ModuleConfigurationForm.php

<?php

namespace Drupal\wcm8_siteinfo\Form;

use Drupal\Core\Form\ConfigFormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Component\Utility\UrlHelper;

/**
 * Defines a form that configures module settings.
 */
class ModuleConfigurationForm extends ConfigFormBase {

  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'wcm8_siteinfo_admin_settings';
  }

  /**
   * {@inheritdoc}
   */
  protected function getEditableConfigNames() {
    return [
      'wcm8_siteinfo.settings',
      'system.site',
    ];
  }

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    $config = $this->config('wcm8_siteinfo.settings');
    $site_config = $this->config('system.site');
    $site_name = $site_config->get('name');

    $form['siteinfo'] = array(
      '#type' => 'vertical_tabs',
      '#default_tab' => 'edit-basic',
    );

    // Basic Information tab
    $form['basic'] = array(
      '#type' => 'details',
      '#title' => $this->t('Basic Information'),
      '#group' => 'siteinfo',
    );

    $form['basic']['site_name_prefix'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('Site Name Prefix'),
      '#description' => $this->t('The prefix for your site name - for example, <i>Department of</i> ... '),
      '#size' => '60',
      '#maxlength' => '60',
      '#default_value' => $config->get('site_name_prefix'),
    );

    $form['basic']['site_name'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('Site Name'),
      '#description' => $this->t('Main name for the site - it should be your college, department or organization name.'),
      '#size' => '60',
      '#maxlength' => '75',
      '#default_value' => $site_name,
    );

    $form['basic']['admin_link'] = array(
      '#type' => 'checkbox',
      '#title' => $this->t('Admin Link'),
      '#description' => $this->t('Check this box if you would like to automatically display an admin login link in your site footer. It will be displayed below the Footer Block. If you don\'t want to add the link here you can add it elsewhere by creating a link to "/user/login".'),
      '#default_value' => $config->get('admin_link'),
    );

    $form['basic']['footer_text'] = array(
      '#type' => 'text_format',
      '#title' => $this->t('Footer Text'),
      '#description' => $this->t('This content will be displayed in the footer below the contact info. It can contain links or other pertinent information. This is a good place for your ADA statement.'),
      '#format' => 'filtered_html',
      '#default_value' => $config->get('footer_text.value'),
    );

    // Contact Information tab
    $form['contact'] = array(
      '#type' => 'details',
      '#title' => $this->t('Contact Information'),
      '#description' => $this->t('Contact information will be displayed below the Ohio State wordmark in the site footer. Leave blank any fields that you do not want to be displayed.'),
      '#group' => 'siteinfo',
    );

    $form['contact']['address_1'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('Address Line 1'),
      '#description' => $this->t('First line of address. Room number and building if on campus.'),
      '#default_value' => $config->get('address_1'),
    );

    $form['contact']['address_2'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('Address Line 2'),
      '#description' => $this->t('Second line of address. Street address if on campus.'),
      '#default_value' => $config->get('address_2'),
    );

    $form['contact']['city'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('City'),
      '#default_value' => $config->get('city'),
    );

    $form['contact']['state'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('State'),
      '#default_value' => $config->get('state'),
    );

    $form['contact']['zip'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('Zip Code'),
      '#description' => $this->t('Formatted: 43210 or 43210-1234'),
      '#default_value' => $config->get('zip'),
    );

    $form['contact']['phone'] = array(
      '#type' => 'tel',
      '#title' => $this->t('Phone'),
      '#description' => $this->t('Formatted: 614-555-5555'),
      '#default_value' => $config->get('phone'),
    );

    $form['contact']['fax'] = array(
      '#type' => 'tel',
      '#title' => $this->t('Fax'),
      '#description' => $this->t('Formatted: 614-555-5555'),
      '#default_value' => $config->get('fax'),
    );

    $form['contact']['contact_email'] = array(
      '#type' => 'email',
      '#title' => $this->t('Email'),
      '#description' => $this->t('Main contact email for your site.'),
      '#default_value' => $config->get('contact_email'),
    );

    // Social Networking tab
    $form['social'] = array(
      '#type' => 'details',
      '#title' => $this->t('Social Networking'),
      '#description' => $this->t('Linked icons will be displayed in the site footer for each social media account URL that you provide. Leave blank any fields that you do not want to be displayed.'),
      '#group' => 'siteinfo',
    );

