rename-layers.jsx

/**
 * @author fabiantheblind
 * @description rename selected layers with number
 * this happens in comp and project panel
 *
 *
 * @todo catch error if layer as no source
 */
fun();
function fun() {

  app.beginUndoGroup('rename layers');
  var curComp = app.project.activeItem;
  if (!curComp || !(curComp instanceof CompItem)) {
    alert('noComp');
    return;
  }
  var promttxt = 'layer';
  if(curComp.selectedLayers.length < 1) {
    alert('no selection');
    return;
  }
  promttxt = curComp.selectedLayers[0].name;

  var basename = prompt('enter base name will have a number', promttxt);
  if(basename.length < 1) {
    alert('nothing is to short');
    return;
  }

  for(var i = 0; i < curComp.selectedLayers.length; i++) {
    var name = basename + ' ' + String(i + 1);
    var currLayer = curComp.selectedLayers[i];
    try{
      currLayer.source.name = name;
    }catch(error) {
      $.writeln('this layer has no source');
    }
    currLayer.name = name;
  }

  app.endUndoGroup();
}