Display dialog of crash handling options at startup if Interface crashed

Default option and Esc continue without taking any action.

interface/src/Application.cpp

@@ -257,6 +257,7 @@ bool setupEssentials(int& argc, char** argv) {
     // Set build version
     QCoreApplication::setApplicationVersion(BUILD_VERSION);
 
+    CrashHandler::checkForAndHandleCrash();
     CrashHandler::writeRunningMarkerFiler();
     qAddPostRoutine(CrashHandler::deleteRunningMarkerFile);
 

interface/src/CrashHandler.cpp

@@ -12,13 +12,72 @@
 #include "CrashHandler.h"
 
 #include <QCoreApplication>
+#include <QDialog>
+#include <QDialogButtonBox>
 #include <QFile>
+#include <QLabel>
 #include <PathUtils.h>
+#include <QRadioButton>
 #include <QSettings>
 #include <QStandardPaths>
+#include <QVBoxLayout>
 
 static const QString RUNNING_MARKER_FILENAME = "Interface.running";
 
+void CrashHandler::checkForAndHandleCrash() {
+    QFile runningMarkerFile(runningMarkerFilePath());
+    if (runningMarkerFile.exists()) {
+        Action action = promptUserForAction();
+        if (action != DO_NOTHING) {
+            handleCrash(action);
+        }
+    }
+}
+
+CrashHandler::Action CrashHandler::promptUserForAction() {
+    QDialog crashDialog;
+    crashDialog.setWindowTitle("Interface Crashed Last Run");
+
+    QVBoxLayout* layout = new QVBoxLayout;
+
+    QLabel* label = new QLabel("What would you like to do?");
+    layout->addWidget(label);
+
+    QRadioButton* option1 = new QRadioButton("Delete Interface.ini");
+    QRadioButton* option2 = new QRadioButton("Delete Interface.ini but retain login and avatar info.");
+    QRadioButton* option3 = new QRadioButton("Continue with my current Interface.ini");
+    option3->setChecked(true);
+    layout->addWidget(option1);
+    layout->addWidget(option2);
+    layout->addWidget(option3);
+    layout->addSpacing(12);
+    layout->addStretch();
+
+    QDialogButtonBox* buttons = new QDialogButtonBox(QDialogButtonBox::Ok);
+    layout->addWidget(buttons);
+    crashDialog.connect(buttons, SIGNAL(accepted()), SLOT(accept()));
+
+    crashDialog.setLayout(layout);
+
+    int result = crashDialog.exec();
+
+    if (result == QDialog::Accepted) {
+        if (option1->isChecked()) {
+            return CrashHandler::DELETE_INTERFACE;
+        }
+        if (option2->isChecked()) {
+            return CrashHandler::RETAIN_LOGIN_AND_AVATAR_INFO;
+        }
+    }
+
+    // Dialog cancelled or "do nothing" option chosen
+    return CrashHandler::DO_NOTHING;
+}
+
+void CrashHandler::handleCrash(CrashHandler::Action action) {
+    // TODO
+}
+
 void CrashHandler::writeRunningMarkerFiler() {
     QFile runningMarkerFile(runningMarkerFilePath());
     if (!runningMarkerFile.exists()) {

interface/src/CrashHandler.h

@@ -17,10 +17,21 @@
 class CrashHandler {
 
 public:
+    static void checkForAndHandleCrash();
+
     static void writeRunningMarkerFiler();
     static void deleteRunningMarkerFile();
 
 private:
+    enum Action {
+        DELETE_INTERFACE,
+        RETAIN_LOGIN_AND_AVATAR_INFO,
+        DO_NOTHING
+    };
+
+    static Action promptUserForAction();
+    static void handleCrash(Action action);
+
     static const QString runningMarkerFilePath();
 };