51 lines
1.9 KiB
Swift
51 lines
1.9 KiB
Swift
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//
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// StatusProvider+UITableViewDataSourcePrefetching.swift
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// Mastodon
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//
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// Created by MainasuK Cirno on 2021-3-10.
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//
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import UIKit
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import CoreData
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import CoreDataStack
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extension StatusTableViewCellDelegate where Self: StatusProvider {
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func handleTableView(_ tableView: UITableView, prefetchRowsAt indexPaths: [IndexPath]) {
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// prefetch reply toot
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guard let activeMastodonAuthenticationBox = context.authenticationService.activeMastodonAuthenticationBox.value else { return }
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let domain = activeMastodonAuthenticationBox.domain
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var statusObjectIDs: [NSManagedObjectID] = []
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for item in items(indexPaths: indexPaths) {
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switch item {
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case .homeTimelineIndex(let objectID, _):
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let homeTimelineIndex = managedObjectContext.object(with: objectID) as! HomeTimelineIndex
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statusObjectIDs.append(homeTimelineIndex.toot.objectID)
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case .toot(let objectID, _):
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statusObjectIDs.append(objectID)
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default:
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continue
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}
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}
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let backgroundManagedObjectContext = context.backgroundManagedObjectContext
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backgroundManagedObjectContext.perform { [weak self] in
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guard let self = self else { return }
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for objectID in statusObjectIDs {
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let toot = backgroundManagedObjectContext.object(with: objectID) as! Toot
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guard let replyToID = toot.inReplyToID, toot.replyTo == nil else {
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// skip
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continue
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}
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self.context.statusPrefetchingService.prefetchReplyTo(
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domain: domain,
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statusObjectID: toot.objectID,
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statusID: toot.id,
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replyToStatusID: replyToID,
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authorizationBox: activeMastodonAuthenticationBox
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)
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}
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}
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}
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}
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