code:
/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@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.
*/

#include "chat.h"
#include "debug.h"
#include "config.h"
#include "util/strfnd.h"
#include <cctype>
#include <sstream>
#include "util/string.h"
#include "util/numeric.h"

ChatBuffer::ChatBuffer(u32 scrollback):
	m_scrollback(scrollback),
	m_unformatted(),
	m_cols(0),
	m_rows(0),
	m_scroll(0),
	m_formatted(),
	m_empty_formatted_line()
{
	if (m_scrollback == 0)
		m_scrollback = 1;
	m_empty_formatted_line.first = true;
}

ChatBuffer::~ChatBuffer()
{
}

void ChatBuffer::addLine(std::wstring name, std::wstring text)
{
	ChatLine line(name, text);
	m_unformatted.push_back(line);

	if (m_rows > 0)
	{
		// m_formatted is valid and must be kept valid
		bool scrolled_at_bottom = (m_scroll == getBottomScrollPos());
		u32 num_added = formatChatLine(line, m_cols, m_formatted);
		if (scrolled_at_bottom)
			m_scroll += num_added;
	}

	// Limit number of lines by m_scrollback
	if (m_unformatted.size() > m_scrollback)
	{
		deleteOldest(m_unformatted.size() - m_scrollback);
	}
}

void ChatBuffer::clear()
{
	m_unformatted.clear();
	m_formatted.clear();
	m_scroll = 0;
}

u32 ChatBuffer::getLineCount() const
{
	return m_unformatted.size();
}

const ChatLine& ChatBuffer::getLine(u32 index) const
{
	assert(index < getLineCount());	// pre-condition
	return m_unformatted[index];
}

void ChatBuffer::step(f32 dtime)
{
	for (u32 i = 0; i < m_unformatted.size(); ++i)
	{
		m_unformatted[i].age += dtime;
	}
}

void ChatBuffer::deleteOldest(u32 count)
{
	bool at_bottom = (m_scroll == getBottomScrollPos());

	u32 del_unformatted = 0;
	u32 del_formatted = 0;

	while (count > 0 && del_unformatted < m_unformatted.size())
	{
		++del_unformatted;

		// keep m_formatted in sync
		if (del_formatted < m_formatted.size())
		{

			sanity_check(m_formatted[del_formatted].first);
			++del_formatted;
			while (del_formatted < m_formatted.size() &&
					!m_formatted[del_formatted].first)
				++del_formatted;
		}

		--count;
	}

	m_unformatted.erase(m_unformatted.begin(), m_unformatted.begin() + del_unformatted);
	m_formatted.erase(m_formatted.begin(), m_formatted.begin() + del_formatted);

	if (at_bottom)
		m_scroll = getBottomScrollPos();
	else
		scrollAbsolute(m_scroll - del_formatted);
}

void ChatBuffer::deleteByAge(f32 maxAge)
{
	u32 count = 0;
	while (count < m_unformatted.size() && m_unformatted[count].age > maxAge)
		++count;
	deleteOldest(count);
}

u32 ChatBuffer::getColumns() const
{
	return m_cols;
}

u32 ChatBuffer::getRows() const
{
	return m_rows;
}

void ChatBuffer::reformat(u32 cols, u32 rows)
{
	if (cols == 0 || rows == 0)
	{
		// Clear formatted buffer
		m_cols = 0;
		m_rows = 0;
		m_scroll = 0;
		m_formatted.clear();
	}
	else if (cols != m_cols || rows != m_rows)
	{
		// TODO: Avoid reformatting ALL lines (even invisible ones)
		// each time the console size changes.

		// Find out the scroll position in *unformatted* lines
		u32 restore_scroll_unformatted = 0;
		u32 restore_scroll_formatted = 0;
		bool at_bottom = (m_scroll == getBottomScrollPos());
		if (!at_bottom)
		{
			for (s32 i = 0; i < m_scroll; ++i)
			{
				if (m_formatted[i].first)
					++restore_scroll_unformatted;
			}
		}

		// If number of columns change, reformat everything
		if (cols != m_cols)
		{
			m_formatted.clear();
			for (u32 i = 0; i < m_unformatted.size(); ++i)
			{
				if (i == restore_scroll_unformatted)
					restore_scroll_formatted = m_formatted.size();
				formatChatLine(m_unformatted[i], cols, m_formatted);
			}
		}

		// Update the console size
		m_cols = cols;
		m_rows = rows;

		// Restore the scroll position
		if (at_bottom)
		{
			scrollBottom();
		}
		else
		{
			scrollAbsolute(restore_scroll_formatted);
		}
	}
}

const ChatFormattedLine& ChatBuffer::getFormattedLine(u32 row) const
{
	s32 index = m_scroll + (s32) row;
	if (index >= 0 && index < (s32) m_formatted.size())
		return m_formatted[index];
	else
		return m_empty_formatted_line;
}

void ChatBuffer::scroll(s32 rows)
{
	scrollAbsolute(m_scroll + rows);
}

void ChatBuffer::scrollAbsolute(s32 scroll)
{
	s32 top = getTopScrollPos();
	s32 bottom = getBottomScrollPos();

	m_scroll = scroll;
	if (m_scroll < top)
		m_scroll = top;
	if (m_scroll > bottom)
		m_scroll = bottom;
}

void ChatBuffer::scrollBottom()
{
	m_scroll = getBottomScrollPos();
}

void ChatBuffer::scrollTop()
{
	m_scroll = getTopScrollPos();
}

u32 ChatBuffer::formatChatLine(const ChatLine& line, u32 cols,
		std::vector<ChatFormattedLine>& destination) const
{
	u32 num_added = 0;
	std::vector<ChatFormattedFragment> next_frags;
	ChatFormattedLine next_line;
	ChatFormattedFragment temp_frag;
	u32 out_column = 0;
	u32 in_pos = 0;
	u32 hanging_indentation = 0;

	// Format the sender name and produce fragments
	if (!line.name.empty()) {
		temp_frag.text = L"<";
		temp_frag.column = 0;
		//temp_frag.bold = 0;
		next_frags.push_back(temp_frag);
		temp_frag.text = line.name;
		temp_frag.column = 0;
		//temp_frag.bold = 1;
		next_frags.push_back(temp_frag);
		temp_frag.text = L"> ";
		temp_frag.column = 0;
		//temp_frag.bold = 0;
		next_frags.push_back(temp_frag);
	}

	std::wstring name_sanitized = line.name.c_str();

	// Choose an indentation level
	if (line.name.empty()) {
		// Server messages
		hanging_indentation = 0;
	} else if (name_sanitized.size() + 3 <= cols/2) {
		// Names shorter than about half the console width
		hanging_indentation = line.name.size() + 3;
	} else {
		// Very long names
		hanging_indentation = 2;
	}
	//EnrichedString line_text(line.text);

	next_line.first = true;
	bool text_processing = false;

	// Produce fragments and layout them into lines
	while (!next_frags.empty() || in_pos < line.text.size())
	{
		// Layout fragments into lines
		while (!next_frags.empty())
		{
			ChatFormattedFragment& frag = next_frags[0];
			if (frag.text.size() <= cols - out_column)
			{
				// Fragment fits into current line
				frag.column = out_column;
				next_line.fragments.push_back(frag);
				out_column += frag.text.size();
				next_frags.erase(next_frags.begin());
			}
			else
			{
				// Fragment does not fit into current line
				// So split it up
				temp_frag.text = frag.text.substr(0, cols - out_column);
				temp_frag.column = out_column;
				//temp_frag.bold = frag.bold;
				next_line.fragments.push_back(temp_frag);
				frag.text = frag.text.substr(cols - out_column);
				out_column = cols;
			}
			if (out_column == cols || text_processing)
			{
				// End the current line
				destination.push_back(next_line);
				num_added++;
				next_line.fragments.clear();
				next_line.first = false;

				out_column = text_processing ? hanging_indentation : 0;
			}
		}

		// Produce fragment
		if (in_pos < line.text.size())
		{
			u32 remaining_in_input = line.text.size() - in_pos;
			u32 remaining_in_output = cols - out_column;

			// Determine a fragment length <= the minimum of
			// remaining_in_{in,out}put. Try to end the fragment
			// on a word boundary.
			u32 frag_length = 1, space_pos = 0;
			while (frag_length < remaining_in_input &&
					frag_length < remaining_in_output)
			{
				if (iswspace(line.text.getString()[in_pos + frag_length]))
					space_pos = frag_length;
				++frag_length;
			}
			if (space_pos != 0 && frag_length < remaining_in_input)
				frag_length = space_pos + 1;

			temp_frag.text = line.text.substr(in_pos, frag_length);
			temp_frag.column = 0;
			//temp_frag.bold = 0;
			next_frags.push_back(temp_frag);
			in_pos += frag_length;
			text_processing = true;
		}
	}

	// End the last line
	if (num_added == 0 || !next_line.fragments.empty())
	{
		destination.push_back(next_line);
		num_added++;
	}

	return num_added;
}

s32 ChatBuffer::getTopScrollPos() const
{
	s32 formatted_count = (s32) m_formatted.size();
	s32 rows = (s32) m_rows;
	if (rows == 0)
		return 0;
	else if (formatted_count <= rows)
		return formatted_count - rows;
	else
		return 0;
}

s32 ChatBuffer::getBottomScrollPos() const
{
	s32 formatted_count = (s32) m_formatted.size();
	s32 rows = (s32) m_rows;
	if (rows == 0)
		return 0;
	else
		return formatted_count - rows;
}

ChatPrompt::ChatPrompt(const std::wstring &prompt, u32 history_limit):
	m_prompt(prompt),
	m_line(L""),
	m_history(),
	m_history_index(0),
	m_history_limit(history_limit),
	m_cols(0),
	m_view(0),
	m_cursor(0),
	m_cursor_len(0),
	m_nick_completion_start(0),
	m_nick_completion_end(0)
{
}

ChatPrompt::~ChatPrompt()
{
}

void ChatPrompt::input(wchar_t ch)
{
	m_line.insert(m_cursor, 1, ch);
	m_cursor++;
	clampView();
	m_nick_completion_start = 0;
	m_nick_completion_end = 0;
}

void ChatPrompt::input(const std::wstring &str)
{
	m_line.insert(m_cursor, str);
	m_cursor += str.size();
	clampView();
	m_nick_completion_start = 0;
	m_nick_completion_end = 0;
}

void ChatPrompt::addToHistory(std::wstring line)
{
	if (!line.empty())
		m_history.push_back(line);
	if (m_history.size() > m_history_limit)
		m_history.erase(m_history.begin());
	m_history_index = m_history.size();
}

void ChatPrompt::clear()
{
	m_line.clear();
	m_view = 0;
	m_cursor = 0;
	m_nick_completion_start = 0;
	m_nick_completion_end = 0;
}

std::wstring ChatPrompt::replace(std::wstring line)
{
	std::wstring old_line = m_line;
	m_line =  line;
	m_view = m_cursor = line.size();
	clampView();
	m_nick_completion_start = 0;
	m_nick_completion_end = 0;
	return old_line;
}

void ChatPrompt::historyPrev()
{
	if (m_history_index != 0)
	{
		--m_history_index;
		replace(m_history[m_history_index]);
	}
}

void ChatPrompt::historyNext()
{
	if (m_history_index + 1 >= m_history.size())
	{
		m_history_index = m_history.size();
		replace(L"");
	}
	else
	{
		++m_history_index;
		replace(m_history[m_history_index]);
	}
}

void ChatPrompt::nickCompletion(const std::list<std::string>& names, bool backwards)
{
	// Two cases:
	// (a) m_nick_completion_start == m_nick_completion_end == 0
	//     Then no previous nick completion is active.
	//     Get the word around the cursor and replace with any nick
	//     that has that word as a prefix.
	// (b) else, continue a previous nick completion.
	//     m_nick_completion_start..m_nick_completion_end are the
	//     interval where the originally used prefix was. Cycle
	//     through the list of completions of that prefix.
	u32 prefix_start = m_nick_completion_start;
	u32 prefix_end = m_nick_completion_end;
	bool initial = (prefix_end == 0);
	if (initial)
	{
		// no previous nick completion is active
		prefix_start = prefix_end = m_cursor;
		while (prefix_start > 0 && !iswspace(m_line[prefix_start-1]))
			--prefix_start;
		while (prefix_end < m_line.size() && !iswspace(m_line[prefix_end]))
			++prefix_end;
		if (prefix_start == prefix_end)
			return;
	}
	std::wstring prefix = m_line.substr(prefix_start, prefix_end - prefix_start);

	// find all names that start with the selected prefix
	std::vector<std::wstring> completions;
	for (std::list<std::string>::const_iterator
			i = names.begin();
			i != names.end(); ++i)
	{
		if (str_starts_with(narrow_to_wide(*i), prefix, true))
		{
			std::wstring completion = narrow_to_wide(*i);
			if (prefix_start == 0)
				completion += L": ";
			completions.push_back(completion);
		}
	}
	if (completions.empty())
		return;

	// find a replacement string and the word that will be replaced
	u32 word_end = prefix_end;
	u32 replacement_index = 0;
	if (!initial)
	{
		while (word_end < m_line.size() && !iswspace(m_line[word_end]))
			++word_end;
		std::wstring word = m_line.substr(prefix_start, word_end - prefix_start);

		// cycle through completions
		for (u32 i = 0; i < completions.size(); ++i)
		{
			if (str_equal(word, completions[i], true))
			{
				if (backwards)
					replacement_index = i + completions.size() - 1;
				else
					replacement_index = i + 1;
				replacement_index %= completions.size();
				break;
			}
		}
	}
	std::wstring replacement = completions[replacement_index];
	if (word_end < m_line.size() && iswspace(m_line[word_end]))
		++word_end;

