class EntityAutocompleteElementFormTest

class EntityAutocompleteElementFormTest extends EntityKernelTestBase implements FormInterface {
    
    /**
     * User for testing.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $testUser;
    
    /**
     * User for autocreate testing.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $testAutocreateUser;
    
    /**
     * An array of entities to be referenced in this test.
     *
     * @var \Drupal\Core\Entity\EntityInterface[]
     */
    protected $referencedEntities;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->installEntitySchema('entity_test_string_id');
        // Create user 1 so that the user created later in the test has a different
        // user ID.
        // @todo Remove in https://www.drupal.org/node/540008.
        User::create([
            'uid' => 1,
            'name' => 'user1',
        ])->save();
        Role::create([
            'id' => 'test_role',
            'label' => 'Can view test entities',
            'permissions' => [
                'view test entity',
            ],
        ])->save();
        $this->testUser = User::create([
            'name' => 'foobar1',
            'mail' => 'foobar1@example.com',
            'roles' => [
                'test_role',
            ],
        ]);
        $this->testUser
            ->save();
        \Drupal::service('current_user')->setAccount($this->testUser);
        $this->testAutocreateUser = User::create([
            'name' => 'foobar2',
            'mail' => 'foobar2@example.com',
        ]);
        $this->testAutocreateUser
            ->save();
        for ($i = 1; $i < 3; $i++) {
            $entity = EntityTest::create([
                'name' => $this->randomMachineName(),
            ]);
            $entity->save();
            $this->referencedEntities[] = $entity;
        }
        // Use special characters in the ID of some of the test entities so we can
        // test if these are handled correctly.
        for ($i = 0; $i < 2; $i++) {
            $entity = EntityTestStringId::create([
                'name' => $this->randomMachineName(),
                'id' => $this->randomMachineName() . '&</\\:?',
            ]);
            $entity->save();
            $this->referencedEntities[] = $entity;
        }
        $entity = EntityTest::create([
            'name' => '0',
        ]);
        $entity->save();
        $this->referencedEntities[] = $entity;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        return 'test_entity_autocomplete';
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildForm(array $form, FormStateInterface $form_state) {
        $form['single'] = [
            '#type' => 'entity_autocomplete',
            '#target_type' => 'entity_test',
        ];
        $form['single_autocreate'] = [
            '#type' => 'entity_autocomplete',
            '#target_type' => 'entity_test',
            '#autocreate' => [
                'bundle' => 'entity_test',
            ],
        ];
        $form['single_autocreate_specific_uid'] = [
            '#type' => 'entity_autocomplete',
            '#target_type' => 'entity_test',
            '#autocreate' => [
                'bundle' => 'entity_test',
                'uid' => $this->testAutocreateUser
                    ->id(),
            ],
        ];
        $form['tags'] = [
            '#type' => 'entity_autocomplete',
            '#target_type' => 'entity_test',
            '#tags' => TRUE,
        ];
        $form['tags_autocreate'] = [
            '#type' => 'entity_autocomplete',
            '#target_type' => 'entity_test',
            '#tags' => TRUE,
            '#autocreate' => [
                'bundle' => 'entity_test',
            ],
        ];
        $form['tags_autocreate_specific_uid'] = [
            '#type' => 'entity_autocomplete',
            '#target_type' => 'entity_test',
            '#tags' => TRUE,
            '#autocreate' => [
                'bundle' => 'entity_test',
                'uid' => $this->testAutocreateUser
                    ->id(),
            ],
        ];
        $form['single_no_validate'] = [
            '#type' => 'entity_autocomplete',
            '#target_type' => 'entity_test',
            '#validate_reference' => FALSE,
        ];
        $form['single_autocreate_no_validate'] = [
            '#type' => 'entity_autocomplete',
            '#target_type' => 'entity_test',
            '#validate_reference' => FALSE,
            '#autocreate' => [
                'bundle' => 'entity_test',
            ],
        ];
        $form['single_access'] = [
            '#type' => 'entity_autocomplete',
            '#target_type' => 'entity_test',
            '#default_value' => $this->referencedEntities[0],
        ];
        $form['tags_access'] = [
            '#type' => 'entity_autocomplete',
            '#target_type' => 'entity_test',
            '#tags' => TRUE,
            '#default_value' => [
                $this->referencedEntities[0],
                $this->referencedEntities[1],
            ],
        ];
        $form['single_string_id'] = [
            '#type' => 'entity_autocomplete',
            '#target_type' => 'entity_test_string_id',
        ];
        $form['tags_string_id'] = [
            '#type' => 'entity_autocomplete',
            '#target_type' => 'entity_test_string_id',
            '#tags' => TRUE,
        ];
        $form['single_name_0'] = [
            '#type' => 'entity_autocomplete',
            '#target_type' => 'entity_test',
        ];
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
    }
    
