property_list.module

<?php
/**
* @file
* Module for listing properties received from API
*/

use Drupal\property_list\Form\FromToForm;

/**
 * Implements hook_theme().
 */
function property_list_theme()
{
  return [
    'properties_page'    => [
      'variables' => [
        'properties' => []
      ]
    ],
    'property_list' => [
      'variables' => [
        'properties' => [],
        'pager'      => null,
        'empty'      => null
      ]
    ],
    'property_item' => [
      'variables' => [
        'property' => null
      ]
    ]
  ];
}

/**
 * Default template: properties-page.html.twig.
 *
 * @param $variables
 */
function template_preprocess_properties_page(&$variables)
{
  $form = \Drupal::formBuilder()->getForm(FromToForm::class);
  $variables['form'] = $form;

  $properties = [];
  foreach ($variables['properties'] as $property) {
    $properties[] = [
      'property' => [
        '#theme'    => 'property_item',
        '#property' => $property
      ]
    ];
  }

  $variables['property_list'] = [
    '#theme'      => 'property_list',
    '#properties' => $properties,
    '#empty'      => t('We could not find any available properties for these dates')
  ];
}

/**
 * Default template: property-list.html.twig.
 *
 * @param $variables
 */
function template_preprocess_property_list(&$variables)
{
  $from = \Drupal::request()->query->get('from', date('Ymd'));
  $to = \Drupal::request()->query->get('to', date('Ymd', strtotime('last day of december this year')));
  $variables['pager'] = [
    '#type'       => 'pager',
    '#parameters' => [
      'from'      => $from,
      'to'        => $to
    ]
  ];
}