Icon Stamper.sketchplugin

var graphics = getSelection(),
    sourceArtboardSize = 1024,
    percentageX = graphics.frame().x() / sourceArtboardSize,
    percentageY = graphics.frame().y() / sourceArtboardSize;

if (graphics != null) {
  var groupName = graphics.name();
  NSApp.sendAction_to_from('copy:', null, context.document);

  var fastLoop = context.document.artboards().objectEnumerator();

  while (board = fastLoop.nextObject()) {
    var f = board.frame();
    var size = f.width();
    var offset = 100;

    if (size < sourceArtboardSize) {

      // This is a kluge.
      // If you paste layers in a artboard and those layers are larger than
      // the board and large enough to be "over" another artboard, the layers
      // will be pasted to the wrong artboard. I know, weird.
      // Because of that we'll move the artboard a safe distance on the x axis
      // and then move it back to it's original place.
      f.addX(offset);

      board.select_byExpandingSelection(true, false);
      NSApp.sendAction_to_from('paste:', null, context.document);

      var l = board.layers();
      var newGroup = l.objectAtIndex(l.count() - 1);

      newGroup.multiplyBy(board.frame().width() / sourceArtboardSize);
      newGroup.frame().x = size * percentageX;
      newGroup.frame().y = size * percentageY;

      newGroup.setName(groupName);

      // Move the artboard back.
      f.addX(offset);
    }
  }

  // Center the canvas
  context.document.currentView().centerRect(context.selection[0].absoluteRect().rect());
}

function getSelection () {
  var el = null;
  var s = context.selection;

  function selectionError () {
    NSApplication.sharedApplication().displayDialog_withTitle("You'll need to select a group that contains your icon graphics", "Invalid Selection");
  }

  if (s.count() == 0) {
    selectionError();
  }
  else {
    if (s[0].className() == 'MSLayerGroup') {
      el = s[0];
    }
    else {
      selectionError();
    }
  }

  return el;
}