Add the ability to import NNW 3 Subscription plist files. Issue #1129

Mac/AppDelegate.swift

@@ -57,6 +57,7 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserInterfaceValidations,
 	private var addFeedController: AddFeedController?
 	private var addFolderWindowController: AddFolderWindowController?
 	private var importOPMLController: ImportOPMLWindowController?
+	private var importNNW3Controller: ImportNNW3WindowController?
 	private var exportOPMLController: ExportOPMLWindowController?
 	private var keyboardShortcutsWindowController: WebViewWindowController?
 	private var inspectorWindowController: InspectorWindowController?
@@ -126,6 +127,7 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserInterfaceValidations,
 			logDebugMessage("Is first run.")
 		}
 		let localAccount = AccountManager.shared.defaultAccount
+		NNW3FeedsImporter.importIfNeeded(isFirstRun, account: localAccount)
 		DefaultFeedsImporter.importIfNeeded(isFirstRun, account: localAccount)
 
 		let tempDirectory = NSTemporaryDirectory()
@@ -395,7 +397,6 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserInterfaceValidations,
 	}
 
 	@IBAction func toggleInspectorWindow(_ sender: Any?) {
-
 		if inspectorWindowController == nil {
 			inspectorWindowController = (windowControllerWithName("Inspector") as! InspectorWindowController)
 		}
@@ -410,7 +411,6 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserInterfaceValidations,
 	}
 
 	@IBAction func importOPMLFromFile(_ sender: Any?) {
-
 		createAndShowMainWindow()
 		if mainWindowController!.isDisplayingSheet {
 			return
@@ -418,11 +418,19 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserInterfaceValidations,
 		
 		importOPMLController = ImportOPMLWindowController()
 		importOPMLController?.runSheetOnWindow(mainWindowController!.window!)
+	}
 	
+	@IBAction func importNNW3FromFile(_ sender: Any?) {
+		createAndShowMainWindow()
+		if mainWindowController!.isDisplayingSheet {
+			return
+		}
+		
+		importNNW3Controller = ImportNNW3WindowController()
+		importNNW3Controller?.runSheetOnWindow(mainWindowController!.window!)
 	}
 	
 	@IBAction func exportOPML(_ sender: Any?) {
-
 		createAndShowMainWindow()
 		if mainWindowController!.isDisplayingSheet {
 			return
@@ -430,11 +438,9 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserInterfaceValidations,
 		
 		exportOPMLController = ExportOPMLWindowController()
 		exportOPMLController?.runSheetOnWindow(mainWindowController!.window!)
-		
 	}
 	
 	@IBAction func addAppNews(_ sender: Any?) {
-
 		if AccountManager.shared.anyAccountHasFeedWithURL(appNewsURLString) {
 			return
 		}

Mac/Base.lproj/Main.storyboard

@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="14490.70" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
+<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="15504" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="14490.70"/>
+        <deployment identifier="macosx"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="15504"/>
     </dependencies>
     <scenes>
         <!--Application-->
@@ -91,6 +92,12 @@
                                                 <action selector="importOPMLFromFile:" target="Ady-hI-5gd" id="eGY-fm-uvK"/>
                                             </connections>
                                         </menuItem>
+                                        <menuItem title="Import NNW 3 Subscriptions ..." id="ely-yi-STg">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="importNNW3FromFile:" target="Voe-Tx-rLC" id="mu3-gN-7uA"/>
+                                            </connections>
+                                        </menuItem>
                                         <menuItem title="Export Subscriptions…" keyEquivalent="e" id="Xy2-v8-Lj8">
                                             <modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
                                             <connections>

