From 389b0a5862a9f4130ca0765ba6155d81bd84499b Mon Sep 17 00:00:00 2001
From: ben <ben@36083f99-b078-4883-b0ff-0f9b5a30f544>
Date: Mon, 7 Apr 2008 14:40:53 +0000
Subject: Properly extensible canEdit functionality for metadata, annotations,
 and anything else that supports the ElggExtender interface

git-svn-id: https://code.elgg.org/elgg/trunk@410 36083f99-b078-4883-b0ff-0f9b5a30f544
---
 engine/lib/extender.php | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

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

diff --git a/engine/lib/extender.php b/engine/lib/extender.php
index 4f588acdd..aca8a0fca 100644
--- a/engine/lib/extender.php
+++ b/engine/lib/extender.php
@@ -69,6 +69,16 @@
 		 * Delete this data.
 		 */
 		abstract public function delete();
+		
+		/**
+		 * Determines whether or not the specified user can edit this
+		 *
+		 * @param int $user_guid The GUID of the user (defaults to currently logged in user)
+		 * @return true|false
+		 */
+		function canEdit($user_guid = 0) {
+			return can_edit_extender($this->id,$this->type,$user_guid);
+		}
 		
 		public function export()
 		{
@@ -145,6 +155,32 @@
 			return $tmp;
 		}
 	}
+	
+	/**
+	 * Determines whether or not the specified user can edit the specified piece of extender
+	 *
+	 * @param int $extender_id The ID of the piece of extender
+	 * @param string $type 'metadata' or 'annotation'
+	 * @param int $user_guid The GUID of the user
+	 * @return true|false
+	 */
+	function can_edit_extender($extender_id, $type, $user_guid = 0) {
+		
+		if ($user_guid == 0) {
+			$user = $_SESSION['user'];
+		} else {
+			$user = get_entity($user_guid);
+		}
+		$functionname = "get_{$type}";
+		if (is_callable($functionname)) {
+			$extender = $functionname($extender_id);
+		} else return false;
+		
+		if ($extender->getOwner() == $user->getGUID()) return true;
+		
+		return trigger_plugin_hook('permissions_check',$type,array('entity' => $entity, 'user' => $user),false);
+		
+	}
 	
 	/** Register the hook */
 	register_plugin_hook("import", "all", "import_extender_plugin_hook", 2);
-- 
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