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<?php
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// $Id: faceted_search_views.module,v 1.21 2009/06/26 21:07:20 davidlesieur Exp $
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/**
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* @file
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* Allows to use Views to display Faceted Search results.
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*/
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require_once('./'. drupal_get_path('module', 'faceted_search') .'/faceted_search_ui.inc');
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/**
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* Implementation of hook_faceted_search_ui_style_info().
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*
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* Return display styles based on views that use the Faceted Search argument.
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*/
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function faceted_search_views_faceted_search_ui_style_info() {
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$styles = array();
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foreach (views_get_all_views() as $view) {
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if ($view->base_table == 'node' && empty($view->disabled) && $view->display['default']->display_options['use_pager']) {
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$styles[$view->name] = new faceted_search_views_style($view->name);
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}
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}
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return $styles;
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}
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/**
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* Implementation of hook_views_query_alter().
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*/
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function faceted_search_views_views_query_alter (&$view, &$query) {
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if (is_array($view->args[0]) && isset($view->args[0]['faceted_search'])) {
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$search = $view->args[0]['faceted_search'];
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if ($search->ready()) {
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if ($search->get_results_count() > 0) {
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$join = new views_join();
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$join->construct($search->get_results_table(), 'node', 'nid', 'nid', array(), 'INNER');
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$query->add_table($search->get_results_table(), NULL, $join);
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}
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else {
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$query->add_where(0, 'FALSE'); // Ensure the view shows no results.
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}
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}
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}
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}
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/**
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* Implementation of hook_views_pre_execute().
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*/
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function faceted_search_views_views_pre_execute(&$view) {
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if (is_array($view->args[0]) && isset($view->args[0]['faceted_search']) && $view->current_display == 'default') {
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if (empty($view->pager['items_per_page'])) {
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// Make sure a limit is set.
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$view->set_items_per_page(variable_get('default_nodes_main', 10));
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}
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if (empty($view->pager['use_pager'])) {
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$view->set_use_pager(TRUE);
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}
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}
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}
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/**
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* Provides a view-based display style for search results.
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*/
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class faceted_search_views_style extends faceted_search_ui_style {
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// Name of the view to use with this style.
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var $_name;
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/**
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* Constructor.
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*
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* @param $view_name
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* Name of the view to use with this style.
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*/
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function faceted_search_views_style($view_name) {
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$this->_name = $view_name;
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}
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/**
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* Return the name of this style.
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*/
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function get_label() {
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return t('Views: @view', array('@view' => $this->_name));
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}
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/**
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* Apply the view's count query as a subquery to filter the search results.
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*
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* Note: We use the view's count query for this purpose because we don't need
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* the sorting and field selection provided by view's full query. The view's
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* only purpose here is to filter the search results.
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*/
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function query_alter(&$query, $search) {
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$view = views_get_view($this->_name);
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$view->set_display('default');
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$view->set_arguments(array('faceted_search' => $search));
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$view->build('default');
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$views_query = db_rewrite_sql($view->build_info['count_query'], $view->base_table, $view->base_field, array('view' => &$view));
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$views_args = $view->build_info['query_args'];
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$views_replacements = module_invoke_all('views_query_substitutions', $view);
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$views_query = str_replace(array_keys($views_replacements), $views_replacements, $views_query);
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if (is_array($views_args)) {
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foreach ($views_args as $id => $arg) {
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$views_args[$id] = str_replace(array_keys($views_replacements), $views_replacements, $arg);
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}
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}
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$query->add_subquery('n.nid IN ('. $views_query .')', $views_args);
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}
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/**
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* Format the search results according to this style's desire.
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*/
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function format_results($search) {
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if ($view = views_get_view($this->_name)) {
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if ($view->access('default')) {
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$output = views_embed_view($this->_name, 'default' , array('faceted_search' => $search));
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$view->destroy();
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}
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else {
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$view->destroy();
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drupal_access_denied();
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exit();
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}
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}
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return $output;
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}
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}
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