class MaestroSpawnSubFlowTask in Maestro 3.x

Same name and namespace in other branches

8.2 src/Plugin/EngineTasks/MaestroSpawnSubFlowTask.php \Drupal\maestro\Plugin\EngineTasks\MaestroSpawnSubFlowTask

Maestro Spawn Sub Flow Task Plugin.

The plugin annotations below should include: id: The task type ID for this task. For Maestro tasks, this is Maestro[TaskType]. So for example, the start task shipped by Maestro is MaestroStart. The Maestro End task has an id of MaestroEnd Those task IDs are what's used in the engine when a task is injected into the queue.

Plugin annotation


@Plugin(
  id = "MaestroSpawnSubFlow",
  task_description = @Translation("The Maestro Engine's Spawn Sub Flow Task."),
)

Hierarchy

class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
- class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
  - class \Drupal\maestro\Plugin\EngineTasks\MaestroSpawnSubFlowTask implements MaestroEngineTaskInterface uses MaestroTaskTrait

Expanded class hierarchy of MaestroSpawnSubFlowTask

File

src/Plugin/EngineTasks/MaestroSpawnSubFlowTask.php, line 28

Namespace

Drupal\maestro\Plugin\EngineTasks

View source

class MaestroSpawnSubFlowTask extends PluginBase implements MaestroEngineTaskInterface {
  use MaestroTaskTrait;

  /**
   * Constructor.
   */
  public function __construct($configuration = NULL) {
    if (is_array($configuration)) {
      $this->processID = $configuration[0];
      $this->queueID = $configuration[1];
    }
  }

  /**
   * {@inheritDoc}
   */
  public function isInteractive() {
    return FALSE;
  }

  /**
   * {@inheritDoc}
   */
  public function shortDescription() {
    return t('Spawn Sub Flow');
  }

  /**
   * {@inheritDoc}
   */
  public function description() {
    return $this
      ->t('Spawn Sub Flow.');
  }

  /**
   * {@inheritDoc}
   *
   * @see \Drupal\Component\Plugin\PluginBase::getPluginId()
   */
  public function getPluginId() {
    return 'MaestroSpawnSubFlow';
  }

  /**
   * {@inheritDoc}
   */
  public function getTaskColours() {
    return '#707070';
  }

  /**
   * {@inheritdoc}
   */
  public function getExecutableForm($modal, MaestroExecuteInteractive $parent) {
  }

  /**
   * {@inheritdoc}
   */
  public function handleExecuteSubmit(array &$form, FormStateInterface $form_state) {
  }

  /**
   * Part of the ExecutableInterface
   * Execution of the Sub Flow task will create a new process and push all selected parent variables to the newly spawned
   * sub process.  The variables pushed to the sub process will be prefixed with "maestro_parent_" and will also include a new
   * variable named "parent_process_id" which will store the process ID of the parent.
   * {@inheritdoc}.
   */
  public function execute() {
    $templateMachineName = MaestroEngine::getTemplateIdFromProcessId($this->processID);
    $taskMachineName = MaestroEngine::getTaskIdFromQueueId($this->queueID);
    $task = MaestroEngine::getTemplateTaskByID($templateMachineName, $taskMachineName);
    $spawnTemplate = $task['data']['maestro_template'];
    $variables = [];
    if (isset($task['data']['variables'])) {
      $variables = $task['data']['variables'];
    }

    // Let's first start by adding in the new process ID.
    $maestro = new MaestroEngine();
    $newProcessID = $maestro
      ->newProcess($spawnTemplate);
    if ($newProcessID !== FALSE) {

      // first, create the parent process ID variable.
      $values = [
        'process_id' => $newProcessID,
        'variable_name' => 'maestro_parent_process_id',
        'variable_value' => $this->processID,
      ];
      $new_var = \Drupal::entityTypeManager()
        ->getStorage('maestro_process_variables')
        ->create($values);
      $new_var
        ->save();
      if (!$new_var
        ->id()) {

