Fix numerous concurrency warnings.

Account/Sources/Account/AccountDelegates/FeedlyAccountDelegate.swift

@@ -271,7 +271,7 @@ final class FeedlyAccountDelegate: AccountDelegate {
 		}
 	}
 
-	private func importOPML(for account: Account, opmlFile: URL, completion: @escaping (Result<Void, Error>) -> Void) {
+	private func importOPML(for account: Account, opmlFile: URL, completion: @escaping @Sendable (Result<Void, Error>) -> Void) {
 		let data: Data
 		
 		do {
@@ -286,21 +286,24 @@ final class FeedlyAccountDelegate: AccountDelegate {
 		refreshProgress.addToNumberOfTasksAndRemaining(1)
 		
 		caller.importOpml(data) { result in
-			switch result {
-			case .success:
-				os_log(.debug, log: self.log, "Import OPML done.")
-				self.refreshProgress.completeTask()
-				self.isOPMLImportInProgress = false
-				DispatchQueue.main.async {
-					completion(.success(()))
-				}
-			case .failure(let error):
-				os_log(.debug, log: self.log, "Import OPML failed.")
-				self.refreshProgress.completeTask()
-				self.isOPMLImportInProgress = false
-				DispatchQueue.main.async {
-					let wrappedError = AccountError.wrappedError(error: error, account: account)
-					completion(.failure(wrappedError))
+
+			MainActor.assumeIsolated {
+				switch result {
+				case .success:
+					os_log(.debug, log: self.log, "Import OPML done.")
+					self.refreshProgress.completeTask()
+					self.isOPMLImportInProgress = false
+					DispatchQueue.main.async {
+						completion(.success(()))
+					}
+				case .failure(let error):
+					os_log(.debug, log: self.log, "Import OPML failed.")
+					self.refreshProgress.completeTask()
+					self.isOPMLImportInProgress = false
+					DispatchQueue.main.async {
+						let wrappedError = AccountError.wrappedError(error: error, account: account)
+						completion(.failure(wrappedError))
+					}
 				}
 			}
 		}

Account/Sources/Account/AccountDelegates/NewsBlurAccountDelegate.swift

@@ -8,7 +8,7 @@
 
 import Articles
 import Database
-@preconcurrency import Parser
+import Parser
 import Web
 import SyncDatabase
 import os.log

Account/Sources/Account/ContainerIdentifier.swift

@@ -9,7 +9,8 @@
 import Foundation
 
 public protocol ContainerIdentifiable {
-	var containerID: ContainerIdentifier? { get }
+	
+	@MainActor var containerID: ContainerIdentifier? { get }
 }
 
 public enum ContainerIdentifier: Hashable, Equatable, Sendable {

Account/Sources/Account/Feedly/FeedlyAPICaller.swift

@@ -14,7 +14,7 @@ import Feedly
 protocol FeedlyAPICallerDelegate: AnyObject {
 	/// Implemented by the `FeedlyAccountDelegate` reauthorize the client with a fresh OAuth token so the client can retry the unauthorized request.
 	/// Pass `true` to the completion handler if the failing request should be retried with a fresh token or `false` if the unauthorized request should complete with the original failure error.
-	func reauthorizeFeedlyAPICaller(_ caller: FeedlyAPICaller, completionHandler: @escaping (Bool) -> ())
+	@MainActor func reauthorizeFeedlyAPICaller(_ caller: FeedlyAPICaller, completionHandler: @escaping (Bool) -> ())
 }
 
 final class FeedlyAPICaller {
@@ -86,55 +86,57 @@ final class FeedlyAPICaller {
 		isSuspended = false
 	}
 	
-	func send<R: Decodable>(request: URLRequest, resultType: R.Type, dateDecoding: JSONDecoder.DateDecodingStrategy = .iso8601, keyDecoding: JSONDecoder.KeyDecodingStrategy = .useDefaultKeys, completion: @escaping (Result<(HTTPURLResponse, R?), Error>) -> Void) {
+	func send<R: Decodable & Sendable>(request: URLRequest, resultType: R.Type, dateDecoding: JSONDecoder.DateDecodingStrategy = .iso8601, keyDecoding: JSONDecoder.KeyDecodingStrategy = .useDefaultKeys, completion: @escaping (Result<(HTTPURLResponse, R?), Error>) -> Void) {
 		transport.send(request: request, resultType: resultType, dateDecoding: dateDecoding, keyDecoding: keyDecoding) { [weak self] result in
-			assert(Thread.isMainThread)
 			
