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/*********************************************************************************
NixNote - An open-source client for the Evernote service.
Copyright (C) 2013 Randy Baumgarte
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 "configstore.h"
#include "global.h"
#include "sql/nsqlquery.h"
#include <QVariant>
extern Global global;
//**********************
// Generic constructor.
//**********************
ConfigStore::ConfigStore(DatabaseConnection *conn)
{
db = conn;
db->lockForRead();
// Check if the database exists. If not, create it.
NSqlQuery sql(db);
sql.exec("Select * from sqlite_master where type='table' and name='ConfigStore';");
if (!sql.next()) {
db->unlock();
sql.finish();
this->createTable();
return;
}
sql.finish();
db->unlock();
}
//********************************************
// Create the table & set the initial values
//********************************************
void ConfigStore::createTable() {
QLOG_TRACE() << "Entering ConfigStore::createTable()";
QLOG_DEBUG() << "Creating table ConfigStore";
NSqlQuery sql(db);
db->lockForWrite();
// build the SQL command & cretae the table
QString command("Create table if not exists ConfigStore (" +
QString("key integer primary key not null unique,") +
QString("value blob)"));
if (!sql.exec(command)) {
QLOG_ERROR() << "Creation of ConfigStore table failed: " << sql.lastError();
sql.finish();
db->unlock();
} else {
// insert default values into the new table
this->initTable();
sql.finish();
db->unlock();
}
}
//*******************************************
// Insert default values into the new table
//*******************************************
void ConfigStore::initTable() {
QLOG_TRACE() << "Entering ConfigStore::initTable()";
QLOG_DEBUG() << "Initializing table ConfigStore";
db->lockForWrite();
NSqlQuery sql(db);
sql.prepare("Insert into ConfigStore (key, value) values (:key, :value);");
sql.bindValue(":key", CONFIG_STORE_LID);
sql.bindValue(":value", 0);
if (!sql.exec()) {
QLOG_ERROR() << "Insertion of initial counter failed: " << sql.lastError();
}
sql.finish();
db->unlock();
}
//*******************************************************************
// Every time we add a new object, we call this to get its unique
// local ID. This number never changes
//*******************************************************************
qint32 ConfigStore::incrementLidCounter() {
db->lockForWrite();
NSqlQuery sql(db);
// Prepare the SQL statement & fetch the row
sql.prepare("Select value from ConfigStore where key=:key");
sql.bindValue(":key", CONFIG_STORE_LID);
if (!sql.exec()) {
QLOG_ERROR() << "Fetch of ConfigStore LID counter statement failed: " << sql.lastError();
}
if (!sql.next()) {
QLOG_ERROR() << "Fetch from ConfigStore failure: LID NOT FOUND!!!";
} else {
// Now that we have the next lid, increment the number & save it
qint32 sequence = QVariant(sql.value(0)).toInt();
sequence++;
db->lockForWrite();
sql.prepare("Update ConfigStore set value=:lid where key=:key;");
sql.bindValue(":lid",sequence);
sql.bindValue(":key", CONFIG_STORE_LID);
if (!sql.exec()) {
QLOG_ERROR() << "Error updating sequence number: " << sql.lastError();
}
sql.finish();
db->unlock();
// Return the next lid to the caller
return sequence;
}
sql.finish();
db->unlock();
return -1;
}
//*******************************************************************
// Save a setting to the DB
//*******************************************************************
void ConfigStore::saveSetting(int key, QByteArray value) {
NSqlQuery sql(db);
// Prepare the SQL statement & fetch the row
db->lockForWrite();
sql.prepare("Delete from ConfigStore where key=:key");
sql.bindValue(":key", key);
sql.exec();
sql.prepare("insert into ConfigStore (key, value) values (:key, :value)");
sql.bindValue(":key", key);
sql.bindValue(":value", value);
sql.exec();
sql.finish();
db->unlock();
}
//*******************************************************************
// Return a value from the DB
//*******************************************************************
bool ConfigStore::getSetting(QByteArray &value, int key) {
db->lockForRead();
NSqlQuery sql(db);
sql.prepare("select value from ConfigStore where key=:key");
sql.bindValue(":key", key);
sql.exec();
while (sql.next()) {
value = sql.value(0).toByteArray();
sql.finish();
db->unlock();
return true;
}
sql.finish();
db->unlock();
return false;
}
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