    /**
     * {@inheritdoc}
     */
    public function validateForm(array &$form, FormStateInterface $form_state) {
    }
    
    /**
     * Tests valid entries in the EntityAutocomplete Form API element.
     */
    public function testValidEntityAutocompleteElement() : void {
        $form_state = (new FormState())->setValues([
            'single' => $this->getAutocompleteInput($this->referencedEntities[0]),
            'single_autocreate' => 'single - autocreated entity label',
            'single_autocreate_specific_uid' => 'single - autocreated entity label with specific uid',
            'tags' => $this->getAutocompleteInput($this->referencedEntities[0]) . ', ' . $this->getAutocompleteInput($this->referencedEntities[1]),
            'tags_autocreate' => $this->getAutocompleteInput($this->referencedEntities[0]) . ', tags - autocreated entity label, ' . $this->getAutocompleteInput($this->referencedEntities[1]),
            'tags_autocreate_specific_uid' => $this->getAutocompleteInput($this->referencedEntities[0]) . ', tags - autocreated entity label with specific uid, ' . $this->getAutocompleteInput($this->referencedEntities[1]),
            'single_string_id' => $this->getAutocompleteInput($this->referencedEntities[2]),
            'tags_string_id' => $this->getAutocompleteInput($this->referencedEntities[2]) . ', ' . $this->getAutocompleteInput($this->referencedEntities[3]),
            'single_name_0' => $this->referencedEntities[4]
                ->label(),
        ]);
        $form_builder = $this->container
            ->get('form_builder');
        $form_builder->submitForm($this, $form_state);
        // Valid form state.
        $this->assertCount(0, $form_state->getErrors());
        // Test the 'single' element.
        $this->assertEquals($this->referencedEntities[0]
            ->id(), $form_state->getValue('single'));
        // Test the 'single_autocreate' element.
        $value = $form_state->getValue('single_autocreate');
        $this->assertEquals('single - autocreated entity label', $value['entity']->label());
        $this->assertEquals('entity_test', $value['entity']->bundle());
        $this->assertEquals($this->testUser
            ->id(), $value['entity']->getOwnerId());
        // Test the 'single_autocreate_specific_uid' element.
        $value = $form_state->getValue('single_autocreate_specific_uid');
        $this->assertEquals('single - autocreated entity label with specific uid', $value['entity']->label());
        $this->assertEquals('entity_test', $value['entity']->bundle());
        $this->assertEquals($this->testAutocreateUser
            ->id(), $value['entity']->getOwnerId());
        // Test the 'tags' element.
        $expected = [
            [
                'target_id' => $this->referencedEntities[0]
                    ->id(),
            ],
            [
                'target_id' => $this->referencedEntities[1]
                    ->id(),
            ],
        ];
        $this->assertEquals($expected, $form_state->getValue('tags'));
        // Test the 'single_autocreate' element.
        $value = $form_state->getValue('tags_autocreate');
        // First value is an existing entity.
        $this->assertEquals($this->referencedEntities[0]
            ->id(), $value[0]['target_id']);
        // Second value is an autocreated entity.
        $this->assertTrue(!isset($value[1]['target_id']));
        $this->assertEquals('tags - autocreated entity label', $value[1]['entity']->label());
        $this->assertEquals($this->testUser
            ->id(), $value[1]['entity']->getOwnerId());
        // Third value is an existing entity.
        $this->assertEquals($this->referencedEntities[1]
            ->id(), $value[2]['target_id']);
        // Test the 'tags_autocreate_specific_uid' element.
        $value = $form_state->getValue('tags_autocreate_specific_uid');
        // First value is an existing entity.
        $this->assertEquals($this->referencedEntities[0]
            ->id(), $value[0]['target_id']);
        // Second value is an autocreated entity.
        $this->assertTrue(!isset($value[1]['target_id']));
        $this->assertEquals('tags - autocreated entity label with specific uid', $value[1]['entity']->label());
        $this->assertEquals($this->testAutocreateUser
            ->id(), $value[1]['entity']->getOwnerId());
        // Third value is an existing entity.
        $this->assertEquals($this->referencedEntities[1]
            ->id(), $value[2]['target_id']);
        // Test the 'single_string_id' element.
        $this->assertEquals($this->referencedEntities[2]
            ->id(), $form_state->getValue('single_string_id'));
        // Test the 'tags_string_id' element.
        $expected = [
            [
                'target_id' => $this->referencedEntities[2]
                    ->id(),
            ],
            [
                'target_id' => $this->referencedEntities[3]
                    ->id(),
            ],
        ];
        $this->assertEquals($expected, $form_state->getValue('tags_string_id'));
        // Test the 'single_name_0' element.
        $this->assertEquals($this->referencedEntities[4]
            ->id(), $form_state->getValue('single_name_0'));
    }
    
