mastodon-ios/Mastodon/Diffiable/Section/TimelineSection.swift

130 lines
6.8 KiB
Swift

//
// TimelineSection.swift
// Mastodon
//
// Created by sxiaojian on 2021/1/27.
//
import Combine
import CoreData
import CoreDataStack
import os.log
import UIKit
enum TimelineSection: Equatable, Hashable {
case main
}
extension TimelineSection {
static func tableViewDiffableDataSource(
for tableView: UITableView,
dependency: NeedsDependency,
managedObjectContext: NSManagedObjectContext,
timestampUpdatePublisher: AnyPublisher<Date, Never>,
timelinePostTableViewCellDelegate: TimelinePostTableViewCellDelegate,
timelineMiddleLoaderTableViewCellDelegate: TimelineMiddleLoaderTableViewCellDelegate?
) -> UITableViewDiffableDataSource<TimelineSection, Item> {
UITableViewDiffableDataSource(tableView: tableView) { [weak timelinePostTableViewCellDelegate, weak timelineMiddleLoaderTableViewCellDelegate] tableView, indexPath, item -> UITableViewCell? in
guard let timelinePostTableViewCellDelegate = timelinePostTableViewCellDelegate else { return UITableViewCell() }
switch item {
case .homeTimelineIndex(objectID: let objectID, attribute: _):
let cell = tableView.dequeueReusableCell(withIdentifier: String(describing: TimelinePostTableViewCell.self), for: indexPath) as! TimelinePostTableViewCell
// configure cell
managedObjectContext.performAndWait {
let timelineIndex = managedObjectContext.object(with: objectID) as! HomeTimelineIndex
TimelineSection.configure(cell: cell, timestampUpdatePublisher: timestampUpdatePublisher, toot: timelineIndex.toot, requestUserID: timelineIndex.userID)
}
cell.delegate = timelinePostTableViewCellDelegate
return cell
case .toot(let objectID):
let cell = tableView.dequeueReusableCell(withIdentifier: String(describing: TimelinePostTableViewCell.self), for: indexPath) as! TimelinePostTableViewCell
let activeMastodonAuthenticationBox = dependency.context.authenticationService.activeMastodonAuthenticationBox.value
let requestUserID = activeMastodonAuthenticationBox?.userID ?? ""
// configure cell
managedObjectContext.performAndWait {
let toot = managedObjectContext.object(with: objectID) as! Toot
TimelineSection.configure(cell: cell, timestampUpdatePublisher: timestampUpdatePublisher, toot: toot, requestUserID:requestUserID)
}
cell.delegate = timelinePostTableViewCellDelegate
return cell
case .publicMiddleLoader(let upperTimelineTootID):
let cell = tableView.dequeueReusableCell(withIdentifier: String(describing: TimelineMiddleLoaderTableViewCell.self), for: indexPath) as! TimelineMiddleLoaderTableViewCell
cell.delegate = timelineMiddleLoaderTableViewCellDelegate
timelineMiddleLoaderTableViewCellDelegate?.configure(cell: cell, upperTimelineTootID: upperTimelineTootID,timelineIndexobjectID: nil)
return cell
case .homeMiddleLoader(let upperTimelineIndexObjectID):
let cell = tableView.dequeueReusableCell(withIdentifier: String(describing: TimelineMiddleLoaderTableViewCell.self), for: indexPath) as! TimelineMiddleLoaderTableViewCell
cell.delegate = timelineMiddleLoaderTableViewCellDelegate
timelineMiddleLoaderTableViewCellDelegate?.configure(cell: cell, upperTimelineTootID: nil,timelineIndexobjectID: upperTimelineIndexObjectID)
return cell
case .bottomLoader:
let cell = tableView.dequeueReusableCell(withIdentifier: String(describing: TimelineBottomLoaderTableViewCell.self), for: indexPath) as! TimelineBottomLoaderTableViewCell
cell.activityIndicatorView.startAnimating()
return cell
}
}
}
static func configure(
cell: TimelinePostTableViewCell,
timestampUpdatePublisher: AnyPublisher<Date, Never>,
toot: Toot,
requestUserID: String
) {
// set name username avatar
cell.timelinePostView.nameLabel.text = toot.author.displayName
cell.timelinePostView.usernameLabel.text = "@" + toot.author.username
cell.timelinePostView.avatarImageView.af.setImage(
withURL: URL(string: toot.author.avatar)!,
placeholderImage: UIImage.placeholder(color: .systemFill),
imageTransition: .crossDissolve(0.2)
)
// set text
cell.timelinePostView.activeTextLabel.config(content: toot.content)
// toolbar
let isLike = (toot.reblog ?? toot).favouritedBy.flatMap({ $0.contains(where: { $0.id == requestUserID }) }) ?? false
let favoriteCountTitle: String = {
let count = (toot.reblog ?? toot).favouritesCount.intValue
return TimelineSection.formattedNumberTitleForActionButton(count)
}()
cell.timelinePostView.actionToolbarContainer.starButton.setTitle(favoriteCountTitle, for: .normal)
cell.timelinePostView.actionToolbarContainer.isStarButtonHighlight = isLike
// set date
let createdAt = (toot.reblog ?? toot).createdAt
timestampUpdatePublisher
.sink { _ in
cell.timelinePostView.dateLabel.text = createdAt.shortTimeAgoSinceNow
}
.store(in: &cell.disposeBag)
// observe model change
ManagedObjectObserver.observe(object: toot.reblog ?? toot)
.receive(on: DispatchQueue.main)
.sink { _ in
// do nothing
} receiveValue: { change in
guard case let .update(object) = change.changeType,
let newToot = object as? Toot else { return }
let targetToot = newToot.reblog ?? newToot
let isLike = targetToot.favouritedBy.flatMap({ $0.contains(where: { $0.id == requestUserID }) }) ?? false
let favoriteCount = targetToot.favouritesCount.intValue
let favoriteCountTitle = TimelineSection.formattedNumberTitleForActionButton(favoriteCount)
cell.timelinePostView.actionToolbarContainer.starButton.setTitle(favoriteCountTitle, for: .normal)
cell.timelinePostView.actionToolbarContainer.isStarButtonHighlight = isLike
os_log("%{public}s[%{public}ld], %{public}s: like count label for tweet %s did update: %ld", ((#file as NSString).lastPathComponent), #line, #function, targetToot.id, favoriteCount )
}
.store(in: &cell.disposeBag)
}
}
extension TimelineSection {
private static func formattedNumberTitleForActionButton(_ number: Int?) -> String {
guard let number = number, number > 0 else { return "" }
return String(number)
}
}