Club Drupal

<?php

/**

 * @file

 * Form elements and menu callbacks to provide conditional handling in Webform.

 */

/**

 * Form builder; Provide the form for adding conditionals to a webform node.

 */

function webform_conditionals_form($form, &$form_state, $node) {

  form_load_include($form_state, 'inc', 'webform', $name = 'includes/webform.components');

  form_load_include($form_state, 'inc', 'webform', $name = 'includes/webform.conditionals');

  // Add JavaScript settings to the page needed for conditional elements.

  _webform_conditional_expand_value_forms($node);

  if (isset($form_state['values']['conditionals'])) {

    // Remove the "new" conditional that always comes in.

    unset($form_state['values']['conditionals']['new']);

    $conditionals = $form_state['values']['conditionals'];

  }

  else {

    $conditionals = $node->webform['conditionals'];

  }

  // Empty out any conditionals that have no rules or actions.

  foreach ($conditionals as $rgid => &$conditional) {

    webform_delete_empty_subconditionals($conditional);

    if (empty($conditional['rules']) || empty($conditional['actions'])) {

      unset($conditionals[$rgid]);

    }

  }

  // Drop PHP reference.

  unset($conditional);

  // Check the current topological sort order for the conditionals and report

  // any errors, but only for actual form submissions and not for ajax-related

  // form builds, such as adding or removing a condition or conditional group.

  if (empty($form_state['triggering_element']['#ajax'])) {

    $node->webform['conditionals'] = $conditionals;

    webform_get_conditional_sorter($node)->reportErrors($conditionals);

  }

  $form['#tree'] = TRUE;

  $form['#node'] = $node;

  $form['#attached']['library'][] = array('webform', 'admin');

  $form['#attached']['css'][] = drupal_get_path('module', 'webform') . '/css/webform.css';

  // Wrappers used for AJAX addition/removal.

  $form['conditionals']['#theme'] = 'webform_conditional_groups';

  $form['conditionals']['#prefix'] = '<div id="webform-conditionals-ajax">';

  $form['conditionals']['#suffix'] = '</div>';

  // Keep track of the max conditional count to use as the range for weights.

  $form_state['conditional_count'] = isset($form_state['conditional_count']) ? $form_state['conditional_count'] : 1;

  $form_state['conditional_count'] = count($conditionals) > $form_state['conditional_count'] ? count($conditionals) : $form_state['conditional_count'];

  $source_list = webform_component_list($node, 'conditional', 'path', TRUE);

  $target_list = webform_component_list($node, TRUE, 'path', TRUE);

  $components = $node->webform['components'];

  $delta = $form_state['conditional_count'];

  $weight = -$delta - 1;

  $index = 0;

  foreach ($conditionals as $rgid => $conditional_group) {

    $weight = $conditional_group['weight'];

    $form['conditionals'][$rgid] = array(

      '#theme' => 'webform_conditional_group_row',

      '#even_odd' => ++$index % 2 ? 'odd' : 'even',

      '#weight' => $weight,

      'rgid' => array(

        '#type' => 'value',

        '#value' => $rgid,

      ),

      'conditional' => array(

        '#type' => 'webform_conditional',

        '#default_value' => $conditional_group,

        '#nid' => $node->nid,

        '#sources' => $source_list,

        '#actions' => array(

          'show' => t('shown'),

          'require' => t('required'),

          'set' => t('set to'),

        ),

        '#targets' => $target_list,

        '#parents' => array('conditionals', $rgid),

      ),

    );

    foreach ($conditional_group['actions'] as $action) {

      $cid = $action['target'];

      if ($action['action'] == 'require' && !$components[$cid]['required']) {

        drupal_set_message(t('Component %title must be configured as Required for Webform to conditionally change its required status. <a href="!url">Configure %title.</a>',

          array(

            '%title' => $components[$cid]['name'],

            '!url' => url("node/{$node->nid}/webform/components/$cid", array('query' => array('destination' => "node/{$node->nid}/webform/conditionals"))),

          )

          ), 'error');

      }

    }

    $form['conditionals'][$rgid]['weight'] = array(

      '#type' => 'weight',

      '#title' => t('Weight for rule group !rgid', array('!rgid' => $rgid)),

      '#title_display' => 'invisible',

      '#default_value' => $weight,

      '#delta' => $delta,

    );

  }

  $form['conditionals']['new']['#weight'] = $weight + 1;

  $form['conditionals']['new']['weight'] = array(

    '#type' => 'weight',

    '#title' => t('Weight for new rule group'),

    '#title_display' => 'invisible',

    '#default_value' => $weight + 1,

    '#delta' => $delta,

  );

  $form['conditionals']['new']['new'] = array(

    '#type' => 'submit',

    '#value' => t('+'),

    '#submit' => array('webform_conditionals_form_add'),

    '#ajax' => array(

      'progress' => 'none',

      'effect' => 'fade',

      'callback' => 'webform_conditionals_ajax',

    ),

  );

  // Create dummy remove button for form alignment only.

  $form['conditionals']['new']['remove'] = array(

    '#type' => 'submit',

    '#value' => t('-'),

    '#disabled' => TRUE,

  );

  $form['actions'] = array(

    '#type' => 'actions',

    '#tree' => FALSE,

  );

  $form['actions']['submit'] = array(

    '#type' => 'submit',

    '#value' => t('Save conditions'),

    '#validate' => array('webform_conditionals_form_validate'),

    '#submit' => array('webform_conditionals_form_submit'),

  );

  // Estimate if the form is too long for PHP max_input_vars and detect whether

  // a previous submission was truncated. The estimate will be accurate because

  // the form elements for this page are well known. Ajax use of this page will

  // not generate user-visible errors, so a preflight may be the only indication

  // to the user that the page is too long.

  webform_input_vars_check($form, $form_state, 'conditionals', '');

  return $form;

}

/**

 * Submit handler for webform_conditionals_form(). Add an additional choice.

 */

function webform_conditionals_form_add($form, &$form_state) {

  // Build a default new conditional.

  unset($form_state['values']['conditionals']['new']);

  $weight = count($form_state['values']['conditionals']) > 10 ? -count($form_state['values']['conditionals']) : -10;

  foreach ($form_state['values']['conditionals'] as $key => $conditional) {

    $weight = max($weight, $conditional['weight']);

  }

  // Add the conditional to form state and rebuild the form.

  $form_state['values']['conditionals'][] = array(

    'rules' => array(

      array(

        'source_type' => 'component',

        'source' => NULL,

        'operator' => NULL,

        'value' => NULL,

      ),

    ),

    'andor' => 'and',

    'actions' => array(

      array(

        'target_type' => 'component',

        'target' => NULL,

        'invert' => NULL,

        'action' => NULL,

        'argument' => NULL,

      ),

    ),

    'weight' => $weight + 1,

  );

  $form_state['rebuild'] = TRUE;

}

/**

 * Validate handler for webform_conditionals_form().

 *

 * Prohibit the source and target of a conditional rule from being the same.

 */

function webform_conditionals_form_validate($form, &$form_state) {

  // Skip validation unless this is saving the form.

