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<?php
/**
* Elgg page owner library
* Contains functions for managing page ownership
*
* @package Elgg
* @subpackage Core
* @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
* @author Curverider Ltd
* @copyright Curverider Ltd 2008
* @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;
$setpageowner = set_page_owner();
if ($setpageowner !== false) {
return $setpageowner;
}
if ($username = get_input("username")) {
if ($user = get_user_by_username($username)) {
return $user->getGUID();
} else {
return 0;
}
}
if ($owner = get_input("owner_guid")) {
if ($user = get_user($owner)) {
return $user->getGUID();
} else {
return 0;
}
}
if (!empty($CONFIG->page_owner_handlers) && is_array($CONFIG->page_owner_handlers)) {
foreach($CONFIG->page_owner_handlers as $handler) {
if ($guid = $handler()) {
return $guid;
}
}
}
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_user($page_owner);
return false;
}
/**
* 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";
}
?>
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