        // Throw a maestro exception
        // completion should technically end here for this initiation.
        throw new MaestroSaveEntityException('maestro_process_variable', $values['variable_name'] . ' failed saving during new process creation.');
      }
      foreach ($variables as $machine_name => $checked_value) {
        if ($machine_name != '') {

          // We now populate the new process with variables.
          $parent_value = MaestroEngine::getProcessVariable($machine_name, $this->processID);
          $values = [
            'process_id' => $newProcessID,
            'variable_name' => 'maestro_parent_' . $machine_name,
            'variable_value' => $parent_value,
          ];
          $new_var = \Drupal::entityTypeManager()
            ->getStorage('maestro_process_variables')
            ->create($values);
          $new_var
            ->save();
          if (!$new_var
            ->id()) {

            // Throw a maestro exception
            // completion should technically end here for this initiation.
            throw new MaestroSaveEntityException('maestro_process_variable', $values['variable_name'] . ' failed saving during new process creation.');
          }
          $parent_value = '';
        }
      }
      return TRUE;
    }
    else {
      \Drupal::logger('maestro')
        ->error('Unable to spawn sub process.  Process spawn returned an error.');
      return FALSE;
    }
  }

  /**
   * {@inheritdoc}
   */
  public function getTaskEditForm(array $task, $templateMachineName) {
    $form = [
      '#markup' => t('Spawn Sub Flow Edit'),
    ];
    $maestro_templates = MaestroEngine::getTemplates();
    $templates = [];
    $templates['none'] = $this
      ->t('Please Select Template');
    foreach ($maestro_templates as $machine_name => $template) {
      $templates[$machine_name] = $template
        ->label();
    }
    $form['maestro_task_machine_name'] = [
      '#type' => 'hidden',
      '#value' => $task['id'],
    ];
    $form['maestro_template_machine_name'] = [
      '#type' => 'hidden',
      '#value' => $templateMachineName,
    ];
    $selected_template = '';
    if (isset($task['data']['maestro_template'])) {
      $selected_template = $task['data']['maestro_template'];
    }
    $form['maestro_template'] = [
      '#type' => 'select',
      '#options' => $templates,
      '#title' => $this
        ->t('Choose the Maestro Template'),
      '#default_value' => $selected_template,
      '#required' => TRUE,
      '#ajax' => [
        'callback' => [
          $this,
          'subFlowChoiceHandlerCallback',
        ],
        'event' => 'change',
        'wrapper' => 'handler-ajax-refresh-wrapper',
        'progress' => [
          'type' => 'throbber',
          'message' => NULL,
        ],
      ],
    ];
    $template_machine_name = $selected_template;
    $form_state_template = $task['form_state']
      ->getValue('maestro_template');
    if (isset($form_state_template)) {
      $template_machine_name = $form_state_template;
    }
    if ($template_machine_name != 'none' && $template_machine_name != '') {
      $template = MaestroEngine::getTemplate($template_machine_name);
      $form['maestro_sub_flow_label'] = [
        '#type' => 'link',
        '#title' => $this
          ->t('Chosen Template') . ': ' . $template
          ->label(),
        '#url' => Url::fromRoute('maestro_template_builder', [
          'templateMachineName' => $template_machine_name,
        ]),
        '#attributes' => [
          'class' => [
            'handler-help-message',
          ],
          'target' => '_new',
          'id' => [
            'handler-ajax-refresh-wrapper',
          ],
        ],
      ];
    }
    else {
      $form['maestro_sub_flow_label'] = [
        '#type' => 'html_tag',
        '#tag' => 'div',
        '#value' => $this
          ->t('Please choose a template.'),
        '#attributes' => [
          'class' => [
            'handler-help-message',
          ],
          'id' => [
            'handler-ajax-refresh-wrapper',
          ],
        ],
      ];
    }
    $form['maestro_sub_flow_settings'] = [
      '#type' => 'details',
      '#open' => TRUE,
      '#description' => $this
        ->t('Choose the variables you wish to send from the parent to the child. Variables will be prefixed with "maestro_parent_" when injected into the sub-process.'),
      '#title' => $this
        ->t('Variable Selection'),
    ];
    $template = MaestroEngine::getTemplate($templateMachineName);
    $form['maestro_sub_flow_settings']['variables'] = [];

