Form Ajax

app/docroot/modules/custom/mymodule/mymodule.install

@@ -43,3 +43,4 @@ function mymodule_schema() {
 function mymodule_uninstall() {
   \Drupal::state()->delete('mymodule.AAA_custom_table');
 }
+

app/docroot/modules/custom/mymodule/mymodule.module

@@ -91,3 +91,12 @@ function mymodule_preprocess(&$variables, $hook) {
     $variables["#cache"]["contexts"][] = "url.query_args";
   }
 }
+
+/**
+ * Implements hook_form_FORM_ID_alter().
+ */
+function mymodule_form_mymodule_ajax_form_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state) {
+
+  #$form["url"]["#required"] = false;
+  #
+}

app/docroot/modules/custom/mymodule/src/Form/AjaxForm.php

@@ -3,10 +3,15 @@
 namespace Drupal\mymodule\Form;
 
 use Drupal\Core\Ajax\AjaxResponse;
+use Drupal\Core\Ajax\AlertCommand;
 use Drupal\Core\Ajax\CssCommand;
 use Drupal\Core\Ajax\HtmlCommand;
+use Drupal\Core\Ajax\RedirectCommand;
 use Drupal\Core\Form\FormBase;
 use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Routing\TrustedRedirectResponse;
+use Drupal\Core\Url;
+use Drupal\redirect\Entity\Redirect;
 
 class AjaxForm extends FormBase {
   public function getFormId() {
@@ -29,16 +34,15 @@ class AjaxForm extends FormBase {
       '#prefix' => '',
       '#suffix' => '<div class="email-validation-message"></div>',
       '#ajax' => [
-      'callback' => [$this, 'validateEmailCallbackAjax'],
-      'event' => 'change',
-      'wrapper' => 'edit-email',
-    ],
+        'callback' => [$this, 'validateEmailCallbackAjax'],
+        'event' => 'change',
+        'wrapper' => 'edit-email',
+      ],
     );
 
     $form['url'] = array(
       '#type' => 'textfield',
       '#title' => 'URL',
-      '#required' => TRUE,
       '#prefix' => '',
       '#suffix' => '<div class="url-validation-message"></div>',
       '#ajax' => [
@@ -46,20 +50,96 @@ class AjaxForm extends FormBase {
         'event' => 'change',
         'wrapper' => 'edit-email',
       ],
+      '#states' => array(
+        'visible' => array(
+          ':input[name="site"]' => ['value' => 'hasSite'],
+        ),
+      ),
+    );
+
+    $form['site'] = array(
+      '#type' => 'radios',
+      '#description' => t('Select'),
+      '#attributes' => [
+        'name' => 'site'
+      ],
+      '#default_value' => 'noSite',
+      '#required' => TRUE,
+      '#options' => array(
+        'hasSite' => t('У меня есть сайт'),
+        'noSite' => t('У меня нету сайта'),
+      )
     );
 
     $form['submit'] = array(
       '#type' => 'submit',
       '#value' => 'Click',
+      '#ajax' => [
+        'callback' => [$this, 'alert'],
+        'event' => 'click',
+      ],
     );
     return $form;
   }
 
   public function validateForm(array &$form, FormStateInterface $form_state) {
+    $url = $form_state->getValue('url');
+    $email = $form_state->getValue('email');
+    $site = $form_state->getValue('site');
+    if ($site == 'hasSite') {
+      if (!$this->checkUrl($url) or empty($url)) {
+        $form_state->setErrorByName('url', 'Неверно введен url');
+      }
+    }
+    if (!$this->checkEmail($email)) {
+      $form_state->setErrorByName('email', 'Неверно введен email');
+    }
+  }
 
+  public function submitForm(array &$form, FormStateInterface $form_state) {
+    #$url = Url::fromRoute('mymodule.batch_form');
+    #$form_state->setRedirectUrl();
+    #$form_state->setRedirect();
 
