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