Implement a first version of Apple's Translation

The user can now choose between his instance's server, DeepL (with API
key) and Apple's Translation framework. A translation is cleared if
the translation type is changed. The strings aren't yet written, but
the translations settings view's inconsistent background is now fixed.

IceCubesApp/App/Tabs/Settings/TranslationSettingsView.swift

@@ -11,8 +11,8 @@ struct TranslationSettingsView: View {
 
   var body: some View {
     Form {
-      deepLToggle
-      if preferences.alwaysUseDeepl {
+      translationSelector
+      if preferences.preferredTranslationType == .useDeepl {
         Section("settings.translation.user-api-key") {
           deepLPicker
           SecureField("settings.translation.user-api-key", text: $apiKey)
@@ -51,10 +51,12 @@ struct TranslationSettingsView: View {
   }
 
   @ViewBuilder
-  private var deepLToggle: some View {
+  private var translationSelector: some View {
     @Bindable var preferences = preferences
-    Toggle(isOn: $preferences.alwaysUseDeepl) {
-      Text("settings.translation.always-deepl")
+    Picker("settings.translation.preferred-translation-type", selection: $preferences.preferredTranslationType) {
+      ForEach(TranslationType.allCases, id: \.self) { type in
+        Text(type.rawValue).tag(type)
+      }
     }
     #if !os(visionOS)
     .listRowBackground(theme.primaryBackgroundColor)
@@ -80,6 +82,9 @@ struct TranslationSettingsView: View {
     } footer: {
       Text("settings.translation.auto-detect-post-language-footer")
     }
+    #if !os(visionOS)
+    .listRowBackground(theme.primaryBackgroundColor)
+    #endif
   }
 
   private func writeNewValue() {

IceCubesApp/Resources/Localization/Localizable.xcstrings

@@ -59867,6 +59867,7 @@
       }
     },
     "settings.translation.always-deepl" : {
+      "extractionState" : "stale",
       "localizations" : {
         "be" : {
           "stringUnit" : {
@@ -60573,6 +60574,9 @@
           }
         }
       }
+    },
+    "settings.translation.preferred-translation-type" : {
+
     },
     "settings.translation.user-api-key" : {
       "localizations" : {

Packages/Env/Sources/Env/DeepLUserAPIHandler.swift

@@ -24,7 +24,7 @@ public enum DeepLUserAPIHandler {
   }
 
   public static func readIfAllowed() -> String? {
-    guard UserPreferences.shared.alwaysUseDeepl else { return nil }
+    guard UserPreferences.shared.preferredTranslationType == .useDeepl else { return nil }
 
     return readValue()
   }
@@ -35,7 +35,11 @@ public enum DeepLUserAPIHandler {
   }
 
   public static func deactivateToggleIfNoKey() {
-    UserPreferences.shared.alwaysUseDeepl = shouldAlwaysUseDeepl
+    if UserPreferences.shared.preferredTranslationType == .useDeepl {
+      if readValue() == nil {
+        UserPreferences.shared.preferredTranslationType = .useServerIfPossible
+      }
+    }
   }
 
   public static var shouldAlwaysUseDeepl: Bool {

Packages/Env/Sources/Env/TranslationType.swift

@@ -0,0 +1,5 @@
+public enum TranslationType: String, CaseIterable {
+  case useServerIfPossible
+  case useDeepl
+  case useApple
+}

Packages/Env/Sources/Env/UserPreferences.swift

@@ -185,11 +185,7 @@ import SwiftUI
     }
   }
 
-  public var alwaysUseDeepl: Bool {
-    didSet {
-      storage.alwaysUseDeepl = alwaysUseDeepl
-    }
-  }
+  public var preferredTranslationType: TranslationType
 
   public var userDeeplAPIFree: Bool {
     didSet {
@@ -482,7 +478,7 @@ import SwiftUI
     appDefaultPostsSensitive = storage.appDefaultPostsSensitive
     appRequireAltText = storage.appRequireAltText
     autoPlayVideo = storage.autoPlayVideo
-    alwaysUseDeepl = storage.alwaysUseDeepl
+    preferredTranslationType = .useServerIfPossible
     userDeeplAPIFree = storage.userDeeplAPIFree
     autoDetectPostLanguage = storage.autoDetectPostLanguage
     inAppBrowserReaderView = storage.inAppBrowserReaderView