Mac/MainWindow/NNW3/ImportNNW3Sheet.xib

@@ -0,0 +1,104 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="15504" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
+    <dependencies>
+        <deployment identifier="macosx"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="15504"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <objects>
+        <customObject id="-2" userLabel="File's Owner" customClass="ImportNNW3WindowController" customModule="NetNewsWire" customModuleProvider="target">
+            <connections>
+                <outlet property="accountPopUpButton" destination="sEU-ot-DE2" id="9W3-o6-YsH"/>
+                <outlet property="window" destination="QvC-M9-y7g" id="KF3-y6-Xy7"/>
+            </connections>
+        </customObject>
+        <customObject id="-1" userLabel="First Responder" customClass="FirstResponder"/>
+        <customObject id="-3" userLabel="Application" customClass="NSObject"/>
+        <window title="Window" allowsToolTipsWhenApplicationIsInactive="NO" autorecalculatesKeyViewLoop="NO" restorable="NO" releasedWhenClosed="NO" visibleAtLaunch="NO" animationBehavior="default" id="QvC-M9-y7g">
+            <windowStyleMask key="styleMask" titled="YES"/>
+            <windowPositionMask key="initialPositionMask" leftStrut="YES" rightStrut="YES" topStrut="YES" bottomStrut="YES"/>
+            <rect key="contentRect" x="196" y="240" width="433" height="183"/>
+            <rect key="screenRect" x="0.0" y="0.0" width="2560" height="1417"/>
+            <view key="contentView" wantsLayer="YES" misplaced="YES" id="EiT-Mj-1SZ">
+                <rect key="frame" x="0.0" y="0.0" width="433" height="183"/>
+                <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                <subviews>
+                    <textField verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" translatesAutoresizingMaskIntoConstraints="NO" id="vE6-sv-BA0">
+                        <rect key="frame" x="18" y="100" width="405" height="32"/>
+                        <textFieldCell key="cell" selectable="YES" title="Choose the account to get the imported subscriptions. This requires a NetNewsWire 3 Subscriptions.plist file." id="1Vu-Te-PGl">
+                            <font key="font" metaFont="system"/>
+                            <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
+                            <color key="backgroundColor" name="textBackgroundColor" catalog="System" colorSpace="catalog"/>
+                        </textFieldCell>
+                    </textField>
+                    <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="kZ4-y9-lYy">
+                        <rect key="frame" x="18" y="64" width="63" height="16"/>
+                        <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" alignment="right" title="Account:" id="e9g-7H-VWa">
+                            <font key="font" metaFont="systemBold"/>
+                            <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
+                            <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
+                        </textFieldCell>
+                    </textField>
+                    <popUpButton verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="sEU-ot-DE2" userLabel="Account Popup">
+                        <rect key="frame" x="85" y="58" width="339" height="25"/>
+                        <popUpButtonCell key="cell" type="push" title="Item 1" bezelStyle="rounded" alignment="left" lineBreakMode="truncatingTail" state="on" borderStyle="borderAndBezel" imageScaling="proportionallyDown" inset="2" selectedItem="xsd-12-2yb" id="NuO-Hk-nk3">
+                            <behavior key="behavior" lightByBackground="YES" lightByGray="YES"/>
+                            <font key="font" metaFont="system"/>
+                            <menu key="menu" id="8LY-np-ij1">
+                                <items>
+                                    <menuItem title="Item 1" state="on" id="xsd-12-2yb"/>
+                                    <menuItem title="Item 2" id="JGa-5R-SV5"/>
+                                    <menuItem title="Item 3" id="92e-hX-kYj"/>
+                                </items>
+                            </menu>
+                        </popUpButtonCell>
