76 lines
2.0 KiB
Swift
76 lines
2.0 KiB
Swift
//
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// ArticleFetcher.swift
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// NetNewsWire
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//
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// Created by Brent Simmons on 2/4/18.
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// Copyright © 2018 Ranchero Software, LLC. All rights reserved.
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//
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import Foundation
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import Articles
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public protocol ArticleFetcher {
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func fetchArticles() -> Set<Article>
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func fetchArticlesAsync(_ callback: @escaping ArticleSetBlock)
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func fetchUnreadArticles() -> Set<Article>
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func fetchUnreadArticlesAsync(_ callback: @escaping ArticleSetBlock)
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}
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extension Feed: ArticleFetcher {
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public func fetchArticles() -> Set<Article> {
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return account?.fetchArticles(.feed(self)) ?? Set<Article>()
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}
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public func fetchArticlesAsync(_ callback: @escaping ArticleSetBlock) {
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guard let account = account else {
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assertionFailure("Expected feed.account, but got nil.")
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callback(Set<Article>())
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return
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}
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account.fetchArticlesAsync(.feed(self), callback)
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}
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public func fetchUnreadArticles() -> Set<Article> {
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return fetchArticles().unreadArticles()
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}
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public func fetchUnreadArticlesAsync(_ callback: @escaping ArticleSetBlock) {
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guard let account = account else {
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assertionFailure("Expected feed.account, but got nil.")
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callback(Set<Article>())
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return
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}
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account.fetchArticlesAsync(.feed(self)) { callback($0.unreadArticles()) }
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}
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}
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extension Folder: ArticleFetcher {
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public func fetchArticles() -> Set<Article> {
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return fetchUnreadArticles()
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}
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public func fetchArticlesAsync(_ callback: @escaping ArticleSetBlock) {
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fetchUnreadArticlesAsync(callback)
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}
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public func fetchUnreadArticles() -> Set<Article> {
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guard let account = account else {
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assertionFailure("Expected folder.account, but got nil.")
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return Set<Article>()
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}
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return account.fetchArticles(.unreadForFolder(self))
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}
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public func fetchUnreadArticlesAsync(_ callback: @escaping ArticleSetBlock) {
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guard let account = account else {
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assertionFailure("Expected folder.account, but got nil.")
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callback(Set<Article>())
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return
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}
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account.fetchArticlesAsync(.unreadForFolder(self), callback)
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}
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}
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