	// replace existing word with replacement word,
	// place the cursor at the end and record the completion prefix
	m_line.replace(prefix_start, word_end - prefix_start, replacement);
	m_cursor = prefix_start + replacement.size();
	clampView();
	m_nick_completion_start = prefix_start;
	m_nick_completion_end = prefix_end;
}

void ChatPrompt::reformat(u32 cols)
{
	if (cols <= m_prompt.size())
	{
		m_cols = 0;
		m_view = m_cursor;
	}
	else
	{
		s32 length = m_line.size();
		bool was_at_end = (m_view + m_cols >= length + 1);
		m_cols = cols - m_prompt.size();
		if (was_at_end)
			m_view = length;
		clampView();
	}
}

std::wstring ChatPrompt::getVisiblePortion() const
{
	return m_prompt + m_line.substr(m_view, m_cols);
}

s32 ChatPrompt::getVisibleCursorPosition() const
{
	return m_cursor - m_view + m_prompt.size();
}

void ChatPrompt::cursorOperation(CursorOp op, CursorOpDir dir, CursorOpScope scope)
{
	s32 old_cursor = m_cursor;
	s32 new_cursor = m_cursor;

	s32 length = m_line.size();
	s32 increment = (dir == CURSOROP_DIR_RIGHT) ? 1 : -1;

	switch (scope) {
	case CURSOROP_SCOPE_CHARACTER:
		new_cursor += increment;
		break;
	case CURSOROP_SCOPE_WORD:
		if (dir == CURSOROP_DIR_RIGHT) {
			// skip one word to the right
			while (new_cursor < length && iswspace(m_line[new_cursor]))
				new_cursor++;
			while (new_cursor < length && !iswspace(m_line[new_cursor]))
				new_cursor++;
			while (new_cursor < length && iswspace(m_line[new_cursor]))
				new_cursor++;
		} else {
			// skip one word to the left
			while (new_cursor >= 1 && iswspace(m_line[new_cursor - 1]))
				new_cursor--;
			while (new_cursor >= 1 && !iswspace(m_line[new_cursor - 1]))
				new_cursor--;
		}
		break;
	case CURSOROP_SCOPE_LINE:
		new_cursor += increment * length;
		break;
	case CURSOROP_SCOPE_SELECTION:
		break;
	}

	new_cursor = MYMAX(MYMIN(new_cursor, length), 0);

	switch (op) {
	case CURSOROP_MOVE:
		m_cursor = new_cursor;
		m_cursor_len = 0;
		break;
	case CURSOROP_DELETE:
		if (m_cursor_len > 0) { // Delete selected text first
			m_line.erase(m_cursor, m_cursor_len);
		} else {
			m_cursor = MYMIN(new_cursor, old_cursor);
			m_line.erase(m_cursor, abs(new_cursor - old_cursor));
		}
		m_cursor_len = 0;
		break;
	case CURSOROP_SELECT:
		if (scope == CURSOROP_SCOPE_LINE) {
			m_cursor = 0;
			m_cursor_len = length;
		} else {
			m_cursor = MYMIN(new_cursor, old_cursor);
			m_cursor_len += abs(new_cursor - old_cursor);
			m_cursor_len = MYMIN(m_cursor_len, length - m_cursor);
		}
		break;
	}

	clampView();

	m_nick_completion_start = 0;
	m_nick_completion_end = 0;
}

void ChatPrompt::clampView()
{
	s32 length = m_line.size();
	if (length + 1 <= m_cols)
	{
		m_view = 0;
	}
	else
	{
		m_view = MYMIN(m_view, length + 1 - m_cols);
		m_view = MYMIN(m_view, m_cursor);
		m_view = MYMAX(m_view, m_cursor - m_cols + 1);
		m_view = MYMAX(m_view, 0);
	}
}

ChatBackend::ChatBackend():
	m_console_buffer(500),
	m_recent_buffer(6),
	m_prompt(L"]", 500)
{
}

ChatBackend::~ChatBackend()
{
}

void ChatBackend::addMessage(std::wstring name, std::wstring text)
{
	// Note: A message may consist of multiple lines, for example the MOTD.
	WStrfnd fnd(text);
	while (!fnd.at_end())
	{
		std::wstring line = fnd.next(L"\n");
		m_console_buffer.addLine(name, line);
		m_recent_buffer.addLine(name, line);
	}
}

void ChatBackend::addUnparsedMessage(std::wstring message)
{
	// TODO: Remove the need to parse chat messages client-side, by sending
	// separate name and text fields in TOCLIENT_CHAT_MESSAGE.

	if (message.size() >= 2 && message[0] == L'<')
	{
		std::size_t closing = message.find_first_of(L'>', 1);
		if (closing != std::wstring::npos &&
				closing + 2 <= message.size() &&
				message[closing+1] == L' ')
		{
			std::wstring name = message.substr(1, closing - 1);
			std::wstring text = message.substr(closing + 2);
			addMessage(name, text);
			return;
		}
	}

	// Unable to parse, probably a server message.
	addMessage(L"", message);
}

ChatBuffer& ChatBackend::getConsoleBuffer()
{
	return m_console_buffer;
}

ChatBuffer& ChatBackend::getRecentBuffer()
{
	return m_recent_buffer;
}

EnrichedString ChatBackend::getRecentChat()
{
	EnrichedString result;
	for (u32 i = 0; i < m_recent_buffer.getLineCount(); ++i)
	{
		const ChatLine& line = m_recent_buffer.getLine(i);
		if (i != 0)
			result += L"\n";
		if (!line.name.empty()) {
			result += L"<";
			result += line.name;
			result += L"> ";
		}
		result += line.text;
	}
	return result;
}

ChatPrompt& ChatBackend::getPrompt()
{
	return m_prompt;
}

void ChatBackend::reformat(u32 cols, u32 rows)
{
	m_console_buffer.reformat(cols, rows);

	// no need to reformat m_recent_buffer, its formatted lines
	// are not used

	m_prompt.reformat(cols);
}

void ChatBackend::clearRecentChat()
{
	m_recent_buffer.clear();
}

void ChatBackend::step(float dtime)
{
	m_recent_buffer.step(dtime);
	m_recent_buffer.deleteByAge(60.0);

	// no need to age messages in anything but m_recent_buffer
}

void ChatBackend::scroll(s32 rows)
{
	m_console_buffer.scroll(rows);
}

void ChatBackend::scrollPageDown()
{
	m_console_buffer.scroll(m_console_buffer.getRows());
}

void ChatBackend::scrollPageUp()
{
	m_console_buffer.scroll(-(s32)m_console_buffer.getRows());
}


code:
/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@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.
*/

#ifndef CHAT_HEADER
#define CHAT_HEADER

#include <string>
#include <vector>
#include <list>

#include "irrlichttypes.h"
#include "util/enriched_string.h"

// Chat console related classes

struct ChatLine
{
	// age in seconds
	f32 age;
	// name of sending player, or empty if sent by server
	EnrichedString name;
	// message text
	EnrichedString text;

	ChatLine(const std::wstring &a_name, const std::wstring &a_text):
		age(0.0),
		name(a_name),
		text(a_text)
	{
	}

	ChatLine(const EnrichedString &a_name, const EnrichedString &a_text):
		age(0.0),
		name(a_name),
		text(a_text)
	{
	}
};

struct ChatFormattedFragment
{
	// text string
	EnrichedString text;
	// starting column
	u32 column;
	// formatting
	//u8 bold:1;
};

struct ChatFormattedLine
{
	// Array of text fragments
	std::vector<ChatFormattedFragment> fragments;
	// true if first line of one formatted ChatLine
	bool first;
};

class ChatBuffer
{
public:
	ChatBuffer(u32 scrollback);
	~ChatBuffer();

	// Append chat line
	// Removes oldest chat line if scrollback size is reached
	void addLine(std::wstring name, std::wstring text);

	// Remove all chat lines
	void clear();

	// Get number of lines currently in buffer.
	u32 getLineCount() const;
	// Get reference to i-th chat line.
	const ChatLine& getLine(u32 index) const;

	// Increase each chat line's age by dtime.
	void step(f32 dtime);
	// Delete oldest N chat lines.
	void deleteOldest(u32 count);
	// Delete lines older than maxAge.
	void deleteByAge(f32 maxAge);

	// Get number of columns, 0 if reformat has not been called yet.
	u32 getColumns() const;
	// Get number of rows, 0 if reformat has not been called yet.
	u32 getRows() const;
	// Update console size and reformat all formatted lines.
	void reformat(u32 cols, u32 rows);
	// Get formatted line for a given row (0 is top of screen).
	// Only valid after reformat has been called at least once
	const ChatFormattedLine& getFormattedLine(u32 row) const;
	// Scrolling in formatted buffer (relative)
	// positive rows == scroll up, negative rows == scroll down
	void scroll(s32 rows);
	// Scrolling in formatted buffer (absolute)
	void scrollAbsolute(s32 scroll);
	// Scroll to bottom of buffer (newest)
	void scrollBottom();
	// Scroll to top of buffer (oldest)
	void scrollTop();

	// Format a chat line for the given number of columns.
	// Appends the formatted lines to the destination array and
	// returns the number of formatted lines.
	u32 formatChatLine(const ChatLine& line, u32 cols,
			std::vector<ChatFormattedLine>& destination) const;

protected:
	s32 getTopScrollPos() const;
	s32 getBottomScrollPos() const;

private:
	// Scrollback size
	u32 m_scrollback;
	// Array of unformatted chat lines
	std::vector<ChatLine> m_unformatted;

	// Number of character columns in console
	u32 m_cols;
	// Number of character rows in console
	u32 m_rows;
	// Scroll position (console's top line index into m_formatted)
	s32 m_scroll;
	// Array of formatted lines
	std::vector<ChatFormattedLine> m_formatted;
	// Empty formatted line, for error returns
	ChatFormattedLine m_empty_formatted_line;
};

class ChatPrompt
{
public:
	ChatPrompt(const std::wstring &prompt, u32 history_limit);
	~ChatPrompt();

	// Input character or string
	void input(wchar_t ch);
	void input(const std::wstring &str);

	// Add a string to the history
	void addToHistory(std::wstring line);

	// Get current line
	std::wstring getLine() const { return m_line; }

	// Get section of line that is currently selected
	std::wstring getSelection() const { return m_line.substr(m_cursor, m_cursor_len); }

	// Clear the current line
	void clear();

	// Replace the current line with the given text
	std::wstring replace(std::wstring line);

	// Select previous command from history
	void historyPrev();
	// Select next command from history
	void historyNext();

	// Nick completion
	void nickCompletion(const std::list<std::string>& names, bool backwards);

	// Update console size and reformat the visible portion of the prompt
	void reformat(u32 cols);
	// Get visible portion of the prompt.
	std::wstring getVisiblePortion() const;
	// Get cursor position (relative to visible portion). -1 if invalid
	s32 getVisibleCursorPosition() const;
	// Get length of cursor selection
	s32 getCursorLength() const { return m_cursor_len; }

	// Cursor operations
	enum CursorOp {
		CURSOROP_MOVE,
		CURSOROP_SELECT,
		CURSOROP_DELETE
	};

	// Cursor operation direction
	enum CursorOpDir {
		CURSOROP_DIR_LEFT,
		CURSOROP_DIR_RIGHT
	};

	// Cursor operation scope
	enum CursorOpScope {
		CURSOROP_SCOPE_CHARACTER,
		CURSOROP_SCOPE_WORD,
		CURSOROP_SCOPE_LINE,
		CURSOROP_SCOPE_SELECTION
	};

	// Cursor operation
	// op specifies whether it's a move or delete operation
	// dir specifies whether the operation goes left or right
	// scope specifies how far the operation will reach (char/word/line)
	// Examples:
	//   cursorOperation(CURSOROP_MOVE, CURSOROP_DIR_RIGHT, CURSOROP_SCOPE_LINE)
	//     moves the cursor to the end of the line.
	//   cursorOperation(CURSOROP_DELETE, CURSOROP_DIR_LEFT, CURSOROP_SCOPE_WORD)
	//     deletes the word to the left of the cursor.
	void cursorOperation(CursorOp op, CursorOpDir dir, CursorOpScope scope);

protected:
	// set m_view to ensure that 0 <= m_view <= m_cursor < m_view + m_cols
	// if line can be fully shown, set m_view to zero
	// else, also ensure m_view <= m_line.size() + 1 - m_cols
	void clampView();

private:
	// Prompt prefix
	std::wstring m_prompt;
	// Currently edited line
	std::wstring m_line;
	// History buffer
	std::vector<std::wstring> m_history;
	// History index (0 <= m_history_index <= m_history.size())
	u32 m_history_index;
	// Maximum number of history entries
	u32 m_history_limit;

	// Number of columns excluding columns reserved for the prompt
	s32 m_cols;
	// Start of visible portion (index into m_line)
	s32 m_view;
	// Cursor (index into m_line)
	s32 m_cursor;
	// Cursor length (length of selected portion of line)
	s32 m_cursor_len;

	// Last nick completion start (index into m_line)
	s32 m_nick_completion_start;
	// Last nick completion start (index into m_line)
	s32 m_nick_completion_end;
};

class ChatBackend
{
public:
	ChatBackend();
	~ChatBackend();

	// Add chat message
	void addMessage(std::wstring name, std::wstring text);
	// Parse and add unparsed chat message
	void addUnparsedMessage(std::wstring line);

	// Get the console buffer
	ChatBuffer& getConsoleBuffer();
	// Get the recent messages buffer
	ChatBuffer& getRecentBuffer();
	// Concatenate all recent messages
	EnrichedString getRecentChat();
	// Get the console prompt
	ChatPrompt& getPrompt();

	// Reformat all buffers
	void reformat(u32 cols, u32 rows);

	// Clear all recent messages
	void clearRecentChat();

	// Age recent messages
	void step(float dtime);

	// Scrolling
	void scroll(s32 rows);
	void scrollPageDown();
	void scrollPageUp();

private:
	ChatBuffer m_console_buffer;
	ChatBuffer m_recent_buffer;
	ChatPrompt m_prompt;
};