+                    </popUpButton>
+                    <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="ceu-mM-EKm">
+                        <rect key="frame" x="81" y="13" width="173" height="32"/>
+                        <buttonCell key="cell" type="push" title="Cancel" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="9ab-cB-hex">
+                            <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
+                            <font key="font" metaFont="system"/>
+                            <string key="keyEquivalent" base64-UTF8="YES">
+Gw
+</string>
+                        </buttonCell>
+                        <connections>
+                            <action selector="cancel:" target="-2" id="TTV-OR-P3d"/>
+                        </connections>
+                    </button>
+                    <button horizontalHuggingPriority="750" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="et6-I1-6wB">
+                        <rect key="frame" x="254" y="13" width="173" height="32"/>
+                        <buttonCell key="cell" type="push" title="Import from NNW 3 …" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="dhV-on-ayM">
+                            <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
+                            <font key="font" metaFont="system"/>
+                            <string key="keyEquivalent" base64-UTF8="YES">
+DQ
+</string>
+                        </buttonCell>
+                        <connections>
+                            <action selector="importNNW3:" target="-2" id="C33-8m-XQA"/>
+                        </connections>
+                    </button>
+                </subviews>
+                <constraints>
+                    <constraint firstAttribute="trailing" secondItem="vE6-sv-BA0" secondAttribute="trailing" constant="20" symbolic="YES" id="2UM-dU-XgH"/>
+                    <constraint firstItem="kZ4-y9-lYy" firstAttribute="top" secondItem="vE6-sv-BA0" secondAttribute="bottom" constant="20" id="8Wf-Iv-teA"/>
+                    <constraint firstItem="sEU-ot-DE2" firstAttribute="firstBaseline" secondItem="kZ4-y9-lYy" secondAttribute="firstBaseline" id="EPd-vD-8pa"/>
+                    <constraint firstItem="et6-I1-6wB" firstAttribute="width" secondItem="ceu-mM-EKm" secondAttribute="width" id="Ldw-C8-F5X"/>
+                    <constraint firstItem="vE6-sv-BA0" firstAttribute="leading" secondItem="EiT-Mj-1SZ" secondAttribute="leading" constant="20" symbolic="YES" id="M8o-2f-uax"/>
+                    <constraint firstItem="et6-I1-6wB" firstAttribute="top" secondItem="sEU-ot-DE2" secondAttribute="bottom" constant="20" symbolic="YES" id="OXm-Ns-r9Z"/>
+                    <constraint firstItem="kZ4-y9-lYy" firstAttribute="leading" secondItem="EiT-Mj-1SZ" secondAttribute="leading" constant="20" symbolic="YES" id="SZo-1P-yYA"/>
+                    <constraint firstAttribute="bottom" secondItem="et6-I1-6wB" secondAttribute="bottom" constant="20" symbolic="YES" id="T9O-XC-wdY"/>
+                    <constraint firstItem="et6-I1-6wB" firstAttribute="leading" secondItem="ceu-mM-EKm" secondAttribute="trailing" constant="12" symbolic="YES" id="Y8m-P8-JQh"/>
+                    <constraint firstItem="sEU-ot-DE2" firstAttribute="leading" secondItem="kZ4-y9-lYy" secondAttribute="trailing" constant="8" symbolic="YES" id="a0f-Ak-Zdq"/>
+                    <constraint firstAttribute="trailing" secondItem="et6-I1-6wB" secondAttribute="trailing" constant="20" symbolic="YES" id="chg-8b-D51"/>
+                    <constraint firstItem="ceu-mM-EKm" firstAttribute="centerY" secondItem="et6-I1-6wB" secondAttribute="centerY" id="eKt-vM-3wn"/>
+                    <constraint firstItem="ceu-mM-EKm" firstAttribute="leading" secondItem="sEU-ot-DE2" secondAttribute="leading" id="gb5-bZ-0R6"/>
+                    <constraint firstItem="vE6-sv-BA0" firstAttribute="top" secondItem="EiT-Mj-1SZ" secondAttribute="top" constant="20" symbolic="YES" id="ggA-m1-5pj"/>
+                    <constraint firstAttribute="trailing" secondItem="sEU-ot-DE2" secondAttribute="trailing" constant="20" symbolic="YES" id="sFO-00-DR0"/>
+                </constraints>
+            </view>
+            <point key="canvasLocation" x="99.5" y="103.5"/>
+        </window>
+    </objects>
+</document>

