Add rudimentary support for audio attachments

Closes #7

Tusker/Screens/Gallery/GalleryViewController.swift

@@ -52,7 +52,7 @@ class GalleryViewController: UIPageViewController, UIPageViewControllerDataSourc
             switch $0.kind {
             case .image:
                 return AttachmentViewController(attachment: $0)
-            case .video:
+            case .video, .audio:
                 let vc = AVPlayerViewController()
                 vc.player = AVPlayer(url: $0.url)
                 return vc

Tusker/Views/Attachments/AttachmentView.swift

@@ -19,7 +19,7 @@ class AttachmentView: UIImageView, GIFAnimatable {
     
     weak var delegate: AttachmentViewDelegate?
 
-    var playImageView: UIImageView!
+    var playImageView: UIImageView?
     
     var attachment: Attachment!
     var index: Int!
@@ -54,25 +54,21 @@ class AttachmentView: UIImageView, GIFAnimatable {
         isUserInteractionEnabled = true
         addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(imagePressed)))
         
-        playImageView = UIImageView(image: UIImage(systemName: "play.circle.fill"))
-        playImageView.translatesAutoresizingMaskIntoConstraints = false
-        addSubview(playImageView)
-        NSLayoutConstraint.activate([
-            playImageView.widthAnchor.constraint(equalToConstant: 50),
-            playImageView.heightAnchor.constraint(equalToConstant: 50),
-            playImageView.centerXAnchor.constraint(equalTo: centerXAnchor),
-            playImageView.centerYAnchor.constraint(equalTo: centerYAnchor)
-        ])
     }
     
     func loadAttachment() {
+        guard AttachmentsContainerView.supportedAttachmentTypes.contains(attachment.kind) else {
+            preconditionFailure("invalid attachment type")
+        }
         switch attachment.kind {
         case .image:
             loadImage()
         case .video:
             loadVideo()
+        case .audio:
+            loadAudio()
         default:
-            fatalError()
+            preconditionFailure("invalid attachment type")
         }
     }
     
@@ -89,8 +85,6 @@ class AttachmentView: UIImageView, GIFAnimatable {
                 }
             }
         }
-        
-        playImageView.isHidden = true
     }
     
     func loadVideo() {
@@ -106,7 +100,36 @@ class AttachmentView: UIImageView, GIFAnimatable {
             }
         }
         
-        playImageView.isHidden = false
+        let playImageView = UIImageView(image: UIImage(systemName: "play.circle.fill"))
+        playImageView.translatesAutoresizingMaskIntoConstraints = false
+        addSubview(playImageView)
+        NSLayoutConstraint.activate([
+            playImageView.widthAnchor.constraint(equalToConstant: 50),
+            playImageView.heightAnchor.constraint(equalToConstant: 50),
+            playImageView.centerXAnchor.constraint(equalTo: centerXAnchor),
+            playImageView.centerYAnchor.constraint(equalTo: centerYAnchor),
+        ])
+    }
+    
+    func loadAudio() {
+        let label = UILabel()
+        label.text = "Audio Only"
+        let playImageView = UIImageView(image: UIImage(systemName: "play.circle.fill"))
+        let stack = UIStackView(arrangedSubviews: [
+            label,
+            playImageView
+        ])
+        stack.translatesAutoresizingMaskIntoConstraints = false
+        stack.axis = .vertical
+        stack.spacing = 8
+        stack.alignment = .center
+        addSubview(stack)
+        NSLayoutConstraint.activate([
+            stack.centerXAnchor.constraint(equalTo: centerXAnchor),
+            stack.centerYAnchor.constraint(equalTo: centerYAnchor),
+            playImageView.widthAnchor.constraint(equalToConstant: 50),
+            playImageView.heightAnchor.constraint(equalToConstant: 50),
+        ])
     }
     
     override func display(_ layer: CALayer) {

Tusker/Views/Attachments/AttachmentsContainerView.swift

@@ -11,6 +11,8 @@ import Pachyderm
 
 class AttachmentsContainerView: UIView {
 
+    static let supportedAttachmentTypes = [Attachment.Kind.image, .video, .audio]
+    
     weak var delegate: AttachmentViewDelegate?
     
     var statusID: String!
@@ -47,7 +49,7 @@ class AttachmentsContainerView: UIView {
     
     func updateUI(status: Status) {
         self.statusID = status.id
-        attachments = status.attachments.filter { $0.kind == .image || $0.kind == .video }
+        attachments = status.attachments.filter { AttachmentsContainerView.supportedAttachmentTypes.contains($0.kind) }
         
         attachmentViews.allObjects.forEach { $0.removeFromSuperview() }
         attachmentViews.removeAllObjects()