-			switch result {
-			case .success:
-				completion(result)
-			case .failure(let error):
-				switch error {
-				case TransportError.httpError(let statusCode) where statusCode == 401:
-					
-					assert(self == nil ? true : self?.delegate != nil, "Check the delegate is set to \(FeedlyAccountDelegate.self).")
-					
-					guard let self = self, let delegate = self.delegate else {
-						completion(result)
-						return
-					}
-					
-					/// Capture the credentials before the reauthorization to check for a change.
-					let credentialsBefore = self.credentials
-					
-					delegate.reauthorizeFeedlyAPICaller(self) { [weak self] isReauthorizedAndShouldRetry in
-						assert(Thread.isMainThread)
-						
-						guard isReauthorizedAndShouldRetry, let self = self else {
-							completion(result)
-							return
-						}
-						
-						// Check for a change. Not only would it help debugging, but it'll also catch an infinitely recursive attempt to refresh.
-						guard let accessToken = self.credentials?.secret, accessToken != credentialsBefore?.secret else {
-							assertionFailure("Could not update the request with a new OAuth token. Did \(String(describing: self.delegate)) set them on \(self)?")
-							completion(result)
-							return
-						}
-						
-						var reauthorizedRequest = request
-						reauthorizedRequest.setValue("OAuth \(accessToken)", forHTTPHeaderField: HTTPRequestHeader.authorization)
-						
-						self.send(request: reauthorizedRequest, resultType: resultType, dateDecoding: dateDecoding, keyDecoding: keyDecoding, completion: completion)
-					}
-				default:
+			MainActor.assumeIsolated {
+				
+				switch result {
+				case .success:
 					completion(result)
+				case .failure(let error):
+					switch error {
+					case TransportError.httpError(let statusCode) where statusCode == 401:
+						
+						assert(self == nil ? true : self?.delegate != nil, "Check the delegate is set to \(FeedlyAccountDelegate.self).")
+						
+						guard let self = self, let delegate = self.delegate else {
+							completion(result)
+							return
+						}
+						
+						/// Capture the credentials before the reauthorization to check for a change.
+						let credentialsBefore = self.credentials
+						
+						delegate.reauthorizeFeedlyAPICaller(self) { [weak self] isReauthorizedAndShouldRetry in
+							assert(Thread.isMainThread)
+							
+							guard isReauthorizedAndShouldRetry, let self = self else {
+								completion(result)
+								return
+							}
+							
+							// Check for a change. Not only would it help debugging, but it'll also catch an infinitely recursive attempt to refresh.
+							guard let accessToken = self.credentials?.secret, accessToken != credentialsBefore?.secret else {
+								assertionFailure("Could not update the request with a new OAuth token. Did \(String(describing: self.delegate)) set them on \(self)?")
+								completion(result)
+								return
+							}
+							
+							var reauthorizedRequest = request
+							reauthorizedRequest.setValue("OAuth \(accessToken)", forHTTPHeaderField: HTTPRequestHeader.authorization)
+							
+							self.send(request: reauthorizedRequest, resultType: resultType, dateDecoding: dateDecoding, keyDecoding: keyDecoding, completion: completion)
+						}
+					default:
+						completion(result)
+					}
 				}
 			}
 		}
 	}
 	
-	func importOpml(_ opmlData: Data, completion: @escaping (Result<Void, Error>) -> ()) {
+	func importOpml(_ opmlData: Data, completion: @escaping @Sendable (Result<Void, Error>) -> ()) {
 		guard !isSuspended else {
 			return DispatchQueue.main.async {
 				completion(.failure(TransportError.suspended))
@@ -566,7 +568,7 @@ extension FeedlyAPICaller: OAuthAcessTokenRefreshRequesting {
 
 extension FeedlyAPICaller: FeedlyGetCollectionsService {
 	
-	func getCollections(completion: @escaping (Result<[FeedlyCollection], Error>) -> ()) {
+	func getCollections(completion: @escaping @Sendable (Result<[FeedlyCollection], Error>) -> ()) {
 		guard !isSuspended else {
 			return DispatchQueue.main.async {
 				completion(.failure(TransportError.suspended))

Account/Sources/Account/Feedly/OAuthAcessTokenRefreshing.swift

@@ -43,5 +43,5 @@ public protocol OAuthAcessTokenRefreshRequesting {
 /// Implemented by concrete types to perform the actual request.
 protocol OAuthAccessTokenRefreshing: AnyObject {
 	
-	func refreshAccessToken(with refreshToken: String, client: OAuthAuthorizationClient, completion: @escaping (Result<OAuthAuthorizationGrant, Error>) -> ())
+	@MainActor func refreshAccessToken(with refreshToken: String, client: OAuthAuthorizationClient, completion: @escaping (Result<OAuthAuthorizationGrant, Error>) -> ())
 }

