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 private var pDeckContext = 0
  12
  13 final class Fleet: NSObject {
  14
  15     let fleetNumber: Int
  16     private let deckController = NSObjectController()
  17
  18     private let deckObserveKeys = [
  19         "selection.ship_0", "selection.ship_1", "selection.ship_2",
  20         "selection.ship_3", "selection.ship_4", "selection.ship_5"
  21     ]
  22
  23     init?(number: Int) {
  24
  25         guard case 1...4 = number else {
  26
  27             print("Fleet number out of range")
  28             return nil
  29         }
  30
  31         fleetNumber = number
  32
  33         super.init()
  34
  35         deckController.entityName = Deck.entityName
  36         deckController.managedObjectContext = ServerDataStore.default.context
  37         deckController.fetchPredicate = NSPredicate(#keyPath(Deck.id), equal: 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     @objc override class func keyPathsForValuesAffectingValue(forKey key: String) -> Set<String> {
  65
  66         switch key {
  67
  68         case #keyPath(name): return [#keyPath(deck.name)]
  69
  70         case #keyPath(id): return [#keyPath(deck.id)]
  71
  72         default: return []
  73         }
  74     }
  75
  76     @objc dynamic private(set) var ships: [Ship] = []
  77     @objc var deck: Deck?
  78
  79     @objc dynamic var name: String? { return deck?.name }
  80     @objc dynamic var id: NSNumber? { return deck?.id as NSNumber? }
  81
  82     subscript(_ index: Int) -> Ship? { return deck?[index] }
  83
  84     override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, 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 }