class BulkDeleteTest

class BulkDeleteTest extends FieldKernelTestBase {
    
    /**
     * The fields to use in this test.
     *
     * @var array
     */
    protected $fieldStorages;
    
    /**
     * The entities to use in this test.
     *
     * @var array
     */
    protected $entities;
    
    /**
     * The entities to use in this test, keyed by bundle.
     *
     * @var array
     */
    protected $entitiesByBundles;
    
    /**
     * The bundles for the entities used in this test.
     *
     * @var array
     */
    protected $bundles;
    
    /**
     * The entity type to be used in the test classes.
     *
     * @var string
     */
    protected $entityTypeId = 'entity_test';
    
    /**
     * Tests that the expected hooks have been invoked on the expected entities.
     *
     * @param $expected_hooks
     *   An array keyed by hook name, with one entry per expected invocation.
     *   Each entry is the value of the "$entity" parameter the hook is expected
     *   to have been passed.
     * @param $actual_hooks
     *   The array of actual hook invocations recorded by field_test_memorize().
     */
    public function checkHooksInvocations($expected_hooks, $actual_hooks) : void {
        foreach ($expected_hooks as $hook => $invocations) {
            $actual_invocations = $actual_hooks[$hook];
            // Check that the number of invocations is correct.
            $this->assertSameSize($invocations, $actual_invocations, "{$hook}() was called the expected number of times.");
            // Check that the hook was called for each expected argument.
            foreach ($invocations as $argument) {
                $found = FALSE;
                foreach ($actual_invocations as $actual_arguments) {
                    // The argument we are looking for is either an array of entities as
                    // the second argument or a single entity object as the first.
                    if ($argument instanceof EntityInterface && $actual_arguments[0]->id() == $argument->id()) {
                        $found = TRUE;
                        break;
                    }
                    elseif (is_array($argument) && count($actual_arguments[1]) == count($argument) && count(array_diff_key($actual_arguments[1], $argument)) == 0) {
                        $found = TRUE;
                        break;
                    }
                }
                $this->assertTrue($found, "{$hook}() was called on expected argument");
            }
        }
    }
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->fieldStorages = [];
        $this->entities = [];
        $this->entitiesByBundles = [];
        // Create two bundles.
        $this->bundles = [
            'bb_1' => 'bb_1',
            'bb_2' => 'bb_2',
        ];
        foreach ($this->bundles as $name => $desc) {
            entity_test_create_bundle($name, $desc);
        }
        // Create two field storages.
        $field_storage = FieldStorageConfig::create([
            'field_name' => 'bf_1',
            'entity_type' => $this->entityTypeId,
            'type' => 'test_field',
            'cardinality' => 1,
        ]);
        $field_storage->save();
        $this->fieldStorages[] = $field_storage;
        $field_storage = FieldStorageConfig::create([
            'field_name' => 'bf_2',
            'entity_type' => $this->entityTypeId,
            'type' => 'test_field',
            'cardinality' => 4,
        ]);
        $field_storage->save();
        $this->fieldStorages[] = $field_storage;
        // For each bundle, create each field, and 10 entities with values for the
        // fields.
        foreach ($this->bundles as $bundle) {
            foreach ($this->fieldStorages as $field_storage) {
                FieldConfig::create([
                    'field_storage' => $field_storage,
                    'bundle' => $bundle,
                ])->save();
            }
            for ($i = 0; $i < 10; $i++) {
                $entity = $this->container
                    ->get('entity_type.manager')
                    ->getStorage($this->entityTypeId)
                    ->create([
                    'type' => $bundle,
                ]);
                foreach ($this->fieldStorages as $field_storage) {
                    $entity->{$field_storage->getName()}
                        ->setValue($this->_generateTestFieldValues($field_storage->getCardinality()));
                }
                $entity->save();
            }
        }
        $this->entities = $this->container
            ->get('entity_type.manager')
            ->getStorage($this->entityTypeId)
            ->loadMultiple();
        foreach ($this->entities as $entity) {
            // This test relies on the entities having stale field definitions
            // so that the deleted field can be accessed on them. Access the field
            // now, so that they are always loaded.
            $entity->bf_1->value;
            // Also keep track of the entities per bundle.
            $this->entitiesByBundles[$entity->bundle()][$entity->id()] = $entity;
        }
    }
    
