<?php

/**
 * @file
 * Widget for facets rendered as UI slider with Min/Max.
 */
class SearchApiRangesWidgetDate extends FacetapiWidget {

  /**
   * Renders the links.
   */
  public function execute() {
    $element = &$this->build[$this->facet['field alias']];

    $theme_suffix = '';
    $theme_suffix .= '__' . preg_replace('/\W+/', '_', $this->facet->getAdapter()->getSearcher());
    $theme_suffix .= '__' . preg_replace('/\W+/', '_', $this->facet['field alias']);

    $element = array(
      '#theme' => 'search_api_ranges_slider' . $theme_suffix,
      '#slider' => $this->_buildUIDateForm(),
    );
  }

/**
   * Allows the widget to provide additional settings to the form.
   */
  function settingsForm(&$form, &$form_state) {
    $form['widget']['widget_settings']['links'][$this->id]['date_format'] = array(
      '#type' => 'textfield',
      '#title' => t('Date format'),
      '#default_value' => $this->settings->settings['date_format'],
      '#description' => t('A user-defined date format. See the <a href="@url">PHP manual</a> for available options.', array('@url' => 'http://php.net/manual/fr/function.date.php')),
      '#states' => array('visible' => array('select[name="widget"]' => array('value' => $this->id),),),
    );
  }

  /**
   * Returns defaults for the settings form.
   */
  function getDefaultSettings() {
    return array(
      'date_format' => 'Y-m-d',
    );
  }

  /**
   * Builds a UI slider themed form.
   * Performs min/max queries through Search API.
   */
  public function _buildUIDateForm() {
    // Get Search API stuff
    $searcher = $this->facet->getAdapter()->getSearcher();
    $index_id = explode('@', $searcher);
    $index = search_api_index_load($index_id[1]);
    list($query, $results) = $this->facet->getAdapter()->getCurrentSearch();

    // Make a clone of the query, as to not alter the current search query
    $query = clone $query;

    // Prepare variables
    $variables = array(
      'index' => $index,
      'range_field' => $this->facet['field alias'],
      'query' => $query,
    );

    // Get facet path field/alias
    $range_field = $this->facet['field alias'];
    if (module_exists('facetapi_pretty_paths')) {
      $processor = new FacetapiUrlProcessorPrettyPaths($this->facet->getAdapter());
      $range_field = $processor->getFacetPrettyPathsAlias($this->facet->getFacet());
    };

    // Prepare the theme variables and return themed form
    // @see search-api-ranges-slider.tpl.php
    $variables = array(
      'range_field' => rawurlencode($range_field),
      'date_format' => $this->settings->settings['date_format'],
      'active_items' => $this->facet->getAdapter()->getAllActiveItems(),
      'target' => $this->facet->getAdapter()->getSearchPath(),
    );
    // We need to generate unique form IDs in case multiple forms get rendered
    // on the same page. search_api_ranges_forms() takes care of mapping them
    // back to the base form ID 'search_api_ranges_block_date_view_form'.
    return drupal_get_form('search_api_ranges_block_date_view_form_' . $range_field, $variables);
  }

}