--- /dev/null
+<?php
+
+namespace Drupal\ctools\Form;
+
+
+use Drupal\Core\Ajax\AjaxResponse;
+use Drupal\Core\Ajax\CloseModalDialogCommand;
+use Drupal\Core\Ajax\RedirectCommand;
+use Drupal\Core\Entity\Entity;
+use Drupal\Core\Entity\Plugin\DataType\EntityAdapter;
+use Drupal\Core\Form\FormBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Plugin\Context\Context;
+use Drupal\Core\Plugin\Context\ContextDefinition;
+use Drupal\Core\Plugin\Context\ContextInterface;
+use Drupal\Core\Url;
+use Drupal\user\SharedTempStoreFactory;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+abstract class ContextConfigure extends FormBase {
+
+ /**
+ * @var \Drupal\user\SharedTempStoreFactory
+ */
+ protected $tempstore;
+
+ /**
+ * @var string
+ */
+ protected $tempstore_id;
+
+ /**
+ * @var string;
+ */
+ protected $machine_name;
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container) {
+ return new static($container->get('user.shared_tempstore'));
+ }
+
+ function __construct(SharedTempStoreFactory $tempstore) {
+ $this->tempstore = $tempstore;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getFormId() {
+ return 'ctools_context_configure';
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildForm(array $form, FormStateInterface $form_state, $context_id = NULL, $tempstore_id = NULL, $machine_name = NULL) {
+ $this->tempstore_id = $tempstore_id;
+ $this->machine_name = $machine_name;
+ $cached_values = $this->tempstore->get($this->tempstore_id)->get($this->machine_name);
+ $contexts = $this->getContexts($cached_values);
+ $edit = FALSE;
+ if (!empty($contexts[$context_id])) {
+ $context = $contexts[$context_id];
+ $machine_name = $context_id;
+ $edit = TRUE;
+ }
+ else {
+ $context_definition = new ContextDefinition($context_id);
+ $context = new Context($context_definition);
+ $machine_name = '';
+ }
+ $label = $context->getContextDefinition()->getLabel();
+ $description = $context->getContextDefinition()->getDescription();
+ $data_type = $context->getContextDefinition()->getDataType();
+ $form['#attached']['library'][] = 'core/drupal.dialog.ajax';
+ $form['context_id'] = [
+ '#type' => 'value',
+ '#value' => $context_id
+ ];
+ $form['label'] = [
+ '#type' => 'textfield',
+ '#title' => $this->t('Label'),
+ '#default_value' => $label,
+ '#required' => TRUE,
+ ];
+ $form['machine_name'] = [
+ '#type' => 'machine_name',
+ '#title' => $this->t('Machine Name'),
+ '#default_value' => $machine_name,
+ '#required' => TRUE,
+ '#maxlength' => 128,
+ '#machine_name' => [
+ 'source' => ['label'],
+ 'exists' => [$this, 'contextExists'],
+ ],
+ '#disabled' => $this->disableMachineName($cached_values, $machine_name),
+ ];
+ $form['description'] = [
+ '#type' => 'textarea',
+ '#title' => $this->t('Description'),
+ '#default_value' => $description,
+ ];
+ if (strpos($data_type, 'entity:') === 0) {
+ list(, $entity_type) = explode(':', $data_type);
+ /** @var EntityAdapter $entity */
+ $entity = $edit ? $context->getContextValue() : NULL;
+ $form['context_value'] = [
+ '#type' => 'entity_autocomplete',
+ '#required' => TRUE,
+ '#target_type' => $entity_type,
+ '#default_value' => $entity,
+ '#title' => $this->t('Select entity'),
+ ];
+ }
+ else {
+ $value = $context->getContextData()->getValue();
+ $form['context_value'] = [
+ '#title' => $this->t('Set a context value'),
+ '#type' => 'textfield',
+ '#required' => TRUE,
+ '#default_value' => $value,
+ ];
+ }
+ $form['submit'] = [
+ '#type' => 'submit',
+ '#value' => $this->t('Save'),
+ '#ajax' => [
+ 'callback' => [$this, 'ajaxSave'],
+ ]
+ ];
+ return $form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function validateForm(array &$form, FormStateInterface $form_state) {
+ // If these are not equal, then we're adding a new context and should not override an existing context.
