<?php
/**
 * @file Module facetapi_radio.
 */

/**
 * Implements hook_facetapi_widgets().
 */
function facetapi_radio_facetapi_widgets() {
  return array(
    'facetapi_radio' => array(
      'handler' => array(
        'label' => t('Radio buttons'),
        'class' => 'FacetapiRadio',
        'query types' => array('term'),
      ),
    ),
  );
}

/**
 * Generates the radio buttons form from an array of options.
 */
function facetapi_radio_radio_form($form, &$form_state, $vars) {
  $form = array();

  $form['#attributes'] = $vars['attributes'];
  $form['#attached']['js'][] = drupal_get_path('module', 'facetapi_radio') . '/js/facetapi_radio.js';

  $form['select_query'] = array(
    '#type' => 'radios',
    '#options' => $vars['options'],
    '#default_value' => request_uri(),
  );
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Filter'),
  );

  if ($vars['settings']['auto-submit']) {
    $form['submit']['#attributes']['class'][] = 'js-hide';
  }

  return $form;
}

/**
 * Handle radio buttons block submit.
 */
function facetapi_radio_radio_form_submit($form, &$form_state) {
  $url = $form_state['values']['select_query'];
  $url = drupal_parse_url($form_state['values']['select_query']);
  $url['path'] = substr($url['path'], 1);
  drupal_goto($url['path'], $url);
}