// Nitrogen Compatibility Layer

function unbase64(base64){
  var binary_string = window.atob(base64);
  var len = binary_string.length;
  var bytes = new Uint8Array(len);
  for(var i = 0; i < len; i++) bytes[i] = binary_string.charCodeAt(i);
  return bytes.buffer;
}

function direct(term){
  ws.send(enc(tuple(atom('direct'), term)));
}

function validateSources(){ return true; }

function querySourceRaw(Id){
  var val,
      el = document.getElementById(Id);
  if(!el){
    val = qs('input[name=' + Id + ']:checked');
    val = val ? val.value : "";
  }else switch (el.tagName){
    case 'FIELDSET':
      val = qs('[id="'+Id+'"]:checked'); val = val ? val.value : ""; break;
    case 'INPUT':
      switch(el.getAttribute("type")){
        case 'radio':
          val = qs('input[name=' + Id + ']:checked');
          val = val ? val.value : "";
          break;
        case 'checkbox':
          val = qs('input[id=' + Id + ']:checked');
          val = val ? val.value : "";
          break;
        case 'date':
          val = Date.parse(el.value);
          val = val && new Date(val) || "";
          break;
        case 'calendar':
          val = pickers[el.id]._d || "";
          break;
        case 'comboLookup':
        case 'hidden':
          if(el.hasAttribute('data-bind')){
            val = {'text' : el.value, 'bind' : el.getAttribute('data-bind')};
          }else{
            val = el.value;
          }
          break;
        default:
          var edit = el.contentEditable;
          if(edit && edit === 'true'){
            val = el.innerHTML;
          }else{
            val = el.value;
          }
      }
      break;
    default:
      if(el.getAttribute('data-text-input')){
        val = querySourceRaw(el.children[1].children[0].id);
      }else if(el.getAttribute('data-vector-input')){
        val = querySourceRaw(el.children[1].id);
      }else if(el.getAttribute('data-edit-input')){
        val = querySourceRaw(el.children[0].children[0].children[0].id);
      }else if(el.getAttribute('data-sortable-list')){
        val = getSortableValues('#' + el.id);
      }else if(el.contentEditable === 'true'){
        val = el.innerHTML;
      }else{
        val = el.value;
        switch(val){
          case "true":
            val = new Boolean(true);
            break;
          case "false":
            val = new Boolean(false);
            break;
        }
      }
  }
  return val;
}

function querySourceConvert(qs){
  if(qs && qs.hasOwnProperty('text') && qs.hasOwnProperty('bind')){
    return dec(unbase64(qs.bind));
  }else if(qs instanceof Date){
    return tuple(number(qs.getFullYear()),
                 number(qs.getMonth() + 1),
                 number(qs.getDate()));
  }else if(qs instanceof Boolean){
    return atom(qs.valueOf());
  }else if(qs instanceof Array){
    return list.apply(null, qs.map(querySourceConvert));
  }else{
    return bin(qs);
  }
}

function querySource(Id){
  var qs = querySourceRaw(Id);
  return querySourceConvert(qs);
}