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<?php
/**
* Elgg core search.
*
* @package Elgg
* @subpackage Core
* @author Curverider Ltd <info@elgg.com>, The MITRE Corporation <http://www.mitre.org>
* @link http://elgg.org/
*/
/**
* Initialise search helper functions.
*
*/
function search_init() {
global $CONFIG;
// page handler for search actions and results
register_page_handler('search','search_page_handler');
// hook into the search callback to use the metadata system (this is the part that will go away!)
register_plugin_hook('search:entities', 'all', 'search_original_hook');
// list of available search types should include our base parts
register_plugin_hook('searchtypes', 'all', 'search_base_search_types_hook');
// add in CSS for search elements
extend_view('css', 'search/css');
}
/**
* Page handler for search
*
* @param array $page Page elements from pain page handler
*/
function search_page_handler($page) {
global $CONFIG;
if(!get_input('tag')) {
set_input('tag', $page[0]);
}
include_once($CONFIG->path . "mod/search/index.php");
}
/**
* Core search hook.
* Returns an object with two parts:
* ->entities: an array of instantiated entities that have been decorated with
* volatile "search" data indicating what they matched. These are
* the entities to be displayed to the user on this page.
* ->total: total number of entities overall. This function can update this
* limit to ask for more pages in the pagination.
*/
function search_original_hook($hook, $type, $returnvalue, $params) {
$tag = $params['tag'];
$offset = $params['offset']; // starting page
$limit = $params['limit']; // number per page
$searchtype = $params['searchtype']; // the search type we're looking for
$object_type = $params['object_type'];
$subtype = $params['subtype'];
$owner_guid = $params['owner_guid'];
$tagtype = $params['tagtype'];
$count = get_entities_from_metadata($tagtype, elgg_strtolower($tag), $object_type, $subtype, $owner_guid, $limit, $offset, "", 0, TRUE, FALSE);
$ents = get_entities_from_metadata($tagtype, elgg_strtolower($tag), $object_type, $subtype, $owner_guid, $limit, $offset, "", 0, FALSE, FALSE);
/*
* Foreach entity
* get the metadata keys
* If the value matches, hang onto the key
* add all the matched keys to VolatileData
* This tells us *why* each entity matched
*/
foreach ($ents as $ent) {
$metadata = get_metadata_for_entity($ent->getGUID());
$matched = array();
if ($metadata) {
foreach ($metadata as $tuple) {
if ($tag === $tuple->value) {
// This is one of the matching elements
$matched[] = $tuple->name;
}
}
$ent->setVolatileData('search', $matched);
}
}
// merge in our entities with any coming in from elsewhere
$returnvalue->entities = array_merge($returnvalue->entities, $ents);
// expand the total entity count if necessary
if ($count > $returnvalue->total) {
$returnvalue->total = $count;
}
return $returnvalue;
}
/**
* return our base search types (right now, we have none)
*/
function search_base_search_types_hook($hook, $type, $returnvalue, $params) {
if (!is_array($returnvalue)) {
$returnvalue = array();
}
return $returnvalue;
}
/** Register init system event **/
register_elgg_event_handler('init','system','search_init');
?>
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