Packages/StatusKit/Sources/StatusKit/Row/StatusRowViewModel.swift

@@ -31,6 +31,15 @@ import SwiftUI
   var translation: Translation?
   var isLoadingTranslation: Bool = false
   var showDeleteAlert: Bool = false
+  var showAppleTranslation = false
+  var preferredTranslationType = TranslationType.useServerIfPossible {
+    didSet {
+      if oldValue != preferredTranslationType {
+        translation = nil
+        showAppleTranslation = false
+      }
+    }
+  }
 
   private(set) var actionsAccountsFetched: Bool = false
   var favoriters: [Account] = []
@@ -297,10 +306,16 @@ import SwiftUI
   }
 
   func translate(userLang: String) async {
+    updatePreferredTranslation()
+    if preferredTranslationType == .useApple {
+      showAppleTranslation = true
+      return
+    }
+
     withAnimation {
       isLoadingTranslation = true
     }
-    if !alwaysTranslateWithDeepl {
+    if preferredTranslationType != .useDeepl {
       do {
         // We first use instance translation API if available.
         let translation: Translation = try await client.post(endpoint: Statuses.translate(id: finalStatus.id,
@@ -342,8 +357,14 @@ import SwiftUI
     DeepLUserAPIHandler.readIfAllowed()
   }
 
-  var alwaysTranslateWithDeepl: Bool {
-    DeepLUserAPIHandler.shouldAlwaysUseDeepl
+  func updatePreferredTranslation() {
+    if DeepLUserAPIHandler.shouldAlwaysUseDeepl {
+      preferredTranslationType = .useDeepl
+    } else if UserPreferences.shared.preferredTranslationType == .useApple {
+      preferredTranslationType = .useApple
+    } else {
+      preferredTranslationType = .useServerIfPossible
+    }
   }
 
   func fetchRemoteStatus() async -> Bool {

Packages/StatusKit/Sources/StatusKit/Row/Subviews/StatusRowTranslateView.swift

@@ -2,6 +2,7 @@ import DesignSystem
 import Env
 import Models
 import SwiftUI
+import Translation
 
 @MainActor
 struct StatusRowTranslateView: View {
@@ -35,7 +36,8 @@ struct StatusRowTranslateView: View {
     }
   }
 
-  var body: some View {
+  @ViewBuilder
+  var translateButton: some View {
     if !isInCaptureMode,
        !isCompact,
        let userLang = preferences.serverPreferences?.postLanguage,
@@ -54,8 +56,26 @@ struct StatusRowTranslateView: View {
       }
       .buttonStyle(.borderless)
     }
+  }
 
-    if let translation = viewModel.translation, !viewModel.isLoadingTranslation {
+  @ViewBuilder
+  var generalTranslateButton: some View {
+    if #available(iOS 17.4, *) {
+      @Bindable var viewModel = viewModel
+      translateButton
+        .translationPresentation(isPresented: $viewModel.showAppleTranslation, text: viewModel.finalStatus.content.asRawText)
+    } else {
+      translateButton
+    }
+  }
+
+  var body: some View {
+    generalTranslateButton
+      .onChange(of: preferences.preferredTranslationType) { _, _ in
+        _ = viewModel.updatePreferredTranslation()
+      }
+
+    if let translation = viewModel.translation, !viewModel.isLoadingTranslation, preferences.preferredTranslationType != .useApple {
       GroupBox {
         VStack(alignment: .leading, spacing: 4) {
           Text(translation.content.asSafeMarkdownAttributedString)