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<?php
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// $Id: reference_facets.module,v 1.10 2008/09/03 23:06:52 davidlesieur Exp $
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/**
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* @file
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* Exposes CCK Node Reference and User Reference fields as facets.
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*/
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module_load_include('inc', 'cck_facets');
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/**
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* Implementation of hook_cck_facets_collect().
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*/
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function reference_facets_cck_facets_collect(&$facets, $field, $domain, $env, $arg = NULL) {
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if ($field['type'] == 'nodereference' || $field['type'] == 'userreference') {
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switch ($domain) {
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case 'facets':
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$facets[] = new reference_facet($field);
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break;
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case 'text':
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// Scan the given search text for a '{field_name}:{value}'
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// token, and create facets from it.
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if ($ref = search_query_extract($arg, $field['field_name'])) {
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if (is_numeric($ref) && $ref > 0) {
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// Create an active facet with the value found in the search text.
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$category = new reference_facet_category($field, $ref);
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$facets[] = new reference_facet($field, array($category));
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}
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// Remove the parsed text
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$arg = search_query_insert($arg, $field['field_name']);
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}
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break;
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case 'node':
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if (isset($arg->{$field['field_name']}) && is_array($arg->{$field['field_name']})) {
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// Iterate through the field's multiple values.
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foreach ($arg->{$field['field_name']} as $item) {
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if (($value = array_shift($item)) != 0) { // Don't show empty references.
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$category = new reference_facet_category($field, $value);
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$facets[] = new reference_facet($field, array($category));
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}
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}
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}
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break;
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}
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}
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return $arg;
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}
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/**
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* A facet for CCK Node Reference and User Reference fields.
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*
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* @see reference_facet_category
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*/
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class reference_facet extends cck_facet {
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function reference_facet($field, $active_path = array()) {
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parent::cck_facet($field, $active_path);
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}
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function build_root_categories_query(&$query) {
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$db_info = _cck_facets_db_info($this->_field);
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$query->add_table($db_info['table'], 'vid', 'n', 'vid');
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$main_column = array_shift($db_info['columns']);
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$query->add_field($db_info['table'], $main_column['column'], $this->_field['field_name']);
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$query->add_where($db_info['table'] .'.'. $main_column['column'] .' != 0'); // No empty references.
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$query->add_groupby($this->_field['field_name']);
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return TRUE;
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}
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function build_categories($results) {
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$categories = array();
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while ($result = db_fetch_object($results)) {
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$categories[] = new reference_facet_category($this->_field, $result->{$this->_field['field_name']}, $result->count);
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}
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return $categories;
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}
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}
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/**
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* A facet category for CCK Node Reference and User Reference fields.
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*
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* @see reference_facet
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*/
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class reference_facet_category extends cck_facet_category {
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function reference_facet_category($field, $value, $count = NULL) {
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parent::cck_facet_category($field, $value, $count);
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}
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function get_label($html = FALSE) {
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$db_info = _cck_facets_db_info($this->_field);
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// Get the label using the 'plain' formatter.
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$label = content_format($this->_field['field_name'], array(key($db_info['columns']) => $this->_value), 'plain');
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// Note: The label is already filtered by the CCK formatter and does not
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// need to be filtered here.
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return $html ? $label : strip_tags($label);
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}
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}
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