CloudKitExtras/Sources/CloudKitExtras/CloudKitZone.swift

@@ -28,6 +28,7 @@ public enum CloudKitZoneError: LocalizedError {
 }
 
 public protocol CloudKitZoneDelegate: AnyObject {
+	
 	func cloudKitDidModify(changed: [CKRecord], deleted: [CloudKitRecordKey], completion: @escaping (Result<Void, Error>) -> Void);
 }
 

Feedly/Sources/Feedly/Operations/FeedlyGetCollectionsOperation.swift

@@ -31,15 +31,18 @@ public final class FeedlyGetCollectionsOperation: FeedlyOperation, FeedlyCollect
 		os_log(.debug, log: log, "Requesting collections.")
 		
 		service.getCollections { result in
-			switch result {
-			case .success(let collections):
-				os_log(.debug, log: self.log, "Received collections: %{public}@", collections.map { $0.id })
-				self.collections = collections
-				self.didFinish()
-				
-			case .failure(let error):
-				os_log(.debug, log: self.log, "Unable to request collections: %{public}@.", error as NSError)
-				self.didFinish(with: error)
+
+			MainActor.assumeIsolated {
+				switch result {
+				case .success(let collections):
+					os_log(.debug, log: self.log, "Received collections: %{public}@", collections.map { $0.id })
+					self.collections = collections
+					self.didFinish()
+					
+				case .failure(let error):
+					os_log(.debug, log: self.log, "Unable to request collections: %{public}@.", error as NSError)
+					self.didFinish(with: error)
+				}
 			}
 		}
 	}

Feedly/Sources/Feedly/Services/FeedlyGetCollectionsService.swift

@@ -9,5 +9,5 @@
 import Foundation
 
 public protocol FeedlyGetCollectionsService: AnyObject {
-	func getCollections(completion: @escaping (Result<[FeedlyCollection], Error>) -> ())
+	func getCollections(completion: @escaping @Sendable (Result<[FeedlyCollection], Error>) -> ())
 }

Mac/ShareExtension/ShareViewController.swift

@@ -10,7 +10,7 @@ import Cocoa
 import os.log
 import UniformTypeIdentifiers
 
-class ShareViewController: NSViewController {
+final class ShareViewController: NSViewController {
 
 	@IBOutlet weak var nameTextField: NSTextField!
 	@IBOutlet weak var folderPopUpButton: NSPopUpButton!

Parser/Sources/Swift/ParserData+Parser.swift

@@ -0,0 +1,10 @@
+//
+//  File.swift
+//  
+//
+//  Created by Brent Simmons on 4/7/24.
+//
+
+import Foundation
+
+extension ParserData: @unchecked Sendable {}

Parser/Sources/Swift/RSHTMLMetadata+Parser.swift

@@ -0,0 +1,10 @@
+//
+//  File.swift
+//  
+//
+//  Created by Brent Simmons on 4/7/24.
+//
+
+import Foundation
+
+extension RSHTMLMetadataParser: @unchecked Sendable {}

Shared/HTMLMetadata/HTMLMetadataDownloader.swift

@@ -14,7 +14,7 @@ struct HTMLMetadataDownloader {
 
 	static let serialDispatchQueue = DispatchQueue(label: "HTMLMetadataDownloader")
 
-	@MainActor static func downloadMetadata(for url: String, _ completion: @escaping (RSHTMLMetadata?) -> Void) {
+	@MainActor static func downloadMetadata(for url: String, _ completion: @escaping @Sendable (RSHTMLMetadata?) -> Void) {
 		guard let actualURL = URL(unicodeString: url) else {
 			completion(nil)
 			return
@@ -32,7 +32,7 @@ struct HTMLMetadataDownloader {
 		}
 	}
 
-	private static func parseMetadata(with parserData: ParserData, _ completion: @escaping (RSHTMLMetadata?) -> Void) {
+	private static func parseMetadata(with parserData: ParserData, _ completion: @escaping @Sendable (RSHTMLMetadata?) -> Void) {
 		serialDispatchQueue.async {
 			let htmlMetadata = RSHTMLMetadataParser.htmlMetadata(with: parserData)
 			DispatchQueue.main.async {

Shared/Images/FeedIconDownloader.swift

@@ -216,11 +216,13 @@ private extension FeedIconDownloader {
 
 		HTMLMetadataDownloader.downloadMetadata(for: homePageURL) { (metadata) in
 
-			self.urlsInProgress.remove(homePageURL)
-			guard let metadata = metadata else {
-				return
+			MainActor.assumeIsolated {
+				self.urlsInProgress.remove(homePageURL)
+				guard let metadata = metadata else {
+					return
+				}
+				self.pullIconURL(from: metadata, homePageURL: homePageURL, feed: feed)
 			}
-			self.pullIconURL(from: metadata, homePageURL: homePageURL, feed: feed)
 		}
 	}