Disallow posting direct messages on Pixelfed

Packages/ComposeUI/Sources/ComposeUI/Controllers/ToolbarController.swift

@@ -11,9 +11,6 @@ import TuskerComponents
 
 class ToolbarController: ViewController {
     static let height: CGFloat = 44
-    private static let visibilityOptions: [MenuPicker<Pachyderm.Visibility>.Option] = Pachyderm.Visibility.allCases.map { vis in
-            .init(value: vis, title: vis.displayName, subtitle: vis.subtitle, image: UIImage(systemName: vis.unfilledImageName), accessibilityLabel: "Visibility: \(vis.displayName)")
-    }
     
     unowned let parent: ComposeController
     
@@ -56,7 +53,7 @@ class ToolbarController: ViewController {
                 HStack(spacing: 0) {
                     cwButton
                     
-                    MenuPicker(selection: $draft.visibility, options: ToolbarController.visibilityOptions, buttonStyle: .iconOnly)
+                    MenuPicker(selection: $draft.visibility, options: visibilityOptions, buttonStyle: .iconOnly)
                     // the button has a bunch of extra space by default, but combined with what we add it's too much
                         .padding(.horizontal, -8)
                         .disabled(draft.editedStatusID != nil)
@@ -121,6 +118,18 @@ class ToolbarController: ViewController {
                 .hoverEffect()
         }
         
+        private var visibilityOptions: [MenuPicker<Pachyderm.Visibility>.Option] {
+            let visibilities: [Pachyderm.Visibility]
+            if !controller.parent.mastodonController.instanceFeatures.composeDirectStatuses {
+                visibilities = [.public, .unlisted, .private]
+            } else {
+                visibilities = Pachyderm.Visibility.allCases
+            }
+            return visibilities.map { vis in
+                    .init(value: vis, title: vis.displayName, subtitle: vis.subtitle, image: UIImage(systemName: vis.unfilledImageName), accessibilityLabel: "Visibility: \(vis.displayName)")
+            }
+        }
+        
         private var localOnlyPicker: some View {
             let domain = composeController.mastodonController.accountInfo!.instanceURL.host!
             return MenuPicker(selection: $draft.localOnly, options: [

Packages/InstanceFeatures/Sources/InstanceFeatures/InstanceFeatures.swift

@@ -147,6 +147,14 @@ public class InstanceFeatures: ObservableObject {
         instanceType.isPleroma(.akkoma(nil))
     }
     
+    public var composeDirectStatuses: Bool {
+        if case .pixelfed = instanceType {
+            return false
+        } else {
+            return true
+        }
+    }
+    
     public init() {
     }