+ if ($form_state->getValue('machine_name') != $form_state->getValue('context_id')) {
+ $machine_name = $form_state->getValue('machine_name');
+ $cached_values = $this->tempstore->get($this->tempstore_id)->get($this->machine_name);
+ if (!empty($this->getContexts($cached_values)[$machine_name])) {
+ $form_state->setError($form['machine_name'], $this->t('That machine name is in use by another context definition.'));
+ }
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitForm(array &$form, FormStateInterface $form_state) {
+ $cached_values = $this->tempstore->get($this->tempstore_id)->get($this->machine_name);
+ $contexts = $this->getContexts($cached_values);
+ if ($form_state->getValue('machine_name') != $form_state->getValue('context_id')) {
+ $data_type = $form_state->getValue('context_id');
+ $context_definition = new ContextDefinition($data_type, $form_state->getValue('label'), TRUE, FALSE, $form_state->getValue('description'));
+ }
+ else {
+ $context = $contexts[$form_state->getValue('machine_name')];
+ $context_definition = $context->getContextDefinition();
+ $context_definition->setLabel($form_state->getValue('label'));
+ $context_definition->setDescription($form_state->getValue('description'));
+ }
+ // We're dealing with an entity and should make sure it's loaded.
+ if (strpos($context_definition->getDataType(), 'entity:') === 0) {
+ list(, $entity_type) = explode(':', $context_definition->getDataType());
+ if (is_numeric($form_state->getValue('context_value'))) {
+ $value = \Drupal::entityTypeManager()->getStorage($entity_type)->load($form_state->getValue('context_value'));
+ }
+ }
+ // No loading required for non-entity values.
+ else {
+ $value = $form_state->getValue('context_value');
+ }
+ $context = new Context($context_definition, $value);
+
+ $cached_values = $this->addContext($cached_values, $form_state->getValue('machine_name'), $context);
+ $this->tempstore->get($this->tempstore_id)->set($this->machine_name, $cached_values);
+ list($route_name, $route_parameters) = $this->getParentRouteInfo($cached_values);
+ $form_state->setRedirect($route_name, $route_parameters);
+ }
+
+ public function ajaxSave(array &$form, FormStateInterface $form_state) {
+ $response = new AjaxResponse();
+ $cached_values = $this->tempstore->get($this->tempstore_id)->get($this->machine_name);
+ list($route_name, $route_parameters) = $this->getParentRouteInfo($cached_values);
+ $url = new Url($route_name, $route_parameters);
+ $response->addCommand(new RedirectCommand($url->toString()));
+ $response->addCommand(new CloseModalDialogCommand());
+ return $response;
+ }
+
+ /**
+ * Document the route name and parameters for redirect after submission.
+ *
+ * @param $cached_values
+ *
+ * @return array
+ * In the format of
+ * return ['route.name', ['machine_name' => $this->machine_name, 'step' => 'step_name]];
+ */
+ abstract protected function getParentRouteInfo($cached_values);
+
+ /**
+ * Custom logic for retrieving the contexts array from cached_values.
+ *
+ * @param $cached_values
+ *
+ * @return \Drupal\Core\Plugin\Context\ContextInterface[]
+ */
+ abstract protected function getContexts($cached_values);
+
+ /**
+ * Custom logic for adding a context to the cached_values contexts array.
+ *
+ * @param array $cached_values
+ * The cached_values currently in use.
+ * @param string $context_id
+ * The context identifier.
+ * @param \Drupal\Core\Plugin\Context\ContextInterface $context
+ * The context to add or update within the cached values.
+ *
+ * @return mixed
+ * Return the $cached_values
+ */
+ abstract protected function addContext($cached_values, $context_id, ContextInterface $context);
+
+ /**
+ * Custom "exists" logic for the context to be created.
+ *
+ * @param string $value
+ * The name of the context.
+ * @param $element
+ * The machine_name element
+ * @param \Drupal\Core\Form\FormStateInterface $form_state
+ * The form state.
+ *
+ * @return bool
+ * Return true if a context of this name exists.
+ */
+ abstract public function contextExists($value, $element, $form_state);
+
+ /**
+ * Determines if the machine_name should be disabled.
+ *
+ * @param $cached_values
+ *
+ * @return bool
+ */
+ abstract protected function disableMachineName($cached_values, $machine_name);
+
+}