youtube_playlist-8.x-1.x-dev/src/Plugin/Block/YoutubePlaylistBlock.php

<?php

namespace Drupal\youtube_playlist\Plugin\Block;

use Drupal\Core\Block\BlockBase;
use Drupal\Core\Form\FormStateInterface;

/**
 * Provides a 'Example: configurable text string' block.
 *
 * Drupal\Core\Block\BlockBase gives us a very useful set of basic functionality
 * for this configurable block. We can just fill in a few of the blanks with
 * defaultConfiguration(), blockForm(), blockSubmit(), and build().
 *
 * @Block(
 *   id = "youtube_playlist",
 *   admin_label = @Translation("Youtube playlist"),
 *   module = "youtube_playlist"
 * )
 */
class YoutubePlaylistBlock extends BlockBase {

  /**
   * {@inheritdoc}
   *
   * This method sets the block default configuration. This configuration
   * determines the block's behavior when a block is initially placed in a
   * region. Default values for the block configuration form should be added to
   * the configuration array. System default configurations are assembled in
   * BlockBase::__construct() e.g. cache setting and block title visibility.
   *
   * @see \Drupal\block\BlockBase::__construct()
   */
  public function defaultConfiguration() {
    return [
      'api_key' => '',
    ];
  }

  /**
   * {@inheritdoc}
   *
   * This method defines form elements for custom block configuration. Standard
   * block configuration fields are added by BlockBase::buildConfigurationForm()
   * (block title and title visibility) and BlockFormController::form() (block
   * visibility settings).
   *
   * @see \Drupal\block\BlockBase::buildConfigurationForm()
   * @see \Drupal\block\BlockFormController::form()
   */
  public function blockForm($form, FormStateInterface $form_state) {
    $form['api_key'] = [
      '#type' => 'textfield',
      '#title' => $this->t('API key'),
      '#description' => $this->t('Youtube data api key'),
      '#default_value' => $this->configuration['api_key'],
      '#required' => TRUE,
    ];
    return $form;
  }

  /**
   * {@inheritdoc}
   *
   * This method processes the blockForm() form fields when the block
   * configuration form is submitted.
   *
   * The blockValidate() method can be used to validate the form submission.
   */
  public function blockSubmit($form, FormStateInterface $form_state) {
    $this->configuration['api_key'] = $form_state->getValue('api_key');
  }

  public function buildApiRequest($method, $uri, $params) {
    $api_key = $this->configuration['api_key'];
    $default_params = ['key' => $api_key];
    $final_params = array_merge($default_params, $params);
    $client = \Drupal::httpClient();
    $resp = $client->request($method, 'https://www.googleapis.com' . $uri, ['query' => $final_params]);
    return [\json_decode($resp->getBody(), TRUE), $resp->getStatusCode()];
  }

  public function YTDurationToSeconds($duration) {
    preg_match('/PT(\d+H)?(\d+M)?(\d+S)?/', $duration, $match);
    $match = array_slice($match, 1);
    $parts = [];
    foreach ($match as $idx => $x) {
      if ($x) {
        $match[$idx] = str_replace('D', '', $x);
      }
    }
    $hours = (int)@$match[0]?(int)$match[0]:0;
    $minutes = (int)@$match[1]?(int)$match[1]:0;
    $seconds = (int)@$match[2]?(int)$match[2]:0;
    $time = [];
    if ($hours > 0) {
      array_push($time, $hours < 10 ? '0' . $hours : $hours);
    }
    array_push($time, $minutes < 10 ? '0' . $minutes : $minutes);
    array_push($time, $seconds < 10 ? '0' . $seconds : $seconds);
    $time = implode(':', $time);
    return $time;
    }

  /**
   * {@inheritdoc}
   */
  public function build() {
    if (!$this->configuration['api_key']) {
      return [
        '#theme' => 'youtube_playlist/youtube_playlist',
        '#video' => [],
        '#playlist' => [],
        '#error' => $this->t('Youtube data api key is not defined.'),
      ];
    }
    $playlistId = '';
    $current_path = \Drupal::service('path.current')->getPath();
    $url = \Drupal::service('path_alias.manager')->getAliasByPath($current_path);
    $playlistIdArr = [];
    $playlistIdArr = \Drupal::database()->query("select playlistId, id from youtube_playlist where urls like '%$url'")->fetchAssoc();
    $playlist_id = $playlistIdArr['playlistId'];
    $videos = [];
    $first_video = [];
    list($data, $status_code) = $this->buildApiRequest(
      'GET',
      '/youtube/v3/playlistItems',
          [
            'maxResults' => '25',
            'part' => 'snippet,contentDetails',
            'playlistId' => str_replace(' ', '', $playlist_id),
          ]);
    if ($status_code != 200) {
      return [
        '#theme' => 'youtube_playlist/youtube_playlist',
        '#video' => [],
        '#playlist' => [],
        '#error' => $this->t('Can not get playlist :playlist_id.', [':playlist_id' => $playlist_id]),
      ];
    }
    if ($data['pageInfo']['totalResults'] === 0) {
      return [
        '#theme' => 'youtube_playlist/youtube_playlist',
        '#video' => [],
        '#playlist' => [],
        '#error' => $this->t('Playlist is empty.'),
      ];
    }
    foreach ($data['items'] as $i => $v) {
      $video_id = $data['items'][$i]['snippet']['resourceId']['videoId'];
      $title = $data['items'][$i]['snippet']['title'];
      $date = \strtotime($data['items'][$i]['snippet']['publishedAt']);
      $date = date('d.m.Y', $date);
      $thumbnail = $data['items'][$i]['snippet']['thumbnails']['medium'];
      $videos[$video_id] = [
        'video_id' => $video_id,
        'title' => $title,
        'date' => $date,
        'thumbnail' => $thumbnail,
        'duration' => 'none',
        'index' => $i
      ];
      list($video_info, $status_code) = $this->buildApiRequest('GET', '/youtube/v3/videos', [
        'part' =>  'snippet,contentDetails,statistics',
        'id' =>  $video_id,
      ]);
      if ($status_code != 200) {
        return [
          '#theme' => 'youtube_playlist/youtube_playlist',
          '#video' => [],
          '#playlist' => [],
          '#error' => $this->t('Can not get video :video_id.', [':video_id' => $video_id]),
        ];
      }
      $duration = $video_info['items'][0]['contentDetails']['duration'];
      $duration = $this->YTDurationToSeconds($duration);
      $videos[$video_info['items'][0]['id']]['duration'] = $duration;
      $video = $videos[$video_info['items'][0]['id']];
      if ($video['index'] == 0) {
        $first_video = $video;
      }
    }
    $player_id = 'y-'.time();

    return [
      '#theme' => 'youtube_playlist',
      '#video' => $first_video,
      '#playlist' => $videos,
      '#player_id' => $player_id,
      '#attached' => [
        'library' => [
          'youtube_playlist/youtube_playlist',
        ],
        'drupalSettings' => [
          'video' => $first_video,
          'videos' => $videos,
          'player_id' => $player_id,
        ],
      ],
      '#cache' => [
        'max-age' => 3600,
      ],
    ];
  }

}