Mac/MainWindow/NNW3/ImportNNW3WindowController.swift

@@ -0,0 +1,110 @@
+//
+//  ImportNNW3WindowController.swift
+//  NetNewsWire
+//
+//  Created by Maurice Parker on 10/14/19.
+//  Copyright © 2019 Ranchero Software. All rights reserved.
+//
+
+import AppKit
+import Account
+
+class ImportNNW3WindowController: NSWindowController {
+
+	@IBOutlet weak var accountPopUpButton: NSPopUpButton!
+	private weak var hostWindow: NSWindow?
+	
+	convenience init() {
+		self.init(windowNibName: NSNib.Name("ImportNNW3Sheet"))
+	}
+	
+	override func windowDidLoad() {
+		accountPopUpButton.removeAllItems()
+		
+		let menu = NSMenu()
+		accountPopUpButton.menu = menu
+
+		for oneAccount in AccountManager.shared.sortedActiveAccounts {
+			
+			let oneMenuItem = NSMenuItem()
+			oneMenuItem.title = oneAccount.nameForDisplay
+			oneMenuItem.representedObject = oneAccount
+			menu.addItem(oneMenuItem)
+			
+			if oneAccount.accountID == AppDefaults.importOPMLAccountID {
+				accountPopUpButton.select(oneMenuItem)
+			}
+			
+		}
+	}
+	
+	// MARK: API
+	
+	func runSheetOnWindow(_ hostWindow: NSWindow) {
+		
+		self.hostWindow = hostWindow
+		
+		if AccountManager.shared.activeAccounts.count == 1 {
+			let account = AccountManager.shared.activeAccounts.first!
+			importNNW3(account: account)
+		} else {
+			hostWindow.beginSheet(window!)
+		}
+		
+	}
+	
+	// MARK: Actions
+	
+	@IBAction func cancel(_ sender: Any) {
+		hostWindow!.endSheet(window!, returnCode: NSApplication.ModalResponse.cancel)
+	}
+	
+	@IBAction func importNNW3(_ sender: Any) {
+
+		guard let menuItem = accountPopUpButton.selectedItem else {
+			return
+		}
+		
+		let account = menuItem.representedObject as! Account
+		AppDefaults.importOPMLAccountID = account.accountID
+		hostWindow!.endSheet(window!, returnCode: NSApplication.ModalResponse.OK)
+		importNNW3(account: account)
+		
+	}
+	
+	func importNNW3(account: Account) {
+		
+		let panel = NSOpenPanel()
+		panel.canDownloadUbiquitousContents = true
+		panel.canResolveUbiquitousConflicts = true
+		panel.canChooseFiles = true
+		panel.allowsMultipleSelection = false
+		panel.canChooseDirectories = false
+		panel.resolvesAliases = true
+		panel.directoryURL = URL(fileURLWithPath: NNW3PlistConverter.defaultFilePath)
+		panel.allowedFileTypes = ["plist"]
+		panel.allowsOtherFileTypes = false
+		
+		panel.beginSheetModal(for: hostWindow!) { modalResult in
+			if modalResult == NSApplication.ModalResponse.OK, let url = panel.url {
+				
+				guard let opmlURL = NNW3PlistConverter.convertToOPML(url: url) else {
+					return
+				}
+				
+				account.importOPML(opmlURL) { result in
+					try? FileManager.default.removeItem(at: opmlURL)
+					switch result {
+					case .success:
+						break
+					case .failure(let error):
+						NSApplication.shared.presentError(error)
+					}
+				}
+				
+			}
+		}
+		
+	}
+
+}

Mac/MainWindow/NNW3/NNW3Document.swift

@@ -0,0 +1,53 @@
+//
+//  NNW3Document.swift
+//  NetNewsWire
+//
+//  Created by Maurice Parker on 10/14/19.
+//  Copyright © 2019 Ranchero Software. All rights reserved.
+//
+
+import Foundation
+
+class NNW3Document: NNW3Entry {
+	
+	init(plist: [[String: Any]]) {
+		super.init(title: "NNW3")
+		
+		for child in plist {
+			if child["isContainer"] as? Bool ?? false {
+				entries.append(NNW3Entry(plist: child, parent: self))
+			} else {
+				entries.append(NNW3Feed(plist: child, parent: self))
+			}
+		}
+		
+	}
+	
+	override func makeXML(indentLevel: Int) -> String {
+		
+		var s =
+		"""
+		<?xml version="1.0" encoding="UTF-8"?>
+		<opml version="1.1">
+		<head>
+		<title>\(title ?? "")</title>
+		</head>
+		<body>
+		
+		"""
+		
+		for entry in entries {
+			s += entry.makeXML(indentLevel: indentLevel + 1)
+		}
+
+		s +=
+		"""
+			</body>
+			</opml>
+			"""
+		
+		return s
+		
+	}
+	
+}

