Fire POST_FILE_DOWNLOAD event for metadata fetched by ComposerRepository.

src/Composer/Plugin/PostFileDownloadEvent.php

@@ -38,32 +38,41 @@ class PostFileDownloadEvent extends Event
     private $url;
 
     /**
-     * @var \Composer\Package\PackageInterface
+     * @var mixed
      */
-    private $package;
+    private $context;
+
+    /**
+     * @var string
+     */
+    private $type;
 
     /**
      * Constructor.
      *
      * @param string           $name     The event name
-     * @param string           $fileName The file name
+     * @param string|null      $fileName The file name
      * @param string|null      $checksum The checksum
      * @param string           $url      The processed url
-     * @param PackageInterface $package  The package.
+     * @param mixed            $context  Additional context for the download.
+     * @param string           $type     The type (package or metadata).
      */
-    public function __construct($name, $fileName, $checksum, $url, PackageInterface $package)
+    public function __construct($name, $fileName, $checksum, $url, $context = null, $type = 'package')
     {
         parent::__construct($name);
         $this->fileName = $fileName;
         $this->checksum = $checksum;
         $this->url = $url;
-        $this->package = $package;
+        $this->context = $context;
+        $this->type = $type;
     }
 
     /**
      * Retrieves the target file name location.
      *
-     * @return string
+     * If this download is of type metadata, null is returned.
+     *
+     * @return string|null
      */
     public function getFileName()
     {
@@ -90,13 +99,39 @@ class PostFileDownloadEvent extends Event
         return $this->url;
     }
 
+    /**
+     * Returns the context of this download, if any.
+     *
+     * If this download is of type package, the package object is returned. If
+     * this download is of type metadata, the HTTP response is returned.
+     *
+     * @return mixed
+     */
+    public function getContext()
+    {
+        return $this->context;
+    }
+
     /**
      * Get the package.
      *
-     * @return \Composer\Package\PackageInterface The package.
+     * If this download is of type metadata, null is returned.
+     *
+     * @return \Composer\Package\PackageInterface|null The package.
      */
     public function getPackage()
     {
-        return $this->package;
+        $context = $this->getContext();
+        return $context instanceof PackageInterface ? $context : null;
+    }
+
+    /**
+     * Returns the type of this download (package, metadata).
+     *
+     * @return string
+     */
+    public function getType()
+    {
+        return $this->type;
     }
 }

src/Composer/Repository/ComposerRepository.php

@@ -22,6 +22,7 @@ use Composer\Json\JsonFile;
 use Composer\Cache;
 use Composer\Config;
 use Composer\IO\IOInterface;
+use Composer\Plugin\PostFileDownloadEvent;
 use Composer\Semver\CompilingMatcher;
 use Composer\Util\HttpDownloader;
 use Composer\Util\Loop;
@@ -1110,6 +1111,11 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
                     throw new RepositorySecurityException('The contents of '.$filename.' do not match its signature. This could indicate a man-in-the-middle attack or e.g. antivirus software corrupting files. Try running composer again and report this if you think it is a mistake.');
                 }
 
+                if ($this->eventDispatcher) {
+                    $postFileDownloadEvent = new PostFileDownloadEvent(PluginEvents::POST_FILE_DOWNLOAD, null, $sha256, $filename, $response, 'metadata');
+                    $this->eventDispatcher->dispatch($postFileDownloadEvent->getName(), $postFileDownloadEvent);
+                }
+
                 $data = $response->decodeJson();
                 HttpDownloader::outputWarnings($this->io, $this->url, $data);
 
@@ -1188,6 +1194,11 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
                     return true;
                 }
 
+                if ($this->eventDispatcher) {
+                    $postFileDownloadEvent = new PostFileDownloadEvent(PluginEvents::POST_FILE_DOWNLOAD, null, null, $filename, $response, 'metadata');
+                    $this->eventDispatcher->dispatch($postFileDownloadEvent->getName(), $postFileDownloadEvent);
+                }
+
                 $data = $response->decodeJson();
                 HttpDownloader::outputWarnings($this->io, $this->url, $data);
 
@@ -1258,9 +1269,10 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
         $url = $this->url;
         $cache = $this->cache;
         $degradedMode = &$this->degradedMode;
+        $eventDispatcher = $this->eventDispatcher;
         $repo = $this;
 
-        $accept = function ($response) use ($io, $url, $filename, $cache, $cacheKey, $repo) {
+        $accept = function ($response) use ($io, $url, $filename, $cache, $cacheKey, $eventDispatcher, $repo) {
             // package not found is acceptable for a v2 protocol repository
             if ($response->getStatusCode() === 404) {
                 $repo->packagesNotFoundCache[$filename] = true;
@@ -1275,6 +1287,11 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
                 return true;
             }
 
+            if ($eventDispatcher) {
+                $postFileDownloadEvent = new PostFileDownloadEvent(PluginEvents::POST_FILE_DOWNLOAD, null, null, $url, $response, 'metadata');
+                $eventDispatcher->dispatch($postFileDownloadEvent->getName(), $postFileDownloadEvent);
+            }
+
             $data = $response->decodeJson();
             HttpDownloader::outputWarnings($io, $url, $data);