  $button_key = end($form_state['triggering_element']['#array_parents']);

  if ($button_key !== 'submit') {

    return;

  }

  $node = $form['#node'];

  $components = $node->webform['components'];

  $component_options = webform_component_options();

  foreach ($form_state['complete form']['conditionals'] as $conditional_key => $element) {

    if (substr($conditional_key, 0, 1) !== '#' && $conditional_key !== 'new') {

      $conditional = $element['conditional'];

      $targets = array();

      foreach ($conditional['actions'] as $action_key => $action) {

        if (is_numeric($action_key)) {

          $operation = $action['action']['#value'];

          $target_id = $action['target']['#value'];

          if (isset($targets[$target_id][$operation])) {

            form_set_error('conditionals][' . $conditional_key . '][actions][' . $action_key . '][target',

              t('A operation %op cannot be made for a component more than once. (%target).',

              array(

                '%op' => $action['action']['#options'][$operation],

                '%target' => $components[$action['target']['#value']]['name'],

              )));

          }

          $component_type = $node->webform['components'][$action['target']['#value']]['type'];

          if (!webform_conditional_action_able($component_type, $action['action']['#value'])) {

            form_set_error('conditionals][' . $conditional_key . '][actions][' . $action_key . '][action',

              t("A component of type %type can't be %action. (%target)",

              array(

                '%action' => $action['action']['#options'][$action['action']['#value']],

                '%type' => $component_options[$component_type],

                '%target' => $components[$action['target']['#value']]['name'],

              )));

          }

          $targets[$target_id][$operation] = $target_id;

        }

      }

      foreach ($conditional['rules'] as $rule_key => $rule) {

        if (!is_numeric($rule_key)) {

          continue;

        }

        $source_cid = isset($rule['source']['#value']) ? $rule['source']['#value'] : NULL;

        // Validate component rules, but not conditional_start/end rules.

        if ($source_cid && $rule['source_type']['#value'] == 'component' && isset($targets[$source_cid])) {

          form_set_error('conditionals][' . $conditional_key . '][rules][' . $rule_key . '][source',

            t('The subject of the conditional cannot be the same as the component that is changed (%target).',

            array('%target' => $components[$source_cid]['name'])));

        }

        if ($source_cid && $components[$source_cid]['type'] === 'date' && strtotime($rule['value']['#value']) === FALSE) {

          form_set_error('conditionals][' . $conditional_key . '][rules][' . $rule_key . '][value', t('The conditional comparison value must be a valid date.'));

        }

      }

    }

  }

  // Form validation will not rebuild the form, so we need to ensure

  // necessary JavaScript will still exist.

  _webform_conditional_expand_value_forms($node);

}

/**

 * Submit handler for webform_conditionals_form().

 */

function webform_conditionals_form_submit($form, &$form_state) {

  $node = $form['#node'];

  // Remove the new conditional placeholder.

  unset($form_state['values']['conditionals']['new']);

  $node->webform['conditionals'] = $form_state['values']['conditionals'];

  node_save($node);

  drupal_set_message(t('Conditionals for %title saved.', array('%title' => $node->title)));

}

/**

 * AJAX callback to render out adding a new condition.

 */

function webform_conditionals_ajax($form, $form_state) {

  $rgids = element_children($form['conditionals']);

  $new_rgid = max($rgids);

  $form['conditionals'][$new_rgid]['#ajax_added'] = TRUE;

  $commands = array('#type' => 'ajax');

  $commands['#commands'][] = ajax_command_before('.webform-conditional-new-row', drupal_render($form['conditionals'][$new_rgid]));

  $commands['#commands'][] = ajax_command_restripe('#webform-conditionals-table');

  return $commands;

}

/**

 * Theme the $form['conditionals'] of webform_conditionals_form().

 */

function theme_webform_conditional_groups($variables) {

  $element = $variables['element'];

  drupal_add_tabledrag('webform-conditionals-table', 'order', 'sibling', 'webform-conditional-weight');

  drupal_add_js('Drupal.theme.prototype.tableDragChangedMarker = function() { return ""; }', 'inline');

  drupal_add_js('Drupal.theme.prototype.tableDragChangedWarning = function() { return "<span>&nbsp;</span>"; }', 'inline');

  $output = '<table id="webform-conditionals-table"><tbody>';

  $element_children = element_children($element, TRUE);

  $element_count = count($element_children);

  foreach ($element_children as $index => $key) {

    if ($key === 'new') {

      $even_odd = ($index + 1) % 2 ? 'odd' : 'even';

      $element[$key]['weight']['#attributes']['class'] = array('webform-conditional-weight');

      $data = '<div class="webform-conditional-new">';

      if ($element_count === 1) {

        $data .= t('There are no conditional actions on this form.') . ' ';

      }

      $data .= t('Add a new condition:') . ' ' . drupal_render($element[$key]['new']) . drupal_render($element[$key]['remove']);

      $data .= '</div>';

      $output .= '<tr class="webform-conditional-new-row ' . $even_odd . '">';

      $output .= '<td>' . $data . '</td>';

      $output .= '<td>' . drupal_render($element[$key]['weight']) . '</td>';

      $output .= '</tr>';

    }

    else {

      $output .= drupal_render($element[$key]);

    }

  }

  $output .= '</tbody></table>';

  $output .= drupal_render_children($element);

  return $output;

}

/**

 * Theme an individual conditional row of webform_conditionals_form().

 */

function theme_webform_conditional_group_row($variables) {

  $element = $variables['element'];

  $element['weight']['#attributes']['class'] = array('webform-conditional-weight');

  $weight = drupal_render($element['weight']);

  $classes = array('draggable');

  if (!empty($element['#even_odd'])) {

    $classes[] = $element['#even_odd'];

  }

  if (!empty($element['#ajax_added'])) {

    $classes[] = 'ajax-new-content';

  }

  $output = '';

  $output .= '<tr class="' . implode(' ', $classes) . '">';

  $output .= '<td>' . drupal_render_children($element) . '</td>';

  $output .= '<td>' . $weight . '</td>';

  $output .= '</tr>';

  return $output;

}

/**

 * Form API #process function to expand a webform conditional element.

 */

function _webform_conditional_expand($element) {

  $default_operator = 'and';

  $element['#tree'] = TRUE;

  $element['#default_value'] += array(

    'andor' => $default_operator,

  );

  $wrapper_id = drupal_clean_css_identifier(implode('-', $element['#parents'])) . '-ajax';

  $element['#prefix'] = '<div id="' . $wrapper_id . '">';

  $element['#suffix'] = '</div>';

  $element['#wrapper_id'] = $wrapper_id;

  // Note: When rules or actions are added, the new rules are inserted into

  // $form_state['values']. So that FAPI can merge data from the post,

  // $form_state['input'] must be adjusted to. To make this easier, hidden

  // fields are added to the conditional_start and _end rules to ensure that

  // each rule is represented in the POST.

