70 lines
2.2 KiB
Swift
70 lines
2.2 KiB
Swift
//
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// FeedlyMirrorCollectionsAsFoldersOperation.swift
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// Account
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//
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// Created by Kiel Gillard on 20/9/19.
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// Copyright © 2019 Ranchero Software, LLC. All rights reserved.
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//
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import Foundation
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import os.log
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protocol FeedlyCollectionsAndFoldersProviding: class {
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var collectionsAndFolders: [(FeedlyCollection, Folder)] { get }
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}
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protocol FeedlyFeedsAndFoldersProviding {
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var feedsAndFolders: [([FeedlyFeed], Folder)] { get }
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}
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/// Single responsibility is accurately reflect Collections from Feedly as Folders.
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final class FeedlyMirrorCollectionsAsFoldersOperation: FeedlyOperation, FeedlyCollectionsAndFoldersProviding, FeedlyFeedsAndFoldersProviding {
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let account: Account
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let collectionsProvider: FeedlyCollectionProviding
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let log: OSLog
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private(set) var collectionsAndFolders = [(FeedlyCollection, Folder)]()
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private(set) var feedsAndFolders = [([FeedlyFeed], Folder)]()
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init(account: Account, collectionsProvider: FeedlyCollectionProviding, log: OSLog) {
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self.collectionsProvider = collectionsProvider
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self.account = account
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self.log = log
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}
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override func main() {
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defer { didFinish() }
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guard !isCancelled else { return }
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let localFolders = account.folders ?? Set()
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let collections = collectionsProvider.collections
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let pairs = collections.compactMap { collection -> (FeedlyCollection, Folder)? in
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guard let folder = account.ensureFolder(with: collection.label) else {
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assertionFailure("Why wasn't a folder created?")
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return nil
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}
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folder.externalID = collection.id
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return (collection, folder)
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}
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collectionsAndFolders = pairs
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os_log(.debug, log: log, "Ensured %i folders for %i collections.", pairs.count, collections.count)
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feedsAndFolders = pairs.map { (collection, folder) -> (([FeedlyFeed], Folder)) in
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return (collection.feeds, folder)
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}
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// Remove folders without a corresponding collection
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let collectionFolders = Set(pairs.map { $0.1 })
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let foldersWithoutCollections = localFolders.subtracting(collectionFolders)
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for unmatched in foldersWithoutCollections {
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account.removeFolder(unmatched)
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}
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os_log(.debug, log: log, "Removed %i folders: %@", foldersWithoutCollections.count, foldersWithoutCollections.map { $0.externalID ?? $0.nameForDisplay })
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}
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}
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