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<?php
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// $Id: biblio_facets.module,v 1.11 2008/04/14 17:37:16 davidlesieur Exp $
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/**
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* @file
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* Provides facets based on Biblio fields.
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*/
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require_once('./'. drupal_get_path('module', 'faceted_search') .'/faceted_search.inc');
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/**
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* Implementation of hook_faceted_search_collect().
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*/
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function biblio_facets_faceted_search_collect(&$facets, $domain, $env_id, $selection, $arg = NULL) {
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switch ($domain) {
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case 'facets':
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$fields = _biblio_facets_get_fields();
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foreach ($fields as $field) {
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$key = _biblio_facets_field_to_key($field->tid, $field->fid);
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if (!isset($selection) || isset($selection['biblio_field'][$key])) {
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if (module_exists('biblio_normalize') && biblio_normalize_is_normalized($field->tid, $field->fid)) {
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$facets[] = new biblio_normalized_field_facet($field);
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}
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else {
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$facets[] = new biblio_field_facet($field);
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}
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}
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}
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break;
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case 'text':
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// Scan the given search text for a 'biblio_field:{tid}.{fid}:"{value}"'
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// token, and create facets from it.
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if ($found_text = _biblio_facets_quoted_query_extract($arg, 'biblio_field')) {
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// Extract separate facets. Using a regex rather than a simple
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// explode(',',$found_text) because commas might be used in field values and
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// we want to ignore those when splitting the text.
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$specifiers = array();
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if (preg_match_all('/((.+?[.].+?):".+?")(,| |$)/', $found_text, $specifiers)) {
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$fields = _biblio_facets_get_fields();
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foreach ($specifiers[1] as $index => $specifier) {
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$key = $specifiers[2][$index];
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if (isset($key) && isset($fields[$key]) && (!isset($selection) || isset($selection['biblio_field'][$key]))) {
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list($tid, $fid, $value) = _biblio_facets_key_to_field($specifier);
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if (isset($tid) && is_numeric($tid) && $tid >= 0 && isset($fid) && is_numeric($fid) && $fid > 0 && isset($value)) {
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// Create an active facet with the value found in the search text.
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if (module_exists('biblio_normalize') && biblio_normalize_is_normalized($tid, $fid)) {
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$active_category = new biblio_normalized_field_category($fields[$key], $value);
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$facets[] = new biblio_normalized_field_facet($fields[$key], $active_category);
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}
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else {
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$active_category = new biblio_field_category($fields[$key], $value);
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$facets[] = new biblio_field_facet($fields[$key], $active_category);
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}
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}
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}
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}
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}
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// Remove the parsed text
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$arg = _biblio_facets_quoted_query_insert($arg, 'biblio_field');
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}
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return $arg;
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case 'node':
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if ($arg->type == 'biblio') {
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$fields = _biblio_facets_get_fields();
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foreach ($fields as $field) {
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$key = _biblio_facets_field_to_key($field->tid, $field->fid);
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if ((!isset($selection) || isset($selection['biblio_field'][$key])) && ($field->tid == 0 || $arg->biblio_type == $field->tid) && !empty($arg->{$field->name})) {
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// Create a facet with the found field value as the active category.
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if (module_exists('biblio_normalize') && biblio_normalize_is_normalized($field->tid, $field->fid)) {
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$values = biblio_normalize_get_normalized_values($arg, $field);
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foreach ($values as $value) {
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$active_category = new biblio_normalized_field_category($field, $value);
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$facets[] = new biblio_normalized_field_facet($field, $active_category);
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}
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}
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else {
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$active_category = new biblio_field_category($field, $arg->{$field->name});
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$facets[] = new biblio_field_facet($field, $active_category);
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}
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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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/**
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* A facet for Biblio fields. Each facet represents a Biblio field.
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*
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* @see biblio_field_category
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*/
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class biblio_field_facet extends faceted_search_facet {
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/**
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* Field object corresponding to this facet.