    $form['social']['twitter'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('Twitter'),
      '#description' => t('Enter the URL to your Twitter account.'),
      '#size' => '70',
      '#maxlength' => '150',
      '#default_value' => $config->get('twitter'),
    );

    $form['social']['facebook'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('Facebook'),
      '#description' => t('Enter the URL to your Facebook account.'),
      '#size' => '70',
      '#maxlength' => '150',
      '#default_value' => $config->get('facebook'),
    );

    $form['social']['linkedin'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('LinkedIn'),
      '#description' => t('Enter the URL to your LinkedIn account.'),
      '#size' => '70',
      '#maxlength' => '150',
      '#default_value' => $config->get('linkedin'),
    );

    $form['social']['googleplus'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('Google+'),
      '#description' => t('Enter the URL to your Google+ account.'),
      '#size' => '70',
      '#maxlength' => '150',
      '#default_value' => $config->get('googleplus'),
    );

    $form['social']['youtube'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('YouTube'),
      '#description' => t('Enter the URL to your YouTube account.'),
      '#size' => '70',
      '#maxlength' => '150',
      '#default_value' => $config->get('youtube'),
    );

    $form['social']['instagram'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('Instagram'),
      '#description' => t('Enter the URL to your Instagram account.'),
      '#size' => '70',
      '#maxlength' => '150',
      '#default_value' => $config->get('instagram'),
    );

    $form['social']['photos'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('Photos'),
      '#description' => t('Enter the URL to your photo sharing account (ex. Flickr, SmugMug, Picasa, etc...).'),
      '#size' => '70',
      '#maxlength' => '150',
      '#default_value' => $config->get('photos'),
    );

    return parent::buildForm($form, $form_state);
  }


  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $values = $form_state->getValues();

    //set config values unique to this module
    $this->config('wcm8_siteinfo.settings')
      ->set('site_name_prefix', $values['site_name_prefix'])
      ->set('admin_link', $values['admin_link'])
      ->set('footer_text', $values['footer_text'])
      ->set('address_1', $values['address_1'])
      ->set('address_2', $values['address_2'])
      ->set('city', $values['city'])
      ->set('state', $values['state'])
      ->set('zip', $values['zip'])
      ->set('phone', $values['phone'])
      ->set('fax', $values['fax'])
      ->set('contact_email', $values['contact_email'])
      ->set('twitter', $values['twitter'])
      ->set('facebook', $values['facebook'])
      ->set('linkedin', $values['linkedin'])
      ->set('googleplus', $values['googleplus'])
      ->set('youtube', $values['youtube'])
      ->set('instagram', $values['instagram'])
      ->set('photos', $values['photos'])
      ->save();

      //set site name value back to system.site
      $this->configFactory->getEditable('system.site')
        ->set('name', $values['site_name'])
        ->save();

    parent::submitForm($form, $form_state);
  }


  /**
   * {@inheritdoc}
   */
  public function validateForm(array &$form, FormStateInterface $form_state) {
    $values = $form_state->getValues();

    // zip code fields
    $zipCodes = ['zip'];
    foreach ($zipCodes as $zipCode) {
      if (!empty($values[$zipCode]) && !preg_match('/^\d{5}(?:[-\s]\d{4})?$/i', $values[$zipCode])) {
        $form_state->setErrorByName($zipCode, $this->t('The Zip Code is not in the proper format.'));
      }
    }

    // phone number fields
    $phoneNumbers = ['phone', 'fax'];
    foreach ($phoneNumbers as $number) {
      if (!empty($values[$number]) && !preg_match('/^\d{3}-\d{3}-\d{4}$/i', $values[$number])) {
        $form_state->setErrorByName($number, $this->t('The ' . $number . ' number is not a valid phone number or is not in the proper format.'));
      }
    }

    // url text fields
    $urls = ['twitter', 'facebook', 'linkedin', 'googleplus', 'youtube', 'instagram', 'photos' ];
    foreach ($urls as $url) {
      $field_title = $form['social'][$url]['#title'];
      $valid_url = UrlHelper::isValid($values[$url], TRUE);
      if (!empty($values[$url]) && !$valid_url) {
        $form_state->setErrorByName($url, $this->t('The ' . $field_title . ' link is not a valid URL.'));
      }
    }
  }

}