add swipe gesture

src/json/jsonobject.cpp

@@ -46,6 +46,7 @@ char* JsonObject::getJsonString(const char* catergory, const char* stringName)
 	if (!first) return nullptr;
 
 	cJSON* second = cJSON_GetObjectItem(first, stringName);
+	if (!second) return nullptr;
 	return second->valuestring;
 
 }
@@ -61,8 +62,10 @@ char* JsonObject::getArrayNode(const char* catergory, const char* stringName, in
 	if (!second) return nullptr;
 
 	cJSON* third = cJSON_GetArrayItem(second, index);
-
+	if (!third) return nullptr;
 	cJSON* fourth = cJSON_GetObjectItem(third, id);
+
+	if (!fourth) return nullptr;
 	return fourth->valuestring;
 }
 
@@ -78,7 +81,7 @@ void JsonObject::setArrayNode(const char* catergory, const char* stringName, int
 	if (!second) return;
 
 	cJSON* third = cJSON_GetArrayItem(second, index);
-
+	if (!third) return;
 	cJSON* Item = cJSON_CreateString(stringValue);
 	cJSON_ReplaceItemInObject(third, id, Item);
 }
@@ -93,7 +96,7 @@ int JsonObject::getArraySize(const char* catergory, const char* stringName)
 	if (!first) return 0;
 
 	cJSON* second = cJSON_GetObjectItem(first, stringName);
-
+	if (!second) return 0;
 	return cJSON_GetArraySize(second);
 }
 
@@ -153,6 +156,8 @@ QStringList JsonObject::worklistFilters()
 	if (!first) return QStringList();
 
 	cJSON* second = cJSON_GetObjectItem(first, "lists");
+
+
 	std::string lans = second->valuestring;
 	QString str = QString::fromLocal8Bit(QByteArray::fromRawData(lans.c_str(), lans.size()));
 	return str.split(";");
@@ -170,6 +175,8 @@ QStringList JsonObject::language()
 	if (!first) return QStringList();
 
 	cJSON* second = cJSON_GetObjectItem(first, "language");
+	if (!second) return QStringList();
+
 	std::string lans = second->valuestring;
 	QString str = QString::fromLocal8Bit(QByteArray::fromRawData(lans.c_str(), lans.size()));
 	return str.split(";");