Start adding sensitive media hiding

Tusker/Views/Attachments/AttachmentsContainerView.swift

@@ -13,8 +13,26 @@ class AttachmentsContainerView: UIView {
 
     var delegate: AttachmentViewDelegate?
     
+    var statusID: String!
+    
     let attachmentViews: NSHashTable<AttachmentView> = .weakObjects()
     
+    var blurView: UIVisualEffectView?
+    var hideButton: UIButton?
+    var contentHidden: Bool! {
+        didSet {
+            guard let blurView = blurView,
+                let hideButton = hideButton else { return }
+            
+            blurView.alpha = contentHidden ? 0 : 1
+            hideButton.alpha = contentHidden ? 1 : 0
+            UIView.animate(withDuration: 0.2) {
+                blurView.alpha = self.contentHidden ? 1 : 0
+                hideButton.alpha = self.contentHidden ? 0 : 1
+            }
+        }
+    }
+    
     override func awakeFromNib() {
         super.awakeFromNib()
         
@@ -28,6 +46,7 @@ class AttachmentsContainerView: UIView {
     // MARK: - User Interaface
     
     func updateUI(status: Status) {
+        self.statusID = status.id
         let attachments = status.attachments.filter { $0.kind == .image }
         
         attachmentViews.removeAllObjects()
@@ -38,10 +57,10 @@ class AttachmentsContainerView: UIView {
             
             switch attachments.count {
             case 1:
-                makeMainView(createAttachmentView(attachments[0]))
+                fillView(createAttachmentView(attachments[0]))
             case 2:
                 let left = createAttachmentView(attachments[0])
-                makeMainView(createAttachmentsStack(axis: .horizontal, arrangedSubviews: [
+                fillView(createAttachmentsStack(axis: .horizontal, arrangedSubviews: [
                     left,
                     createAttachmentView(attachments[1])
                 ]))
@@ -51,7 +70,7 @@ class AttachmentsContainerView: UIView {
             case 3:
                 let left = createAttachmentView(attachments[0])
                 let topRight = createAttachmentView(attachments[1])
-                makeMainView(createAttachmentsStack(axis: .horizontal, arrangedSubviews: [
+                fillView(createAttachmentsStack(axis: .horizontal, arrangedSubviews: [
                     left,
                     createAttachmentsStack(axis: .vertical, arrangedSubviews: [
                         topRight,
@@ -69,7 +88,7 @@ class AttachmentsContainerView: UIView {
                     createAttachmentView(attachments[2])
                 ])
                 let topRight = createAttachmentView(attachments[1])
-                makeMainView(createAttachmentsStack(axis: .horizontal, arrangedSubviews: [
+                fillView(createAttachmentsStack(axis: .horizontal, arrangedSubviews: [
                     left,
                     createAttachmentsStack(axis: .vertical, arrangedSubviews: [
                         topRight,
@@ -87,6 +106,12 @@ class AttachmentsContainerView: UIView {
         } else {
             self.isHidden = true
         }
+        
+        if status.sensitive {
+            contentHidden = true
+            createBlurView()
+            createHideButton()
+        }
     }
     
     private func createAttachmentView(_ attachment: Attachment) -> AttachmentView {
@@ -105,16 +130,108 @@ class AttachmentsContainerView: UIView {
         return stack
     }
     