#endif

repo_name: pgimeno/minetest

license: unknown


code:
/*
Minetest
Copyright (C) 2015 est31 <MTest31@outlook.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.
*/

#ifndef CHAT_INTERFACE_H
#define CHAT_INTERFACE_H

#include "util/container.h"
#include <string>
#include <queue>
#include "irrlichttypes.h"

enum ChatEventType {
	CET_CHAT,
	CET_NICK_ADD,
	CET_NICK_REMOVE,
	CET_TIME_INFO,
};

class ChatEvent {
protected:
	ChatEvent(ChatEventType a_type) { type = a_type; }
public:
	ChatEventType type;
};

struct ChatEventTimeInfo : public ChatEvent {
	ChatEventTimeInfo(
		u64 a_game_time,
		u32 a_time) :
	ChatEvent(CET_TIME_INFO),
	game_time(a_game_time),
	time(a_time)
	{}

	u64 game_time;
	u32 time;
};

struct ChatEventNick : public ChatEvent {
	ChatEventNick(ChatEventType a_type,
		const std::string &a_nick) :
	ChatEvent(a_type), // one of CET_NICK_ADD, CET_NICK_REMOVE
	nick(a_nick)
	{}

	std::string nick;
};

struct ChatEventChat : public ChatEvent {
	ChatEventChat(const std::string &a_nick,
		const std::wstring &an_evt_msg) :
	ChatEvent(CET_CHAT),
	nick(a_nick),
	evt_msg(an_evt_msg)
	{}

	std::string nick;
	std::wstring evt_msg;
};

struct ChatInterface {
	MutexedQueue<ChatEvent *> command_queue; // chat backend --> server
	MutexedQueue<ChatEvent *> outgoing_queue; // server --> chat backend
};

#endif


code:
/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@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.
*/

#include <iostream>
#include <algorithm>
#include <sstream>
#include <cmath>
#include <IFileSystem.h>
#include "threading/mutex_auto_lock.h"
#include "util/auth.h"
#include "util/directiontables.h"
#include "util/pointedthing.h"
#include "util/serialize.h"
#include "util/string.h"
#include "util/srp.h"
#include "client.h"
#include "network/clientopcodes.h"
#include "filesys.h"
#include "mapblock_mesh.h"
#include "mapblock.h"
#include "minimap.h"
#include "mods.h"
#include "profiler.h"
#include "gettext.h"
#include "clientmap.h"
#include "clientmedia.h"
#include "version.h"
#include "drawscene.h"
#include "database-sqlite3.h"
#include "serialization.h"
#include "guiscalingfilter.h"
#include "script/scripting_client.h"
#include "game.h"

extern gui::IGUIEnvironment* guienv;

/*
	Client
*/

Client::Client(
		IrrlichtDevice *device,
		const char *playername,
		const std::string &password,
		const std::string &address_name,
		MapDrawControl &control,
		IWritableTextureSource *tsrc,
		IWritableShaderSource *shsrc,
		IWritableItemDefManager *itemdef,
		IWritableNodeDefManager *nodedef,
		ISoundManager *sound,
		MtEventManager *event,
		bool ipv6,
		GameUIFlags *game_ui_flags
):
	m_packetcounter_timer(0.0),
	m_connection_reinit_timer(0.1),
	m_avg_rtt_timer(0.0),
	m_playerpos_send_timer(0.0),
	m_ignore_damage_timer(0.0),
	m_tsrc(tsrc),
	m_shsrc(shsrc),
	m_itemdef(itemdef),
	m_nodedef(nodedef),
	m_sound(sound),
	m_event(event),
	m_mesh_update_thread(this),
	m_env(
		new ClientMap(this, control,
			device->getSceneManager()->getRootSceneNode(),
			device->getSceneManager(), 666),
		device->getSceneManager(),
		tsrc, this, device
	),
	m_particle_manager(&m_env),
	m_con(PROTOCOL_ID, 512, CONNECTION_TIMEOUT, ipv6, this),
	m_address_name(address_name),
	m_device(device),
	m_camera(NULL),
	m_minimap(NULL),
	m_minimap_disabled_by_server(false),
	m_server_ser_ver(SER_FMT_VER_INVALID),
	m_proto_ver(0),
	m_playeritem(0),
	m_inventory_updated(false),
	m_inventory_from_server(NULL),
	m_inventory_from_server_age(0.0),
	m_animation_time(0),
	m_crack_level(-1),
	m_crack_pos(0,0,0),
	m_last_chat_message_sent(time(NULL)),
	m_chat_message_allowance(5.0f),
	m_map_seed(0),
	m_password(password),
	m_chosen_auth_mech(AUTH_MECHANISM_NONE),
	m_auth_data(NULL),
	m_access_denied(false),
	m_access_denied_reconnect(false),
	m_itemdef_received(false),
	m_nodedef_received(false),
	m_media_downloader(new ClientMediaDownloader()),
	m_time_of_day_set(false),
	m_last_time_of_day_f(-1),
	m_time_of_day_update_timer(0),
	m_recommended_send_interval(0.1),
	m_removed_sounds_check_timer(0),
	m_state(LC_Created),
	m_localdb(NULL),
	m_script(NULL),
	m_mod_storage_save_timer(10.0f),
	m_game_ui_flags(game_ui_flags),
	m_shutdown(false)
{
	// Add local player
	m_env.setLocalPlayer(new LocalPlayer(this, playername));

	if (g_settings->getBool("enable_minimap")) {
		m_minimap = new Minimap(device, this);
	}
	m_cache_save_interval = g_settings->getU16("server_map_save_interval");

	m_modding_enabled = g_settings->getBool("enable_client_modding");
	m_script = new ClientScripting(this);
	m_env.setScript(m_script);
	m_script->setEnv(&m_env);
}

void Client::initMods()
{
	m_script->loadMod(getBuiltinLuaPath() + DIR_DELIM "init.lua", BUILTIN_MOD_NAME);

	// If modding is not enabled, don't load mods, just builtin
	if (!m_modding_enabled) {
		return;
	}

	ClientModConfiguration modconf(getClientModsLuaPath());
	std::vector<ModSpec> mods = modconf.getMods();
	std::vector<ModSpec> unsatisfied_mods = modconf.getUnsatisfiedMods();
	// complain about mods with unsatisfied dependencies
	if (!modconf.isConsistent()) {
		modconf.printUnsatisfiedModsError();
	}

	// Print mods
	infostream << "Client Loading mods: ";
	for (std::vector<ModSpec>::const_iterator i = mods.begin();
		i != mods.end(); ++i) {
		infostream << (*i).name << " ";
	}

	infostream << std::endl;
	// Load and run "mod" scripts
	for (std::vector<ModSpec>::const_iterator it = mods.begin();
		it != mods.end(); ++it) {
		const ModSpec &mod = *it;
		if (!string_allowed(mod.name, MODNAME_ALLOWED_CHARS)) {
			throw ModError("Error loading mod \"" + mod.name +
				"\": Mod name does not follow naming conventions: "
					"Only characters [a-z0-9_] are allowed.");
		}
		std::string script_path = mod.path + DIR_DELIM + "init.lua";
		infostream << "  [" << padStringRight(mod.name, 12) << "] [\""
			<< script_path << "\"]" << std::endl;
		m_script->loadMod(script_path, mod.name);
	}
}

const std::string &Client::getBuiltinLuaPath()
{
	static const std::string builtin_dir = porting::path_share + DIR_DELIM + "builtin";
	return builtin_dir;
}

const std::string &Client::getClientModsLuaPath()
{
	static const std::string clientmods_dir = porting::path_share + DIR_DELIM + "clientmods";
	return clientmods_dir;
}

const std::vector<ModSpec>& Client::getMods() const
{
	static std::vector<ModSpec> client_modspec_temp;
	return client_modspec_temp;
}

const ModSpec* Client::getModSpec(const std::string &modname) const
{
	return NULL;
}

void Client::Stop()
{
	m_shutdown = true;
	// Don't disable this part when modding is disabled, it's used in builtin
	m_script->on_shutdown();
	//request all client managed threads to stop
	m_mesh_update_thread.stop();
	// Save local server map
	if (m_localdb) {
		infostream << "Local map saving ended." << std::endl;
		m_localdb->endSave();
	}

	delete m_script;
}

bool Client::isShutdown()
{
	return m_shutdown || !m_mesh_update_thread.isRunning();
}

Client::~Client()
{
	m_shutdown = true;
	m_con.Disconnect();

	m_mesh_update_thread.stop();
	m_mesh_update_thread.wait();
	while (!m_mesh_update_thread.m_queue_out.empty()) {
		MeshUpdateResult r = m_mesh_update_thread.m_queue_out.pop_frontNoEx();
		delete r.mesh;
	}

	delete m_inventory_from_server;

	// Delete detached inventories
	for (UNORDERED_MAP<std::string, Inventory*>::iterator
			i = m_detached_inventories.begin();
			i != m_detached_inventories.end(); ++i) {
		delete i->second;
	}

	// cleanup 3d model meshes on client shutdown
	while (m_device->getSceneManager()->getMeshCache()->getMeshCount() != 0) {
		scene::IAnimatedMesh *mesh =
			m_device->getSceneManager()->getMeshCache()->getMeshByIndex(0);

		if (mesh != NULL)
			m_device->getSceneManager()->getMeshCache()->removeMesh(mesh);
	}

	delete m_minimap;
}

void Client::connect(Address address, bool is_local_server)
{
	DSTACK(FUNCTION_NAME);

	initLocalMapSaving(address, m_address_name, is_local_server);

	m_con.SetTimeoutMs(0);
	m_con.Connect(address);
}

void Client::step(float dtime)
{
	DSTACK(FUNCTION_NAME);

	// Limit a bit
	if(dtime > 2.0)
		dtime = 2.0;

	if(m_ignore_damage_timer > dtime)
		m_ignore_damage_timer -= dtime;
	else
		m_ignore_damage_timer = 0.0;

	m_animation_time += dtime;
	if(m_animation_time > 60.0)
		m_animation_time -= 60.0;

	m_time_of_day_update_timer += dtime;

	ReceiveAll();

	/*
		Packet counter
	*/
	{
		float &counter = m_packetcounter_timer;
		counter -= dtime;
		if(counter <= 0.0)
		{
			counter = 20.0;

			infostream << "Client packetcounter (" << m_packetcounter_timer
					<< "):"<<std::endl;
			m_packetcounter.print(infostream);
			m_packetcounter.clear();
		}
	}

	// UGLY hack to fix 2 second startup delay caused by non existent
	// server client startup synchronization in local server or singleplayer mode
	static bool initial_step = true;
	if (initial_step) {
		initial_step = false;
	}
	else if(m_state == LC_Created) {
		float &counter = m_connection_reinit_timer;
		counter -= dtime;
		if(counter <= 0.0) {
			counter = 2.0;

			LocalPlayer *myplayer = m_env.getLocalPlayer();
			FATAL_ERROR_IF(myplayer == NULL, "Local player not found in environment.");

			u16 proto_version_min = g_settings->getFlag("send_pre_v25_init") ?
				CLIENT_PROTOCOL_VERSION_MIN_LEGACY : CLIENT_PROTOCOL_VERSION_MIN;

			if (proto_version_min < 25) {
				// Send TOSERVER_INIT_LEGACY
				// [0] u16 TOSERVER_INIT_LEGACY
				// [2] u8 SER_FMT_VER_HIGHEST_READ
				// [3] u8[20] player_name
				// [23] u8[28] password (new in some version)
				// [51] u16 minimum supported network protocol version (added sometime)
				// [53] u16 maximum supported network protocol version (added later than the previous one)

				char pName[PLAYERNAME_SIZE];
				char pPassword[PASSWORD_SIZE];
				memset(pName, 0, PLAYERNAME_SIZE * sizeof(char));
				memset(pPassword, 0, PASSWORD_SIZE * sizeof(char));

				std::string hashed_password = translate_password(myplayer->getName(), m_password);
				snprintf(pName, PLAYERNAME_SIZE, "%s", myplayer->getName());
				snprintf(pPassword, PASSWORD_SIZE, "%s", hashed_password.c_str());

				sendLegacyInit(pName, pPassword);
			}
			if (CLIENT_PROTOCOL_VERSION_MAX >= 25)
				sendInit(myplayer->getName());
		}

		// Not connected, return
		return;
	}

	/*
		Do stuff if connected
	*/

	/*
		Run Map's timers and unload unused data
	*/
	const float map_timer_and_unload_dtime = 5.25;
	if(m_map_timer_and_unload_interval.step(dtime, map_timer_and_unload_dtime)) {
		ScopeProfiler sp(g_profiler, "Client: map timer and unload");
		std::vector<v3s16> deleted_blocks;
		m_env.getMap().timerUpdate(map_timer_and_unload_dtime,
			g_settings->getFloat("client_unload_unused_data_timeout"),
			g_settings->getS32("client_mapblock_limit"),
			&deleted_blocks);

		/*
			Send info to server
			NOTE: This loop is intentionally iterated the way it is.
		*/

		std::vector<v3s16>::iterator i = deleted_blocks.begin();
		std::vector<v3s16> sendlist;
		for(;;) {
			if(sendlist.size() == 255 || i == deleted_blocks.end()) {
				if(sendlist.empty())
					break;
				/*
					[0] u16 command
					[2] u8 count
					[3] v3s16 pos_0
					[3+6] v3s16 pos_1
					...
				*/

				sendDeletedBlocks(sendlist);

				if(i == deleted_blocks.end())
					break;

				sendlist.clear();
			}

			sendlist.push_back(*i);
			++i;
		}
	}

	/*
		Send pending messages on out chat queue
	*/
	if (!m_out_chat_queue.empty() && canSendChatMessage()) {
		sendChatMessage(m_out_chat_queue.front());
		m_out_chat_queue.pop();
	}

