Issue #3300420 by mcdruid, Jelle_S: Validate and Submit handlers for settings form

  return system_settings_form($form);

}

/**

 * Validate handler for settings form.

 */

function jquery_update_settings_form_validate($form, &$form_state) {

  // Handle empty custom paths / versions

  if (!empty($form_state['values']['jquery_update_custom_path_jquery'])) {

    if (empty($form_state['values']['jquery_update_custom_version_jquery'])) {

      form_set_error('jquery_update_custom_version_jquery', 'Please provide a version for the custom jQuery path');

    }

  }

  if (!empty($form_state['values']['jquery_update_custom_path_jqueryui'])) {

    if (empty($form_state['values']['jquery_update_custom_version_jqueryui'])) {

      form_set_error('jquery_update_custom_version_jqueryui', 'Please provide a version for the custom jQuery UI path');

    }

  }

  if (!empty($form_state['values']['jquery_update_custom_path_cookie'])) {

    if (empty($form_state['values']['jquery_update_custom_version_jquery_cookie'])) {

      form_set_error('jquery_update_custom_version_jquery_cookie', 'Please provide a version for the custom jQuery Cookie path');

    }

  }

  if (!empty($form_state['values']['jquery_update_custom_path_form'])) {

    if (empty($form_state['values']['jquery_update_custom_version_jquery_form'])) {

      form_set_error('jquery_update_custom_version_jquery_form', 'Please provide a version for the custom jQuery Form path');

    }

  }

  if (!empty($form_state['values']['jquery_update_custom_path_migrate'])) {

    if (empty($form_state['values']['jquery_update_custom_version_jquery_migrate'])) {

      form_set_error('jquery_update_custom_version_jquery_migrate', 'Please provide a version for the custom jQuery Migrate path');

    }

  }

}

/**

 * Implements hook_form_FORM_ID_alter().

 */

function jquery_update_form_jquery_update_settings_form_alter(&$form, &$form_state, $form_id) {

  array_unshift($form['#submit'], 'jquery_update_settings_form_submit');

}

/**

 * Submit handler for settings form.

 */

function jquery_update_settings_form_submit($form, &$form_state) {

  // Handle empty custom paths / versions

  $variables = array(

    'jquery_update_custom_path_cookie',

    'jquery_update_custom_path_form',

    'jquery_update_custom_path_jquery',

    'jquery_update_custom_path_jqueryui',

    'jquery_update_custom_path_migrate',

    'jquery_update_custom_version_jquery',

    'jquery_update_custom_version_jquery_cookie',

    'jquery_update_custom_version_jquery_form',

    'jquery_update_custom_version_jquery_migrate',

    'jquery_update_custom_version_jqueryui',

  );

  foreach ($variables as $variable) {

    if (empty($form_state['values'][$variable])) {

      unset($form_state['values'][$variable]);

      variable_del($variable);

    }

  }

}