feat: pauses & resumes downloads

src/Download/Downloader/ProcessDownloader.php

@@ -5,12 +5,17 @@ namespace App\Download\Downloader;
 use App\Download\Framework\Entity\Download;
 use App\Monitor\Service\MediaFiles;
 use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\Cache\Adapter\RedisAdapter;
 use Symfony\Component\Process\Exception\ProcessFailedException;
 use Symfony\Component\Process\Process;
 use Symfony\Contracts\Cache\CacheInterface;
 
 class ProcessDownloader implements DownloaderInterface
 {
+    /**
+     * @var RedisAdapter $cache
+     */
+
     public function __construct(
         private EntityManagerInterface $entityManager,
         private MediaFiles $mediaFiles,
@@ -24,16 +29,23 @@ class ProcessDownloader implements DownloaderInterface
     {
         /** @var Download $downloadEntity */
         $downloadEntity = $this->entityManager->getRepository(Download::class)->find($downloadId);
-        $downloadEntity->setProgress(0);
         $this->entityManager->flush();
 
         $downloadPreferences = $downloadEntity->getUser()->getDownloadPreferences();
         $path = $this->getDownloadPath($mediaType, $title, $downloadPreferences);
 
-        $process = (new Process([
-            'wget',
-            $url,
-        ]))->setWorkingDirectory($path);
+        $processArgs = ['wget', $url];
+
+        if ($downloadEntity->getStatus() === 'Paused') {
+            $downloadEntity->setStatus('In Progress');
+            $processArgs = ['wget', '-c', $url];
+        } else {
+            $downloadEntity->setProgress(0);
+        }
+
+        fwrite(STDOUT, implode(" ", $processArgs));
+
+        $process = (new Process($processArgs))->setWorkingDirectory($path);
 
         $process->setTimeout(1800); // 30 min
         $process->setIdleTimeout(600); // 10 min
@@ -48,10 +60,10 @@ class ProcessDownloader implements DownloaderInterface
                 // The PauseDownloadHandler will set this to 'true'
                 $doPause = $this->cache->getItem('download.pause.' . $downloadEntity->getId());
 
-                if (true === $doPause->isHit()) {
+                if (true === $doPause->isHit() && true === $doPause->get()) {
                     $downloadEntity->setStatus('Paused');
+                    $this->cache->deleteItem('download.pause.' . $downloadEntity->getId());
                     $this->entityManager->flush();
-                    $doPause->expiresAt(new \DateTimeImmutable('now'));
                     $process->stop();
                 }