	/*
		Handle environment
	*/
	// Control local player (0ms)
	LocalPlayer *player = m_env.getLocalPlayer();
	assert(player != NULL);
	player->applyControl(dtime);

	// Step environment
	m_env.step(dtime);
	m_sound->step(dtime);

	/*
		Get events
	*/
	while (m_env.hasClientEnvEvents()) {
		ClientEnvEvent envEvent = m_env.getClientEnvEvent();

		if (envEvent.type == CEE_PLAYER_DAMAGE) {
			if (m_ignore_damage_timer <= 0) {
				u8 damage = envEvent.player_damage.amount;

				if (envEvent.player_damage.send_to_server)
					sendDamage(damage);

				// Add to ClientEvent queue
				ClientEvent event;
				event.type = CE_PLAYER_DAMAGE;
				event.player_damage.amount = damage;
				m_client_event_queue.push(event);
			}
		}
		// Protocol v29 or greater obsoleted this event
		else if (envEvent.type == CEE_PLAYER_BREATH && m_proto_ver < 29) {
			u16 breath = envEvent.player_breath.amount;
			sendBreath(breath);
		}
	}

	/*
		Print some info
	*/
	float &counter = m_avg_rtt_timer;
	counter += dtime;
	if(counter >= 10) {
		counter = 0.0;
		// connectedAndInitialized() is true, peer exists.
		float avg_rtt = getRTT();
		infostream << "Client: avg_rtt=" << avg_rtt << std::endl;
	}

	/*
		Send player position to server
	*/
	{
		float &counter = m_playerpos_send_timer;
		counter += dtime;
		if((m_state == LC_Ready) && (counter >= m_recommended_send_interval))
		{
			counter = 0.0;
			sendPlayerPos();
		}
	}

	/*
		Replace updated meshes
	*/
	{
		int num_processed_meshes = 0;
		while (!m_mesh_update_thread.m_queue_out.empty())
		{
			num_processed_meshes++;

			MinimapMapblock *minimap_mapblock = NULL;
			bool do_mapper_update = true;

			MeshUpdateResult r = m_mesh_update_thread.m_queue_out.pop_frontNoEx();
			MapBlock *block = m_env.getMap().getBlockNoCreateNoEx(r.p);
			if (block) {
				// Delete the old mesh
				if (block->mesh != NULL) {
					delete block->mesh;
					block->mesh = NULL;
				}

				if (r.mesh) {
					minimap_mapblock = r.mesh->moveMinimapMapblock();
					if (minimap_mapblock == NULL)
						do_mapper_update = false;

					bool is_empty = true;
					for (int l = 0; l < MAX_TILE_LAYERS; l++)
						if (r.mesh->getMesh(l)->getMeshBufferCount() != 0)
							is_empty = false;

					if (is_empty)
						delete r.mesh;
					else
						// Replace with the new mesh
						block->mesh = r.mesh;
				}
			} else {
				delete r.mesh;
			}

			if (m_minimap && do_mapper_update)
				m_minimap->addBlock(r.p, minimap_mapblock);

			if (r.ack_block_to_server) {
				/*
					Acknowledge block
					[0] u8 count
					[1] v3s16 pos_0
				*/
				sendGotBlocks(r.p);
			}
		}

		if (num_processed_meshes > 0)
			g_profiler->graphAdd("num_processed_meshes", num_processed_meshes);
	}

	/*
		Load fetched media
	*/
	if (m_media_downloader && m_media_downloader->isStarted()) {
		m_media_downloader->step(this);
		if (m_media_downloader->isDone()) {
			delete m_media_downloader;
			m_media_downloader = NULL;
		}
	}

	/*
		If the server didn't update the inventory in a while, revert
		the local inventory (so the player notices the lag problem
		and knows something is wrong).
	*/
	if(m_inventory_from_server)
	{
		float interval = 10.0;
		float count_before = floor(m_inventory_from_server_age / interval);

		m_inventory_from_server_age += dtime;

		float count_after = floor(m_inventory_from_server_age / interval);

		if(count_after != count_before)
		{
			// Do this every <interval> seconds after TOCLIENT_INVENTORY
			// Reset the locally changed inventory to the authoritative inventory
			LocalPlayer *player = m_env.getLocalPlayer();
			player->inventory = *m_inventory_from_server;
			m_inventory_updated = true;
		}
	}

	/*
		Update positions of sounds attached to objects
	*/
	{
		for(UNORDERED_MAP<int, u16>::iterator i = m_sounds_to_objects.begin();
				i != m_sounds_to_objects.end(); ++i) {
			int client_id = i->first;
			u16 object_id = i->second;
			ClientActiveObject *cao = m_env.getActiveObject(object_id);
			if(!cao)
				continue;
			v3f pos = cao->getPosition();
			m_sound->updateSoundPosition(client_id, pos);
		}
	}

	/*
		Handle removed remotely initiated sounds
	*/
	m_removed_sounds_check_timer += dtime;
	if(m_removed_sounds_check_timer >= 2.32) {
		m_removed_sounds_check_timer = 0;
		// Find removed sounds and clear references to them
		std::vector<s32> removed_server_ids;
		for(UNORDERED_MAP<s32, int>::iterator i = m_sounds_server_to_client.begin();
				i != m_sounds_server_to_client.end();) {
			s32 server_id = i->first;
			int client_id = i->second;
			++i;
			if(!m_sound->soundExists(client_id)) {
				m_sounds_server_to_client.erase(server_id);
				m_sounds_client_to_server.erase(client_id);
				m_sounds_to_objects.erase(client_id);
				removed_server_ids.push_back(server_id);
			}
		}

		// Sync to server
		if(!removed_server_ids.empty()) {
			sendRemovedSounds(removed_server_ids);
		}
	}

	m_mod_storage_save_timer -= dtime;
	if (m_mod_storage_save_timer <= 0.0f) {
		verbosestream << "Saving registered mod storages." << std::endl;
		m_mod_storage_save_timer = g_settings->getFloat("server_map_save_interval");
		for (UNORDERED_MAP<std::string, ModMetadata *>::const_iterator
				it = m_mod_storages.begin(); it != m_mod_storages.end(); ++it) {
			if (it->second->isModified()) {
				it->second->save(getModStoragePath());
			}
		}
	}

	// Write server map
	if (m_localdb && m_localdb_save_interval.step(dtime,
			m_cache_save_interval)) {
		m_localdb->endSave();
		m_localdb->beginSave();
	}
}

bool Client::loadMedia(const std::string &data, const std::string &filename)
{
	// Silly irrlicht's const-incorrectness
	Buffer<char> data_rw(data.c_str(), data.size());

	std::string name;

	const char *image_ext[] = {
		".png", ".jpg", ".bmp", ".tga",
		".pcx", ".ppm", ".psd", ".wal", ".rgb",
		NULL
	};
	name = removeStringEnd(filename, image_ext);
	if(name != "")
	{
		verbosestream<<"Client: Attempting to load image "
		<<"file \""<<filename<<"\""<<std::endl;

		io::IFileSystem *irrfs = m_device->getFileSystem();
		video::IVideoDriver *vdrv = m_device->getVideoDriver();

		// Create an irrlicht memory file
		io::IReadFile *rfile = irrfs->createMemoryReadFile(
				*data_rw, data_rw.getSize(), "_tempreadfile");

		FATAL_ERROR_IF(!rfile, "Could not create irrlicht memory file.");

		// Read image
		video::IImage *img = vdrv->createImageFromFile(rfile);
		if(!img){
			errorstream<<"Client: Cannot create image from data of "
					<<"file \""<<filename<<"\""<<std::endl;
			rfile->drop();
			return false;
		}
		else {
			m_tsrc->insertSourceImage(filename, img);
			img->drop();
			rfile->drop();
			return true;
		}
	}

	const char *sound_ext[] = {
		".0.ogg", ".1.ogg", ".2.ogg", ".3.ogg", ".4.ogg",
		".5.ogg", ".6.ogg", ".7.ogg", ".8.ogg", ".9.ogg",
		".ogg", NULL
	};
	name = removeStringEnd(filename, sound_ext);
	if(name != "")
	{
		verbosestream<<"Client: Attempting to load sound "
		<<"file \""<<filename<<"\""<<std::endl;
		m_sound->loadSoundData(name, data);
		return true;
	}

	const char *model_ext[] = {
		".x", ".b3d", ".md2", ".obj",
		NULL
	};
	name = removeStringEnd(filename, model_ext);
	if(name != "")
	{
		verbosestream<<"Client: Storing model into memory: "
				<<"\""<<filename<<"\""<<std::endl;
		if(m_mesh_data.count(filename))
			errorstream<<"Multiple models with name \""<<filename.c_str()
					<<"\" found; replacing previous model"<<std::endl;
		m_mesh_data[filename] = data;
		return true;
	}

	errorstream<<"Client: Don't know how to load file \""
			<<filename<<"\""<<std::endl;
	return false;
}

// Virtual methods from con::PeerHandler
void Client::peerAdded(con::Peer *peer)
{
	infostream << "Client::peerAdded(): peer->id="
			<< peer->id << std::endl;
}
void Client::deletingPeer(con::Peer *peer, bool timeout)
{
	infostream << "Client::deletingPeer(): "
			"Server Peer is getting deleted "
			<< "(timeout=" << timeout << ")" << std::endl;

	if (timeout) {
		m_access_denied = true;
		m_access_denied_reason = gettext("Connection timed out.");
	}
}

/*
	u16 command
	u16 number of files requested
	for each file {
		u16 length of name
		string name
	}
*/
void Client::request_media(const std::vector<std::string> &file_requests)
{
	std::ostringstream os(std::ios_base::binary);
	writeU16(os, TOSERVER_REQUEST_MEDIA);
	size_t file_requests_size = file_requests.size();

	FATAL_ERROR_IF(file_requests_size > 0xFFFF, "Unsupported number of file requests");

	// Packet dynamicly resized
	NetworkPacket pkt(TOSERVER_REQUEST_MEDIA, 2 + 0);

	pkt << (u16) (file_requests_size & 0xFFFF);

	for(std::vector<std::string>::const_iterator i = file_requests.begin();
			i != file_requests.end(); ++i) {
		pkt << (*i);
	}

	Send(&pkt);

	infostream << "Client: Sending media request list to server ("
			<< file_requests.size() << " files. packet size)" << std::endl;
}

void Client::initLocalMapSaving(const Address &address,
		const std::string &hostname,
		bool is_local_server)
{
	if (!g_settings->getBool("enable_local_map_saving") || is_local_server) {
		return;
	}

	const std::string world_path = porting::path_user
		+ DIR_DELIM + "worlds"
		+ DIR_DELIM + "server_"
		+ hostname + "_" + std::to_string(address.getPort());

	fs::CreateAllDirs(world_path);

	m_localdb = new MapDatabaseSQLite3(world_path);
	m_localdb->beginSave();
	actionstream << "Local map saving started, map will be saved at '" << world_path << "'" << std::endl;
}

void Client::ReceiveAll()
{
	DSTACK(FUNCTION_NAME);
	u64 start_ms = porting::getTimeMs();
	for(;;)
	{
		// Limit time even if there would be huge amounts of data to
		// process
		if(porting::getTimeMs() > start_ms + 100)
			break;

		try {
			Receive();
			g_profiler->graphAdd("client_received_packets", 1);
		}
		catch(con::NoIncomingDataException &e) {
			break;
		}
		catch(con::InvalidIncomingDataException &e) {
			infostream<<"Client::ReceiveAll(): "
					"InvalidIncomingDataException: what()="
					<<e.what()<<std::endl;
		}
	}
}

void Client::Receive()
{
	DSTACK(FUNCTION_NAME);
	NetworkPacket pkt;
	m_con.Receive(&pkt);
	ProcessData(&pkt);
}

inline void Client::handleCommand(NetworkPacket* pkt)
{
	const ToClientCommandHandler& opHandle = toClientCommandTable[pkt->getCommand()];
	(this->*opHandle.handler)(pkt);
}

/*
	sender_peer_id given to this shall be quaranteed to be a valid peer
*/
void Client::ProcessData(NetworkPacket *pkt)
{
	DSTACK(FUNCTION_NAME);

	ToClientCommand command = (ToClientCommand) pkt->getCommand();
	u32 sender_peer_id = pkt->getPeerId();

	//infostream<<"Client: received command="<<command<<std::endl;
	m_packetcounter.add((u16)command);

	/*
		If this check is removed, be sure to change the queue
		system to know the ids
	*/
	if(sender_peer_id != PEER_ID_SERVER) {
		infostream << "Client::ProcessData(): Discarding data not "
			"coming from server: peer_id=" << sender_peer_id
			<< std::endl;
		return;
	}

	// Command must be handled into ToClientCommandHandler
	if (command >= TOCLIENT_NUM_MSG_TYPES) {
		infostream << "Client: Ignoring unknown command "
			<< command << std::endl;
		return;
	}

	/*
	 * Those packets are handled before m_server_ser_ver is set, it's normal
	 * But we must use the new ToClientConnectionState in the future,
	 * as a byte mask
	 */
	if(toClientCommandTable[command].state == TOCLIENT_STATE_NOT_CONNECTED) {
		handleCommand(pkt);
		return;
	}

	if(m_server_ser_ver == SER_FMT_VER_INVALID) {
		infostream << "Client: Server serialization"
				" format invalid or not initialized."
				" Skipping incoming command=" << command << std::endl;
		return;
	}

	/*
	  Handle runtime commands
	*/

	handleCommand(pkt);
}

void Client::Send(NetworkPacket* pkt)
{
	m_con.Send(PEER_ID_SERVER,
		serverCommandFactoryTable[pkt->getCommand()].channel,
		pkt,
		serverCommandFactoryTable[pkt->getCommand()].reliable);
}

