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<?php
namespace Drupal\image\Form;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Form\SubformState;
use Drupal\image\ConfigurableImageEffectInterface;
use Drupal\image\ImageStyleInterface;
use Drupal\Component\Plugin\Exception\PluginNotFoundException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
/**
* Provides a base form for image effects.
*/
abstract class ImageEffectFormBase extends FormBase {
/**
* The image style.
*
* @var \Drupal\image\ImageStyleInterface
*/
protected $imageStyle;
/**
* The image effect.
*
* @var \Drupal\image\ImageEffectInterface|\Drupal\image\ConfigurableImageEffectInterface
*/
protected $imageEffect;
/**
* {@inheritdoc}
*/
public function getFormId() {
return 'image_effect_form';
}
/**
* {@inheritdoc}
*
* @param \Drupal\image\ImageStyleInterface $image_style
* The image style.
* @param string $image_effect
* The image effect ID.
*
* @return array
* The form structure.
*
* @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
*/
public function buildForm(array $form, FormStateInterface $form_state, ImageStyleInterface $image_style = NULL, $image_effect = NULL) {
$this->imageStyle = $image_style;
try {
$this->imageEffect = $this->prepareImageEffect($image_effect);
}
catch (PluginNotFoundException $e) {
throw new NotFoundHttpException("Invalid effect id: '$image_effect'.");
}
$request = $this->getRequest();
if (!($this->imageEffect instanceof ConfigurableImageEffectInterface)) {
throw new NotFoundHttpException();
}
$form['#attached']['library'][] = 'image/admin';
$form['uuid'] = [
'#type' => 'value',
'#value' => $this->imageEffect->getUuid(),
];
$form['id'] = [
'#type' => 'value',
'#value' => $this->imageEffect->getPluginId(),
];
$form['data'] = [];
$subform_state = SubformState::createForSubform($form['data'], $form, $form_state);
$form['data'] = $this->imageEffect->buildConfigurationForm($form['data'], $subform_state);
$form['data']['#tree'] = TRUE;
// Check the URL for a weight, then the image effect, otherwise use default.
$form['weight'] = [
'#type' => 'hidden',
'#value' => $request->query->has('weight') ? (int) $request->query->get('weight') : $this->imageEffect->getWeight(),
];
$form['actions'] = ['#type' => 'actions'];
$form['actions']['submit'] = [
'#type' => 'submit',
'#button_type' => 'primary',
];
$form['actions']['cancel'] = [
'#type' => 'link',
'#title' => $this->t('Cancel'),
'#url' => $this->imageStyle->urlInfo('edit-form'),
'#attributes' => ['class' => ['button']],
];
return $form;
}
/**
* {@inheritdoc}
*/
public function validateForm(array &$form, FormStateInterface $form_state) {
// The image effect configuration is stored in the 'data' key in the form,
// pass that through for validation.
$this->imageEffect->validateConfigurationForm($form['data'], SubformState::createForSubform($form['data'], $form, $form_state));
}
/**
* {@inheritdoc}
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
$form_state->cleanValues();
// The image effect configuration is stored in the 'data' key in the form,
// pass that through for submission.
$this->imageEffect->submitConfigurationForm($form['data'], SubformState::createForSubform($form['data'], $form, $form_state));
$this->imageEffect->setWeight($form_state->getValue('weight'));
if (!$this->imageEffect->getUuid()) {
$this->imageStyle->addImageEffect($this->imageEffect->getConfiguration());
}
$this->imageStyle->save();
drupal_set_message($this->t('The image effect was successfully applied.'));
$form_state->setRedirectUrl($this->imageStyle->urlInfo('edit-form'));
}
/**
* Converts an image effect ID into an object.
*
* @param string $image_effect
* The image effect ID.
*
* @return \Drupal\image\ImageEffectInterface
* The image effect object.
*/
abstract protected function prepareImageEffect($image_effect);
}