www.aleph1.co.uk Git - yaffs-website/blob - web/core/modules/system/tests/modules/batch_test/src/Form/BatchTestMultiStepForm.php

   1 <?php
   2
   3 namespace Drupal\batch_test\Form;
   4
   5 use Drupal\Core\Form\FormBase;
   6 use Drupal\Core\Form\FormStateInterface;
   7
   8 /**
   9  * Generate form of id batch_test_multistep_form.
  10  */
  11 class BatchTestMultiStepForm extends FormBase {
  12
  13   /**
  14    * {@inheritdoc}
  15    */
  16   public function getFormId() {
  17     return 'batch_test_multistep_form';
  18   }
  19
  20   /**
  21    * {@inheritdoc}
  22    */
  23   public function buildForm(array $form, FormStateInterface $form_state) {
  24     $step = $form_state->get('step');
  25     if (empty($step)) {
  26       $step = 1;
  27       $form_state->set('step', $step);
  28     }
  29
  30     $form['step_display'] = [
  31       '#markup' => 'step ' . $step . '<br/>',
  32     ];
  33     $form['submit'] = [
  34       '#type' => 'submit',
  35       '#value' => 'Submit',
  36     ];
  37
  38     // This is a POST form with multiple steps that does not transition from one
  39     // step to the next via POST requests, but via GET requests, because it uses
  40     // Batch API to advance through the steps.
  41     $form['#cache']['max-age'] = 0;
  42
  43     return $form;
  44   }
  45
  46   /**
  47    * {@inheritdoc}
  48    */
  49   public function submitForm(array &$form, FormStateInterface $form_state) {
  50     batch_test_stack(NULL, TRUE);
  51
  52     $step = $form_state->get('step');
  53     switch ($step) {
  54       case 1:
  55         batch_set(_batch_test_batch_1());
  56         break;
  57       case 2:
  58         batch_set(_batch_test_batch_2());
  59         break;
  60     }
  61
  62     if ($step < 2) {
  63       $form_state->set('step', ++$step);
  64       $form_state->setRebuild();
  65     }
  66
  67     $form_state->setRedirect('batch_test.redirect');
  68   }
  69
  70 }