url . $location;
}
header("Location: {$location}");
exit;
}
return false;
}
/**
* Return the current page URL.
*/
function current_page_url() {
global $CONFIG;
$url = parse_url($CONFIG->wwwroot);
$page = $url['scheme'] . "://";
// user/pass
if ((isset($url['user'])) && ($url['user'])) {
$page .= $url['user'];
}
if ((isset($url['pass'])) && ($url['pass'])) {
$page .= ":".$url['pass'];
}
if ((isset($url['user']) && $url['user']) ||
(isset($url['pass']) && $url['pass'])) {
$page .="@";
}
$page .= $url['host'];
if ((isset($url['port'])) && ($url['port'])) {
$page .= ":" . $url['port'];
}
//$page.="/";
$page = trim($page, "/");
$page .= $_SERVER['REQUEST_URI'];
return $page;
}
/**
* Templating and visual functionality
*/
$CURRENT_SYSTEM_VIEWTYPE = "";
/**
* Override the view mode detection for the elgg view system.
*
* This function will force any further views to be rendered using $viewtype. Remember to call elgg_set_viewtype() with
* no parameters to reset.
*
* @param string $viewtype The view type, e.g. 'rss', or 'default'.
* @return bool
*/
function elgg_set_viewtype($viewtype = "") {
global $CURRENT_SYSTEM_VIEWTYPE;
$CURRENT_SYSTEM_VIEWTYPE = $viewtype;
return true;
}
/**
* Return the current view type used by the elgg view system.
*
* By default, this function will return a value based on the default for your system or from the command line
* view parameter. However, you may force a given view type by calling elgg_set_viewtype()
*
* @return string The view.
*/
function elgg_get_viewtype() {
global $CURRENT_SYSTEM_VIEWTYPE, $CONFIG;
$viewtype = NULL;
if ($CURRENT_SYSTEM_VIEWTYPE != "") {
return $CURRENT_SYSTEM_VIEWTYPE;
}
if ((empty($_SESSION['view'])) || ( (trim($CONFIG->view!="")) && ($_SESSION['view']!=$CONFIG->view) )) {
$_SESSION['view'] = "default";
// If we have a config default view for this site then use that instead of 'default'
if (/*(is_installed()) && */(!empty($CONFIG->view)) && (trim($CONFIG->view)!="")) {
$_SESSION['view'] = $CONFIG->view;
}
}
if (empty($viewtype) && is_callable('get_input')) {
$viewtype = get_input('view');
}
if (empty($viewtype)) {
$viewtype = $_SESSION['view'];
}
return $viewtype;
}
/**
* Return the location of a given view.
*
* @param string $view The view.
* @param string $viewtype The viewtype
*/
function elgg_get_view_location($view, $viewtype = '') {
global $CONFIG;
if (empty($viewtype)) {
$viewtype = elgg_get_viewtype();
}
if (!isset($CONFIG->views->locations[$viewtype][$view])) {
if (!isset($CONFIG->viewpath)) {
return dirname(dirname(dirname(__FILE__))) . "/views/";
} else {
return $CONFIG->viewpath;
}
} else {
return $CONFIG->views->locations[$viewtype][$view];
}
return false;
}
/**
* Handles templating views
*
* @see set_template_handler
*
* @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 boolean $bypass If set to true, elgg_view will bypass any specified alternative template handler; by default, it will hand off to this if requested (see set_template_handler)
* @param boolean $debug If set to true, the viewer will complain if it can't find a view
* @param string $viewtype If set, forces the viewtype for the elgg_view call to be this value (default: standard detection)
* @return string The HTML content
*/
function elgg_view($view, $vars = array(), $bypass = false, $debug = false, $viewtype = '') {
global $CONFIG;
static $usercache;
$view = (string)$view;
// basic checking for bad paths
if (strpos($view, '..') !== false) {
return false;
}
$view_orig = $view;
// Trigger the pagesetup event
if (!isset($CONFIG->pagesetupdone)) {
trigger_elgg_event('pagesetup','system');
$CONFIG->pagesetupdone = true;
}
if (!is_array($usercache)) {
$usercache = array();
}
if (!is_array($vars)) {
elgg_log('Vars in views must be an array!', 'ERROR');
$vars = array();
}
if (empty($vars)) {
$vars = array();
}
// Load session and configuration variables into $vars
// $_SESSION will always be an array if it is set
if (isset($_SESSION) /*&& is_array($_SESSION)*/ ) {
//= array_merge($vars, $_SESSION);
$vars += $_SESSION;
}
$vars['config'] = array();
if (!empty($CONFIG)) {
$vars['config'] = $CONFIG;
}
$vars['url'] = $CONFIG->url;
// Load page owner variables into $vars
if (is_callable('page_owner')) {
$vars['page_owner'] = page_owner();
} else {
