Fixes #41: User full text search. See caveats in function search_for_user()

git-svn-id: https://code.elgg.org/elgg/trunk@967 36083f99-b078-4883-b0ff-0f9b5a30f544

2 files changed, 27 insertions, 3 deletions

diff --git a/engine/lib/users.php b/engine/lib/users.php
index 16e7a2c5f..50e9d11ea 100644
--- a/engine/lib/users.php
+++ b/engine/lib/users.php
@@ -682,6 +682,27 @@
 		

 		return false;

 	}

+	
+	/**
+	 * Searches for a user based on a complete or partial name or username using full text searching.
+	 * 
+	 * IMPORTANT NOTE: With MySQL's default setup:
+	 * 1) $criteria must be 4 or more characters long
+	 * 2) If $criteria matches greater than 50% of results NO RESULTS ARE RETURNED!
+	 *
+	 * @param string $criteria The partial or full name or username.
+	 */
+	function search_for_user($criteria)
+	{
+		global $CONFIG;
+		
+		$criteria = sanitise_string($criteria);
+		$access = get_access_sql_suffix("e");
+		
+		$query = "select e.* from {$CONFIG->dbprefix}entities e join {$CONFIG->dbprefix}users_entity u on e.guid=u.guid where match(u.name,u.username) against ('$criteria') and $access";
+		
+		return get_data($query, "entity_row_to_elggstar");
+	}
 	

 	/**

 	 * Registers a user, returning false if the username already exists

diff --git a/engine/schema/mysql.sql b/engine/schema/mysql.sql
index c981b0a56..749ee5bcf 100644
--- a/engine/schema/mysql.sql
+++ b/engine/schema/mysql.sql
@@ -104,7 +104,8 @@ CREATE TABLE `prefix_objects_entity` (
   `title` text NOT NULL,

   `description` text NOT NULL,

 

-  PRIMARY KEY  (`guid`)

+  PRIMARY KEY  (`guid`),
+  FULLTEXT KEY (`title`,`description`)

 )  ;

 

 -- Extra information relating to "sites"

@@ -116,7 +117,8 @@ CREATE TABLE `prefix_sites_entity` (
   `url` varchar(255) NOT NULL, 

    

   PRIMARY KEY  (`guid`),

-  UNIQUE KEY (`url`)

+  UNIQUE KEY (`url`),
+  FULLTEXT KEY (`name`,`description`, `url`)

 )  ;

 

 -- Extra information relating to "users"

@@ -138,7 +140,8 @@ CREATE TABLE `prefix_users_entity` (
   

   PRIMARY KEY  (`guid`),

   KEY `password` (`password`),

-  FULLTEXT KEY `name` (`name`)

+  FULLTEXT KEY `name` (`name`),
+  FULLTEXT KEY (`name`,`username`)

 ) ENGINE=MyISAM;