Mac/MainWindow/NNW3/NNW3Entry.swift

@@ -0,0 +1,61 @@
+//
+//  NNW3Entry.swift
+//  NetNewsWire
+//
+//  Created by Maurice Parker on 10/14/19.
+//  Copyright © 2019 Ranchero Software. All rights reserved.
+//
+
+import Foundation
+import RSCore
+
+class NNW3Entry {
+	
+	var title: String?
+	var entries = [NNW3Entry]()
+
+	weak var parent: NNW3Entry?
+	
+	var isFolder: Bool {
+		return type(of: self) == NNW3Entry.self
+	}
+	
+	init(title: String?, parent: NNW3Entry? = nil) {
+		self.title = title
+		self.parent = parent
+	}
+	
+	convenience init(plist: [String: Any], parent: NNW3Entry? = nil) {
+		let title = plist["name"] as? String
+		self.init(title: title, parent: parent)
+		
+		guard let childrenArray =  plist["childrenArray"] as? [[String: AnyObject]] else {
+			return
+		}
+		
+		for child in childrenArray {
+			if child["isContainer"] as? Bool ?? false {
+				entries.append(NNW3Entry(plist: child, parent: self))
+			} else {
+				entries.append(NNW3Feed(plist: child, parent: self))
+			}
+		}
+		
+	}
+	
+	func makeXML(indentLevel: Int) -> String {
+		
+		let t = title?.rs_stringByEscapingSpecialXMLCharacters() ?? ""
+		var s = "<outline text=\"\(t)\" title=\"\(t)\">\n".rs_string(byPrependingNumberOfTabs: indentLevel)
+
+		for entry in entries {
+			s += entry.makeXML(indentLevel: indentLevel + 1)
+		}
+		
+		s += "</outline>\n".rs_string(byPrependingNumberOfTabs: indentLevel)
+
+		return s
+		
+	}
+		
+}

Mac/MainWindow/NNW3/NNW3Feed.swift

@@ -0,0 +1,48 @@
+//
+//  NNW3Feed.swift
+//  NetNewsWire
+//
+//  Created by Maurice Parker on 10/14/19.
+//  Copyright © 2019 Ranchero Software. All rights reserved.
+//
+
+import Foundation
+import RSCore
+
+class NNW3Feed: NNW3Entry {
+
+	var pageURL: String?
+	var feedURL: String?
+	
+	init(feedURL: String) {
+		super.init(title: nil)
+		self.feedURL = feedURL
+	}
+	
+	init(title: String?, pageURL: String?, feedURL: String?, parent: NNW3Entry? = nil) {
+		super.init(title: title, parent: parent)
+		self.pageURL = pageURL
+		self.feedURL = feedURL
+	}
+
+	convenience init(plist: [String: Any], parent: NNW3Entry? = nil) {
+		let title = plist["name"] as? String
+		let pageURL = plist["home"] as? String
+		let feedURL = plist["rss"] as? String
+		self.init(title: title, pageURL: pageURL, feedURL: feedURL, parent: parent)
+	}
+	
+	override func makeXML(indentLevel: Int) -> String {
+		
+		let t = title?.rs_stringByEscapingSpecialXMLCharacters() ?? ""
+		let p = pageURL?.rs_stringByEscapingSpecialXMLCharacters() ?? ""
+		let f = feedURL?.rs_stringByEscapingSpecialXMLCharacters() ?? ""
+		
+		var s = "<outline text=\"\(t)\" title=\"\(t)\" description=\"\" type=\"rss\" version=\"RSS\" htmlUrl=\"\(p)\" xmlUrl=\"\(f)\"/>\n"
+		s = s.rs_string(byPrependingNumberOfTabs: indentLevel)
+		
+		return s
+		
+	}
+	
+}

