Pulling in MITRE's search core. Fo'rizzle this time. Yo.

git-svn-id: http://code.elgg.org/elgg/trunk@3572 36083f99-b078-4883-b0ff-0f9b5a30f544

1 files changed, 116 insertions, 0 deletions

diff --git a/mod/search/start.php b/mod/search/start.php
new file mode 100644
index 000000000..24b038c7a
--- /dev/null
+++ b/mod/search/start.php
@@ -0,0 +1,116 @@
+<?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');
+
+?>