Tusker/Tusker/SavedDataManager.swift

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//
// SavedDataManager.swift
// Tusker
//
// Created by Shadowfacts on 12/19/19.
// Copyright © 2019 Shadowfacts. All rights reserved.
//
import Foundation
import Pachyderm
import CoreData
class SavedDataManager: Codable {
private static var documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
private static var archiveURL = SavedDataManager.documentsDirectory.appendingPathComponent("saved_data").appendingPathExtension("plist")
static func load() -> SavedDataManager? {
let decoder = PropertyListDecoder()
if let data = try? Data(contentsOf: archiveURL),
let savedHashtagsManager = try? decoder.decode(Self.self, from: data) {
return savedHashtagsManager
}
return nil
}
static func destroy() throws {
try FileManager.default.removeItem(at: archiveURL)
}
private init() {}
private(set) var savedHashtags: [String: [Hashtag]] = [:]
private(set) var savedInstances: [String: [URL]] = [:]
var accountIDs: Set<String> {
var s = Set<String>()
savedHashtags.keys.forEach { s.insert($0) }
savedInstances.keys.forEach { s.insert($0) }
return s
}
private func save() {
let encoder = PropertyListEncoder()
let data = try? encoder.encode(self)
try? data?.write(to: SavedDataManager.archiveURL, options: .noFileProtection)
}
func migrateToCoreData(accountID: String, context: NSManagedObjectContext) throws {
var changed = false
if let hashtags = savedHashtags[accountID] {
let objects: [[String: Any]] = hashtags.map {
["url": $0.url, "name": $0.name]
}
let hashtagsReq = NSBatchInsertRequest(entity: SavedHashtag.entity(), objects: objects)
try context.execute(hashtagsReq)
savedHashtags.removeValue(forKey: accountID)
changed = true
}
if let instances = savedInstances[accountID] {
let objects = instances.map {
["url": $0]
}
let instancesReq = NSBatchInsertRequest(entity: SavedInstance.entity(), objects: objects)
try context.execute(instancesReq)
savedInstances.removeValue(forKey: accountID)
changed = true
}
if changed {
save()
}
}
}
extension Foundation.Notification.Name {
static let savedHashtagsChanged = Notification.Name("savedHashtagsChanged")
static let savedInstancesChanged = Notification.Name("savedInstancesChanged")
}