Mac/MainWindow/NNW3/NNW3FeedsImporter.swift

@@ -0,0 +1,50 @@
+//
+//  NNW3FeedsImporter.swift
+//  NetNewsWire
+//
+//  Created by Maurice Parker on 10/14/19.
+//  Copyright © 2019 Ranchero Software. All rights reserved.
+//
+
+import Foundation
+import Account
+import RSCore
+
+struct NNW3FeedsImporter {
+	
+	static func importIfNeeded(_ isFirstRun: Bool, account: Account) {
+		guard shouldImportDefaultFeeds(isFirstRun) else {
+			return
+		}
+
+		if !FileManager.default.fileExists(atPath: NNW3PlistConverter.defaultFilePath) {
+			return
+		}
+		
+		appDelegate.logDebugMessage("Importing NNW3 feeds.")
+		
+		let url = URL(fileURLWithPath: NNW3PlistConverter.defaultFilePath)
+		guard let opmlURL = NNW3PlistConverter.convertToOPML(url: url) else {
+			return
+		}
+		
+		account.importOPML(opmlURL) { result in
+			try? FileManager.default.removeItem(at: opmlURL)
+			switch result {
+			case .success:
+				appDelegate.logDebugMessage("Importing NNW3 feeds succeeded.")
+			case .failure(let error):
+				appDelegate.logDebugMessage("Importing NNW3 feeds failed.  \(error.localizedDescription)")
+			}
+		}
+
+	}
+
+	private static func shouldImportDefaultFeeds(_ isFirstRun: Bool) -> Bool {
+		if !isFirstRun || AccountManager.shared.anyAccountHasAtLeastOneFeed() {
+			return false
+		}
+		return true
+	}
+	
+}

Mac/MainWindow/NNW3/NNW3PlistConverter.swift

@@ -0,0 +1,39 @@
+//
+//  NNW3Importer.swift
+//  NetNewsWire
+//
+//  Created by Maurice Parker on 10/14/19.
+//  Copyright © 2019 Ranchero Software. All rights reserved.
+//
+
+import Foundation
+
+class NNW3PlistConverter {
+	
+	static var defaultFilePath: String {
+		return ("~/Library/Application Support/NetNewsWire/Subscriptions.plist" as NSString).expandingTildeInPath
+	}
+	
+	static func convertToOPML(url: URL) -> URL? {
+		guard let data = try? Data(contentsOf: url) else {
+			return nil
+		}
+		
+		guard let nnw3plist = try? PropertyListSerialization.propertyList(from: data, options: [], format: nil) as? [[String: AnyObject]] else {
+			return nil
+		}
+
+		let opmlURL = FileManager.default.temporaryDirectory.appendingPathComponent("NNW3.opml")
+		let doc = NNW3Document(plist: nnw3plist)
+		let opml = doc.makeXML(indentLevel: 0)
+		do {
+			try opml.write(to: opmlURL, atomically: true, encoding: .utf8)
+		} catch let error as NSError {
+			NSApplication.shared.presentError(error)
+			return nil
+		}
+
+		return opmlURL
+	}
+
+}

