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/*
Database.cpp
This file is part of Charm, a task-based time tracking application.
Copyright (C) 2008-2018 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
Author: Mirko Boehm <mirko.boehm@kdab.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, see <http://www.gnu.org/licenses/>.
*/
#include "Database.h"
#include "Exceptions.h"
#include "Core/CharmExceptions.h"
#include <QSqlDatabase>
#include <QSqlDriver>
#include <QSqlError>
#include <QSqlQuery>
#include <QSqlRecord>
#include <QObject>
#include <QVariant>
#include <QStringList>
#include <cstdlib>
Database::Database()
{
}
Database::~Database()
{
}
void Database::checkUserid(int id) throw (TimesheetProcessorException)
{
User user = m_storage.getUser(id);
if (!user.isValid())
throw TimesheetProcessorException(QStringLiteral("No such user"));
}
User Database::getOrCreateUserByName(QString name) throw (TimesheetProcessorException)
{
User user;
QSqlQuery query(database());
query.prepare(QStringLiteral("SELECT user_id from Users WHERE name = :user_name;"));
query.bindValue(QStringLiteral(":user_name"), name);
bool result = query.exec();
if (result) {
if (query.next()) {
int userIdPosition = query.record().indexOf(QStringLiteral("user_id"));
Q_ASSERT(userIdPosition != -1);
int userId = query.value(userIdPosition).toInt();
user = m_storage.getUser(userId);
} else { // user with this name does not exist:
user = m_storage.makeUser(name); // that should work
if (!user.isValid())
throw TimesheetProcessorException(QStringLiteral("Cannot create the new user"));
}
} else {
throw TimesheetProcessorException(QStringLiteral("Cannot execute query for user name"));
}
return user;
}
Task Database::getTask(int taskid) throw (TimesheetProcessorException)
{
Task task = m_storage.getTask(taskid);
if (!task.isValid())
throw TimesheetProcessorException(QObject::tr("Invalid task %1 in report").arg(taskid));
return task;
}
TaskList Database::getAllTasks() throw(TimesheetProcessorException)
{
return m_storage.getAllTasks();
}
QSqlDatabase &Database::database()
{
return m_storage.database();
}
void Database::login() throw (TimesheetProcessorException)
{
MySqlStorage::Parameters parameters;
try {
parameters = MySqlStorage::parseParameterEnvironmentVariable();
} catch (ParseError &e) {
throw TimesheetProcessorException(e.what());
}
m_storage.configure(parameters);
bool ok = m_storage.database().open();
if (!ok) {
QSqlError error = m_storage.database().lastError();
QString msg = QObject::tr("Cannot connect to database %1 on host %2, database said "
"\"%3\", driver said \"%4\"")
.arg(parameters.database).arg(parameters.host)
.arg(error.driverText())
.arg(error.databaseText());
throw TimesheetProcessorException(msg);
}
// check if the driver has transaction support
if (!m_storage.database().driver()->hasFeature(QSqlDriver::Transactions)) {
QString msg = QObject::tr(
"The database driver in use does not support transactions. Transactions are required.");
throw TimesheetProcessorException(msg);
}
}
void Database::initializeDatabase() throw (TimesheetProcessorException)
{
try {
QStringList tables = m_storage.database().tables();
if (!tables.empty()) {
throw TimesheetProcessorException(QStringLiteral("The database is not empty. Only "
"empty databases can be automatically initialized."));
}
if (!m_storage.createDatabaseTables())
throw TimesheetProcessorException(QStringLiteral(
"Cannot create database contents, please double-check permissions."));
} catch (UnsupportedDatabaseVersionException &e) {
throw TimesheetProcessorException(e.what());
}
}
void Database::addEvent(const Event &event, const SqlRaiiTransactor &t)
{
Event newEvent = m_storage.makeEvent(t);
int id = newEvent.id();
newEvent = event;
newEvent.setId(id);
if (!m_storage.modifyEvent(newEvent, t))
throw TimesheetProcessorException(QStringLiteral("Cannot add event"));
}
void Database::deleteEventsForReport(int userid, int index)
{
// delete the time sheet: pretty straightforward
QString statement = QString::fromLocal8Bit(
"DELETE FROM Events WHERE report_id = :index and user_id = :userid");
QSqlQuery query(m_storage.database());
query.prepare(statement);
query.bindValue(QStringLiteral(":index"), index);
query.bindValue(QStringLiteral(":userid"), userid);
bool result = query.exec();
if (!result)
throw TimesheetProcessorException(QStringLiteral("Failed to delete report"));
}
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