/*

This file is part of cpp-ethereum.

cpp-ethereum is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.

cpp-ethereum 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 General Public License for more details.

You should have received a copy of the GNU General Public License

along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.

*/

/** @file DappLoader.h

* @author Arkadiy Paronyan <arkadiy@ethdev.org>

* @date 2015

*/

#pragma once

#include <map>

#include <string>

#include <vector>

#include <QObject>

#include <QString>

#include <QUrl>

#include <QNetworkAccessManager>

#include <libdevcore/FixedHash.h>

#include <libdevcrypto/Common.h>

namespace dev

{

class WebThreeDirect;

class RLP;

}

struct ManifestEntry

{

std::string path;

dev::h256 hash;

std::string contentType;

unsigned httpStatus;

};

struct Manifest

{

std::vector<ManifestEntry> entries;

};

struct Dapp

{

Manifest manifest;

std::map<dev::h256, dev::bytes> content;

};

struct DappLocation

{

QString canonDomain;

QString path;

QString contentUri;

dev::h256 contentHash;

};

///Downloads, unpacks and prepares DApps for hosting

class DappLoader: public QObject

{

Q_OBJECT

public:

DappLoader(QObject* _parent, dev::WebThreeDirect* _web3, dev::Address _nameReg);

///Load a new DApp. Resolves a name with a name reg contract. Asynchronous. dappReady is emitted once everything is read, dappError othervise

///@param _uri Eth name path

void loadDapp(QString const& _uri);

///Load a regular html page

///@param _uri Page Uri

void loadPage(QString const& _uri);

signals:

void dappReady(Dapp& _dapp);

void pageReady(QByteArray const& _content, QString const& _mimeType, QUrl const& _uri);

void dappError();

private slots:

void downloadComplete(QNetworkReply* _reply);

private:

dev::WebThreeDirect* web3() const { return m_web3; }

DappLocation resolveAppUri(QString const& _uri);

void loadDapp(dev::RLP const& _rlp);

Manifest loadManifest(std::string const& _manifest);

QByteArray const& web3Content();

dev::WebThreeDirect* m_web3;

QNetworkAccessManager m_net;

std::map<QUrl, dev::h256> m_uriHashes;

std::set<QUrl> m_pageUrls;

QByteArray m_web3Js;

dev::Address m_nameReg;

};