Send answers back to the server

lib/helpers/account_helper.dart

@@ -144,6 +144,20 @@ class AccountHelper {
               .getObject()["questions"])
           .cast<String>();
 
+  /// Validate given security answers
+  ///
+  /// Throws an [Exception] in case of failure
+  ///
+  /// Returns a password reset token in case of success
+  static Future<String> checkAnswers(
+          String email, List<String> answers) async =>
+      (await APIRequest.withoutLogin("account/check_security_answers")
+              .addString("email", email)
+              .addString("answers",
+                  answers.map((f) => Uri.encodeComponent(f)).join("&"))
+              .execWithThrow())
+          .getObject()["reset_token"];
+
   /// Get current user ID from the server
   Future<int> _downloadCurrentUserID() async {
     final response = await APIRequest(

lib/ui/routes/reset_password_route.dart

@@ -213,14 +213,26 @@ class _ResetPasswordBodyState extends SafeState<_ResetPasswordBody> {
                 _canSubmitAnswers ? (s) => _submitSecurityAnswers() : null,
             decoration: InputDecoration(
                 alignLabelWithHint: false,
-                labelText: tr("Answer %num%", args: {"num": id.toString()})),
+                labelText:
+                    tr("Answer %num%", args: {"num": (id + 1).toString()})),
           ),
           _Spacer()
         ],
       );
 
   /// Submit security answers
-  Future<void> _submitSecurityAnswers() async {}
+  Future<void> _submitSecurityAnswers() async {
+    _setLoading(true);
+    try {
+      final token = await AccountHelper.checkAnswers(_emailAddress, _answers);
+      print(token);
+    } catch (e, s) {
+      print("Could not submit security answers! $e\n$s");
+      showSimpleSnack(
+          context, tr("Could not validate these security answers!"));
+    }
+    _setLoading(false);
+  }
 }
 
 class _Spacer extends StatelessWidget {