src/Wallabag/CoreBundle/Event/Subscriber/DownloadImagesSubscriber.php

   1 <?php
   2
   3 namespace Wallabag\CoreBundle\Event\Subscriber;
   4
   5 use Doctrine\Common\EventSubscriber;
   6 use Doctrine\ORM\Event\LifecycleEventArgs;
   7 use Psr\Log\LoggerInterface;
   8 use Wallabag\CoreBundle\Helper\DownloadImages;
   9 use Wallabag\CoreBundle\Entity\Entry;
  10 use Doctrine\ORM\EntityManager;
  11 use Craue\ConfigBundle\Util\Config;
  12
  13 class DownloadImagesSubscriber implements EventSubscriber
  14 {
  15     private $configClass;
  16     private $downloadImages;
  17     private $logger;
  18
  19     /**
  20      * We inject the class instead of the service otherwise it generates a circular reference with the EntityManager.
  21      * So we build the service ourself when we got the EntityManager (in downloadImages).
  22      */
  23     public function __construct(DownloadImages $downloadImages, $configClass, LoggerInterface $logger)
  24     {
  25         $this->downloadImages = $downloadImages;
  26         $this->configClass = $configClass;
  27         $this->logger = $logger;
  28     }
  29
  30     public function getSubscribedEvents()
  31     {
  32         return array(
  33             'prePersist',
  34             'preUpdate',
  35         );
  36     }
  37
  38     /**
  39      * In case of an entry has been updated.
  40      * We won't update the content field if it wasn't updated.
  41      *
  42      * @param LifecycleEventArgs $args
  43      */
  44     public function preUpdate(LifecycleEventArgs $args)
  45     {
  46         $entity = $args->getEntity();
  47
  48         if (!$entity instanceof Entry) {
  49             return;
  50         }
  51
  52         $config = new $this->configClass();
  53         $config->setEntityManager($args->getEntityManager());
  54
  55         // field content has been updated
  56         if ($args->hasChangedField('content')) {
  57             $html = $this->downloadImages($config, $entity);
  58
  59             if (false !== $html) {
  60                 $args->setNewValue('content', $html);
  61             }
  62         }
  63
  64         // field preview picture has been updated
  65         if ($args->hasChangedField('previewPicture')) {
  66             $previewPicture = $this->downloadPreviewImage($config, $entity);
  67
  68             if (false !== $previewPicture) {
  69                 $entity->setPreviewPicture($previewPicture);
  70             }
  71         }
  72     }
  73
  74     /**
  75      * When a new entry is saved.
  76      *
  77      * @param LifecycleEventArgs $args
  78      */
  79     public function prePersist(LifecycleEventArgs $args)
  80     {
  81         $entity = $args->getEntity();
  82
  83         if (!$entity instanceof Entry) {
  84             return;
  85         }
  86
  87         $config = new $this->configClass();
  88         $config->setEntityManager($args->getEntityManager());
  89
  90         // update all images inside the html
  91         $html = $this->downloadImages($config, $entity);
  92         if (false !== $html) {
  93             $entity->setContent($html);
  94         }
  95
  96         // update preview picture
  97         $previewPicture = $this->downloadPreviewImage($config, $entity);
  98         if (false !== $previewPicture) {
  99             $entity->setPreviewPicture($previewPicture);
 100         }
 101     }
 102
 103     /**
 104      * Download all images from the html.
 105      *
 106      * @param Config $config
 107      * @param Entry  $entry
 108      *
 109      * @return string|false False in case of async
 110      */
 111     public function downloadImages(Config $config, Entry $entry)
 112     {
 113         $this->downloadImages->setWallabagUrl($config->get('wallabag_url'));
 114
 115         // if ($config->get('download_images_with_rabbitmq')) {
 116
 117         // } else if ($config->get('download_images_with_redis')) {
 118
 119         // }
 120
 121         return $this->downloadImages->processHtml(
 122             $entry->getContent(),
 123             $entry->getUrl()
 124         );
 125     }
 126
 127     /**
 128      * Download the preview picture.
 129      *
 130      * @param Config $config
 131      * @param Entry  $entry
 132      *
 133      * @return string|false False in case of async
 134      */
 135     public function downloadPreviewImage(Config $config, Entry $entry)
 136     {
 137         $this->downloadImages->setWallabagUrl($config->get('wallabag_url'));
 138
 139         // if ($config->get('download_images_with_rabbitmq')) {
 140
 141         // } else if ($config->get('download_images_with_redis')) {
 142
 143         // }
 144
 145         return $this->downloadImages->processSingleImage(
 146             $entry->getPreviewPicture(),
 147             $entry->getUrl()
 148         );
 149     }
 150 }