    /**
     * Tests deleting fields.
     *
     * Verify that deleting a field leaves the field data items in the database
     * and that the appropriate Field API functions can operate on the deleted
     * data and field definition.
     *
     * This tests how EntityFieldQuery interacts with field deletion and could be
     * moved to FieldCrudTestCase, but depends on this class's setUp().
     */
    public function testDeleteField() : void {
        $bundle = reset($this->bundles);
        $field_storage = reset($this->fieldStorages);
        $field_name = $field_storage->getName();
        $storage = \Drupal::entityTypeManager()->getStorage('entity_test');
        // There are 10 entities of this bundle.
        $found = $storage->getQuery()
            ->accessCheck(FALSE)
            ->condition('type', $bundle)
            ->execute();
        $this->assertCount(10, $found, 'Correct number of entities found before deleting');
        // Delete the field.
        $field = FieldConfig::loadByName($this->entityTypeId, $bundle, $field_name);
        $field->delete();
        // The field still exists, deleted.
        $fields = \Drupal::entityTypeManager()->getStorage('field_config')
            ->loadByProperties([
            'field_storage_uuid' => $field_storage->uuid(),
            'deleted' => TRUE,
            'include_deleted' => TRUE,
        ]);
        $this->assertCount(1, $fields, 'There is one deleted field');
        $field = $fields[$field->uuid()];
        $this->assertEquals($bundle, $field->getTargetBundle(), 'The deleted field is for the correct bundle');
        // Check that the actual stored content did not change during delete.
        
        /** @var \Drupal\Core\Entity\Sql\DefaultTableMapping $table_mapping */
        $table_mapping = $storage->getTableMapping();
        $table = $table_mapping->getDedicatedDataTableName($field_storage);
        $column = $table_mapping->getFieldColumnName($field_storage, 'value');
        $result = Database::getConnection()->select($table, 't')
            ->fields('t')
            ->execute();
        foreach ($result as $row) {
            $this->assertEquals($row->{$column}, $this->entities[$row->entity_id]->{$field_name}->value);
        }
        // There are 0 entities of this bundle with non-deleted data.
        $found = $storage->getQuery()
            ->accessCheck(FALSE)
            ->condition('type', $bundle)
            ->condition("{$field_name}.deleted", 0)
            ->execute();
        $this->assertEmpty($found, 'No entities found after deleting');
        // There are 10 entities of this bundle when deleted fields are allowed, and
        // their values are correct.
        $found = $storage->getQuery()
            ->accessCheck(FALSE)
            ->condition('type', $bundle)
            ->condition("{$field_name}.deleted", 1)
            ->sort('id')
            ->execute();
        $this->assertCount(10, $found, 'Correct number of entities found after deleting');
        $this->assertEmpty(array_diff($found, array_keys($this->entities)));
    }
    
    /**
     * Tests that recreating a field with the name as a deleted field works.
     */
    public function testPurgeWithDeletedAndActiveField() : void {
        $bundle = reset($this->bundles);
        // Create another field storage.
        $field_name = 'bf_3';
        $deleted_field_storage = FieldStorageConfig::create([
            'field_name' => $field_name,
            'entity_type' => $this->entityTypeId,
            'type' => 'test_field',
            'cardinality' => 1,
        ]);
        $deleted_field_storage->save();
        // Create the field.
        FieldConfig::create([
            'field_storage' => $deleted_field_storage,
            'bundle' => $bundle,
        ])->save();
        for ($i = 0; $i < 20; $i++) {
            $entity = $this->container
                ->get('entity_type.manager')
                ->getStorage($this->entityTypeId)
                ->create([
                'type' => $bundle,
            ]);
            $entity->{$field_name}
                ->setValue($this->_generateTestFieldValues(1));
            $entity->save();
        }
        // Delete the field.
        $deleted_field = FieldConfig::loadByName($this->entityTypeId, $bundle, $field_name);
        $deleted_field->delete();
        $deleted_field_uuid = $deleted_field->uuid();
        // Reload the field storage.
        $field_storages = \Drupal::entityTypeManager()->getStorage('field_storage_config')
            ->loadByProperties([
            'uuid' => $deleted_field_storage->uuid(),
            'include_deleted' => TRUE,
        ]);
        $deleted_field_storage = reset($field_storages);
        // Create the field again.
        $field_storage = FieldStorageConfig::create([
            'field_name' => $field_name,
            'entity_type' => $this->entityTypeId,
            'type' => 'test_field',
            'cardinality' => 1,
        ]);
        $field_storage->save();
        FieldConfig::create([
            'field_storage' => $field_storage,
            'bundle' => $bundle,
        ])->save();
        // The field still exists, deleted, with the same field name.
        $fields = \Drupal::entityTypeManager()->getStorage('field_config')
            ->loadByProperties([
            'uuid' => $deleted_field_uuid,
            'include_deleted' => TRUE,
        ]);
        $this->assertArrayHasKey($deleted_field_uuid, $fields);
        $this->assertTrue($fields[$deleted_field_uuid]->isDeleted());
        $this->assertSame($field_name, $fields[$deleted_field_uuid]->getName());
        for ($i = 0; $i < 10; $i++) {
            $entity = $this->container
                ->get('entity_type.manager')
                ->getStorage($this->entityTypeId)
                ->create([
                'type' => $bundle,
            ]);
            $entity->{$field_name}
                ->setValue($this->_generateTestFieldValues(1));
            $entity->save();
        }
        // Check that the two field storages have different tables.
        $storage = \Drupal::entityTypeManager()->getStorage($this->entityTypeId);
        
