loading indicator

Signed-off-by: William Casarin <jb55@jb55.com>

damus/ContentView.swift

@@ -95,7 +95,12 @@ struct ContentView: View {
     var body: some View {
         NavigationView {
             VStack {
-                TopBar(selected: self.timeline)
+                if self.loading {
+                    ProgressView()
+                        .progressViewStyle(.circular)
+                        .padding([.bottom], 4)
+                }
+
                 ZStack {
                     if let pool = self.pool {
                         MainContent(pool: pool)
@@ -103,6 +108,7 @@ struct ContentView: View {
                     }
                     PostButtonContainer
                 }
+                TopBar(selected: self.timeline ?? .friends)
             }
             .navigationBarTitle("Damus", displayMode: .inline)
         }
@@ -220,14 +226,14 @@ struct ContentView: View {
 
             switch ev {
             case .connected:
+                self.loading = ((self.pool?.num_connecting ?? 0) > 0)
                 send_filters(relay_id: relay_id)
             case .error(let merr):
                 let desc = merr.debugDescription
                 if desc.contains("Software caused connection abort") {
                     self.pool?.reconnect(to: [relay_id])
                 }
-            case .disconnected:
-                self.pool?.reconnect(to: [relay_id])
+            case .disconnected: fallthrough
             case .cancelled:
                 self.pool?.reconnect(to: [relay_id])
             case .reconnectSuggested(let t):
@@ -248,10 +254,6 @@ struct ContentView: View {
                     return
                 }
 
-                if self.loading {
-                    self.loading = false
-                }
-
                 if has_events[ev.id] == nil {
                     has_events[ev.id] = ()
                     let last_k = last_event_of_kind[ev.kind]

damus/Nostr/RelayPool.swift

@@ -35,6 +35,10 @@ class RelayPool {
     var descriptors: [RelayDescriptor] {
         relays.map { $0.descriptor }
     }
+    
+    var num_connecting: Int {
+        return relays.reduce(0) { n, r in n + (r.connection.isConnecting ? 1 : 0) }
+    }
 
     func remove_handler(sub_id: String) {
         handlers = handlers.filter { $0.sub_id != sub_id }