<?php

// $Id: content_taxonomy_activeselect.module,v 1.1 2007-02-08 16:08:27 mh86 Exp $

/**
 * @file
 * Defines a widget type for content_taxonomy with activeselects
 **/

/**
 * Implementation of hook_help().
 **/
function content_taxonomy_activeselect_help($section) {
  switch ($section) {
    case 'admin/modules#description':
      return t('Defines a widget type for content_taxonomy with activeselects. <em>Note: Requires content.module.</em>');
  }
}

/**
 * Implementation of hook_widget_info().
 */
function content_taxonomy_activeselect_widget_info() {
  return array(
    'content_taxonomy_activeselect' => array(
      'label' => 'ActiveSelect',
      'field types' => array('content_taxonomy'),
    ),
  );
  return $items;
}

/**
 * Implementation of hook_widget_settings
 */
function content_taxonomy_activeselect_widget_settings($op, $widget) {
  switch ($op) {
    case 'form':
      $form = array();
      
      $options_term = array();
      $options_term[0] = '---';
      foreach (taxonomy_get_vocabularies() as $voc) {
        foreach (taxonomy_get_tree($voc->vid) as $term) {
          $options_term[$voc->name][$term->tid] = $term->name;
        }
      }    
      $form['activeselect'] = array(
        '#type' => 'fieldset',
        '#title' => t('Activeselect'),
        '#collapsible' => TRUE,
        '#description' => t(''),
      );
          
      $form['activeselect']['label_children'] = array(
        '#type' => 'textfield',
        '#title' => t('Label for second bar'),
        '#default_value' => isset($widget['label_children']) ? $widget['label_children'] : '',
        '#size' => 60,
      );
      
      $form['activeselect']['grandchildren'] = array(
        '#title' => t('Third bar'),
        '#type' => 'checkbox',
        '#default_value' => isset($widget['grandchildren']) ? $widget['grandchildren'] : 0,
      );
           
      $form['activeselect']['label_grandchildren'] = array(
        '#type' => 'textfield',
        '#title' => t('Label for third bar'),
        '#default_value' => isset($widget['label_grandchildren']) ? $widget['label_grandchildren'] : '',
        '#size' => 60,
      );
      return $form;

    case 'save':
      return array('grandchildren', 'label_children', 'label_grandchildren');
  }
}

/**
 * Implementation of hook_widget().
 */
function content_taxonomy_activeselect_widget($op, &$node, $field, &$node_field) {
  $vid = $field['vid'];
  $tid = $field['tid'];
  
  switch ($op) {
    case 'prepare form values':
      if (!$node_field) {
        $node_field['default_tid'] = $_POST['edit'][$field['field_name']]['tid'];
        $node_field['default_children'] = $_POST['edit'][$field['field_name']]['children'];
        $node_field['default_grandchildren'] = $_POST['edit'][$field['field_name']]['grandchildren'];
      }
      break;
    
    case 'form':
      $form = array();
      $children = taxonomy_get_children($tid,$vid);
      foreach ($children as $term) {
        $options_terms[$term->tid] = $term->name;
      }
      if (is_array($node_field['default_children'])) {
        $default_children = implode(',', $node_field['default_children']);
      }
      else {
        $default_children = "";
      }
      $form[$field['field_name']] = array('#tree' => TRUE);         
      $form[$field['field_name']]['tid'] = array(
        '#title' => $field['widget']['label'],
        '#type' => 'activeselect',
        '#activeselect_path' => 'content_taxonomy/activeselect',
        '#activeselect_targets' =>  $field['field_name'] .'-children',
        '#activeselect_extra' => 'term,'. FALSE .','. $field['vid'] .','. $field['field_name'] .'-children#'. $default_children,
        '#default_value' => isset($node_field['default_tid']) ? array_values($node_field['default_tid']) : array(),
        '#options' => $options_terms,
        '#required' => $field['required'],
        '#DANGEROUS_SKIP_CHECK' => TRUE,
      );
      
      $form[$field['field_name']]['children'] = array(
        '#title' => $field['widget']['label_children'],
        '#options' => array(),
        '#multiple' => FALSE,
        '#required' => $field['required'],
        '#DANGEROUS_SKIP_CHECK' => TRUE,
      );
      
      if (!$field['widget']['grandchildren']) {
        $form[$field['field_name']]['children']['#type'] = 'select';
      }
      else {
        if (is_array($node_field['default_grandchildren'])) {
          $default_grandchildren = implode(',', $node_field['default_grandchildren']);
        }
        else {
          $default_grandchildren = "";
        }
      
        $form[$field['field_name']]['children']['#type'] = 'activeselect';
        $form[$field['field_name']]['children']['#activeselect_path'] = 'content_taxonomy/activeselect';
        $form[$field['field_name']]['children']['#activeselect_targets'] = $field['field_name']. '-grandchildren';
        $form[$field['field_name']]['children']['#activeselect_extra'] = 'term,'. FALSE .','. $field['vid'] .','. $field['field_name']. '-grandchildren#'. $default_grandchildren;
            
