Add missing files for review

Signed-off-by: AMZN-Phil <pconroy@amazon.com>

Code/Tools/ProjectManager/Source/O3DEObjectDownloadController.cpp

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+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#include <O3DEObjectDownloadController.h>
+#include <O3DEObjectDownloadWorker.h>
+#include <ProjectButtonWidget.h>
+
+#include <QMessageBox>
+#include <QDesktopServices>
+#include <QUrl>
+
+
+namespace O3DE::ProjectManager
+{
+    O3DEObjectDownloadController::O3DEObjectDownloadController(QWidget* parent)
+        : QObject()
+        , m_lastProgress(0)
+        , m_parent(parent)
+    {
+        m_worker = new O3DEObjectDownloadWorker();
+        m_worker->moveToThread(&m_workerThread);
+
+        connect(&m_workerThread, &QThread::started, m_worker, &O3DEObjectDownloadWorker::StartDownload);
+        connect(m_worker, &O3DEObjectDownloadWorker::Done, this, &O3DEObjectDownloadController::HandleResults);
+        connect(m_worker, &O3DEObjectDownloadWorker::UpdateProgress, this, &O3DEObjectDownloadController::UpdateUIProgress);
+        connect(this, &O3DEObjectDownloadController::StartGemDownload, m_worker, &O3DEObjectDownloadWorker::StartDownload);
+    }
+
+    O3DEObjectDownloadController::~O3DEObjectDownloadController()
+    {
+        connect(&m_workerThread, &QThread::finished, m_worker, &O3DEObjectDownloadWorker::deleteLater);
+        m_workerThread.requestInterruption();
+        m_workerThread.quit();
+        m_workerThread.wait();
+    }
+
+    void O3DEObjectDownloadController::AddGemDownload(const QString& gemName)
+    {
+        m_gemNames.push_back(gemName);
+        if (m_gemNames.size() == 1)
+        {
+            m_worker->SetGemToDownload(m_gemNames[0], false);
+            m_workerThread.start();
+        }
+    }
+
+    void O3DEObjectDownloadController::Start()
+    {
+        
+    }
+
+    void O3DEObjectDownloadController::UpdateUIProgress(int progress)
+    {
+        m_lastProgress = progress;
+        emit GemDownloadProgress(progress);
+    }
+
+    void O3DEObjectDownloadController::HandleResults(const QString& result)
+    {
+        bool succeeded = true;
+        
+        if (!result.isEmpty())
+        {
+            QMessageBox::critical(nullptr, tr("Gem download"), result);
+            succeeded = false;
+        }
+
+        m_gemNames.erase(m_gemNames.begin());
+        emit Done(succeeded);
+
+        if (!m_gemNames.empty())
+        {
+            emit StartGemDownload(m_gemNames[0]);
+        }
+        else
+        {
+            m_workerThread.quit();
+            m_workerThread.wait();
+        }
+    }
+
+    void O3DEObjectDownloadController::HandleCancel()
+    {
+        m_workerThread.quit();
+        emit Done(false);
+    }
+} // namespace O3DE::ProjectManager

Code/Tools/ProjectManager/Source/O3DEObjectDownloadController.h

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+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+#pragma once
+
+#if !defined(Q_MOC_RUN)
+#include <QString>
+#include <QThread>
+#include <AzCore/std/containers/vector.h>
+#endif
+
+QT_FORWARD_DECLARE_CLASS(QProcess)
+
+namespace O3DE::ProjectManager
+{
+    QT_FORWARD_DECLARE_CLASS(O3DEObjectDownloadWorker)
+
+    class O3DEObjectDownloadController : public QObject
+    {
+        Q_OBJECT
+
+    public:
+        explicit O3DEObjectDownloadController(QWidget* parent = nullptr);
+        ~O3DEObjectDownloadController();
+
+        void AddGemDownload(const QString& m_gemName);
+
+        bool IsDownloadQueueEmpty()
+        {
+            return m_gemNames.empty();
+        }
+
+        const AZStd::vector<QString>& GetDownloadQueue() const
+        {
+            return m_gemNames;
+        }
+
+        const QString& GetCurrentDownloadingGem() const
+        {
+            return m_gemNames[0];
+        }
+    public slots:
+        void Start();
+        void UpdateUIProgress(int progress);
+        void HandleResults(const QString& result);
+        void HandleCancel();
+
+    signals:
+        void StartGemDownload(const QString& gemName);
+        void Done(bool success = true);
+        void GemDownloadProgress(int percentage);
+
+    private:
+        O3DEObjectDownloadWorker* m_worker;
+        QThread m_workerThread;
+        QWidget* m_parent;
+        AZStd::vector<QString> m_gemNames;
+
+        int m_lastProgress;
+    };
+} // namespace O3DE::ProjectManager

Code/Tools/ProjectManager/Source/O3DEObjectDownloadWorker.cpp

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+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#include <O3DEObjectDownloadController.h>
+#include <O3DEObjectDownloadWorker.h>
+#include <PythonBindings.h>
+
+#include <QMessageBox>
+#include <QDesktopServices>
+#include <QUrl>
+
+
+namespace O3DE::ProjectManager
+{
+    O3DEObjectDownloadWorker::O3DEObjectDownloadWorker()
+        : QObject()
+    {
+    }
+
+    void O3DEObjectDownloadWorker::StartDownload()
+    {
+        auto gemDownloadProgress = [=](int downloadProgress)
+        {
+            m_downloadProgress = downloadProgress;
+            emit UpdateProgress(downloadProgress);
+        };
+        AZ::Outcome<void, AZStd::string> gemInfoResult = PythonBindingsInterface::Get()->DownloadGem(m_gemName, gemDownloadProgress);
+        if (gemInfoResult.IsSuccess())
+        {
+            emit Done("");
+        }
+        else
+        {
+            emit Done(tr("Gem download failed"));
+        }
+    }
+
+    void O3DEObjectDownloadWorker::SetGemToDownload(const QString& gemName, bool downloadNow)
+    {
+        m_gemName = gemName;
+        if (downloadNow)
+        {
+            StartDownload();
+        }
+    }
+
+} // namespace O3DE::ProjectManager

Code/Tools/ProjectManager/Source/O3DEObjectDownloadWorker.h

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+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+#pragma once
+
+#if !defined(Q_MOC_RUN)
+#include <AzCore/Outcome/Outcome.h>
+
+#include <QObject>
+#include <QProcessEnvironment>
+#include <QString>
+#endif
+
+QT_FORWARD_DECLARE_CLASS(QProcess)
+
+namespace O3DE::ProjectManager
+{
+    class O3DEObjectDownloadWorker : public QObject
+    {
+        // QProcess::waitForFinished uses -1 to indicate that the process should not timeout
+        static constexpr int MaxBuildTimeMSecs = -1;
+        // Download was cancelled
+        inline static const QString DownloadCancelled = QObject::tr("Download Cancelled.");
+
+        Q_OBJECT
+
+    public:
+        explicit O3DEObjectDownloadWorker();
+        ~O3DEObjectDownloadWorker() = default;
+
+    public slots:
+        void StartDownload();
+        void SetGemToDownload(const QString& gemName, bool downloadNow = true);
+
+    signals:
+        void UpdateProgress(int progress);
+        void Done(QString result = "");
+
+    private:
+
+        QProcess* m_configProjectProcess = nullptr;
+        QProcess* m_buildProjectProcess = nullptr;
+
+        QString m_gemName;
+        int m_downloadProgress;
+    };
+} // namespace O3DE::ProjectManager