library_management_system-1.0.1/src/Plugin/views/field/RequestedBookReturnedDate.php

<?php
namespace Drupal\library_management_system\Plugin\views\field;
use Drupal\Component\Utility\Random;
use Drupal\Core\Form\FormStateInterface;
use Drupal\views\Plugin\views\field\FieldPluginBase;
use Drupal\views\ResultRow;
use Drupal\file\Entity\File;
use Drupal\library_management_system\Entity\LmsPublication;
use Drupal\library_management_system\Entity\LmsBook;
use Drupal\library_management_system\Entity\LmsBookAuthor;
use Drupal\library_management_system\Entity\IssuedLmsBook;
use Drupal\taxonomy\Entity\Term;
use Drupal\Core\Render\Markup;
use \Drupal\Core\Url;

use Drupal\Core\Entity\EntityStorageInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Drupal\Core\Datetime\DateFormatterInterface;

/**
 * A handler to provide a field that is completely custom by the administrator.
 *
 * @ingroup views_field_handlers
 *
 * @ViewsField("requested_book_returned_date")
 */
class RequestedBookReturnedDate extends FieldPluginBase
{

    /**
   * The date formatter service.
   *
   * @var \Drupal\Core\Datetime\DateFormatterInterface
   */
    protected $dateFormatter;

  /**
   * The date format storage.
   *
   * @var \Drupal\Core\Entity\EntityStorageInterface
   */
  protected $dateFormatStorage;

  /**
   * Constructs a new Date object.
   *
   * @param array $configuration
   *   A configuration array containing information about the plugin instance.
   * @param string $plugin_id
   *   The plugin ID for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\Core\Datetime\DateFormatterInterface $date_formatter
   *   The date formatter service.
   * @param \Drupal\Core\Entity\EntityStorageInterface $date_format_storage
   *   The date format storage.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, DateFormatterInterface $date_formatter, EntityStorageInterface $date_format_storage) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);

    $this->dateFormatter = $date_formatter;
    $this->dateFormatStorage = $date_format_storage;
  }



  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static(
      $configuration,
      $plugin_id,
      $plugin_definition,
      $container->get('date.formatter'),
      $container->get('entity_type.manager')->getStorage('date_format')
    );
  }

  /**
   * {@inheritdoc}
   */
  protected function defineOptions() {
    $options = parent::defineOptions();

    $options['date_format'] = ['default' => 'small'];
    $options['custom_date_format'] = ['default' => ''];
    $options['timezone'] = ['default' => ''];

    return $options;
  }

  /**
   * {@inheritdoc}
   */
  public function usesGroupBy()
  {
    return FALSE;
  }
  /**
   * {@inheritdoc}
   */
  public function query()
  {
    // Do nothing -- to override the parent query.
  }

  /**
   * {@inheritdoc}
   */
  public function buildOptionsForm(&$form, FormStateInterface $form_state) {

    $date_formats = [];
    foreach ($this->dateFormatStorage->loadMultiple() as $machine_name => $value) {
      $date_formats[$machine_name] = $this->t('@name format: @date', ['@name' => $value->label(), '@date' => $this->dateFormatter->format(REQUEST_TIME, $machine_name)]);
    }

    $form['date_format'] = [
      '#type' => 'select',
      '#title' => $this->t('Date format'),
      '#options' => $date_formats + [
        'custom' => $this->t('Custom'),
        'raw time ago' => $this->t('Time ago'),
        'time ago' => $this->t('Time ago (with "ago" appended)'),
        'raw time hence' => $this->t('Time hence'),
        'time hence' => $this->t('Time hence (with "hence" appended)'),
        'raw time span' => $this->t('Time span (future dates have "-" prepended)'),
        'inverse time span' => $this->t('Time span (past dates have "-" prepended)'),
        'time span' => $this->t('Time span (with "ago/hence" appended)'),
      ],
      '#default_value' => isset($this->options['date_format']) ? $this->options['date_format'] : 'small',
    ];
    $form['custom_date_format'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Custom date format'),
      '#description' => $this->t('If "Custom", see <a href="https://www.php.net/manual/datetime.format.php#refsect1-datetime.format-parameters" target="_blank">the PHP docs</a> for date formats. Otherwise, enter the number of different time units to display, which defaults to 2.'),
      '#default_value' => isset($this->options['custom_date_format']) ? $this->options['custom_date_format'] : '',
    ];
    // Setup #states for all possible date_formats on the custom_date_format form element.
    foreach (['custom', 'raw time ago', 'time ago', 'raw time hence', 'time hence', 'raw time span', 'time span', 'raw time span', 'inverse time span', 'time span'] as $custom_date_possible) {
      $form['custom_date_format']['#states']['visible'][] = [
        ':input[name="options[date_format]"]' => ['value' => $custom_date_possible],
      ];
    }
    $form['timezone'] = [
      '#type' => 'select',
      '#title' => $this->t('Timezone'),
      '#description' => $this->t('Timezone to be used for date output.'),
      '#options' => ['' => $this->t('- Default site/user timezone -')] + system_time_zones(FALSE, TRUE),
      '#default_value' => $this->options['timezone'],
    ];
    foreach (array_merge(['custom'], array_keys($date_formats)) as $timezone_date_formats) {
      $form['timezone']['#states']['visible'][] = [
        ':input[name="options[date_format]"]' => ['value' => $timezone_date_formats],
      ];
    }