        /** @var \Drupal\Core\Entity\Sql\DefaultTableMapping $table_mapping */
        $table_mapping = $storage->getTableMapping();
        $deleted_table_name = $table_mapping->getDedicatedDataTableName($deleted_field_storage, TRUE);
        $active_table_name = $table_mapping->getDedicatedDataTableName($field_storage);
        field_purge_batch(50);
        // Ensure the new field still has its table and the deleted one has been
        // removed.
        $this->assertTrue(\Drupal::database()->schema()
            ->tableExists($active_table_name));
        $this->assertFalse(\Drupal::database()->schema()
            ->tableExists($deleted_table_name));
        // The field has been removed from the system.
        $fields = \Drupal::entityTypeManager()->getStorage('field_config')
            ->loadByProperties([
            'field_storage_uuid' => $deleted_field_storage->uuid(),
            'deleted' => TRUE,
            'include_deleted' => TRUE,
        ]);
        $this->assertCount(0, $fields, 'The field is gone');
        // Verify there are still 10 entries in the main table.
        $count = \Drupal::database()->select('entity_test__' . $field_name, 'f')
            ->fields('f', [
            'entity_id',
        ])
            ->condition('bundle', $bundle)
            ->countQuery()
            ->execute()
            ->fetchField();
        $this->assertEquals(10, $count);
    }
    
    /**
     * Tests purging fields.
     *
     * Verify that field data items and fields are purged when a field storage is
     * deleted.
     */
    public function testPurgeField() : void {
        // Start recording hook invocations.
        field_test_memorize();
        $bundle = reset($this->bundles);
        $field_storage = reset($this->fieldStorages);
        $field_name = $field_storage->getName();
        // Delete the field.
        $field = FieldConfig::loadByName($this->entityTypeId, $bundle, $field_name);
        $field->delete();
        // No field hooks were called.
        $mem = field_test_memorize();
        $this->assertCount(0, $mem, 'No field hooks were called');
        $batch_size = 2;
        for ($count = 8; $count >= 0; $count -= $batch_size) {
            // Purge two entities.
            field_purge_batch($batch_size);
            // There are $count deleted entities left.
            $found = \Drupal::entityQuery('entity_test')->accessCheck(FALSE)
                ->condition('type', $bundle)
                ->condition($field_name . '.deleted', 1)
                ->execute();
            $this->assertCount($count, $found, 'Correct number of entities found after purging 2');
        }
        // Check hooks invocations.
        // FieldItemInterface::delete() should have been called once for each entity in the
        // bundle.
        $actual_hooks = field_test_memorize();
        $hooks = [];
        $hooks['field_test_field_delete'] = $this->entitiesByBundles[$bundle];
        $this->checkHooksInvocations($hooks, $actual_hooks);
        // The field still exists, deleted.
        $fields = \Drupal::entityTypeManager()->getStorage('field_config')
            ->loadByProperties([
            'field_storage_uuid' => $field_storage->uuid(),
            'deleted' => TRUE,
            'include_deleted' => TRUE,
        ]);
        $this->assertCount(1, $fields, 'There is one deleted field');
        // Purge the field.
        field_purge_batch($batch_size);
        // The field is gone.
        $fields = \Drupal::entityTypeManager()->getStorage('field_config')
            ->loadByProperties([
            'field_storage_uuid' => $field_storage->uuid(),
            'deleted' => TRUE,
            'include_deleted' => TRUE,
        ]);
        $this->assertCount(0, $fields, 'The field is gone');
        // The field storage still exists, not deleted, because it has a second
        // field.
        $storages = \Drupal::entityTypeManager()->getStorage('field_storage_config')
            ->loadByProperties([
            'uuid' => $field_storage->uuid(),
            'include_deleted' => TRUE,
        ]);
        $this->assertTrue(isset($storages[$field_storage->uuid()]), 'The field storage exists and is not deleted');
    }
    
