src/clientmedia.h


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/*
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.
*/

#pragma once

#include "irrlichttypes.h"
#include "filecache.h"
#include <ostream>
#include <map>
#include <set>
#include <vector>
#include <unordered_map>

class Client;
struct HTTPFetchResult;

#define MTHASHSET_FILE_SIGNATURE 0x4d544853 // 'MTHS'
#define MTHASHSET_FILE_NAME "index.mth"

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

	float getProgress() const {
		if (m_uncached_count >= 1)
			return 1.0f * m_uncached_received_count /
				m_uncached_count;

		return 0.0f;
	}

	bool isStarted() const {
		return m_initial_step_done;
	}

	// If this returns true, the downloader is done and can be deleted
	bool isDone() const {
		return m_initial_step_done &&
			m_uncached_received_count == m_uncached_count;
	}

	// Add a file to the list of required file (but don't fetch it yet)
	void addFile(const std::string &name, const std::string &sha1);

	// Add a remote server to the list; ignored if not built with cURL
	void addRemoteServer(const std::string &baseurl);

	// Steps the media downloader:
	// - May load media into client by calling client->loadMedia()
	// - May check media cache for files
	// - May add files to media cache
	// - May start remote transfers by calling httpfetch_async
	// - May check for completion of current remote transfers
	// - May start conventional transfers by calling client->request_media()
	// - May inform server that all media has been loaded
	//   by calling client->received_media()