Added drop operation for enum

Author: siamskoi

src/V2/Migration.php

@@ -74,11 +74,10 @@ protected function foreignKey(array $fields, string $table, array $outerKeys): F
         return new ForeignKey($fields, $table, $outerKeys);
     }
 
-    protected function enum(string $name, array $values): TypeBuilder
+    protected function enum(string $name): TypeBuilder
     {
         return new TypeBuilder(
             $name,
-            $values,
             TypeBuilder::ENUM,
             $this->database()
         );

src/V2/TypeBuilder.php

@@ -5,6 +5,7 @@
 namespace Cycle\Migrations\V2;
 
 use Cycle\Database\DatabaseInterface;
+use Cycle\Migrations\Exception\OperationException;
 
 class TypeBuilder
 {
@@ -18,18 +19,20 @@ class TypeBuilder
 
     public function __construct(
         string $name,
-        array $values,
         string $type,
         DatabaseInterface $db
     ) {
         $this->db = $db;
         $this->name = $name;
-        $this->values = $values;
         $this->type = $type;
     }
 
     public function create(): void
     {
+        if (empty($this->values)) {
+            throw new OperationException('Values can\'t be empty');
+        }
+
         $values = implode(',', array_map(static fn($v) => "'{$v}'", $this->values));
 
         $query = sprintf(
@@ -50,4 +53,11 @@ public function drop(): void
         $this->db->commit();
 
     }
+
+    public function addValues(array $values): self
+    {
+        $this->values = $values;
+
+        return $this;
+    }
 }