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Edit File: webform_validation.module

<?php

/**
 * @file
 * Add validation rules to webforms.
 */

include_once 'webform_validation.validators.inc';
include_once 'webform_validation.rules.inc';

/**
 * Implements hook_menu().
 */
function webform_validation_menu() {
  $items = array();

$items['node/%webform_menu/webform/validation'] = array(
    'title' => 'Form validation',
    'page callback' => 'webform_validation_manage',
    'page arguments' => array(1),
    'access callback' => 'node_access',
    'access arguments' => array('update', 1),
    'file' => 'webform_validation.admin.inc',
    'weight' => 3,
    'type' => MENU_LOCAL_TASK,
  );

$items['node/%webform_menu/webform/validation/add/%'] = array(
    'title' => 'Add validation',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_validation_manage_rule', 1, 'add', 5),
    'access callback' => 'node_access',
    'access arguments' => array('update', 1),
    'file' => 'webform_validation.admin.inc',
    'type' => MENU_CALLBACK,
  );

$items['node/%webform_menu/webform/validation/edit/%/%webform_validation_rule'] = array(
    'title' => 'Edit rule',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_validation_manage_rule', 1, 'edit', 5, 6),
    'access callback' => 'node_access',
    'access arguments' => array('update', 1),
    'file' => 'webform_validation.admin.inc',
    'type' => MENU_CALLBACK,
  );

$items['node/%webform_menu/webform/validation/delete/%webform_validation_rule'] = array(
    'title' => 'Delete rule',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_validation_delete_rule', 5),
    'access callback' => 'node_access',
    'access arguments' => array('update', 1),
    'file' => 'webform_validation.admin.inc',
    'type' => MENU_CALLBACK,
  );

return $items;
}

/**
 * Load a validation rule.
 *
 * @param int $ruleid
 *   The rule ID.
 *
 * @return array|false
 *   The rule or FALSE if no rule exists.
 */
function webform_validation_rule_load($ruleid) {
  $result = db_query("SELECT ruleid, rulename, nid, validator, data, error_message, negate, weight FROM {webform_validation_rule} WHERE ruleid = :ruleid", array(':ruleid' => $ruleid), array('fetch' => PDO::FETCH_ASSOC));
  $rule = $result->fetchAssoc();
  if (!$rule) {
    return FALSE;
  }
  $rule['components'] = webform_validation_get_rule_components($ruleid, $rule['nid']);
  $rule['negate'] = (bool) $rule['negate'];
  return $rule;
}

/**
 * Implements hook_theme().
 */
function webform_validation_theme() {
  return array(
    'webform_validation_manage_add_rule' => array(
      'variables' => array(
        'nid' => NULL,
      ),
    ),
    'webform_validation_manage_overview_form' => array(
      'render element' => 'form',
    ),
  );
}

/**
 * Implements hook_form_BASE_FORM_ID_alter().
 */
function webform_validation_form_webform_client_form_alter(&$form, &$form_state, $form_id) {
  $form['#validate'][] = 'webform_validation_validate';
  if (module_exists('maxlength')) {
    $nid = substr($form_id, strlen('webform_client_form') + 1);
    $rules = webform_validation_get_node_rules($nid);
    foreach ($rules as $ruleid => $rule) {
      if ($rule['validator'] == 'max_length') {
        $length_limit = $rule['data'];
        $components = $rule['components'];
        foreach ($components as $cid => $component) {
          // Define $form_element as the webform element representing this
          // component, even if it's nested in multiple arrays, as webform
          // elemens often are (e.g., fieldsets). Assign by reference here,
          // since we need to modify the form element itself and don't know
          // its array depth or keys by which to access it.
          $form_element = &_webform_validation_get_webform_element($component, $form);
          // Append to this form element the relevant properties which are
          // supported by maxlength module.
          $form_element['#pre_render'][] = 'maxlength_pre_render';
          $form_element['#maxlength'] = $length_limit;
          $form_element['#maxlength_js'] = TRUE;
        }
      }
    }
  }
}

/**
 * Implements hook_i18n_string_info().
 */
function webform_validation_i18n_string_info() {
  $groups = array();
  $groups['webform_validation'] = array(
    'title' => t('Webform Validation'),
    'description' => t('Translatable strings for webform validation translation'),
    // This group doesn't have strings with format.
    'format' => FALSE,
    // This group cannot list all strings.
    'list' => FALSE,
    'refresh callback' => 'webform_validation_i18n_string_refresh',
  );
  return $groups;
}

