Markdown link of selection from Safari

/*
  To use:
  * Create a service in Automator
  * Set it to receive text in all applications, and that the result replaces selection.
  * Add a "Run Javascript" action, pasting in this function.
  * Save, restart your editor app.
  * Have a page open in Safari
  * Select some text in your editor, activate your serive from the "Services" menu of the Application menu.
  * For extra speed, assign a keyboard shortcut in the keyboard preference pane.
*/
function run(input, parameters) {
	var Safari = Application('Safari');
	var url = Safari.windows.at(0).currentTab.url();
	return '[' + input + '](' + url + ')';
}