    // Get all variables other than some of the exclusive Maestro variables.
    foreach ($template->variables as $var_name => $var_definition) {
      $form['maestro_sub_flow_settings']['variables']['variable_' . $var_name] = [
        '#type' => 'checkbox',
        '#title' => $var_name,
        '#default_value' => @array_key_exists($var_name, $task['data']['variables']) ? TRUE : FALSE,
        '#attributes' => [
          'autocomplete' => 'off',
        ],
      ];
    }
    $form['#cache'] = [
      'max-age' => 0,
    ];

    // Hi Firefox, I see you caching.
    $form['#attributes']['autocomplete'] = 'off';
    return $form;
  }

  /**
   * Implements callback for Ajax event on objective selection.
   *
   * @param array $form
   *   From render array.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   Current state of form.
   *
   * @return array
   *   Objective selection section of the form.
   */
  public function subFlowChoiceHandlerCallback(array $form, FormStateInterface &$form_state) {
    return $form['maestro_sub_flow_label'];
  }

  /**
   * {@inheritDoc}
   */
  public function validateTaskEditForm(array &$form, FormStateInterface $form_state) {
    $template = $form_state
      ->getValue('maestro_template');

    // Let's validate the handler here to ensure that it actually exists.
    if ($template == 'none') {
      $form_state
        ->setErrorByName('maestro_template', $this
        ->t('You must choose a template.'));
    }
  }

  /**
   * {@inheritDoc}
   */
  public function prepareTaskForSave(array &$form, FormStateInterface $form_state, array &$task) {
    $task['data']['maestro_template'] = $form_state
      ->getValue('maestro_template');

    // Now handle the variables.
    unset($task['data']['variables']);
    $all_values = $form_state
      ->getValues();
    foreach ($all_values as $key => $var) {
      if (strpos($key, 'variable_') === 0) {

        // Starts with 'variable_',so we know this is our variables.
        $is_checked = $form_state
          ->getValue($key);
        if ($is_checked) {

          // Strip of "variable_".
          $varname = substr($key, 9);

          // Signal that it's checked.
          $task['data']['variables'][$varname] = 1;
        }
      }
    }
  }

  /**
   * {@inheritDoc}
   */
  public function performValidityCheck(array &$validation_failure_tasks, array &$validation_information_tasks, array $task) {

    // So we know that we need a few keys in this $task array to even have a batch function run properly.
    // namely the handler.
    if (array_key_exists('maestro_template', $task['data']) && $task['data']['maestro_template'] == '' || !array_key_exists('maestro_template', $task['data'])) {
      $validation_failure_tasks[] = [
        'taskID' => $task['id'],
        'taskLabel' => $task['label'],
        'reason' => t('This task requires a Maestro Template to be chosen.'),
      ];
    }
  }

