forked from zelo72/mastodon-ios
51 lines
2.0 KiB
Swift
51 lines
2.0 KiB
Swift
//
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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 status
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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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let items = self.items(indexPaths: indexPaths)
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let managedObjectContext = context.managedObjectContext
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managedObjectContext.perform { [weak self] in
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guard let self = self else { return }
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var statuses: [Status] = []
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for item in items {
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switch item {
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case .homeTimelineIndex(let objectID, _):
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guard let homeTimelineIndex = try? managedObjectContext.existingObject(with: objectID) as? HomeTimelineIndex else { continue }
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statuses.append(homeTimelineIndex.status)
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case .status(let objectID, _):
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guard let status = try? managedObjectContext.existingObject(with: objectID) as? Status else { continue }
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statuses.append(status)
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default:
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continue
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}
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}
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for status in statuses {
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if let replyToID = status.inReplyToID, status.replyTo == nil {
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self.context.statusPrefetchingService.prefetchReplyTo(
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domain: domain,
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statusObjectID: status.objectID,
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statusID: status.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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} // end for in
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} // end context.perform
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} // end func
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}
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