  $level = 0;

  $andor_stack[0] = array(

    'value' => $element['#default_value']['andor'],

    'parents' => array_merge($element['#parents'], array('andor')),

    'rid' => 0,

    'first' => TRUE,

  );

  $last_rid = -1;

  foreach ($element['#default_value']['rules'] as $rid => $conditional) {

    switch ($conditional['source_type']) {

      case 'conditional_start':

        $element['rules'][$rid] = array(

          '#level' => $level,

          'source_type' => array(

            '#type' => 'hidden',

            '#value' => 'conditional_start',

          ),

          // The andor operator is located in the first child, which is

          // guaranteed to exist. Therefore, don't add a 'value' element here.

          'add_subconditional' => _webform_conditional_add_expand($element, $rid, TRUE),

          'add' => _webform_conditional_add_expand($element, $rid, FALSE),

          'remove' => _webform_conditional_remove_expand($element, $rid),

        );

        $andor_stack[++$level] = array(

          'value' => isset($conditional['operator']) ? $conditional['operator'] : $default_operator,

          'parents' => array_merge($element['#parents'], array('rules', $rid, 'operator')),

          'rid' => $rid,

          'first' => TRUE,

        );

        break;

      case 'conditional_end':

        --$level;

        $element['rules'][$rid] = array(

          '#level' => $level,

          'source_type' => array(

            '#type' => 'hidden',

            '#value' => 'conditional_end',

          ),

          'add_subconditional' => _webform_conditional_add_expand($element, $rid, TRUE),

          'add' => _webform_conditional_add_expand($element, $rid, FALSE),

          'remove' => _webform_conditional_remove_expand($element, $rid),

          'andor' => _webform_conditional_andor_expand($andor_stack[$level]),

        );

        // Remove the last nested and/or.

        unset($element['rules'][$last_rid]['andor']);

        break;

      case 'component':

        $element['rules'][$rid] = _webform_conditional_rule_expand($element, $rid, $conditional, $level, $andor_stack[$level]);

        break;

      default:

        drupal_set_message(t('Unexpected conditional rule source type found (rule id @rid). Contact the administrator.', array('@rid' => $rid)), 'error');

    }

    $last_rid = $rid;

  }

  // Remove the last and/or.

  unset($element['rules'][$rid]['andor']);

  foreach ($element['#default_value']['actions'] as $aid => $action) {

    $element['actions'][$aid] = _webform_conditional_action_expand($element, $aid, $action);

  }

  return $element;

}

/**

 * Helper. Generate the and/or select or static text.

 */

function _webform_conditional_andor_expand(&$andor) {

  if ($andor['first']) {

    $andor['first'] = FALSE;

    return array(

      '#type' => 'select',

      '#title' => t('And/or'),

      '#options' => array(

        'and' => t('and'),

        'or' => t('or'),

      ),

      '#parents' => $andor['parents'],

      '#default_value' => $andor['value'],

      '#attributes' => array('data-rid' => $andor['rid']),

    );

  }

  else {

    return array(

      '#type' => 'container',

      '#attributes' => array('class' => array('webform-andor'), 'data-rid' => $andor['rid']),

      'andor_text' => array(

        '#markup' => $andor['value'] == 'or' ? t('or') : t('and'),

      ),

    );

  }

}

/**

 * Helper. Generate the add_subconditional (+) or add + button.

 */

function _webform_conditional_add_expand($element, $rid, $subconditional) {

  return array(

    '#type' => 'submit',

    '#value' => $subconditional ? t('(+)') : t('+'),

    '#submit' => array('webform_conditional_element_add'),

    '#subconditional' => $subconditional,

    '#name' => implode('_', $element['#parents']) . '_rules_' . $rid . ($subconditional ? '_add_subconditional' : '_add'),

    '#attributes' => array('class' => array('webform-conditional-rule-add')),

    '#ajax' => array(

      'progress' => 'none',

      'callback' => 'webform_conditional_element_ajax',

      'wrapper' => $element['#wrapper_id'],

      'event' => 'click',

    ),

  );

}

/**

 * Helper. Generate the add_subconditional (+), add + or remove - button.

 */

function _webform_conditional_remove_expand($element, $rid) {

  return array(

    '#type' => 'submit',

    '#value' => t('-'),

    '#submit' => array('webform_conditional_element_remove'),

    '#name' => implode('_', $element['#parents']) . '_rules_' . $rid . '_remove',

    '#attributes' => array('class' => array('webform-conditional-rule-remove')),

    '#ajax' => array(

      'progress' => 'none',

      'callback' => 'webform_conditional_element_ajax',

      'wrapper' => $element['#wrapper_id'],

      'event' => 'click',

    ),

  );

}

/**

 * Helper. Generate form elements for one rule.

 */

function _webform_conditional_rule_expand($element, $rid, $conditional, $level, &$andor) {

  return array(

    '#level' => $level,

    'source_type' => array(

      '#type' => 'value',

      '#value' => $conditional['source_type'],

    ),

    'source' => array(

      '#type' => 'select',

      '#title' => t('Source'),

      '#options' => $element['#sources'],

      '#default_value' => $conditional['source'],

    ),

    'operator' => array(

      '#type' => 'select',

      '#title' => t('Operator'),

      '#options' => webform_conditional_operators_list(),

      '#default_value' => $conditional['operator'],

    ),

    'value' => array(

      '#type' => 'textfield',

      '#title' => t('Value'),

      '#size' => 20,

      '#default_value' => $conditional['value'],

    ),

    'add_subconditional' => _webform_conditional_add_expand($element, $rid, TRUE),

    'add' => _webform_conditional_add_expand($element, $rid, FALSE),

    'remove' => _webform_conditional_remove_expand($element, $rid),

    'andor' => _webform_conditional_andor_expand($andor),

  );

}

/**

 * Helper. Generate form elements for one action.

 */

function _webform_conditional_action_expand($element, $aid, $action) {

  return array(

    'target_type' => array(

      '#type' => 'value',

      '#value' => $action['target_type'],

    ),

    'target' => array(

      '#type' => 'select',

      '#title' => t('Target'),

      '#options' => $element['#targets'],

      '#default_value' => $action['target'],

    ),

    'invert' => array(

      '#type' => 'select',

      '#title' => t("Is/Isn't"),

      '#options' => array(

        '0' => t('is'),

        '1' => t("isn't"),

      ),

      '#default_value' => $action['invert'],

    ),

    'action' => array(

      '#type' => 'select',

      '#title' => t('Action'),

      '#options' => $element['#actions'],

      '#default_value' => $action['action'],

    ),

    'argument' => array(

      '#type' => 'textfield',

      '#title' => t('Argument'),

      '#size' => 20,

      '#maxlength' => NULL,

      '#default_value' => $action['argument'],

    ),

    'add' => array(

      '#type' => 'submit',

      '#value' => t('+'),

      '#submit' => array('webform_conditional_element_add'),

      '#name' => implode('_', $element['#parents']) . '_actions_' . $aid . '_add',

      '#attributes' => array('class' => array('webform-conditional-action-add')),

      '#ajax' => array(

        'progress' => 'none',

        'callback' => 'webform_conditional_element_ajax',

        'wrapper' => $element['#wrapper_id'],

        'event' => 'click',

      ),

    ),

    'remove' => array(

      '#type' => 'submit',

      '#value' => t('-'),

      '#submit' => array('webform_conditional_element_remove'),

      '#name' => implode('_', $element['#parents']) . '_actions_' . $aid . '_remove',

      '#attributes' => array('class' => array('webform-conditional-action-remove')),

      '#ajax' => array(

        'progress' => 'none',

        'callback' => 'webform_conditional_element_ajax',

        'wrapper' => $element['#wrapper_id'],

        'event' => 'click',

      ),

    ),

  );

}

/**

 * Expand out all the value forms that could potentially be used.

