1 files changed, 114 insertions, 0 deletions
diff --git a/engine/classes/ElggMetadata.php b/engine/classes/ElggMetadata.php
new file mode 100644
index 000000000..631b73c8f
--- /dev/null
+++ b/engine/classes/ElggMetadata.php
@@ -0,0 +1,114 @@
+<?php
+
+/**
+ * ElggMetadata
+ * This class describes metadata that can be attached to ElggEntities.
+ *
+ * @author Curverider Ltd <info@elgg.com>
+ * @package Elgg
+ * @subpackage Core
+ */
+class ElggMetadata extends ElggExtender {
+	/**
+	 * Construct a new site object, optionally from a given id value or row.
+	 *
+	 * @param mixed $id
+	 */
+	function __construct($id = null) {
+		$this->attributes = array();
+
+		if (!empty($id)) {
+			// Create from db row
+			if ($id instanceof stdClass) {
+				$metadata = $id;
+			} else {
+				$metadata = get_metadata($id);
+			}
+
+			if ($metadata) {
+				$objarray = (array) $metadata;
+				foreach($objarray as $key => $value) {
+					$this->attributes[$key] = $value;
+				}
+				$this->attributes['type'] = "metadata";
+			}
+		}
+	}
+
+	/**
+	 * Class member get overloading
+	 *
+	 * @param string $name
+	 * @return mixed
+	 */
+	function __get($name) {
+		return $this->get($name);
+	}
+
+	/**
+	 * Class member set overloading
+	 *
+	 * @param string $name
+	 * @param mixed $value
+	 * @return mixed
+	 */
+	function __set($name, $value) {
+		return $this->set($name, $value);
+	}
+
+	/**
+	 * Determines whether or not the user can edit this piece of metadata
+	 *
+	 * @return true|false Depending on permissions
+	 */
+	function canEdit() {
+		if ($entity = get_entity($this->get('entity_guid'))) {
+			return $entity->canEditMetadata($this);
+		}
+		return false;
+	}
+
+	/**
+	 * Save matadata object
+	 *
+	 * @return int the metadata object id
+	 */
+	function save() {
+		if ($this->id > 0) {
+			return update_metadata($this->id, $this->name, $this->value, $this->value_type, $this->owner_guid, $this->access_id);
+		} else {
+			$this->id = create_metadata($this->entity_guid, $this->name, $this->value, $this->value_type, $this->owner_guid, $this->access_id);
+			if (!$this->id) {
+				throw new IOException(sprintf(elgg_echo('IOException:UnableToSaveNew'), get_class()));
+			}
+			return $this->id;
+		}
+	}
+
+	/**
+	 * Delete a given metadata.
+	 */
+	function delete() {
+		return delete_metadata($this->id);
+	}
+
+	/**
+	 * Get a url for this item of metadata.
+	 *
+	 * @return string
+	 */
+	public function getURL() {
+		return get_metadata_url($this->id);
+	}
+
+	// SYSTEM LOG INTERFACE ////////////////////////////////////////////////////////////
+
+	/**
+	 * For a given ID, return the object associated with it.
+	 * This is used by the river functionality primarily.
+	 * This is useful for checking access permissions etc on objects.
+	 */
+	public function getObjectFromID($id) {
+		return get_metadata($id);
+	}
+}
+\ No newline at end of file