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*
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* @see biblio_facets_get_fields
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*/
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var $_field = NULL;
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/**
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* Constructor. Optionally assigns the active category of the facet.
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*
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* @param $field
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* Field object corresponding to this facet.
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*
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* @param $active_category
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* Optional. This facet's active category.
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*/
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function biblio_field_facet($field, $active_category = NULL) {
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$this->_field = $field;
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$active_path = array();
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if (isset($active_category)) {
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$active_path[] = $active_category;
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}
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parent::faceted_search_facet('biblio_field', $active_path);
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parent::set_weight($field->weight); // Assign default weight.
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}
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/**
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* Return the id of this facet.
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*/
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function get_id() {
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return _biblio_facets_field_to_key($this->_field->tid, $this->_field->fid);
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}
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/**
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* Return the label of this facet. The implementor is responsible to ensure
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* adequate security filtering.
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*/
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function get_label() {
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return check_plain($this->_field->title);
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}
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/**
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* Return the name of the type using this field to help site administrators
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* differenciate fields that use the same name.
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*/
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function get_help() {
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return $this->_field->typename;
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}
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/**
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* Returns the available sort options for this facet.
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*/
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function get_sort_options() {
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$options = parent::get_sort_options();
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$options['field'] = check_plain($this->_field->title);
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return $options;
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}
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/**
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* Handler for the 'count' sort criteria.
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*/
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function build_sort_query_count(&$query) {
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$query->add_orderby('count', 'DESC');
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$query->add_orderby(db_escape_string($this->_field->name), 'ASC');
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}
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/**
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* Handler for the 'field' sort criteria.
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*/
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function build_sort_query_field(&$query) {
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$query->add_orderby(db_escape_string($this->_field->name), 'ASC');
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}
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/**
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* Return the search text for this facet, taking into account this facet's
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* active path.
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*/
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function get_text() {
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if ($category = $this->get_active_category()) {
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return _biblio_facets_field_to_key($this->_field->tid, $this->_field->fid, $category->_value);
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}
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return '';
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}
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/**
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* Updates a query for retrieving the root categories of this facet and their
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* associated nodes within the current search results.
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*
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* @param $query
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* The query object to update.
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*
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* @return
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* FALSE if this facet can't have root categories.
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*/
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function build_root_categories_query(&$query) {
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$query->add_table('biblio', 'vid', 'n', 'vid');
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$query->add_field('biblio', db_escape_string($this->_field->name));
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$query->add_where("n.type = 'biblio'");
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$query->add_where('CHAR_LENGTH(biblio.'. db_escape_string($this->_field->name) .') > 0');
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$query->add_groupby('biblio.'. db_escape_string($this->_field->name));
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if ($this->_field->tid == 0) {
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// If tid is zero, it means the field is common to all types. Don't check
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// for a specific type, but make sure we check only for visible ones.
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$query->add_where('biblio.biblio_type IN ('. implode(', ', array_keys(biblio_facets_types())) .')');
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}
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else {
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$query->add_where('biblio.biblio_type = %d', $this->_field->tid);
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}
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return TRUE;
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}
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/**
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* This factory method creates categories given query results that include the
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* fields selected in get_root_categories_query() or get_subcategories_query().
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*
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* @param $results
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* $results A database query result resource.
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*
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* @return
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* Array of categories.
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*/
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function build_categories($results) {
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$categories = array();
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while ($result = db_fetch_object($results)) {
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$field_name = 'biblio_'. db_escape_string($this->_field->name);
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// Add a new category.
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$categories[] = new biblio_field_category(
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$this->_field,
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$result->$field_name,
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$result->count
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);
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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 for normalized Biblio fields. Each facet represents a Biblio field
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* that's been normalized with the Biblio Normalize module.
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*
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* @see biblio_normalized_field_category
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*/
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class biblio_normalized_field_facet extends biblio_field_facet {
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/**
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* Constructor. Optionally assigns the active category of the facet.
