From bd4ff81e324f418ea191e57b48fd7dd7669947b1 Mon Sep 17 00:00:00 2001
From: rjawor <rjawor@amu.edu.pl>
Date: Sun, 15 Oct 2017 18:54:15 +0200
Subject: [PATCH] ensuring UTF-8 strings

---
 concordia/common/text_utils.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/concordia/common/text_utils.cpp b/concordia/common/text_utils.cpp
index c7704bd..91049de 100644
--- a/concordia/common/text_utils.cpp
+++ b/concordia/common/text_utils.cpp
@@ -2,6 +2,8 @@
 #include <boost/algorithm/string.hpp>
 #include <boost/algorithm/string/case_conv.hpp>
 #include <boost/locale.hpp>
+#include "utf8/utf8.h"
+
 
 TextUtils::TextUtils() {
     _lowerConverter =
@@ -11,6 +13,9 @@ TextUtils::TextUtils() {
 }
 
 std::string TextUtils::toLowerCase(const std::string & text) {
+    if (!utf8::is_valid(text.begin(), text.end())) {
+        throw ConcordiaException("Bad input encoding, use UTF-8");
+    }
     return simpleConvert(*_lowerConverter, text);
 }