GUI for engine force registration and renaming (#6184)

Signed-off-by: Alex Peterson <26804013+AMZN-alexpete@users.noreply.github.com>

Code/Tools/ProjectManager/Source/Application.cpp

@@ -21,6 +21,7 @@
 #include <QApplication>
 #include <QDir>
 #include <QMessageBox>
+#include <QInputDialog>
 
 namespace O3DE::ProjectManager
 {
@@ -111,6 +112,11 @@ namespace O3DE::ProjectManager
             }
         }
 
+        if (!RegisterEngine(interactive))
+        {
+           return false;
+        }
+
         const AZ::CommandLine* commandLine = GetCommandLine();
         AZ_Assert(commandLine, "Failed to get command line");
 
@@ -165,6 +171,86 @@ namespace O3DE::ProjectManager
         return m_entity != nullptr;
     }
 
+    bool Application::RegisterEngine(bool interactive)
+    {
+        // get this engine's info
+        auto engineInfoOutcome = m_pythonBindings->GetEngineInfo();
+        if (!engineInfoOutcome)
+        {
+            if (interactive)
+            {
+                QMessageBox::critical(nullptr,
+                    QObject::tr("Failed to get engine info"),
+                    QObject::tr("A valid engine.json could not be found or loaded. "
+                                "Please verify a valid engine.json file exists in %1")
+                    .arg(GetEngineRoot()));
+            }
+
+            AZ_Error("Project Manager", false, "Failed to get engine info");
+            return false;
+        }
+
+        EngineInfo engineInfo = engineInfoOutcome.GetValue();
+        if (engineInfo.m_registered)
+        {
+            return true;
+        }
+
+        bool forceRegistration = false;
+
+        // check if an engine with this name is already registered
+        auto existingEngineResult = m_pythonBindings->GetEngineInfo(engineInfo.m_name);
+        if (existingEngineResult)
+        {
+            if (!interactive)
+            {
+                AZ_Error("Project Manager", false, "An engine with the name %s is already registered with the path %s",
+                    engineInfo.m_name.toUtf8().constData(), engineInfo.m_path.toUtf8().constData());
+                return false;
+            }
+
+            // get the updated engine name unless the user wants to cancel
+            bool okPressed = false;
+            const EngineInfo& otherEngineInfo = existingEngineResult.GetValue();
+
+            engineInfo.m_name = QInputDialog::getText(nullptr,
+                QObject::tr("Engine '%1' already registered").arg(engineInfo.m_name),
+                QObject::tr("An engine named '%1' is already registered.<br /><br />"
+                            "<b>Current path</b><br />%2<br/><br />"
+                            "<b>New path</b><br />%3<br /><br />"
+                            "Press 'OK' to force registration, or provide a new engine name below.<br />"
+                            "Alternatively, press `Cancel` to close the Project Manager and resolve the issue manually.")
+                            .arg(engineInfo.m_name, otherEngineInfo.m_path, engineInfo.m_path),
+                QLineEdit::Normal,
+                engineInfo.m_name,
+                &okPressed);
+
+            if (!okPressed)
+            {
+                // user elected not to change the name or force registration
+                return false;
+            }
+
+            forceRegistration = true;
+        }
+
+        auto registerOutcome = m_pythonBindings->SetEngineInfo(engineInfo, forceRegistration);
+        if (!registerOutcome)
+        {
+            if (interactive)
+            {
+                ProjectUtils::DisplayDetailedError(QObject::tr("Failed to register engine"), registerOutcome);
+            }
+            
+            AZ_Error("Project Manager", false, "Failed to register engine %s : %s",
+                engineInfo.m_path.toUtf8().constData(), registerOutcome.GetError().first.c_str());
+
+            return false;
+        }
+
+        return true;
+    }
+
     void Application::TearDown()
     {
         if (m_entity)