NetNewsWire/Frameworks/Account/CloudKit/CloudKitArticlesZoneDelegat...

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//
// CloudKitArticlesZoneDelegate.swift
// Account
//
// Created by Maurice Parker on 4/1/20.
// Copyright © 2020 Ranchero Software, LLC. All rights reserved.
//
import Foundation
import os.log
import RSParser
import RSWeb
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import CloudKit
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import SyncDatabase
import Articles
import ArticlesDatabase
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class CloudKitArticlesZoneDelegate: CloudKitZoneDelegate {
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private var log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "CloudKit")
weak var account: Account?
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var database: SyncDatabase
weak var articlesZone: CloudKitArticlesZone?
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init(account: Account, database: SyncDatabase, articlesZone: CloudKitArticlesZone) {
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self.account = account
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self.database = database
self.articlesZone = articlesZone
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}
func cloudKitDidModify(changed: [CKRecord], deleted: [CloudKitRecordKey], completion: @escaping (Result<Void, Error>) -> Void) {
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database.selectPendingReadStatusArticleIDs() { result in
switch result {
case .success(let pendingReadStatusArticleIDs):
self.database.selectPendingStarredStatusArticleIDs() { result in
switch result {
case .success(let pendingStarredStatusArticleIDs):
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self.delete(recordKeys: deleted, pendingStarredStatusArticleIDs: pendingStarredStatusArticleIDs) {
self.update(records: changed,
pendingReadStatusArticleIDs: pendingReadStatusArticleIDs,
pendingStarredStatusArticleIDs: pendingStarredStatusArticleIDs,
completion: completion)
}
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case .failure(let error):
os_log(.error, log: self.log, "Error occurred geting pending starred records: %@", error.localizedDescription)
completion(.failure(CloudKitZoneError.unknown))
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}
}
case .failure(let error):
os_log(.error, log: self.log, "Error occurred getting pending read status records: %@", error.localizedDescription)
completion(.failure(CloudKitZoneError.unknown))
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}
}
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}
}
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private extension CloudKitArticlesZoneDelegate {
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func delete(recordKeys: [CloudKitRecordKey], pendingStarredStatusArticleIDs: Set<String>, completion: @escaping () -> Void) {
let receivedRecordIDs = recordKeys.filter({ $0.recordType == CloudKitArticlesZone.CloudKitArticleStatus.recordType }).map({ $0.recordID })
let receivedArticleIDs = Set(receivedRecordIDs.map({ stripPrefix($0.externalID) }))
let deletableArticleIDs = receivedArticleIDs.subtracting(pendingStarredStatusArticleIDs)
guard !deletableArticleIDs.isEmpty else {
completion()
return
}
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database.deleteSelectedForProcessing(Array(deletableArticleIDs)) { _ in
self.account?.delete(articleIDs: deletableArticleIDs) { _ in
completion()
}
}
}
func update(records: [CKRecord], pendingReadStatusArticleIDs: Set<String>, pendingStarredStatusArticleIDs: Set<String>, completion: @escaping (Result<Void, Error>) -> Void) {
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let receivedUnreadArticleIDs = Set(records.filter({ $0[CloudKitArticlesZone.CloudKitArticleStatus.Fields.read] == "0" }).map({ stripPrefix($0.externalID) }))
let receivedReadArticleIDs = Set(records.filter({ $0[CloudKitArticlesZone.CloudKitArticleStatus.Fields.read] == "1" }).map({ stripPrefix($0.externalID) }))
let receivedUnstarredArticleIDs = Set(records.filter({ $0[CloudKitArticlesZone.CloudKitArticleStatus.Fields.starred] == "0" }).map({ stripPrefix($0.externalID) }))
let receivedStarredArticleIDs = Set(records.filter({ $0[CloudKitArticlesZone.CloudKitArticleStatus.Fields.starred] == "1" }).map({ stripPrefix($0.externalID) }))
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let updateableUnreadArticleIDs = receivedUnreadArticleIDs.subtracting(pendingReadStatusArticleIDs)
let updateableReadArticleIDs = receivedReadArticleIDs.subtracting(pendingReadStatusArticleIDs)
