Media: Allow to change the default data deletion policy

Web/Models/Entities/Media.php

@@ -89,4 +89,21 @@ abstract class Media extends Postable
         
         $this->stateChanges("hash", $hash);
     }
+    
+    function delete(bool $softly = true): void
+    {
+        $deleteQuirk = ovkGetQuirk("blobs.erase-upon-deletion");
+        if($deleteQuirk === 2 || ($deleteQuirk === 1 && !$softly))
+            @unlink($this->getFileName());
+        
+        parent::delete($softly);
+    }
+    
+    function undelete(): void
+    {
+        if(ovkGetQuirk("blobs.erase-upon-deletion") === 2)
+            throw new \LogicException("Can't undelete model which is tied to blob, because of config constraint (quriks.yml:blobs.erase-upon-deletion)");
+        
+        parent::undelete();
+    }
 }

quirks.yml

@@ -12,3 +12,16 @@
 # + Set this option to 1 if you want to use quirky OpenVK behaviour
 # + Set this option to 0 if you want to use the canonical VK behaviour
 profile.rating-bar-behaviour: 0
+
+# Blob deletion behaviour
+# Current VK and old OpenVK don't delete files automatically,
+# thus leaving ability to access user-deleted medias by direct URL.
+# This config option allows to change this.
+# 
+# Possible values:
+# + Set this option to 2 if you want to delete files upon user-initiated deletion
+#  (this option will prohibit restoring any deleted media)
+# + Set this option to 1 if you want to delete files once they're removed from DB completely
+#  (this option most likely won't have any meaningful effect, please use option 2)
+# + Set this option to 0 if you want to use quirky VK and OpenVK behaviour
+blobs.erase-upon-deletion: 0