98 lines
3.1 KiB
Swift
98 lines
3.1 KiB
Swift
//
|
|
// FeedlyCreateFeedsForCollectionFoldersOperation.swift
|
|
// Account
|
|
//
|
|
// Created by Kiel Gillard on 20/9/19.
|
|
// Copyright © 2019 Ranchero Software, LLC. All rights reserved.
|
|
//
|
|
|
|
import Foundation
|
|
import os.log
|
|
|
|
/// Single responsibility is to accurately reflect Collections and their Feeds as Folders and their Feeds.
|
|
final class FeedlyCreateFeedsForCollectionFoldersOperation: FeedlyOperation {
|
|
|
|
let account: Account
|
|
let feedsAndFoldersProvider: FeedlyFeedsAndFoldersProviding
|
|
let log: OSLog
|
|
|
|
init(account: Account, feedsAndFoldersProvider: FeedlyFeedsAndFoldersProviding, log: OSLog) {
|
|
self.feedsAndFoldersProvider = feedsAndFoldersProvider
|
|
self.account = account
|
|
self.log = log
|
|
}
|
|
|
|
override func main() {
|
|
defer { didFinish() }
|
|
|
|
guard !isCancelled else { return }
|
|
|
|
let pairs = feedsAndFoldersProvider.feedsAndFolders
|
|
|
|
let feedsBefore = Set(pairs
|
|
.map { $0.1 }
|
|
.flatMap { $0.topLevelWebFeeds })
|
|
|
|
// Remove feeds in a folder which are not in the corresponding collection.
|
|
for (collectionFeeds, folder) in pairs {
|
|
let feedsInFolder = folder.topLevelWebFeeds
|
|
let feedsInCollection = Set(collectionFeeds.map { $0.id })
|
|
let feedsToRemove = feedsInFolder.filter { !feedsInCollection.contains($0.webFeedID) }
|
|
if !feedsToRemove.isEmpty {
|
|
folder.removeFeeds(feedsToRemove)
|
|
// os_log(.debug, log: log, "\"%@\" - removed: %@", collection.label, feedsToRemove.map { $0.feedID }, feedsInCollection)
|
|
}
|
|
|
|
}
|
|
|
|
// Pair each Feed with its Folder.
|
|
var feedsAdded = Set<WebFeed>()
|
|
|
|
let feedsAndFolders = pairs
|
|
.map({ (collectionFeeds, folder) -> [(FeedlyFeed, Folder)] in
|
|
return collectionFeeds.map { feed -> (FeedlyFeed, Folder) in
|
|
return (feed, folder) // pairs a folder for every feed in parallel
|
|
}
|
|
})
|
|
.flatMap { $0 }
|
|
.compactMap { (collectionFeed, folder) -> (WebFeed, Folder) in
|
|
|
|
// find an existing feed previously added to the account
|
|
if let feed = account.existingWebFeed(withWebFeedID: collectionFeed.id) {
|
|
return (feed, folder)
|
|
} else {
|
|
// find an existing feed we created below in an earlier value
|
|
for feed in feedsAdded where feed.webFeedID == collectionFeed.id {
|
|
return (feed, folder)
|
|
}
|
|
}
|
|
|
|
// no exsiting feed, create a new one
|
|
let id = collectionFeed.id
|
|
let url = FeedlyFeedResourceId(id: id).url
|
|
let feed = account.createWebFeed(with: collectionFeed.title, url: url, webFeedID: id, homePageURL: collectionFeed.website)
|
|
|
|
// So the same feed isn't created more than once.
|
|
feedsAdded.insert(feed)
|
|
|
|
return (feed, folder)
|
|
}
|
|
|
|
os_log(.debug, log: log, "Processing %i feeds.", feedsAndFolders.count)
|
|
feedsAndFolders.forEach { (feed, folder) in
|
|
if !folder.has(feed) {
|
|
folder.addWebFeed(feed)
|
|
}
|
|
}
|
|
|
|
// Remove feeds without folders/collections.
|
|
let feedsAfter = Set(feedsAndFolders.map { $0.0 })
|
|
let feedsWithoutCollections = feedsBefore.subtracting(feedsAfter)
|
|
account.removeFeeds(feedsWithoutCollections)
|
|
|
|
if !feedsWithoutCollections.isEmpty {
|
|
os_log(.debug, log: log, "Removed %i feeds", feedsWithoutCollections.count)
|
|
}
|
|
}
|
|
}
|