// Will fill up 12 + 12 + 4 + 4 + 4 bytes
void writePlayerPos(LocalPlayer *myplayer, ClientMap *clientMap, NetworkPacket *pkt)
{
	v3f pf           = myplayer->getPosition() * 100;
	v3f sf           = myplayer->getSpeed() * 100;
	s32 pitch        = myplayer->getPitch() * 100;
	s32 yaw          = myplayer->getYaw() * 100;
	u32 keyPressed   = myplayer->keyPressed;
	// scaled by 80, so that pi can fit into a u8
	u8 fov           = clientMap->getCameraFov() * 80;
	u8 wanted_range  = MYMIN(255,
			std::ceil(clientMap->getControl().wanted_range / MAP_BLOCKSIZE));

	v3s32 position(pf.X, pf.Y, pf.Z);
	v3s32 speed(sf.X, sf.Y, sf.Z);

	/*
		Format:
		[0] v3s32 position*100
		[12] v3s32 speed*100
		[12+12] s32 pitch*100
		[12+12+4] s32 yaw*100
		[12+12+4+4] u32 keyPressed
		[12+12+4+4+4] u8 fov*80
		[12+12+4+4+4+1] u8 ceil(wanted_range / MAP_BLOCKSIZE)
	*/
	*pkt << position << speed << pitch << yaw << keyPressed;
	*pkt << fov << wanted_range;
}

void Client::interact(u8 action, const PointedThing& pointed)
{
	if(m_state != LC_Ready) {
		errorstream << "Client::interact() "
				"Canceled (not connected)"
				<< std::endl;
		return;
	}

	LocalPlayer *myplayer = m_env.getLocalPlayer();
	if (myplayer == NULL)
		return;

	/*
		[0] u16 command
		[2] u8 action
		[3] u16 item
		[5] u32 length of the next item (plen)
		[9] serialized PointedThing
		[9 + plen] player position information
		actions:
		0: start digging (from undersurface) or use
		1: stop digging (all parameters ignored)
		2: digging completed
		3: place block or item (to abovesurface)
		4: use item
		5: perform secondary action of item
	*/

	NetworkPacket pkt(TOSERVER_INTERACT, 1 + 2 + 0);

	pkt << action;
	pkt << (u16)getPlayerItem();

	std::ostringstream tmp_os(std::ios::binary);
	pointed.serialize(tmp_os);

	pkt.putLongString(tmp_os.str());

	writePlayerPos(myplayer, &m_env.getClientMap(), &pkt);

	Send(&pkt);
}

void Client::deleteAuthData()
{
	if (!m_auth_data)
		return;

	switch (m_chosen_auth_mech) {
		case AUTH_MECHANISM_FIRST_SRP:
			break;
		case AUTH_MECHANISM_SRP:
		case AUTH_MECHANISM_LEGACY_PASSWORD:
			srp_user_delete((SRPUser *) m_auth_data);
			m_auth_data = NULL;
			break;
		case AUTH_MECHANISM_NONE:
			break;
	}
	m_chosen_auth_mech = AUTH_MECHANISM_NONE;
}

AuthMechanism Client::choseAuthMech(const u32 mechs)
{
	if (mechs & AUTH_MECHANISM_SRP)
		return AUTH_MECHANISM_SRP;

	if (mechs & AUTH_MECHANISM_FIRST_SRP)
		return AUTH_MECHANISM_FIRST_SRP;

	if (mechs & AUTH_MECHANISM_LEGACY_PASSWORD)
		return AUTH_MECHANISM_LEGACY_PASSWORD;

	return AUTH_MECHANISM_NONE;
}

void Client::sendLegacyInit(const char* playerName, const char* playerPassword)
{
	NetworkPacket pkt(TOSERVER_INIT_LEGACY,
			1 + PLAYERNAME_SIZE + PASSWORD_SIZE + 2 + 2);

	u16 proto_version_min = g_settings->getFlag("send_pre_v25_init") ?
		CLIENT_PROTOCOL_VERSION_MIN_LEGACY : CLIENT_PROTOCOL_VERSION_MIN;

	pkt << (u8) SER_FMT_VER_HIGHEST_READ;
	pkt.putRawString(playerName,PLAYERNAME_SIZE);
	pkt.putRawString(playerPassword, PASSWORD_SIZE);
	pkt << (u16) proto_version_min << (u16) CLIENT_PROTOCOL_VERSION_MAX;

	Send(&pkt);
}

void Client::sendInit(const std::string &playerName)
{
	NetworkPacket pkt(TOSERVER_INIT, 1 + 2 + 2 + (1 + playerName.size()));

	// we don't support network compression yet
	u16 supp_comp_modes = NETPROTO_COMPRESSION_NONE;

	u16 proto_version_min = g_settings->getFlag("send_pre_v25_init") ?
		CLIENT_PROTOCOL_VERSION_MIN_LEGACY : CLIENT_PROTOCOL_VERSION_MIN;

	pkt << (u8) SER_FMT_VER_HIGHEST_READ << (u16) supp_comp_modes;
	pkt << (u16) proto_version_min << (u16) CLIENT_PROTOCOL_VERSION_MAX;
	pkt << playerName;

	Send(&pkt);
}

void Client::startAuth(AuthMechanism chosen_auth_mechanism)
{
	m_chosen_auth_mech = chosen_auth_mechanism;

	switch (chosen_auth_mechanism) {
		case AUTH_MECHANISM_FIRST_SRP: {
			// send srp verifier to server
			std::string verifier;
			std::string salt;
			generate_srp_verifier_and_salt(getPlayerName(), m_password,
				&verifier, &salt);

			NetworkPacket resp_pkt(TOSERVER_FIRST_SRP, 0);
			resp_pkt << salt << verifier << (u8)((m_password == "") ? 1 : 0);

			Send(&resp_pkt);
			break;
		}
		case AUTH_MECHANISM_SRP:
		case AUTH_MECHANISM_LEGACY_PASSWORD: {
			u8 based_on = 1;

			if (chosen_auth_mechanism == AUTH_MECHANISM_LEGACY_PASSWORD) {
				m_password = translate_password(getPlayerName(), m_password);
				based_on = 0;
			}

			std::string playername_u = lowercase(getPlayerName());
			m_auth_data = srp_user_new(SRP_SHA256, SRP_NG_2048,
				getPlayerName().c_str(), playername_u.c_str(),
				(const unsigned char *) m_password.c_str(),
				m_password.length(), NULL, NULL);
			char *bytes_A = 0;
			size_t len_A = 0;
			SRP_Result res = srp_user_start_authentication(
				(struct SRPUser *) m_auth_data, NULL, NULL, 0,
				(unsigned char **) &bytes_A, &len_A);
			FATAL_ERROR_IF(res != SRP_OK, "Creating local SRP user failed.");

			NetworkPacket resp_pkt(TOSERVER_SRP_BYTES_A, 0);
			resp_pkt << std::string(bytes_A, len_A) << based_on;
			Send(&resp_pkt);
			break;
		}
		case AUTH_MECHANISM_NONE:
			break; // not handled in this method
	}
}

void Client::sendDeletedBlocks(std::vector<v3s16> &blocks)
{
	NetworkPacket pkt(TOSERVER_DELETEDBLOCKS, 1 + sizeof(v3s16) * blocks.size());

	pkt << (u8) blocks.size();

	u32 k = 0;
	for(std::vector<v3s16>::iterator
			j = blocks.begin();
			j != blocks.end(); ++j) {
		pkt << *j;
		k++;
	}

	Send(&pkt);
}

void Client::sendGotBlocks(v3s16 block)
{
	NetworkPacket pkt(TOSERVER_GOTBLOCKS, 1 + 6);
	pkt << (u8) 1 << block;
	Send(&pkt);
}

void Client::sendRemovedSounds(std::vector<s32> &soundList)
{
	size_t server_ids = soundList.size();
	assert(server_ids <= 0xFFFF);

	NetworkPacket pkt(TOSERVER_REMOVED_SOUNDS, 2 + server_ids * 4);

	pkt << (u16) (server_ids & 0xFFFF);

	for(std::vector<s32>::iterator i = soundList.begin();
			i != soundList.end(); ++i)
		pkt << *i;

	Send(&pkt);
}

void Client::sendNodemetaFields(v3s16 p, const std::string &formname,
		const StringMap &fields)
{
	size_t fields_size = fields.size();

	FATAL_ERROR_IF(fields_size > 0xFFFF, "Unsupported number of nodemeta fields");

	NetworkPacket pkt(TOSERVER_NODEMETA_FIELDS, 0);

	pkt << p << formname << (u16) (fields_size & 0xFFFF);

	StringMap::const_iterator it;
	for (it = fields.begin(); it != fields.end(); ++it) {
		const std::string &name = it->first;
		const std::string &value = it->second;
		pkt << name;
		pkt.putLongString(value);
	}

	Send(&pkt);
}

void Client::sendInventoryFields(const std::string &formname,
		const StringMap &fields)
{
	size_t fields_size = fields.size();
	FATAL_ERROR_IF(fields_size > 0xFFFF, "Unsupported number of inventory fields");

	NetworkPacket pkt(TOSERVER_INVENTORY_FIELDS, 0);
	pkt << formname << (u16) (fields_size & 0xFFFF);

	StringMap::const_iterator it;
	for (it = fields.begin(); it != fields.end(); ++it) {
		const std::string &name  = it->first;
		const std::string &value = it->second;
		pkt << name;
		pkt.putLongString(value);
	}

	Send(&pkt);
}

void Client::sendInventoryAction(InventoryAction *a)
{
	std::ostringstream os(std::ios_base::binary);

	a->serialize(os);

	// Make data buffer
	std::string s = os.str();

	NetworkPacket pkt(TOSERVER_INVENTORY_ACTION, s.size());
	pkt.putRawString(s.c_str(),s.size());

	Send(&pkt);
}

bool Client::canSendChatMessage() const
{
	u32 now = time(NULL);
	float time_passed = now - m_last_chat_message_sent;

	float virt_chat_message_allowance = m_chat_message_allowance + time_passed *
			(CLIENT_CHAT_MESSAGE_LIMIT_PER_10S / 8.0f);

	if (virt_chat_message_allowance < 1.0f)
		return false;

	return true;
}

void Client::sendChatMessage(const std::wstring &message)
{
	const s16 max_queue_size = g_settings->getS16("max_out_chat_queue_size");
	if (canSendChatMessage()) {
		u32 now = time(NULL);
		float time_passed = now - m_last_chat_message_sent;
		m_last_chat_message_sent = time(NULL);

		m_chat_message_allowance += time_passed * (CLIENT_CHAT_MESSAGE_LIMIT_PER_10S / 8.0f);
		if (m_chat_message_allowance > CLIENT_CHAT_MESSAGE_LIMIT_PER_10S)
			m_chat_message_allowance = CLIENT_CHAT_MESSAGE_LIMIT_PER_10S;

		m_chat_message_allowance -= 1.0f;

		NetworkPacket pkt(TOSERVER_CHAT_MESSAGE, 2 + message.size() * sizeof(u16));

		pkt << message;

		Send(&pkt);
	} else if (m_out_chat_queue.size() < (u16) max_queue_size || max_queue_size == -1) {
		m_out_chat_queue.push(message);
	} else {
		infostream << "Could not queue chat message because maximum out chat queue size ("
				<< max_queue_size << ") is reached." << std::endl;
	}
}

void Client::clearOutChatQueue()
{
	m_out_chat_queue = std::queue<std::wstring>();
}

void Client::sendChangePassword(const std::string &oldpassword,
        const std::string &newpassword)
{
	LocalPlayer *player = m_env.getLocalPlayer();
	if (player == NULL)
		return;

	std::string playername = player->getName();
	if (m_proto_ver >= 25) {
		// get into sudo mode and then send new password to server
		m_password = oldpassword;
		m_new_password = newpassword;
		startAuth(choseAuthMech(m_sudo_auth_methods));
	} else {
		std::string oldpwd = translate_password(playername, oldpassword);
		std::string newpwd = translate_password(playername, newpassword);

		NetworkPacket pkt(TOSERVER_PASSWORD_LEGACY, 2 * PASSWORD_SIZE);

		for (u8 i = 0; i < PASSWORD_SIZE; i++) {
			pkt << (u8) (i < oldpwd.length() ? oldpwd[i] : 0);
		}

		for (u8 i = 0; i < PASSWORD_SIZE; i++) {
			pkt << (u8) (i < newpwd.length() ? newpwd[i] : 0);
		}
		Send(&pkt);
	}
}

void Client::sendDamage(u8 damage)
{
	DSTACK(FUNCTION_NAME);

	NetworkPacket pkt(TOSERVER_DAMAGE, sizeof(u8));
	pkt << damage;
	Send(&pkt);
}

void Client::sendBreath(u16 breath)
{
	DSTACK(FUNCTION_NAME);

	// Protocol v29 make this obsolete
	if (m_proto_ver >= 29)
		return;

	NetworkPacket pkt(TOSERVER_BREATH, sizeof(u16));
	pkt << breath;
	Send(&pkt);
}

void Client::sendRespawn()
{
	DSTACK(FUNCTION_NAME);

	NetworkPacket pkt(TOSERVER_RESPAWN, 0);
	Send(&pkt);
}

void Client::sendReady()
{
	DSTACK(FUNCTION_NAME);

	NetworkPacket pkt(TOSERVER_CLIENT_READY,
			1 + 1 + 1 + 1 + 2 + sizeof(char) * strlen(g_version_hash));

	pkt << (u8) VERSION_MAJOR << (u8) VERSION_MINOR << (u8) VERSION_PATCH
		<< (u8) 0 << (u16) strlen(g_version_hash);

	pkt.putRawString(g_version_hash, (u16) strlen(g_version_hash));
	Send(&pkt);
}

void Client::sendPlayerPos()
{
	LocalPlayer *myplayer = m_env.getLocalPlayer();
	if(myplayer == NULL)
		return;

