refactoring of filters

src/Query/BuilderConverter/IsNull.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Lucent\Query\BuilderConverter;
+
+use Illuminate\Database\Query\Builder;
+use Lucent\Query\Filter\Argument;
+
+readonly class IsNull implements IBuilderConverter
+{
+
+    public function __construct(private Argument $argument)
+    {
+    }
+
+    public function toAndQueryBuilder(Builder $builder): Builder
+    {
+        return $builder->whereNull($this->argument->field);
+    }
+
+    public function toOrQueryBuilder(Builder $builder): Builder
+    {
+        return $builder->orWhereNull($this->argument->field);
+    }
+
+}