 *

 * These forms are added to the page via JavaScript and swapped in only when

 * needed. Because the user may change the source and operator at any time,

 * all these forms need to be generated ahead of time and swapped in. This

 * could have been done via AJAX, but having all forms available makes for a

 * faster user experience.

 *

 * Added to the JavaScript settings is conditionalValues which contains

 * an array settings suitable for adding to the page via JavaScript. This

 * array contains the following keys:

 *   - operators: An array containing a map of data types, operators, and form

 *     keys. This array is structured as follows:

 * @code

 *   - sources[$source_key] = array(

 *       'data_type' => $data_type,

 *     );

 *     $operators[$data_type][$operator] = array(

 *       'form' => $form_key,

 *     );

 * @endcode

 *   - forms[$form_key]: A string representing an HTML form for an operator.

 *   - forms[$form_key][$source]: Or instead of a single form for all

 *     components, if each component requires its own form, key each component

 *     by its source value (currently always the component ID).

 *

 * @param object $node

 *   The Webform node for which these forms are being generated.

 */

function _webform_conditional_expand_value_forms($node) {

  $operators = webform_conditional_operators();

  $data = array();

  foreach ($operators as $data_type => $operator_info) {

    foreach ($operator_info as $operator => $data_operator_info) {

      $data['operators'][$data_type][$operator]['form'] = 'default';

      if (isset($data_operator_info['form callback'])) {

        $form_callback = $data_operator_info['form callback'];

        $data['operators'][$data_type][$operator]['form'] = $form_callback;

        if ($form_callback !== FALSE && !isset($data['forms'][$form_callback])) {

          $data['forms'][$form_callback] = $form_callback($node);

        }

      }

    }

  }

  foreach ($node->webform['components'] as $cid => $component) {

    if (webform_component_feature($component['type'], 'conditional')) {

      $data['sources'][$cid]['data_type'] = webform_component_property($component['type'], 'conditional_type');

    }

  }

  drupal_add_js(array('webform' => array('conditionalValues' => $data)), 'setting');

}

/**

 * Helper. Find the matching end of a given subconditional.

 *

 * @param array $rules

 *   Array of conditional rules to be searched.

 * @param int $origin_rid

 *   The starting rule id for the search.

 * @param int $target_delta_level

 *   The level that is sought. 0 for current left. -1 for parent.

 *

 * @return int

 *   The rid of the found rule, or -1 if none. Note that NULL is not used as a

 *   semaphore for "not found" because it casts to 0, which is a valid rule id.

 */

function _webform_conditional_find_end(array $rules, $origin_rid, $target_delta_level = 0) {

  $rids = array_keys($rules);

  $offset = array_search($origin_rid, $rids);

  $delta_level = 0;

  foreach (array_slice($rules, $offset, NULL, TRUE) as $rid => $conditional) {

    switch ($conditional['source_type']) {

      case 'conditional_start':

        $delta_level++;

        break;

      case 'conditional_end':

        $delta_level--;

        break;

    }

    if ($delta_level == $target_delta_level) {

      return $rid;

    }

  }

  // Mis-matched conditional_start / _end. Return -1.

  return -1;

}

/**

 * Helper. Find the matching start or end of a given subconditional.

 *

 * @see _webform_conditional_find_end()

 */

function _webform_conditional_find_start($rules, $origin_rid, $target_delta_level = 0) {

  $rids = array_keys($rules);

  $offset = array_search($origin_rid, $rids);

  $delta_level = 0;

  foreach (array_reverse(array_slice($rules, 0, $offset + 1, TRUE), TRUE) as $rid => $conditional) {

    switch ($conditional['source_type']) {

      case 'conditional_end':

        $delta_level++;

        break;

      case 'conditional_start':

        $delta_level--;

        break;

    }

    if ($delta_level == $target_delta_level) {

      return $rid;

    }

  }

  // Mis-matched conditional_start / _end. Return -1.

  return -1;

}

/**

 * Submit handler for webform_conditional elements to add a new rule or action.

 */

function webform_conditional_element_add($form, &$form_state) {

  $button = $form_state['clicked_button'];

  $parents = $button['#parents'];

  array_pop($parents);

  $rid = array_pop($parents);

  // Recurse through the form values until we find the Webform conditional rules

  // or actions. Save the conditional prior to descending to rules/actions.

  $parent_values = &$form_state['values'];

  $input_values = &$form_state['input'];

  foreach ($parents as $key) {

    if (array_key_exists($key, $parent_values)) {

      $conditional = $parent_values;

      $parent_values = &$parent_values[$key];

    }

    if (array_key_exists($key, $input_values)) {

      $input_values = &$input_values[$key];

    }

  }

  // Split the list of rules/actions in this conditional and inject into the

  // right spot.

  $rids = array_keys($parent_values);

  $offset = array_search($rid, $rids);

  $default_rule = isset($button['#subconditional'])

                    ? array(

                      'source' => NULL,

                      'source_type' => 'component',

                      'operator' => NULL,

                      'value' => NULL,

                    )

                    : array(

                      'target_type' => 'component',

                      'target' => NULL,

                      'invert' => NULL,

                      'action' => NULL,

                      'argument' => NULL,

                    );

  if (empty($button['#subconditional'])) {

    $new[0] = (isset($parent_values[$rid]['source_type']) && $parent_values[$rid]['source_type'] == 'component') ? $parent_values[$rid] : $default_rule;

  }

  else {

    // The default andor operator is opposite of current subconditional's

    // operatior.

    $parent_rid = _webform_conditional_find_start($parent_values, $rid, -1);

    $current_op = $parent_rid < 0 ? $conditional['andor'] : $parent_values[$parent_rid]['operator'];

    $current_op = $current_op == 'and' ? 'or' : 'and';

    $new = array(

      array('source_type' => 'conditional_start', 'operator' => $current_op) + $default_rule,

      $default_rule,

      $default_rule,

      array('source_type' => 'conditional_end') + $default_rule,

    );

  }

  // Update both $form_state['values'] and ['input] so that FAPI can merge

  // input values from the POST into the new form.

  $parent_values = array_merge(array_slice($parent_values, 0, $offset + 1), $new, array_slice($parent_values, $offset + 1));

  $input_values = array_merge(array_slice($input_values, 0, $offset + 1), $new, array_slice($input_values, $offset + 1));

  $form_state['rebuild'] = TRUE;

}

/**

 * Submit handler for webform_conditional elements to remove a rule or action.

