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<?php
/**
* Elgg page owner library
* Contains functions for managing page ownership
*
* @package Elgg
* @subpackage Core
* @author Curverider Ltd
* @link http://elgg.org/
*/
/**
* Gets the page owner for the current page.
* @uses $CONFIG
* @return int|false The current page owner guid (0 if none).
*/
function page_owner() {
global $CONFIG;
$returnval = NULL;
$setpageowner = set_page_owner();
if ($setpageowner !== false) {
return $setpageowner;
}
if ((!isset($returnval)) && ($username = get_input("username"))) {
if (substr_count($username,'group:')) {
preg_match('/group\:([0-9]+)/i',$username,$matches);
$guid = $matches[1];
if ($entity = get_entity($guid)) {
$returnval = $entity->getGUID();
}
}
if ((!isset($returnval)) && ($user = get_user_by_username($username))) {
$returnval = $user->getGUID();
}
}
if ((!isset($returnval)) && ($owner = get_input("owner_guid"))) {
if ($user = get_entity($owner)) {
$returnval = $user->getGUID();
}
}
if ((!isset($returnval)) && (!empty($CONFIG->page_owner_handlers) && is_array($CONFIG->page_owner_handlers))) {
foreach($CONFIG->page_owner_handlers as $handler) {
if ((!isset($returnval)) && ($guid = $handler())) {
$returnval = $guid;
}
}
}
if (isset($returnval)) {
// Check if this is obtainable, forwarding if not.
/*
* If the owner entity has been set, but is inaccessible then we forward to the dashboard. This
* catches a bunch of WSoDs. It doesn't have much of a performance hit since 99.999% of the time the next thing
* a page does after calling this function is to retrieve the owner entity - which is of course cashed.
*/
$owner_entity = get_entity($returnval);
if (!$owner_entity) {
// Log an error
error_log(sprintf(elgg_echo('pageownerunavailable'), $returnval));
// Forward
forward();
}
return $returnval;
}
return 0;
}
/**
* Gets the page owner for the current page.
* @uses $CONFIG
* @return ElggUser|false The current page owner (false if none).
*/
function page_owner_entity() {
global $CONFIG;
$page_owner = page_owner();
if ($page_owner > 0)
return get_entity($page_owner);
return false;
//return new ElggDummy();
}
/**
* Adds a page owner handler - a function that will
* return the page owner if required
* (Such functions are required to return false if they don't know)
* @uses $CONFIG
* @param string $functionname The name of the function to call
* @return mixed The guid of the owner or false
*/
function add_page_owner_handler($functionname) {
global $CONFIG;
if (empty($CONFIG->page_owner_handlers)) {
$CONFIG->page_owner_handlers = array();
}
if (is_callable($functionname)) {
$CONFIG->page_owner_handlers[] = $functionname;
}
}
/**
* Allows a page to manually set a page owner
*
* @param int $entitytoset The GUID of the page owner
* @return int|false Either the page owner we've just set, or false if unset
*/
function set_page_owner($entitytoset = -1) {
static $entity;
if (!isset($entity)) $entity = false;
if ($entitytoset > -1) {
$entity = $entitytoset;
}
return $entity;
}
/**
* Sets the functional context of a page
*
* @param string $context The context of the page
* @return string|false Either the context string, or false on failure
*/
function set_context($context) {
global $CONFIG;
if (!empty($context)) {
$context = trim($context);
$context = strtolower($context);
$CONFIG->context = $context;
return $context;
} else {
return false;
}
}
/**
* Returns the functional context of a page
*
* @return string The context, or 'main' if no context has been provided
*/
function get_context() {
global $CONFIG;
if (isset($CONFIG->context) && !empty($CONFIG->context)) {
return $CONFIG->context;
}
if ($context = get_plugin_name(true)) {
return $context;
}
return "main";
}
if (defined('context')) {
global $CONFIG;
$CONFIG->context = context;
}
?>
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