New module 'Autocomplete Widgets'
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<?php
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/**
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* @file
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* Common functions for Autocomplete Widgets module.
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*/
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/**
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* Fetch an array of options for the given widget.
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*
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* @param $field
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* The field description.
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* @param $string
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* Optional string to filter values on (used by autocomplete).
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* @param $match
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* Operator to match filtered name against, can be any of:
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* 'contains', 'equals', 'starts_with'
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* @param $keys
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* Optional keys to lookup (the $string and $match arguments will be
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* ignored).
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* @param $limit
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* If non-zero, limit the size of the result set.
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*
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* @return
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* An array of valid values in the form:
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* array(
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* key => value,
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* ...
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* )
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*/
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function _autocomplete_widgets_get_options($field, $string = '', $match = 'contains', $keys = NULL, $limit = NULL) {
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static $results = array();
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// Create unique id for static cache.
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if (!isset($keys) || !is_array($keys)) {
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$keys = array();
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}
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$cid = $field['field_name'] .':'. $match .':'. ($string !== '' ? $string : implode('-', $keys)) .':'. $limit;
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if (!isset($results[$cid])) {
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if ($field['widget']['type'] == 'autocomplete_widgets_allowvals') {
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$results[$cid] = _autocomplete_widgets_get_options_allowvals($field, $string, $match, $keys, $limit);
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}
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else if ($field['widget']['type'] == 'autocomplete_widgets_flddata') {
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$results[$cid] = _autocomplete_widgets_get_options_flddata($field, $string, $match, $keys, $limit);
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}
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else {
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$results[$cid] = array();
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}
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}
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return $results[$cid];
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}
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/**
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* Fetch an array of options for the given widget (allowed values).
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*
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* Options are retrieved from the allowed values defined for the field.
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*/
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function _autocomplete_widgets_get_options_allowvals($field, $string = '', $match = 'contains', $keys = NULL, $limit = NULL) {
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$function = $field['module'] .'_allowed_values';
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$allowed_values = (array)(function_exists($function) ? $function($field) : content_allowed_values($field));
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if (!isset($limit) || !is_numeric($limit)) {
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$limit = count($allowed_values);
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}
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$case_insensitive = (!empty($field['widget']['autocomplete_case']) ? FALSE : TRUE);
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if ($case_insensitive && $match != 'equals') {
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$string = drupal_strtolower($string);
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}
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$filter_xss = !empty($field['widget']['autocomplete_xss']);
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$count = 0;
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$options = array();
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foreach ($allowed_values as $key => $value) {
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if ($filter_xss) {
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// Filter all HTML in $value, then trim white spaces.
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$value = trim(filter_xss($value, array()));
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}
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if ($string === '') {
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if (isset($keys) && is_array($keys)) {
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if (in_array($key, $keys)) {
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$options[$key] = $value;
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$count++;
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}
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}
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else {
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$options[$key] = $value;
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$count++;
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}
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}
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else if ($match == 'equals') {
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if ($value == $string) {
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$options[$key] = $value;
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$count++;
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}
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}
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else {
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$pos = strpos(($case_insensitive ? drupal_strtolower($value) : $value), $string);
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if (($match == 'starts_with' && $pos === 0) || ($match == 'contains' && $pos !== FALSE)) {
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$options[$key] = $value;
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$count++;
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}
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}
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if ($count >= $limit) {
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break;
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}
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}
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return $options;
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}
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/**
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* Fetch an array of options for the given widget (field data).
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*
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* Options are retrieved from existing values for the field.
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*/
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function _autocomplete_widgets_get_options_flddata($field, $string = '', $match = 'contains', $keys = NULL, $limit = NULL) {
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$db_info = content_database_info($field);
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$table = $db_info['table'];
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$column = $field['field_name'] .'_'. key($db_info['columns']);
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$where = array();
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$args = array();
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if ($string !== '') {
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$lower = (!empty($field['widget']['autocomplete_case']) || $match == 'equals' ? '' : 'LOWER');
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$match_operators = array(
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'contains' => "LIKE $lower('%%%s%%')",
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'equals' => "= '%s'",
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'starts_with' => "LIKE $lower('%s%%')",
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);
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$where[] = "$lower(f.". $column .') '. (isset($match_operators[$match]) ? $match_operators[$match] : $match_operators['contains']);
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$args[] = $string;
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}
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else if (isset($keys) && is_array($keys)) {
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$where[] = 'f.'. $column .' IN ('. db_placeholders($keys) .')';
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$args = array_merge($args, $keys);
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}
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// When obey_access_controls is enabled, we need to add node status
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// to the where clause before the sql is combined.
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if(!empty($field['widget']['obey_access_controls'])) {
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$where[] = 'n.status = 1 ';
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}
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$sql = 'SELECT f.'. $column .' FROM {'. $table .'} f WHERE '. implode(' AND ', $where) .' ORDER BY f.'. $column;
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if (!empty($field['widget']['obey_access_controls']) || !empty($field['widget']['i18n_flddata'])) {
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// Adding a join with the node table allows the i18n rewrite the query
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// to filter values from node for the proper language.
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$sql = db_rewrite_sql(str_replace(' WHERE ', ' INNER JOIN {node} n ON f.vid = n.vid WHERE ', $sql));
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}
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$result = $limit ? db_query_range($sql, $args, 0, $limit) : db_query($sql, $args);
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$options = array();
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while ($row = db_fetch_object($result)) {
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$options[$row->$column] = $row->$column;
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}
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return $options;
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}
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