mirror of
https://github.com/Ranchero-Software/NetNewsWire.git
synced 2024-12-23 16:20:53 +01:00
48 lines
1.2 KiB
Swift
48 lines
1.2 KiB
Swift
//
|
|
// UnreadCountProtocol.swift
|
|
// NetNewsWire
|
|
//
|
|
// Created by Brent Simmons on 4/8/16.
|
|
// Copyright © 2016 Ranchero Software, LLC. All rights reserved.
|
|
//
|
|
|
|
import Foundation
|
|
|
|
public extension Notification.Name {
|
|
static let UnreadCountDidInitialize = Notification.Name("UnreadCountDidInitialize")
|
|
static let UnreadCountDidChange = Notification.Name(rawValue: "UnreadCountDidChange")
|
|
}
|
|
|
|
public protocol UnreadCountProvider {
|
|
|
|
var unreadCount: Int { get }
|
|
|
|
func postUnreadCountDidChangeNotification()
|
|
func calculateUnreadCount<T: Collection>(_ children: T) -> Int
|
|
}
|
|
|
|
|
|
public extension UnreadCountProvider {
|
|
|
|
func postUnreadCountDidInitializeNotification() {
|
|
NotificationCenter.default.post(name: .UnreadCountDidInitialize, object: self, userInfo: nil)
|
|
}
|
|
|
|
func postUnreadCountDidChangeNotification() {
|
|
NotificationCenter.default.post(name: .UnreadCountDidChange, object: self, userInfo: nil)
|
|
}
|
|
|
|
func calculateUnreadCount<T: Collection>(_ children: T) -> Int {
|
|
let updatedUnreadCount = children.reduce(0) { (result, oneChild) -> Int in
|
|
if let oneUnreadCountProvider = oneChild as? UnreadCountProvider {
|
|
return result + oneUnreadCountProvider.unreadCount
|
|
}
|
|
return result
|
|
}
|
|
|
|
return updatedUnreadCount
|
|
}
|
|
}
|
|
|
|
|