NetNewsWire/Shared/Widget/WidgetDataEncoder.swift

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//
// WidgetDataEncoder.swift
// NetNewsWire
//
// Created by Stuart Breckenridge on 18/11/20.
// Copyright © 2020 Ranchero Software. All rights reserved.
//
import Foundation
import WidgetKit
import os.log
import UIKit
import RSCore
import Articles
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public final class WidgetDataEncoder {
private let log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "Application")
private var backgroundTaskID: UIBackgroundTaskIdentifier!
private lazy var appGroup = Bundle.main.object(forInfoDictionaryKey: "AppGroup") as! String
private lazy var containerURL = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: appGroup)
private lazy var dataURL = containerURL?.appendingPathComponent("widget-data.json")
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static let shared = WidgetDataEncoder()
private init () {}
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@available(iOS 14, *)
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func encodeWidgetData() throws {
os_log(.debug, log: log, "Starting encoding widget data.")
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do {
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let unreadArticles = Array(try SmartFeedsController.shared.unreadFeed.fetchArticles()).sortedByDate(.orderedDescending)
let starredArticles = Array(try SmartFeedsController.shared.starredFeed.fetchArticles()).sortedByDate(.orderedDescending)
let todayArticles = Array(try SmartFeedsController.shared.todayFeed.fetchUnreadArticles()).sortedByDate(.orderedDescending)
var unread = [LatestArticle]()
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var today = [LatestArticle]()
var starred = [LatestArticle]()
for article in unreadArticles {
let latestArticle = LatestArticle(id: article.sortableArticleID,
feedTitle: article.sortableName,
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articleTitle: ArticleStringFormatter.truncatedTitle(article).isEmpty ? article.contentHTML?.strippingHTML().trimmingWhitespace : ArticleStringFormatter.truncatedTitle(article),
articleSummary: article.summary,
feedIcon: article.iconImage()?.image.dataRepresentation(),
pubDate: article.datePublished!.description)
unread.append(latestArticle)
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if unread.count == 7 { break }
}
for article in starredArticles {
let latestArticle = LatestArticle(id: article.sortableArticleID,
feedTitle: article.sortableName,
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articleTitle: ArticleStringFormatter.truncatedTitle(article).isEmpty ? article.contentHTML?.strippingHTML().trimmingWhitespace : ArticleStringFormatter.truncatedTitle(article),
articleSummary: article.summary,
feedIcon: article.iconImage()?.image.dataRepresentation(),
pubDate: article.datePublished!.description)
starred.append(latestArticle)
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if starred.count == 7 { break }
}
for article in todayArticles {
let latestArticle = LatestArticle(id: article.sortableArticleID,
feedTitle: article.sortableName,
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articleTitle: ArticleStringFormatter.truncatedTitle(article).isEmpty ? article.contentHTML?.strippingHTML().trimmingWhitespace : ArticleStringFormatter.truncatedTitle(article),
articleSummary: article.summary,
feedIcon: article.iconImage()?.image.dataRepresentation(),
pubDate: article.datePublished!.description)
today.append(latestArticle)
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if today.count == 7 { break }
}
let latestData = WidgetData(currentUnreadCount: SmartFeedsController.shared.unreadFeed.unreadCount,
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currentTodayCount: try! SmartFeedsController.shared.todayFeed.fetchUnreadArticles().count,
currentStarredCount: try! SmartFeedsController.shared.starredFeed.fetchArticles().count,
unreadArticles: unread,
starredArticles: starred,
todayArticles:today,
lastUpdateTime: Date())
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DispatchQueue.global().async { [weak self] in
guard let self = self else { return }
self.backgroundTaskID = UIApplication.shared.beginBackgroundTask (withName: "com.ranchero.NetNewsWire.Encode") {
UIApplication.shared.endBackgroundTask(self.backgroundTaskID!)
self.backgroundTaskID = .invalid
}
let encodedData = try? JSONEncoder().encode(latestData)
os_log(.debug, log: self.log, "Finished encoding widget data.")
if self.fileExists() {
try? FileManager.default.removeItem(at: self.dataURL!)
os_log(.debug, log: self.log, "Removed widget data from container.")
}
if FileManager.default.createFile(atPath: self.dataURL!.path, contents: encodedData, attributes: nil) {
os_log(.debug, log: self.log, "Wrote widget data to container.")
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WidgetCenter.shared.reloadAllTimelines()
UIApplication.shared.endBackgroundTask(self.backgroundTaskID!)
self.backgroundTaskID = .invalid
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} else {
UIApplication.shared.endBackgroundTask(self.backgroundTaskID!)
self.backgroundTaskID = .invalid
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}
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}
}
}
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private func fileExists() -> Bool {
FileManager.default.fileExists(atPath: dataURL!.path)
}
}