Sets a property in a list of pages

// a simple script that sets a property for all the pages that match
// a given template in a list of paths

import info.magnolia.context.MgnlContext
import info.magnolia.cms.util.NodeDataUtil

hm = MgnlContext.getSystemContext().getHierarchyManager("website")
count = 0
str = ""
basePaths = ["/path1", "/path2"]


//for each node in given paths
goDeep = { node ->
  
  /* 
   only if the page match a given template.
   Note: in groovy get methods with no arguments can be called
   by omitting the prefix 'get' and the round brackets
   e.g. node.getMetaData() -> node.metaData 
  */
  if ("sometemplate".equals(node.metaData.template))
  {   
    // change the nodeData "propertytochange" to "new"
    NodeDataUtil.getOrCreateAndSet(node, "propertytochange", "new")
    str += "\nSetting property for " + node.handle
  }

  cs = node.getChildren(info.magnolia.cms.core.ItemType.CONTENT)
  cs.each{
    goDeep(it)
  }
}

basePaths.each{
  node = hm.getContent(it)
  goDeep(node)
}

hm.save()

return str + "\n" + count + " pages changed"