Drupal MetaData Wrapper Helper

metaDataWrapperHelper.php

<?php
/**
* A simple closure that helps working with node fields
*
* $metadata_wrapper = entity_metadata_wrapper('node', $nid);
* $wrapper = metaDataWrapperHelper( $metadata_wrapper );
* 
* $field_name = $wrapper('field_name', 'text');
*/
function metaDataWrapperHelper($wrapper){

  return function( $field, $type = null ) use($wrapper){

    switch ($type) {

      case 'text':
        $val = $wrapper->{$field}->value();
        return $val;
        break;

      case 'textarea':
        $val = $wrapper->{$field}->value();
        return $val;
        break;

      case 'textarea_formatted':
        $val = $wrapper->{$field}->value();
        return $val['safe_value'];
        break;

      case 'term_ids':
        $val = $wrapper->{$field}->value();
        if( is_array($val) ){
          $arr = array();
          foreach( $val as $obj){
            $arr[] = $obj->tid ;
          }
          return $arr;
        }else if( is_object($val ) ) {
          return array( $val->tid );
        }
        return array();
      break;
      case 'term':
        $val = $wrapper->{$field}->value();
        if( is_object( $val) )
          return $val->name;
        break;

      default:
        # code...
        return $wrapper->{$field}->value();
        break;
    }

  };

}