137 lines
2.5 KiB
Swift
137 lines
2.5 KiB
Swift
//
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// ArticleArray.swift
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// Evergreen
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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 indexesForArticleIDs(_ articleIDs: Set<String>) -> IndexSet {
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var indexes = IndexSet()
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articleIDs.forEach { (articleID) in
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let oneIndex = rowForArticleID(articleID)
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if oneIndex != NSNotFound {
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indexes.insert(oneIndex)
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}
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}
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return indexes
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}
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func sortedByDate(_ sortDirection: ComparisonResult) -> ArticleArray {
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let articles = sorted { (article1, article2) -> Bool in
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if sortDirection == .orderedDescending {
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return article1.logicalDatePublished > article2.logicalDatePublished
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}
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return article1.logicalDatePublished < article2.logicalDatePublished
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}
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return articles
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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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}
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private extension Array where Element == Article {
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func rowForArticleID(_ articleID: String) -> Int {
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if let index = index(where: { $0.articleID == articleID }) {
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return index
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}
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return NSNotFound
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}
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func rowForArticle(_ article: Article) -> Int {
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return rowForArticleID(article.articleID)
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}
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}
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