////  AssignmentClient.cpp//  assignment-client/src////  Created by Stephen Birarda on 11/25/2013.//  Copyright 2013 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include <QtCore/QProcess>#include <QtCore/QThread>#include <QtCore/QTimer> #include <AccountManager.h>#include <Assignment.h>#include <Logging.h>#include <NodeList.h>#include <PacketHeaders.h>#include <SharedUtil.h>  #include "AssignmentFactory.h"#include "AssignmentThread.h" #include "AssignmentClient.h" const QString ASSIGNMENT_CLIENT_TARGET_NAME = "assignment-client";const long long ASSIGNMENT_REQUEST_INTERVAL_MSECS = 1 * 1000; SharedAssignmentPointer AssignmentClient::_currentAssignment; int hifiSockAddrMeta = qRegisterMetaType<HifiSockAddr>("HifiSockAddr"); AssignmentClient::AssignmentClient(int &argc, char **argv) :    QCoreApplication(argc, argv),    _assignmentServerHostname(DEFAULT_ASSIGNMENT_SERVER_HOSTNAME){    setOrganizationName("High Fidelity");    setOrganizationDomain("highfidelity.io");    setApplicationName("assignment-client");    QSettings::setDefaultFormat(QSettings::IniFormat);        QStringList argumentList = arguments();        // register meta type is required for queued invoke method on Assignment subclasses        // set the logging target to the the CHILD_TARGET_NAME    Logging::setTargetName(ASSIGNMENT_CLIENT_TARGET_NAME);        const QString ASSIGNMENT_TYPE_OVVERIDE_OPTION = "-t";    int argumentIndex = argumentList.indexOf(ASSIGNMENT_TYPE_OVVERIDE_OPTION);        Assignment::Type requestAssignmentType = Assignment::AllTypes;        if (argumentIndex != -1) {        requestAssignmentType = (Assignment::Type) argumentList[argumentIndex + 1].toInt();    }        const QString ASSIGNMENT_POOL_OPTION = "--pool";        argumentIndex = argumentList.indexOf(ASSIGNMENT_POOL_OPTION);        QString assignmentPool;        if (argumentIndex != -1) {        assignmentPool = argumentList[argumentIndex + 1];    }        // setup our _requestAssignment member variable from the passed arguments    _requestAssignment = Assignment(Assignment::RequestCommand, requestAssignmentType, assignmentPool);        // check if we were passed a wallet UUID on the command line    // this would represent where the user running AC wants funds sent to        const QString ASSIGNMENT_WALLET_DESTINATION_ID_OPTION = "--wallet";    if ((argumentIndex = argumentList.indexOf(ASSIGNMENT_WALLET_DESTINATION_ID_OPTION)) != -1) {        QUuid walletUUID = QString(argumentList[argumentIndex + 1]);        qDebug() << "The destination wallet UUID for credits is" << uuidStringWithoutCurlyBraces(walletUUID);        _requestAssignment.setWalletUUID(walletUUID);    }        // create a NodeList as an unassigned client    NodeList* nodeList = NodeList::createInstance(NodeType::Unassigned);        // check for an overriden assignment server hostname    const QString CUSTOM_ASSIGNMENT_SERVER_HOSTNAME_OPTION = "-a";        argumentIndex = argumentList.indexOf(CUSTOM_ASSIGNMENT_SERVER_HOSTNAME_OPTION);        if (argumentIndex != -1) {        _assignmentServerHostname = argumentList[argumentIndex + 1];                // set the custom assignment socket on our NodeList        HifiSockAddr customAssignmentSocket = HifiSockAddr(_assignmentServerHostname, DEFAULT_DOMAIN_SERVER_PORT);                nodeList->setAssignmentServerSocket(customAssignmentSocket);    }        // call a timer function every ASSIGNMENT_REQUEST_INTERVAL_MSECS to ask for assignment, if required    qDebug() << "Waiting for assignment -" << _requestAssignment;        QTimer* timer = new QTimer(this);    connect(timer, SIGNAL(timeout()), SLOT(sendAssignmentRequest()));    timer->start(ASSIGNMENT_REQUEST_INTERVAL_MSECS);        // connect our readPendingDatagrams method to the readyRead() signal of the socket    connect(&nodeList->getNodeSocket(), &QUdpSocket::readyRead, this, &AssignmentClient::readPendingDatagrams);        // connections to AccountManager for authentication    connect(&AccountManager::getInstance(), &AccountManager::authRequired,            this, &AssignmentClient::handleAuthenticationRequest);} void AssignmentClient::sendAssignmentRequest() {    if (!