groups/modules/commons/commons_polls/commons_polls.module

<?php
/**
 * @file
 * Code for the Commons polls feature.
 */

include_once 'commons_polls.features.inc';

/**
 * Implements hook_commons_entity_integration().
 */
function commons_polls_commons_entity_integration() {
  return array(
    'node' => array(
      'poll' => array(
        'media' => TRUE,
        'is_group_content' => TRUE,
      ),
    ),
  );
}

/**
 * Implements hook_commons_bw_group_widget().
 */
function commons_polls_commons_bw_group_widget() {
  return array(
    'commons_polls' => array(
      'title' => t('Polls'),
      'type' => 'view',
      'vid' => 'commons_bw_polls',
      'display' => 'default',
      'weight' => 10,
      'bundle' => 'poll',
    ),
  );
}

/**
* Implements hook_strongarm_alter().
*/
 function commons_polls_strongarm_alter(&$items) {
  // Expose the poll content type for 'liking' via the Commons_like module
  // by altering the configuration for the Rate.module widget that it provides.
  if (!empty($items['rate_widgets']->value)) {
    foreach($items['rate_widgets']->value as $key => $widget) {
      if ($widget->name == 'commons_like') {
        if (!in_array('poll', $items['rate_widgets']->value[$key]->node_types)) {
          $items['rate_widgets']->value[$key]->node_types[] = 'poll';
        }
        if (!in_array('poll', $items['rate_widgets']->value[$key]->comment_types)) {
          $items['rate_widgets']->value[$key]->comment_types[] = 'poll';
        }
      }
    }
  }
  // Expose the poll content type for integration with Commons Radioactivity
  // and Commons Groups.
  foreach (array('commons_radioactivity_entity_types', 'commons_groups_entity_types') as $key) {
    if (isset($items[$key])) {
      $items[$key]->value['node']['poll'] = 1;
    }
  }
}

/**
 * Implements hook_views_default_views_alter().
 *
 * Display polls on the browsing widget main view.
 */
function commons_polls_views_default_views_alter(&$views) {
  if (!empty($views['commons_bw_all'])) {
    $views['commons_bw_all']->display['default']->display_options['filters']['type']['value']['poll'] = 'poll';
  }
}

/**
 * Implements hook_form_FROM_ID_alter().
 */
function commons_polls_form_commons_bw_partial_node_form_alter(&$form, &$form_state) {
  if (empty($form['#entity']) || $form['#entity']->type != 'poll') {
    return;
  }

  $language = $form['body']['#language'];
  $form['body'][$language][0]['#title_display'] = 'invisible';
  $form['body'][$language][0]['#required'] = TRUE;
  $form['body'][$language][0]['#placeholder'] = t('Enter a question, e.g. "What is your favorite color?"');
  $form['body'][$language][0]['#resizable'] = FALSE;
  $form['body']['#weight'] = -10;

  // Prepare the form for collapsing.
  $form['body']['#attributes']['class'][] = 'trigger-field';
  foreach (array('field_media', 'field_image', 'og_group_ref', 'choice_wrapper', 'actions') as $field) {
    if (isset($form[$field])) {
      $form[$field]['#attributes']['class'][] = 'hideable-field';
    }
  }

  // Add the poll choices widget.
  $form['choice_wrapper'] = array(
    '#tree' => FALSE,
    '#weight' => -4,
    '#prefix' => '<div class="hideable-field clearfix" id="poll-choice-wrapper">',
    '#suffix' => '</div>',
  );

  // Container for just the poll choices.
  $form['choice_wrapper']['choice'] = array(
    '#prefix' => '<div id="poll-choices">',
    '#suffix' => '</div>',
    '#theme' => 'poll_choices',
  );

  for ($delta = 0; $delta < 10; $delta++) {
    $form['choice_wrapper']['choice'][$delta] = _poll_choice_form($delta, NULL, '', 0, $delta);

    if ($delta >= 2) {
      $form['choice_wrapper']['choice'][$delta]['#attributes'] = array('class' => array('hidden'));
    }
  }

  $form['choice_wrapper']['add_choice'] = array(
    '#markup' => '<a href="#" id="add-choice">' . t('Add more choices') . '</a>',
  );

  $form['#attached']['js'] = array(drupal_get_path('module', 'commons_polls') . '/js/commons_polls_partial_form.js');

  $form['actions']['submit']['#value'] = t('Create');

  $form['#pre_render'][] = 'commons_polls_form_commons_bw_partial_node_form_after_build';

  // Submit handler to process the choices.
  array_unshift($form['#submit'], 'commons_polls_form_commons_bw_partial_node_form_submit');
}

/**
 * Submit handler.
 * Set poll settings on the node.
 */
function commons_polls_form_commons_bw_partial_node_form_submit(&$form, &$form_state) {
  $node = $form['#entity'];
  $node->choice = $form_state['values']['choice'];
  $node->runtime = 0;
  $node->active = TRUE;
}

/**
 * After-build call-back.
 * See commons_polls_form_commons_bw_partial_node_form_alter().
 */
function commons_polls_form_commons_bw_partial_node_form_after_build($form) {
  $language = $form['body']['#language'];
  $form['body'][$language][0]['#pre_render'] = array();
  $form['body'][$language][0]['format']['#access'] = FALSE;
  $form['body'][$language][0]['value']['#rows'] = 3;

  return $form;
}

/**
 * Implements hook_views_pre_render().
 */
function commons_polls_views_pre_render(&$view) {
  // Improve the browsing widget empty text when displayed outside of a group.
  // TODO: Enable og_context and check group context instead of looking for an
  // empty first argument.
  if (empty($view->args[0]) && $view->name == 'commons_bw_polls') {
    $view->display_handler->handlers['empty']['area']->options['content'] = t('No polls have been created.');
  }
}