/**
 * Webform validation handler to validate against the given rules.
 */
function webform_validation_validate($form, &$form_state) {
  $static_error_messages = &drupal_static(__FUNCTION__, array());
  $page_count = 1;
  $nid = $form_state['values']['details']['nid'];
  $node = node_load($nid);
  $values = isset($form_state['values']['submitted']) ? $form_state['values']['submitted'] : NULL;
  $flat_values = _webform_client_form_submit_flatten($node, $values);
  $rules = webform_validation_get_node_rules($nid);
  $sid = empty($form_state['values']['details']['sid']) ? 0 : $form_state['values']['details']['sid'];

// Get number of pages for this webform.
  if (isset($form_state['webform']['page_count'])) {
    $page_count = $form_state['webform']['page_count'];
  }
  elseif (isset($form_state['storage']['page_count'])) {
    $page_count = $form_state['storage']['page_count'];
  }

// Filter out rules that don't apply to this step in the multistep form.
  if ($values && $page_count && $page_count > 1) {
    $validators = webform_validation_get_validators();
    foreach ($rules as $ruleid => $rule) {
      // Skip the rule if it does not have any components on the current page.
      if (!array_intersect_key($flat_values, $rule['components'])) {
        unset($rules[$ruleid]);
      }
      // For validators that require at least 2 components, skip the rule if any
      // of the components are on a page past the current page.
      elseif (isset($validators[$rule['validator']]['min_components']) && $validators[$rule['validator']]['min_components'] > 1) {
        foreach (array_keys($rule['components']) as $cid) {
          if ($node->webform['components'][$cid]['page_num'] > $form_state['webform']['page_num']) {
            unset($rules[$ruleid]);
            break;
          }
        }
      }
    }
  }

if ($rules) {
    // Remove hidden components.
    if (defined('WebformConditionals::componentShown')) {
      // New conditionals system.
      $sorter = webform_get_conditional_sorter($node);
      // If the form was retrieved from the form cache, the conditionals may not
      // have been executed yet.
      if (!$sorter->isExecuted()) {
        $sorter->executeConditionals(array(), 0);
      }
      foreach ($node->webform['components'] as $key => $component) {
        if ($sorter->componentVisibility($component['cid'], $component['page_num']) !== WebformConditionals::componentShown) {
          unset($flat_values[$key]);
        }
      }
    }
    else {
      // Old conditionals system removed in Webform 7.x-4.8.
      // Webform 7.x-3.x does not define WEBFORM_CONDITIONAL_INCLUDE.
      // Define if needed.
      if (!defined('WEBFORM_CONDITIONAL_INCLUDE')) {
        define('WEBFORM_CONDITIONAL_INCLUDE', 1);
      }
      foreach ($node->webform['components'] as $key => $component) {
        // In Webform 7.x-3.x, _webform_client_form_rule_check() returns
        // boolean.
        // Cast to int so that the function behaves as it does in 7.x-4.x.
        if (isset($flat_values[$key]) && (int) _webform_client_form_rule_check($node, $component, 0, $form_state['values']['submitted']) !== WEBFORM_CONDITIONAL_INCLUDE) {
          unset($flat_values[$key]);
        }
      }
    }

foreach ($rules as $rule) {
      // Create a list of components that need validation against this rule
      // (component id => user submitted value).
      $items = array();
      foreach ($rule['components'] as $cid => $component) {
        if (array_key_exists($cid, $flat_values)) {
          $items[$cid] = $flat_values[$cid];
        }
      }
      $rule['sid'] = $sid;
      // Have the submitted values validated.
      $components = webform_validation_prefix_keys($node->webform['components']);
      // Allow translation for all components item names if available.
      if (module_exists('webform_localization')) {
        module_load_include('inc', 'webform_localization', 'includes/webform_localization.i18n');
        foreach ($components as &$component) {
          $dummy_element = array(
            '#title' => '',
          );
          _webform_localization_translate_component($dummy_element, $component);
          if (isset($dummy_element['#title']) && (string) $dummy_element['#title']) {
            $component['name'] = $dummy_element['#title'];
          }
        }
      }

$errors = module_invoke_all("webform_validation_validate", $rule['validator'], webform_validation_prefix_keys($items), $components, $rule);
      if ($errors) {
        $errors = webform_validation_unprefix_keys($errors);
        // Create hook_webform_validation_validate_alter(). Allow other modules
        // to alter error messages.
        $context = array(
          'validator_name' => $rule['validator'],
          'items' => $items,
          'components' => $node->webform['components'],
          'rule' => $rule,
        );
        drupal_alter('webform_validation_validate', $errors, $context);

foreach ($errors as $item_key => $error) {
          // Do not set error message if an identical message has already been
          // set.
          if (in_array($error, $static_error_messages, TRUE)) {
            continue;
          }
          $static_error_messages[] = $error;

