Use optional instead of hardcoded cancelled string

Signed-off-by: TheKodeToad <TheKodeToad@proton.me>

launcher/ui/GuiUtil.cpp

@@ -50,7 +50,7 @@
 #include <DesktopServices.h>
 #include <BuildConfig.h>
 
-QString GuiUtil::uploadPaste(const QString &name, const QString &text, QWidget *parentWidget)
+std::optional<QString> GuiUtil::uploadPaste(const QString &name, const QString &text, QWidget *parentWidget)
 {
     ProgressDialog dialog(parentWidget);
     auto pasteTypeSetting = static_cast<PasteUpload::PasteType>(APPLICATION->settings()->get("PastebinType").toInt());
@@ -63,7 +63,8 @@ QString GuiUtil::uploadPaste(const QString &name, const QString &text, QWidget *
         else
             baseUrl = pasteCustomAPIBaseSetting;
 
-        if (baseUrl.isValid()) {
+        if (baseUrl.isValid())
+        {
             auto response = CustomMessageBox::selectable(parentWidget, QObject::tr("Confirm Upload"),
                                                          QObject::tr("You are about to upload \"%1\" to %2.\n"
                                                                      "You should double-check for personal information.\n\n"
@@ -73,7 +74,7 @@ QString GuiUtil::uploadPaste(const QString &name, const QString &text, QWidget *
                                 ->exec();
 
             if (response != QMessageBox::Yes)
-                return "canceled";
+                return {};
         }
     }
 

launcher/ui/GuiUtil.h

@@ -1,10 +1,11 @@
 #pragma once
 
 #include <QWidget>
+#include <optional>
 
 namespace GuiUtil
 {
-QString uploadPaste(const QString &name, const QString &text, QWidget *parentWidget);
+std::optional<QString> uploadPaste(const QString &name, const QString &text, QWidget *parentWidget);
 void setClipboardText(const QString &text);
 QStringList BrowseForFiles(QString context, QString caption, QString filter, QString defaultPath, QWidget *parentWidget);
 QString BrowseForFile(QString context, QString caption, QString filter, QString defaultPath, QWidget *parentWidget);

launcher/ui/pages/instance/LogPage.cpp

@@ -283,17 +283,18 @@ void LogPage::on_btnPaste_clicked()
         )
     );
     auto url = GuiUtil::uploadPaste(tr("Minecraft Log"), m_model->toPlainText(), this);
-    if(url == "canceled")
+    if(!url.has_value())
     {
         m_model->append(MessageLevel::Error, QString("Log upload canceled"));
     }
-    else if(!url.isEmpty())
+    else if (url->isNull())
     {
-        m_model->append(MessageLevel::Launcher, QString("Log uploaded to: %1").arg(url));
-    }
-    else {
         m_model->append(MessageLevel::Error, QString("Log upload failed!"));
     }
+    else
+    {
+        m_model->append(MessageLevel::Launcher, QString("Log uploaded to: %1").arg(url.value()));
+    }
 }
 
 void LogPage::on_btnCopy_clicked()