    parent::buildOptionsForm($form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public function render(ResultRow $values)
  {
    $item = $values->_entity;
    $bundle = $item->bundle();
    $returned_date = '';
    $not_returned_message = 'Not returned yet.';
    switch ($bundle) {
      case 'requestedlmsbook':
      if($item) {
        $request_id = $item->id();

        $query = \Drupal::entityQuery('issuedlmsbook')
        ->accessCheck(TRUE)
        ->condition('request_id', $request_id);
        $issuedlmsbook = $query->execute();

        if(!empty($issuedlmsbook)) {
          $issued_bookid = array_key_first($issuedlmsbook);

          $issuedbook = IssuedLmsBook::load($issued_bookid);
          $returned_timestamp = $issuedbook->getReturnedTime();
          $format = $this->options['date_format'];
          if (in_array($format, ['custom', 'raw time ago', 'time ago', 'raw time hence', 'time hence', 'raw time span', 'time span', 'raw time span', 'inverse time span', 'time span'])) {
            $custom_format = $this->options['custom_date_format'];
          }

          if ($returned_timestamp) {
            $timezone = !empty($this->options['timezone']) ? $this->options['timezone'] : NULL;
      // Will be positive for a datetime in the past (ago), and negative for a
      // datetime in the future (hence).
            $time_diff = REQUEST_TIME - $returned_timestamp;
            switch ($format) {
              case 'raw time ago':
              return $this->dateFormatter->formatTimeDiffSince($returned_timestamp, ['granularity' => is_numeric($custom_format) ? $custom_format : 2]);

              case 'time ago':
              return $this->t('%time ago', ['%time' => $this->dateFormatter->formatTimeDiffSince($returned_timestamp, ['granularity' => is_numeric($custom_format) ? $custom_format : 2])]);

              case 'raw time hence':
              return $this->dateFormatter->formatTimeDiffUntil($returned_timestamp, ['granularity' => is_numeric($custom_format) ? $custom_format : 2]);

              case 'time hence':
              return $this->t('%time hence', ['%time' => $this->dateFormatter->formatTimeDiffUntil($returned_timestamp, ['granularity' => is_numeric($custom_format) ? $custom_format : 2])]);

              case 'raw time span':
              return ($time_diff < 0 ? '-' : '') . $this->dateFormatter->formatTimeDiffSince($returned_timestamp, ['strict' => FALSE, 'granularity' => is_numeric($custom_format) ? $custom_format : 2]);

              case 'inverse time span':
              return ($time_diff > 0 ? '-' : '') . $this->dateFormatter->formatTimeDiffSince($returned_timestamp, ['strict' => FALSE, 'granularity' => is_numeric($custom_format) ? $custom_format : 2]);

              case 'time span':
              $time = $this->dateFormatter->formatTimeDiffSince($returned_timestamp, ['strict' => FALSE, 'granularity' => is_numeric($custom_format) ? $custom_format : 2]);
              return ($time_diff < 0) ? $this->t('%time hence', ['%time' => $time]) : $this->t('%time ago', ['%time' => $time]);

              case 'custom':
              if ($custom_format == 'r') {
                return $this->dateFormatter->format($returned_timestamp, $format, $custom_format, $timezone, 'en');
              }
              return $this->dateFormatter->format($returned_timestamp, $format, $custom_format, $timezone);

              default:
              return $this->dateFormatter->format($returned_timestamp, $format, '', $timezone);
            }
          } else {
            return $not_returned_message;
          }
        }
        break;
      }
    }
    return $returned_date;
  }
}