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<?php
/**
* Elgg Annotations
*
* Annotations allow you to attach bits of information to entities.
* They are essentially the same as metadata, but with additional
* helper functions.
*
* @package Elgg.Core
* @subpackage DataModel.Annotations
* @link http://docs.elgg.org/DataModel/Annotations
*/
class ElggAnnotation extends ElggExtender {
/**
* Construct a new annotation, optionally from a given id value or db object.
*
* @param mixed $id
*/
function __construct($id = null) {
$this->attributes = array();
if (!empty($id)) {
if ($id instanceof stdClass) {
$annotation = $id;
} else {
$annotation = get_annotation($id);
}
if ($annotation) {
$objarray = (array) $annotation;
foreach($objarray as $key => $value) {
$this->attributes[$key] = $value;
}
$this->attributes['type'] = "annotation";
}
}
}
/**
* 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 $value
* @return void
*/
function __set($name, $value) {
return $this->set($name, $value);
}
/**
* Save this instance
*
* @return int an object id
*/
function save() {
if ($this->id > 0) {
return update_annotation($this->id, $this->name, $this->value, $this->value_type, $this->owner_guid, $this->access_id);
} else {
$this->id = create_annotation($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 $this->id;
}
}
/**
* Delete the annotation.
*/
function delete() {
return delete_annotation($this->id);
}
/**
* Get a url for this annotation.
*
* @return string
*/
public function getURL() {
return get_annotation_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_annotation($id);
}
}
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