Made the transcribing callable and per-call for the transcribing protocol in the Recording package target.

Packages/Features/Sources/Recording/Services/AudioTranscribing.swift

@@ -4,38 +4,30 @@ import Speech
 /// The transcribing service that transcribes recorded audio into text on device.
 ///
 /// The service writes the recorded audio into a temporary `.m4a` file and runs it through a `SpeechAnalyzer` with a `SpeechTranscriber`
-/// module, joining the finalized results into the returned text. The transcription happens in the locale given at initialization — or rather in the
+/// module, joining the finalized results into the returned transcription. The transcription happens in the locale given at each call — or rather in the
 /// closest equivalent the transcriber supports. The speech model assets for that locale are downloaded and installed on first use; every
 /// transcription after that happens entirely offline.
-public struct AudioTranscribingService: TranscribingService {
-
-    // MARK: Properties
-
-    /// The locale of the spoken language to transcribe.
-    private let locale: Locale
+public struct AudioTranscribing: Transcribing {
 
     // MARK: Initializers
 
-    /// Creates an audio transcribing service for a locale.
-    ///
-    /// - Parameter locale: The locale of the spoken language to transcribe. Defaults to the user's current locale.
-    public init(
-        locale: Locale = .current
-    ) {
-        self.locale = locale
-    }
+    /// Creates an audio transcribing service.
+    public init() {}
 
     // MARK: Methods
 
     /// Transcribes the given recorded audio into text, deleting the temporary audio file when the transcription finishes.
     ///
-    /// - Parameter audio: The recorded audio to transcribe.
+    /// - Parameters:
+    ///   - audio: The recorded audio to transcribe.
+    ///   - locale: The locale of the spoken language to transcribe.
     /// - Returns: The transcription of the recorded audio.
-    /// - Throws: ``AudioTranscribingError/localeNotSupported`` when the transcriber supports no equivalent of the service's locale,
+    /// - Throws: ``AudioTranscribingError/localeNotSupported`` when the transcriber supports no equivalent of the given locale,
     /// or any error thrown while installing the speech model assets, reading the audio file, or analyzing its contents.
-    public func transcribe(
-        _ audio: Data
-    ) async throws -> String {
+    public func callAsFunction(
+        _ audio: Data,
+        locale: Locale
+    ) async throws -> Transcription {
         try audio.write(to: Constant.File.url)
 
         defer {
@@ -71,16 +63,16 @@ public struct AudioTranscribingService: TranscribingService {
             await analyzer.cancelAndFinishNow()
         }
 
-        return try await text
+        return try await .init(text: text)
     }
 
 }
 
 // MARK: - Errors
 
-/// The errors thrown by ``AudioTranscribingService``.
+/// The errors thrown by ``AudioTranscribing``.
 public enum AudioTranscribingError: Error {
-    /// The transcriber supports no equivalent of the locale the service was created with.
+    /// The transcriber supports no equivalent of the locale the transcription was requested with.
     case localeNotSupported
 }
 

Packages/Features/Sources/Recording/Services/DummyTranscribing.swift

@@ -4,20 +4,23 @@ import Foundation
 ///
 /// The service is internal on purpose: it only backs the feature's previews and the default values of its model, and is not part of the
 /// package's public interface.
-struct DummyTranscribingService: TranscribingService {
+struct DummyTranscribing: Transcribing {
 
     // MARK: Methods
 
     /// Simulates the transcription of the given recorded audio with a two-second delay.
     ///
-    /// - Parameter audio: The recorded audio to transcribe.
+    /// - Parameters:
+    ///   - audio: The recorded audio to transcribe.
+    ///   - locale: The locale of the spoken language to transcribe.
     /// - Returns: A dummy transcription.
-    func transcribe(
-        _ audio: Data
-    ) async throws -> String {
+    func callAsFunction(
+        _ audio: Data,
+        locale: Locale
+    ) async throws -> Transcription {
         try await Task.sleep(for: Constant.Delay.transcribing)
 
-        return Constant.Text.transcription
+        return .init(text: Constant.Text.transcription)
     }
 
 }