Report string when mention url decoding fails

I'm not sure how this can happen (possibly if the user dismissed the
compose screen while the status was being posted? but I haven't been
able to reproduce that), but guard against it since it's causing crashes

Packages/ComposeUI/Sources/ComposeUI/Controllers/ComposeController.swift

@@ -58,7 +58,7 @@ public final class ComposeController: ViewController {
     private var isDisappearing = false
     private var userConfirmedDelete = false
     
-    var isPosting: Bool {
+    public var isPosting: Bool {
         poster != nil
     }
     
@@ -424,6 +424,7 @@ public final class ComposeController: ViewController {
                     // otherwise all Buttons in the nav bar are made semibold
                     .font(.system(size: 17, weight: .regular))
             }
+            .disabled(controller.isPosting)
             .confirmationDialog("Are you sure?", isPresented: $controller.isShowingSaveDraftSheet) {
                 // edit drafts can't be saved
                 if draft.editedStatusID == nil {

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() {
     }
     

Packages/Pachyderm/Sources/Pachyderm/Model/Mention.swift

@@ -21,7 +21,12 @@ public struct Mention: Codable, Sendable {
         self.username = try container.decode(String.self, forKey: .username)
         self.acct = try container.decode(String.self, forKey: .acct)
         self.id = try container.decode(String.self, forKey: .id)
-        self.url = try container.decode(WebURL.self, forKey: .url)
+        do {
+            self.url = try container.decode(WebURL.self, forKey: .url)
+        } catch {
+            let s = try? container.decode(String.self, forKey: .url)
+            throw DecodingError.dataCorruptedError(forKey: .url, in: container, debugDescription: "Could not decode URL '\(s ?? "<failed to decode string>")'")
+        }
     }
     
     public init(url: WebURL, username: String, acct: String, id: String) {

Tusker/Screens/Compose/ComposeHostingController.swift

@@ -88,7 +88,7 @@ class ComposeHostingController: UIHostingController<ComposeHostingController.Vie
         config.contentType = Preferences.shared.statusContentType
         config.requireAttachmentDescriptions = Preferences.shared.requireAttachmentDescriptions
         
-        config.dismiss = { [unowned self] in self.dismiss(mode: $0) }
+        config.dismiss = { [weak self] in self?.dismiss(mode: $0) }
         config.presentAssetPicker = { [unowned self] in self.presentAssetPicker(completion: $0) }
         config.presentDrawing = { [unowned self] in self.presentDrawing($0, completion: $1) }
         config.userActivityForDraft = { [unowned self] in
@@ -144,7 +144,9 @@ class ComposeHostingController: UIHostingController<ComposeHostingController.Vie
     // MARK: Duckable
     
     func duckableViewControllerShouldDuck() -> DuckAttemptAction {
-        if controller.draft.hasContent {
+        if controller.isPosting {
+            return .block
+        } else if controller.draft.hasContent {
             return .duck
         } else {
             return .dismiss

Tusker/Views/Toast/ToastConfiguration.swift

@@ -125,7 +125,7 @@ private func captureError(_ error: Client.Error, in mastodonController: Mastodon
         return
     }
     if let code = event.tags!["response_code"],
-       code == "401" || code == "403" || code == "404" || code == "502" || code == "503" {
+       code == "401" || code == "403" || code == "404" || code == "422" || code == "500" || code == "502" || code == "503" {
         return
     }
     switch mastodonController.instanceFeatures.instanceType {