Installer kit

project_template/web/profiles/drupal_cms_installer/src/Form/RecipesForm.php

-<?php
-
-namespace Drupal\drupal_cms_installer\Form;
-
-use Drupal\Core\Form\FormBase;
-use Composer\InstalledVersions;
-use Drupal\Component\Serialization\Yaml;
-use Drupal\Core\Form\FormStateInterface;
-use Drupal\Core\Render\Element\Checkboxes;
-
-/**
- * Provides a form to choose the site template and optional add-on recipes.
- *
- * @todo Present this as a mini project browser once
- *   https://www.drupal.org/i/3450629 is fixed.
- */
-final class RecipesForm extends FormBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getFormId(): string {
-    return 'drupal_cms_installer_recipes_form';
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function buildForm(array $form, FormStateInterface $form_state): array {
-    $form['#title'] = $this->t('Get started');
-
-    $form['help'] = [
-      '#prefix' => '<p class="cms-installer__subhead">',
-      '#markup' => $this->t('You can select pre-configured types of content now, or add them later.'),
-      '#suffix' => '</p>',
-    ];
-
-    $form['add_ons'] = [
-      '#prefix' => '<div class="cms-installer__form-group">',
-      '#suffix' => '</div>',
-      '#type' => 'checkboxes',
-      '#value_callback' => static::class . '::valueCallback',
-    ];
-
-    $base_recipe_path = InstalledVersions::getInstallPath('drupal/drupal_cms_starter');
-    $cookbook_path = dirname($base_recipe_path);
-
-    // Read the list of optional recipes from the base recipe's `composer.json`.
-    $composer = file_get_contents($base_recipe_path . '/composer.json');
-    $composer = json_decode($composer, TRUE, flags: JSON_THROW_ON_ERROR);
-    $optional_recipes = array_keys($composer['suggest'] ?? []);
-
-    foreach ($optional_recipes as $name) {
-      $recipe = $cookbook_path . '/' . basename($name) . '/recipe.yml';
-      if (file_exists($recipe)) {
-        $recipe = file_get_contents($recipe);
-        $recipe = Yaml::decode($recipe);
-        $key = basename($name);
-        $form['add_ons']['#options'][$key] = $recipe['name'];
-      }
-    }
-
-    $form['add_ons']['help'] = [
-      '#prefix' => '<p class="cms-installer__info">',
-      '#markup' => $this->t('Don’t see what you’re looking for? You can set up customized content later.'),
-      '#suffix' => '</p>',
-      '#weight' => 100,
-    ];
-
-    $form['actions'] = [
-      'submit' => [
-        '#type' => 'submit',
-        '#value' => $this->t('Next'),
-        '#button_type' => 'primary',
-        '#op' => 'submit',
-        '#attributes' => [
-          'class' => ['button--next']
-        ]
-      ],
-      'skip' => [
-        '#type' => 'submit',
-        '#value' => $this->t('Skip this step'),
-        '#op' => 'skip',
-      ],
-      '#type' => 'actions',
-    ];
-    return $form;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function submitForm(array &$form, FormStateInterface $form_state): void {
-    global $install_state;
-    $install_state['parameters']['recipes'] = ['drupal_cms_starter'];
-
-    $pressed_button = $form_state->getTriggeringElement();
-    // Only choose add-ons if the Next button was pressed, or if the form was
-    // submitted programmatically (i.e., by `drush site:install`).
-    if (($pressed_button && $pressed_button['#op'] === 'submit') || $form_state->isProgrammed()) {
-      $add_ons = $form_state->getValue('add_ons', []);
-      $add_ons = array_filter($add_ons);
-      array_push($install_state['parameters']['recipes'], ...array_values($add_ons));
-    }
-  }
-
-  public static function valueCallback(&$element, $input, FormStateInterface $form_state): array {
-    // If the input was a comma-separated string or `*`, transform it -- this is
-    // for compatibility with `drush site:install`.
-    if (is_string($input)) {
-      $selections = $input === '*'
-        ? array_keys($element['#options'])
-        : array_map('trim', explode(',', $input));
-
-      $input = array_combine($selections, $selections);
-    }
-    return Checkboxes::valueCallback($element, $input, $form_state);
-  }
-
-}