NetNewsWire/Shared/SmartFeeds/SmartFeed.swift
2019-12-16 22:45:59 -08:00

126 lines
2.9 KiB
Swift

//
// SmartFeed.swift
// NetNewsWire
//
// Created by Brent Simmons on 11/19/17.
// Copyright © 2017 Ranchero Software. All rights reserved.
//
import Foundation
import RSCore
import Articles
import ArticlesDatabase
import Account
final class SmartFeed: PseudoFeed {
public var defaultReadFilterType: ReadFilterType {
return .none
}
var feedID: FeedIdentifier? {
delegate.feedID
}
var nameForDisplay: String {
return delegate.nameForDisplay
}
var unreadCount = 0 {
didSet {
if unreadCount != oldValue {
postUnreadCountDidChangeNotification()
}
}
}
var smallIcon: IconImage? {
return delegate.smallIcon
}
#if os(macOS)
var pasteboardWriter: NSPasteboardWriting {
return SmartFeedPasteboardWriter(smartFeed: self)
}
#endif
private let delegate: SmartFeedDelegate
private var unreadCounts = [String: Int]()
init(delegate: SmartFeedDelegate) {
self.delegate = delegate
NotificationCenter.default.addObserver(self, selector: #selector(unreadCountDidChange(_:)), name: .UnreadCountDidChange, object: nil)
queueFetchUnreadCounts() // Fetch unread count at startup
}
@objc func unreadCountDidChange(_ note: Notification) {
if note.object is AppDelegate {
queueFetchUnreadCounts()
}
}
@objc func fetchUnreadCounts() {
let activeAccounts = AccountManager.shared.activeAccounts
// Remove any accounts that are no longer active or have been deleted
let activeAccountIDs = activeAccounts.map { $0.accountID }
unreadCounts.keys.forEach { accountID in
if !activeAccountIDs.contains(accountID) {
unreadCounts.removeValue(forKey: accountID)
}
}
if activeAccounts.isEmpty {
updateUnreadCount()
} else {
activeAccounts.forEach { self.fetchUnreadCount(for: $0) }
}
}
}
extension SmartFeed: ArticleFetcher {
func fetchArticles() throws -> Set<Article> {
return try delegate.fetchArticles()
}
func fetchArticlesAsync(_ completion: @escaping ArticleSetResultBlock) {
delegate.fetchArticlesAsync(completion)
}
func fetchUnreadArticles() throws -> Set<Article> {
return try delegate.fetchUnreadArticles()
}
func fetchUnreadArticlesAsync(_ completion: @escaping ArticleSetResultBlock) {
delegate.fetchUnreadArticlesAsync(completion)
}
}
private extension SmartFeed {
func queueFetchUnreadCounts() {
CoalescingQueue.standard.add(self, #selector(fetchUnreadCounts))
}
func fetchUnreadCount(for account: Account) {
delegate.fetchUnreadCount(for: account) { singleUnreadCountResult in
guard let accountUnreadCount = try? singleUnreadCountResult.get() else {
return
}
self.unreadCounts[account.accountID] = accountUnreadCount
self.updateUnreadCount()
}
}
func updateUnreadCount() {
unreadCount = AccountManager.shared.activeAccounts.reduce(0) { (result, account) -> Int in
if let oneUnreadCount = unreadCounts[account.accountID] {
return result + oneUnreadCount
}
return result
}
}
}