// Build the proper form element error key, taking into account
          // hierarchy.
          $error_key = 'submitted][' . webform_validation_parent_tree($item_key, $node->webform['components']) . $node->webform['components'][$item_key]['form_key'];
          if (is_array($error)) {
            foreach ($error as $sub_item_key => $sub_error) {
              form_set_error($error_key . '][' . $sub_item_key, $sub_error);
            }
          }
          else {
            // filter_xss() is run in _webform_validation_i18n_error_message().
            // @ignore security_form_set_error.
            form_set_error($error_key, $error);
          }
        }
      }
    }
  }
}

/**
 * Helper function to get all field keys (including fields in fieldsets).
 *
 * @deprecated in webform_validation:7.x-1.14 and is removed from
 * webform_validation:7.x-2.0. No longer used.
 * @see https://www.drupal.org/project/webform_validation/issues/2841817
 */
function webform_validation_get_field_keys($submitted, $node) {
  static $fields = array();
  foreach (element_children($submitted) as $child) {
    if (is_array($submitted[$child]) && element_children($submitted[$child])) {
      // Only keep searching recursively if it's a fieldset.
      $group_components = _webform_validation_get_group_types();
      if (in_array(_webform_validation_get_component_type($node, $child), $group_components)) {
        webform_validation_get_field_keys($submitted[$child], $node);
      }
      else {
        $fields[$child] = $child;
      }

}
    else {
      $fields[$child] = $child;
    }
  }
  return $fields;
}

/**
 * Recursively add the parents for the element.
 *
 * These are used as the first argument to form_set_error().
 */
function webform_validation_parent_tree($cid, $components) {
  $output = '';
  if ($pid = $components[$cid]['pid']) {
    $output .= webform_validation_parent_tree($pid, $components);
    $output .= $components[$pid]['form_key'] . '][';
  }
  return $output;
}

/**
 * Get array of formkeys for all components that have been assigned to a rule.
 *
 * @deprecated in webform_validation:7.x-1.14 and is removed from
 * webform_validation:7.x-2.0. No longer used.
 * @see https://www.drupal.org/project/webform_validation/issues/2841817
 */
function webform_validation_rule_get_formkeys($rule) {
  $formkeys = array();
  if (isset($rule['components'])) {
    foreach ($rule['components'] as $cid => $component) {
      $formkeys[] = $component['form_key'];
    }
  }
  return $formkeys;
}

/**
 * Prefix numeric array keys to avoid them being reindexed.
 *
 * Reindexing done in module_invoke_all().
 *
 * Opposite of webform_validation_unprefix_keys().
 */
function webform_validation_prefix_keys($arr) {
  $ret = array();
  foreach ($arr as $k => $v) {
    $ret['item_' . $k] = $v;
  }
  return $ret;
}

/**
 * Undo prefixing numeric array keys.
 *
 * Opposite of webform_validation_prefix_keys().
 */
function webform_validation_unprefix_keys($arr) {
  $ret = array();
  foreach ($arr as $k => $v) {
    $new_key = str_replace('item_', '', $k);
    $ret[$new_key] = $v;
  }
  return $ret;
}

/**
 * Theme the 'add rule' list.
 */
function theme_webform_validation_manage_add_rule($variables) {
  $nid = $variables['nid'];
  $output = '';
  $validators = webform_validation_get_validators();

if ($validators) {
    $results = db_query('SELECT DISTINCT type FROM {webform_component} WHERE nid = :nid', array('nid' => $nid));
    $types = array();
    while ($item = $results->fetch()) {
      $types[] = $item->type;
    }

$output = '<h3>' . t('Add a validation rule') . '</h3>';
    $output .= '<dl>';
    foreach ($validators as $validator_key => $validator_info) {
      $validator_types = webform_validation_valid_component_types($validator_key);
      $title = $validator_info['name'];
      if (array_intersect($types, $validator_types)) {
        $url = 'node/' . $nid . '/webform/validation/add/' . $validator_key;
        $title = l($title, $url, array('query' => drupal_get_destination()));
        $component_list_postfix = '';
      }
      else {
        $component_list_postfix = '; ' . t('none present in this form');
      }
      $item = '<dt>' . $title . '</dt>';
      $item .= '<dd>';
      $item .= $validator_info['description'];
      $item .= ' ' . t('Works with: @component_types.', array('@component_types' => implode(', ', $validator_types) . $component_list_postfix)) . '</dd>';
      $output .= $item;
    }
    $output .= '</dl>';
  }
  return $output;
}

