comment_on_top-2.0.3/comment_on_top_by_likes/comment_on_top_by_likes.module

<?php

  use Drupal\comment\CommentInterface;
  use Drupal\comment_on_top_by_likes\Controller\CommentOnTopByLikesController;

  /**
   * Implements hook_schema().
   * Creating db table comment__stick_on_top_by_likes with nid and sticked_on_top_by_likes columns
   */
  function comment_on_top_by_likes_schema() {
    $schema = [];

    $schema['comment__stick_on_top_by_likes'] = [
      'description' => 'Stores sticked_on_top_by_likes status for each node.',
      'fields' => [
        'nid' => [
          'type' => 'int',
          'not null' => TRUE,
          'description' => 'The node ID.',
        ],
        'type' => [
          'type' => 'varchar',
          'length' => 32,
          'not null' => TRUE,
          'description' => 'The type of the comment.',
        ],
        'sticked_on_top_by_likes' => [
          'type' => 'int',
          'size' => 'tiny',
          'not null' => TRUE,
          'default' => 0,
          'description' => 'Flag for sticking comment on top by likes (0 or 1).',
        ],
      ],
      'primary key' => ['nid'],
    ];

    return $schema;
  }

  /**
   * Implements hook_install().
   * Copy all nids and types from node_field_data and assign 0 to column sticked_on_top_by_likes
   */
  function comment_on_top_by_likes_install() {
    $nodes = \Drupal::database()
      ->select('node_field_data', 'n')
      ->fields('n', ['nid', 'type'])
      ->execute()
      ->fetchAllKeyed();

    // Using comment_on_top_by_likes.node service to assign 0 to column sticked_on_top_by_likes
    $commentOnTopService = \Drupal::service('comment_on_top_by_likes.node');

    foreach ($nodes as $nid => $type) {
      $commentOnTopService->notStickOnTopByLikes($nid, $type);
    }
  }


  /**
   * Implements hook_form_alter().
   * Inserting checkbox Stick on top by likes in node create form
   */
  function comment_on_top_by_likes_form_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) {
    $current_route = \Drupal::routeMatch()->getRouteName();
      $node = \Drupal::routeMatch()->getParameter('node');
    $nid = isset($node) ? $node->id() : 0;

    $commentOnTopService = \Drupal::service('comment_on_top_by_likes.node');

    $chckboxDefaultValue = $commentOnTopService->getStickedOnTopByLikes($nid) !== NULL
      ? $commentOnTopService->getStickedOnTopByLikes($nid) : 0;

    //Selecting content types which have comments
    if (($current_route === 'node.add' || $current_route === 'entity.node.edit_form')
      && array_key_exists('comment', $form)) {
      $form['comment']['widget'][0]['stick_on_top_by_likes'] = [
        '#type' => 'checkbox',
        '#title' => t('Stick on top by likes'),
        '#default_value' => $chckboxDefaultValue,
        '#description' => t('Check this if you want to stick on top most liked comment in this node.'),
      ];
      $form['actions']['submit']['#submit'][] = 'comment_on_top_by_likes_submit';
    }
  }


  /**
   * Form submission handler for stick_on_top_by_likes form element on the node form
   *
   * @see comment_on_top_by_likes_form_alter()
   *
   * @param array $form
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   */
  function comment_on_top_by_likes_submit(array $form, \Drupal\Core\Form\FormStateInterface $form_state) {
    // Get the node ID from the form state.
    $nid = $form_state->getFormObject()->getEntity()->id();
    $type = $form_state->getFormObject()->getEntity()->getType();

    // Get value of the checkbox.
    $stick_on_top_by_likes = $form_state->getValue(['comment', 0, 'stick_on_top_by_likes']);
    $commentOnTopByLikesService = \Drupal::service('comment_on_top_by_likes.node');

    // Check if the record exists in the database.
    $record_exists = $commentOnTopByLikesService->getStickedOnTopByLikes($nid);

    // If record doesn't exist, create a new one.
    if ($record_exists === false) {
      $commentOnTopByLikesService->createStickedOnTopByLikesRecord($nid, $stick_on_top_by_likes, $type);
    } else {
      // If record exists, update it.
      $commentOnTopByLikesService->updateStickOnTopByLikes($nid, $stick_on_top_by_likes);
    }

    // Return default Drupal comment order if stick_on_top_by_likes is not checked
    if ($stick_on_top_by_likes === 0) {
      $commentOnTopService = \Drupal::service('comment_on_top.service');
      return $commentOnTopService->changeAllLastCommentsToNull($nid);
    }
  }


  /**
   * Implements hook_comment_links_alter().
   * Remove stick_on_top and remove_from_top buttons, if stick_on_top_by_likes is checked
   */
  function comment_on_top_by_likes_comment_links_alter(array &$links, CommentInterface $entity, array &$context)
  {
    //Get node nid
    $node = \Drupal::routeMatch()->getParameter('node');
    $nid = isset($node) ? $node->id() : 0;

    $commentOnTopService = \Drupal::service('comment_on_top_by_likes.node');

    // If nid has checked stick_on_top_by_likes, remove those two buttons
    if ($commentOnTopService->getStickedOnTopByLikes($nid) == 1) {
      if (array_key_exists('comment_on_top_add', $links)) {
        unset($links['comment_on_top_add']);
      }
      if (array_key_exists('comment_on_top_remove', $links)) {
        unset($links['comment_on_top_remove']);
      }
    }
  }


  /**
   * Implements hook_preprocess().
   * Invokes stickCommentOnTopByLikes() method fom CommentOnTopByLikesController
   */
  function comment_on_top_by_likes_preprocess(&$variables, $hook)
  {
    $route_match = \Drupal::service('current_route_match')->getRouteName();

    if ($route_match === 'entity.node.canonical' && $hook === 'node') {
      $commentOnTopService = \Drupal::service('comment_on_top_by_likes.node');

      $nid = $variables['node']->id();

      // If nid has checked stick_on_top_by_likes, invoke stickCommentOnTopByLikes() method
      if ($commentOnTopService->getStickedOnTopByLikes($nid) == 1) {
        $controller = \Drupal::classResolver(CommentOnTopByLikesController::class);
        return $controller->stickCommentOnTopByLikes();
      }
    }
  }


  /**
   * Implements hook_help().
   */
  function comment_on_top_by_likes_help($route_name, \Drupal\Core\Routing\RouteMatchInterface $route_match) {
    switch ($route_name) {
      case 'help.page.comment_on_top_by_likes':
        $output = '';

        $output .= '<p>' . t('All explanation is in  <a href="/admin/help/comment_on_top" >Comment on top help</a>') . '</p>';
        return $output;

      default:
    }
  }