create snapshot image for dirs

themes/beauty/controller/SiteController.php

@@ -317,6 +317,24 @@ Class SiteController extends Controller {
                                 //当前目录有缩略图的时候才缓存
                                 $cacheSubDir = 'dir';
                                 Common::saveCacheToFile($cacheKey, compact('url', 'size'), $cacheSubDir);
+                            }else {
+                                //实时生成缩略图
+                                $img_filepath = $imgFile['realpath'];
+                                $img_data = $this->createSmallJpg($img_filepath);
+                                if (!empty($img_data)) {
+                                    //保存到缓存文件
+                                    $cacheKey_smimg = $this->getCacheKey($imgFile['id'], 'imgsm');
+                                    $cacheSubDir = 'image';
+                                    $base64_img = base64_encode($img_data);
+                                    Common::saveCacheToFile($cacheKey_smimg, "data:image/jpeg;base64,{$base64_img}", $cacheSubDir);
+
+                                    $url = "data:image/jpeg;base64,{$base64_img}";
+                                    $size = 'small';
+
+                                    //缓存目录封面图
+                                    $cacheSubDir = 'dir';
+                                    Common::saveCacheToFile($cacheKey, compact('url', 'size'), $cacheSubDir);
+                                }
                             }
                         }else if (empty(FSC::$app['config']['enableSmallImage']) || FSC::$app['config']['enableSmallImage'] === 'false') {
                             //如果关闭了缩略图功能则缓存原图