Add confirmation on new player registration (#6849)

* Attempt to add registration confirmation

Using SRP auth mechanism, if server sent AUTH_MECHANISM_FIRST_SRP that means the player isn't exist.
Also tell player about the server and chosen username.
Local game has localhost as IP address of the server.
Add RenderingEngine::draw_menu_scene() to draw GUI and clouds background.
aborted -> connection_aborted

* Rewrite information message text

Client::promptConfirmRegister() -> Client::promptConfirmRegistration()

1 files changed, 61 insertions, 0 deletions

diff --git a/src/gui/guiConfirmRegistration.h b/src/gui/guiConfirmRegistration.h
new file mode 100644
index 000000000..e14066e0e
--- /dev/null
+++ b/src/gui/guiConfirmRegistration.h
@@ -0,0 +1,61 @@
+/*
+Minetest
+Copyright (C) 2018 srifqi, Muhammad Rifqi Priyo Susanto
+		<muhammadrifqipriyosusanto@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#pragma once
+
+#include "irrlichttypes_extrabloated.h"
+#include "modalMenu.h"
+#include <string>
+
+class Client;
+
+class GUIConfirmRegistration : public GUIModalMenu
+{
+public:
+	GUIConfirmRegistration(gui::IGUIEnvironment *env, gui::IGUIElement *parent,
+			s32 id, IMenuManager *menumgr, Client *client,
+			const std::string &playername, const std::string &password,
+			const std::string &address, bool *aborted);
+	~GUIConfirmRegistration();
+
+	void removeChildren();
+	/*
+		Remove and re-add (or reposition) stuff
+	*/
+	void regenerateGui(v2u32 screensize);
+
+	void drawMenu();
+
+	void closeMenu(bool goNext);
+
+	void acceptInput();
+
+	bool processInput();
+
+	bool OnEvent(const SEvent &event);
+
+private:
+	Client *m_client = nullptr;
+	const std::string &m_playername;
+	const std::string &m_password;
+	const std::string &m_address;
+	bool *m_aborted = nullptr;
+	std::wstring m_pass_confirm = L"";
+};