source: confclerk_git/src/sql/sqlengine.h @ 0c71a07

Last change on this file since 0c71a07 was 0c71a07, checked in by Philipp Spitzer <philipp@…>, 5 years ago

Implement rollbackTransaction().

  • Property mode set to 100644
File size: 3.3 KB
Line 
1/*
2 * Copyright (C) 2010 Ixonos Plc.
3 * Copyright (C) 2011-2017 Philipp Spitzer, gregor herrmann, Stefan Stahl
4 *
5 * This file is part of ConfClerk.
6 *
7 * ConfClerk is free software: you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation, either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 * ConfClerk is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * ConfClerk.  If not, see <http://www.gnu.org/licenses/>.
19 */
20#ifndef SQLENGINE_H
21#define SQLENGINE_H
22
23#include <QObject>
24#include <QHash>
25#include <QSqlDatabase>
26
27
28class SqlEngine : public QObject {
29    Q_OBJECT
30    public:
31        const QString DATE_FORMAT = "yyyy-MM-dd";
32        const QString TIME_FORMAT = "hh:mm";
33
34        QString dbFilename; ///< database filename including path
35        QSqlDatabase db; ///< this may be private one day...
36
37        SqlEngine(QObject *aParent = NULL);
38        ~SqlEngine();
39
40        // Open/Close
41        void open(); ///< emits a database error if failed.
42        bool isOpen() const {return db.isOpen();}
43        void close() {db.close();}
44
45        // Schema version
46        /// returns the "user_version" of the database schema
47        /// we return -1 for an empty database
48        /// the database has to be open
49        /// returns -2 if an error occurs and emits the error message
50        int dbSchemaVersion();
51        /// called by createOrUpdateDbSchema. Do not use directly. true for success.
52        bool updateDbSchemaVersion000To001();
53        /// called by createOrUpdateDbSchma. Do not use directly. true for success.
54        bool createCurrentDbSchema();
55        /// creates the current database schema if an empty database is found,
56        /// otherwise updates the schema if an old one is found. true for success.
57        bool createOrUpdateDbSchema();
58        /// Applies an SQL file
59        bool applySqlFile(const QString sqlFile);
60
61        // if a conferneceId != 0 is given, the confernce is updated instead of inserted.
62        void addConferenceToDB(QHash<QString,QString> &aConference, int conferenceId);
63        void addEventToDB(QHash<QString,QString> &aEvent);
64        void addPersonToDB(QHash<QString,QString> &aPerson);
65        void addLinkToDB(QHash<QString,QString> &aLink);
66        void addRoomToDB(QHash<QString,QString> &aRoom);
67        bool deleteConference(int id);
68
69        bool beginTransaction();
70        bool commitTransaction();
71        bool rollbackTransaction();
72
73        /// search Events for .... returns true if success
74        bool searchEvent(int conferenceId, const QHash<QString,QString> &columns, const QString &keyword);
75    private:
76        static QString login(const QString &aDatabaseType, const QString &aDatabaseName);
77        /// emits a possible error message as signal. Does nothing if there was not last error
78        void emitSqlQueryError(const QSqlQuery& query);
79
80    signals:
81        /// emitted when a database errors occur
82        void dbError(const QString& message);
83};
84
85#endif /* SQLENGINE_H */
86
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