forked from shadowfacts/Tusker
322 lines
13 KiB
Swift
322 lines
13 KiB
Swift
//
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// ProfileStatusesViewController.swift
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// Tusker
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//
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// Created by Shadowfacts on 7/3/20.
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// Copyright © 2020 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 ProfileStatusesViewController: EnhancedTableViewController {
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weak var mastodonController: MastodonController!
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private(set) var headerView: ProfileHeaderView!
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var accountID: String!
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let kind: Kind
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private var pinnedStatuses: [(id: String, state: StatusState)] = []
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private var timelineSegments: [[(id: String, state: StatusState)]] = []
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private var older: RequestRange?
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private var newer: RequestRange?
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var loaded = false
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init(accountID: String?, kind: Kind, mastodonController: MastodonController) {
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self.accountID = accountID
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self.kind = kind
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self.mastodonController = mastodonController
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super.init(style: .plain)
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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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view.backgroundColor = .systemBackground
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refreshControl = UIRefreshControl()
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refreshControl!.addTarget(self, action: #selector(refreshStatuses(_:)), for: .valueChanged)
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tableView.rowHeight = UITableView.automaticDimension
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tableView.estimatedRowHeight = 140
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tableView.register(UINib(nibName: "TimelineStatusTableViewCell", bundle: .main), forCellReuseIdentifier: "statusCell")
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tableView.prefetchDataSource = self
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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if !loaded,
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let accountID = accountID,
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let account = mastodonController.persistentContainer.account(for: accountID) {
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updateUI(account: account)
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}
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}
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func updateUI(account: AccountMO) {
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guard !loaded else { return }
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loaded = true
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if kind == .statuses {
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getPinnedStatuses { (response) in
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guard case let .success(statuses, _) = response else {
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// todo: error message
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return
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}
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if statuses.isEmpty { return }
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self.mastodonController.persistentContainer.addAll(statuses: statuses) {
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self.pinnedStatuses = statuses.map { ($0.id, .unknown) }
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let indexPaths = (0..<statuses.count).map { IndexPath(row: $0, section: 0) }
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DispatchQueue.main.async {
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UIView.performWithoutAnimation {
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self.tableView.insertRows(at: indexPaths, with: .none)
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}
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}
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}
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}
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}
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getStatuses { (response) in
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guard case let .success(statuses, pagination) = response else {
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// todo: error message
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return
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}
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if statuses.isEmpty { return }
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self.mastodonController.persistentContainer.addAll(statuses: statuses) {
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self.timelineSegments.append(statuses.map { ($0.id, .unknown) })
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self.older = pagination?.older
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self.newer = pagination?.newer
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DispatchQueue.main.async {
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UIView.performWithoutAnimation {
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self.tableView.insertSections(IndexSet(integer: 1), with: .none)
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}
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}
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}
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}
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}
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private func getStatuses(for range: RequestRange = .default, completion: @escaping Client.Callback<[Status]>) {
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let request: Request<[Status]>
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switch kind {
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case .statuses:
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request = Account.getStatuses(accountID, range: range, onlyMedia: false, pinned: false, excludeReplies: true)
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case .withReplies:
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request = Account.getStatuses(accountID, range: range, onlyMedia: false, pinned: false, excludeReplies: false)
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case .onlyMedia:
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request = Account.getStatuses(accountID, range: range, onlyMedia: true, pinned: false, excludeReplies: false)
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}
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mastodonController.run(request, completion: completion)
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}
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private func getPinnedStatuses(completion: @escaping Client.Callback<[Status]>) {
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let request = Account.getStatuses(accountID, range: .default, onlyMedia: false, pinned: true, excludeReplies: false)
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mastodonController.run(request, completion: completion)
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}
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// MARK: Interaction
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@objc func refreshStatuses(_ sender: UIRefreshControl) {
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guard let newer = newer else { return }
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getStatuses(for: newer) { (response) in
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guard case let .success(newStatuses, pagination) = response else {
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// todo: error message
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return
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}
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self.mastodonController.persistentContainer.addAll(statuses: newStatuses) {
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// if there's no newer request range (because no statuses were returned),
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// we don't want to change the current newer pagination, so that we can
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// continue to load statuses newer than whatever was last loaded
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if let newer = pagination?.newer {
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self.newer = newer
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}
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let indexPaths = (0..<newStatuses.count).map { IndexPath(row: $0, section: 1) }
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DispatchQueue.main.async {
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self.timelineSegments[0].insert(contentsOf: newStatuses.map { ($0.id, .unknown) }, at: 0)
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UIView.performWithoutAnimation {
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self.tableView.insertRows(at: indexPaths, with: .none)
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}
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self.refreshControl!.endRefreshing()
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}
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}
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}
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if kind == .statuses {
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getPinnedStatuses { (response) in
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guard case let .success(newPinnedStatuses, _) = response else {
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// todo: error message
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return
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}
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self.mastodonController.persistentContainer.addAll(statuses: newPinnedStatuses) {
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let oldPinnedStatuses = self.pinnedStatuses
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let pinnedStatuses = newPinnedStatuses.map { (status) -> (id: String, state: StatusState) in
