Reflect message IDs in channel MUCs

fix #3283

src/utils/uuid.cpp

@@ -0,0 +1,14 @@
+#include <utils/uuid.hpp>
+#include <uuid/uuid.h>
+
+namespace utils
+{
+std::string gen_uuid()
+{
+  char uuid_str[37];
+  uuid_t uuid;
+  uuid_generate(uuid);
+  uuid_unparse(uuid, uuid_str);
+  return uuid_str;
+}
+}