cleanup argument parsing + add socket creation factory

ixwebsocket/IXSocketFactory.cpp

@@ -0,0 +1,42 @@
+/*
+ *  IXSocketFactory.cpp
+ *  Author: Benjamin Sergeant
+ *  Copyright (c) 2019 Machine Zone, Inc. All rights reserved.
+ */
+
+#include "IXSocketFactory.h"
+
+#if defined(__APPLE__) or defined(__linux__)
+# ifdef __APPLE__
+#  include <ixwebsocket/IXSocketAppleSSL.h>
+# else
+#  include <ixwebsocket/IXSocketOpenSSL.h>
+# endif
+#endif
+
+namespace ix
+{
+    std::shared_ptr<Socket> createSocket(bool tls,
+                                         std::string& errorMsg)
+    {
+        errorMsg.clear();
+
+        if (!tls)
+        {
+            return std::make_shared<Socket>();
+        }
+        else
+        {
+#ifdef IXWEBSOCKET_USE_TLS
+# ifdef __APPLE__
+            return std::make_shared<SocketAppleSSL>();
+# else
+            return std::make_shared<SocketOpenSSL>();
+# endif
+#else
+            errorMsg = "TLS support is not enabled on this platform.";
+            return nullptr;
+#endif
+        }
+    }
+}