Almost forgot to keep the original function.

Author: tetebueno

lib/Command/RescanPhotos.php

@@ -89,17 +89,41 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 		}
         if ($userId === null) {
             $this->userManager->callForSeenUsers(function (IUser $user) use ($inBackground) {
-                $this->scanUserPhotos($user->getUID(), $pathToScan, $inBackground);
+                if ($pathToScan === null) {
+                    $this->rescanUserPhotos($user->getUID(), $inBackground);
+                } else {
+                    $this->scanUserPhotos($user->getUID(), $pathToScan, $inBackground);
+                }
             });
         } else {
             $user = $this->userManager->get($userId);
             if ($user !== null) {
-                $this->scanUserPhotos($userId, $pathToScan, $inBackground);
+                if ($pathToScan === null) {
+                    $this->rescanUserPhotos($userId, $inBackground);
+                } else {
+                    $this->scanUserPhotos($userId, $pathToScan, $inBackground);
+                }
             }
         }
         return 0;
     }
 
+	/**
+	 * @param string $userId
+	 * @param bool $inBackground
+	 * @return void
+	 * @throws \OCP\PreConditionNotMetException
+	 */
+    private function rescanUserPhotos(string $userId, bool $inBackground=true) {
+        echo '======== User '.$userId.' ========'."\n";
+        $c = 1;
+        foreach ($this->photofilesService->rescan($userId, $inBackground) as $path) {
+            echo '['.$c.'] Photo "'.$path.'" added'."\n";
+            $c++;
+        }
+        $this->config->setUserValue($userId, 'maps', 'installScanDone', 'yes');
+    }
+
     /**
 	 * @param string $userId
 	 * @param string $pathToScan

lib/Service/PhotofilesService.php

@@ -78,11 +78,23 @@ public function __construct (ILogger $logger,
 		$this->backgroundJobCache = $this->cacheFactory->createDistributed('maps:background-jobs');
     }
 
-    public function rescanPath($userId, $pathToScan, $inBackground=true) {
+    public function rescan($userId, $inBackground=true) {
+		$this->photosCache->clear($userId);
         $userFolder = $this->root->getUserFolder($userId);
-        if ($pathToScan !== null) {
-            $userFolder = $userFolder->get($pathToScan);
+        $photos = $this->gatherPhotoFiles($userFolder, true);
+        $this->photoMapper->deleteAll($userId);
+        foreach ($photos as $photo) {
+			if ($inBackground) {
+				$this->addPhoto($photo, $userId);
+			} else {
+				$this->addPhotoNow($photo, $userId);
+			}
+            yield $photo->getPath();
         }
+    }
+
+    public function rescanPath($userId, $pathToScan, $inBackground=true) {
+        $userFolder = $this->root->getUserFolder($userId)->get($pathToScan);
         $photos = $this->gatherPhotoFiles($userFolder, true);
         foreach ($photos as $photo) {
             if ($inBackground) {