	ClientMap &map = m_env.getClientMap();

	u8 camera_fov    = map.getCameraFov();
	u8 wanted_range  = map.getControl().wanted_range;

	// Save bandwidth by only updating position when something changed
	if(myplayer->last_position        == myplayer->getPosition() &&
			myplayer->last_speed        == myplayer->getSpeed()    &&
			myplayer->last_pitch        == myplayer->getPitch()    &&
			myplayer->last_yaw          == myplayer->getYaw()      &&
			myplayer->last_keyPressed   == myplayer->keyPressed    &&
			myplayer->last_camera_fov   == camera_fov              &&
			myplayer->last_wanted_range == wanted_range)
		return;

	myplayer->last_position     = myplayer->getPosition();
	myplayer->last_speed        = myplayer->getSpeed();
	myplayer->last_pitch        = myplayer->getPitch();
	myplayer->last_yaw          = myplayer->getYaw();
	myplayer->last_keyPressed   = myplayer->keyPressed;
	myplayer->last_camera_fov   = camera_fov;
	myplayer->last_wanted_range = wanted_range;

	//infostream << "Sending Player Position information" << std::endl;

	u16 our_peer_id;
	{
		//MutexAutoLock lock(m_con_mutex); //bulk comment-out
		our_peer_id = m_con.GetPeerID();
	}

	// Set peer id if not set already
	if(myplayer->peer_id == PEER_ID_INEXISTENT)
		myplayer->peer_id = our_peer_id;

	assert(myplayer->peer_id == our_peer_id);

	NetworkPacket pkt(TOSERVER_PLAYERPOS, 12 + 12 + 4 + 4 + 4 + 1 + 1);

	writePlayerPos(myplayer, &map, &pkt);

	Send(&pkt);
}

void Client::sendPlayerItem(u16 item)
{
	LocalPlayer *myplayer = m_env.getLocalPlayer();
	if(myplayer == NULL)
		return;

	u16 our_peer_id = m_con.GetPeerID();

	// Set peer id if not set already
	if(myplayer->peer_id == PEER_ID_INEXISTENT)
		myplayer->peer_id = our_peer_id;
	assert(myplayer->peer_id == our_peer_id);

	NetworkPacket pkt(TOSERVER_PLAYERITEM, 2);

	pkt << item;

	Send(&pkt);
}

void Client::removeNode(v3s16 p)
{
	std::map<v3s16, MapBlock*> modified_blocks;

	try {
		m_env.getMap().removeNodeAndUpdate(p, modified_blocks);
	}
	catch(InvalidPositionException &e) {
	}

	for(std::map<v3s16, MapBlock *>::iterator
			i = modified_blocks.begin();
			i != modified_blocks.end(); ++i) {
		addUpdateMeshTaskWithEdge(i->first, false, true);
	}
}

MapNode Client::getNode(v3s16 p, bool *is_valid_position)
{
	return m_env.getMap().getNodeNoEx(p, is_valid_position);
}

void Client::addNode(v3s16 p, MapNode n, bool remove_metadata)
{
	//TimeTaker timer1("Client::addNode()");

	std::map<v3s16, MapBlock*> modified_blocks;

	try {
		//TimeTaker timer3("Client::addNode(): addNodeAndUpdate");
		m_env.getMap().addNodeAndUpdate(p, n, modified_blocks, remove_metadata);
	}
	catch(InvalidPositionException &e) {
	}

	for(std::map<v3s16, MapBlock *>::iterator
			i = modified_blocks.begin();
			i != modified_blocks.end(); ++i) {
		addUpdateMeshTaskWithEdge(i->first, false, true);
	}
}

void Client::setPlayerControl(PlayerControl &control)
{
	LocalPlayer *player = m_env.getLocalPlayer();
	assert(player != NULL);
	player->control = control;
}

void Client::selectPlayerItem(u16 item)
{
	m_playeritem = item;
	m_inventory_updated = true;
	sendPlayerItem(item);
}

// Returns true if the inventory of the local player has been
// updated from the server. If it is true, it is set to false.
bool Client::getLocalInventoryUpdated()
{
	bool updated = m_inventory_updated;
	m_inventory_updated = false;
	return updated;
}

// Copies the inventory of the local player to parameter
void Client::getLocalInventory(Inventory &dst)
{
	LocalPlayer *player = m_env.getLocalPlayer();
	assert(player != NULL);
	dst = player->inventory;
}

Inventory* Client::getInventory(const InventoryLocation &loc)
{
	switch(loc.type){
	case InventoryLocation::UNDEFINED:
	{}
	break;
	case InventoryLocation::CURRENT_PLAYER:
	{
		LocalPlayer *player = m_env.getLocalPlayer();
		assert(player != NULL);
		return &player->inventory;
	}
	break;
	case InventoryLocation::PLAYER:
	{
		// Check if we are working with local player inventory
		LocalPlayer *player = m_env.getLocalPlayer();
		if (!player || strcmp(player->getName(), loc.name.c_str()) != 0)
			return NULL;
		return &player->inventory;
	}
	break;
	case InventoryLocation::NODEMETA:
	{
		NodeMetadata *meta = m_env.getMap().getNodeMetadata(loc.p);
		if(!meta)
			return NULL;
		return meta->getInventory();
	}
	break;
	case InventoryLocation::DETACHED:
	{
		if (m_detached_inventories.count(loc.name) == 0)
			return NULL;
		return m_detached_inventories[loc.name];
	}
	break;
	default:
		FATAL_ERROR("Invalid inventory location type.");
		break;
	}
	return NULL;
}

void Client::inventoryAction(InventoryAction *a)
{
	/*
		Send it to the server
	*/
	sendInventoryAction(a);

	/*
		Predict some local inventory changes
	*/
	a->clientApply(this, this);

	// Remove it
	delete a;
}

float Client::getAnimationTime()
{
	return m_animation_time;
}

int Client::getCrackLevel()
{
	return m_crack_level;
}

v3s16 Client::getCrackPos()
{
	return m_crack_pos;
}

void Client::setCrack(int level, v3s16 pos)
{
	int old_crack_level = m_crack_level;
	v3s16 old_crack_pos = m_crack_pos;

	m_crack_level = level;
	m_crack_pos = pos;

	if(old_crack_level >= 0 && (level < 0 || pos != old_crack_pos))
	{
		// remove old crack
		addUpdateMeshTaskForNode(old_crack_pos, false, true);
	}
	if(level >= 0 && (old_crack_level < 0 || pos != old_crack_pos))
	{
		// add new crack
		addUpdateMeshTaskForNode(pos, false, true);
	}
}

u16 Client::getHP()
{
	LocalPlayer *player = m_env.getLocalPlayer();
	assert(player != NULL);
	return player->hp;
}

bool Client::getChatMessage(std::wstring &message)
{
	if(m_chat_queue.size() == 0)
		return false;
	message = m_chat_queue.front();
	m_chat_queue.pop();
	return true;
}

void Client::typeChatMessage(const std::wstring &message)
{
	// Discard empty line
	if(message == L"")
		return;

	// If message was ate by script API, don't send it to server
	if (m_script->on_sending_message(wide_to_utf8(message))) {
		return;
	}

	// Send to others
	sendChatMessage(message);

	// Show locally
	if (message[0] != L'/')
	{
		// compatibility code
		if (m_proto_ver < 29) {
			LocalPlayer *player = m_env.getLocalPlayer();
			assert(player != NULL);
			std::wstring name = narrow_to_wide(player->getName());
			pushToChatQueue((std::wstring)L"<" + name + L"> " + message);
		}
	}
}

void Client::addUpdateMeshTask(v3s16 p, bool ack_to_server, bool urgent)
{
	// Check if the block exists to begin with. In the case when a non-existing
	// neighbor is automatically added, it may not. In that case we don't want
	// to tell the mesh update thread about it.
	MapBlock *b = m_env.getMap().getBlockNoCreateNoEx(p);
	if (b == NULL)
		return;

	m_mesh_update_thread.updateBlock(&m_env.getMap(), p, ack_to_server, urgent);
}

void Client::addUpdateMeshTaskWithEdge(v3s16 blockpos, bool ack_to_server, bool urgent)
{
	try{
		addUpdateMeshTask(blockpos, ack_to_server, urgent);
	}
	catch(InvalidPositionException &e){}

	// Leading edge
	for (int i=0;i<6;i++)
	{
		try{
			v3s16 p = blockpos + g_6dirs[i];
			addUpdateMeshTask(p, false, urgent);
		}
		catch(InvalidPositionException &e){}
	}
}

void Client::addUpdateMeshTaskForNode(v3s16 nodepos, bool ack_to_server, bool urgent)
{
	{
		v3s16 p = nodepos;
		infostream<<"Client::addUpdateMeshTaskForNode(): "
				<<"("<<p.X<<","<<p.Y<<","<<p.Z<<")"
				<<std::endl;
	}

	v3s16 blockpos          = getNodeBlockPos(nodepos);
	v3s16 blockpos_relative = blockpos * MAP_BLOCKSIZE;

	try{
		addUpdateMeshTask(blockpos, ack_to_server, urgent);
	}
	catch(InvalidPositionException &e) {}

	// Leading edge
	if(nodepos.X == blockpos_relative.X){
		try{
			v3s16 p = blockpos + v3s16(-1,0,0);
			addUpdateMeshTask(p, false, urgent);
		}
		catch(InvalidPositionException &e){}
	}

	if(nodepos.Y == blockpos_relative.Y){
		try{
			v3s16 p = blockpos + v3s16(0,-1,0);
			addUpdateMeshTask(p, false, urgent);
		}
		catch(InvalidPositionException &e){}
	}

	if(nodepos.Z == blockpos_relative.Z){
		try{
			v3s16 p = blockpos + v3s16(0,0,-1);
			addUpdateMeshTask(p, false, urgent);
		}
		catch(InvalidPositionException &e){}
	}
}

ClientEvent Client::getClientEvent()
{
	FATAL_ERROR_IF(m_client_event_queue.empty(),
			"Cannot getClientEvent, queue is empty.");

	ClientEvent event = m_client_event_queue.front();
	m_client_event_queue.pop();
	return event;
}

float Client::mediaReceiveProgress()
{
	if (m_media_downloader)
		return m_media_downloader->getProgress();
	else
		return 1.0; // downloader only exists when not yet done
}

typedef struct TextureUpdateArgs {
	IrrlichtDevice *device;
	gui::IGUIEnvironment *guienv;
	u64 last_time_ms;
	u16 last_percent;
	const wchar_t* text_base;
	ITextureSource *tsrc;
} TextureUpdateArgs;

void texture_update_progress(void *args, u32 progress, u32 max_progress)
{
		TextureUpdateArgs* targs = (TextureUpdateArgs*) args;
		u16 cur_percent = ceil(progress / (double) max_progress * 100.);

		// update the loading menu -- if neccessary
		bool do_draw = false;
		u64 time_ms = targs->last_time_ms;
		if (cur_percent != targs->last_percent) {
			targs->last_percent = cur_percent;
			time_ms = porting::getTimeMs();
			// only draw when the user will notice something:
			do_draw = (time_ms - targs->last_time_ms > 100);
		}

		if (do_draw) {
			targs->last_time_ms = time_ms;
			std::basic_stringstream<wchar_t> strm;
			strm << targs->text_base << " " << targs->last_percent << "%...";
			draw_load_screen(strm.str(), targs->device, targs->guienv, targs->tsrc, 0,
				72 + (u16) ((18. / 100.) * (double) targs->last_percent), true);
		}
}

void Client::afterContentReceived(IrrlichtDevice *device)
{
	infostream<<"Client::afterContentReceived() started"<<std::endl;
	assert(m_itemdef_received); // pre-condition
	assert(m_nodedef_received); // pre-condition
	assert(mediaReceived()); // pre-condition

	const wchar_t* text = wgettext("Loading textures...");

	// Clear cached pre-scaled 2D GUI images, as this cache
	// might have images with the same name but different
	// content from previous sessions.
	guiScalingCacheClear(device->getVideoDriver());

	// Rebuild inherited images and recreate textures
	infostream<<"- Rebuilding images and textures"<<std::endl;
	draw_load_screen(text,device, guienv, m_tsrc, 0, 70);
	m_tsrc->rebuildImagesAndTextures();
	delete[] text;

	// Rebuild shaders
	infostream<<"- Rebuilding shaders"<<std::endl;
	text = wgettext("Rebuilding shaders...");
	draw_load_screen(text, device, guienv, m_tsrc, 0, 71);
	m_shsrc->rebuildShaders();
	delete[] text;

	// Update node aliases
	infostream<<"- Updating node aliases"<<std::endl;
	text = wgettext("Initializing nodes...");
	draw_load_screen(text, device, guienv, m_tsrc, 0, 72);
	m_nodedef->updateAliases(m_itemdef);
	std::string texture_path = g_settings->get("texture_path");
	if (texture_path != "" && fs::IsDir(texture_path))
		m_nodedef->applyTextureOverrides(texture_path + DIR_DELIM + "override.txt");
	m_nodedef->setNodeRegistrationStatus(true);
	m_nodedef->runNodeResolveCallbacks();
	delete[] text;

	// Update node textures and assign shaders to each tile
	infostream<<"- Updating node textures"<<std::endl;
	TextureUpdateArgs tu_args;
	tu_args.device = device;
	tu_args.guienv = guienv;
	tu_args.last_time_ms = porting::getTimeMs();
	tu_args.last_percent = 0;
	tu_args.text_base =  wgettext("Initializing nodes");
	tu_args.tsrc = m_tsrc;
	m_nodedef->updateTextures(this, texture_update_progress, &tu_args);
	delete[] tu_args.text_base;

