advpoll.module in Advanced Poll 8

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advpoll.module

<?php

use Drupal\Core\Entity\Display\EntityViewDisplayInterface;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Form\FormStateInterface;

/**
 * Implements hook_modules_installed().
 */
function advpoll_modules_installed($modules) {

  // Necessary to do this since it can't be done in config and field config needs to have been installed first.
  // using https://www.drupal.org/docs/8/api/update-api/updating-entities-and-fields-in-drupal-8 example as guide
  $form_display_storage = \Drupal::entityTypeManager()
    ->getStorage('entity_form_display');

  /** @var \Drupal\Core\Entity\Display\EntityFormDisplayInterface $form_display */
  $form_display = $form_display_storage
    ->load('poll.poll.default');
  if (empty($form_display)) {
    $form_display = $form_display_storage
      ->create([
      'targetEntityType' => 'poll',
      'bundle' => 'poll',
      'mode' => 'default',
      'status' => TRUE,
    ]);
  }
  $form_display
    ->setComponent('field_poll_type', [
    'type' => 'options_select',
    'weight' => 1,
    'region' => 'content',
  ]);
  $form_display
    ->save();
  $form_display
    ->setComponent('field_writein', [
    'type' => 'boolean_checkbox',
    'weight' => 2,
    'settings' => [
      'display_label' => TRUE,
    ],
    'region' => 'content',
  ]);
  $form_display
    ->save();
  $form_display
    ->setComponent('field_writein_multiple', [
    'type' => 'boolean_checkbox',
    'weight' => 2,
    'settings' => [
      'display_label' => TRUE,
    ],
    'region' => 'content',
  ]);
  $form_display
    ->save();
  $form_display
    ->setComponent('field_number_of_votes', [
    'type' => 'number',
    'weight' => 3,
    'region' => 'content',
  ]);
  $form_display
    ->save();
  $form_display
    ->setComponent('field_start_date', [
    'type' => 'datetime_default',
    'weight' => 4,
    'region' => 'content',
  ]);
  $form_display
    ->save();
}

/**
 * Implements hook_entity_view().
 */
function advpoll_entity_view(array &$build, EntityInterface $entity, EntityViewDisplayInterface $display, $view_mode) {

  // reset lazy loader in Poll to use our service which will allow specific form output per poll type
  if ($entity
    ->getEntityType()
    ->id() == 'poll') {
    $build['poll'] = array(
      '#lazy_builder' => [
        'advpoll.post_render_cache:renderViewForm',
        [
          'id' => $entity
            ->id(),
          'view_mode' => $view_mode,
          'langcode' => $entity
            ->language()
            ->getId(),
        ],
      ],
      '#create_placeholder' => TRUE,
      '#cache' => [
        'tags' => $entity
          ->getCacheTags(),
      ],
    );
  }
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function advpoll_form_poll_edit_form_alter(&$form, FormStateInterface $form_state) {

  /** @var \Drupal\poll\Entity\Poll $poll */
  $poll = $form_state
    ->getFormObject()
    ->getEntity();

  // Dynamic form for different poll types.
  if (!empty($form['field_poll_type']['widget'])) {

    // State for max number.
    if (!empty($form['field_number_of_votes']['widget'][0]['value'])) {
      $form['field_number_of_votes']['widget'][0]['value']['#states']['invisible'][] = [
        ':input[name="field_poll_type"]' => [
          'value' => '_none',
        ],
      ];
      if (empty($form['field_number_of_votes']['widget'][0]['value']['#default_value'])) {
        $form['field_number_of_votes']['widget'][0]['value']['#default_value'] = 1;
      }
    }

    // Validator and cleaner for hidden elements.
    $form['#validate'][] = 'advpoll_form_poll_edit_form_validate';
  }
}

/**
 * Cleaner for the poll_edit_form.
 */
function advpoll_form_poll_edit_form_validate(&$form, FormStateInterface $form_state) {
  $number_votes = $form_state
    ->getValue('field_number_of_votes');
  if ($number_votes && !empty($number_votes[0]['value'])) {
    $poll_type = $form_state
      ->getValue('field_poll_type');
    if (empty($poll_type)) {

      // For the single poll, set max number to 1.
      $form_state
        ->setValue('field_number_of_votes', [
        [
          'value' => 1,
        ],
      ]);
    }
    else {

      // Otherwise validate maximum.
      $choices = $form_state
        ->getValue('choice');
      if ($choices) {
        unset($choices['add_more']);
        $choices = array_filter($choices, function ($item) {
          return !empty($item['target_id']);
        });
        $choices_count = count($choices);
      }
      else {
        $choices_count = 0;
      }
      if ($number_votes[0]['value'] > $choices_count) {
        $form_state
          ->setErrorByName('field_number_of_votes', t('Max votes should be less than or equal of the choices count.'));
      }
    }
  }
}

/**
 * Implements hook_theme().
 */
function advpoll_theme() {
  return [
    'poll_vote__advanced' => [
      'template' => 'poll-vote--advanced',
      'base hook' => 'poll_vote',
    ],
  ];
}

/**
 * Implements hook_module_implements_alter().
 */
function advpoll_module_implements_alter(&$implementations, $hook) {

  // Disabling cron from the Poll module because it disables all ended polls.
  if ($hook == 'cron') {
    unset($implementations['poll']);
  }
}

Functions

Name	Description
advpoll_entity_view	Implements hook_entity_view().
advpoll_form_poll_edit_form_alter	Implements hook_form_FORM_ID_alter().
advpoll_form_poll_edit_form_validate	Cleaner for the poll_edit_form.
advpoll_modules_installed	Implements hook_modules_installed().
advpoll_module_implements_alter	Implements hook_module_implements_alter().
advpoll_theme	Implements hook_theme().