ifthenelse-8.x-1.x-dev-no-core/modules/contrib/if_then_else/src/core/Nodes/Actions/SetFieldDefaultValue/SetFieldDefaultValue.php

<?php

namespace Drupal\if_then_else\core\Nodes\Actions\SetFieldDefaultValue;

use Drupal\if_then_else\core\Nodes\Actions\Action;
use Drupal\if_then_else\Event\NodeSubscriptionEvent;
use Drupal\if_then_else\Event\NodeValidationEvent;

/**
 * Class defined to execute make fields required action node.
 */
class SetFieldDefaultValue extends Action {

  /**
   * Return name of node.
   */
  public static function getName() {
    return 'set_form_field_default_value_action';
  }

  /**
   * Event subscriber for register set field value node.
   */
  public function registerNode(NodeSubscriptionEvent $event) {
    // Fetch all fields for config entity bundles.
    $if_then_else_utilities = \Drupal::service('ifthenelse.utilities');
    $form_entity_info = $if_then_else_utilities->getContentEntitiesAndBundles();
    $form_fields = $if_then_else_utilities->getFieldsByEntityBundleId($form_entity_info);
    $field_entity = $if_then_else_utilities->getEntityByFieldName($form_fields);
    $fields_type = $if_then_else_utilities->getFieldsByEntityBundleId($form_entity_info, 'field_type');

    $event->nodes[static::getName()] = [
      'label' => t('Set Default Form Field Value'),
      'type' => 'action',
      'class' => 'Drupal\\if_then_else\\core\\Nodes\\Actions\\SetFieldDefaultValue\\SetFieldDefaultValue',
      'library' => 'if_then_else/SetFieldDefaultValue',
      'control_class_name' => 'FieldDefaultValueControl',
      'form_fields' => $form_fields,
      'form_fields_type' => $fields_type,
      'field_entity_bundle' => $field_entity,
      'component_class_name' => 'SetFormDefaultFieldValueActionComponent',
      'inputs' => [
        'form' => [
          'label' => t('Form'),
          'description' => t('Form object.'),
          'sockets' => ['form'],
          'required' => TRUE,
        ],
        'form_state' => [
          'label' => t('Form State'),
          'description' => t('Form state object.'),
          'sockets' => ['form_state'],
          'required' => TRUE,
        ],
        'field_value' => [
          'label' => t('Field value'),
          'description' => t('Entity for setting field value'),
          'sockets' => ['string','number','object.entity'],
        ]
      ],
    ];
  }

  /**
   * Validation function.
   */
  public function validateNode(NodeValidationEvent $event) {
    $inputs = $event->node->inputs;
    if (!sizeof($inputs->field_value->connections)) {
      $event->errors[] = t('Provide a default value to field value socket in "@node_name".', ['@node_name' => $event->node->name]);
    }  
  }

  /**
   * Process function for set default value node.
   */
  public function process() {
    $this->setValueOfField();
  }

  /**
   * Set field value.
   */
  private function setValueOfField() {
    $form_fields = $this->data->form_fields;
    $form = &$this->inputs['form'];
    $field_input = $this->inputs['field_value'];
    $field_type = $this->data->field_type;
    $form_state = $this->inputs['form_state'];
    
    // Check if current form is add form or not
    if($form_state->getBuildInfo()['callback_object']->getEntity()->isNew()){
      switch ($field_type) {
        case 'string':
        case 'email':      
        case 'decimal':
        case 'float':
        case 'integer':
        case 'string_long':
          if(isset($field_input) && !empty($field_input) && $field_input != null){
            $form[$form_fields->code]['widget'][0]['value']['#default_value'] = $field_input;
          }
          break;
  
        case 'list_float':
        case 'list_integer':
        case 'list_string':
          if(isset($field_input) && !empty($field_input) && $field_input != null){
            $form[$form_fields->code]['widget']['#default_value'][0] = $field_input;
          }
          break;
  
        case 'text':
        case 'text_long':
          if(isset($field_input) && !empty($field_input) && $field_input != null){
            $form[$form_fields->code]['widget'][0]['#default_value'] = $field_input->value;
            $form[$form_fields->code]['widget'][0]['#format'] = $field_input->format;
          }
          break;
  
        case 'datetime':
          if(isset($field_input) && !empty($field_input) && $field_input != null){
            $form[$form_fields->code]['widget'][0]['value']['#default_value'] = new \Drupal\Core\Datetime\DrupalDateTime($field_input);;
          }
          break;
  
        case 'boolean':
          if(isset($field_input) && !empty($field_input) && $field_input != null){
            $form[$form_fields->code]['widget']['value']['#default_value'] = $field_input;
          }
          break;
  
        case 'entity_reference':
          if(isset($field_input) && !empty($field_input) && $field_input != null){
            if (isset($form[$form_fields->code]['widget'][0]['target_id'])) {
              if($form[$form_fields->code]['widget'][0]['target_id']['#target_type'] == 'node'){
                $form[$form_fields->code]['widget'][0]['target_id']['#default_value'] = \Drupal\node\Entity\Node::load($field_input);
              }else if($form[$form_fields->code]['widget'][0]['target_id']['#target_type'] == 'taxonomy_term'){
                $form[$form_fields->code]['widget'][0]['target_id']['#default_value'] = \Drupal\taxonomy\Entity\Term::load($field_input);
              }else if($form[$form_fields->code]['widget'][0]['target_id']['#target_type'] == 'user'){
                $form[$form_fields->code]['widget'][0]['target_id']['#default_value'] = \Drupal\user\Entity\User::load($field_input);
              }
            }
            else {
              $form[$form_fields->code]['widget']['target_id']['#default_value'][0] = \Drupal\taxonomy\Entity\Term::load($field_input);
            }
          }
          break;
  
        case 'text_with_summary':
          if(isset($field_input) && !empty($field_input) && $field_input != null){
            $form[$form_fields->code]['widget'][0]['#default_value'] = $field_input->value;
            $form[$form_fields->code]['widget'][0]['summary']['#default_value'] = $field_input->summary;
            $form[$form_fields->code]['widget'][0]['#format'] = $field_input->format;
          }
          break;
  
        case 'image':
          if(isset($field_input) && !empty($field_input) && $field_input != null){
            $form[$form_fields->code]['widget'][0]['#default_value']['target_id'] = $field_input->fids;
            $form[$form_fields->code]['widget'][0]['#default_value']['alt'] = $field_input->alt;
            $form[$form_fields->code]['widget'][0]['#default_value']['title'] = $field_input->title;
            $form[$form_fields->code]['widget'][0]['#default_value']['fids'][0] = $field_input->fids;
            $form[$form_fields->code]['widget'][0]['#default_value']['description'] = $field_input->description;
            $form[$form_fields->code]['widget'][0]['#default_value']['width'] = $field_input->width;
            $form[$form_fields->code]['widget'][0]['#default_value']['height'] = $field_input->height;
          }
          break;
  
        case 'link':
          if(isset($field_input) && !empty($field_input) && $field_input != null){
            $form[$form_fields->code]['widget'][0]['uri']['#default_value'] = $field_input->uri;
            $form[$form_fields->code]['widget'][0]['title']['#default_value'] = $field_input->title;
          }
          break;
      }
    }
  }

}