67 lines
1.6 KiB
Swift
67 lines
1.6 KiB
Swift
//
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// OPMLNormalizer.swift
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// Account
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//
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// Created by Maurice Parker on 3/31/20.
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// Copyright © 2020 Ranchero Software, LLC. All rights reserved.
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//
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import Foundation
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import Parser
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final class OPMLNormalizer {
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var normalizedOPMLItems = [RSOPMLItem]()
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static func normalize(_ items: [RSOPMLItem]) -> [RSOPMLItem] {
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let opmlNormalizer = OPMLNormalizer()
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opmlNormalizer.normalize(items)
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return opmlNormalizer.normalizedOPMLItems
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}
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private func normalize(_ items: [RSOPMLItem], parentFolder: RSOPMLItem? = nil) {
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var feedsToAdd = [RSOPMLItem]()
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for item in items {
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if let _ = item.feedSpecifier {
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if !feedsToAdd.contains(where: { $0.feedSpecifier?.feedURL == item.feedSpecifier?.feedURL }) {
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feedsToAdd.append(item)
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}
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continue
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}
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guard let _ = item.titleFromAttributes else {
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// Folder doesn’t have a name, so it won’t be created, and its items will go one level up.
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if let itemChildren = item.children {
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normalize(itemChildren, parentFolder: parentFolder)
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}
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continue
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}
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feedsToAdd.append(item)
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if let itemChildren = item.children {
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if let parentFolder = parentFolder {
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normalize(itemChildren, parentFolder: parentFolder)
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} else {
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normalize(itemChildren, parentFolder: item)
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}
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}
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}
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if let parentFolder = parentFolder {
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for feed in feedsToAdd {
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if !(parentFolder.children?.contains(where: { $0.feedSpecifier?.feedURL == feed.feedSpecifier?.feedURL}) ?? false) {
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parentFolder.addChild(feed)
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}
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}
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} else {
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for feed in feedsToAdd {
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normalizedOPMLItems.append(feed)
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}
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}
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}
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}
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