Update Composer, update everything

vendor/chi-teck/drupal-code-generator/templates/d8/form/config.twig

@@ -0,0 +1,59 @@
+<?php
+
+namespace Drupal\{{ machine_name }}\Form;
+
+use Drupal\Core\Form\ConfigFormBase;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Configure {{ name }} settings for this site.
+ */
+class {{ class }} extends ConfigFormBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFormId() {
+    return '{{ form_id }}';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getEditableConfigNames() {
+    return ['{{ machine_name }}.settings'];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildForm(array $form, FormStateInterface $form_state) {
+    $form['example'] = [
+      '#type' => 'textfield',
+      '#title' => $this->t('Example'),
+      '#default_value' => $this->config('{{ machine_name }}.settings')->get('example'),
+    ];
+    return parent::buildForm($form, $form_state);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validateForm(array &$form, FormStateInterface $form_state) {
+    if ($form_state->getValue('example') != 'example') {
+      $form_state->setErrorByName('example', $this->t('The value is not correct.'));
+    }
+    parent::validateForm($form, $form_state);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitForm(array &$form, FormStateInterface $form_state) {
+    $this->config('{{ machine_name }}.settings')
+      ->set('example', $form_state->getValue('example'))
+      ->save();
+    parent::submitForm($form, $form_state);
+  }
+
+}

vendor/chi-teck/drupal-code-generator/templates/d8/form/confirm.twig

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+<?php
+
+namespace Drupal\{{ machine_name }}\Form;
+
+use Drupal\Core\Form\ConfirmFormBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Url;
+
+/**
+ * Provides a confirmation form before clearing out the examples.
+ */
+class {{ class }} extends ConfirmFormBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFormId() {
+    return '{{ form_id }}';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getQuestion() {
+    return $this->t('Are you sure you want to do this?');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCancelUrl() {
+    return new Url('system.admin_config');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitForm(array &$form, FormStateInterface $form_state) {
+    // @DCG Place your code here.
+    $this->messenger()->addStatus($this->t('Done!'));
+    $form_state->setRedirectUrl($this->getCancelUrl());
+  }
+
+}

vendor/chi-teck/drupal-code-generator/templates/d8/form/route.twig

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+{{ route_name }}:
+  path: '{{ route_path }}'
+  defaults:
+    _title: '{{ route_title }}'
+    _form: 'Drupal\{{ machine_name }}\Form\{{ class }}'
+  requirements:
+    _permission: '{{ route_permission }}'

vendor/chi-teck/drupal-code-generator/templates/d8/form/simple.twig

@@ -0,0 +1,59 @@
+<?php
+
+namespace Drupal\{{ machine_name }}\Form;
+
+use Drupal\Core\Form\FormBase;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Provides a {{ name }} form.
+ */
+class {{ class }} extends FormBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFormId() {
+    return '{{ form_id }}';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildForm(array $form, FormStateInterface $form_state) {
+
+    $form['message'] = [
+      '#type' => 'textarea',
+      '#title' => $this->t('Message'),
+      '#required' => TRUE,
+    ];
+
+    $form['actions'] = [
+      '#type' => 'actions',
+    ];
+    $form['actions']['submit'] = [
+      '#type' => 'submit',
+      '#value' => $this->t('Send'),
+    ];
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validateForm(array &$form, FormStateInterface $form_state) {
+    if (mb_strlen($form_state->getValue('message')) < 10) {
+      $form_state->setErrorByName('name', $this->t('Message should be at least 10 characters.'));
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitForm(array &$form, FormStateInterface $form_state) {
+    $this->messenger()->addStatus($this->t('The message has been sent.'));
+    $form_state->setRedirect('<front>');
+  }
+
+}