File indexing completed on 2024-04-28 04:50:50

 /*
  * sqlhelper.cpp
  *
  * Copyright (C) 2009-2011 Christoph Pfister <christophpfister@gmail.com>
  *
  * 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 2 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, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #include "log.h"
 
 #include <KMessageBox>
 #include <QSqlError>
 #include <QStandardPaths>
 
 #include "sqlhelper.h"
 #include "sqlinterface.h"
 
 SqlHelper::SqlHelper()
 {
     database = QSqlDatabase::addDatabase(QLatin1String("QSQLITE"), QLatin1String("kaffeine"));
     database.setDatabaseName(QStandardPaths::writableLocation(QStandardPaths::DataLocation) + QLatin1String("/sqlite.db"));
 
     timer.setInterval(5000);
     connect(&timer, SIGNAL(timeout()), this, SLOT(collectSubmissions()));
 }
 
 SqlHelper::~SqlHelper()
 {
 }
 
 bool SqlHelper::createInstance()
 {
     Q_ASSERT(instance == NULL);
 
     if (!QSqlDatabase::isDriverAvailable(QLatin1String("QSQLITE"))) {
         KMessageBox::error(NULL, i18nc("message box", "Please install the Qt SQLite plugin."));
         return false;
     }
 
     instance = new SqlHelper();
 
     if (!instance->database.open()) {
         QString details = instance->database.lastError().databaseText();
 
         if (!details.isEmpty() && !details.endsWith(QLatin1Char('\n'))) {
             details.append(QLatin1Char('\n'));
         }
 
         details.append(instance->database.lastError().driverText());
         KMessageBox::detailedError(NULL,
             i18nc("message box", "Cannot open the SQLite database."), details);
         delete instance;
         instance = NULL;
         return false;
     }
 
     return true;
 }
 
 SqlHelper *SqlHelper::getInstance()
 {
     return instance;
 }
 
 QSqlQuery SqlHelper::prepare(const QString &statement)
 {
     QSqlQuery query(database);
     query.setForwardOnly(true);
 
     if (!query.prepare(statement)) {
         qCWarning(logSql, "Error while preparing statement '%s'", qPrintable(query.lastError().text()));
     }
 
     return query;
 }
 
 QSqlQuery SqlHelper::exec(const QString &statement)
 {
     QSqlQuery query(database);
     query.setForwardOnly(true);
 
     if (!query.exec(statement)) {
         qCWarning(logSql, "Error while executing statement '%s'", qPrintable(query.lastError().text()));
     }
 
     return query;
 }
 
 void SqlHelper::exec(QSqlQuery &query)
 {
     if (!query.exec()) {
         qCWarning(logSql, "Error while executing statement '%s'", qPrintable(query.lastError().text()));
     }
 }
 
 void SqlHelper::requestSubmission(SqlInterface *object)
 {
     if (!timer.isActive()) {
         timer.start();
     }
 
     objects.append(object);
 }
 
 void SqlHelper::collectSubmissions()
 {
     exec(QLatin1String("BEGIN"));
 
     for (int i = 0; i < objects.size(); ++i) {
         objects.at(i)->sqlSubmit();
     }
 
     exec(QLatin1String("COMMIT"));
     timer.stop();
     objects.clear();
 }
 
 SqlHelper *SqlHelper::instance = NULL;
 
 #include "moc_sqlhelper.cpp"