-    $url = $form_state->getValue('url');
+    $query = \Drupal::database()->insert('AAA_custom_table');
+    $query->fields([
+      'name' => $form_state->getValue('name'),
+      'email' => $form_state->getValue('email'),
+      'url' => $form_state->getValue('url'),
+    ]);
+    $query->execute();
+    $form_state->setRedirect('<front>');
+  }
+
+  public function getResponse(array &$form, FormStateInterface $form_state, $field_name) {
+    $response = new AjaxResponse();
+    $val = $field_name == 'email' ? $val = $form_state->getValue('email') : $val = $form_state->getValue('url');
+    $check = $field_name == 'email' ? $check = 'checkEmail' : $check = 'checkUrl';
 
+    if (!$this->$check($val)) {
+      $response->addCommand(new HtmlCommand('.email-validation-message', "Введен не корректный $field_name"));
+      $response->addCommand(new CssCommand('.email-validation-message', ['color' => 'red']));
+      $response->addCommand(new CssCommand('#edit-email', ['border' => '1px solid red']));
+    } else {
+      $response->addCommand(new HtmlCommand('.email-validation-message', ''));
+      $response->addCommand(new CssCommand('#edit-email', ['border' => '']));
+    }
+    return $response;
+  }
+
+  public function validateEmailCallbackAjax(array &$form, FormStateInterface $form_state, $filed_name) {
+    $field_name = 'email';
+    $response = $this->getResponse($form, $form_state, $field_name);
+    return $response;
+  }
+
+  public function validateUrlCallbackAjax(array &$form, FormStateInterface $form_state) {
+    $field_name = 'url';
+    $response = $this->getResponse($form, $form_state, $field_name);
+    return $response;
+  }
+
+  public function checkUrl($url) {
     $regexp = '/^(https|http):\/\//';
     $checkHttp = (bool)preg_match($regexp, $url);
     if ($checkHttp) {
@@ -78,38 +158,39 @@ class AjaxForm extends FormBase {
 
     $url = explode('.',$url);
     $url = $url[0] . '.' . $url[1];
-
-  }
-
-  public function submitForm(array &$form, FormStateInterface $form_state) {
-    $query = \Drupal::database()->insert('AAA_custom_table');
-    $query->fields([
-      'name' => $form_state->getValue('name'),
-      'email' => $form_state->getValue('email'),
-      'url' => $form_state->getValue('url'),
-    ]);
-    $query->execute();
+    if ($checkUrl) {
+      return true;
+    } else {
+      return false;
+    }
   }
 
-  public function validateEmailCallbackAjax(array &$form, FormStateInterface $form_state) {
-    $response = new AjaxResponse();
-    $email = $form_state->getValue('email');
+  public function checkEmail($email) {
     $email_valid = filter_var($email, FILTER_VALIDATE_EMAIL);
-    if (!$email_valid and !empty($email)) {
-      $response->addCommand(new HtmlCommand('.email-validation-message', 'Введен не корректный email'));
-      $response->addCommand(new CssCommand('.email-validation-message', ['color' => 'red']));
-      $response->addCommand(new CssCommand('#edit-email', ['border' => '1px solid red']));
+    if ($email_valid and !empty($email)) {
+      return true;
     } else {
-      $response->addCommand(new HtmlCommand('.email-validation-message', ''));
-      $response->addCommand(new CssCommand('#edit-email', ['border' => '']));
+      return false;
     }
-    return $response;
   }
-
-  public function validateUrlCallbackAjax(array &$form, FormStateInterface $formState) {
+  public function alert(array &$form, FormStateInterface $form_state) {
     $response = new AjaxResponse();
-    $response->addCommand(new HtmlCommand('.url-validation-message', 'ZXC'));
-    $response->addCommand(new CssCommand('#edit-url', ['border' => '1px solid red']));
+    $url = $form_state->getValue('url');
+    $email = $form_state->getValue('email');
+    $site = $form_state->getValue('site');
+    $commandRedirect = new RedirectCommand('/home');
+
+    if ($site == 'hasSite') {
+      if (!$this->checkUrl($url) or empty($url)) {
+        $form_state->setErrorByName('url', 'Неверное введен url');
+      }
+    }
+
+    if (!$this->checkEmail($email)) {
+      $form_state->setErrorByName('email', 'Неверное введен email');
+    }
+    $response->addCommand(new AlertCommand('Спасибо за заполнение'));
+    $response->addCommand($commandRedirect);
     return $response;
   }
 }