nocurrent_pass.module

<?php

/**
 * @file Provide settings to be able to disable the Current password field on the user edit page
 *
 * Alter the Account settings page (Configuration > People > Account settings) and the user edit page.
 */
use Drupal\Component\Utility\Crypt;
use Drupal\Core\Form\FormStateInterface;

/**
 * Implements hook_form_FORM_ID_alter().
 *
 * Adds a checkbox inside a fieldset to the Account settings page (Configuration > People > Account settings)
 * where we can disable or enable the Current Password field on user edit page.
 */
function nocurrent_pass_form_user_admin_settings_alter(&$form, &$form_state) {

  // Get configuration
  $nocurrent_pass_disabled = \Drupal::config('nocurrent_pass.settings')->get('nocurrent_pass_disabled');

  // Reorder fieldset weights
  $form['anonymous_settings']['#weight'] = -4;
  $form['admin_role']['#weight'] = -3;
  $form['registration_cancellation']['#weight'] = -2;

  // Add "Do not require current password" field and its fieldset
  $form['nocurrent_pass_settings'] = array(
    '#type' => 'fieldset',
    '#title' => t('Require Current Password'),
    '#weight' => -1,
  );
  $form['nocurrent_pass_settings']['nocurrent_pass_disabled'] = array(
    '#type' => 'checkbox',
    '#title' => t('Do not require current password'),
    '#description' => t('Check this box to disable the "current password" field on the User Edit form.'),
    '#default_value' => $nocurrent_pass_disabled,
  );

  // Add submit function which saves the settings into configuration
  $form['#submit'][] = 'nocurrent_pass_form_user_admin_settings_submit';
}

/**
 * Submit - "Save the Do not require current password" field's vale into configuration
 */
function nocurrent_pass_form_user_admin_settings_submit(array &$form, FormStateInterface $form_state) {
  $config = \Drupal::service('config.factory')->getEditable('nocurrent_pass.settings');
  $config->set('nocurrent_pass_disabled', $form_state->getValue('nocurrent_pass_disabled'));
  $config->save();
}

/**
 * Implements hook_form_FORM_ID_alter().
 * Remove the current password field from the user_profile_form form (user/%/edit).
 */
function nocurrent_pass_form_user_form_alter(&$form, &$form_state) {

  // Get the module's configuration
  $config = \Drupal::config('nocurrent_pass.settings');
  $nocurrent_pass_disabled = $config->get('nocurrent_pass_disabled');

  // If the Current password is disabled
  if ($nocurrent_pass_disabled) {

    $account = \Drupal::service('current_route_match')->getParameter('user');

    // If this is not the Superadmin's edit page
    if ( !empty($account) && ($account->id() != 1) ) {

      // Turn off Current password field's validation
      $form_state->set('user_pass_reset', 1);

      // Hide the Current password fields
      $form['account']['current_pass']['#access'] = FALSE;
    }
  }
}