put export template exporting into a separate function

TODO: move this function to another file

src/gui/html_export_window.cpp

@@ -52,12 +52,7 @@ HtmlExportWindow::HtmlExportWindow(Window* parent, const SetP& set, const Export
 	list->select(settings.gameSettingsFor(*set->game).default_export);
 }
 
-void HtmlExportWindow::onOk(wxCommandEvent&) {
-	ExportTemplateP exp = list->getSelection<ExportTemplate>();
-	// get filename
-	String name = wxFileSelector(_TITLE_("save html"),settings.default_export_dir,_(""),_(""),exp->file_type, wxFD_SAVE | wxFD_OVERWRITE_PROMPT);
-	if (name.empty()) return;
-	settings.default_export_dir = wxPathOnly(name);
+ScriptValueP export_set(SetP const& set, vector<CardP> const& cards, ExportTemplateP const& exp, String const& outname) {
 	wxBusyCursor wait;
 	// export info for script
 	ExportInfo info;
@@ -66,7 +61,8 @@ void HtmlExportWindow::onOk(wxCommandEvent&) {
 	WITH_DYNAMIC_ARG(export_info, &info);
 	// create directory?
 	if (exp->create_directory) {
-		wxFileName fn(name);
+		if (outname.empty()) throw Error(_("No output filename specified for export"));
+		wxFileName fn(outname);
 		info.directory_relative = fn.GetName() + _("-files");
 		fn.SetFullName(info.directory_relative);
 		info.directory_absolute = fn.GetFullPath();
@@ -77,17 +73,29 @@ void HtmlExportWindow::onOk(wxCommandEvent&) {
 	// run export script
 	Context& ctx = set->getContext();
 	LocalScope scope(ctx);
-	ctx.setVariable(_("cards"),     to_script(&getSelection()));
+	ctx.setVariable(_("cards"),     to_script(&cards));
 	ctx.setVariable(_("options"),   to_script(&settings.exportOptionsFor(*exp)));
 	ctx.setVariable(_("directory"), to_script(info.directory_relative));
 	ScriptValueP result = exp->script.invoke(ctx);
 	// Save to file
-	wxFileOutputStream file(name);
-	{ // TODO: write as image?
+	if (!outname.empty()) {
+		// TODO: write as image?
 		// write as string
+		wxFileOutputStream file(outname);
 		wxTextOutputStream stream(file);
 		stream.WriteString(*result);
 	}
+	return result;
+}
+
+void HtmlExportWindow::onOk(wxCommandEvent&) {
+	ExportTemplateP exp = list->getSelection<ExportTemplate>();
+	// get filename
+	String name = wxFileSelector(_TITLE_("save html"),settings.default_export_dir,_(""),_(""),exp->file_type, wxFD_SAVE | wxFD_OVERWRITE_PROMPT);
+	if (name.empty()) return;
+	settings.default_export_dir = wxPathOnly(name);
+	// export
+	export_set(set, getSelection(), exp, name);
 	// Done
 	EndModal(wxID_OK);
 }