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<?php
/**
* Elgg library
* Contains important functionality core to Elgg
*
* @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/
*/
/**
* Getting directories and moving the browser
*/
/**
* Adds messages to the session so they'll be carried over, and forwards the browser.
* Returns false if headers have already been sent and the browser cannot be moved.
*
* @param string $location URL to forward to browser to
* @return nothing|false
*/
function forward($location) {
if (!headers_sent()) {
$_SESSION['messages'] = system_messages();
header("Location: {$location}");
exit;
}
return false;
}
/**
* Templating
*/
/**
* Handles templating views
*
* @param string $view The name and location of the view to use
* @param array $vars Any variables that the view requires, passed as an array
* @param string $viewtype Optionally, the type of view that we're using (most commonly 'default')
* @param boolean $debug If set to true, the viewer will complain if it can't find a view
* @return string The HTML content
*/
function elgg_view($view, $vars = "", $viewtype = "", $debug = false) {
global $CONFIG, $strings;
static $usercache;
if (!is_array($usercache)) {
$usercache = array();
}
if (empty($vars)) {
$vars = array();
}
// Load session and configuration variables
if (is_array($_SESSION)) {
$vars = array_merge($vars, $_SESSION);
}
if (!empty($CONFIG))
$vars = array_merge($vars, get_object_vars($CONFIG));
if (is_callable('page_owner')) {
$vars['page_owner'] = page_owner();
} else {
$vars['page_owner'] = -1;
}
if ($vars['page_owner'] != -1) {
if (!isset($usercache[$vars['page_owner']])) {
$vars['page_owner_user'] = get_user($vars['page_owner']);
$usercache[$vars['page_owner']] = $vars['page_owner_user'];
} else {
$vars['page_owner_user'] = $usercache[$vars['page_owner']];
}
}
if (empty($_SESSION['view'])) {
$_SESSION['view'] = "default";
}
if (empty($viewtype) && is_callable('get_input'))
$viewtype = get_input('view');
if (empty($viewtype)) {
$viewtype = $_SESSION['view'];
}
ob_start();
if (!@include($CONFIG->viewpath . "views/{$viewtype}/{$view}.php")) {
$success = false;
if ($viewtype != "default") {
if (@include($CONFIG->viewpath . "views/default/{$view}.php")) {
$success = true;
}
}
if (!$success && $debug == true) {
echo " [This view ({$view}) does not exist] ";
}
}
$content = ob_get_clean();
return $content;
}
/**
* Library loading and handling
*/
/**
* Recursive function designed to load library files on start
* (NB: this does not include plugins.)
*
* @param string $directory Full path to the directory to start with
* @param string $file_exceptions A list of filenames (with no paths) you don't ever want to include
* @param string $file_list A list of files that you know already you want to include
* @return array Array of full filenames
*/
function get_library_files($directory, $file_exceptions = array(), $file_list = array()) {
if (is_file($directory)) {
$file_list[] = $directory;
} else if ($handle = opendir($directory)) {
while ($file = readdir($handle)) {
if (!in_array($file,$file_exceptions)) {
$file_list = get_library_files($directory . "/" . $file, $file_exceptions, $file_list);
}
}
}
return $file_list;
}
/**
* Ensures that the installation has all the correct files, that PHP is configured correctly, and so on.
* Leaves appropriate messages in the error register if not.
*
* @return true|false True if everything is ok (or Elgg is fit enough to run); false if not.
*/
function sanitised() {
$sanitised = true;
if (!file_exists(dirname(dirname(__FILE__)) . "/settings.php")) {
register_error(elgg_view("messages/sanitisation/settings"));
$sanitised = false;
}
return $sanitised;
}
/**
* Registers
*/
/**
* Message register handling
* If no parameter is given, the function returns the array of messages so far and empties it.
* Otherwise, any message or array of messages is added.
*
* @param string|array $message Optionally, a single message or array of messages to add
* @param string $register By default, "errors". This allows for different types of messages, eg errors.
* @return true|false|array Either the array of messages, or a response regarding whether the message addition was successful
*/
function system_messages($message = null, $register = "messages", $count = false) {
static $messages;
if (!isset($messages)) {
$messages = array();
}
if (!isset($messages[$register]) && !empty($register)) {
$messages[$register] = array();
}
if (!$count) {
if (!empty($message) && is_array($message)) {
$messages[$register] = array_merge($messages[$register], $message);
return true;
} else if (!empty($message) && is_string($message)) {
$messages[$register][] = $message;
return true;
} else if (!is_string($message) && !is_array($message)) {
if (!empty($register)) {
$returnarray = $messages[$register];
$messages[$register] = array();
} else {
$returnarray = $messages;
$messages = array();
}
return $returnarray;
}
} else {
if (!empty($register)) {
return sizeof($messages[$register]);
} else {
$count = 0;
foreach($messages as $register => $submessages) {
$count += sizeof($submessages);
}
return $count;
}
}
return false;
}
/**
* An alias for system_messages($message) to handle standard user information messages
*
* @param string|array $message Message or messages to add
* @return true|false Success response
*/
function system_message($message) {
return system_messages($message, "messages");
}
/**
* An alias for system_messages($message) to handle error messages
*
* @param string|array $message Error or errors to add
* @return true|false Success response
*/
function register_error($error) {
return system_messages($error, "errors");
}
/**
* Counts the number of messages, either globally or in a particular register
*
* @param string $register Optionally, the register
* @return integer The number of messages
*/
function count_messages($register = "") {
return system_messages(null,$register,true);
}
?>
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