Transformation rule snippet

transform.js

/*globals MySystem rules nodes suggestions*/

// returns uuids for energytypes or 'unidenitfied_type'
var linkTypes = function(node,linkTypes) {
  var links = node.get(linkTypes);
  return links.map( function (link) {
    return link.get('energyType') || 'unidenitfied_type';
  });
};


// does <node> have a transform?
var hasTransform = function (node) {
  var inLinks  = linkTypes(node,'inLinks').toArray();
  var outLinks = linkTypes(node,'outLinks').toArray();
  
  // we must have in and outlinks to transform
  if (inLinks.length  < 1) { return false; }
  if (outLinks.length < 1) { return false; }
  
  // search for an outlink not in inlinks.
  for (var i = outLinks.length - 1; i >= 0; i--) {
    if (inLinks.indexOf(outLinks[i]) < 0) { return true; }
  };
  return false;
};

// 1) "revise your diagram to show how energy is transformed"
// 
if (nodes.filter(hasTransform).length < 1) {
  suggestions.pushObject("We’ve detected a problem with your diagram. Use evidence from Step 1.2 and Step 1.3 and revise your diagram to show how energy is transformed.");
}