NetNewsWire/Shared/Commands/MarkStatusCommand.swift

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//
// MarkStatusCommand.swift
2018-08-29 07:18:24 +02:00
// NetNewsWire
//
// Created by Brent Simmons on 10/26/17.
// Copyright © 2017 Ranchero Software. All rights reserved.
//
import Foundation
import RSCore
import Articles
// Mark articles read/unread, starred/unstarred, deleted/undeleted.
final class MarkStatusCommand: UndoableCommand {
let undoActionName: String
let redoActionName: String
let articles: Set<Article>
let undoManager: UndoManager
let flag: Bool
let statusKey: ArticleStatus.Key
var completion: (() -> Void)? = nil
init?(initialArticles: [Article], statusKey: ArticleStatus.Key, flag: Bool, undoManager: UndoManager, completion: (() -> Void)? = nil) {
// Filter out articles that already have the desired status or can't be marked.
let articlesToMark = MarkStatusCommand.filteredArticles(initialArticles, statusKey, flag)
if articlesToMark.isEmpty {
return nil
}
self.articles = Set(articlesToMark)
self.flag = flag
self.statusKey = statusKey
self.undoManager = undoManager
self.completion = completion
let actionName = MarkStatusCommand.actionName(statusKey, flag)
self.undoActionName = actionName
self.redoActionName = actionName
}
convenience init?(initialArticles: [Article], markingRead: Bool, undoManager: UndoManager, completion: (() -> Void)? = nil) {
self.init(initialArticles: initialArticles, statusKey: .read, flag: markingRead, undoManager: undoManager, completion: completion)
}
convenience init?(initialArticles: [Article], markingStarred: Bool, undoManager: UndoManager, completion: (() -> Void)? = nil) {
self.init(initialArticles: initialArticles, statusKey: .starred, flag: markingStarred, undoManager: undoManager, completion: completion)
}
func perform() {
mark(statusKey, flag)
registerUndo()
}
func undo() {
mark(statusKey, !flag)
registerRedo()
}
}
private extension MarkStatusCommand {
func mark(_ statusKey: ArticleStatus.Key, _ flag: Bool) {
markArticles(articles, statusKey: statusKey, flag: flag, completion: completion)
completion = nil
}
static private let markReadActionName = NSLocalizedString("Mark Read", comment: "command")
static private let markUnreadActionName = NSLocalizedString("Mark Unread", comment: "command")
static private let markStarredActionName = NSLocalizedString("Mark Starred", comment: "command")
static private let markUnstarredActionName = NSLocalizedString("Mark Unstarred", comment: "command")
static func actionName(_ statusKey: ArticleStatus.Key, _ flag: Bool) -> String {
switch statusKey {
case .read:
return flag ? markReadActionName : markUnreadActionName
case .starred:
return flag ? markStarredActionName : markUnstarredActionName
}
}
static func filteredArticles(_ articles: [Article], _ statusKey: ArticleStatus.Key, _ flag: Bool) -> [Article] {
return articles.filter{ article in
guard article.status.boolStatus(forKey: statusKey) != flag else { return false }
guard statusKey == .read else { return true }
guard !article.status.read || article.isAvailableToMarkUnread else { return false }
return true
}
}
}