 */

function webform_conditional_element_remove($form, &$form_state) {

  $button = $form_state['clicked_button'];

  $parents = $button['#parents'];

  $action = array_pop($parents);

  $rid = array_pop($parents);

  // Recurse through the form values until we find the root Webform conditional.

  $parent_values = &$form_state['values'];

  foreach ($parents as $key) {

    if (array_key_exists($key, $parent_values)) {

      $parent_values = &$parent_values[$key];

    }

  }

  switch ($parent_values[$rid]['source_type']) {

    case 'conditional_start':

      unset($parent_values[_webform_conditional_find_end($parent_values, $rid)]);

      break;

    case 'conditional_end':

      unset($parent_values[_webform_conditional_find_start($parent_values, $rid)]);

      break;

  }

  // Remove this rule or action from the list of conditionals.

  unset($parent_values[$rid]);

  $form_state['rebuild'] = TRUE;

}

/**

 * Helper. Delete any subconditionals which contain no rules.

 *

 * @param array $conditional

 *   Conditional array containing the rules.

 *

 * @return array

 *   Array of deleted subconditionals. Empty array if none were deleted.

 */

function webform_delete_empty_subconditionals(array &$conditional) {

  $deleted = array();

  do {

    $empty_deleted = FALSE;

    $open_rid = NULL;

    foreach ($conditional['rules'] as $rid => $rule) {

      switch ($rule['source_type']) {

        case 'conditional_start':

          $open_rid = $rid;

          break;

        case 'conditional_end':

          if ($open_rid) {

            // A conditional_start rule was immediately followed by a

            // conditional_end rule. Delete them both. Repeat the check in case

            // the parent is now empty.

            $deleted[$open_rid] = $open_rid;

            $deleted[$rid] = $rid;

            unset($conditional['rules'][$open_rid], $conditional['rules'][$rid]);

            $open_rid = NULL;

            $empty_deleted = TRUE;

          }

          break;

        default:

          $open_rid = NULL;

      }

    }

  } while ($empty_deleted);

  return $deleted;

}

/**

 * AJAX callback to render out adding a new condition.

 */

function webform_conditional_element_ajax($form, $form_state) {

  $button = $form_state['clicked_button'];

  $parents = $button['#parents'];

  // Trim down the parents to go back up to the level of this elements wrapper.

  // The button name (add/remove).

  array_pop($parents);

  // The rule ID.

  array_pop($parents);

  // The "rules" grouping.

  array_pop($parents);

  $element = $form;

  foreach ($parents as $key) {

    if (!isset($element[$key])) {

      // The entire conditional has been removed.

      return '';

    }

    $element = $element[$key];

  }

  return drupal_render($element['conditional']);

}

/**

 * Theme the form for a conditional action.

 */

function theme_webform_conditional($variables) {

  $element = $variables['element'];

  $output = '';

  $output .= '<div class="webform-conditional">';

  $output .= '<span class="webform-conditional-if">' . t('If') . '</span>';

  foreach (element_children($element['rules']) as $rid) {

    $rule = &$element['rules'][$rid];

    switch ($rule['source_type']['#value']) {

      case 'conditional_start':

        $source_phrase = '<div class="webform-subconditional">' . t('(') . '</div>';

        break;

      case 'conditional_end':

        $source_phrase = '<div class="webform-subconditional">' . t(')') . '</div>';

        break;

      default:

        // Hide labels.

        $rule['source']['#title_display'] = 'invisible';

        $rule['operator']['#title_display'] = 'invisible';

        $rule['value']['#title_display'] = 'invisible';

        $source = '<div class="webform-conditional-source">' . drupal_render($rule['source']) . '</div>';

        $operator = '<div class="webform-conditional-operator">' . drupal_render($rule['operator']) . '</div>';

        $value = '<div class="webform-conditional-value">' . drupal_render($rule['value']) . '</div>';

        $source_phrase = t('!source !operator !value', array(

          '!source' => $source,

          '!operator' => $operator,

          '!value' => $value,

        ));

    }

    $output .= '<div class="webform-conditional-rule">';

    // Can't use theme('indentation') here because it causes the draghandle to

    // be located after the last indentation div.

    $output .= str_repeat('<div class="webform-indentation">&nbsp;</div>', $rule['#level']);

    $output .= drupal_render($rule['source_type']);

    $output .= '<div class="webform-container-inline webform-conditional-condition">';

    $output .= $source_phrase;

    $output .= '</div>';

    if (isset($rule['andor'])) {

      $rule['andor']['#title_display'] = 'invisible';

      $output .= '<div class="webform-conditional-andor webform-container-inline">';

      $output .= drupal_render($rule['andor']);

      $output .= '</div>';

    }

    if (isset($rule['add']) || isset($rule['remove'])) {

      $output .= '<span class="webform-conditional-operations webform-container-inline">';

      $output .= drupal_render($rule['add_subconditional']);

      $output .= drupal_render($rule['add']);

      $output .= drupal_render($rule['remove']);

      $output .= '</span>';

    }

    $output .= '</div>';

  }

  // Hide labels.

  foreach (element_children($element['actions']) as $aid) {

    // Hide labels.

    $element['actions'][$aid]['target']['#title_display'] = 'invisible';

    $element['actions'][$aid]['invert']['#title_display'] = 'invisible';

    $element['actions'][$aid]['action']['#title_display'] = 'invisible';

    $element['actions'][$aid]['argument']['#title_display'] = 'invisible';

    $target = '<div class="webform-conditional-target">' . drupal_render($element['actions'][$aid]['target']) . '</div>';

    $invert = '<div class="webform-conditional-invert">' . drupal_render($element['actions'][$aid]['invert']) . '</div>';

    $action = '<div class="webform-conditional-action">' . drupal_render($element['actions'][$aid]['action']) . '</div>';

    $argument = '<div class="webform-conditional-argument">' . drupal_render($element['actions'][$aid]['argument']) . '</div>';

    $target_phrase = t('then !target !invert !action !argument', array(

      '!target' => $target,

      '!invert' => $invert,

      '!action' => $action,

      '!argument' => $argument,

    ));

    $output .= '<div class="webform-conditional-action">';

    $output .= '<div class="webform-container-inline webform-conditional-condition">';

    $output .= $target_phrase;

    $output .= '</div>';

    if (isset($element['actions'][$aid]['add']) || isset($element['actions'][$aid]['remove'])) {

      $output .= '<span class="webform-conditional-operations webform-container-inline">';

      $output .= drupal_render($element['actions'][$aid]['add']);

      $output .= drupal_render($element['actions'][$aid]['remove']);

      $output .= '</span>';

    }

    $output .= '</div>';

  }

  $output .= '</div>';

  return $output;

}

/**

 * Return a list of all Webform conditional operators.

 */

function webform_conditional_operators() {

  static $operators;

  if (!isset($operators)) {

    $operators = module_invoke_all('webform_conditional_operator_info');

    drupal_alter('webform_conditional_operators', $operators);

  }

  return $operators;

}

/**

 * Return a nested list of all available operators, suitable for a select list.

