ListenerSet

ListenerSet.swift

import Foundation

public func += (set: ListenerSet, listener: Listener) {
  set.list += listener
}

// An unordered set of Listeners.
public class ListenerSet {

  public subscript (key: String) -> Listener! {
    get { return hash[key] }
    set { hash[key] = newValue }
  }

  public func each (handler: Listener -> Void) {
    for listener in list { handler(listener) }
    for (_, listener) in hash { handler(listener) }
  }

  public func filter (target: AnyObject!) -> [Listener] {
    var listeners = [Listener]()
    each {
      if $0.targetID == getTargetID(target) {
        listeners.append($0)
      }
    }
    return listeners
  }

  public func filter (emitter: Emitter) -> [Listener] {
    var listeners = [Listener]()
    each {
      if let listener = $0 as? EmitterListener {
        if listener.emitter === emitter {
          listeners.append($0)
        }
      }
    }
    return listeners
  }

  public func filter (target: NSObject, _ keyPath: String! = nil) -> [Listener] {
    var listeners = [Listener]()
    each {
      if let listener = $0 as? ChangeListener<Any> {
        if listener.targetID == getTargetID(target) {
          if keyPath == nil || listener.keyPath == keyPath {
            listeners.append(listener)
          }
        }
      }
    }
    return listeners
  }




  lazy var hash = [String:Listener]()

  lazy var list = [Listener]()
}