139 lines
2.6 KiB
Swift
139 lines
2.6 KiB
Swift
//
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// ArticleArray.swift
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// NetNewsWire
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//
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// Created by Brent Simmons on 11/1/17.
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// Copyright © 2017 Ranchero Software. All rights reserved.
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//
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import Foundation
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import Articles
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typealias ArticleArray = [Article]
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extension Array where Element == Article {
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func articleAtRow(_ row: Int) -> Article? {
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if row < 0 || row == NSNotFound || row > count - 1 {
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return nil
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}
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return self[row]
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}
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func rowOfNextUnreadArticle(_ selectedRow: Int) -> Int? {
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if isEmpty {
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return nil
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}
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var rowIndex = selectedRow
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while(true) {
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rowIndex = rowIndex + 1
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if rowIndex >= count {
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break
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}
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let article = articleAtRow(rowIndex)!
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if !article.status.read {
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return rowIndex
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}
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}
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return nil
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}
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func articlesForIndexes(_ indexes: IndexSet) -> Set<Article> {
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return Set(indexes.compactMap{ (oneIndex) -> Article? in
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return articleAtRow(oneIndex)
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})
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}
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func sortedByDate(_ sortDirection: ComparisonResult, groupByFeed: Bool = false) -> ArticleArray {
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return ArticleSorter.sortedByDate(articles: self, sortDirection: sortDirection, groupByFeed: groupByFeed)
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}
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func canMarkAllAsRead() -> Bool {
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return anyArticleIsUnread()
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}
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func anyArticlePassesTest(_ test: ((Article) -> Bool)) -> Bool {
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for article in self {
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if test(article) {
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return true
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}
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}
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return false
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}
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func anyArticleIsRead() -> Bool {
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return anyArticlePassesTest { $0.status.read }
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}
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func anyArticleIsUnread() -> Bool {
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return anyArticlePassesTest { !$0.status.read }
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}
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func anyArticleIsStarred() -> Bool {
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return anyArticlePassesTest { $0.status.starred }
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}
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func anyArticleIsUnstarred() -> Bool {
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return anyArticlePassesTest { !$0.status.starred }
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}
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func unreadArticles() -> [Article]? {
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let articles = self.filter{ !$0.status.read }
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return articles.isEmpty ? nil : articles
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}
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func representSameArticlesInSameOrder(as otherArticles: [Article]) -> Bool {
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if self.count != otherArticles.count {
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return false
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}
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var i = 0
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for article in self {
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let otherArticle = otherArticles[i]
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if article.account != otherArticle.account || article.articleID != otherArticle.articleID {
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return false
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}
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i += 1
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}
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return true
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}
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func articlesAbove(article: Article) -> [Article] {
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guard let position = firstIndex(of: article) else {
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return []
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}
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let articlesAbove = self[..<position]
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return Array(articlesAbove)
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}
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func articlesBelow(article: Article) -> [Article] {
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guard let position = firstIndex(of: article) else {
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return []
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}
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var articlesBelow = Array(self[position...])
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guard !articlesBelow.isEmpty else {
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return []
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}
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articlesBelow.removeFirst()
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return articlesBelow
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}
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}
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