 */

function webform_conditional_operators_list() {

  $options = array();

  $operators = webform_conditional_operators();

  foreach ($operators as $data_type => $type_operators) {

    $options[$data_type] = array();

    foreach ($type_operators as $operator => $operator_info) {

      $options[$data_type][$operator] = $operator_info['label'];

    }

  }

  return $options;

}

/**

 * Implements hook_webform_conditional_operator_info().

 *

 * Called from webform.module's webform_webform_conditional_operator_info().

 */

function _webform_conditional_operator_info() {

  // General operators:

  $operators['string']['equal'] = array(

    'label' => t('is'),

    'comparison callback' => 'webform_conditional_operator_string_equal',

    'js comparison callback' => 'conditionalOperatorStringEqual',

    // A form callback is not needed here, since we can use the default,

    // non-JavaScript textfield for all text and numeric fields.

    // @code

    // 'form callback' => 'webform_conditional_operator_text',

    // @endcode

  );

  $operators['string']['not_equal'] = array(

    'label' => t('is not'),

    'comparison callback' => 'webform_conditional_operator_string_not_equal',

    'js comparison callback' => 'conditionalOperatorStringNotEqual',

  );

  $operators['string']['contains'] = array(

    'label' => t('contains'),

    'comparison callback' => 'webform_conditional_operator_string_contains',

    'js comparison callback' => 'conditionalOperatorStringContains',

  );

  $operators['string']['does_not_contain'] = array(

    'label' => t('does not contain'),

    'comparison callback' => 'webform_conditional_operator_string_does_not_contain',

    'js comparison callback' => 'conditionalOperatorStringDoesNotContain',

  );

  $operators['string']['begins_with'] = array(

    'label' => t('begins with'),

    'comparison callback' => 'webform_conditional_operator_string_begins_with',

    'js comparison callback' => 'conditionalOperatorStringBeginsWith',

  );

  $operators['string']['ends_with'] = array(

    'label' => t('ends with'),

    'comparison callback' => 'webform_conditional_operator_string_ends_with',

    'js comparison callback' => 'conditionalOperatorStringEndsWith',

  );

  $operators['string']['empty'] = array(

    'label' => t('is blank'),

    'comparison callback' => 'webform_conditional_operator_string_empty',

    'js comparison callback' => 'conditionalOperatorStringEmpty',

    // No value form at all.

    'form callback' => FALSE,

  );

  $operators['string']['not_empty'] = array(

    'label' => t('is not blank'),

    'comparison callback' => 'webform_conditional_operator_string_not_empty',

    'js comparison callback' => 'conditionalOperatorStringNotEmpty',

    // No value form at all.

    'form callback' => FALSE,

  );

  // Numeric operators.

  $operators['numeric']['equal'] = array(

    'label' => t('is equal to'),

    'comparison callback' => 'webform_conditional_operator_numeric_equal',

    'js comparison callback' => 'conditionalOperatorNumericEqual',

  );

  $operators['numeric']['not_equal'] = array(

    'label' => t('is not equal to'),

    'comparison callback' => 'webform_conditional_operator_numeric_not_equal',

    'js comparison callback' => 'conditionalOperatorNumericNotEqual',

  );

  $operators['numeric']['less_than'] = array(

    'label' => t('is less than'),

    'comparison callback' => 'webform_conditional_operator_numeric_less_than',

    'js comparison callback' => 'conditionalOperatorNumericLessThan',

  );

  $operators['numeric']['less_than_equal'] = array(

    'label' => t('is less than or equal'),

    'comparison callback' => 'webform_conditional_operator_numeric_less_than_equal',

    'js comparison callback' => 'conditionalOperatorNumericLessThanEqual',

  );

  $operators['numeric']['greater_than'] = array(

    'label' => t('is greater than'),

    'comparison callback' => 'webform_conditional_operator_numeric_greater_than',

    'js comparison callback' => 'conditionalOperatorNumericGreaterThan',

  );

  $operators['numeric']['greater_than_equal'] = array(

    'label' => t('is greater than or equal'),

    'comparison callback' => 'webform_conditional_operator_numeric_greater_than_equal',

    'js comparison callback' => 'conditionalOperatorNumericGreaterThanEqual',

  );

  $operators['numeric']['empty'] = array(

    'label' => t('is blank'),

    'comparison callback' => 'webform_conditional_operator_string_empty',

    'js comparison callback' => 'conditionalOperatorStringEmpty',

    // No value form at all.

    'form callback' => FALSE,

  );

  $operators['numeric']['not_empty'] = array(

    'label' => t('is not blank'),

    'comparison callback' => 'webform_conditional_operator_string_not_empty',

    'js comparison callback' => 'conditionalOperatorStringNotEmpty',

    // No value form at all.

    'form callback' => FALSE,

  );

  // Select operators.

  $operators['select']['equal'] = array(

    'label' => t('is'),

    'comparison callback' => 'webform_conditional_operator_string_equal',

    'js comparison callback' => 'conditionalOperatorStringEqual',

    'form callback' => 'webform_conditional_form_select',

  );

  $operators['select']['not_equal'] = array(

    'label' => t('is not'),

    'comparison callback' => 'webform_conditional_operator_string_not_equal',

    'js comparison callback' => 'conditionalOperatorStringNotEqual',

    'form callback' => 'webform_conditional_form_select',

  );

  $operators['select']['less_than'] = array(

    'label' => t('is before'),

    'comparison callback' => 'webform_conditional_operator_select_less_than',

    'js comparison callback' => 'conditionalOperatorSelectLessThan',

    'form callback' => 'webform_conditional_form_select',

  );

  $operators['select']['less_than_equal'] = array(

    'label' => t('is or is before'),

    'comparison callback' => 'webform_conditional_operator_select_less_than_equal',

    'js comparison callback' => 'conditionalOperatorSelectLessThanEqual',

    'form callback' => 'webform_conditional_form_select',

  );

  $operators['select']['greater_than'] = array(

    'label' => t('is after'),

    'comparison callback' => 'webform_conditional_operator_select_greater_than',

    'js comparison callback' => 'conditionalOperatorSelectGreaterThan',

    'form callback' => 'webform_conditional_form_select',

  );

  $operators['select']['greater_than_equal'] = array(

    'label' => t('is or is after'),

    'comparison callback' => 'webform_conditional_operator_select_greater_than_equal',

    'js comparison callback' => 'conditionalOperatorSelectGreaterThanEqual',

    'form callback' => 'webform_conditional_form_select',

  );

  $operators['select']['empty'] = array(

    'label' => t('is empty'),

    'comparison callback' => 'webform_conditional_operator_string_empty',

    'js comparison callback' => 'conditionalOperatorStringEmpty',

    // No value form at all.

    'form callback' => FALSE,

  );

  $operators['select']['not_empty'] = array(

    'label' => t('is not empty'),

    'comparison callback' => 'webform_conditional_operator_string_not_empty',

    'js comparison callback' => 'conditionalOperatorStringNotEmpty',

    // No value form at all.

