Added avatar image upload

app/Controller/AvatarFile.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace Kanboard\Controller;
+
+use Kanboard\Core\ObjectStorage\ObjectStorageException;
+use Kanboard\Core\Thumbnail;
+
+/**
+ * Avatar File Controller
+ *
+ * @package  controller
+ * @author   Frederic Guillot
+ */
+class AvatarFile extends Base
+{
+    /**
+     * Show Avatar image and send aggressive caching headers
+     */
+    public function show()
+    {
+        $user_id = $this->request->getIntegerParam('user_id');
+        $size = $this->request->getStringParam('size', 48);
+        $filename = $this->avatarFile->getFilename($user_id);
+        $etag = md5($filename.$size);
+
+        $this->response->cache(365 * 86400, $etag);
+        $this->response->contentType('image/jpeg');
+
+        if ($this->request->getHeader('If-None-Match') !== '"'.$etag.'"') {
+            $this->render($filename, $size);
+        } else {
+            $this->response->status(304);
+        }
+    }
+
+    /**
+     * Render thumbnail from object storage
+     *
+     * @access private
+     * @param  string  $filename
+     * @param  integer $size
+     */
+    private function render($filename, $size)
+    {
+        try {
+            $blob = $this->objectStorage->get($filename);
+
+            Thumbnail::createFromString($blob)
+                ->resize($size, $size)
+                ->toOutput();
+        } catch (ObjectStorageException $e) {
+            $this->logger->error($e->getMessage());
+        }
+    }
+}