d8-podcast-ror/src/Controller/PodcastRorController.php

<?php
namespace Drupal\podcast_ror\Controller;

use Drupal\Core\Controller\ControllerBase;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Drupal\Core\Template\TwigEnvironment;
use Drupal\node\NodeInterface;

class PodcastRorController extends ControllerBase {
    protected $state;
    protected $twig;
    public function __construct($state, TwigEnvironment $twig) {
        $this->state = $state;
        $this->twig = $twig;
    }

    public static function create(ContainerInterface $container) {
        return new static(
            $container->get('state'),
            $container->get('twig')
        );
    }

    private function query($baseQuery) {
        //TODO: estrai argomento dall'url
        $arg = array('ror_news', 'redazionali', 'news_trasmissioni', 'rassegna_stampa');
        $now = new \Drupal\Core\Datetime\DrupalDateTime('now');
        $now_formatted = $now->format(\Drupal\datetime\Plugin\Field\FieldType\DateTimeItemInterface::DATETIME_STORAGE_FORMAT);
        $query = $baseQuery
            ->condition('status', '1')
            ->condition('type', $arg, 'IN')
            ->condition('field_tx_date', $now_formatted, '<') 
            ->sort('field_tx_date', 'DESC')
            ->range(0, 30);
        // \Drupal::logger('podcast_ror')->info(var_export(\Drupal::request()->query->get('trxid'), true));
        //$trxid = \Drupal::request()->query->get('trxid');
        // TODO: se nell'url c'e' un trx=, allora bisogna
        // aggiungere che  arg=news_trasmissioni
        // fare join con node__field_trasmissione ON // node.nid = node__field_trasmissione.entity_id
        // condition: node__field_trasmissione.field_trasmissione_target_id=$trx
        $nids = $query->execute();
        // TODO: load contenuti_audio referenced entities
        $data = array();
        $nodes_e = \Drupal\node\Entity\Node::loadMultiple($nids);
        $data['nodes'] =  array();
        foreach($nodes_e as $nid => $node) {
            $data['nodes'][$nid] = $node->toArray();
            if( count($data['nodes'][$nid]['body']) > 0 ) {
                $data['nodes'][$nid]['summary'] = htmlspecialchars(substr(
                    html_entity_decode(strip_tags($data['nodes'][$nid]['body'][0]['value'])),
                    0, 3500), ENT_XML1, 'UTF-8');
            } else {
                $data['nodes'][$nid]['summary'] = "";
            }
        }

        $first = true;
        foreach($nodes_e as $nid => $node) {
            $data['nodes'][$nid]['audio'] = array();
            $data['nodes'][$nid]['img'] = array();
            foreach( $node->get('field_contenuti_audio')->referencedEntities() as $ai => $entity)  {
                $data['nodes'][$nid]['audio'][$ai] = $entity->toArray();

                //$data['nodes'][$nid]['audio'][$ai]['text'] =  print_r($data['nodes'][$nid]['audio'][$ai]['field_audio_link'], true);
            }
            if($node->hasField('field_image')) {
                $node_images = $node->get('field_image');
                foreach( $node_images->referencedEntities() as $ai => $entity)  {
                    $arr = $entity->toArray();
                    $data['nodes'][$nid]['img'][] =  array(
                        'uri' => file_create_url($arr['uri'][0]['value']),
                        // 'raw' => $arr,
                    );
                }
            } else { // alcuni content_type non hanno immagine (rassegna stampa)
                $data['nodes'][$nid]['img'][] = [];
            }
            $data['nodes'][$nid]['tx'] = "";
            if($node->getType() == 'news_trasmissioni') {
                $tx = \Drupal\taxonomy\Entity\Term::load(
                    $node->get('field_trasmissione')->target_id
                );
                if($tx !== null) {
                    $data['nodes'][$nid]['tx'] = $tx->getName();
                }
            }
            if($first === true) {
                $first = false;
            }
        }
        return $data;
    }
    public function podcast($query, $title, $description, $link,
        $expected_episodes_per_week
    ) {
        // TODO: add $title argument to the function
        $template = $this->twig->loadTemplate(drupal_get_path('module', 'podcast_ror') . '/templates/podcast.html.twig');
        $query_results = $this->query($query);
        $tmpl_data = [ 'ror' => array('podcast' => $query_results,
            'url' => \Drupal::service('path.current')->getPath(),
            'description' => $description,
            'title' => $title,
            'link' => $link,
            'expected_episodes_per_week' => $expected_episodes_per_week,
        )];
        $headers = array(
            'Content-Type' => 'application/rss+xml',
            'Access-Control-Allow-Origin' => '*',
            'Access-Control-Allow-Methods' => 'GET',
        );
        $nodes = $tmpl_data['ror']['podcast']['nodes'];
        $lastmodtime = 0;
        if( !empty($nodes) )  {
            foreach($nodes as $nid => $node) {
                $modtime = intval($node['changed'][0]['value']);
                if($modtime > $lastmodtime) {
                    $lastmodtime = $modtime;
                }
            }
        }
        $xml = $template->render($tmpl_data);
        $resp = new Response($xml, 200, $headers);
        $resp->setPublic();
        $resp->setTtl(300);
        if($lastmodtime !== 0)  {
            $resp->setLastModified(\DateTime::createFromFormat('U',$lastmodtime));
        }
        return $resp;
    }
    public function podcastAll() {
        $query = \Drupal::entityQuery('node');
        return $this->podcast($query, 'Radio Onda Rossa', 'Tutti gli aggiornamenti, i redazionali, le trasmissioni della radio di chi se la sente',
            'http://www.ondarossa.info/',
            30
        );
    }
    public function podcastByType($contentType) {
        $query = \Drupal::entityQuery('node')
            ->condition('type', $contentType);
        // TODO: get "nice name" for $contentType
        $what = str_replace('+', ', ', $contentType);
        return $this->podcast($query,
            $what . ' (Radio Onda Rossa)',
            $what,
            'http://www.ondarossa.info/',
            30
        );
    }
    public function podcastByTrxID($trxID) {
        $term = \Drupal\taxonomy\Entity\Term::load($trxID);
        $trxName = $term->getName();
        $trxDescriptionHTML = $term->getDescription();
        $trxDescription = strip_tags($trxDescriptionHTML);
        $trxURL = \Drupal\Core\Url::fromRoute('entity.taxonomy_term.canonical',
            ['taxonomy_term' => $trxID],
            ['absolute' => TRUE])->toString();
        $query = \Drupal::entityQuery('node')
            ->condition('type', 'news_trasmissioni')
            ->condition('field_trasmissione', $trxID);
        
        return $this->podcast($query,
            $trxName . ' (Radio Onda Rossa)',
            $trxDescription,
            $trxURL,
            1,
        );
    }
}