    'form callback' => FALSE,

  );

  // Date operators:

  $operators['date']['equal'] = array(

    'label' => t('is on'),

    'comparison callback' => 'webform_conditional_operator_datetime_equal',

    'comparison prepare js' => 'webform_conditional_prepare_date_js',

    'js comparison callback' => 'conditionalOperatorDateEqual',

    'form callback' => 'webform_conditional_form_date',

  );

  $operators['date']['not_equal'] = array(

    'label' => t('is not on'),

    'comparison callback' => 'webform_conditional_operator_datetime_not_equal',

    'comparison prepare js' => 'webform_conditional_prepare_date_js',

    'js comparison callback' => 'conditionalOperatorDateNotEqual',

    'form callback' => 'webform_conditional_form_date',

  );

  $operators['date']['before'] = array(

    'label' => t('is before'),

    'comparison callback' => 'webform_conditional_operator_datetime_before',

    'comparison prepare js' => 'webform_conditional_prepare_date_js',

    'js comparison callback' => 'conditionalOperatorDateBefore',

    'form callback' => 'webform_conditional_form_date',

  );

  $operators['date']['before_equal'] = array(

    'label' => t('is on or before'),

    'comparison callback' => 'webform_conditional_operator_datetime_before_equal',

    'comparison prepare js' => 'webform_conditional_prepare_date_js',

    'js comparison callback' => 'conditionalOperatorDateBeforeEqual',

    'form callback' => 'webform_conditional_form_date',

  );

  $operators['date']['after'] = array(

    'label' => t('is after'),

    'comparison callback' => 'webform_conditional_operator_datetime_after',

    'comparison prepare js' => 'webform_conditional_prepare_date_js',

    'js comparison callback' => 'conditionalOperatorDateAfter',

    'form callback' => 'webform_conditional_form_date',

  );

  $operators['date']['after_equal'] = array(

    'label' => t('is on or after'),

    'comparison callback' => 'webform_conditional_operator_datetime_after_equal',

    'comparison prepare js' => 'webform_conditional_prepare_date_js',

    'js comparison callback' => 'conditionalOperatorDateAfterEqual',

    'form callback' => 'webform_conditional_form_date',

  );

  // Time operators:

  $operators['time']['equal'] = array(

    'label' => t('is at'),

    'comparison callback' => 'webform_conditional_operator_datetime_equal',

    'comparison prepare js' => 'webform_conditional_prepare_time_js',

    'js comparison callback' => 'conditionalOperatorTimeEqual',

    'form callback' => 'webform_conditional_form_time',

  );

  $operators['time']['not_equal'] = array(

    'label' => t('is not at'),

    'comparison callback' => 'webform_conditional_operator_datetime_not_equal',

    'comparison prepare js' => 'webform_conditional_prepare_time_js',

    'js comparison callback' => 'conditionalOperatorTimeNotEqual',

    'form callback' => 'webform_conditional_form_time',

  );

  $operators['time']['before'] = array(

    'label' => t('is before'),

    'comparison callback' => 'webform_conditional_operator_datetime_before',

    'comparison prepare js' => 'webform_conditional_prepare_time_js',

    'js comparison callback' => 'conditionalOperatorTimeBefore',

    'form callback' => 'webform_conditional_form_time',

  );

  $operators['time']['before_equal'] = array(

    'label' => t('is at or before'),

    'comparison callback' => 'webform_conditional_operator_datetime_before_equal',

    'comparison prepare js' => 'webform_conditional_prepare_time_js',

    'js comparison callback' => 'conditionalOperatorTimeBeforeEqual',

    'form callback' => 'webform_conditional_form_time',

  );

  $operators['time']['after'] = array(

    'label' => t('is after'),

    'comparison callback' => 'webform_conditional_operator_datetime_after',

    'comparison prepare js' => 'webform_conditional_prepare_time_js',

    'js comparison callback' => 'conditionalOperatorTimeAfter',

    'form callback' => 'webform_conditional_form_time',

  );

  $operators['time']['after_equal'] = array(

    'label' => t('is at or after'),

    'comparison callback' => 'webform_conditional_operator_datetime_after_equal',

    'comparison prepare js' => 'webform_conditional_prepare_time_js',

    'js comparison callback' => 'conditionalOperatorTimeAfterEqual',

    'form callback' => 'webform_conditional_form_time',

  );

  return $operators;

}

/**

 * Form callback for select-type conditional fields.

 *

 * Unlike other built-in conditional value forms, the form callback for select

 * types provides an array of forms, keyed by the $cid, which is the "source"

 * for the condition.

 */

function webform_conditional_form_select($node) {

  static $count = 0;

  $forms = array();

  webform_component_include('select');

  foreach ($node->webform['components'] as $cid => $component) {

    if (webform_component_property($component['type'], 'conditional_type') == 'select') {

      // @todo: Use a pluggable mechanism for retrieving select list values.

      $options = _webform_select_options($component);

      $element = array(

        '#type' => 'select',

        '#multiple' => FALSE,

        '#size' => NULL,

        '#attributes' => array(),

        '#id' => NULL,

        '#name' => 'webform-conditional-select-' . $cid . '-' . $count,

        '#options' => $options,

        '#parents' => array(),

      );

      $forms[$cid] = drupal_render($element);

    }

  }

  $count++;

  return $forms;

}

/**

 * Form callback for date conditional fields.

 */

function webform_conditional_form_date($node) {

  static $count = 0;

  $element = array(

    '#title' => NULL,

    '#title_display' => 'invisible',

    '#size' => 24,

    '#attributes' => array('placeholder' => t('@format or valid date', array('@format' => webform_date_format('short')))),

    '#type' => 'textfield',

    '#name' => 'webform-conditional-date-' . $count++,

  );

  return drupal_render($element);

}

/**

 * Form callback for time conditional fields.

 */

function webform_conditional_form_time($node) {

  static $count = 0;

  $element = array(

    '#title' => NULL,

    '#title_display' => 'invisible',

    '#size' => 24,

    '#attributes' => array('placeholder' => t('HH:MMam or valid time')),

    '#type' => 'textfield',

    '#name' => 'webform-conditional-time-' . $count++,

  );

  return drupal_render($element);

}

/**

 * Load a conditional setting from the database.

 */

function webform_conditional_load($rgid, $nid) {

  $node = node_load($nid);

  $conditional = isset($node->webform['conditionals'][$rgid]) ? $node->webform['conditionals'][$rgid] : FALSE;

  return $conditional;

}

/**

 * Insert a conditional rule group into the database.

 */

function webform_conditional_insert($conditional) {

  $transaction = db_transaction();

  drupal_write_record('webform_conditional', $conditional);

  foreach ($conditional['rules'] as $rid => $rule) {

    $rule['nid'] = $conditional['nid'];

    $rule['rgid'] = $conditional['rgid'];

    $rule['rid'] = $rid;

    drupal_write_record('webform_conditional_rules', $rule);

  }

  foreach ($conditional['actions'] as $aid => $action) {

    $action['nid'] = $conditional['nid'];

    $action['rgid'] = $conditional['rgid'];

    $action['aid'] = $aid;

    drupal_write_record('webform_conditional_actions', $action);

  }

}

/**

 * Update a conditional setting in the database.