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*
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* @param $field
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* Field object corresponding to this facet.
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*
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* @param $active_category
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* Optional. This facet's active category.
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*/
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function biblio_normalized_field_facet($field, $active_category = NULL) {
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parent::biblio_field_facet($field, $active_category);
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}
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/**
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* Handler for the 'count' sort criteria.
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*/
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function build_sort_query_count(&$query) {
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$query->add_orderby('count', 'DESC');
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$query->add_orderby('biblio_normalize.value', 'ASC');
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}
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/**
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* Handler for the 'field' sort criteria.
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*/
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function build_sort_query_field(&$query) {
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$query->add_orderby('biblio_normalize.value', 'ASC');
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}
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/**
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* Updates a query for retrieving the root categories of this facet and their
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* associated nodes within the current search results.
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*
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* @param $query
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* The query object to update.
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*
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* @return
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* FALSE if this facet can't have root categories.
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*/
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function build_root_categories_query(&$query) {
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$query->add_table('biblio_normalize', 'nid', 'n', 'nid');
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$query->add_field('biblio_normalize', 'value');
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$query->add_where("n.type = 'biblio'");
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$query->add_where('biblio_normalize.fid = %d', $this->_field->fid);
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$query->add_groupby('biblio_normalize_value');
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if ($this->_field->tid == 0) {
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// If tid is zero, it means the field is common to all types. Don't check
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// for a specific type, but make sure we check only for visible ones.
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$query->add_where('biblio_normalize.tid IN ('. implode(', ', array_keys(biblio_facets_types())) .')');
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}
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else {
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$query->add_where('biblio_normalize.tid = %d', $this->_field->tid);
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}
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return TRUE;
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}
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/**
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* This factory method creates categories given query results that include the
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* fields selected in get_root_categories_query() or get_subcategories_query().
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*
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* @param $results
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* $results A database query result resource.
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*
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* @return
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* Array of categories.
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*/
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function build_categories($results) {
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$categories = array();
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while ($result = db_fetch_object($results)) {
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// Add a new category.
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$categories[] = new biblio_normalized_field_category(
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$this->_field,
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$result->biblio_normalize_value,
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$result->count
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);
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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 Biblio fields.
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*
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* @see biblio_field_facet
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*/
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class biblio_field_category extends faceted_search_category {
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var $_field_tid = NULL;
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var $_field_fid = NULL;
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var $_field_name = NULL;
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var $_value = '';
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/**
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* Constructor.
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*/
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function biblio_field_category($field, $value, $count = NULL) {
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parent::faceted_search_category($count);
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$this->_field_tid = $field->tid;
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$this->_field_fid = $field->fid;
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$this->_field_name = $field->name;
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$this->_value = $value;
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}
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/**
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* Return the label of this category.
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*
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* @param $html
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* TRUE when HTML is allowed in the label, FALSE otherwise. Checking this
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| 345 |
* flag allows implementors to provide a rich-text label if desired, and an
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* alternate plain text version for cases where HTML cannot be used. The
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| 347 |
* implementor is responsible to ensure adequate security filtering.
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*/
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function get_label($html = FALSE) {
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return check_plain($this->_value);
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}
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/**
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| 354 |
* Updates a query for selecting nodes matching this category.
|
| 355 |
*
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| 356 |
* @param $query
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* The query object to update.
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| 358 |
*/
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function build_results_query(&$query) {
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| 360 |
// Using tid and field name in table alias to avoid duplicate table names in JOINs
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| 361 |
$alias = 'biblio_'. $this->_field_tid .'_'. $this->_field_fid;
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$query->add_table('biblio', 'vid', 'n', 'vid', $alias);
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$query->add_where("$alias.". db_escape_string($this->_field_name) ." = '%s'", $this->_value);
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| 364 |
if ($this->_field_tid == 0) {
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| 365 |
// If tid is zero, it means the field is common to all types. Don't check
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| 366 |
// for a specific type, but make sure we check only for visible ones.
