109 lines
3.6 KiB
Swift
109 lines
3.6 KiB
Swift
//
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// AccountListViewModel.swift
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// Mastodon
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//
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// Created by Cirno MainasuK on 2021-9-13.
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//
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import UIKit
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import Combine
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import CoreData
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import CoreDataStack
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import MastodonMeta
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final class AccountListViewModel {
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var disposeBag = Set<AnyCancellable>()
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// input
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let context: AppContext
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// output
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let authentications = CurrentValueSubject<[Item], Never>([])
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var diffableDataSource: UITableViewDiffableDataSource<Section, Item>!
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init(context: AppContext) {
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self.context = context
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context.authenticationService.mastodonAuthentications
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.map { authentications in
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return authentications.map {
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Item.authentication(objectID: $0.objectID)
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}
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}
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.assign(to: \.value, on: authentications)
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.store(in: &disposeBag)
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authentications
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.receive(on: DispatchQueue.main)
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.sink { [weak self] authentications in
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guard let self = self else { return }
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guard let diffableDataSource = self.diffableDataSource else { return }
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var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
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snapshot.appendSections([.main])
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snapshot.appendItems(authentications, toSection: .main)
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snapshot.appendItems([.addAccount], toSection: .main)
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diffableDataSource.apply(snapshot)
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}
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.store(in: &disposeBag)
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}
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}
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extension AccountListViewModel {
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enum Section: Hashable {
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case main
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}
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enum Item: Hashable {
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case authentication(objectID: NSManagedObjectID)
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case addAccount
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}
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func setupDiffableDataSource(
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tableView: UITableView,
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managedObjectContext: NSManagedObjectContext
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) {
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diffableDataSource = UITableViewDiffableDataSource(tableView: tableView) { tableView, indexPath, item in
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switch item {
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case .authentication(let objectID):
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let authentication = managedObjectContext.object(with: objectID) as! MastodonAuthentication
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let user = authentication.user
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let cell = tableView.dequeueReusableCell(withIdentifier: String(describing: AccountListTableViewCell.self), for: indexPath) as! AccountListTableViewCell
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AccountListViewModel.configure(cell: cell, user: user)
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return cell
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case .addAccount:
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let cell = tableView.dequeueReusableCell(withIdentifier: String(describing: AddAccountTableViewCell.self), for: indexPath) as! AddAccountTableViewCell
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return cell
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}
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}
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var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
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snapshot.appendSections([.main])
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diffableDataSource?.apply(snapshot)
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}
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static func configure(
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cell: AccountListTableViewCell,
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user: MastodonUser
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) {
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// avatar
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cell.configure(with: AvatarConfigurableViewConfiguration(avatarImageURL: user.avatarImageURL()))
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// name
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do {
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let content = MastodonContent(content: user.displayNameWithFallback, emojis: user.emojiMeta)
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let metaContent = try MastodonMetaContent.convert(document: content)
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cell.nameLabel.configure(content: metaContent)
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} catch {
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assertionFailure()
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cell.nameLabel.configure(content: PlaintextMetaContent(string: user.displayNameWithFallback))
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}
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// username
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cell.usernameLabel.configure(content: PlaintextMetaContent(string: user.acctWithDomain))
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}
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}
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