 */

function webform_conditional_update($node, $conditional) {

  $transaction = db_transaction();

  webform_conditional_delete($node, $conditional);

  webform_conditional_insert($conditional);

}

/**

 * Delete a conditional rule group.

 */

function webform_conditional_delete($node, $conditional) {

  $transaction = db_transaction();

  db_delete('webform_conditional')

    ->condition('nid', $node->nid)

    ->condition('rgid', $conditional['rgid'])

    ->execute();

  db_delete('webform_conditional_rules')

    ->condition('nid', $node->nid)

    ->condition('rgid', $conditional['rgid'])

    ->execute();

  db_delete('webform_conditional_actions')

    ->condition('nid', $node->nid)

    ->condition('rgid', $conditional['rgid'])

    ->execute();

}

/**

 * Loop through all the conditional settings and add needed JavaScript settings.

 *

 * We do a bit of optimization for JavaScript before adding to the page as

 * settings. We remove unnecessary data structures and provide a "source map"

 * so that JavaScript can quickly determine if it needs to check rules when a

 * field on the page has been modified.

 *

 * @param object $node

 *   The loaded node object, containing the webform.

 * @param array $submission_data

 *   The cid-indexed array of existing submission values to be included for

 *   sources outside of the current page.

 * @param int $page_num

 *   The number of the page for which javascript settings should be generated.

 *

 * @return array

 *   Array of settings to be send to the browser as javascript settings.

 */

function webform_conditional_prepare_javascript($node, array $submission_data, $page_num) {

  $settings = array(

    'ruleGroups' => array(),

    'sourceMap' => array(),

    'values' => array(),

  );

  $operators = webform_conditional_operators();

  $conditionals = $node->webform['conditionals'];

  $components = $node->webform['components'];

  $topological_order = webform_get_conditional_sorter($node)->getOrder();

  foreach ($topological_order[$page_num] as $conditional_spec) {

    $conditional = $conditionals[$conditional_spec['rgid']];

    $rgid_key = 'rgid_' . $conditional['rgid'];

    // Assemble the main conditional group settings.

    $settings['ruleGroups'][$rgid_key] = array(

      'andor' => $conditional['andor'],

    );

    foreach ($conditional['actions'] as $action) {

      if ($action['target_type'] == 'component') {

        $target_component = $components[$action['target']];

        $target_parents = webform_component_parent_keys($node, $target_component);

        $aid_key = 'aid_' . $action['aid'];

        $action_settings = array(

          'target' => 'webform-component--' . str_replace('_', '-', implode('--', $target_parents)),

          'invert' => (int) $action['invert'],

          'action' => $action['action'],

          'argument' => $components[$action['target']]['type'] == 'markup' ? filter_xss_admin($action['argument']) : $action['argument'],

        );

        $settings['ruleGroups'][$rgid_key]['actions'][$aid_key] = $action_settings;

      }

    }

    // Add on the list of rules to the conditional group.

    foreach ($conditional['rules'] as $rule) {

      $rid_key = 'rid_' . $rule['rid'];

      switch ($rule['source_type']) {

        case 'component':

          $source_component = $components[$rule['source']];

          $source_parents = webform_component_parent_keys($node, $source_component);

          $source_id = 'webform-component--' . str_replace('_', '-', implode('--', $source_parents));

          // If this source has a value set, add that as a setting. NULL or

          // array(NULL) should be sent as an empty array to simplify the

          // jQuery.

          if (isset($submission_data[$source_component['cid']])) {

            $source_value = $submission_data[$source_component['cid']];

            $source_value = is_array($source_value) ? $source_value : array($source_value);

            $settings['values'][$source_id] = $source_value === array(NULL) ? array() : $source_value;

          }

          $conditional_type = webform_component_property($source_component['type'], 'conditional_type');

          $operator_info = $operators[$conditional_type][$rule['operator']];

          $rule_settings = array(

            'source_type' => $rule['source_type'],

            'source' => $source_id,

            'value' => $rule['value'],

            'callback' => $operator_info['js comparison callback'],

          );

          if (isset($operator_info['comparison prepare js'])) {

            $callback = $operator_info['comparison prepare js'];

            $rule_settings['value'] = $callback($rule['value']);

          }

          $settings['ruleGroups'][$rgid_key]['rules'][$rid_key] = $rule_settings;

          $settings['sourceMap'][$source_id][$rgid_key] = $rgid_key;

          break;

        case 'conditional_start':

          $settings['ruleGroups'][$rgid_key]['rules'][$rid_key] = array(

            'source_type' => $rule['source_type'],

            'andor' => $rule['operator'],

          );

          break;

        case 'conditional_end':

          $settings['ruleGroups'][$rgid_key]['rules'][$rid_key] = array(

            'source_type' => $rule['source_type'],

          );

          break;

      }

    }

  }

  return $settings;

}

/**

 * Determine whether a component type is capable of a given conditional action.

 */

function webform_conditional_action_able($component_type, $action) {

  switch ($action) {

    case 'show':

      return TRUE;

    case 'require':

      return webform_component_feature($component_type, 'required');

    default:

      return webform_component_feature($component_type, "conditional_action_$action");

  }

}

/**

 * Prepare a conditional value for adding as a JavaScript setting.

 */

function webform_conditional_prepare_date_js($rule_value) {

  // Convert the time/date string to a UTC timestamp for comparison. Note that

  // this means comparisons against immediate times (such as "now") may be

  // slightly stale by the time the comparison executes. Timestamps are in

  // milliseconds, as to match JavaScript's Date.toString() method.

  $date = webform_strtodate('c', $rule_value, 'UTC');

  return webform_strtotime($date);

}

/**

 * Prepare a conditional value for adding as a JavaScript setting.

 */

function webform_conditional_prepare_time_js($rule_value) {

  $date = webform_conditional_prepare_date_js($rule_value);

  $today = webform_strtodate('c', 'today', 'UTC');

  $today = webform_strtotime($today);

  return $date - $today;

}

/**

 * Conditional callback for string comparisons.

 */

function webform_conditional_operator_string_equal($input_values, $rule_value) {

  foreach ($input_values as $value) {

    // Checkbox values come in as 0 integers for unchecked boxes.

    $value = ($value === 0) ? '' : $value;

    if (strcasecmp($value, $rule_value) === 0) {

      return TRUE;

    }

  }

  return FALSE;

}

/**

 * Conditional callback for string comparisons.

 */

function webform_conditional_operator_string_not_equal($input_values, $rule_value) {

  return !webform_conditional_operator_string_equal($input_values, $rule_value);

}

/**

 * Conditional callback for string comparisons.

 */

function webform_conditional_operator_string_contains($input_values, $rule_value) {

  foreach ($input_values as $value) {

    if (stripos($value, $rule_value) !== FALSE) {

      return TRUE;

    }

  }

  return FALSE;

}

/**

 * Conditional callback for string comparisons.

 */

function webform_conditional_operator_string_does_not_contain($input_values, $rule_value) {

  return !webform_conditional_operator_string_contains($input_values, $rule_value);

}