54 lines
1.8 KiB
Swift
54 lines
1.8 KiB
Swift
//
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// StatusTablePrefetching.swift
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// Tusker
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//
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// Created by Shadowfacts on 1/18/21.
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// Copyright © 2021 Shadowfacts. All rights reserved.
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//
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import Foundation
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import CoreData
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protocol StatusTablePrefetching: TuskerNavigationDelegate {
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}
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extension StatusTablePrefetching {
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func prefetchStatuses(with ids: [String]) {
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let context = apiController.persistentContainer.prefetchBackgroundContext
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context.perform {
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guard let statuses = getStatusesWith(ids: ids, in: context) else {
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return
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}
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for status in statuses {
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_ = ImageCache.avatars.get(status.account.avatar, completion: nil)
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for attachment in status.attachments where attachment.kind == .image {
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_ = ImageCache.attachments.get(attachment.url, completion: nil)
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}
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}
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}
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}
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func cancelPrefetchingStatuses(with ids: [String]) {
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let context = apiController.persistentContainer.prefetchBackgroundContext
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context.perform {
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guard let statuses = getStatusesWith(ids: ids, in: context) else {
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return
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}
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for status in statuses {
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ImageCache.avatars.cancelWithoutCallback(status.account.avatar)
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for attachment in status.attachments where attachment.kind == .image {
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ImageCache.attachments.cancelWithoutCallback(attachment.url)
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}
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}
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}
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}
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}
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fileprivate func getStatusesWith(ids: [String], in context: NSManagedObjectContext) -> [StatusMO]? {
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let request: NSFetchRequest<StatusMO> = StatusMO.fetchRequest()
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request.predicate = NSPredicate(format: "id IN %@", ids)
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return try? context.fetch(request)
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}
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