	// Start mesh update thread after setting up content definitions
	infostream<<"- Starting mesh update thread"<<std::endl;
	m_mesh_update_thread.start();

	m_state = LC_Ready;
	sendReady();

	if (g_settings->getBool("enable_client_modding")) {
		m_script->on_client_ready(m_env.getLocalPlayer());
		m_script->on_connect();
	}

	text = wgettext("Done!");
	draw_load_screen(text, device, guienv, m_tsrc, 0, 100);
	infostream<<"Client::afterContentReceived() done"<<std::endl;
	delete[] text;
}

float Client::getRTT()
{
	return m_con.getPeerStat(PEER_ID_SERVER,con::AVG_RTT);
}

float Client::getCurRate()
{
	return (m_con.getLocalStat(con::CUR_INC_RATE) +
			m_con.getLocalStat(con::CUR_DL_RATE));
}

void Client::makeScreenshot(IrrlichtDevice *device)
{
	irr::video::IVideoDriver *driver = device->getVideoDriver();
	irr::video::IImage* const raw_image = driver->createScreenShot();

	if (!raw_image)
		return;

	time_t t = time(NULL);
	struct tm *tm = localtime(&t);

	char timetstamp_c[64];
	strftime(timetstamp_c, sizeof(timetstamp_c), "%Y%m%d_%H%M%S", tm);

	std::string filename_base = g_settings->get("screenshot_path")
			+ DIR_DELIM
			+ std::string("screenshot_")
			+ std::string(timetstamp_c);
	std::string filename_ext = "." + g_settings->get("screenshot_format");
	std::string filename;

	u32 quality = (u32)g_settings->getS32("screenshot_quality");
	quality = MYMIN(MYMAX(quality, 0), 100) / 100.0 * 255;

	// Try to find a unique filename
	unsigned serial = 0;

	while (serial < SCREENSHOT_MAX_SERIAL_TRIES) {
		filename = filename_base + (serial > 0 ? ("_" + itos(serial)) : "") + filename_ext;
		std::ifstream tmp(filename.c_str());
		if (!tmp.good())
			break;	// File did not apparently exist, we'll go with it
		serial++;
	}

	if (serial == SCREENSHOT_MAX_SERIAL_TRIES) {
		infostream << "Could not find suitable filename for screenshot" << std::endl;
	} else {
		irr::video::IImage* const image =
				driver->createImage(video::ECF_R8G8B8, raw_image->getDimension());

		if (image) {
			raw_image->copyTo(image);

			std::ostringstream sstr;
			if (driver->writeImageToFile(image, filename.c_str(), quality)) {
				sstr << "Saved screenshot to '" << filename << "'";
			} else {
				sstr << "Failed to save screenshot '" << filename << "'";
			}
			pushToChatQueue(narrow_to_wide(sstr.str()));
			infostream << sstr.str() << std::endl;
			image->drop();
		}
	}

	raw_image->drop();
}

bool Client::shouldShowMinimap() const
{
	return !m_minimap_disabled_by_server;
}

void Client::showGameChat(const bool show)
{
	m_game_ui_flags->show_chat = show;
}

void Client::showGameHud(const bool show)
{
	m_game_ui_flags->show_hud = show;
}

void Client::showMinimap(const bool show)
{
	m_game_ui_flags->show_minimap = show;
}

void Client::showProfiler(const bool show)
{
	m_game_ui_flags->show_profiler_graph = show;
}

void Client::showGameFog(const bool show)
{
	m_game_ui_flags->force_fog_off = !show;
}

void Client::showGameDebug(const bool show)
{
	m_game_ui_flags->show_debug = show;
}

// IGameDef interface
// Under envlock
IItemDefManager* Client::getItemDefManager()
{
	return m_itemdef;
}
INodeDefManager* Client::getNodeDefManager()
{
	return m_nodedef;
}
ICraftDefManager* Client::getCraftDefManager()
{
	return NULL;
	//return m_craftdef;
}
ITextureSource* Client::getTextureSource()
{
	return m_tsrc;
}
IShaderSource* Client::getShaderSource()
{
	return m_shsrc;
}
scene::ISceneManager* Client::getSceneManager()
{
	return m_device->getSceneManager();
}
u16 Client::allocateUnknownNodeId(const std::string &name)
{
	errorstream << "Client::allocateUnknownNodeId(): "
			<< "Client cannot allocate node IDs" << std::endl;
	FATAL_ERROR("Client allocated unknown node");

	return CONTENT_IGNORE;
}
ISoundManager* Client::getSoundManager()
{
	return m_sound;
}
MtEventManager* Client::getEventManager()
{
	return m_event;
}

ParticleManager* Client::getParticleManager()
{
	return &m_particle_manager;
}

scene::IAnimatedMesh* Client::getMesh(const std::string &filename)
{
	StringMap::const_iterator it = m_mesh_data.find(filename);
	if (it == m_mesh_data.end()) {
		errorstream << "Client::getMesh(): Mesh not found: \"" << filename
			<< "\"" << std::endl;
		return NULL;
	}
	const std::string &data    = it->second;
	scene::ISceneManager *smgr = m_device->getSceneManager();

	// Create the mesh, remove it from cache and return it
	// This allows unique vertex colors and other properties for each instance
	Buffer<char> data_rw(data.c_str(), data.size()); // Const-incorrect Irrlicht
	io::IFileSystem *irrfs = m_device->getFileSystem();
	io::IReadFile *rfile   = irrfs->createMemoryReadFile(
			*data_rw, data_rw.getSize(), filename.c_str());
	FATAL_ERROR_IF(!rfile, "Could not create/open RAM file");

	scene::IAnimatedMesh *mesh = smgr->getMesh(rfile);
	rfile->drop();
	// NOTE: By playing with Irrlicht refcounts, maybe we could cache a bunch
	// of uniquely named instances and re-use them
	mesh->grab();
	smgr->getMeshCache()->removeMesh(mesh);
	return mesh;
}

bool Client::registerModStorage(ModMetadata *storage)
{
	if (m_mod_storages.find(storage->getModName()) != m_mod_storages.end()) {
		errorstream << "Unable to register same mod storage twice. Storage name: "
				<< storage->getModName() << std::endl;
		return false;
	}

	m_mod_storages[storage->getModName()] = storage;
	return true;
}

void Client::unregisterModStorage(const std::string &name)
{
	UNORDERED_MAP<std::string, ModMetadata *>::const_iterator it = m_mod_storages.find(name);
	if (it != m_mod_storages.end()) {
		// Save unconditionaly on unregistration
		it->second->save(getModStoragePath());
		m_mod_storages.erase(name);
	}
}

std::string Client::getModStoragePath() const
{
	return porting::path_user + DIR_DELIM + "client" + DIR_DELIM + "mod_storage";
}


code:
/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@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.
*/

#ifndef CLIENT_HEADER
#define CLIENT_HEADER

#include "network/connection.h"
#include "clientenvironment.h"
#include "irrlichttypes_extrabloated.h"
#include "threading/mutex.h"
#include <ostream>
#include <map>
#include <set>
#include <vector>
#include "clientobject.h"
#include "gamedef.h"
#include "inventorymanager.h"
#include "localplayer.h"
#include "hud.h"
#include "particles.h"
#include "mapnode.h"
#include "tileanimation.h"
#include "mesh_generator_thread.h"

#define CLIENT_CHAT_MESSAGE_LIMIT_PER_10S 10.0f

struct MeshMakeData;
class MapBlockMesh;
class IWritableTextureSource;
class IWritableShaderSource;
class IWritableItemDefManager;
class IWritableNodeDefManager;
//class IWritableCraftDefManager;
class ClientMediaDownloader;
struct MapDrawControl;
class MtEventManager;
struct PointedThing;
class MapDatabase;
class Minimap;
struct MinimapMapblock;
class Camera;
class NetworkPacket;

enum LocalClientState {
	LC_Created,
	LC_Init,
	LC_Ready
};

enum ClientEventType
{
	CE_NONE,
	CE_PLAYER_DAMAGE,
	CE_PLAYER_FORCE_MOVE,
	CE_DEATHSCREEN,
	CE_SHOW_FORMSPEC,
	CE_SHOW_LOCAL_FORMSPEC,
	CE_SPAWN_PARTICLE,
	CE_ADD_PARTICLESPAWNER,
	CE_DELETE_PARTICLESPAWNER,
	CE_HUDADD,
	CE_HUDRM,
	CE_HUDCHANGE,
	CE_SET_SKY,
	CE_OVERRIDE_DAY_NIGHT_RATIO,
	CE_CLOUD_PARAMS,
};

struct ClientEvent
{
	ClientEventType type;
	union{
		//struct{
		//} none;
		struct{
			u8 amount;
		} player_damage;
		struct{
			f32 pitch;
			f32 yaw;
		} player_force_move;
		struct{
			bool set_camera_point_target;
			f32 camera_point_target_x;
			f32 camera_point_target_y;
			f32 camera_point_target_z;
		} deathscreen;
		struct{
			std::string *formspec;
			std::string *formname;
		} show_formspec;
		//struct{
		//} textures_updated;
		struct{
			v3f *pos;
			v3f *vel;
			v3f *acc;
			f32 expirationtime;
			f32 size;
			bool collisiondetection;
			bool collision_removal;
			bool vertical;
			std::string *texture;
			struct TileAnimationParams animation;
			u8 glow;
		} spawn_particle;
		struct{
			u16 amount;
			f32 spawntime;
			v3f *minpos;
			v3f *maxpos;
			v3f *minvel;
			v3f *maxvel;
			v3f *minacc;
			v3f *maxacc;
			f32 minexptime;
			f32 maxexptime;
			f32 minsize;
			f32 maxsize;
			bool collisiondetection;
			bool collision_removal;
			u16 attached_id;
			bool vertical;
			std::string *texture;
			u32 id;
			struct TileAnimationParams animation;
			u8 glow;
		} add_particlespawner;
		struct{
			u32 id;
		} delete_particlespawner;
		struct{
			u32 id;
			u8 type;
			v2f *pos;
			std::string *name;
			v2f *scale;
			std::string *text;
			u32 number;
			u32 item;
			u32 dir;
			v2f *align;
			v2f *offset;
			v3f *world_pos;
			v2s32 * size;
		} hudadd;
		struct{
			u32 id;
		} hudrm;
		struct{
			u32 id;
			HudElementStat stat;
			v2f *v2fdata;
			std::string *sdata;
			u32 data;
			v3f *v3fdata;
			v2s32 * v2s32data;
		} hudchange;
		struct{
			video::SColor *bgcolor;
			std::string *type;
			std::vector<std::string> *params;
			bool clouds;
		} set_sky;
		struct{
			bool do_override;
			float ratio_f;
		} override_day_night_ratio;
		struct {
			f32 density;
			u32 color_bright;
			u32 color_ambient;
			f32 height;
			f32 thickness;
			f32 speed_x;
			f32 speed_y;
		} cloud_params;
	};
};

/*
	Packet counter
*/

class PacketCounter
{
public:
	PacketCounter()
	{
	}

	void add(u16 command)
	{
		std::map<u16, u16>::iterator n = m_packets.find(command);
		if(n == m_packets.end())
		{
			m_packets[command] = 1;
		}
		else
		{
			n->second++;
		}
	}

	void clear()
	{
		for(std::map<u16, u16>::iterator
				i = m_packets.begin();
				i != m_packets.end(); ++i)
		{
			i->second = 0;
		}
	}

	void print(std::ostream &o)
	{
		for(std::map<u16, u16>::iterator
				i = m_packets.begin();
				i != m_packets.end(); ++i)
		{
			o<<"cmd "<<i->first
					<<" count "<<i->second
					<<std::endl;
		}
	}

private:
	// command, count
	std::map<u16, u16> m_packets;
};

class ClientScripting;
struct GameUIFlags;

class Client : public con::PeerHandler, public InventoryManager, public IGameDef
{
public:
	/*
		NOTE: Nothing is thread-safe here.
	*/

	Client(
			IrrlichtDevice *device,
			const char *playername,
			const std::string &password,
			const std::string &address_name,
			MapDrawControl &control,
			IWritableTextureSource *tsrc,
			IWritableShaderSource *shsrc,
			IWritableItemDefManager *itemdef,
			IWritableNodeDefManager *nodedef,
			ISoundManager *sound,
			MtEventManager *event,
			bool ipv6,
			GameUIFlags *game_ui_flags
	);

	~Client();

	void initMods();

	/*
	 request all threads managed by client to be stopped
	 */
	void Stop();

	bool isShutdown();

	/*
		The name of the local player should already be set when
		calling this, as it is sent in the initialization.
	*/
	void connect(Address address, bool is_local_server);

	/*
		Stuff that references the environment is valid only as
		long as this is not called. (eg. Players)
		If this throws a PeerNotFoundException, the connection has
		timed out.
	*/
	void step(float dtime);

