Adding Statement::when conditionable

src/Statement.php

@@ -292,6 +292,25 @@ public function limit(int $limit): self
         return $clone;
     }
 
+    /**
+     * @template TWhenParameter
+     *
+     * @param (Closure($this): TWhenParameter)|TWhenParameter $value
+     * @param callable($this, TWhenParameter): ($this|null) $callback
+     */
+    public function when($value, callable $callback): self
+    {
+        if ($value instanceof Closure) {
+            $value = $value($this);
+        }
+
+        if (!$value) {
+            return $this;
+        }
+
+        return $callback($this, $value) ?? $this;
+    }
+
     /**
      * Executes the prepared Statement on the {@link TabularDataReader} object.
      *
@@ -437,7 +456,6 @@ protected function buildOrderBy(Iterator $iterator): Iterator
             return $cmp ?? 0;
         };
 
-
         $class = new class () extends ArrayIterator {
             public function seek(int $offset): void
             {