Lookup.php

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<?php

namespace Rsi\Fred\Controller\Widget;

class Lookup extends Table{

  const CREATOR = 'creator'; //!< Callback function to create a new record (called with value and this widget; returns the new
    // key).
  const OPTIONS = 'options'; //!< Options shortlist. If it is not an assoc.array, the codes from the provider will be used.

  public $creator = null;
  public $options = null;

  protected $_checkOnly = false; //!< Set to true to prevent a creator from executing.

  protected $_downloadFormats = false;

  public function clientConfig(){
    $config = parent::clientConfig();
    if($this->creator) $config[self::CREATOR] = true;
    return $config;
  }

  protected function purgeCreator($value){
    if(!$this->nothing($value) && $this->creator && !$this->_checkOnly && !$this->provider->exists($this->code,$value,$this->params))
      $value = call_user_func($this->creator,$value,$this);
    return $value;
  }

  protected function checkRange($value,$index = null){
    return $this->creator ? true : parent::checkRange($value,$index);
  }

  protected function actionExists(){
    $this->_checkOnly = true;
    $value = $this->convert($this->purge($this->request->value));
    $this->request->result = ['exists' => $exists = $this->checkRange($value,$this->request->index)];
    if($exists && $this->descr) $this->request->result['descr'] = $this->provider->trans($this->descr,$this->key,$value,$this->params);
  }

}