$vars['page_owner'] = -1;
}
if (($vars['page_owner'] != -1) && (is_installed())) {
if (!isset($usercache[$vars['page_owner']])) {
$vars['page_owner_user'] = get_entity($vars['page_owner']);
$usercache[$vars['page_owner']] = $vars['page_owner_user'];
} else {
$vars['page_owner_user'] = $usercache[$vars['page_owner']];
}
}
if (!isset($vars['js'])) {
$vars['js'] = "";
}
// If it's been requested, pass off to a template handler instead
if ($bypass == false && isset($CONFIG->template_handler) && !empty($CONFIG->template_handler)) {
$template_handler = $CONFIG->template_handler;
if (is_callable($template_handler)) {
return $template_handler($view, $vars);
}
}
// Get the current viewtype
if (empty($viewtype)) {
$viewtype = elgg_get_viewtype();
}
// Viewtypes can only be alphanumeric
if (preg_match('[\W]', $viewtype)) {
return '';
}
// Set up any extensions to the requested view
if (isset($CONFIG->views->extensions[$view])) {
$viewlist = $CONFIG->views->extensions[$view];
} else {
$viewlist = array(500 => $view);
}
// Start the output buffer, find the requested view file, and execute it
ob_start();
foreach($viewlist as $priority => $view) {
$view_location = elgg_get_view_location($view, $viewtype);
$view_file = "$view_location$viewtype/$view.php";
$default_view_file = "{$view_location}default/$view.php";
// try to include view
if (!file_exists($view_file) || !include($view_file)) {
// requested view does not exist
$error = "$viewtype/$view view does not exist.";
// attempt to load default view
if ($viewtype != 'default') {
if (file_exists($default_view_file) && include($default_view_file)) {
// default view found
$error .= " Using default/$view instead.";
} else {
// no view found at all
$error = "Neither $viewtype/$view nor default/$view view exists.";
}
}
// log warning
elgg_log($error, 'NOTICE');
}
}
// Save the output buffer into the $content variable
$content = ob_get_clean();
// Plugin hook
$content = trigger_plugin_hook('view', $view_orig,
array('view' => $view_orig, 'vars' => $vars), $content);
// backward compatibility with less grandular hook will be gone in 2.0
$content_tmp = trigger_plugin_hook('display', 'view', array('view' => $view_orig, 'vars' => $vars), $content);
if ($content_tmp != $content) {
$content = $content_tmp;
elgg_deprecated_notice('The display:view plugin hook is deprecated by view:view_name or view:all', 1.8);
}
// Return $content
return $content;
}
/**
* Returns whether the specified view exists
*
* @param string $view The view name
* @param string $viewtype If set, forces the viewtype
* @param bool $recurse If false, do not recursively check extensions
* @return true|false Depending on success
*/
function elgg_view_exists($view, $viewtype = '', $recurse = true) {
global $CONFIG;
// Detect view type
if (empty($viewtype)) {
$viewtype = elgg_get_viewtype();
}
if (!isset($CONFIG->views->locations[$viewtype][$view])) {
if (!isset($CONFIG->viewpath)) {
$location = dirname(dirname(dirname(__FILE__))) . "/views/";
} else {
$location = $CONFIG->viewpath;
}
} else {
$location = $CONFIG->views->locations[$viewtype][$view];
}
if (file_exists($location . "{$viewtype}/{$view}.php")) {
return true;
}
// If we got here then check whether this exists as an extension
// We optionally recursively check whether the extended view exists also for the viewtype
if ($recurse && isset($CONFIG->views->extensions[$view])) {
foreach( $CONFIG->views->extensions[$view] as $view_extension ) {
// do not recursively check to stay away from infinite loops
if (elgg_view_exists($view_extension, $viewtype, false)) {
return true;
}
}
}
return false;
}
/**
* Registers a view to be simply cached
*
* Views cached in this manner must take no parameters and be login agnostic -
* that is to say, they look the same no matter who is logged in (or logged out).
*
* CSS and the basic jS views are automatically cached like this.
*
* @param string $viewname View name
*/
function elgg_view_register_simplecache($viewname) {
global $CONFIG;
if (!isset($CONFIG->views)) {
$CONFIG->views = new stdClass;
}
if (!isset($CONFIG->views->simplecache)) {
$CONFIG->views->simplecache = array();
}
//if (elgg_view_exists($viewname))
$CONFIG->views->simplecache[] = $viewname;
}
/**
* Regenerates the simple cache.
