Add support for rendering html post content

MobileFort/MobileFort/PostView.swift

@@ -7,6 +7,37 @@ extension String {
     }
 }
 
+/// A custom view to use NSAttributedString in SwiftUI
+struct AttributedText: UIViewRepresentable {
+    func updateUIView(_ uiView: UILabel, context: Context) {
+        
+    }
+    
+    let html: String
+    
+    init(_ html: String) {
+        self.html = html
+    }
+    
+    public func makeUIView(context: UIViewRepresentableContext<AttributedText>) -> UILabel {
+        let textView = UILabel()
+        textView.backgroundColor = .clear
+        textView.lineBreakMode = .byWordWrapping
+        textView.numberOfLines = 0
+        textView.lineBreakMode = .byWordWrapping
+        textView.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
+
+        DispatchQueue.main.async {
+            let data = Data(self.html.utf8)
+            if let attributedString = try? NSAttributedString(data: data, options: [.documentType: NSAttributedString.DocumentType.html], documentAttributes: nil) {
+                textView.attributedText = attributedString
+            }
+        }
+                
+        return textView
+    }
+}
+
 struct PostView: View {
     let post: Post
     
@@ -53,7 +84,7 @@ struct PostView: View {
                     }
                 }
                 
-                Text(post.getContent())
+                AttributedText(post.getContent()).frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity)
             }
         }.frame(maxWidth: .infinity)
     }