Add convenience function ConfirmIf

It's a very common pattern in the code base to have some code that we want to
run either directly, or with a confirmation, depending on some condition. In
most cases this is solved by creating a local helper function that we call
either directly or from within the HandleConfirm of the confirmation; provide a
convenience helper that makes this easier.

pkg/gui/popup/popup_handler.go

@@ -115,6 +115,20 @@ func (self *PopupHandler) Confirm(opts types.ConfirmOpts) {
 	})
 }
 
+func (self *PopupHandler) ConfirmIf(condition bool, opts types.ConfirmOpts) error {
+	if condition {
+		self.createPopupPanelFn(context.Background(), types.CreatePopupPanelOpts{
+			Title:         opts.Title,
+			Prompt:        opts.Prompt,
+			HandleConfirm: opts.HandleConfirm,
+			HandleClose:   opts.HandleClose,
+		})
+		return nil
+	}
+
+	return opts.HandleConfirm()
+}
+
 func (self *PopupHandler) Prompt(opts types.PromptOpts) {
 	self.createPopupPanelFn(context.Background(), types.CreatePopupPanelOpts{
 		Title:                  opts.Title,

pkg/gui/types/common.go

@@ -126,6 +126,8 @@ type IPopupHandler interface {
 	Alert(title string, message string)
 	// Shows a popup asking the user for confirmation.
 	Confirm(opts ConfirmOpts)
+	// Shows a popup asking the user for confirmation if condition is true; otherwise, the HandleConfirm function is called directly.
+	ConfirmIf(condition bool, opts ConfirmOpts) error
 	// Shows a popup prompting the user for input.
 	Prompt(opts PromptOpts)
 	WithWaitingStatus(message string, f func(gocui.Task) error) error