Tusker/Tusker/CoreData/TimelinePosition.swift

92 lines
2.8 KiB
Swift

//
// TimelinePosition.swift
// Tusker
//
// Created by Shadowfacts on 12/23/22.
// Copyright © 2022 Shadowfacts. All rights reserved.
//
import Foundation
import CoreData
import Pachyderm
import UserAccounts
@objc(TimelinePosition)
public final class TimelinePosition: NSManagedObject {
@nonobjc class func fetchRequest(timeline: Timeline, account: UserAccountInfo) -> NSFetchRequest<TimelinePosition> {
let req = NSFetchRequest<TimelinePosition>(entityName: "TimelinePosition")
req.predicate = NSPredicate(format: "accountID = %@ AND timelineKind = %@", account.id, toTimelineKind(timeline))
req.sortDescriptors = [NSSortDescriptor(key: "createdAt", ascending: true)]
return req
}
@NSManaged public var accountID: String
@NSManaged public var createdAt: Date
@NSManaged private var timelineKind: String
@NSManaged public var centerStatusID: String?
@NSManaged private var statusIDsData: Data?
@LazilyDecoding(arrayFrom: \TimelinePosition.statusIDsData)
var statusIDs: [String]
var timeline: Timeline {
get { fromTimelineKind(timelineKind) }
set { timelineKind = toTimelineKind(newValue) }
}
convenience init(timeline: Timeline, account: UserAccountInfo, context: NSManagedObjectContext) {
self.init(context: context)
self.timeline = timeline
self.accountID = account.id
self.createdAt = Date()
}
func changedRemotely() {
_statusIDs.removeCachedValue()
}
}
// blergh, this is the simplest way of getting the Timeline into a format that A) CoreData can handle and B) is usable in the predicate
func toTimelineKind(_ timeline: Timeline) -> String {
switch timeline {
case .home:
return "home"
case .public(local: true):
return "local"
case .public(local: false):
return "federated"
case .direct:
return "direct"
case .tag(hashtag: let name):
return "hashtag:\(name)"
case .list(id: let id):
return "list:\(id)"
}
}
func fromTimelineKind(_ kind: String) -> Timeline {
if kind == "home" {
return .home
} else if kind == "local" {
return .public(local: true)
} else if kind == "federated" {
return .public(local: false)
} else if kind == "direct" {
return .direct
} else if kind.starts(with: "hashtag:") {
return .tag(hashtag: String(trimmingPrefix("hashtag:", of: kind)))
} else if kind.starts(with: "list:") {
return .list(id: String(trimmingPrefix("list:", of: kind)))
} else {
fatalError("invalid timeline kind \(kind)")
}
}
// replace with Collection.trimmingPrefix
@available(iOS, obsoleted: 16.0)
private func trimmingPrefix(_ prefix: String, of str: String) -> Substring {
return str[str.index(str.startIndex, offsetBy: prefix.count)...]
}