Only delete user defined rules with the clear button

app/src/main/java/com/frostnerd/smokescreen/activity/DnsRuleActivity.kt

@@ -117,7 +117,7 @@ class DnsRuleActivity : BaseActivity() {
                         getString(R.string.dialog_clearuserrules_title),
                         getString(R.string.dialog_clearuserrules_message),
                         getString(R.string.all_yes) to { dialog, _ ->
-                            getDatabase().dnsRuleRepository().deleteAllAsync()
+                            getDatabase().dnsRuleRepository().deleteAllUserRulesAsync()
                             dialog.dismiss()
                         }, getString(R.string.all_no) to { dialog, _ ->
                             dialog.dismiss()

app/src/main/java/com/frostnerd/smokescreen/database/dao/DnsRuleDao.kt

@@ -30,8 +30,8 @@ import org.minidns.record.Record
 @TypeConverters(DnsTypeConverter::class)
 interface DnsRuleDao {
 
-    @Query("DELETE FROM DnsRule")
-    fun deleteAll()
+    @Query("DELETE FROM DnsRule WHERE importedFrom IS NULL")
+    fun deleteAllUserRules()
 
     @Query("UPDATE DnsRule SET stagingType=1 WHERE importedFrom IS NOT NULL")
     fun markNonUserRulesForDeletion()

app/src/main/java/com/frostnerd/smokescreen/database/repository/DnsRuleRepository.kt

@@ -27,9 +27,9 @@ import kotlinx.coroutines.launch
  */
 class DnsRuleRepository(val dnsRuleDao: DnsRuleDao) {
 
-    fun deleteAllAsync(coroutineScope: CoroutineScope = GlobalScope) {
+    fun deleteAllUserRulesAsync(coroutineScope: CoroutineScope = GlobalScope) {
         coroutineScope.launch {
-            dnsRuleDao.deleteAll()
+            dnsRuleDao.deleteAllUserRules()
         }
     }