#114 - Add NullAnonymizer

docs/content/anonymization/core-anonymizers.md

@@ -265,6 +265,41 @@ customer:
 ```
 :::
 
+## NullAnonymizer
+
+Set all value to `NULL`.
+
+::: code-group
+```php [Attribute]
+namespace App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+use MakinaCorpus\DbToolsBundle\Attribute\Anonymize;
+
+#[ORM\Entity()]
+#[ORM\Table(name: 'customer')]
+class Customer
+{
+    // ...
+
+    #[ORM\Column]
+    #[Anonymize(type: 'null')] // [!code ++]
+    private ?string $sensibleContent = null;
+
+    // ...
+}
+```
+
+```yml [YAML]
+# config/anonymization.yaml
+
+customer:
+    sensible_content: null
+
+#...
+```
+:::
+
 ## Md5Anonymizer
 
 This *Anonymizer* will fill configured column with a md5 hash of the pre-anonymization value.

src/Anonymization/Anonymizer/Core/NullAnonymizer.php

@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MakinaCorpus\DbToolsBundle\Anonymization\Anonymizer\Core;
+
+use MakinaCorpus\DbToolsBundle\Anonymization\Anonymizer\AbstractAnonymizer;
+use MakinaCorpus\DbToolsBundle\Attribute\AsAnonymizer;
+use MakinaCorpus\QueryBuilder\Query\Update;
+
+#[AsAnonymizer(
+    name: 'null',
+    pack: 'core',
+    description: 'Set to NULL'
+)]
+class NullAnonymizer extends AbstractAnonymizer
+{
+    /**
+     * @inheritdoc
+     */
+    public function anonymize(Update $update): void
+    {
+        $expr = $update->expression();
+        $update->set(
+            $this->columnName,
+            $expr->raw('NULL'),
+        );
+    }
+}

tests/Functional/Anonymizer/Core/NullAnonymizerTest.php

@@ -0,0 +1,75 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MakinaCorpus\DbToolsBundle\Tests\Functional\Anonymizer\Core;
+
+use MakinaCorpus\DbToolsBundle\Anonymization\Config\AnonymizationConfig;
+use MakinaCorpus\DbToolsBundle\Anonymization\Anonymizator;
+use MakinaCorpus\DbToolsBundle\Anonymization\Config\AnonymizerConfig;
+use MakinaCorpus\DbToolsBundle\Anonymization\Anonymizer\AnonymizerRegistry;
+use MakinaCorpus\DbToolsBundle\Anonymization\Anonymizer\Options;
+use MakinaCorpus\DbToolsBundle\Test\FunctionalTestCase;
+
+class NullAnonymizerTest extends FunctionalTestCase
+{
+    /** @before */
+    protected function createTestData(): void
+    {
+        $this->createOrReplaceTable(
+            'table_test',
+            [
+                'id' => 'integer',
+                'data' => 'string',
+            ],
+            [
+                [
+                    'id' => '1',
+                    'data' => 'toto1@example.com',
+                ],
+                [
+                    'id' => '2',
+                    'data' => 'toto2@example.com',
+                ],
+                [
+                    'id' => '3',
+                    'data' => 'toto3@example.com',
+                ],
+                [
+                    'id' => '4',
+                ],
+            ],
+        );
+    }
+
+    public function testAnonymize(): void
+    {
+        $config = new AnonymizationConfig();
+        $config->add(new AnonymizerConfig(
+            'table_test',
+            'data',
+            'null',
+            new Options()
+        ));
+
+        $anonymizator = new Anonymizator(
+            $this->getConnection(),
+            new AnonymizerRegistry(),
+            $config
+        );
+
+        $this->assertSame(
+            "toto1@example.com",
+            $this->getConnection()->executeQuery('select data from table_test where id = 1')->fetchOne(),
+        );
+
+        foreach ($anonymizator->anonymize() as $message) {
+        }
+
+        $datas = $this->getConnection()->executeQuery('select data from table_test order by id asc')->fetchFirstColumn();
+        $this->assertNull($datas[0]);
+        $this->assertNull($datas[1]);
+        $this->assertNull($datas[2]);
+        $this->assertNull($datas[3]);
+    }
+}