        $form[$field['field_name']]['grandchildren'] = array(
          '#title' => $field['widget']['label_grandchildren'],
          '#type' => 'select',
          '#options' => array(),
          '#required' => $field['required'],
          '#DANGEROUS_SKIP_CHECK' => TRUE,
        );
      }
      return $form;
          
      case 'process form values':       
        if (is_array($node_field['tid'])) {
          foreach ($node_field['tid'] as $tid) {
            $node_field['tids'][] = $tid;
          }
        }
        elseif (isset($node_field['tid'])) {
          $node_field['tids'][] = $node_field['tid'];
        }
        unset($node_field['tid']);
        
        if (is_array($node_field['children'])) {
          foreach ($node_field['children'] as $tid) {
            $node_field['tids'][] = $tid;
          }
        }
        elseif (isset($node_field['children'])) {
          $node_field['tids'][] = $node_field['children'];
        }
        unset($node_field['children']);
        
        if (is_array($node_field['grandchildren'])) {
          foreach ($node_field['grandchildren'] as $tid) {
            $node_field['tids'][] = $tid;
          }
        }
        elseif (isset($node_field['grandchildren'])) {
          $node_field['tids'][] = $node_field['grandchildren'];
        }
        unset($node_field['grandchildren']);
      }
  
}

/**
 * Implementation of hook_menu
 */
function content_taxonomy_activeselect_menu($may_cache) {
  $access = user_access('access content');
  $items = array();
  if (!$may_cache) {
    $items[] = array(
      'path' => 'content_taxonomy/activeselect',
      'callback' => 'content_taxonomy_activeselect',
      'access' => $access,
      'type' => MENU_CALLBACK);
  }
  return $items;
}

/**
 * return depending values (--> ajax) see activeselect
 */
function content_taxonomy_activeselect($source, $targets, $string, $extra = NULL) {
  if (empty($source) || empty($targets) || empty($string)) {
    exit();
  }
  
  $targets = explode(',', $targets);
  
  $extras = explode(',',$extra); 
  $type = $extras[0];
  $multiple = $extras[1];
  $default_vid = $extras[2];
  for ($i=2; $i<count($extras); $i++) {
    foreach ($targets as $target) {
      if (strtok($extras[$i],'#') == $target) {
        $default_tids[$target][] = drupal_substr($extras[$i],drupal_strlen($target)+1);
      }
    }
  }
  
  $output = array();
  
  $array = activeselect_explode_values($string);
  
  foreach ($targets as $target) {
    $options = array();    
    foreach ($array as $id => $value) {
      if ($type == 'voc') {
        $terms = taxonomy_get_tree($id);
        $options[0]['value'] = '< whole vocabulary >';
      }
      else {
        $terms = taxonomy_get_children($id);
        $options[0]['value'] = '---';
      }
      foreach ($terms as $term) {
        $options[$term->tid]['value'] = $term->name;
        if (is_array($default_tids[$target]) && in_array($term->tid,$default_tids[$target])) $options[$term->tid]['selected'] = TRUE;
      }
    }
    $multiple = $multiple;
    
    $output[$target] = array('options' => $options, 'multiple' => $multiple);
  }
  
  activeselect_set_header_nocache();
  
  print drupal_to_js($output);
  exit();
}

/**
 * adding of terms when node is loaded (called by content_taxonomy)
 */
function content_taxonomy_activeselect_field_load($op, &$node, $field, &$node_field, &$additions, $teaser, $page) {
  $default_terms = content_taxonomy_terms_by_field($node->nid, $field['vid'], $field['tid']);
  $additions[$field['field_name']]['default_tid'] = array_keys($default_terms);
  $default_terms = array_values($default_terms);
  
  $children_terms = content_taxonomy_terms_by_field($node->nid, $field['vid'], $default_terms[0]->tid);
  if (is_array($children_terms)) {
    foreach ($children_terms as $term) {
      $additions[$field['field_name']]['tid'][$term->tid] = $term;
    }
    $additions[$field['field_name']]['default_children'] = array();
    $additions[$field['field_name']]['default_children'] = array_keys($children_terms); 
    $children_terms = array_values($children_terms);
    
    if ($field['widget']['grandchildren']) {
      $grandchildren_terms = content_taxonomy_terms_by_field($node->nid, $field['vid'], $children_terms[0]->tid);
      if (is_array($grandchildren_terms)) {
        foreach ($grandchildrenchildren_terms as $term) {
          $additions[$field['field_name']]['tid'][$term->tid] = $term;
        }
        $additions[$field['field_name']]['default_grandchildren'] = array();
        $additions[$field['field_name']]['default_grandchildren'] = array_keys($grandchildren_terms);
      }
    }
  }
}
?>