	/*
	 * Command Handlers
	 */

	void handleCommand(NetworkPacket* pkt);

	void handleCommand_Null(NetworkPacket* pkt) {};
	void handleCommand_Deprecated(NetworkPacket* pkt);
	void handleCommand_Hello(NetworkPacket* pkt);
	void handleCommand_AuthAccept(NetworkPacket* pkt);
	void handleCommand_AcceptSudoMode(NetworkPacket* pkt);
	void handleCommand_DenySudoMode(NetworkPacket* pkt);
	void handleCommand_InitLegacy(NetworkPacket* pkt);
	void handleCommand_AccessDenied(NetworkPacket* pkt);
	void handleCommand_RemoveNode(NetworkPacket* pkt);
	void handleCommand_AddNode(NetworkPacket* pkt);
	void handleCommand_BlockData(NetworkPacket* pkt);
	void handleCommand_Inventory(NetworkPacket* pkt);
	void handleCommand_TimeOfDay(NetworkPacket* pkt);
	void handleCommand_ChatMessage(NetworkPacket* pkt);
	void handleCommand_ActiveObjectRemoveAdd(NetworkPacket* pkt);
	void handleCommand_ActiveObjectMessages(NetworkPacket* pkt);
	void handleCommand_Movement(NetworkPacket* pkt);
	void handleCommand_HP(NetworkPacket* pkt);
	void handleCommand_Breath(NetworkPacket* pkt);
	void handleCommand_MovePlayer(NetworkPacket* pkt);
	void handleCommand_DeathScreen(NetworkPacket* pkt);
	void handleCommand_AnnounceMedia(NetworkPacket* pkt);
	void handleCommand_Media(NetworkPacket* pkt);
	void handleCommand_NodeDef(NetworkPacket* pkt);
	void handleCommand_ItemDef(NetworkPacket* pkt);
	void handleCommand_PlaySound(NetworkPacket* pkt);
	void handleCommand_StopSound(NetworkPacket* pkt);
	void handleCommand_FadeSound(NetworkPacket *pkt);
	void handleCommand_Privileges(NetworkPacket* pkt);
	void handleCommand_InventoryFormSpec(NetworkPacket* pkt);
	void handleCommand_DetachedInventory(NetworkPacket* pkt);
	void handleCommand_ShowFormSpec(NetworkPacket* pkt);
	void handleCommand_SpawnParticle(NetworkPacket* pkt);
	void handleCommand_AddParticleSpawner(NetworkPacket* pkt);
	void handleCommand_DeleteParticleSpawner(NetworkPacket* pkt);
	void handleCommand_HudAdd(NetworkPacket* pkt);
	void handleCommand_HudRemove(NetworkPacket* pkt);
	void handleCommand_HudChange(NetworkPacket* pkt);
	void handleCommand_HudSetFlags(NetworkPacket* pkt);
	void handleCommand_HudSetParam(NetworkPacket* pkt);
	void handleCommand_HudSetSky(NetworkPacket* pkt);
	void handleCommand_CloudParams(NetworkPacket* pkt);
	void handleCommand_OverrideDayNightRatio(NetworkPacket* pkt);
	void handleCommand_LocalPlayerAnimations(NetworkPacket* pkt);
	void handleCommand_EyeOffset(NetworkPacket* pkt);
	void handleCommand_SrpBytesSandB(NetworkPacket* pkt);

	void ProcessData(NetworkPacket *pkt);

	void Send(NetworkPacket* pkt);

	void interact(u8 action, const PointedThing& pointed);

	void sendNodemetaFields(v3s16 p, const std::string &formname,
		const StringMap &fields);
	void sendInventoryFields(const std::string &formname,
		const StringMap &fields);
	void sendInventoryAction(InventoryAction *a);
	void sendChatMessage(const std::wstring &message);
	void clearOutChatQueue();
	void sendChangePassword(const std::string &oldpassword,
		const std::string &newpassword);
	void sendDamage(u8 damage);
	void sendBreath(u16 breath);
	void sendRespawn();
	void sendReady();

	ClientEnvironment& getEnv() { return m_env; }
	ITextureSource *tsrc() { return getTextureSource(); }
	ISoundManager *sound() { return getSoundManager(); }
	static const std::string &getBuiltinLuaPath();
	static const std::string &getClientModsLuaPath();

	virtual const std::vector<ModSpec> &getMods() const;
	virtual const ModSpec* getModSpec(const std::string &modname) const;

	// Causes urgent mesh updates (unlike Map::add/removeNodeWithEvent)
	void removeNode(v3s16 p);
	MapNode getNode(v3s16 p, bool *is_valid_position);
	void addNode(v3s16 p, MapNode n, bool remove_metadata = true);

	void setPlayerControl(PlayerControl &control);

	void selectPlayerItem(u16 item);
	u16 getPlayerItem() const
	{ return m_playeritem; }

	// Returns true if the inventory of the local player has been
	// updated from the server. If it is true, it is set to false.
	bool getLocalInventoryUpdated();
	// Copies the inventory of the local player to parameter
	void getLocalInventory(Inventory &dst);

	/* InventoryManager interface */
	Inventory* getInventory(const InventoryLocation &loc);
	void inventoryAction(InventoryAction *a);

	const std::list<std::string> &getConnectedPlayerNames()
	{
		return m_env.getPlayerNames();
	}

	float getAnimationTime();

	int getCrackLevel();
	v3s16 getCrackPos();
	void setCrack(int level, v3s16 pos);

	u16 getHP();

	bool checkPrivilege(const std::string &priv) const
	{ return (m_privileges.count(priv) != 0); }

	bool getChatMessage(std::wstring &message);
	void typeChatMessage(const std::wstring& message);

	u64 getMapSeed(){ return m_map_seed; }

	void addUpdateMeshTask(v3s16 blockpos, bool ack_to_server=false, bool urgent=false);
	// Including blocks at appropriate edges
	void addUpdateMeshTaskWithEdge(v3s16 blockpos, bool ack_to_server=false, bool urgent=false);
	void addUpdateMeshTaskForNode(v3s16 nodepos, bool ack_to_server=false, bool urgent=false);

	void updateCameraOffset(v3s16 camera_offset)
	{ m_mesh_update_thread.m_camera_offset = camera_offset; }

	bool hasClientEvents() const { return !m_client_event_queue.empty(); }
	// Get event from queue. If queue is empty, it triggers an assertion failure.
	ClientEvent getClientEvent();

	bool accessDenied() const { return m_access_denied; }

	bool reconnectRequested() const { return m_access_denied_reconnect; }

	void setFatalError(const std::string &reason)
	{
		m_access_denied = true;
		m_access_denied_reason = reason;
	}

	// Renaming accessDeniedReason to better name could be good as it's used to
	// disconnect client when CSM failed.
	const std::string &accessDeniedReason() const { return m_access_denied_reason; }

	bool itemdefReceived()
	{ return m_itemdef_received; }
	bool nodedefReceived()
	{ return m_nodedef_received; }
	bool mediaReceived()
	{ return m_media_downloader == NULL; }

	u8 getProtoVersion()
	{ return m_proto_ver; }

	bool connectedToServer()
	{ return m_con.Connected(); }

	float mediaReceiveProgress();

	void afterContentReceived(IrrlichtDevice *device);

	float getRTT();
	float getCurRate();

	Minimap* getMinimap() { return m_minimap; }
	void setCamera(Camera* camera) { m_camera = camera; }

	Camera* getCamera () { return m_camera; }

	bool shouldShowMinimap() const;

	// IGameDef interface
	virtual IItemDefManager* getItemDefManager();
	virtual INodeDefManager* getNodeDefManager();
	virtual ICraftDefManager* getCraftDefManager();
	ITextureSource* getTextureSource();
	virtual IShaderSource* getShaderSource();
	IShaderSource *shsrc() { return getShaderSource(); }
	scene::ISceneManager* getSceneManager();
	virtual u16 allocateUnknownNodeId(const std::string &name);
	virtual ISoundManager* getSoundManager();
	virtual MtEventManager* getEventManager();
	virtual ParticleManager* getParticleManager();
	bool checkLocalPrivilege(const std::string &priv)
	{ return checkPrivilege(priv); }
	virtual scene::IAnimatedMesh* getMesh(const std::string &filename);

	virtual std::string getModStoragePath() const;
	virtual bool registerModStorage(ModMetadata *meta);
	virtual void unregisterModStorage(const std::string &name);

	// The following set of functions is used by ClientMediaDownloader
	// Insert a media file appropriately into the appropriate manager
	bool loadMedia(const std::string &data, const std::string &filename);
	// Send a request for conventional media transfer
	void request_media(const std::vector<std::string> &file_requests);

	LocalClientState getState() { return m_state; }

	void makeScreenshot(IrrlichtDevice *device);

	inline void pushToChatQueue(const std::wstring &input)
	{
		m_chat_queue.push(input);
	}

	ClientScripting *getScript() { return m_script; }
	const bool moddingEnabled() const { return m_modding_enabled; }

	inline void pushToEventQueue(const ClientEvent &event)
	{
		m_client_event_queue.push(event);
	}

	void showGameChat(const bool show = true);
	void showGameHud(const bool show = true);
	void showMinimap(const bool show = true);
	void showProfiler(const bool show = true);
	void showGameFog(const bool show = true);
	void showGameDebug(const bool show = true);

	IrrlichtDevice *getDevice() const { return m_device; }

	const Address getServerAddress()
	{
		return m_con.GetPeerAddress(PEER_ID_SERVER);
	}

	const std::string &getAddressName() const
	{
		return m_address_name;
	}

private:

	// Virtual methods from con::PeerHandler
	void peerAdded(con::Peer *peer);
	void deletingPeer(con::Peer *peer, bool timeout);

	void initLocalMapSaving(const Address &address,
			const std::string &hostname,
			bool is_local_server);

	void ReceiveAll();
	void Receive();

	void sendPlayerPos();
	// Send the item number 'item' as player item to the server
	void sendPlayerItem(u16 item);

	void deleteAuthData();
	// helper method shared with clientpackethandler
	static AuthMechanism choseAuthMech(const u32 mechs);

	void sendLegacyInit(const char* playerName, const char* playerPassword);
	void sendInit(const std::string &playerName);
	void startAuth(AuthMechanism chosen_auth_mechanism);
	void sendDeletedBlocks(std::vector<v3s16> &blocks);
	void sendGotBlocks(v3s16 block);
	void sendRemovedSounds(std::vector<s32> &soundList);

	// Helper function
	inline std::string getPlayerName()
	{ return m_env.getLocalPlayer()->getName(); }

	bool canSendChatMessage() const;

	float m_packetcounter_timer;
	float m_connection_reinit_timer;
	float m_avg_rtt_timer;
	float m_playerpos_send_timer;
	float m_ignore_damage_timer; // Used after server moves player
	IntervalLimiter m_map_timer_and_unload_interval;

	IWritableTextureSource *m_tsrc;
	IWritableShaderSource *m_shsrc;
	IWritableItemDefManager *m_itemdef;
	IWritableNodeDefManager *m_nodedef;
	ISoundManager *m_sound;
	MtEventManager *m_event;

	MeshUpdateThread m_mesh_update_thread;
	ClientEnvironment m_env;
	ParticleManager m_particle_manager;
	con::Connection m_con;
	std::string m_address_name;
	IrrlichtDevice *m_device;
	Camera *m_camera;
	Minimap *m_minimap;
	bool m_minimap_disabled_by_server;
	// Server serialization version
	u8 m_server_ser_ver;

	// Used version of the protocol with server
	// Values smaller than 25 only mean they are smaller than 25,
	// and aren't accurate. We simply just don't know, because
	// the server didn't send the version back then.
	// If 0, server init hasn't been received yet.
	u8 m_proto_ver;

	u16 m_playeritem;
	bool m_inventory_updated;
	Inventory *m_inventory_from_server;
	float m_inventory_from_server_age;
	PacketCounter m_packetcounter;
	// Block mesh animation parameters
	float m_animation_time;
	int m_crack_level;
	v3s16 m_crack_pos;
	// 0 <= m_daynight_i < DAYNIGHT_CACHE_COUNT
	//s32 m_daynight_i;
	//u32 m_daynight_ratio;
	std::queue<std::wstring> m_chat_queue;
	std::queue<std::wstring> m_out_chat_queue;
	u32 m_last_chat_message_sent;
	float m_chat_message_allowance;

	// The authentication methods we can use to enter sudo mode (=change password)
	u32 m_sudo_auth_methods;

	// The seed returned by the server in TOCLIENT_INIT is stored here
	u64 m_map_seed;

	// Auth data
	std::string m_playername;
	std::string m_password;
	// If set, this will be sent (and cleared) upon a TOCLIENT_ACCEPT_SUDO_MODE
	std::string m_new_password;
	// Usable by auth mechanisms.
	AuthMechanism m_chosen_auth_mech;
	void * m_auth_data;

	bool m_access_denied;
	bool m_access_denied_reconnect;
	std::string m_access_denied_reason;
	std::queue<ClientEvent> m_client_event_queue;
	bool m_itemdef_received;
	bool m_nodedef_received;
	ClientMediaDownloader *m_media_downloader;

	// time_of_day speed approximation for old protocol
	bool m_time_of_day_set;
	float m_last_time_of_day_f;
	float m_time_of_day_update_timer;

	// An interval for generally sending object positions and stuff
	float m_recommended_send_interval;

	// Sounds
	float m_removed_sounds_check_timer;
	// Mapping from server sound ids to our sound ids
	UNORDERED_MAP<s32, int> m_sounds_server_to_client;
	// And the other way!
	UNORDERED_MAP<int, s32> m_sounds_client_to_server;
	// And relations to objects
	UNORDERED_MAP<int, u16> m_sounds_to_objects;

	// Privileges
	UNORDERED_SET<std::string> m_privileges;

	// Detached inventories
	// key = name
	UNORDERED_MAP<std::string, Inventory*> m_detached_inventories;

	// Storage for mesh data for creating multiple instances of the same mesh
	StringMap m_mesh_data;

	// own state
	LocalClientState m_state;

	// Used for saving server map to disk client-side
	MapDatabase *m_localdb;
	IntervalLimiter m_localdb_save_interval;
	u16 m_cache_save_interval;

	ClientScripting *m_script;
	bool m_modding_enabled;
	UNORDERED_MAP<std::string, ModMetadata *> m_mod_storages;
	float m_mod_storage_save_timer;
	GameUIFlags *m_game_ui_flags;

	bool m_shutdown;
	DISABLE_CLASS_COPY(Client);
};

#endif // !CLIENT_HEADER


code:
set(client_SRCS
	${CMAKE_CURRENT_SOURCE_DIR}/clientlauncher.cpp
	${CMAKE_CURRENT_SOURCE_DIR}/inputhandler.cpp
	${CMAKE_CURRENT_SOURCE_DIR}/tile.cpp
	${CMAKE_CURRENT_SOURCE_DIR}/joystick_controller.cpp
	PARENT_SCOPE
)