Update ServerPresenter.kt

app/src/main/java/chat/rocket/android/authentication/server/presentation/ServerPresenter.kt

 package chat.rocket.android.authentication.server.presentation
 
+import android.content.Context
+import chat.rocket.android.R
 import chat.rocket.android.authentication.presentation.AuthenticationNavigator
+import chat.rocket.android.core.lifecycle.CancelStrategy
+import chat.rocket.android.helper.NetworkHelper
+import chat.rocket.android.util.launchUI
 import javax.inject.Inject
 
 class ServerPresenter @Inject constructor(private val view: ServerView,
+                                          private val strategy: CancelStrategy,
                                           private val navigator: AuthenticationNavigator) {
 
-    fun login(server: String) {
+    fun login(context: Context, server: String) {
+        launchUI(strategy) {
+            if (NetworkHelper.hasInternetAccess()) {
+                view.showLoading()
+
                 // TODO - validate server URL and get server settings and info before going to Login screen
+
+                view.hideLoading()
                 navigator.toLogin(server)
+            } else {
+                view.showMessage(context.getString(R.string.msg_no_internet_connection))
+            }
+        }
     }
 }
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