115 lines
3.7 KiB
Swift
115 lines
3.7 KiB
Swift
//
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// DraftsManager.swift
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// ComposeUI
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//
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// Created by Shadowfacts on 10/22/18.
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// Copyright © 2018 Shadowfacts. All rights reserved.
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//
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import Foundation
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import Combine
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import OSLog
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private let logger = Logger(subsystem: Bundle.main.bundleIdentifier!, category: "DraftsManager")
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public class DraftsManager: Codable, ObservableObject {
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public private(set) static var shared: DraftsManager = load()
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private static var appGroupDirectory = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.space.vaccor.Tusker")!
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private static var archiveURL = appGroupDirectory.appendingPathComponent("drafts").appendingPathExtension("plist")
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private static let saveQueue = DispatchQueue(label: "DraftsManager", qos: .utility)
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public static func save() {
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saveQueue.async {
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let encoder = PropertyListEncoder()
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do {
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let data = try encoder.encode(shared)
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try data.write(to: archiveURL, options: .noFileProtection)
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} catch {
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logger.error("Save failed: \(String(describing: error))")
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}
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}
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}
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static func load() -> DraftsManager {
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let decoder = PropertyListDecoder()
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do {
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let data = try Data(contentsOf: archiveURL)
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let draftsManager = try decoder.decode(DraftsManager.self, from: data)
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return draftsManager
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} catch {
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logger.error("Load failed: \(String(describing: error))")
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return DraftsManager()
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}
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}
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public static func migrate(from url: URL) -> Result<Void, any Error> {
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do {
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try? FileManager.default.removeItem(at: archiveURL)
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try FileManager.default.moveItem(at: url, to: archiveURL)
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} catch {
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return .failure(error)
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}
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shared = load()
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return .success(())
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}
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private init() {}
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public required init(from decoder: Decoder) throws {
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let container = try decoder.container(keyedBy: CodingKeys.self)
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if let dict = try? container.decode([UUID: SafeDraft].self, forKey: .drafts) {
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self.drafts = dict.compactMapValues { $0.draft }
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} else if let array = try? container.decode([SafeDraft].self, forKey: .drafts) {
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self.drafts = array.reduce(into: [:], { partialResult, safeDraft in
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if let draft = safeDraft.draft {
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partialResult[draft.id] = draft
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}
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})
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} else {
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throw DecodingError.dataCorruptedError(forKey: .drafts, in: container, debugDescription: "expected drafts to be a dict or array of drafts")
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}
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}
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public func encode(to encoder: Encoder) throws {
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var container = encoder.container(keyedBy: CodingKeys.self)
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try container.encode(drafts, forKey: .drafts)
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}
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@Published private var drafts: [UUID: Draft] = [:]
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var sorted: [Draft] {
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return drafts.values.sorted(by: { $0.lastModified > $1.lastModified })
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}
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public func add(_ draft: Draft) {
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drafts[draft.id] = draft
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}
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public func remove(_ draft: Draft) {
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drafts.removeValue(forKey: draft.id)
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}
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public func getBy(id: UUID) -> Draft? {
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return drafts[id]
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}
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enum CodingKeys: String, CodingKey {
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case drafts
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}
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// a container that always succeeds at decoding
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// so if a single draft can't be decoded, we don't lose all drafts
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struct SafeDraft: Decodable {
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let draft: Draft?
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init(from decoder: Decoder) throws {
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let container = try decoder.singleValueContainer()
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self.draft = try? container.decode(Draft.self)
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}
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}
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}
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