Minor fixes

Author: rfc2822

app/src/main/kotlin/at/bitfire/davdroid/ui/setup/NextcloudLoginModel.kt

@@ -16,6 +16,7 @@ import dagger.assisted.AssistedFactory
 import dagger.assisted.AssistedInject
 import dagger.hilt.android.lifecycle.HiltViewModel
 import dagger.hilt.android.qualifiers.ApplicationContext
+import io.ktor.http.URLParserException
 import io.ktor.http.Url
 import kotlinx.coroutines.launch
 import java.util.logging.Level
@@ -55,9 +56,13 @@ class NextcloudLoginModel @AssistedInject constructor(
                 baseUrl
             else
                 "https://$baseUrl"
-        val baseKtorUrl = Url(baseUrlWithPrefix)
+        val baseKtorUrl = try {
+            Url(baseUrlWithPrefix)
+        } catch (_: URLParserException) {
+            null
+        }
 
-        val canContinue = !inProgress
+        val canContinue = !inProgress && baseKtorUrl != null
     }
 
     var uiState by mutableStateOf(UiState())
@@ -102,7 +107,7 @@ class NextcloudLoginModel @AssistedInject constructor(
      */
     fun startLoginFlow() {
         val baseUrl = uiState.baseKtorUrl
-        if (uiState.inProgress)
+        if (uiState.inProgress || baseUrl == null)
             return
 
         uiState = uiState.copy(

app/src/test/kotlin/at/bitfire/davdroid/network/NextcloudLoginFlowTest.kt

@@ -17,7 +17,7 @@ class NextcloudLoginFlowTest {
     fun `loginFlowUrl accepts v2 URL`() {
         assertEquals(
             Url("http://example.com/index.php/login/v2"),
-            flow.loginFlowUrl(Url("http://example.com/index.php/login/flow"))
+            flow.loginFlowUrl(Url("http://example.com/index.php/login/v2"))
         )
     }