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let state: StatusState
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if let (_, oldState) = oldPinnedStatuses.first(where: { $0.id == status.id }) {
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state = oldState
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} else {
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state = .unknown
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}
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return (status.id, state)
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}
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DispatchQueue.main.async {
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self.pinnedStatuses = pinnedStatuses
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UIView.performWithoutAnimation {
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self.tableView.reloadSections(IndexSet(integer: 0), with: .none)
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}
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}
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}
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}
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}
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}
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// MARK: Table view data source
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override func numberOfSections(in tableView: UITableView) -> Int {
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// 1 for pinned, rest for timeline
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return 1 + timelineSegments.count
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}
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override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
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if section == 0 {
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return pinnedStatuses.count
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} else {
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return timelineSegments[section - 1].count
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}
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}
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override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
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let cell = tableView.dequeueReusableCell(withIdentifier: "statusCell", for: indexPath) as! TimelineStatusTableViewCell
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cell.delegate = self
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if indexPath.section == 0 {
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cell.showPinned = true
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let (id, state) = pinnedStatuses[indexPath.row]
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cell.updateUI(statusID: id, state: state)
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} else {
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cell.showPinned = false
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let (id, state) = timelineSegments[indexPath.section - 1][indexPath.row]
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cell.updateUI(statusID: id, state: state)
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}
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return cell
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}
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override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
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// todo: if scrolling up, remove statuses at bottom like timeline VC
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// load older statuses if at bottom
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if timelineSegments.count > 0,
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indexPath.section == timelineSegments.count,
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indexPath.row == timelineSegments[indexPath.section - 1].count - 1 {
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guard let older = older else { return }
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getStatuses(for: older) { (response) in
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guard case let .success(newStatuses, pagination) = response else {
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// todo: error message
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return
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}
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self.mastodonController.persistentContainer.addAll(statuses: newStatuses) {
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// if there is no older request range, we want to set ours to nil
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// otherwise we would end up loading the same statuses again
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self.older = pagination?.older
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DispatchQueue.main.async {
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let start = self.timelineSegments[indexPath.section - 1].count
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let indexPaths = (0..<newStatuses.count).map { IndexPath(row: start + $0, section: indexPath.section) }
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self.timelineSegments[indexPath.section - 1].append(contentsOf: newStatuses.map { ($0.id, .unknown) })
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UIView.performWithoutAnimation {
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self.tableView.insertRows(at: indexPaths, with: .none)
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}
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}
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}
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}
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}
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}
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override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
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return true
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}
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override func tableView(_ tableView: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
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return (tableView.cellForRow(at: indexPath) as? TableViewSwipeActionProvider)?.leadingSwipeActionsConfiguration()
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}
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override func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
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return (tableView.cellForRow(at: indexPath) as? TableViewSwipeActionProvider)?.trailingSwipeActionsConfiguration()
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}
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}
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extension ProfileStatusesViewController {
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enum Kind {
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case statuses, withReplies, onlyMedia
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}
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}
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extension ProfileStatusesViewController: StatusTableViewCellDelegate {
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var apiController: MastodonController { mastodonController }
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func statusCellCollapsedStateChanged(_ cell: BaseStatusTableViewCell) {
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// causes the table view to recalculate the cell heights
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tableView.beginUpdates()
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tableView.endUpdates()
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}
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}
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extension ProfileStatusesViewController: UITableViewDataSourcePrefetching {
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func tableView(_ tableView: UITableView, prefetchRowsAt indexPaths: [IndexPath]) {
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for indexPath in indexPaths {
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let statusID: String
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if indexPath.section == 0 {
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statusID = pinnedStatuses[indexPath.row].id
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} else {
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statusID = timelineSegments[indexPath.section - 1][indexPath.row].id
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}
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guard let status = mastodonController.persistentContainer.status(for: statusID) else { continue }
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_ = ImageCache.avatars.get(status.account.avatar, completion: nil)
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for attachment in status.attachments where attachment.kind == .image {
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_ = ImageCache.attachments.get(attachment.url, completion: nil)
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}
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}
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}
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func tableView(_ tableView: UITableView, cancelPrefetchingForRowsAt indexPaths: [IndexPath]) {
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for indexPath in indexPaths {
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let statusID: String
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if indexPath.section == 0 {
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statusID = pinnedStatuses[indexPath.row].id
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} else {
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statusID = timelineSegments[indexPath.section - 1][indexPath.row].id
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}
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guard let status = mastodonController.persistentContainer.status(for: statusID) else { continue }
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ImageCache.avatars.cancelWithoutCallback(status.account.avatar)
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for attachment in status.attachments where attachment.kind == .image {
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ImageCache.avatars.cancelWithoutCallback(attachment.url)
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}
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}
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}
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}
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