<?php
  /**
  *
  * Sistema Automatizado para la Planificación Estratégico-Situacional en la Administración Pública Venezolana
  * @file ente_planificador_hierarchical_handler_field_ente_childrens.inc
  * Drupal part Module ente_planificador_hierarchical module
  * Copyright 2015 Sistema Automatizado para la Planificación Estratégico-Situacional en la Administración Pública Venezolana (CENDITEL)
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  * 
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  * 
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  *
  * Probado con un servidor Apache 2.0,
  * Postgresql version 7.4.7 y 8.1 mysql 5.0.32 y PHP version 4.3.11 y 5.2.0-8
  *
  * @author Cenditel Merida - Msc. Juan Vizcarrondo
  * @date 2015-02-14 // (a&#241;o-mes-dia)
  * @version 0.2 // (0.1)
  *
  */

/**
 * Field handler to present a hierarchical ente childrens.
 */
class ente_planificador_hierarchical_handler_field_ente_childrens extends views_handler_field {
  function construct() {
    parent::construct();
    $this->additional_fields['nid'] = 'nid';
  }
  function options_form(&$form, &$form_state) {
    parent::options_form($form, $form_state);
    $form['text'] = array(
      '#type' => 'textfield',
      '#title' => t('Text separator'),
      '#default_value' => $this->options['text'],
    );
  }
  function query() {
    $this->ensure_my_table();
    $this->add_additional_fields();
  }

  function render($values) {
    $nid = $values->{$this->aliases['nid']};
    $childrens = _ente_planificador_hierarchical_get_desc($nid, 0);
    $output = ''; 
    if (count($childrens)) {
      $text = !empty($this->options['text']) ? $this->options['text'] : '>';
      $output = '';
      $sep = '';
      foreach($childrens as $level => $ente) {
        $output .= $sep . l($ente['title'], 'node/'. $ente['nid']);
        if ($sep == '') {
          $sep = ' ' . $text . ' ';
        }
      }
      return  $output;
    }
    return;
  }
}