Fix concurrency warnings in Parser module.

Account/Sources/Account/LocalAccountRefresher.swift

@@ -101,36 +101,37 @@ extension LocalAccountRefresher: DownloadSessionDelegate {
 		}
 
 		let parserData = ParserData(url: feed.url, data: data)
-		FeedParser.parse(parserData) { (parsedFeed, error) in
-			
-			guard let account = feed.account, let parsedFeed = parsedFeed, error == nil else {
-				completion()
-				self.delegate?.localAccountRefresher(self, requestCompletedFor: feed)
-				return
-			}
-			
-			Task { @MainActor in
+		Task { @MainActor in
 
-				do {
-					let articleChanges = try await account.update(feed: feed, with: parsedFeed)
+			do {
+				let parsedFeed = try await FeedParser.parse(parserData)
 
-					if let httpResponse = response as? HTTPURLResponse {
-						feed.conditionalGetInfo = HTTPConditionalGetInfo(urlResponse: httpResponse)
-					}
-					feed.contentHash = dataHash
-
-					self.delegate?.localAccountRefresher(self, requestCompletedFor: feed)
-					self.delegate?.localAccountRefresher(self, articleChanges: articleChanges) {
-						completion()
-					}
-
-				} catch {
+				guard let account = feed.account, let parsedFeed else {
 					completion()
 					self.delegate?.localAccountRefresher(self, requestCompletedFor: feed)
+					return
 				}
+
+
+				let articleChanges = try await account.update(feed: feed, with: parsedFeed)
+
+				if let httpResponse = response as? HTTPURLResponse {
+					feed.conditionalGetInfo = HTTPConditionalGetInfo(urlResponse: httpResponse)
+				}
+				feed.contentHash = dataHash
+
+				self.delegate?.localAccountRefresher(self, requestCompletedFor: feed)
+				self.delegate?.localAccountRefresher(self, articleChanges: articleChanges) {
+					completion()
+				}
+
+			} catch {
+				completion()
+				self.delegate?.localAccountRefresher(self, requestCompletedFor: feed)
 			}
 		}
 	}
+
 	
 	func downloadSession(_ downloadSession: DownloadSession, shouldContinueAfterReceivingData data: Data, representedObject: AnyObject) -> Bool {
 		let feed = representedObject as! Feed

LocalAccount/Sources/LocalAccount/InitialFeedDownloader.swift

@@ -23,14 +23,25 @@ public struct InitialFeedDownloader {
 
 	@MainActor public static func download(_ url: URL,_ completion: @escaping @Sendable (_ parsedFeed: ParsedFeed?) -> Void) {
 
-		downloadUsingCache(url) { (data, response, error) in
-			guard let data = data else {
+		Task {
+
+			guard let downloadData = try? await downloadUsingCache(url) else {
+				completion(nil)
+				return
+			}
+			guard let data = downloadData.data else {
 				completion(nil)
 				return
 			}
 
 			let parserData = ParserData(url: url.absoluteString, data: data)
-			FeedParser.parse(parserData) { (parsedFeed, error) in
+
+			Task.detached {
+				guard let parsedFeed = try? await FeedParser.parse(parserData) else {
+					completion(nil)
+					return
+				}
+
 				completion(parsedFeed)
 			}
 		}

Parser/Sources/ObjC/ParserData.h

@@ -10,6 +10,7 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
+__attribute__((swift_attr("@Sendable")))
 @interface ParserData : NSObject
 
 @property (nonatomic, readonly) NSString *url;

Parser/Sources/Swift/Feeds/FeedParser.swift

@@ -12,12 +12,8 @@ import ParserObjC
 // FeedParser handles RSS, Atom, JSON Feed, and RSS-in-JSON.
 // You don’t need to know the type of feed.
 
-public typealias FeedParserCallback = (_ parsedFeed: ParsedFeed?, _ error: Error?) -> Void
-
 public struct FeedParser {
 
-	private static let parseQueue = DispatchQueue(label: "FeedParser parse queue")
-	
 	public static func canParse(_ parserData: ParserData) -> Bool {
 
 		let type = feedType(parserData)
@@ -30,62 +26,26 @@ public struct FeedParser {
 		}
 	}
 
-	public static func mightBeAbleToParseBasedOnPartialData(_ parserData: ParserData) -> Bool {
+	public static func parse(_ parserData: ParserData) async throws -> ParsedFeed? {
 
-		let type = feedType(parserData, isPartialData: true)
+		let type = feedType(parserData)
 
 		switch type {
-		case .jsonFeed, .rssInJSON, .rss, .atom, .unknown:
-			return true
-		default:
-			return false
-		}
-	}
 
-	public static func parse(_ parserData: ParserData) throws -> ParsedFeed? {
+		case .jsonFeed:
+			return try JSONFeedParser.parse(parserData)
 
-		// This is generally fast enough to call on the main thread —
-		// but it’s probably a good idea to use a background queue if
-		// you might be doing a lot of parsing. (Such as in a feed reader.)
+		case .rssInJSON:
+			return try RSSInJSONParser.parse(parserData)
 
-		do {
-			let type = feedType(parserData)
+		case .rss:
+			return RSSParser.parse(parserData)
 
-			switch type {
+		case .atom:
+			return AtomParser.parse(parserData)
 
-			case .jsonFeed:
-				return try JSONFeedParser.parse(parserData)
-
-			case .rssInJSON:
-				return try RSSInJSONParser.parse(parserData)
-
-			case .rss:
-				return RSSParser.parse(parserData)
-
-			case .atom:
-				return AtomParser.parse(parserData)
-
-			case .unknown, .notAFeed:
-				return nil
-			}
-		}
-		catch { throw error }
-	}
-
-	public static func parse(_ parserData: ParserData, _ completion: @escaping FeedParserCallback) {
-
-		parseQueue.async {
-			do {
-				let parsedFeed = try parse(parserData)
-				DispatchQueue.main.async {
-					completion(parsedFeed, nil)
-				}
-			}
-			catch {
-				DispatchQueue.main.async {
-					completion(nil, error)
-				}
-			}
+		case .unknown, .notAFeed:
+			return nil
 		}
 	}
 }