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         "selection.ship_6"
  22     ]
  23
  24     init?(number: Int) {
  25
  26         guard case 1...4 = number else {
  27
  28             Logger.shared.log("Fleet number out of range")
  29             return nil
  30         }
  31
  32         fleetNumber = number
  33
  34         super.init()
  35
  36         deckController.entityName = Deck.entityName
  37         deckController.managedObjectContext = ServerDataStore.default.context
  38         deckController.fetchPredicate = NSPredicate(#keyPath(Deck.id), equal: number)
  39         let req = NSFetchRequest<NSFetchRequestResult>()
  40         req.entity = NSEntityDescription.entity(forEntityName: Deck.entityName,
  41                                                 in: deckController.managedObjectContext!)
  42         req.predicate = deckController.fetchPredicate
  43
  44         do {
  45
  46             try deckController.fetch(with: req, merge: false)
  47
  48         } catch {
  49
  50             Logger.shared.log("Fetch error")
  51             return nil
  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     @objc override class func keyPathsForValuesAffectingValue(forKey key: String) -> Set<String> {
  64
  65         switch key {
  66
  67         case #keyPath(name): return [#keyPath(deck.name)]
  68
  69         case #keyPath(id): return [#keyPath(deck.id)]
  70
  71         default: return []
  72         }
  73     }
  74
  75     @objc dynamic private(set) var ships: [Ship] = []
  76     @objc var deck: Deck?
  77
  78     @objc dynamic var name: String? { return deck?.name }
  79     @objc dynamic var id: NSNumber? { return deck?.id as NSNumber? }
  80
  81     subscript(_ index: Int) -> Ship? { return deck?[index] }
  82
  83     override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey: Any]?, context: UnsafeMutableRawPointer?) {
  84
  85         if context == &pDeckContext {
  86
  87             ships = (0..<Deck.maxShipCount).flatMap { self[$0] }
  88
  89             return
  90         }
  91
  92         super.observeValue(forKeyPath: keyPath, of: object, change: change, context: context)
  93     }
  94 }