let updateableUnstarredArticleIDs = receivedUnstarredArticleIDs.subtracting(pendingStarredStatusArticleIDs)
let updateableStarredArticleIDs = receivedStarredArticleIDs.subtracting(pendingStarredStatusArticleIDs)
var errorOccurred = false
let group = DispatchGroup()
group.enter()
account?.markAsUnread(updateableUnreadArticleIDs) { result in
if case .failure(let databaseError) = result {
errorOccurred = true
os_log(.error, log: self.log, "Error occurred while storing unread statuses: %@", databaseError.localizedDescription)
}
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group.leave()
}
group.enter()
account?.markAsRead(updateableReadArticleIDs) { result in
if case .failure(let databaseError) = result {
errorOccurred = true
os_log(.error, log: self.log, "Error occurred while storing read statuses: %@", databaseError.localizedDescription)
}
group.leave()
}
group.enter()
account?.markAsUnstarred(updateableUnstarredArticleIDs) { result in
if case .failure(let databaseError) = result {
errorOccurred = true
os_log(.error, log: self.log, "Error occurred while storing unstarred statuses: %@", databaseError.localizedDescription)
}
group.leave()
}
group.enter()
account?.markAsStarred(updateableStarredArticleIDs) { result in
if case .failure(let databaseError) = result {
errorOccurred = true
os_log(.error, log: self.log, "Error occurred while storing starred statuses: %@", databaseError.localizedDescription)
}
group.leave()
}
let parsedItems = records.compactMap { makeParsedItem($0) }
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let webFeedIDsAndItems = Dictionary(grouping: parsedItems, by: { item in item.feedURL } ).mapValues { Set($0) }
for (webFeedID, parsedItems) in webFeedIDsAndItems {
group.enter()
self.account?.update(webFeedID, with: parsedItems, deleteOlder: false) { result in
switch result {
case .success(let articleChanges):
guard let deletes = articleChanges.deletedArticles, !deletes.isEmpty else {
group.leave()
return
}
let syncStatuses = deletes.map { SyncStatus(articleID: $0.articleID, key: .deleted, flag: true) }
try? self.database.insertStatuses(syncStatuses)
group.leave()
case .failure(let databaseError):
errorOccurred = true
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os_log(.error, log: self.log, "Error occurred while storing articles: %@", databaseError.localizedDescription)
group.leave()
}
}
}
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group.notify(queue: DispatchQueue.main) {
if errorOccurred {
completion(.failure(CloudKitZoneError.unknown))
} else {
completion(.success(()))
}
}
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}
func stripPrefix(_ externalID: String) -> String {
return String(externalID[externalID.index(externalID.startIndex, offsetBy: 2)..<externalID.endIndex])
}
func makeParsedItem(_ articleRecord: CKRecord) -> ParsedItem? {
guard articleRecord.recordType == CloudKitArticlesZone.CloudKitArticle.recordType else {
return nil
}
var parsedAuthors = Set<ParsedAuthor>()
let decoder = JSONDecoder()
if let encodedParsedAuthors = articleRecord[CloudKitArticlesZone.CloudKitArticle.Fields.parsedAuthors] as? [String] {
for encodedParsedAuthor in encodedParsedAuthors {
if let data = encodedParsedAuthor.data(using: .utf8), let parsedAuthor = try? decoder.decode(ParsedAuthor.self, from: data) {
parsedAuthors.insert(parsedAuthor)
}
}
}
guard let uniqueID = articleRecord[CloudKitArticlesZone.CloudKitArticle.Fields.uniqueID] as? String,
let webFeedURL = articleRecord[CloudKitArticlesZone.CloudKitArticle.Fields.webFeedURL] as? String else {
return nil
}
let parsedItem = ParsedItem(syncServiceID: nil,
uniqueID: uniqueID,
feedURL: webFeedURL,
url: articleRecord[CloudKitArticlesZone.CloudKitArticle.Fields.url] as? String,
externalURL: articleRecord[CloudKitArticlesZone.CloudKitArticle.Fields.externalURL] as? String,
title: articleRecord[CloudKitArticlesZone.CloudKitArticle.Fields.title] as? String,
language: nil,
contentHTML: articleRecord[CloudKitArticlesZone.CloudKitArticle.Fields.contentHTML] as? String,
contentText: articleRecord[CloudKitArticlesZone.CloudKitArticle.Fields.contentText] as? String,
summary: articleRecord[CloudKitArticlesZone.CloudKitArticle.Fields.summary] as? String,
imageURL: articleRecord[CloudKitArticlesZone.CloudKitArticle.Fields.imageURL] as? String,
bannerImageURL: articleRecord[CloudKitArticlesZone.CloudKitArticle.Fields.imageURL] as? String,
datePublished: articleRecord[CloudKitArticlesZone.CloudKitArticle.Fields.datePublished] as? Date,
dateModified: articleRecord[CloudKitArticlesZone.CloudKitArticle.Fields.dateModified] as? Date,
authors: parsedAuthors,
tags: nil,
attachments: nil)
return parsedItem
}
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}