*
* @see elgg_view_register_simplecache
*
*/
function elgg_view_regenerate_simplecache() {
global $CONFIG;
// @todo elgg_view() checks if the page set is done (isset($CONFIG->pagesetupdone)) and
// triggers an event if it's not. Calling elgg_view() here breaks submenus
// (at least) because the page setup hook is called before any
// contexts can be correctly set (since this is called before page_handler()).
// To avoid this, lie about $CONFIG->pagehandlerdone to force
// the trigger correctly when the first view is actually being output.
$CONFIG->pagesetupdone = TRUE;
if (isset($CONFIG->views->simplecache)) {
if (!file_exists($CONFIG->dataroot . 'views_simplecache')) {
@mkdir($CONFIG->dataroot . 'views_simplecache');
}
if (!empty($CONFIG->views->simplecache) && is_array($CONFIG->views->simplecache)) {
foreach($CONFIG->views->simplecache as $view) {
$viewcontents = elgg_view($view);
$viewname = md5(elgg_get_viewtype() . $view);
if ($handle = fopen($CONFIG->dataroot . 'views_simplecache/' . $viewname, 'w')) {
fwrite($handle, $viewcontents);
fclose($handle);
}
}
}
datalist_set('simplecache_lastupdate', 0);
}
unset($CONFIG->pagesetupdone);
}
/**
* Enables the simple cache.
*
* @see elgg_view_register_simplecache
*
*/
function elgg_view_enable_simplecache() {
global $CONFIG;
if(!$CONFIG->simplecache_enabled) {
datalist_set('simplecache_enabled',1);
$CONFIG->simplecache_enabled = 1;
elgg_view_regenerate_simplecache();
}
}
/**
* Disables the simple cache.
*
* @see elgg_view_register_simplecache
*
*/
function elgg_view_disable_simplecache() {
global $CONFIG;
if ($CONFIG->simplecache_enabled) {
datalist_set('simplecache_enabled',0);
$CONFIG->simplecache_enabled = 0;
// purge simple cache
if ($handle = opendir($CONFIG->dataroot.'views_simplecache')) {
while (false !== ($file = readdir($handle))) {
if ($file != "." && $file != "..") {
unlink($CONFIG->dataroot.'views_simplecache/'.$file);
}
}
closedir($handle);
}
}
}
/**
* This is a factory function which produces an ElggCache object suitable for caching file load paths.
*
* TODO: Can this be done in a cleaner way?
* TODO: Swap to memcache etc?
*/
function elgg_get_filepath_cache() {
global $CONFIG;
static $FILE_PATH_CACHE;
if (!$FILE_PATH_CACHE) $FILE_PATH_CACHE = new ElggFileCache($CONFIG->dataroot);
return $FILE_PATH_CACHE;
}
/**
* Function which resets the file path cache.
*
*/
function elgg_filepath_cache_reset() {
$cache = elgg_get_filepath_cache();
return $cache->delete('view_paths');
}
/**
* Saves a filepath cache.
*
* @param mixed $data
*/
function elgg_filepath_cache_save($data) {
global $CONFIG;
if ($CONFIG->viewpath_cache_enabled) {
$cache = elgg_get_filepath_cache();
return $cache->save('view_paths', $data);
}
return false;
}
/**
* Retrieve the contents of the filepath cache.
*
*/
function elgg_filepath_cache_load() {
global $CONFIG;
if ($CONFIG->viewpath_cache_enabled) {
$cache = elgg_get_filepath_cache();
$cached_view_paths = $cache->load('view_paths');
if ($cached_view_paths) {
return $cached_view_paths;
}
}
return NULL;
}
/**
* Enable the filepath cache.
*
*/
function elgg_enable_filepath_cache() {
global $CONFIG;
datalist_set('viewpath_cache_enabled',1);
$CONFIG->viewpath_cache_enabled = 1;
elgg_filepath_cache_reset();
}
/**
* Disable filepath cache.
*
*/
function elgg_disable_filepath_cache() {
global $CONFIG;
datalist_set('viewpath_cache_enabled',0);
$CONFIG->viewpath_cache_enabled = 0;
elgg_filepath_cache_reset();
}
/**
* Internal function for retrieving views used by elgg_view_tree
*
* @param unknown_type $dir
* @param unknown_type $base
* @return unknown
*/
function elgg_get_views($dir, $base) {
$return = array();
if (file_exists($dir) && is_dir($dir)) {
if ($handle = opendir($dir)) {
while ($view = readdir($handle)) {
if (!in_array($view, array('.','..','.svn','CVS'))) {
if (is_dir($dir . '/' . $view)) {
if ($val = elgg_get_views($dir . '/' . $view, $base . '/' . $view)) {
$return = array_merge($return, $val);
}
} else {
$view = str_replace('.php','',$view);
$return[] = $base . '/' . $view;
}
}
}
}
}
return $return;
}
/**
* @deprecated 1.7. Use elgg_extend_view().
