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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "sqlconversationmodel.h"
#include <QDateTime>
#include <QDebug>
#include <QSqlError>
#include <QSqlRecord>
#include <QSqlQuery>
static const char *conversationsTableName = "Conversations";
static void createTable()
{
if (QSqlDatabase::database().tables().contains(conversationsTableName)) {
// The table already exists; we don't need to do anything.
return;
}
QSqlQuery query;
if (!query.exec(
"CREATE TABLE IF NOT EXISTS 'Conversations' ("
"'author' TEXT NOT NULL,"
"'recipient' TEXT NOT NULL,"
"'timestamp' TEXT NOT NULL,"
"'message' TEXT NOT NULL,"
"FOREIGN KEY('author') REFERENCES Contacts ( name ),"
"FOREIGN KEY('recipient') REFERENCES Contacts ( name )"
")")) {
qFatal("Failed to query database: %s", qPrintable(query.lastError().text()));
}
query.exec("INSERT INTO Conversations VALUES('Me', 'Ernest Hemingway', '2016-01-07T14:36:06', 'Hello!')");
query.exec("INSERT INTO Conversations VALUES('Ernest Hemingway', 'Me', '2016-01-07T14:36:16', 'Good afternoon.')");
query.exec("INSERT INTO Conversations VALUES('Me', 'Albert Einstein', '2016-01-01T11:24:53', 'Hi!')");
query.exec("INSERT INTO Conversations VALUES('Albert Einstein', 'Me', '2016-01-07T14:36:16', 'Good morning.')");
query.exec("INSERT INTO Conversations VALUES('Hans Gude', 'Me', '2015-11-20T06:30:02', 'God morgen. Har du fått mitt maleri?')");
query.exec("INSERT INTO Conversations VALUES('Me', 'Hans Gude', '2015-11-20T08:21:03', 'God morgen, Hans. Ja, det er veldig fint. Tusen takk! "
"Hvor mange timer har du brukt på den?')");
}
SqlConversationModel::SqlConversationModel(QObject *parent) :
QSqlTableModel(parent)
{
createTable();
setTable(conversationsTableName);
setSort(2, Qt::DescendingOrder);
// Ensures that the model is sorted correctly after submitting a new row.
setEditStrategy(QSqlTableModel::OnManualSubmit);
}
QString SqlConversationModel::recipient() const
{
return m_recipient;
}
void SqlConversationModel::setRecipient(const QString &recipient)
{
if (recipient == m_recipient)
return;
m_recipient = recipient;
const QString filterString = QString::fromLatin1(
"(recipient = '%1' AND author = 'Me') OR (recipient = 'Me' AND author='%1')").arg(m_recipient);
setFilter(filterString);
select();
emit recipientChanged();
}
QVariant SqlConversationModel::data(const QModelIndex &index, int role) const
{
if (role < Qt::UserRole)
return QSqlTableModel::data(index, role);
const QSqlRecord sqlRecord = record(index.row());
return sqlRecord.value(role - Qt::UserRole);
}
QHash<int, QByteArray> SqlConversationModel::roleNames() const
{
QHash<int, QByteArray> names;
names[Qt::UserRole] = "author";
names[Qt::UserRole + 1] = "recipient";
names[Qt::UserRole + 2] = "timestamp";
names[Qt::UserRole + 3] = "message";
return names;
}
void SqlConversationModel::sendMessage(const QString &recipient, const QString &message)
{
const QString timestamp = QDateTime::currentDateTime().toString(Qt::ISODate);
QSqlRecord newRecord = record();
newRecord.setValue("author", "Me");
newRecord.setValue("recipient", recipient);
newRecord.setValue("timestamp", timestamp);
newRecord.setValue("message", message);
if (!insertRecord(rowCount(), newRecord)) {
qWarning() << "Failed to send message:" << lastError().text();
return;
}
submitAll();
}
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