squawk/core/storage/archive.h

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/*
* Squawk messenger.
* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
*
* This program 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.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef CORE_ARCHIVE_H
#define CORE_ARCHIVE_H
#include <QObject>
#include <QCryptographicHash>
#include <QMimeDatabase>
#include <QMimeType>
#include "shared/message.h"
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#include "shared/exception.h"
#include <lmdb.h>
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#include <list>
namespace Core {
class Archive : public QObject
{
Q_OBJECT
public:
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class AvatarInfo;
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Archive(const QString& jid, QObject* parent = 0);
~Archive();
void open(const QString& account);
void close();
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bool addElement(const Shared::Message& message);
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unsigned int addElements(const std::list<Shared::Message>& messages);
Shared::Message getElement(const QString& id) const;
bool hasElement(const QString& id) const;
void changeMessage(const QString& id, const QMap<QString, QVariant>& data);
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Shared::Message oldest();
QString oldestId();
Shared::Message newest();
QString newestId();
void clear();
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long unsigned int size() const;
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std::list<Shared::Message> getBefore(int count, const QString& id);
bool isFromTheBeginning();
void setFromTheBeginning(bool is);
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bool setAvatar(const QByteArray& data, AvatarInfo& info, bool generated = false, const QString& resource = "");
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AvatarInfo getAvatarInfo(const QString& resource = "") const;
bool readAvatarInfo(AvatarInfo& target, const QString& resource = "") const;
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void readAllResourcesAvatars(std::map<QString, AvatarInfo>& data) const;
QString idByStanzaId(const QString& stanzaId) const;
QString stanzaIdById(const QString& id) const;
public:
const QString jid;
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public:
class Directory:
public Utils::Exception
{
public:
Directory(const std::string& p_path):Exception(), path(p_path){}
std::string getMessage() const{return "Can't create directory for database at " + path;}
private:
std::string path;
};
class Closed:
public Utils::Exception
{
public:
Closed(const std::string& op, const std::string& acc):Exception(), operation(op), account(acc){}
std::string getMessage() const{return "An attempt to perform operation " + operation + " on closed archive for " + account;}
private:
std::string operation;
std::string account;
};
class NotFound:
public Utils::Exception
{
public:
NotFound(const std::string& k, const std::string& acc):Exception(), key(k), account(acc){}
std::string getMessage() const{return "Element for id " + key + " wasn't found in database " + account;}
private:
std::string key;
std::string account;
};
class Empty:
public Utils::Exception
{
public:
Empty(const std::string& acc):Exception(), account(acc){}
std::string getMessage() const{return "An attempt to read ordered elements from database " + account + " but it's empty";}
private:
std::string account;
};
class Exist:
public Utils::Exception
{
public:
Exist(const std::string& acc, const std::string& p_key):Exception(), account(acc), key(p_key){}
std::string getMessage() const{return "An attempt to insert element " + key + " to database " + account + " but it already has an element with given id";}
private:
std::string account;
std::string key;
};
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class NoAvatar:
public Utils::Exception
{
public:
NoAvatar(const std::string& el, const std::string& res):Exception(), element(el), resource(res){
if (resource.size() == 0) {
resource = "for himself";
}
}
std::string getMessage() const{return "Element " + element + " has no avatar for " + resource ;}
private:
std::string element;
std::string resource;
};
class Unknown:
public Utils::Exception
{
public:
Unknown(const std::string& acc, const std::string& message):Exception(), account(acc), msg(message){}
std::string getMessage() const{return "Unknown error on database " + account + ": " + msg;}
private:
std::string account;
std::string msg;
};
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class AvatarInfo {
public:
AvatarInfo();
AvatarInfo(const QString& type, const QByteArray& hash, bool autogenerated);
void deserialize(char* pointer, uint32_t size);
void serialize(QByteArray* ba) const;
QString type;
QByteArray hash;
bool autogenerated;
};
private:
bool opened;
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bool fromTheBeginning;
MDB_env* environment;
MDB_dbi main; //id to message
MDB_dbi order; //time to id
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MDB_dbi stats;
MDB_dbi avatars;
MDB_dbi sid; //stanzaId to id
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bool getStatBoolValue(const std::string& id, MDB_txn* txn);
std::string getStatStringValue(const std::string& id, MDB_txn* txn);
bool setStatValue(const std::string& id, bool value, MDB_txn* txn);
bool setStatValue(const std::string& id, const std::string& value, MDB_txn* txn);
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bool readAvatarInfo(AvatarInfo& target, const std::string& res, MDB_txn* txn) const;
void printOrder();
void printKeys();
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bool dropAvatar(const std::string& resource);
Shared::Message getMessage(const std::string& id, MDB_txn* txn) const;
Shared::Message getStoredMessage(MDB_txn *txn, MDB_cursor* cursor, MDB_cursor_op op, MDB_val* key, MDB_val* value, int& rc);
Shared::Message edge(bool end);
};
}
#endif // CORE_ARCHIVE_H