root/branches/kester/drupal-6/sites/default/modules/node_form_merge/node_form_merge.module @ 421

<?php
/**
 * @file
 * Helper functions for hook_form_alter to merge in node forms content fields.
 */

/**
 * Merge node forms onto a single form.
 *
 * @param array $form 
 *   original form as passed to hook_form_alter.
 * @param array $form_state 
 *   original form_state passed to hook_form_alter.
 * @param object or array $nodes
 *   a variable number nodes to be merged into the form.
 *
 * $node can be the node object retrieved by node_load() if it exists.
 * Otherwise, $node must contain, at least:
 *   type - the node type
 *   uid - the user id
 *   name - the user name
 *   title - the node title
 * as these are needed for saving the new node.
 */
function node_form_merge(&$form, &$form_state) {
  $nodes = func_get_args();
  if (count($nodes) < 3) {
    // no nodes passed just required args
    return;
  }
  else {
    array_shift($nodes);
    array_shift($nodes);
  }

  require_once drupal_get_path('module', 'node') .'/node.pages.inc';

  foreach ($nodes as $node) {
    if (is_array($node)) {
      $node = (object) $node;
    }
    // generate form
    $node_form = drupal_retrieve_form($node->type .'_node_form', $form_state, $node);
    drupal_prepare_form($node->type .'_node_form', $node_form, $form_state);

    // merge fields 
    $form['#field_info'] = array_merge($node_form['#field_info'], $form['#field_info']);
    foreach ($node_form['#field_info'] as $field_name => $info) {
      $form[$field_name] = $node_form[$field_name];
    }
    if (module_exists('fieldgroup') && $groups = fieldgroup_groups($node->type)) {
      foreach ($groups as $group_name => $info) {
        // add fieldsets with all their fields too
        $form[$group_name] = $node_form[$group_name];
      }
    }

    // Node if might be need by some #ahah callbacks
    // merging array keys not already on the #node
    $form['#node'] = array_merge((array) $node_form['#node'], (array)$form['#node']);

    // store the orginal for validation and submission
    $form['#form_merge_data'][$node->type] = $node;

    // finally we do want to process the added fields
    $form['#validate'][] = 'node_form_merge_validate';
  }
}

/**
 * Validates, and submits, the merged node forms.
 */
function node_form_merge_validate($form, &$form_state) {
  // recover embedded form
  foreach ($form['#form_merge_data'] as $type => $node_form) {
    $node = $node_form['#node'];
    // in reverse from before get the field info and put it into the 'form'
    foreach ($node_form['#field_info'] as $field_name => $info) {
      $node_form['values'][$field_name] = $form_state['values'][$field_name];
    }
    // and the fieldsets if there were any
    if (module_exists('fieldgroup') && $groups = fieldgroup_groups($type)) {
      foreach ($groups as $group_name => $group) {
        foreach ($group['fields'] as $field_name => $info) {
          $node_form['values'][$field_name] = $form_state['values'][$field_name];
        }
      } 
    }

    // this is run with op as save as well
    $node_form['values']['op'] = $form_state['values']['op'];
    drupal_execute($type .'_node_form', $node_form, $node);
  }
}