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++ // Copyright (C) 2016 Alex Trotsenko <alex1973tr@gmail.com>
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include <QtWidgets>
++ #include <QtNetwork>
++
++ #include "client.h"
++ #include "movieconsumer.h"
++ #include "timeconsumer.h"
++ #include "chatconsumer.h"
++
++ #include "sctpchannels.h"
++
++ Client::Client(QWidget *parent)
++ : QDialog(parent)
++ , consumers(SctpChannels::NumberOfChannels)
++ {
++ setWindowTitle(tr("Multi-stream Client"));
++
++ sctpSocket = new QSctpSocket(this);
++
++ QLabel *hostLabel = new QLabel(tr("&Server name:"));
++ QLabel *portLabel = new QLabel(tr("S&erver port:"));
++
++ hostCombo = new QComboBox;
++ hostCombo->setEditable(true);
++ // find out name of this machine
++ QString name = QHostInfo::localHostName();
++ if (!name.isEmpty()) {
++ hostCombo->addItem(name);
++ QString domain = QHostInfo::localDomainName();
++ if (!domain.isEmpty())
++ hostCombo->addItem(name + QChar('.') + domain);
++ }
++ if (name != QString("localhost"))
++ hostCombo->addItem(QString("localhost"));
++ // find out IP addresses of this machine
++ QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
++ // add non-localhost addresses
++ for (int i = 0; i < ipAddressesList.size(); ++i) {
++ if (!ipAddressesList.at(i).isLoopback())
++ hostCombo->addItem(ipAddressesList.at(i).toString());
++ }
++ // add localhost addresses
++ for (int i = 0; i < ipAddressesList.size(); ++i) {
++ if (ipAddressesList.at(i).isLoopback())
++ hostCombo->addItem(ipAddressesList.at(i).toString());
++ }
++
++ portLineEdit = new QLineEdit;
++ portLineEdit->setValidator(new QIntValidator(1, 65535, this));
++
++ hostLabel->setBuddy(hostCombo);
++ portLabel->setBuddy(portLineEdit);
++
++ connectButton = new QPushButton(tr("Connect"));
++ connectButton->setDefault(true);
++ connectButton->setEnabled(false);
++
++ QPushButton *quitButton = new QPushButton(tr("Quit"));
++ quitButton->setAutoDefault(false);
++
++ QDialogButtonBox *buttonBox = new QDialogButtonBox;
++ buttonBox->addButton(connectButton, QDialogButtonBox::ActionRole);
++ buttonBox->addButton(quitButton, QDialogButtonBox::AcceptRole);
++
++ QLabel *movieLabel = new QLabel(tr("Movie stream:"));
++ consumers[SctpChannels::Movie] = new MovieConsumer(this);
++ QLabel *timeLabel = new QLabel(tr("Time stream:"));
++ consumers[SctpChannels::Time] = new TimeConsumer(this);
++ QLabel *chatLabel = new QLabel(tr("&Chat:"));
++ consumers[SctpChannels::Chat] = new ChatConsumer(this);
++ chatLabel->setBuddy(consumers[SctpChannels::Chat]->widget());
++
++ connect(hostCombo, &QComboBox::editTextChanged, this, &Client::enableConnectButton);
++ connect(portLineEdit, &QLineEdit::textChanged, this, &Client::enableConnectButton);
++ connect(connectButton, &QPushButton::clicked, this, &Client::requestConnect);
++ connect(buttonBox, &QDialogButtonBox::accepted, this, &Client::accept);
++ connect(sctpSocket, &QSctpSocket::connected, this, &Client::connected);
++ connect(sctpSocket, &QSctpSocket::disconnected, this, &Client::disconnected);
++ connect(sctpSocket, &QSctpSocket::channelReadyRead, this, &Client::readDatagram);
++ connect(sctpSocket, &QSctpSocket::errorOccurred, this, &Client::displayError);
++ connect(consumers[SctpChannels::Time], &Consumer::writeDatagram, this, &Client::writeDatagram);
++ connect(consumers[SctpChannels::Chat], &Consumer::writeDatagram, this, &Client::writeDatagram);
++
++ QGridLayout *mainLayout = new QGridLayout;
++ mainLayout->addWidget(hostLabel, 0, 0);
++ mainLayout->addWidget(hostCombo, 0, 1);
++ mainLayout->addWidget(portLabel, 1, 0);
++ mainLayout->addWidget(portLineEdit, 1, 1);
++ mainLayout->addWidget(buttonBox, 2, 0, 1, 2);
++ mainLayout->addWidget(movieLabel, 3, 0);
++ mainLayout->addWidget(timeLabel, 3, 1);
++ mainLayout->addWidget(consumers[SctpChannels::Movie]->widget(), 4, 0);
++ mainLayout->addWidget(consumers[SctpChannels::Time]->widget(), 4, 1);
++ mainLayout->addWidget(chatLabel, 5, 0);
++ mainLayout->addWidget(consumers[SctpChannels::Chat]->widget(), 6, 0, 1, 2);
++ setLayout(mainLayout);
++
++ portLineEdit->setFocus();
++ }
++
++ Client::~Client()
++ {
++ delete sctpSocket;
++ }
++
++ void Client::connected()
++ {
++ consumers[SctpChannels::Chat]->widget()->setFocus();
++ }
++
++ void Client::disconnected()
++ {
++ for (Consumer *consumer : consumers)
++ consumer->serverDisconnected();
++
++ sctpSocket->close();
++ }
++
++ void Client::requestConnect()
++ {
++ connectButton->setEnabled(false);
++ sctpSocket->abort();
++ sctpSocket->connectToHost(hostCombo->currentText(),
++ portLineEdit->text().toInt());
++ }
++
++ void Client::readDatagram(int channel)
++ {
++ sctpSocket->setCurrentReadChannel(channel);
++ consumers[channel]->readDatagram(sctpSocket->readDatagram().data());
++ }
++
++ void Client::displayError(QAbstractSocket::SocketError socketError)
++ {
++ switch (socketError) {
++ case QAbstractSocket::HostNotFoundError:
++ QMessageBox::information(this, tr("Multi-stream Client"),
++ tr("The host was not found. Please check the "
++ "host name and port settings."));
++ break;
++ case QAbstractSocket::ConnectionRefusedError:
++ QMessageBox::information(this, tr("Multi-stream Client"),
++ tr("The connection was refused by the peer. "
++ "Make sure the multi-stream server is running, "
++ "and check that the host name and port "
++ "settings are correct."));
++ break;
++ default:
++ QMessageBox::information(this, tr("Multi-stream Client"),
++ tr("The following error occurred: %1.")
++ .arg(sctpSocket->errorString()));
++ }
++
++ enableConnectButton();
++ }
++
++ void Client::enableConnectButton()
++ {
++ connectButton->setEnabled(!hostCombo->currentText().isEmpty() &&
++ !portLineEdit->text().isEmpty());
++ }
++
++ void Client::writeDatagram(const QByteArray &ba)
++ {
++ if (sctpSocket->isValid() && sctpSocket->state() == QAbstractSocket::ConnectedState) {
++ sctpSocket->setCurrentWriteChannel(consumers.indexOf(static_cast<Consumer *>(sender())));
++ sctpSocket->writeDatagram(ba);
++ }
++ }