relays: fix crash in new RelayPicView

damus/Views/Relays/RelayPicView.swift

@@ -9,43 +9,55 @@ import SwiftUI
 import Kingfisher
 import TLDExtract
 
+struct FailedRelayImage: View {
+    let url: URL?
+
+    var body: some View {
+        let abbrv = String(url?.hostname?.first?.uppercased() ?? "R")
+        Text("\(abbrv)")
+            .font(.system(size: 40, weight: .bold))
+    }
+}
+
 struct InnerRelayPicView: View {
     let url: URL?
     let size: CGFloat
     let highlight: Highlight
     let disable_animation: Bool
     @State var failedImage: Bool = false
-
-    var Placeholder: some View {
-        RoundedRectangle(cornerRadius: 15)
-            .frame(width: size, height: size)
-            .foregroundColor(DamusColors.adaptableGrey)
-            .overlay(RoundedRectangle(cornerRadius: 15).stroke(highlight_color(highlight), lineWidth: pfp_line_width(highlight)))
-            .padding(2)
+
+    func Placeholder(url: URL?) -> some View {
+        ZStack {
+            RoundedRectangle(cornerRadius: 15)
+                .frame(width: size, height: size)
+                .foregroundColor(DamusColors.adaptableGrey)
+                .overlay(RoundedRectangle(cornerRadius: 15).stroke(highlight_color(highlight), lineWidth: pfp_line_width(highlight)))
+                .padding(2)
+
+            FailedRelayImage(url: url)
+        }
     }
 
     var body: some View {
         ZStack {
             Color(uiColor: .secondarySystemBackground)
 
-            KFAnimatedImage(url)
-                .imageContext(.pfp, disable_animation: disable_animation)
-                .onFailure({ result in
-                    failedImage = true
-                })
-                .cancelOnDisappear(true)
-                .configure { view in
-                    view.framePreloadCount = 3
-                }
-                .placeholder { _ in
-                    Placeholder
-                }
-                .scaledToFit()
-
-            if failedImage {
-                let abbrv = String(url?.hostname?.first?.uppercased() ?? "R")
-                Text("\(abbrv)")
-                    .font(.system(size: 40, weight: .bold))
+            if let url {
+                KFAnimatedImage(url)
+                    .imageContext(.pfp, disable_animation: disable_animation)
+                    .onFailure { _ in
+                        failedImage = true
+                    }
+                    .cancelOnDisappear(true)
+                    .configure { view in
+                        view.framePreloadCount = 3
+                    }
+                    .placeholder { _ in
+                        Placeholder(url: url)
+                    }
+                    .scaledToFit()
+            } else {
+                FailedRelayImage(url: nil)
             }
         }
         .frame(width: size, height: size)
@@ -68,23 +80,24 @@ struct RelayPicView: View {
         self.highlight = highlight
         self.disable_animation = disable_animation
     }
+
+    var relay_url: URL? {
+        get_relay_url(relay: relay, icon: icon)
+    }
 
     var body: some View {
-        InnerRelayPicView(url: get_relay_url(relay: relay, icon: icon), size: size, highlight: highlight, disable_animation: disable_animation)
+        InnerRelayPicView(url: relay_url, size: size, highlight: highlight, disable_animation: disable_animation)
     }
 }
 
-func get_relay_url(relay: String, icon: String?) -> URL {
+func get_relay_url(relay: String, icon: String?) -> URL? {
     let extractor = TLDExtract()
     var favicon = relay + "/favicon.ico"
     if let parseRelay: TLDResult = extractor.parse(relay) {
         favicon = "https://" + (parseRelay.rootDomain ?? relay) + "/favicon.ico"
     }
     let pic = icon ?? favicon
-    if let url = URL(string: pic) {
-        return url
-    }
-    return URL(string: "")!
+    return URL(string: pic)
 }
 
 struct RelayPicView_Previews: PreviewProvider {