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  <?php
namespace Drupal\organigrams\Form;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\taxonomy\Entity\Vocabulary;
use Drupal\taxonomy\Entity\Term;
use Drupal\Core\Link;
use Drupal\Core\Url;
class OrganigramsImportD7Form extends FormBase {
  
  public function getFormId() {
    return 'organigrams_import_drupal7_form';
  }
  
  public function buildForm(array $form, FormStateInterface $form_state) {
    
    $form['organigrams_d7_json'] = [
      '#type' => 'textarea',
      '#title' => $this
        ->t('Drupal 7 organigram JSON'),
      '#description' => '',
      '#required' => TRUE,
      '#rows' => 20,
    ];
    
    $form['actions'] = [
      '#type' => 'actions',
    ];
    
    $form['actions']['submit'] = [
      '#type' => 'submit',
      '#value' => $this
        ->t('Submit'),
    ];
    return $form;
  }
  
  public function validateForm(array &$form, FormStateInterface $form_state) {
    parent::validateForm($form, $form_state);
    $organigram = json_decode($form_state
      ->getValue('organigrams_d7_json'));
    if (empty($organigram->organigram)) {
      $form_state
        ->setErrorByName('organigrams_d7_json', $this
        ->t('No organigram found in the JSON.'));
    }
    else {
      $vocabularies = taxonomy_vocabulary_get_names();
      if (isset($vocabularies[$organigram->organigram->machine_name])) {
        $form_state
          ->setErrorByName('organigrams_d7_json', $this
          ->t('An organigram with the machine name "@machine_name" already exists. Change the machine name or remove the existing one to import this organigram.', [
          '@machine_name' => $organigram->organigram->machine_name,
        ]));
      }
    }
  }
  
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $organigram = json_decode($form_state
      ->getValue('organigrams_d7_json'));
    $vocabulary = Vocabulary::create([
      'vid' => $organigram->organigram->machine_name,
      'description' => $organigram->organigram->description,
      'name' => $organigram->organigram->name,
    ]);
    
    $vocabulary
      ->setThirdPartySetting('organigrams', 'is_organigram', TRUE);
    $vocabulary
      ->save();
    organigrams_create_term_fields($vocabulary
      ->id());
    if (!empty($organigram->items)) {
      
      $iid_mapping = [];
      
      foreach ($organigram->items as $item) {
        $term_array = [
          'name' => $item->name,
          'vid' => $vocabulary
            ->id(),
          'parent' => $item->parent,
          'weight' => $item->weight,
        ];
        
        if (isset($iid_mapping[$item->parent])) {
          $term_array['parent'] = $iid_mapping[$item->parent];
        }
        $ignore_keys = [
          'iid',
          'oid',
          'rdf_mapping',
          'organigrams_machine_name',
          'depth',
        ];
        foreach ($item as $key => $value) {
          if (in_array($key, $ignore_keys)) {
            continue;
          }
          
          if ($key == 'position' && in_array($value, [
            'l',
            'r',
          ])) {
            $value = 's';
          }
          $term_array['field_o_' . $key] = $value;
        }
        
        $term = Term::create($term_array);
        
        $term
          ->save();
        
        $iid_mapping[$item->iid] = $term
          ->id();
      }
    }
    $organigram_link = Link::fromTextAndUrl($organigram->organigram->name, Url::fromUserInput('/admin/structure/taxonomy/manage/' . $organigram->organigram->machine_name . '/overview'));
    
    $this
      ->messenger()
      ->addMessage($this
      ->t('Organigram "@name" imported.', [
      '@name' => $organigram_link
        ->toString(),
    ]));
  }
}