function blockreference_autocomplete_validate in Block reference 7

Same name and namespace in other branches

1. 6 blockreference.module \blockreference_autocomplete_validate()
2. 7.2 blockreference.module \blockreference_autocomplete_validate()

Validation callback for a blockreference autocomplete element.

1 string reference to 'blockreference_autocomplete_validate'

blockreference_field_widget_form in ./blockreference.module

Implements hook_field_widget_form().

File

./blockreference.module, line 425

Defines a field type for referencing a block from a node.

Code

function blockreference_autocomplete_validate($element, &$form_state, $form) {
  $field = field_info_field($element['#field_name']);
  $instance = field_info_instance($element['#entity_type'], $element['#field_name'], $element['#bundle']);
  $current_bid = $element['#default_value'];
  $value = $element['#value'];
  $bid = NULL;
  if (!empty($value)) {

    // Check whether we have an explicit "[bid:n]" input.
    preg_match('/^(?:\\s*|(.*) )?\\[\\s*bid\\s*:\\s*(\\d+)\\s*\\]$/', $value, $matches);
    if (!empty($matches)) {

      // Explicit bid. Check that the 'title' part matches the actual title for
      // the bid.
      list(, $title, $bid) = $matches;
      if (!empty($title)) {
        $result = db_query('SELECT module, delta FROM {block} WHERE bid = :bid', array(
          ':bid' => $bid,
        ));
        $block = $result
          ->fetchObject();
        $info = module_invoke($block->module, 'block_info');
        $real_title = $info[$block->delta]['info'];
        if (trim($title) != trim($real_title)) {
          form_error($element, t('%name: Title mismatch. Please check your selection.', array(
            '%name' => $instance['label'],
          )));
        }
      }
    }
    else {

      // No explicit bid (the submitted value was not populated by autocomplete
      // selection). Get the bid of a referencable block from the entered title.
      $bids = _blockreference_potential_references($field, array(
        $current_bid,
      ), FALSE, $value, TRUE);
      if ($bids) {

        // @todo The best thing would be to present the user with an
        // additional form, allowing the user to choose between valid
        // candidates with the same title. ATM, we pick the first
        // matching candidate...
        $bid = $bids ? key($bids) : 0;
      }
      else {
        form_error($element, t('%name: Found no valid block with that title.', array(
          '%name' => $instance['label'],
        )));
      }
    }
  }

  // Set the element's value as the node id that was extracted from the entered
  // input.
  form_set_value($element, $bid, $form_state);
}