local function setup(prefs)
 
  return function (metadata)
      local trimmedPath=strutil.upToLastOccurrenceOf(metadata.Pathname,'/') -- Trims lowest folder level.
      local parentFolder=strutil.fromLastOccurrenceOf(metadata.Pathname,'/') -- Gets parent folder's string.
      local grandParentFolder=strutil.fromLastOccurrenceOf(trimmedPath,'/') -- Gets grandparent folder's string.
      local changedMetadata={}
        if prefs.action=='COPY' then
           changedMetadata[prefs.destfield1]=parentFolder
           changedMetadata[prefs.destfield2]=grandParentFolder
        elseif prefs.action=='PREPEND' then
          changedMetadata[prefs.destfield1]=parentFolder..(metadata[prefs.destfield1] or '')
          changedMetadata[prefs.destfield2]=grandParentFolder..(metadata[prefs.destfield2] or '')
        elseif prefs.action=='APPEND' then
          changedMetadata[prefs.destfield1]=(metadata[prefs.destfield1] or '')..parentFolder
          changedMetadata[prefs.destfield2]=(metadata[prefs.destfield2] or '')..grandParentFolder
        end

      return changedMetadata
    
  end
end

function buildUI()
   
    local builder=smbuilder()
    local c=builder:createView('{"text":"COPY MULTILEVEL FOLDER NAME","bounds" : "0,0,parent.width,120"}')
    assert(c,"unable to create view object")
    -- Parent folder's UI
    assert(builder:create('combo',{["id"] = "action",  ["options"] = {"COPY","APPEND","PREPEND"},  ["bounds"]="25,42,150,67",["text"]="COPY"}))
    assert(builder:create('label','{  "bounds":"155,42,280,67","text":"parent folder to", "align" : "left"}'))
    assert(builder:create('combo','{"id" : "destfield1",  "options" : "stringFields",  "bounds":"285,42,415,67","text":"SubCategory"}'))
    -- Grandparent folder's UI
    assert(builder:create('combo',{["id"] = "action",  ["options"] = {"COPY","APPEND","PREPEND"},  ["bounds"]="25,72,150,97",["text"]="COPY"}))
    assert(builder:create('label','{  "bounds":"155,72,330,97","text":"grand parent folder to", "align" : "left"}'))
    assert(builder:create('combo','{"id" : "destfield2",  "options" : "stringFields",  "bounds":"335,72,465,97","text":"Show"}'))
    builder:register(c,setup)
    -- Now inject this
    return c
 
end
--[[ ========================================================== ]]--
return buildUI