Change font family for all text layers in Sketch

Change Font.sketchplugin

// Change font (ctrl a)
var doc = context.document,
	selection = context.selection,
	font_name = [doc askForUserInput:"Font name:" initialValue:"SF UI Display"];

function check_layer(layer){
	log(layer)
	var className = layer.className()
	log("Checking layer " + layer + " of klass: " + className)
	if (className == "MSTextLayer") {
		log("Found text layer!")
		layer.setFontPostscriptName(font_name);
	}
	if (className == "MSArtboardGroup" || className == "MSLayerGroup"){
		var sublayers = [layer layers];
		log("This is a group/artboard/page with " + [sublayers length] + " sublayers")
		for(var i=0; i < [sublayers length]; i++) {
			var sublayer = sublayers.objectAtIndex(i);
			check_layer(sublayer);
		}
	}
}

// Use selection, if any
if(selection && [selection length]){
	for (var i = 0; i < [selection length]; i++) {
		check_layer(selection[i]);
	}
} else {
	// Otherwise, loop trough pages, artboards & layers
	var pages = [doc pages];
	for (var i = 0; i < [pages length]; i++) {
		var current_page = pages[i];
		if ([[current_page artboards] length]) {
			log("Traversing artboards")
			for (var i = 0; i < [[current_page artboards] length]; i++) {
				var artboard = [current_page artboards][i]
				check_layer(artboard)
			}
		} else {
			log("Page has no artboards")
			check_layer(current_page)
		}
	}
}