emit document matching properties of an object

gistfile1.txt

// CouchDB document
{
   "_id": "e44f991ff6d04174bb932fcfcb0008aa",
   "_rev": "2-f4f2de9cb942435a9213f0f2cd09d902",
   "user": "user1",
   "key_level1": {
       "abc": {
           "type": "text"
       },
       "bcc": {
           "type": "text"
       }
   }
}

// View to return user and type
function(doc) {
  if (doc.user) {
    for each (var item in doc.key_level1) {
      if (item.type === 'text') {
        emit([doc.user, item.type], doc);
      }
    }
  }
}