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/*
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* Copyright (C) 2015 Christian Ehringfeld <c.ehringfeld@t-online.de>
*
* 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.
*
* 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 Lesser General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
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#ifndef ENTITYMANAGER_H
#define ENTITYMANAGER_H
#include <QtSql/QSqlDatabase>
#include <QtSql/QSqlRecord>
#include <QtSql/QSqlField>
#include <QString>
#include <QStringList>
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#include <QSharedPointer>
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#include <QDebug>
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#include "schema.h"
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#include <QtSql/QSqlError>
#include "entity.h"
#include "database.h"

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namespace CuteEntityManager {
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class EntityManager {
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signals:
void actionFinished(qint64 id);

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private:
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static QStringList connectionNames;
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QSharedPointer<Schema> schema;
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static void setConnectionNames(QStringList list);
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QSharedPointer<Database> db;
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QString createConnection();
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QString createTableQuery(const QSharedPointer<Entity> &entity);
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QList<QHash<QString, QVariant> > convertQueryResult(QSqlQuery &q);
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bool checkTable(const QSharedPointer<Entity> &entity);
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protected:
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void init();
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QList<QHash<QString, QVariant> > findAll(QString tblname);
QHash<QString, QVariant> find(QSharedPointer<Entity> entity);
QHash<QString, QVariant> find(qint64 id, QString tblname);
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QSharedPointer<Entity> convert(const QHash<QString, QVariant> &map, const char *classname);
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QList<QSharedPointer<Entity>> convert(QList<QHash<QString, QVariant> > maps, const char *classname);
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QList<QHash<QString, QVariant> > findAllByAttributes(const QSharedPointer<Entity> &entity, bool ignoreID = false);
QList<QHash<QString, QVariant> > findAllByAttributes(const QHash<QString, QVariant> &m, const QString &tblname,
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bool ignoreID = false);
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public:
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EntityManager(QSqlDatabase database);
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EntityManager(const QString &databaseType, QString databasename = "" , QString hostname = "", QString username = "",
QString password = "", QString port = "");
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~EntityManager();
static QStringList getConnectionNames();
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/**
* @brief startup
* @param version must be unique
* @param toInitialize list of entity classnames which database tables should be created
* @return
*/
bool startup(QString version, QStringList toInitialize);
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static void removeConnectionName(const QString &name);
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QList<QSharedPointer<Entity>> findAllEntities(QSharedPointer<Entity> entity);
QSharedPointer<Entity> findEntity(QSharedPointer<Entity> entity);
QList<QSharedPointer<Entity>> findEntityByAttributes(const QSharedPointer<Entity> &entity, bool ignoreID = false);


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bool create(QSharedPointer<Entity> &entity);
bool save(QSharedPointer<Entity> &entity);
qint64 findId(QSharedPointer<Entity> &entity);
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bool merge(QSharedPointer<Entity> &entity, bool withRelations = true);
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bool remove(QSharedPointer<Entity> &entity);
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bool removeAll(QString tblname);
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bool createTable(const QSharedPointer<Entity> &entity);
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qint8 count(const QSharedPointer<Entity> &entity, bool ignoreID = true);
qint8 count(const QString &tableName);
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QSharedPointer<Database> getDb() const;
void setDb(const QSharedPointer<Database> &value);
QSharedPointer<Schema> getSchema() const;
void setSchema(const QSharedPointer<Schema> &value);
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};
}
#endif // ENTITYMANAGER_H