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| 367 |
$query->add_where("$alias.biblio_type IN (". implode(', ', array_keys(biblio_facets_types())) .')');
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}
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else {
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$query->add_where("$alias.biblio_type = %d", $this->_field_tid);
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}
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}
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}
|
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| 375 |
/**
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| 376 |
* A facet category for normalized Biblio fields.
|
| 377 |
*
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| 378 |
* @see biblio_field_facet
|
| 379 |
*/
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class biblio_normalized_field_category extends biblio_field_category {
|
| 381 |
|
| 382 |
/**
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| 383 |
* Constructor.
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| 384 |
*/
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| 385 |
function biblio_normalized_field_category($field, $value, $count = NULL) {
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| 386 |
parent::biblio_field_category($field, $value, $count);
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}
|
| 388 |
|
| 389 |
/**
|
| 390 |
* Updates a query for selecting nodes matching this category.
|
| 391 |
*
|
| 392 |
* @param $query
|
| 393 |
* The query object to update.
|
| 394 |
*/
|
| 395 |
function build_results_query(&$query) {
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| 396 |
// Using tid and field name in table alias to avoid duplicate table names in JOINs
|
| 397 |
$alias = 'biblio_normalize_'. $this->_field_tid .'_'. $this->_field_fid;
|
| 398 |
$query->add_table('biblio_normalize', 'nid', 'n', 'nid', $alias);
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| 399 |
$query->add_where("$alias.value = '%s'", $this->_value);
|
| 400 |
if ($this->_field_tid == 0) {
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| 401 |
// If tid is zero, it means the field is common to all types. Don't check
|
| 402 |
// for a specific type, but make sure we check only for visible ones.
|
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$query->add_where("$alias.tid IN (". implode(', ', array_keys(biblio_facets_types())) .')');
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}
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else {
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$query->add_where("$alias.tid = %d", $this->_field_tid);
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}
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}
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}
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| 410 |
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| 411 |
// --------------------------------------------------------------------------
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| 412 |
// Internal stuff
|
| 413 |
|
| 414 |
/**
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| 415 |
* Retrieves a specified Biblio type, or all visible Biblio types.
|
| 416 |
*
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| 417 |
* @param $tid
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| 418 |
* Optional. The id of the Biblio type to retrieve. If omitted, all
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| 419 |
* visible Biblio types are returned.
|
| 420 |
*
|
| 421 |
* @return
|
| 422 |
* Type object if a specific $tid was requested, or an array of type objects
|
| 423 |
* otherwise.
|
| 424 |
*/
|
| 425 |
function biblio_facets_types($tid = 0) {
|
| 426 |
static $types = NULL;
|
| 427 |
if (!isset($types)) {
|
| 428 |
$types = array();
|
| 429 |
$results = db_query('SELECT tid, name, weight FROM {biblio_types} WHERE tid > 0 AND visible = 1 ORDER BY weight, name', $tid);
|
| 430 |
while ($type = db_fetch_object($results)) {
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| 431 |
$types[$type->tid] = $type;
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| 432 |
}
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| 433 |
}
|
| 434 |
if ($tid == 0) {
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| 435 |
return $types;
|
| 436 |
}
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| 437 |
else {
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| 438 |
return $types[$tid];
|
| 439 |
}
|
| 440 |
}
|
| 441 |
|
| 442 |
/**
|
| 443 |
* Retrieves all fields provided by Biblio (common fields and
|
| 444 |
* type-specific fields).
|
| 445 |
*
|
| 446 |
* @return
|
| 447 |
* Array of field objects. A field object has the following attributes: tid
|
| 448 |
* (Biblio type id), fid (Biblio field id), title, name (database column in
|
| 449 |
* the Biblio table), weight. A tid of 0 denotes a field that's common to all
|
| 450 |
* Biblio types.
