Feature/thesis work merge (#566)

Web GUI from Klas Eskilson (three new modules: webgui, webbrowser and cefwebgui)
Parallel connection refactorization
Wormhole server added to the main repository
Transfer function editor work from Cristoffer Särevall
Update ghoul

modules/server/servermodule.h

@@ -0,0 +1,80 @@
+/*****************************************************************************************
+ *                                                                                       *
+ * OpenSpace                                                                             *
+ *                                                                                       *
+ * Copyright (c) 2014-2017                                                               *
+ *                                                                                       *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
+ * software and associated documentation files (the "Software"), to deal in the Software *
+ * without restriction, including without limitation the rights to use, copy, modify,    *
+ * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to    *
+ * permit persons to whom the Software is furnished to do so, subject to the following   *
+ * conditions:                                                                           *
+ *                                                                                       *
+ * The above copyright notice and this permission notice shall be included in all copies *
+ * or substantial portions of the Software.                                              *
+ *                                                                                       *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,   *
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
+ * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT    *
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF  *
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE  *
+ * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                                         *
+ ****************************************************************************************/
+
+#ifndef __OPENSPACE_MODULE_SERVER___SERVERMODULE___H__
+#define __OPENSPACE_MODULE_SERVER___SERVERMODULE___H__
+
+#include <openspace/util/openspacemodule.h>
+
+#include <ghoul/io/socket/tcpsocketserver.h>
+#include <ghoul/misc/templatefactory.h>
+
+#include <deque>
+#include <memory>
+#include <thread>
+#include <mutex>
+#include <cstdint>
+#include <map>
+#include <ext/json/json.hpp>
+#include <fmt/format.h>
+
+#include "include/connection.h"
+#include "include/topic.h"
+
+namespace openspace {
+
+struct Message {
+    std::weak_ptr<Connection> connection;
+    std::string messageString;
+};
+
+class ServerModule : public OpenSpaceModule {
+public:
+    static constexpr const char* Name = "Server";
+    ServerModule();
+    virtual ~ServerModule();
+protected:
+    void internalInitialize(const ghoul::Dictionary& configuration) override;
+private:
+    struct ConnectionData {
+        std::shared_ptr<Connection> connection;
+        bool markedForRemoval = false;
+    };
+
+    void handleConnection(std::shared_ptr<Connection> connection);
+    void cleanUpFinishedThreads();
+    void consumeMessages();
+    void disconnectAll();
+    void preSync();
+
+    std::mutex _messageQueueMutex;
+    std::deque<Message> _messageQueue;
+
+    std::vector<ConnectionData> _connections;
+    std::vector<std::unique_ptr<ghoul::io::SocketServer>> _servers;
+};
+
+} // namespace openspace
+
+#endif // __OPENSPACE_MODULE_SERVER___SERVERMODULE___H__