53 lines
1.1 KiB
Swift
53 lines
1.1 KiB
Swift
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// ArticlesManager.swift
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// Evergreen
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//
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// Created by Brent Simmons on 5/9/16.
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// Copyright © 2016 Ranchero Software, LLC. All rights reserved.
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//
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import Foundation
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import Data
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final class ArticlesManager {
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private let cachedArticles: NSMapTable<NSString, Article> = NSMapTable.weakToWeakObjects()
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func uniquedArticles(_ fetchedArticles: Set<Article>, statusesManager: StatusesManager) -> Set<Article> {
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var articles = Set<Article>()
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for oneArticle in fetchedArticles {
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assert(oneArticle.status != nil)
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if let existingArticle = cachedArticle(oneArticle.articleID) {
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articles.insert(existingArticle)
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}
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else {
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cacheArticle(oneArticle)
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articles.insert(oneArticle)
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}
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}
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statusesManager.attachCachedStatuses(articles)
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return articles
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}
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func cachedArticle(_ articleID: String) -> Article? {
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return cachedArticles.object(forKey: articleID as NSString)
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}
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func cacheArticle(_ article: Article) {
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cachedArticles.setObject(article, forKey: article.articleID as NSString)
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}
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func cacheArticles(_ articles: Set<Article>) {
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articles.forEach { cacheArticle($0) }
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}
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}
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