|
| 451 |
*/
|
| 452 |
function _biblio_facets_get_fields() {
|
| 453 |
$fields = array();
|
| 454 |
// Note: The Biblio module has a visible attribute at the field level, but
|
| 455 |
// doesn't seem to use it at the moment. If that changes, we might have to add
|
| 456 |
// a condition for field visibility.
|
| 457 |
$results = db_query('SELECT 0 AS tid, f.fid, f.title, f.name, f.weight, \'common\' AS typename FROM {biblio_fields} f WHERE f.common = 1 UNION SELECT d.tid, d.fid, d.title, f.name, d.weight, t.name AS typename FROM {biblio_type_details} d INNER JOIN {biblio_types} t ON t.tid = d.tid INNER JOIN {biblio_fields} f ON f.fid = d.fid WHERE t.visible = 1');
|
| 458 |
while ($field = db_fetch_object($results)) {
|
| 459 |
$key = _biblio_facets_field_to_key($field->tid, $field->fid);
|
| 460 |
$fields[$key] = $field;
|
| 461 |
}
|
| 462 |
return $fields;
|
| 463 |
}
|
| 464 |
|
| 465 |
/**
|
| 466 |
* Returns a composite key with the specified field info.
|
| 467 |
*/
|
| 468 |
function _biblio_facets_field_to_key($tid, $fid, $value = NULL) {
|
| 469 |
$key = $tid .'.'. $fid;
|
| 470 |
if (isset($value)) {
|
| 471 |
// Escape double-quotes in the value and enclose it between double-quotes.
|
| 472 |
$key .= ':"'. strtr($value, '"', '""') .'"';
|
| 473 |
}
|
| 474 |
return $key;
|
| 475 |
}
|
| 476 |
|
| 477 |
/**
|
| 478 |
* Extracts field info from the specified composite key.
|
| 479 |
*
|
| 480 |
* @return
|
| 481 |
* Array with tid, fid, and additional value (if any).
|
| 482 |
*/
|
| 483 |
function _biblio_facets_key_to_field($key) {
|
| 484 |
$components = explode(':', $key, 2);
|
| 485 |
if (isset($components[1])) {
|
| 486 |
// Unescape double-quotes, then trim surrounding double-quotes from value.
|
| 487 |
$value = trim(strtr($components[1], '""', '"'), '"');
|
| 488 |
}
|
| 489 |
$components = explode('.', $components[0], 2);
|
| 490 |
if (isset($value)) {
|
| 491 |
$components[] = $value;
|
| 492 |
}
|
| 493 |
return $components;
|
| 494 |
}
|
| 495 |
|
| 496 |
// TODO: Use faceted_search_quoted_query_extract()
|
| 497 |
function _biblio_facets_quoted_query_extract($keys, $option) {
|
| 498 |
// Based on search_query_extract, but keys terminate on a double-quote
|
| 499 |
// followed by a space rather than a single space.
|
| 500 |
if (preg_match('/(^| )'. $option .':(.*?)(" |$)/i', $keys, $matches)) {
|
| 501 |
return $matches[2];
|
| 502 |
}
|
| 503 |
}
|
| 504 |
|
| 505 |
// TODO: Use faceted_search_quoted_query_insert()
|
| 506 |
function _biblio_facets_quoted_query_insert($keys, $option, $value = '') {
|
| 507 |
// Based on search_query_insert, but keys terminate on a double-quote followed
|
| 508 |
// by a space rather than a single space.
|
| 509 |
if (search_query_extract($keys, $option)) {
|
| 510 |
$keys = trim(preg_replace('/(^| )'. $option .':(.*?)(" |$)/i', ' ', $keys));
|
| 511 |
}
|
| 512 |
if ($value != '') {
|
| 513 |
$keys .= ' '. $option .':'. $value;
|
| 514 |
}
|
| 515 |
return $keys;
|
| 516 |
}
|
| 517 |
|