/**
 * Implements hook_webform_validation().
 */
function webform_validation_webform_validation($type, $op, $data) {
  if ($type == 'rule' && in_array($op, array('add', 'edit'))) {
    if (module_exists('i18n_string') && isset($data['error_message'])) {
      i18n_string_update('webform_validation:error_message:' . $data['ruleid'] . ':message', $data['error_message']);
    }
  }
}

/**
 * Implements hook_node_insert().
 */
function webform_validation_node_insert($node) {
  if (module_exists('clone') && in_array($node->type, webform_variable_get('webform_node_types'))) {
    webform_validation_node_clone($node);
  }
}

/**
 * Implements hook_node_delete().
 */
function webform_validation_node_delete($node) {
  $rules = webform_validation_get_node_rules($node->nid);
  if ($rules) {
    $transaction = db_transaction();
    foreach (array_keys($rules) as $ruleid) {
      webform_dynamic_delete_rule($ruleid);
    }
  }
}

/**
 * Adds support for node_clone module.
 */
function webform_validation_node_clone($node) {
  if (!in_array($node->type, webform_variable_get('webform_node_types'))) {
    return;
  }
  if (isset($node->clone_from_original_nid)) {
    $original_nid = $node->clone_from_original_nid;
    // Get existing rules for original node.
    $rules = webform_validation_get_node_rules($original_nid);
    if ($rules) {
      foreach ($rules as $orig_ruleid => $rule) {
        unset($rule['ruleid']);
        $rule['action'] = 'add';
        // Attach existing rules to new node.
        $rule['nid'] = $node->nid;
        $rule['rule_components'] = $rule['components'];
        webform_validation_rule_save($rule);
      }
    }
  }
}

/**
 * Save a validation rule.
 *
 * Data comes from the admin form or nodeapi function in case of node clone.
 *
 * @param array $values
 *   An associative array containing:
 *   - action: "add" or "edit".
 *   - ruleid: ID of the rule to edit. Do not set for "add".
 *   - nid: Node ID of the Webform.
 *   - validator: Machine name of the validator used by this validation rule.
 *   - rulename: Human-readable name for this validation rule.
 *   - rule_components: An array in which the keys and the values are the cid's
 *     of the Webform components that this rule applies to.
 *
 * @return int
 *   The $ruleid of the rule added or edited.
 */
function webform_validation_rule_save(array $values) {
  if ($values['action'] === 'add') {
    $primary_keys = array();
  }
  elseif ($values['action'] === 'edit') {
    $primary_keys = array('ruleid');
  }
  else {
    return FALSE;
  }

$transaction = db_transaction();

drupal_write_record('webform_validation_rule', $values, $primary_keys);

// Delete existing component records for this ruleid.
  if ($values['action'] === 'edit') {
    db_delete('webform_validation_rule_components')
      ->condition('ruleid', $values['ruleid'])
      ->execute();
  }

$components = array_filter($values['rule_components']);
  if ($values['ruleid'] && $components) {
    webform_validation_save_rule_components($values['ruleid'], $components);
    module_invoke_all('webform_validation', 'rule', $values['action'], $values);
  }

return $values['ruleid'];
}

/**
 * Save components attached to a specific rule.
 *
 * @param int $ruleid
 *   The ruleid of the rule being saved.
 * @param array $components
 *   An array in which the keys are the cid's of the components attached to the
 *   rule.
 *
 * @return array
 *   An array of the return statuses for each query keyed by cid.
 */
function webform_validation_save_rule_components($ruleid, array $components) {
  $return_status = array();
  foreach ($components as $cid => $component) {
    $return_status[$cid] = db_merge('webform_validation_rule_components')
      ->key(array(
        'ruleid' => $ruleid,
        'cid' => $cid,
      ))
      ->fields(array(
        'ruleid' => $ruleid,
        'cid' => $cid,
      ))
      ->execute();
  }
  return $return_status;
}

/**
 * Given a webform node, get the component type based on a given component key.
 */
function _webform_validation_get_component_type($node, $component_key) {
  if ($node->webform['components']) {
    foreach ($node->webform['components'] as $component) {
      if ($component['form_key'] == $component_key) {
        return $component['type'];
      }
    }
  }
  return FALSE;
}

/**
 * Get all webform components that are defined as a group.
 */
function _webform_validation_get_group_types() {
  $types = array();
  foreach (webform_components() as $name => $component) {
    if (isset($component['features']['group']) && $component['features']['group']) {
      $types[] = $name;
    }
  }
  return $types;
}

