdentifier {
case .loadingIndicator:
return collectionView.dequeueConfiguredReusableCell(using: loadingCell, for: indexPath, item: ())
case .account(id: let id):
return collectionView.dequeueConfiguredReusableCell(using: accountCell, for: indexPath, item: id)
}
}
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
clearSelectionOnAppear(animated: animated)
Task {
await loadAccounts()
}
@ -97,10 +143,21 @@ class EditListAccountsViewController: EnhancedTableViewController {
title = String(format: NSLocalizedString("Edit %@", comment: "edit list screen title"), list.title)
}
func loadAccounts() async {
@MainActor
private func loadAccounts() async {
guard state == .unloaded else { return }
state = .loading
async let results = try await mastodonController.run(List.getAccounts(list.id))
var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
snapshot.appendSections([.accounts])
snapshot.appendItems([.loadingIndicator])
await dataSource.apply(snapshot)
do {
let request = List.getAccounts(list.id)
let (accounts, pagination) = try await mastodonController.run(request)
let (accounts, pagination) = try await results
self.nextRange = pagination?.older
await withCheckedContinuation { continuation in
@ -109,20 +166,61 @@ class EditListAccountsViewController: EnhancedTableViewController {
}
}
var snapshot = self.dataSource.snapshot()
if snapshot.indexOfSection(.accounts) == nil {
snapshot.appendSections([.accounts])
} else {
snapshot.deleteItems(snapshot.itemIdentifiers(inSection: .accounts))
}
var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
snapshot.appendSections([.accounts])
snapshot.appendItems(accounts.map { .account(id: $0.id) })
await dataSource.apply(snapshot)
state = .loaded
} catch {
let config = ToastConfiguration(from: error, with: "Error Loading Accounts", in: self) { [unowned self] toast in
toast.dismissToast(animated: true)
await self.loadAccounts()
}
self.showToast(configuration: config, animated: true)
state = .unloaded
await dataSource.apply(.init())
}
}
private func loadNextPage() async {
guard state == .loaded,
let nextRange else { return }
state = .loading
async let results = try await mastodonController.run(List.getAccounts(list.id, range: nextRange))
let origSnapshot = dataSource.snapshot()
var snapshot = origSnapshot
snapshot.appendItems([.loadingIndicator])
await dataSource.apply(snapshot)
do {
let (accounts, pagination) = try await results
self.nextRange = pagination?.older
await withCheckedContinuation { continuation in
mastodonController.persistentContainer.addAll(accounts: accounts) {
continuation.resume()
}
}
var snapshot = origSnapshot
snapshot.appendItems(accounts.map { .account(id: $0.id) })
await dataSource.apply(snapshot)
state = .loaded
} catch {
let config = ToastConfiguration(from: error, with: "Error Loading Accounts", in: self) { [unowned self] toast in
toast.dismissToast(animated: true)
await self.loadNextPage()
}
self.showToast(configuration: config, animated: true)
state = .loaded
await dataSource.apply(origSnapshot)
}
}
@ -157,12 +255,6 @@ class EditListAccountsViewController: EnhancedTableViewController {
}
}
// MARK: - Table view delegate
override func tableView(_ tableView: UITableView, editingStyleForRowAt indexPath: IndexPath) -> UITableViewCell.EditingStyle {
return .delete
}
// MARK: - Interaction
@objc func renameButtonPressed() {
@ -171,29 +263,31 @@ class EditListAccountsViewController: EnhancedTableViewController {
}
extension EditListAccountsViewController {
enum State {
case unloaded
case loading
case loaded
case loadingOlder
}
}
extension EditListAccountsViewController {
enum Section: Hashable {
case accounts
}
enum Item: Hashable {
case loadingIndicator
case account(id: String)
}
class DataSource: UITableViewDiffableDataSource<Section, Item> {
weak var editListAccountsController: EditListAccountsViewController?
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
guard editingStyle == .delete,
case let .account(id) = itemIdentifier(for: indexPath) else {
return
}
}
extension EditListAccountsViewController: UICollectionViewDelegate {
func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
if state == .loaded,
indexPath.item == collectionView.numberOfItems(inSection: indexPath.section) - 1 {
Task {
await self.editListAccountsController?.removeAccount(id: id)
await loadNextPage()
}
}
}