    /**
     * Tests invalid entries in the EntityAutocomplete Form API element.
     */
    public function testInvalidEntityAutocompleteElement() : void {
        $form_builder = $this->container
            ->get('form_builder');
        // Test 'single' with an entity label that doesn't exist
        $form_state = (new FormState())->setValues([
            'single' => 'single - non-existent label',
        ]);
        $form_builder->submitForm($this, $form_state);
        $this->assertCount(1, $form_state->getErrors());
        $this->assertEquals('There are no test entity entities matching "single - non-existent label".', $form_state->getErrors()['single']);
        // Test 'single' with an entity ID that doesn't exist.
        $form_state = (new FormState())->setValues([
            'single' => 'single - non-existent label (42)',
        ]);
        $form_builder->submitForm($this, $form_state);
        $this->assertCount(1, $form_state->getErrors());
        $this->assertEquals('The referenced entity (entity_test: 42) does not exist.', $form_state->getErrors()['single']);
        // Do the same tests as above but on an element with '#validate_reference'
        // set to FALSE.
        $form_state = (new FormState())->setValues([
            'single_no_validate' => 'single - non-existent label',
            'single_autocreate_no_validate' => 'single - autocreate non-existent label',
        ]);
        $form_builder->submitForm($this, $form_state);
        // The element without 'autocreate' support still has to emit a warning when
        // the input doesn't end with an entity ID enclosed in parentheses.
        $this->assertCount(1, $form_state->getErrors());
        $this->assertEquals('There are no test entity entities matching "single - non-existent label".', $form_state->getErrors()['single_no_validate']);
        $form_state = (new FormState())->setValues([
            'single_no_validate' => 'single - non-existent label (42)',
            'single_autocreate_no_validate' => 'single - autocreate non-existent label (43)',
        ]);
        $form_builder->submitForm($this, $form_state);
        // The input is complete (i.e. contains an entity ID at the end), no errors
        // are triggered.
        $this->assertCount(0, $form_state->getErrors());
    }
    
    /**
     * Tests that access is properly checked by the EntityAutocomplete element.
     */
    public function testEntityAutocompleteAccess() : void {
        $form_builder = $this->container
            ->get('form_builder');
        $form = $form_builder->getForm($this);
        // Check that the current user has proper access to view entity labels.
        $expected = $this->referencedEntities[0]
            ->label() . ' (' . $this->referencedEntities[0]
            ->id() . ')';
        $this->assertEquals($expected, $form['single_access']['#value']);
        $expected .= ', ' . $this->referencedEntities[1]
            ->label() . ' (' . $this->referencedEntities[1]
            ->id() . ')';
        $this->assertEquals($expected, $form['tags_access']['#value']);
        // Set up a non-admin user that is *not* allowed to view test entities.
        \Drupal::currentUser()->setAccount($this->createUser());
        // Rebuild the form.
        $form = $form_builder->getForm($this);
        $expected = '- Restricted access - (' . $this->referencedEntities[0]
            ->id() . ')';
        $this->assertEquals($expected, $form['single_access']['#value']);
        $expected .= ', - Restricted access - (' . $this->referencedEntities[1]
            ->id() . ')';
        $this->assertEquals($expected, $form['tags_access']['#value']);
    }
    
    /**
     * Tests ID input is handled correctly.
     *
     * E.g. This can happen with GET form parameters.
     */
    public function testEntityAutocompleteIdInput() : void {
        
        /** @var \Drupal\Core\Form\FormBuilderInterface $form_builder */
        $form_builder = $this->container
            ->get('form_builder');
        // $form = $form_builder->getForm($this);
        $form_state = (new FormState())->setMethod('GET')
            ->setValues([
            'single' => [
                [
                    'target_id' => $this->referencedEntities[0]
                        ->id(),
                ],
            ],
            'single_no_validate' => [
                [
                    'target_id' => $this->referencedEntities[0]
                        ->id(),
                ],
            ],
        ]);
        $form_builder->submitForm($this, $form_state);
        $form = $form_state->getCompleteForm();
        $expected_label = $this->getAutocompleteInput($this->referencedEntities[0]);
        $this->assertSame($expected_label, $form['single']['#value']);
        $this->assertSame($expected_label, $form['single_no_validate']['#value']);
    }
    
    /**
     * Returns an entity label in format needed by the EntityAutocomplete element.
     *
     * @param \Drupal\Core\Entity\EntityInterface $entity
     *   A Drupal entity.
     *
     * @return string
     *   A string that can be used as a value for EntityAutocomplete elements.
     */
    protected function getAutocompleteInput(EntityInterface $entity) {
        return EntityAutocomplete::getEntityLabels([
            $entity,
        ]);
    }

}