  /**
   * {@inheritDoc}
   */
  public function getTemplateBuilderCapabilities() {
    return [
      'edit',
      'drawlineto',
      'removelines',
      'remove',
    ];
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DependencySerializationTrait::$_entityStorages	protected	property
DependencySerializationTrait::$_serviceIds	protected	property
DependencySerializationTrait::__sleep	public	function		2
DependencySerializationTrait::__wakeup	public	function		2
MaestroSpawnSubFlowTask::description	public	function	Longer description. This generally follows the short Description but can be used to be more descriptive if you wish to surface this description in a UI element. Overrides MaestroEngineTaskInterface::description
MaestroSpawnSubFlowTask::execute	public	function	Part of the ExecutableInterface Execution of the Sub Flow task will create a new process and push all selected parent variables to the newly spawned sub process. The variables pushed to the sub process will be prefixed with… Overrides ExecutableInterface::execute
MaestroSpawnSubFlowTask::getExecutableForm	public	function	Gets the Maestro executable form for a task console. Overrides MaestroEngineTaskInterface::getExecutableForm
MaestroSpawnSubFlowTask::getPluginId	public	function	Overrides PluginBase::getPluginId
MaestroSpawnSubFlowTask::getTaskColours	public	function	Returns the task's defined colours. This is useful if you want to let the tasks decide on what colours to paint themselves in the UI. Overrides MaestroEngineTaskInterface::getTaskColours
MaestroSpawnSubFlowTask::getTaskEditForm	public	function	Method to allow a task to add their own fields to the task edit form. Overrides MaestroEngineTaskInterface::getTaskEditForm
MaestroSpawnSubFlowTask::getTemplateBuilderCapabilities	public	function	Returns an array of consistenly keyed array elements that define what this task can do in the template builder. Elements are: edit, drawlineto, drawfalselineto, removelines, remove. Overrides MaestroEngineTaskInterface::getTemplateBuilderCapabilities
MaestroSpawnSubFlowTask::handleExecuteSubmit	public	function	Interactive tasks, or tasks that signal themselves as requiring human interaction will have the resulting form submissions sent to their own handler for processing to determine if the task should be completed or not or to carry out any task processing… Overrides MaestroEngineTaskInterface::handleExecuteSubmit
MaestroSpawnSubFlowTask::isInteractive	public	function	Returns TRUE or FALSE to denote if this task has an interactive interface that needs to be shown in the Task Console and for any other requirements of the task. Overrides MaestroEngineTaskInterface::isInteractive
MaestroSpawnSubFlowTask::performValidityCheck	public	function	Lets the task perform validation on itself. If the task is missing any internal requirements, it can flag itself as having an issue. Return array MUST be in the format of array( 'taskID' => the task machine name, 'taskLabel'… Overrides MaestroEngineTaskInterface::performValidityCheck
MaestroSpawnSubFlowTask::prepareTaskForSave	public	function	The specific task's manipulation of the values to save for a template save. Overrides MaestroEngineTaskInterface::prepareTaskForSave
MaestroSpawnSubFlowTask::shortDescription	public	function	Get the task's short description. Useful for things like labels. Overrides MaestroEngineTaskInterface::shortDescription
MaestroSpawnSubFlowTask::subFlowChoiceHandlerCallback	public	function	Implements callback for Ajax event on objective selection.
MaestroSpawnSubFlowTask::validateTaskEditForm	public	function	This method must be called by the template builder in order to validate the form entry values before saving. Overrides MaestroEngineTaskInterface::validateTaskEditForm
MaestroSpawnSubFlowTask::__construct	public	function	Constructor. Overrides PluginBase::__construct
MaestroTaskTrait::$completionStatus	protected	property	Default will be that the task completed normally.
MaestroTaskTrait::$executionStatus	protected	property	The default will be success for the execution status.
MaestroTaskTrait::$processID	protected	property	The Maestro Process ID.
MaestroTaskTrait::$queueID	protected	property	The Maestro queue ID.
MaestroTaskTrait::getAssignmentsAndNotificationsForm	public	function	Retrieve the core Maestro form edit elements for Assignments and Notifications.
MaestroTaskTrait::getBaseEditForm	public	function	Retrieve the core Maestro form edit elements that all tasks MUST adhere to.
MaestroTaskTrait::getCompletionStatus	public	function	Returns the value of the completion status protected variable denoting any special completion status condition the task wishes to pass along.
MaestroTaskTrait::getExecutionStatus	public	function	Returns the value of the execution status protected variable denoting if the execution of this task is complete.
MaestroTaskTrait::saveTask	public	function	Available for all tasks -- this does the general task construction for us, ensuring we have sanity in the saved Config Entity for the task. Assignments and Notifications are the two main elements this method worries about.
MessengerTrait::$messenger	protected	property	The messenger.	27
MessengerTrait::messenger	public	function	Gets the messenger.	27
MessengerTrait::setMessenger	public	function	Sets the messenger.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	2
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	4
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	2
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.

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