_currentAssignment) {        NodeList::getInstance()->sendAssignment(_requestAssignment);    }} void AssignmentClient::readPendingDatagrams() {    NodeList* nodeList = NodeList::getInstance();        QByteArray receivedPacket;    HifiSockAddr senderSockAddr;        while (nodeList->getNodeSocket().hasPendingDatagrams()) {        receivedPacket.resize(nodeList->getNodeSocket().pendingDatagramSize());        nodeList->getNodeSocket().readDatagram(receivedPacket.data(), receivedPacket.size(),                                               senderSockAddr.getAddressPointer(), senderSockAddr.getPortPointer());                if (nodeList->packetVersionAndHashMatch(receivedPacket)) {            if (packetTypeForPacket(receivedPacket) == PacketTypeCreateAssignment) {                // construct the deployed assignment from the packet data                _currentAssignment = SharedAssignmentPointer(AssignmentFactory::unpackAssignment(receivedPacket));                                if (_currentAssignment) {                    qDebug() << "Received an assignment -" << *_currentAssignment;                                        // switch our DomainHandler hostname and port to whoever sent us the assignment                                        nodeList->getDomainHandler().setSockAddr(senderSockAddr, _assignmentServerHostname);                    nodeList->getDomainHandler().setAssignmentUUID(_currentAssignment->getUUID());                                        qDebug() << "Destination IP for assignment is" << nodeList->getDomainHandler().getIP().toString();                                        // start the deployed assignment                    AssignmentThread* workerThread = new AssignmentThread(_currentAssignment, this);                                        connect(workerThread, &QThread::started, _currentAssignment.data(), &ThreadedAssignment::run);                    connect(_currentAssignment.data(), &ThreadedAssignment::finished, workerThread, &QThread::quit);                    connect(_currentAssignment.data(), &ThreadedAssignment::finished,                            this, &AssignmentClient::assignmentCompleted);                    connect(workerThread, &QThread::finished, workerThread, &QThread::deleteLater);                                        _currentAssignment->moveToThread(workerThread);                                        // move the NodeList to the thread used for the _current assignment                    nodeList->moveToThread(workerThread);                                        // let the assignment handle the incoming datagrams for its duration                    disconnect(&nodeList->getNodeSocket(), 0, this, 0);                    connect(&nodeList->getNodeSocket(), &QUdpSocket::readyRead, _currentAssignment.data(),                            &ThreadedAssignment::readPendingDatagrams);                                        // Starts an event loop, and emits workerThread->started()                    workerThread->start();                } else {                    qDebug() << "Received an assignment that could not be unpacked. Re-requesting.";                }            } else {                // have the NodeList attempt to handle it                nodeList->processNodeData(senderSockAddr, receivedPacket);            }        }    }} void AssignmentClient::handleAuthenticationRequest() {    const QString DATA_SERVER_USERNAME_ENV = "HIFI_AC_USERNAME";    const QString DATA_SERVER_PASSWORD_ENV = "HIFI_AC_PASSWORD";        // this node will be using an authentication server, let's make sure we have a username/password    QProcessEnvironment sysEnvironment = QProcessEnvironment::systemEnvironment();        QString username = sysEnvironment.value(DATA_SERVER_USERNAME_ENV);    QString password = sysEnvironment.value(DATA_SERVER_PASSWORD_ENV);        AccountManager& accountManager = AccountManager::getInstance();        if (!username.isEmpty() && !password.isEmpty()) {        // ask the account manager to log us in from the env variables        accountManager.requestAccessToken(username, password);    } else {        qDebug() << "Authentication was requested against" << qPrintable(accountManager.getAuthURL().toString())            << "but both or one of" << qPrintable(DATA_SERVER_USERNAME_ENV)            << "/" << qPrintable(DATA_SERVER_PASSWORD_ENV) << "are not set. Unable to authenticate.";                return;    }} void AssignmentClient::assignmentCompleted() {    // reset the logging target to the the CHILD_TARGET_NAME    Logging::setTargetName(ASSIGNMENT_CLIENT_TARGET_NAME);        qDebug("Assignment finished or never started - waiting for new assignment.");        NodeList* nodeList = NodeList::getInstance();     // have us handle incoming NodeList datagrams again    disconnect(&nodeList->getNodeSocket(), 0, _currentAssignment.data(), 0);    connect(&nodeList->getNodeSocket(), &QUdpSocket::readyRead, this, &AssignmentClient::readPendingDatagrams);        // clear our current assignment shared pointer now that we're done with it    // if the assignment thread is still around it has its own shared pointer to the assignment    _currentAssignment.clear();     // reset our NodeList by switching back to unassigned and clearing the list    nodeList->setOwnerType(NodeType::Unassigned);    nodeList->reset();    nodeList->resetNodeInterestSet();}