Allow progress ui failure

src/client/updater/progress_ui.cpp

@@ -5,7 +5,9 @@
 
 namespace updater
 {
-	progress_ui::progress_ui()
+	progress_ui::progress_ui(const bool allow_failure)
+	{
+		try
 		{
 			this->dialog_ = utils::com::create_progress_dialog();
 			if (!this->dialog_)
@@ -13,34 +15,62 @@ namespace updater
 				throw std::runtime_error{"Failed to create dialog"};
 			}
 		}
+		catch (...)
+		{
+			if (!allow_failure)
+			{
+				throw;
+			}
+		}
+	}
 
 	progress_ui::~progress_ui()
+	{
+		if (this->dialog_)
 		{
 			this->dialog_->StopProgressDialog();
 		}
+	}
 
 	void progress_ui::show() const
+	{
+		if (this->dialog_)
 		{
 			this->dialog_->StartProgressDialog(nullptr, nullptr, PROGDLG_AUTOTIME, nullptr);
 		}
+	}
 
 	void progress_ui::set_progress(const size_t current, const size_t max) const
+	{
+		if (this->dialog_)
 		{
 			this->dialog_->SetProgress64(current, max);
 		}
+	}
 
 	void progress_ui::set_line(const int line, const std::string& text) const
+	{
+		if (this->dialog_)
 		{
 			this->dialog_->SetLine(line, utils::string::convert(text).data(), false, nullptr);
 		}
+	}
 
 	void progress_ui::set_title(const std::string& title) const
+	{
+		if (this->dialog_)
 		{
 			this->dialog_->SetTitle(utils::string::convert(title).data());
 		}
+	}
 
 	bool progress_ui::is_cancelled() const
+	{
+		if (this->dialog_)
 		{
 			return this->dialog_->HasUserCancelled();
 		}
+
+		return false;
+	}
 }

src/client/updater/progress_ui.hpp

@@ -7,7 +7,7 @@ namespace updater
 	class progress_ui
 	{
 	public:
-		progress_ui();
+		progress_ui(bool allow_failure = true);
 		~progress_ui();
 
 		void show() const;
@@ -18,6 +18,11 @@ namespace updater
 
 		bool is_cancelled() const;
 
+		operator bool() const
+		{
+			return this->dialog_;
+		}
+
 	private:
 		CComPtr<IProgressDialog> dialog_{};
 	};