PageViewModel: clearer message if no connection

app/src/main/AndroidManifest.xml

@@ -2,6 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="dev.lowrespalmtree.comet">
 
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.INTERNET" />
 
     <application

app/src/main/java/dev/lowrespalmtree/comet/MainActivity.kt

@@ -140,7 +140,9 @@ class MainActivity : AppCompatActivity(), ContentAdapter.ContentAdapterListen {
                 is PageViewModel.FailureEvent -> {
                     var message = event.details
                     if (!event.serverDetails.isNullOrEmpty())
-                        message += "\n\n" + "Server details: ${event.serverDetails}"
+                        message += "\n\nServer details: ${event.serverDetails}"
+                    if (!isConnectedToNetwork(this))
+                        message += "\n\nInternet may be inaccessible…"
                     alert(message, title = event.short)
                     updateState(PageViewModel.State.IDLE)
                 }

app/src/main/java/dev/lowrespalmtree/comet/NetUtils.kt

@@ -0,0 +1,11 @@
+package dev.lowrespalmtree.comet
+
+import android.content.Context
+import android.net.ConnectivityManager
+import android.net.NetworkCapabilities
+
+fun isConnectedToNetwork(context: Context): Boolean {
+    val connManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+    val caps = connManager.getNetworkCapabilities(connManager.activeNetwork) ?: return false
+    return caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED)
+}