NetNewsWire.xcodeproj/project.pbxproj

@@ -35,6 +35,8 @@
 		51554C25228B71910055115A /* SyncDatabase.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 51554C01228B6EB50055115A /* SyncDatabase.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
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+		5186515E23552F040078E021 /* NNW3Feed.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5186515B23552F040078E021 /* NNW3Feed.swift */; };
+		5186515F23552F040078E021 /* NNW3Document.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5186515C23552F040078E021 /* NNW3Document.swift */; };
+		5186516023552F040078E021 /* NNW3Entry.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5186515D23552F040078E021 /* NNW3Entry.swift */; };
+		51865167235556240078E021 /* NNW3FeedsImporter.swift in Sources */ = {isa = PBXBuildFile; fileRef = 51865166235556240078E021 /* NNW3FeedsImporter.swift */; };
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@@ -690,6 +697,8 @@
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+		516CAC42235521070038D354 /* ImportNNW3Sheet.xib */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = file.xib; path = ImportNNW3Sheet.xib; sourceTree = "<group>"; };
+		516CAC4B235521070038D354 /* ImportNNW3WindowController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ImportNNW3WindowController.swift; sourceTree = "<group>"; };
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@@ -699,6 +708,11 @@
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 		5183CCEE227125970010922C /* SettingsViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SettingsViewController.swift; sourceTree = "<group>"; };
+		5186515123552E610078E021 /* NNW3PlistConverter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NNW3PlistConverter.swift; sourceTree = "<group>"; };
+		5186515B23552F040078E021 /* NNW3Feed.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = NNW3Feed.swift; sourceTree = "<group>"; };
+		5186515C23552F040078E021 /* NNW3Document.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = NNW3Document.swift; sourceTree = "<group>"; };
+		5186515D23552F040078E021 /* NNW3Entry.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = NNW3Entry.swift; sourceTree = "<group>"; };
+		51865166235556240078E021 /* NNW3FeedsImporter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NNW3FeedsImporter.swift; sourceTree = "<group>"; };
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@@ -1041,6 +1055,20 @@
 			name = Products;
 			sourceTree = "<group>";
 		};
+		516CAC53235529180038D354 /* NNW3 */ = {
+			isa = PBXGroup;
+			children = (
+				516CAC42235521070038D354 /* ImportNNW3Sheet.xib */,
+				516CAC4B235521070038D354 /* ImportNNW3WindowController.swift */,
+				51865166235556240078E021 /* NNW3FeedsImporter.swift */,
+				5186515123552E610078E021 /* NNW3PlistConverter.swift */,
+				5186515C23552F040078E021 /* NNW3Document.swift */,
+				5186515D23552F040078E021 /* NNW3Entry.swift */,
+				5186515B23552F040078E021 /* NNW3Feed.swift */,
+			);
+			path = NNW3;
+			sourceTree = "<group>";
+		};
 		5183CCDB226F1EEB0010922C /* Progress */ = {
 			isa = PBXGroup;
 			children = (
@@ -1256,6 +1284,7 @@
 				849A97551ED9EAC3007D329B /* Add Feed */,
 				849A97411ED9EAA9007D329B /* Add Folder */,
 				5144EA39227A377700D19003 /* OPML */,
+				516CAC53235529180038D354 /* NNW3 */,
 			);
 			path = MainWindow;
 			sourceTree = "<group>";
@@ -1969,12 +1998,12 @@
 				ORGANIZATIONNAME = "Ranchero Software";
 				TargetAttributes = {
 					6581C73220CED60000F4AD34 = {
-						DevelopmentTeam = M8L2WTLA8W;
+						DevelopmentTeam = SHJK2V3AJG;
-						ProvisioningStyle = Manual;
+						ProvisioningStyle = Automatic;
 					};
 					840D617B2029031C009BC708 = {
 						CreatedOnToolsVersion = 9.3;
-						DevelopmentTeam = M8L2WTLA8W;
+						DevelopmentTeam = SHJK2V3AJG;
 						ProvisioningStyle = Automatic;
 						SystemCapabilities = {
 							com.apple.BackgroundModes = {
@@ -1990,8 +2019,8 @@
 					};
 					849C645F1ED37A5D003D8FC0 = {
 						CreatedOnToolsVersion = 8.2.1;