-    private func makeMainView(_ view: UIView) {
-        addSubview(view)
+    private func createBlurView() {
+        let blur = UIBlurEffect(style: .dark)
+        let blurView = UIVisualEffectView(effect: blur)
+        //            let blurView = UIVisualEffectView(frame: bounds)
+        blurView.effect = blur
+        blurView.translatesAutoresizingMaskIntoConstraints = false
+        fillView(blurView)
+        //            addSubview(blurView)
+        let vibrancyView = UIVisualEffectView(effect: UIVibrancyEffect(blurEffect: blur, style: .label))
+        //            let vibrancyView = UIVisualEffectView(frame: blurView.bounds)
+        //            vibrancyView.effect = UIVibrancyEffect(blurEffect: blur, style: .label)
+        vibrancyView.translatesAutoresizingMaskIntoConstraints = false
+        fillView(vibrancyView, in: blurView.contentView)
+        //            addSubview(vibrancyView)
+        blurView.contentView.addSubview(vibrancyView)
+        
+        let image = UIImage(systemName: "eye")!
+        let imageView = UIImageView(image: image)
+        imageView.translatesAutoresizingMaskIntoConstraints = false
+        let label = UILabel()
+        label.text = "Sensitive Content"
+        let stack = UIStackView(arrangedSubviews: [
+            imageView,
+            label
+            ])
+        stack.axis = .vertical
+        stack.alignment = .center
+        stack.translatesAutoresizingMaskIntoConstraints = false
+        vibrancyView.contentView.addSubview(stack)
         NSLayoutConstraint.activate([
-            view.leadingAnchor.constraint(equalTo: leadingAnchor),
-            view.trailingAnchor.constraint(equalTo: trailingAnchor),
-            view.topAnchor.constraint(equalTo: topAnchor),
-            view.bottomAnchor.constraint(equalTo: bottomAnchor)
+            imageView.widthAnchor.constraint(equalTo: imageView.heightAnchor, multiplier: image.size.width / image.size.height),
+            imageView.widthAnchor.constraint(equalTo: widthAnchor, multiplier: 0.2),
+            stack.centerXAnchor.constraint(equalTo: centerXAnchor),
+            stack.centerYAnchor.constraint(equalTo: centerYAnchor),
+            stack.widthAnchor.constraint(equalTo: widthAnchor)
+        ])
+        
+        self.blurView = blurView
+        
+        blurView.isUserInteractionEnabled = true
+        blurView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(blurViewTapped)))
+    }
+    
+    private func createHideButton() {
+        let hideButton = UIButton()
+        hideButton.translatesAutoresizingMaskIntoConstraints = false
+        hideButton.alpha = 0
+        hideButton.layer.cornerRadius = 2
+        hideButton.layer.masksToBounds = true
+//        hideButton.backgroundColor = tintColor
+//        hideButton.tintColor = 
+        hideButton.setImage(UIImage(systemName: "eye.slash.fill"), for: .normal)
+        hideButton.addTarget(self, action: #selector(hideButtonTapped), for: .touchUpInside)
+        
+        addSubview(hideButton)
+        NSLayoutConstraint.activate([
+            hideButton.topAnchor.constraint(equalTo: topAnchor, constant: 8),
+            hideButton.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 8)
+        ])
+        
+        self.hideButton = hideButton
+    }
+    
+    private func fillView(_ view: UIView, in parentView: UIView? = nil) {
+        let parentView = parentView ?? self
+        parentView.addSubview(view)
+        NSLayoutConstraint.activate([
+            view.leadingAnchor.constraint(equalTo: parentView.leadingAnchor),
+            view.trailingAnchor.constraint(equalTo: parentView.trailingAnchor),
+            view.topAnchor.constraint(equalTo: parentView.topAnchor),
+            view.bottomAnchor.constraint(equalTo: parentView.bottomAnchor)
         ])
     }
     
+    // MARK: - Interaction
+    
+    @objc func blurViewTapped() {
+        contentHidden = false
+    }
+    
+    @objc func hideButtonTapped() {
+        contentHidden = true
+    }
+    
+    @objc func showSensitiveContent() {
+        guard let blurView = blurView else { return }
+        
+        blurView.alpha = 1
+        UIView.animate(withDuration: 0.2) {
+            blurView.alpha = 0
+        }
+    }
+    
+    @objc func hideSensitiveContent() {
+        guard let blurView = self.blurView else { return }
+        
+        blurView.alpha = 0
+        UIView.animate(withDuration: 0.2) {
+            blurView.alpha = 1
+        }
+    }
+
 }
 
 fileprivate extension UIView {