Shop improvements, renamed "shop" to "mall", support for Argon2ID

app/Utils/ImageHelpers.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Utils;
+
+use GdImage;
+
+class ImageHelpers
+{
+    public static function imagecopymerge_alpha(GDImage $dst_im, GDImage $src_im, int $dst_x, int $dst_y, int $src_x, int $src_y, int $src_w, int $src_h, int $pct): bool
+    {
+        // creating a cut resource
+        $cut = imagecreatetruecolor($src_w, $src_h);
+
+        // copying relevant section from background to the cut resource
+        imagecopy($cut, $dst_im, 0, 0, $dst_x, $dst_y, $src_w, $src_h);
+
+        // copying relevant section from watermark to the cut resource
+        imagecopy($cut, $src_im, 0, 0, $src_x, $src_y, $src_w, $src_h);
+
+        // insert cut resource to destination image
+        return imagecopymerge($dst_im, $cut, $dst_x, $dst_y, 0, 0, $src_w, $src_h, $pct);
+    }
+}