gallery: sort by timestamp. slideshow: fix transition bug on firefox

www/galleri/index.php

@@ -52,6 +52,14 @@ function getDirContents($dir, &$results = array()) {
 }
 $images = getDirContents($galleryDir);
 
+function cmpModifyTime($a, $b) {
+	$mtime_a = filemtime($galleryDir . $a);
+	$mtime_b = filemtime($galleryDir . $b);
+	return ($mtime_a > $mtime_b) ? -1 : 1;
+}
+
+usort($images, "cmpModifyTime");
+
 $imageTemplate = '
 <div class="card">
     <div class="card-image-div">
@@ -105,7 +113,6 @@ $imageTemplate = '
             $vars = [
                 "%user"         =>  htmlspecialchars($imguser),
                 "%time"         =>  $modTime,
-                "%timestamp"    =>  filemtime($galleryDir . $value),
                 "%name"         =>  htmlspecialchars($displaypath),
                 "%path"         =>  $serverPath . $value,
 		"%thumbnail"    =>  $serverPath . "/.thumbnails" . $value . ".png",

www/js/slideshow.js

@@ -21,7 +21,7 @@ function stepSlideshow(imgs) {
         //Change source to next picture after it is faded out
         slideshowIndex = (slideshowIndex + 1) % imgs.length; 
         ssi2.src = slideshowFnames[slideshowIndex];
-    }, 800);  
+    }, 1000);
 }
 
 //Initialize slideshow, start interval
@@ -29,4 +29,4 @@ if (slideshowFnames.length > 1) {
     slideshowInterval = setInterval(()=>{
         stepSlideshow(slideshowFnames);
     }, SLIDESHOWDELAYMS);
-}
+}