From fbac997a10e9ab2fb3f04b2a33635f3434ddd5e3 Mon Sep 17 00:00:00 2001
From: ben <ben@36083f99-b078-4883-b0ff-0f9b5a30f544>
Date: Mon, 21 Apr 2008 17:26:25 +0000
Subject: Fixed user GUID and multiple metadata bugs

git-svn-id: https://code.elgg.org/elgg/trunk@510 36083f99-b078-4883-b0ff-0f9b5a30f544
---
 engine/lib/metadata.php | 30 ++++++++++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

(limited to 'engine/lib/metadata.php')

diff --git a/engine/lib/metadata.php b/engine/lib/metadata.php
index aba7e782d..06c187a70 100644
--- a/engine/lib/metadata.php
+++ b/engine/lib/metadata.php
@@ -138,6 +138,27 @@
 				
 		return row_to_elggmetadata(get_data_row("SELECT m.*, n.string as name, v.string as value from {$CONFIG->dbprefix}metadata m JOIN {$CONFIG->dbprefix}metastrings v on m.value_id = v.id JOIN {$CONFIG->dbprefix}metastrings n on m.name_id = n.id where m.id=$id and (m.access_id in {$access} or (m.access_id = 0 and m.owner_guid = {$_SESSION['id']}))"));
 	}
+	
+	/**
+	 * Removes metadata on an entity with a particular name
+	 *
+	 * @param int $entity_guid The entity GUID
+	 * @param string $name The name of the entity
+	 * @return true|false Depending on success
+	 */
+	function remove_metadata($entity_guid, $name) {
+		
+		global $CONFIG;
+		$entity_guid = (int) $entity_guid;
+		$name = sanitise_string(trim($name));
+		if ($existing = get_data("SELECT * from {$CONFIG->dbprefix}metadata WHERE entity_guid = $entity_guid and name_id=" . add_metastring($name))) {
+			foreach($existing as $ex)
+				delete_metadata($ex->id);
+			return true;
+		}
+		return false;
+		
+	}
 	
 	/**
 	 * Create a new metadata object, or update an existing one.
@@ -169,14 +190,14 @@
 		$id = false;
 	
 		$existing = get_data_row("SELECT * from {$CONFIG->dbprefix}metadata WHERE entity_guid = $entity_guid and name_id=" . add_metastring($name) . " limit 1");
-		if (($existing) && (!$allow_multiple)) 
+		if (($existing) && (!$allow_multiple) && (!empty($value))) 
 		{
 			$id = $existing->id;
 			$result = update_metadata($id, $name, $value, $value_type, $owner_guid, $access_id);
 			
 			if (!$result) return false;
 		}
-		else
+		else if (!empty($value))
 		{
 			// Add the metastrings
 			$value = add_metastring($value);
@@ -187,6 +208,11 @@
 			
 			// If ok then add it
 			$id = insert_data("INSERT into {$CONFIG->dbprefix}metadata (entity_guid, name_id, value_id, value_type, owner_guid, time_created, access_id) VALUES ($entity_guid, '$name','$value','$value_type', $owner_guid, $time, $access_id)");
+		} else if ($existing) {
+			
+			$id = $existing->id;
+			delete_metadata($id);
+			
 		}
 		
 		return $id;
-- 
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