    /**
     * Tests purging field storages.
     *
     * Verify that field storages are preserved and purged correctly as multiple
     * fields are deleted and purged.
     */
    public function testPurgeFieldStorage() : void {
        // Start recording hook invocations.
        field_test_memorize();
        $field_storage = reset($this->fieldStorages);
        $field_name = $field_storage->getName();
        // Delete the first field.
        $bundle = reset($this->bundles);
        $field = FieldConfig::loadByName($this->entityTypeId, $bundle, $field_name);
        $field->delete();
        // Assert that FieldItemInterface::delete() was not called yet.
        $mem = field_test_memorize();
        $this->assertCount(0, $mem, 'No field hooks were called.');
        // Purge the data.
        field_purge_batch(10);
        // Check hooks invocations.
        // FieldItemInterface::delete() should have been called once for each entity in the
        // bundle.
        $actual_hooks = field_test_memorize();
        $hooks = [];
        $hooks['field_test_field_delete'] = $this->entitiesByBundles[$bundle];
        $this->checkHooksInvocations($hooks, $actual_hooks);
        // The field still exists, deleted.
        $fields = \Drupal::entityTypeManager()->getStorage('field_config')
            ->loadByProperties([
            'uuid' => $field->uuid(),
            'include_deleted' => TRUE,
        ]);
        $this->assertArrayHasKey($field->uuid(), $fields);
        $this->assertTrue($fields[$field->uuid()]
            ->isDeleted());
        // Purge again to purge the field.
        field_purge_batch(0);
        // The field is gone.
        $fields = \Drupal::entityTypeManager()->getStorage('field_config')
            ->loadByProperties([
            'uuid' => $field->uuid(),
            'include_deleted' => TRUE,
        ]);
        $this->assertCount(0, $fields, 'The field is purged.');
        // The field storage still exists, not deleted.
        $storages = \Drupal::entityTypeManager()->getStorage('field_storage_config')
            ->loadByProperties([
            'uuid' => $field_storage->uuid(),
            'include_deleted' => TRUE,
        ]);
        $this->assertArrayHasKey($field_storage->uuid(), $storages);
        $this->assertFalse($storages[$field_storage->uuid()]
            ->isDeleted());
        // Delete the second field.
        $bundle = next($this->bundles);
        $field = FieldConfig::loadByName($this->entityTypeId, $bundle, $field_name);
        $field->delete();
        // Assert that FieldItemInterface::delete() was not called yet.
        $mem = field_test_memorize();
        $this->assertCount(0, $mem, 'No field hooks were called.');
        // Purge the data.
        field_purge_batch(10);
        // Check hooks invocations (same as above, for the 2nd bundle).
        $actual_hooks = field_test_memorize();
        $hooks = [];
        $hooks['field_test_field_delete'] = $this->entitiesByBundles[$bundle];
        $this->checkHooksInvocations($hooks, $actual_hooks);
        // The field and the storage still exist, deleted.
        $fields = \Drupal::entityTypeManager()->getStorage('field_config')
            ->loadByProperties([
            'uuid' => $field->uuid(),
            'include_deleted' => TRUE,
        ]);
        $this->assertArrayHasKey($field->uuid(), $fields);
        $this->assertTrue($fields[$field->uuid()]
            ->isDeleted());
        $storages = \Drupal::entityTypeManager()->getStorage('field_storage_config')
            ->loadByProperties([
            'uuid' => $field_storage->uuid(),
            'include_deleted' => TRUE,
        ]);
        $this->assertArrayHasKey($field_storage->uuid(), $storages);
        $this->assertTrue($storages[$field_storage->uuid()]
            ->isDeleted());
        // Purge again to purge the field and the storage.
        field_purge_batch(0);
        // The field and the storage are gone.
        $fields = \Drupal::entityTypeManager()->getStorage('field_config')
            ->loadByProperties([
            'uuid' => $field->uuid(),
            'include_deleted' => TRUE,
        ]);
        $this->assertCount(0, $fields, 'The field is purged.');
        $storages = \Drupal::entityTypeManager()->getStorage('field_storage_config')
            ->loadByProperties([
            'uuid' => $field_storage->uuid(),
            'include_deleted' => TRUE,
        ]);
        $this->assertCount(0, $storages, 'The field storage is purged.');
    }

}