KCD/Fleet.swift

   1 //
   2 //  Fleet.swift
   3 //  KCD
   4 //
   5 //  Created by Hori,Masaki on 2017/01/22.
   6 //  Copyright © 2017年 Hori,Masaki. All rights reserved.
   7 //
   8
   9 import Cocoa
  10
  11 fileprivate var pDeckContext = 0
  12
  13 final class Fleet: NSObject {
  14
  15     let fleetNumber: Int
  16
  17     private let deckObserveKeys = [
  18         "selection.ship_0", "selection.ship_1", "selection.ship_2",
  19         "selection.ship_3", "selection.ship_4", "selection.ship_5"
  20     ]
  21
  22     init?(number: Int) {
  23
  24         guard case 1...4 = number
  25             else {
  26                 print("Fleet number out of range")
  27                 return nil
  28         }
  29
  30         fleetNumber = number
  31         deckController = NSObjectController()
  32
  33         super.init()
  34
  35         deckController.entityName = Deck.entityName
  36         deckController.managedObjectContext = ServerDataStore.default.context
  37         deckController.fetchPredicate = NSPredicate(format: "id = %ld", number)
  38         let req = NSFetchRequest<NSFetchRequestResult>()
  39         req.entity = NSEntityDescription.entity(forEntityName: Deck.entityName,
  40                                                 in: deckController.managedObjectContext!)
  41         req.predicate = deckController.fetchPredicate
  42
  43         do {
  44
  45             try deckController.fetch(with: req, merge: false)
  46
  47         } catch {
  48
  49             print("Fetch error")
  50             return nil
  51
  52         }
  53
  54         deck = deckController.content as? Deck
  55         deckObserveKeys.forEach { deckController.addObserver(self, forKeyPath: $0, context: &pDeckContext) }
  56     }
  57
  58     deinit {
  59
  60         deckObserveKeys.forEach { deckController.removeObserver(self, forKeyPath: $0) }
  61
  62     }
  63
  64     dynamic private(set) var ships: [Ship] = []
  65     private let deckController: NSObjectController
  66     private weak var deck: Deck?
  67
  68     dynamic var name: String? { return deck?.name }
  69     func keyPathsForValuesAffectingName() -> Set<String> {
  70
  71         return ["deck.name"]
  72     }
  73     dynamic var id: NSNumber? { return deck?.id as NSNumber? }
  74     func keyPathesForValuesAffectiongId() -> Set<String> {
  75
  76         return ["deck.id"]
  77     }
  78
  79     subscript(_ index: Int) -> Ship? { return deck?[index] }
  80
  81     override func observeValue(forKeyPath keyPath: String?,
  82                                of object: Any?,
  83                                change: [NSKeyValueChangeKey : Any]?,
  84                                context: UnsafeMutableRawPointer?) {
  85
  86         if context == &pDeckContext {
  87
  88             ships = (0..<6).flatMap { return self[$0] }
  89
  90             return
  91         }
  92
  93         super.observeValue(forKeyPath: keyPath, of: object, change: change, context: context)
  94     }
  95 }