business_rules-8.x-1.0-beta1/src/Plugin/BusinessRulesVariable/UserVariable.php

<?php

namespace Drupal\business_rules\Plugin\BusinessRulesVariable;

use Drupal\business_rules\Entity\Variable;
use Drupal\business_rules\Events\BusinessRulesEvent;
use Drupal\business_rules\ItemInterface;
use Drupal\business_rules\Plugin\BusinessRulesVariablePlugin;
use Drupal\business_rules\VariableObject;
use Drupal\business_rules\VariablesSet;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Link;
use Drupal\user\Entity\User;

/**
 * A variable representing one user account.
 *
 * @package Drupal\business_rules\Plugin\BusinessRulesVariable
 *
 * @BusinessRulesVariable(
 *   id = "user_variable",
 *   label = @Translation("User variable"),
 *   group = @Translation("User"),
 *   description = @Translation("Variable representing one user account."),
 *   isContextDependent = FALSE,
 *   hasTargetEntity = TRUE,
 *   hasTargetBundle = TRUE,
 * )
 */
class UserVariable extends BusinessRulesVariablePlugin {

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

    $settings['current_or_defined'] = [
      '#type'          => 'select',
      '#title'         => t('Current user or defined user?'),
      '#description'   => t('Current user or load user by user id.'),
      '#required'      => TRUE,
      '#options'       => [
        'current' => t('Current'),
        'defined' => t('Defined'),
      ],
      '#default_value' => $item->getSettings('current_or_defined'),
    ];

    $settings['user_id'] = [
      '#type'          => 'textfield',
      '#title'         => t('User id. You may use a variable to set this value.'),
      '#description'   => t('The numeric value for the user id.'),
      '#default_value' => $item->getSettings('user_id'),
      '#states'        => [
        'visible' => [
          'select[name="current_or_defined"]' => ['value' => 'defined'],
        ],
      ],
    ];

    return $settings;
  }

  /**
   * {@inheritdoc}
   */
  public function buildForm(array &$form, FormStateInterface $form_state) {
    $form['settings']['context']['target_entity_type']['#value']    = 'user';
    $form['settings']['context']['target_entity_type']['#options']  = [
      'user' => $form['settings']['context']['target_entity_type']['#options']['user'],
    ];
    $form['settings']['context']['target_entity_type']['#disabled'] = TRUE;

    $form['settings']['context']['target_bundle']['#options']  = ['user' => t('User')];
    $form['settings']['context']['target_bundle']['#value']    = 'user';
    $form['settings']['context']['target_bundle']['#disabled'] = TRUE;
  }

  /**
   * {@inheritdoc}
   */
  public function changeDetails(Variable $variable, array &$row) {
    // Show a link to a modal window which all fields from the Entity Variable.
    $content = $this->util->getVariableFieldsModalInfo($variable);
    $keyvalue = $this->util->getKeyValueExpirable('user_variable');
    $keyvalue->set('variableFields.' . $variable->id(), $content);

    $details_link = Link::createFromRoute(t('Click here to see the entity fields'),
      'business_rules.ajax.modal',
      [
        'method'     => 'nojs',
        'title'      => t('Entity fields'),
        'collection' => 'user_variable',
        'key'        => 'variableFields.' . $variable->id(),
      ],
      [
        'attributes' => [
          'class' => ['use-ajax'],
        ],
      ]
    )->toString();

    $row['description']['data']['#markup'] .= '<br>' . $details_link;

  }

  /**
   * {@inheritdoc}
   */
  public function processSettings(array $settings, ItemInterface $item) {
    if ($settings['current_or_defined'] == 'current') {
      unset($settings['user_id']);
    }

    return $settings;
  }

  /**
   * {@inheritdoc}
   */
  public function evaluate(Variable $variable, BusinessRulesEvent $event) {

    $user = NULL;

    if ($variable->getSettings('current_or_defined') == 'current') {
      // Get the current user.
      $account = $this->util->container->get('current_user');
      $user    = User::load($account->id());
    }
    elseif ($variable->getSettings('current_or_defined') == 'defined') {
      // Load user by id.
      $user_id = $variable->getSettings('user_id');
      $user_id = $this->processVariables($user_id, $event->getArgument('variables'));
      $user    = User::load($user_id);

      // Add log error if user id not found.
      if (empty($user)) {
        $this->util->logger->error('User id: $id not found. Variable: %variable', [
          '%id'       => $user_id,
          '%variable' => $variable->id(),
        ]);
      }
    }

    $variableSet = new VariablesSet();

    // Prepare the user fields to be used as variables.
    if ($user instanceof User) {
      $variableObject = new VariableObject($variable->id(), $user, $variable->getType());
      $variableSet->append($variableObject);

      $fields = $this->util->entityFieldManager->getFieldDefinitions($variable->getTargetEntityType(), $variable->getTargetBundle());

      foreach ($fields as $field_name => $field_storage) {
        $variableObject = new VariableObject($variable->id() . '->' . $field_name, $user->get($field_name)->value, $variable->getType());
        $variableSet->append($variableObject);
      }
    }

    return $variableSet;
  }

}