feature: add visibility indicator for post

Mastodon/Diffiable/Section/StatusSection.swift

@@ -178,6 +178,20 @@ extension StatusSection {
         // set text
         cell.statusView.activeTextLabel.configure(content: (status.reblog ?? status).content)
         
+        // set visibility
+        if let visibility = (status.reblog ?? status).visibility {
+            cell.statusView.updateVisibility(visibility: visibility)
+            
+            cell.statusView.revealContentWarningButton.publisher(for: \.isHidden)
+                .receive(on: DispatchQueue.main)
+                .sink { [weak cell] isHidden in
+                    cell?.statusView.visibilityImageView.isHidden = !isHidden
+                }
+                .store(in: &cell.disposeBag)
+        } else {
+            cell.statusView.visibilityImageView.isHidden = true
+        }
+        
         // prepare media attachments
         let mediaAttachments = Array((status.reblog ?? status).mediaAttachments ?? []).sorted { $0.index.compare($1.index) == .orderedAscending }
         

Mastodon/Scene/Compose/View/ComposeToolbarView.swift

@@ -181,6 +181,15 @@ extension ComposeToolbarView {
             }
         }
         
+        func imageNameForTimeline() -> String {
+            switch self {
+            case .public: return "person.3"
+            case .unlisted: return "eye.slash"
+            case .private: return "person.crop.circle.badge.plus"
+            case .direct: return "at"
+            }
+        }
+        
         var visibility: Mastodon.Entity.Status.Visibility {
             switch self {
             case .public: return .public

Mastodon/Scene/Share/View/Content/StatusView.swift

@@ -126,6 +126,13 @@ final class StatusView: UIView {
         return button
     }()
     
+    let visibilityImageView: UIImageView = {
+        let imageView = UIImageView()
+        imageView.tintColor = Asset.Colors.Label.secondary.color
+        imageView.contentMode = .scaleAspectFit
+        return imageView
+    }()
+    
     let statusContainerStackView = UIStackView()    
     let statusMosaicImageViewContainer = MosaicImageViewContainer()
     
@@ -321,6 +328,10 @@ extension StatusView {
         authorContainerStackView.addArrangedSubview(revealContentWarningButton)
         revealContentWarningButton.setContentHuggingPriority(.required - 2, for: .horizontal)
         
+        // visibility ImageView
+        authorContainerStackView.addArrangedSubview(visibilityImageView)
+        visibilityImageView.setContentHuggingPriority(.required - 2, for: .horizontal)
+        
         authorContainerStackView.translatesAutoresizingMaskIntoConstraints = false
         authorContainerView.addSubview(authorContainerStackView)
         NSLayoutConstraint.activate([
@@ -483,6 +494,11 @@ extension StatusView {
         // TODO: a11y
     }
     
+    func updateVisibility(visibility: String) {
+        guard let visibility = ComposeToolbarView.VisibilitySelectionType(rawValue: visibility) else { return }
+        visibilityImageView.image = UIImage(systemName: visibility.imageNameForTimeline(), withConfiguration: UIImage.SymbolConfiguration(pointSize: 13, weight: .regular))
+    }
+    
 }
 
 extension StatusView {