WIP: media preview view

Session/Conversations/ConversationVC+Interaction.swift

@@ -1558,7 +1558,10 @@ extension ConversationVC:
     // MARK: - ContextMenuActionDelegate
     
     func info(_ cellViewModel: MessageViewModel) {
-        let mediaInfoVC = MediaInfoVC(attachments: (cellViewModel.attachments ?? []))
+        let mediaInfoVC = MediaInfoVC(
+            attachments: (cellViewModel.attachments ?? []),
+            isOutgoing: (cellViewModel.variant == .standardOutgoing)
+        )
         navigationController?.pushViewController(mediaInfoVC, animated: true)
     }
 

Session/Conversations/Message Cells/Content Views/MediaAlbumView.swift

@@ -28,8 +28,7 @@ public class MediaAlbumView: UIStackView {
                 MediaView(
                     mediaCache: mediaCache,
                     attachment: $0,
-                    isOutgoing: isOutgoing,
-                    maxMessageWidth: maxMessageWidth
+                    isOutgoing: isOutgoing
                 )
             }
 

Session/Conversations/Message Cells/Content Views/MediaView.swift

@@ -19,7 +19,6 @@ public class MediaView: UIView {
     private let mediaCache: NSCache<NSString, AnyObject>
     public let attachment: Attachment
     private let isOutgoing: Bool
-    private let maxMessageWidth: CGFloat
     private var loadBlock: (() -> Void)?
     private var unloadBlock: (() -> Void)?
 
@@ -48,13 +47,11 @@ public class MediaView: UIView {
     public required init(
         mediaCache: NSCache<NSString, AnyObject>,
         attachment: Attachment,
-        isOutgoing: Bool,
-        maxMessageWidth: CGFloat
+        isOutgoing: Bool
     ) {
         self.mediaCache = mediaCache
         self.attachment = attachment
         self.isOutgoing = isOutgoing
-        self.maxMessageWidth = maxMessageWidth
 
         super.init(frame: .zero)
 

Session/Media Viewing & Editing/MediaInfoVC+MediaPreviewView.swift

@@ -8,20 +8,48 @@ extension MediaInfoVC {
     final class MediaPreviewView: UIView {
         private static let cornerRadius: CGFloat = 8
         
+        private let mediaCache: NSCache<NSString, AnyObject>
         private let attachment: Attachment
+        private let isOutgoing: Bool
         
         // MARK: - UI
         
+        private lazy var mediaView: MediaView = {
+            let result: MediaView = MediaView.init(
+                mediaCache: mediaCache,
+                attachment: attachment,
+                isOutgoing: isOutgoing
+            )
+            
+            return result
+        }()
+        
         private lazy var fullScreenButton: UIButton = {
             let result: UIButton = UIButton(type: .custom)
+            result.setImage(
+                UIImage(systemName: "arrow.up.left.and.arrow.down.right")?
+                    .withRenderingMode(.alwaysTemplate),
+                for: .normal
+            )
+            result.themeTintColor = .textPrimary
+            result.backgroundColor = .init(white: 0, alpha: 0.4)
+            result.layer.cornerRadius = 14
+            result.set(.width, to: 28)
+            result.set(.height, to: 28)
             
             return result
         }()
         
         // MARK: - Lifecycle
         
-        init(attachment: Attachment) {
+        init(
+            mediaCache: NSCache<NSString, AnyObject>,
+            attachment: Attachment,
+            isOutgoing: Bool
+        ) {
+            self.mediaCache = mediaCache
             self.attachment = attachment
+            self.isOutgoing = isOutgoing
             
             super.init(frame: CGRect.zero)
             self.accessibilityLabel = "Media info"
@@ -37,7 +65,17 @@ extension MediaInfoVC {
         }
 
         private func setUpViewHierarchy() {
+            set(.width, to: 293)
+            set(.height, to: 293)
             
+            addSubview(mediaView)
+            mediaView.pin(to: self)
+            
+            addSubview(fullScreenButton)
+            fullScreenButton.pin(.trailing, to: .trailing, of: self, withInset: -Values.smallSpacing)
+            fullScreenButton.pin(.bottom, to: .bottom, of: self, withInset: -Values.smallSpacing)
+            
+            mediaView.loadMedia()
         }
         
     }

Session/Media Viewing & Editing/MediaInfoVC.swift

@@ -7,10 +7,19 @@ import SessionUtilitiesKit
 final class MediaInfoVC: BaseVC {
     
     private let attachments: [Attachment]
+    private let isOutgoing: Bool
+    
+    // FIXME: Would be good to create a Swift-based cache and replace this
+    lazy var mediaCache: NSCache<NSString, AnyObject> = {
+        let result = NSCache<NSString, AnyObject>()
+        result.countLimit = 40
+        return result
+    }()
     
     // MARK: - Initialization
     
-    init(attachments: [Attachment]) {
+    init(attachments: [Attachment], isOutgoing: Bool) {
+        self.isOutgoing = isOutgoing
         self.attachments = attachments
         super.init(nibName: nil, bundle: nil)
     }
@@ -31,9 +40,18 @@ final class MediaInfoVC: BaseVC {
         self.title = "Message Info"
         
         attachments.forEach {
+            let mediaPreviewView: MediaPreviewView = MediaPreviewView(
+                mediaCache: mediaCache,
+                attachment: $0,
+                isOutgoing: isOutgoing)
             let mediaInfoView: MediaInfoView = MediaInfoView(attachment: $0)
-            self.view.addSubview(mediaInfoView)
-            mediaInfoView.center(in: self.view)
+            
+            let stackView: UIStackView = UIStackView(arrangedSubviews: [ mediaPreviewView, mediaInfoView ])
+            stackView.axis = .vertical
+            stackView.spacing = Values.largeSpacing
+            
+            self.view.addSubview(stackView)
+            stackView.center(in: self.view)
         }
     }
 }