change datatable to accept multisort

app/Services/DataTable/DataTableInput.php

@@ -57,12 +57,17 @@ class DataTableInput
     }
 
     /**
-     * @return Sort|null
+     * @return array|null
      */
-    public function getSorting(): ?Sort
+    public function getSorting(): ?array
     {
-        return !empty($this->sorting) ?
-            new Sort($this->sorting[0]->id, $this->sorting[0]->desc, $this->allowedSortings) : null;
+        $sorts = [];
+        if (!empty($this->sorting)){
+            foreach ($this->sorting as $sort) {
+                $sorts[] =  new Sort($sort->id, $sort->desc, $this->allowedSortings);
+            }
+        }
+        return $sorts == [] ? null : $sorts;
     }
 
     public function getRelations(): array

app/Services/DataTable/DataTableService.php

@@ -83,7 +83,10 @@ class DataTableService
         }
 
         $sorting = $this->dataTableInput->getSorting();
-        $query = (new ApplySort($query, $sorting))->apply();
+        foreach ($sorting as $sort){
+            $query = (new ApplySort($query, $sort))->apply();
+        }
+        
         return $query;
     }