Separate logic for starting network monitor

Author: itsmeichigo

WooCommerce/Classes/Tools/Connectivity/ConnectivityObserver.swift

@@ -3,8 +3,11 @@ import Foundation
 /// Interface for the observing connectivity
 ///
 protocol ConnectivityObserver {
-    /// Starts the observer with a listener.
-    func startObserving(listener: @escaping (ConnectivityStatus) -> Void)
+    /// Starts the connectivity observer.
+    func startObserving()
+
+    /// Updates callback block for when connectivity changes.
+    func updateListener(_ listener: @escaping (ConnectivityStatus) -> Void)
 
     /// Stops the observer.
     func stopObserving()

WooCommerce/Classes/Tools/Connectivity/DefaultConnectivityObserver.swift

@@ -12,15 +12,21 @@ final class DefaultConnectivityObserver: ConnectivityObserver {
         self.networkMonitor = networkMonitor
     }
 
-    func startObserving(listener: @escaping (ConnectivityStatus) -> Void) {
+    func startObserving() {
+        networkMonitor.start(queue: observingQueue)
+    }
+
+    func updateListener(_ listener: @escaping (ConnectivityStatus) -> Void) {
+        if networkMonitor.pathUpdateHandler == nil {
+            startObserving()
+        }
         networkMonitor.pathUpdateHandler = { [weak self] path in
             guard let self = self else { return }
             let connectivityStatus = self.connectivityStatus(from: path)
             DispatchQueue.main.async {
                 listener(connectivityStatus)
             }
         }
-        networkMonitor.start(queue: observingQueue)
     }
 
     func stopObserving() {