relays: add some ping/pong and connection logs

need this for debugging connection issues

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

damus/Nostr/RelayConnection.swift

@@ -46,9 +46,10 @@ final class RelayConnection: ObservableObject {
             
             if err == nil {
                 self.last_pong = .now
+                Log.info("Got pong from '%s'", for: .networking, self.relay_url.absoluteString)
                 self.log?.add("Successful ping")
             } else {
-                print("pong failed, reconnecting \(self.relay_url.id)")
+                Log.info("Ping failed, reconnecting to '%s'", for: .networking, self.relay_url.absoluteString)
                 self.isConnected = false
                 self.isConnecting = false
                 self.reconnect_with_backoff()
@@ -126,7 +127,7 @@ final class RelayConnection: ObservableObject {
             self.receive(message: message)
         case .disconnected(let closeCode, let reason):
             if closeCode != .normalClosure {
-                print("⚠️ Warning: RelayConnection (\(self.relay_url)) closed with code \(closeCode), reason: \(String(describing: reason))")
+                Log.error("⚠️ Warning: RelayConnection (%d) closed with code: %s", for: .networking, String(describing: closeCode), String(describing: reason))
             }
             DispatchQueue.main.async {
                 self.isConnected = false
@@ -134,7 +135,7 @@ final class RelayConnection: ObservableObject {
                 self.reconnect()
             }
         case .error(let error):
-            print("⚠️ Warning: RelayConnection (\(self.relay_url)) error: \(error)")
+            Log.error("⚠️ Warning: RelayConnection (%s) error: %s", for: .networking, self.relay_url.absoluteString, error.localizedDescription)
             let nserr = error as NSError
             if nserr.domain == NSPOSIXErrorDomain && nserr.code == 57 {
                 // ignore socket not connected?

damus/Nostr/RelayPool.swift

@@ -89,6 +89,7 @@ class RelayPool {
     }
     
     func ping() {
+        Log.info("Pinging %d relays", for: .networking, relays.count)
         for relay in relays {
             relay.connection.ping()
         }

damus/Util/Log.swift

@@ -13,6 +13,7 @@ enum LogCategory: String {
     case nav
     case render
     case storage
+    case networking
     case push_notifications
     case damus_purple
     case image_uploading