-						DevelopmentTeam = M8L2WTLA8W;
+						DevelopmentTeam = SHJK2V3AJG;
-						ProvisioningStyle = Manual;
+						ProvisioningStyle = Automatic;
 						SystemCapabilities = {
 							com.apple.HardenedRuntime = {
 								enabled = 1;
@@ -2000,7 +2029,7 @@
 					};
 					849C64701ED37A5D003D8FC0 = {
 						CreatedOnToolsVersion = 8.2.1;
-						DevelopmentTeam = 9C84TZ7Q6Z;
+						DevelopmentTeam = SHJK2V3AJG;
 						ProvisioningStyle = Automatic;
 						TestTargetID = 849C645F1ED37A5D003D8FC0;
 					};
@@ -2255,6 +2284,7 @@
 			files = (
 				844B5B651FEA11F200C7C76A /* GlobalKeyboardShortcuts.plist in Resources */,
 				5127B23A222B4849006D641D /* DetailKeyboardShortcuts.plist in Resources */,
+				516CAC4C235521070038D354 /* ImportNNW3Sheet.xib in Resources */,
 				845479881FEB77C000AD8B59 /* TimelineKeyboardShortcuts.plist in Resources */,
 				848362FF2262A30E00DA1D35 /* template.html in Resources */,
 				848363082262A3DD00DA1D35 /* Main.storyboard in Resources */,
@@ -2462,9 +2492,11 @@
 				D5A2678C20130ECF00A8D3C0 /* Author+Scriptability.swift in Sources */,
 				84F2D5371FC22FCC00998D64 /* PseudoFeed.swift in Sources */,
 				51EF0F902279C9500050506E /* AccountsAddViewController.swift in Sources */,
+				5186515223552E610078E021 /* NNW3PlistConverter.swift in Sources */,
 				D57BE6E0204CD35F00D11AAC /* NSScriptCommand+NetNewsWire.swift in Sources */,
 				D553738B20186C20006D8857 /* Article+Scriptability.swift in Sources */,
 				845EE7C11FC2488C00854A1F /* SmartFeed.swift in Sources */,
+				51865167235556240078E021 /* NNW3FeedsImporter.swift in Sources */,
 				84702AA41FA27AC0006B8943 /* MarkStatusCommand.swift in Sources */,
 				D5907D7F2004AC00005947E5 /* NSApplication+Scriptability.swift in Sources */,
 				8405DD9C22153BD7008CE1BF /* NSView-Extensions.swift in Sources */,
@@ -2503,6 +2535,7 @@
 				5144EA51227B8E4500D19003 /* AccountsFeedbinWindowController.swift in Sources */,
 				84AD1EBC2032AF5C00BC20B7 /* SidebarOutlineDataSource.swift in Sources */,
 				845A29241FC9255E007B49E3 /* SidebarCellAppearance.swift in Sources */,
+				5186515E23552F040078E021 /* NNW3Feed.swift in Sources */,
 				845EE7B11FC2366500854A1F /* StarredFeedDelegate.swift in Sources */,
 				848F6AE51FC29CFB002D422E /* FaviconDownloader.swift in Sources */,
 				84C9FC7722629E1200D921D6 /* AdvancedPreferencesViewController.swift in Sources */,
@@ -2517,12 +2550,14 @@
 				84DEE56522C32CA4005FC42C /* SmartFeedDelegate.swift in Sources */,
 				845213231FCA5B11003B6E93 /* ImageDownloader.swift in Sources */,
 				51EF0F922279CA620050506E /* AccountsAddTableCellView.swift in Sources */,
+				5186515F23552F040078E021 /* NNW3Document.swift in Sources */,
 				849A97431ED9EAA9007D329B /* AddFolderWindowController.swift in Sources */,
 				8405DDA522168C62008CE1BF /* TimelineContainerViewController.swift in Sources */,
 				844B5B671FEA18E300C7C76A /* MainWIndowKeyboardHandler.swift in Sources */,
 				848D578E21543519005FFAD5 /* PasteboardFeed.swift in Sources */,
 				5144EA2F2279FAB600D19003 /* AccountsDetailViewController.swift in Sources */,
 				849A97801ED9EC42007D329B /* DetailViewController.swift in Sources */,
+				5186516023552F040078E021 /* NNW3Entry.swift in Sources */,
 				84C9FC6722629B9000D921D6 /* AppDelegate.swift in Sources */,
 				84C9FC7A22629E1200D921D6 /* AccountsTableViewBackgroundView.swift in Sources */,
 				84CAFCAF22BC8C35007694F0 /* FetchRequestOperation.swift in Sources */,
@@ -2544,6 +2579,7 @@
 				5144EA40227A37EC00D19003 /* ImportOPMLWindowController.swift in Sources */,
 				849A976D1ED9EBC8007D329B /* TimelineTableView.swift in Sources */,
 				84D52E951FE588BB00D14F5B /* DetailStatusBarView.swift in Sources */,
+				516CAC4D235521070038D354 /* ImportNNW3WindowController.swift in Sources */,
 				D5E4CC64202C1AC1009B4FFC /* MainWindowController+Scriptability.swift in Sources */,
 				84C9FC7922629E1200D921D6 /* PreferencesWindowController.swift in Sources */,
 				84411E711FE5FBFA004B527F /* SmallIconProvider.swift in Sources */,