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

Apps/Attendi/View Models/ContentViewModel.swift

@@ -24,7 +24,7 @@ extension ContentView {
 
         /// The service that transcribes the recorded audio into text on device.
         @ObservationIgnored
-        let transcriber = AudioTranscribingService()
+        let transcriber = AudioTranscribing()
 
         // MARK: Methods
 

Packages/Features/Sources/Recording/Models/Transcription.swift

@@ -1,7 +1,7 @@
 import Foundation
 
 /// A transcription of a processed recording.
-public struct Transcription {
+public struct Transcription: Identifiable, Sendable {
     
     // MARK: Properties
 
@@ -29,7 +29,3 @@ public struct Transcription {
     }
 
 }
-
-// MARK: - Identifiable
-
-extension Transcription: Identifiable {}

Packages/Features/Sources/Recording/Protocols/RecordingService.swift

@@ -6,6 +6,8 @@ import Foundation
 /// state machine — for example, with a real microphone backend in the app, or with a mock in unit tests.
 public protocol RecordingService: Sendable {
 
+    // MARK: Methods
+
     /// Starts a new audio recording from the microphone.
     func start() async throws
 

Packages/Features/Sources/Recording/Protocols/Transcribing.swift

@@ -4,12 +4,19 @@ import Foundation
 ///
 /// ``RecordingView`` attaches the service to its model at initialization, so the transcription can be swapped without touching the feature's
 /// state machine — for example, with a real transcription backend in the app, or with a fast mock in unit tests.
-public protocol TranscribingService: Sendable {
+public protocol Transcribing: Sendable {
 
-    /// Transcribes the given recorded audio into text.
+    // MARK: Methods
+
+    /// Transcribes the given recorded audio into text, letting the service be called directly as a function.
     ///
-    /// - 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.
-    func transcribe(_ audio: Data) async throws -> String
+    func callAsFunction(
+        _ audio: Data,
+        locale: Locale
+    ) async throws -> Transcription
 
 }

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)
     }
 
 }

Packages/Features/Sources/Recording/View Models/RecordingViewModel.swift

@@ -7,7 +7,7 @@ extension RecordingView {
     ///
     /// The model implements the recording flow as a ``State`` machine: it exposes the visibility and icon of the view's controls for the current state, counts the
     /// elapsed recording time, and processes the recorded input once it is sent. The audio capture and its transcription are delegated to the
-    /// ``RecordingService`` and ``TranscribingService`` attached at initialization; when either of them fails, the model falls back to the not-recording state.
+    /// ``RecordingService`` and ``Transcribing`` attached at initialization; when either of them fails, the model falls back to the not-recording state.
     @MainActor
     @Observable
     final class Model {
@@ -31,9 +31,9 @@ extension RecordingView {
         @ObservationIgnored
         private var taskTimer: Task<Void, Never>?
 
-        /// The service that transcribes the recorded audio into text.
+        /// The callable service that transcribes the recorded audio into text.
         @ObservationIgnored
-        private let transcriber: any TranscribingService
+        private let transcribe: any Transcribing
 
         // MARK: Initializers
 
@@ -41,13 +41,13 @@ extension RecordingView {
         ///
         /// - Parameters:
         ///   - recorder: The service that captures the audio from a microphone. Defaults to ``DummyRecordingService``.
-        ///   - transcriber: The service that transcribes the recorded audio into text. Defaults to ``DummyTranscribingService``.
+        ///   - transcribe: The callable service that transcribes the recorded audio into text. Defaults to ``DummyTranscribing``.
         init(
             recorder: any RecordingService = DummyRecordingService(),
-            transcriber: any TranscribingService = DummyTranscribingService()
+            transcribe: any Transcribing = DummyTranscribing()
         ) {
             self.recorder = recorder
-            self.transcriber = transcriber
+            self.transcribe = transcribe
         }
 
         // MARK: Computed
@@ -185,7 +185,10 @@ private extension RecordingView.Model {
         do {
             let audio = try await recorder.stop()
 
-            textTranscription = try await transcriber.transcribe(audio)
+            textTranscription = try await transcribe(
+                audio,
+                locale: .current
+            ).text
         } catch {
             textTranscription = nil
         }

Packages/Features/Sources/Recording/Views/RecordingView.swift

@@ -26,12 +26,12 @@ public struct RecordingView: View {
     ///   - onTranscription: The closure invoked with the transcribed text of every processed recording. Defaults to a closure that does nothing.
     public init(
         recorder: any RecordingService,
-        transcriber: any TranscribingService,
+        transcriber: any Transcribing,
         onTranscription: @escaping (String) -> Void = { _ in }
     ) {
         self.model = .init(
             recorder: recorder,
-            transcriber: transcriber
+            transcribe: transcriber
         )
         self.onTranscription = onTranscription
     }
@@ -130,6 +130,6 @@ private enum Constant {
 ) {
     RecordingView(
         recorder: DummyRecordingService(),
-        transcriber: DummyTranscribingService()
+        transcriber: DummyTranscribing()
     )
 }

Packages/Features/Tests/Recording/View Models/RecordingViewModelTests.swift

@@ -312,7 +312,7 @@ struct RecordingViewModelTests {
             let recorder = RecordingServiceMock()
             let model = Model(
                 recorder: recorder,
-                transcriber: TranscribingServiceMock()
+                transcribe: TranscribingMock()
             )
 
             model.state = .processing
@@ -348,7 +348,7 @@ struct RecordingViewModelTests {
 
         @Test func `returns to not recording with a reset timer and a transcription`() async throws {
             let model = Model(
-                transcriber: TranscribingServiceMock()
+                transcribe: TranscribingMock()
             )
 
             model.state = .recording
@@ -372,12 +372,12 @@ struct RecordingViewModelTests {
         }
 
         @Test func `clears the transcription when the transcriber fails`() async throws {
-            let transcriber = TranscribingServiceMock()
+            let transcriber = TranscribingMock()
 
             transcriber.error = ErrorMock()
 
             let model = Model(
-                transcriber: transcriber
+                transcribe: transcriber
             )
 
             model.state = .processing
@@ -392,7 +392,7 @@ struct RecordingViewModelTests {
 
         @Test func `clears the transcription when a new recording starts`() async throws {
             let model = Model(
-                transcriber: TranscribingServiceMock()
+                transcribe: TranscribingMock()
             )
 
             model.state = .processing
@@ -472,7 +472,7 @@ private final class RecordingServiceMock: RecordingService {
 
 /// A transcribing service with a configurable delay, output, and failure.
 @MainActor
-private final class TranscribingServiceMock: TranscribingService {
+private final class TranscribingMock: Transcribing {
 
     /// The duration of the simulated transcription work.
     var delay: Duration = .seconds(0.2)
@@ -483,14 +483,14 @@ private final class TranscribingServiceMock: TranscribingService {
     /// The transcription the service returns.
     var transcription = "This is a mocked transcription."
 
-    func transcribe(_ audio: Data) async throws -> String {
+    func callAsFunction(_ audio: Data, locale: Locale) async throws -> Transcription {
         try await Task.sleep(for: delay)
 
         if let error {
             throw error
         }
 
-        return transcription
+        return .init(text: transcription)
     }
 
 }