NetNewsWire/Shared/Data/ArticleUtilities.swift

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//
// ArticleUtilities.swift
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// NetNewsWire
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//
// Created by Brent Simmons on 7/25/15.
// Copyright © 2015 Ranchero Software, LLC. All rights reserved.
//
import Foundation
import Articles
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import Account
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// These handle multiple accounts.
@discardableResult
func markArticles(_ articles: Set<Article>, statusKey: ArticleStatus.Key, flag: Bool) -> Set<Article>? {
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let d: [String: Set<Article>] = accountAndArticlesDictionary(articles)
var updatedArticles = Set<Article>()
for (accountID, accountArticles) in d {
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guard let account = AccountManager.shared.existingAccount(with: accountID) else {
continue
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}
if let accountUpdatedArticles = account.markArticles(accountArticles, statusKey: statusKey, flag: flag) {
updatedArticles.formUnion(accountUpdatedArticles)
}
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}
return updatedArticles
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}
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private func accountAndArticlesDictionary(_ articles: Set<Article>) -> [String: Set<Article>] {
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let d = Dictionary(grouping: articles, by: { $0.accountID })
return d.mapValues{ Set($0) }
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}
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extension Article {
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var feed: Feed? {
return account?.existingFeed(withFeedID: feedID)
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}
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var preferredLink: String? {
if let url = url, !url.isEmpty {
return url
}
if let externalURL = externalURL, !externalURL.isEmpty {
return externalURL
}
return nil
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}
var body: String? {
return contentHTML ?? contentText ?? summary
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}
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var logicalDatePublished: Date {
return datePublished ?? dateModified ?? status.dateArrived
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}
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}