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/*
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* Copyright (C) 2015 Christian Ehringfeld <c.ehringfeld@t-online.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ENTITYMANAGER_H
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#define ENTITYMANAGER_H
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#include <QtSql/QSqlDatabase>
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#include <QtSql/QSqlRecord>
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#include <QtSql/QSqlField>
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#include <QString>
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#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>
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#include <QMetaType>
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#include "entity.h"
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#include "database.h"
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#include "entityinstancefactory.h"
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#include "cache.h"
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namespace CuteEntityManager {
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class EntityManager {
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signals:
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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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Cache cache;
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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);
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void resolveRelations(const QSharedPointer<Entity> &entity,
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const QHash<QString, QVariant> &map, const bool refresh = false);
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QHash<QString, QVariant> findByPk(qint64 id, QString tblname);
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QSharedPointer<Entity> convert(const QHash<QString, QVariant> &map,
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const char *classname, const bool refresh = false);
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QList<QSharedPointer<Entity>> convert(QList<QHash<QString, QVariant> > maps,
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const char *classname, const bool refresh = false);
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void manyToOne(const QSharedPointer<Entity> &entity, const QVariant &id,
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const QMetaProperty &property, const bool refresh = false);
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void oneToMany(const QSharedPointer<Entity> &entity, const Relation &r,
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const QMetaProperty &property, const bool refresh = false);
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void manyToMany(const QSharedPointer<Entity> &entity, const Relation &r,
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const QMetaProperty &property, const bool refresh = false);
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void oneToOne(const QSharedPointer<Entity> &entity, const Relation &r,
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const QMetaProperty &property, const bool refresh = false,
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const QVariant &id = "");
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bool canPersistRelation(const Relation &relation, const RelationType &r,
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const QVariant &var) const;
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void persistManyToMany(const QSharedPointer<Entity> &entity, const Relation &r,
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const QVariant &property);
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QList<QHash<QString, QVariant> > findAllByAttributes(const
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QSharedPointer<Entity> &entity,
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bool ignoreID = false);
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QList<QHash<QString, QVariant> > findAllByAttributes(const
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QHash<QString, QVariant> &m,
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const QString &tblname,
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bool ignoreID = false);
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QSharedPointer<Entity> findById(const qint64 &id, Entity *&e,
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const bool refresh = false);
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void addEntityToListProperty(const QSharedPointer<Entity> &entity,
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QSharedPointer<Entity> add, const QMetaProperty &property);
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void setListProperty(const QSharedPointer<Entity> &entity,
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QList<QSharedPointer<Entity>> &list,
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const QMetaProperty &property) const;
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void setProperty(const QSharedPointer<Entity> &entiy,
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QSharedPointer<Entity> value,
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const QMetaProperty &property) const;
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void saveRelations(const QSharedPointer<Entity> &entity);
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QList<QSharedPointer<Entity>> saveRelationEntities(const
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QList<QSharedPointer<Entity>> &list, const Relation &r);
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void persistMappedByRelation(const QList<QSharedPointer<Entity>> &list,
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QSqlQuery &q, const QSharedPointer<Entity> &entity, const Relation &r,
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const QString &tblName);
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bool shouldBeSaved(QSharedPointer<Entity> &entity , const Relation &r);
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void removeRelations(const QSharedPointer<Entity> &entity);
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void removeEntityList(QVariant &var);
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void removeManyToManyEntityList(const QSharedPointer<Entity> &e, const Relation &r, QVariant &var);
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void removeEntity(QVariant &var);
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void setNullOneToManyRelation(QVariant &var, const Relation &r);
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void setNullEntityPropertyRelation(QVariant &var, const Relation &r);
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public:
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EntityManager(QSqlDatabase database);
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EntityManager(const QString &databaseType, QString databasename = "" ,
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QString hostname = "",
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QString username = "",
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QString password = "", QString port = "");
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~EntityManager();
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static QStringList getConnectionNames();
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/**
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* @brief startup
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* @param version must be unique
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* @param toInitialize list of entity classnames which database tables should be created
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* @return
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*/
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bool startup(QString version, QStringList toInitialize);
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bool executeQuery(const QString &query);
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static void removeConnectionName(const QString &name);
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QSharedPointer<Entity> findById(const qint64 &id, const QString &classname);
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QList<QSharedPointer<Entity>> findEntityByAttributes(const
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QSharedPointer<Entity> &entity,
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bool ignoreID = false);
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bool create(QList<QSharedPointer<Entity>> entities,
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const bool persistRelations = true);
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bool create(QSharedPointer<Entity> &entity, const bool persistRelations = true);
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bool save(QSharedPointer<Entity> &entity, const bool persistRelations = true);
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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);
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qint8 count(const QString &tableName);
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QSharedPointer<Database> getDb() const;
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void setDb(const QSharedPointer<Database> &value);
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QSharedPointer<Schema> getSchema() const;
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void refresh(QSharedPointer<Entity> &entity);
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void setSchema(const QSharedPointer<Schema> &value);
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/**
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*@TODO create indexes
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*@TODO use conditions
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*/
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template<class T> qint8 count(QHash<QString, QString> condition =
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QHash<QString, QString>()) {
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Entity *e = EntityInstanceFactory::createInstance<T>();
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qint8 rc = 0;
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if (e) {
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rc = this->count(e->getTablename());
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delete e;
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}
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return rc;
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}
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template<class T> QList<QSharedPointer<Entity>> findAll() {
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Entity *e = EntityInstanceFactory::createInstance<T>();
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if (e) {
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auto maps = this->findAll(e->getTablename());
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const char *className = e->getClassname();
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delete e;
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return this->convert(maps, className);
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}
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return QList<QSharedPointer<Entity>>();
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}
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template<class T> QSharedPointer<Entity> findById(const qint64 &id) {
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Entity *e = EntityInstanceFactory::createInstance<T>();
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return this->findById(id, e);
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}
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template<class T> QSharedPointer<Entity> findEntityByAttributes(
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const QHash<QString, QString>
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&attributes) {
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auto list = this->findAllEntitiesByAttributes<T>(attributes, 1, 0);
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if (list.isEmpty()) {
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return QSharedPointer<Entity>();
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}
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return list.at(0);
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}
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template<class T> QList<QSharedPointer<Entity>> findAllEntitiesByAttributes(
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const QHash<QString, QString> &attributes =
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QHash<QString, QString>(), quint32 limit = 0, quint32 offset = 0) {
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auto list = this->findAllEntitiesByAttributes<T>(attributes);
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return list;
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}
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template<class T> QList<QSharedPointer<Entity>> findEntitiesBySql(
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const QString &sql) {
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Entity *e = EntityInstanceFactory::createInstance<T>();
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if (e) {
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QSqlQuery q = this->schema.data()->getQueryBuilder().data()->getQuery();
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q = this->db.data()->select(sql);
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auto result = this->convertQueryResult(q);
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auto ret = this->convert(result, e->getClassname());
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delete e;
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return ret;
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}
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return QList<QSharedPointer<Entity>>();
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}
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template<class T> bool remove(const QList<qint64> &ids) {
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bool ok = true;
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foreach (qint64 var, ids) {
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if (!this->remove<T>(var)) {
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ok = false;
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break;
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}
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}
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return ok;
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}
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template<class T> bool remove(qint64 id) {
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Entity *e = EntityInstanceFactory::createInstance<T>();
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if (e) {
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QSharedPointer<Entity> ptr = QSharedPointer<Entity>(e);
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e->setId(id);
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return this->remove(ptr);
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}
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return false;
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}
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};
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}
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#endif // ENTITYMANAGER_H
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