/**
 * Implements hook_webform_validator_alter().
 */
function webform_validation_webform_validator_alter(&$validators) {
  // Add support for the Select (or Other) module.
  if (module_exists('select_or_other')) {
    // If this module exists, all select components can now except user input.
    // Thus we provide those components the same rules as a textfield.
    if ($validators) {
      foreach ($validators as $validator_name => $validator_info) {
        if (in_array('textfield', $validator_info['component_types'])) {
          $validators[$validator_name]['component_types'][] = 'select';
        }
        $validators[$validator_name]['component_types'] = array_unique($validators[$validator_name]['component_types']);
      }
    }
  }
}

/**
 * Implements hook_uuid_node_features_export_alter().
 */
function webform_validation_uuid_node_features_export_alter(&$data, $node, $module) {
  $nid = entity_get_id_by_uuid('node', array($node->uuid));
  $nid = reset($nid);
  if (webform_validation_get_node_rules($nid)) {
    $data['dependencies']['webform_validation'] = 'webform_validation';
  }
}

/**
 * Implements hook_uuid_node_features_export_render_alter().
 */
function webform_validation_uuid_node_features_export_render_alter(&$export, $node, $module) {
  if (!empty($node->webform)) {
    $rules = webform_validation_get_node_rules_assoc($node->nid);
    foreach ($rules as &$rule) {
      unset($rule['nid']);
      unset($rule['ruleid']);
    }
    $export->webform['validation'] = $rules;
  }
}

/**
 * Implements hook_entity_uuid_save().
 */
function webform_validation_entity_uuid_save($node, $entity_type) {
  if ($entity_type == 'node') {
    if (isset($node->webform['validation'])) {
      $rules = $node->webform['validation'];
      $orig_rules = webform_validation_get_node_rules_assoc($node->nid);
      $transaction = db_transaction();
      // Delete obsolete rules.
      $delete = array_diff_key($orig_rules, $rules);
      foreach ($delete as $rule) {
        webform_dynamic_delete_rule($rule['ruleid']);
      }
      // Add new rules.
      $new = array_diff_key($rules, $orig_rules);
      foreach ($new as $rule) {
        $rule['action'] = 'add';
        $rule['nid'] = $node->nid;
        $rule['rule_components'] = $rule['components'];
        webform_validation_rule_save($rule);
      }
      // Update existing rules.
      $existing = array_diff_key($rules, $new + $delete);
      foreach ($existing as $name => $rule) {
        $orig_rule = $orig_rules[$name];
        $rule['nid'] = $orig_rule['nid'];
        $rule['ruleid'] = $orig_rule['ruleid'];
        if ($rule != $orig_rule) {
          $rule['action'] = 'edit';
          $rule['rule_components'] = $rule['components'];
          webform_validation_rule_save($rule);
        }
      }
    }
  }
}

/**
 * Get a reference to a specific webform element.
 *
 * (For a given webform_validation rule component, and a given Drupal webform
 * form, get a reference to the webform element represented by the rule
 * component; return the correct element regardless of how deeply it's nested
 * in webform fieldsets or other wrappers.)
 *
 * @param array $component
 *   Webform validation rule component.
 * @param array $form
 *   Drupal webform form.
 *
 * @return array
 *   Reference to the webform element represented by the rule component.
 */
function &_webform_validation_get_webform_element(array $component, array &$form) {
  // Define an array of ancestors, beginning with the component itself.
  $component_ancestors = array($component['form_key']);
  // Define the parent-id, starting with the parent-id of the component itself,
  // if any.
  $pid = $component['pid'];
  // Look into $form['#node']->webform['components'][$pid] to get any parent
  // of the component, and continue working up the family tree until there is
  // no more parent-id.
  while ($pid) {
    $parent = $form['#node']->webform['components'][$pid];
    // Prepend the parent form_key to the array of ancestors. This causes the
    // array of ancestors to be ordered from ancestor to descendant.
    array_unshift($component_ancestors, $parent['form_key']);
    // Note this parent's parent-id, if any.
    $pid = $parent['pid'];
  }
  // $component_ancestors now contains the ordered ancestry. Cycle through it to
  // get the correct member of $form['submitted']. Assign by reference so that
  // we have a good reference to $webform_element to return.
  $webform_element = &$form['submitted'];
  foreach ($component_ancestors as $ancestor) {
    $webform_element = &$webform_element[$ancestor];
  }
  return $webform_element;
}