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 class Fleet: NSObject {
  14     let fleetNumber: Int
  15     private let deckObserveKeys = [
  16         "selection.ship_0", "selection.ship_1", "selection.ship_2",
  17         "selection.ship_3", "selection.ship_4", "selection.ship_5",
  18         ]
  19
  20     init?(number: Int) {
  21         guard 1...4 ~= number
  22             else {
  23                 print("Fleet number out of range")
  24                 return nil
  25         }
  26         fleetNumber = number
  27         deckController = NSObjectController()
  28         super.init()
  29
  30         deckController.entityName = Deck.entityName
  31         deckController.managedObjectContext = ServerDataStore.default.managedObjectContext
  32         deckController.fetchPredicate = NSPredicate(format: "id = %ld", number)
  33         let req = NSFetchRequest<NSFetchRequestResult>()
  34         req.entity = NSEntityDescription.entity(forEntityName: Deck.entityName,
  35                                                 in: deckController.managedObjectContext!)
  36         req.predicate = deckController.fetchPredicate
  37         do {
  38             try deckController.fetch(with: req, merge: false)
  39         } catch {
  40             print("Fetch error")
  41             return nil
  42         }
  43         deck = deckController.content as? Deck
  44         deckObserveKeys.forEach { deckController.addObserver(self, forKeyPath: $0, context: &pDeckContext) }
  45     }
  46     deinit {
  47         deckObserveKeys.forEach { deckController.removeObserver(self, forKeyPath: $0) }
  48     }
  49
  50     dynamic private(set) var ships: [Ship] = []
  51     private let deckController: NSObjectController
  52     private weak var deck: Deck?
  53
  54     dynamic var name: String? { return deck?.name }
  55     func keyPathsForValuesAffectingName() -> Set<String> {
  56         return ["deck.name"]
  57     }
  58     dynamic var id: NSNumber? { return deck?.id as NSNumber? }
  59     func keyPathesForValuesAffectiongId() -> Set<String> {
  60         return ["deck.id"]
  61     }
  62
  63     subscript(_ index: Int) -> Ship? { return deck?[index] }
  64
  65     override func observeValue(forKeyPath keyPath: String?,
  66                                of object: Any?,
  67                                change: [NSKeyValueChangeKey : Any]?,
  68                                context: UnsafeMutableRawPointer?) {
  69         if context == &pDeckContext {
  70             ships = (0..<6).flatMap { return self[$0] }
  71             return
  72         }
  73         super.observeValue(forKeyPath: keyPath, of: object, change: change, context: context)
  74     }
  75 }