* @param $dir
* @param $base
*/
function get_views($dir, $base) {
elgg_deprecated_notice('get_views() was deprecated by elgg_get_views()!', 1.7);
elgg_get_views($dir, $base);
}
/**
* When given a partial view root (eg 'js' or 'page_elements'), returns an array of views underneath it
*
* @param string $view_root The root view
* @param string $viewtype Optionally specify a view type other than the current one.
* @return array A list of view names underneath that root view
*/
function elgg_view_tree($view_root, $viewtype = "") {
global $CONFIG;
static $treecache;
// Get viewtype
if (!$viewtype) {
$viewtype = elgg_get_viewtype();
}
// Has the treecache been initialised?
if (!isset($treecache)) {
$treecache = array();
}
// A little light internal caching
if (!empty($treecache[$view_root])) {
return $treecache[$view_root];
}
// Examine $CONFIG->views->locations
if (isset($CONFIG->views->locations[$viewtype])) {
foreach($CONFIG->views->locations[$viewtype] as $view => $path) {
$pos = strpos($view,$view_root);
if ($pos === 0) {
$treecache[$view_root][] = $view;
}
}
}
// Now examine core
$location = $CONFIG->viewpath;
$viewtype = elgg_get_viewtype();
$root = $location . $viewtype . '/' . $view_root;
if (file_exists($root) && is_dir($root)) {
$val = elgg_get_views($root, $view_root);
if (!is_array($treecache[$view_root])) {
$treecache[$view_root] = array();
}
$treecache[$view_root] = array_merge($treecache[$view_root], $val);
}
return $treecache[$view_root];
}
/**
* When given an entity, views it intelligently.
*
* Expects a view to exist called entity-type/subtype, or for the entity to have a parameter
* 'view' which lists a different view to display. In both cases, elgg_view will be called with
* array('entity' => $entity, 'full' => $full) as its parameters, and therefore this is what
* the view should expect to receive.
*
* @param ElggEntity $entity The entity to display
* @param boolean $full Determines whether or not to display the full version of an object, or a smaller version for use in aggregators etc
* @param boolean $bypass If set to true, elgg_view will bypass any specified alternative template handler; by default, it will hand off to this if requested (see set_template_handler)
* @param boolean $debug If set to true, the viewer will complain if it can't find a view
* @return string HTML to display or false
*/
function elgg_view_entity(ElggEntity $entity, $full = false, $bypass = true, $debug = false) {
global $autofeed;
$autofeed = true;
// No point continuing if entity is null
if (!$entity) {
return '';
}
if (!($entity instanceof ElggEntity)) {
return false;
}
// if this entity has a view defined, use it
$view = $entity->view;
if (is_string($view)) {
return elgg_view($view,
array('entity' => $entity, 'full' => $full),
$bypass,
$debug);
}
$entity_type = $entity->getType();
$subtype = $entity->getSubtype();
if (empty($subtype)) {
$subtype = $entity_type;
}
$contents = '';
if (elgg_view_exists("{$entity_type}/{$subtype}")) {
$contents = elgg_view("{$entity_type}/{$subtype}", array(
'entity' => $entity,
'full' => $full
), $bypass, $debug);
}
if (empty($contents)) {
$contents = elgg_view("{$entity_type}/default",array(
'entity' => $entity,
'full' => $full
), $bypass, $debug);
}
// Marcus Povey 20090616 : Speculative and low impact approach for fixing #964
if ($full) {
$annotations = elgg_view_entity_annotations($entity, $full);
if ($annotations) {
$contents .= $annotations;
}
}
return $contents;
}
/**
* When given an annotation, views it intelligently.
*
* This function expects annotation views to be of the form annotation/name, where name
* is the type of annotation.
*
* @param ElggAnnotation $annotation The annotation to display
* @param boolean $full Determines whether or not to display the full version of an object, or a smaller version for use in aggregators etc
* @param boolean $bypass If set to true, elgg_view will bypass any specified alternative template handler; by default, it will hand off to this if requested (see set_template_handler)
* @param boolean $debug If set to true, the viewer will complain if it can't find a view
* @return string HTML (etc) to display
*/
function elgg_view_annotation(ElggAnnotation $annotation, $bypass = true, $debug = false) {
global $autofeed;
$autofeed = true;
$view = $annotation->view;
if (is_string($view)) {
return elgg_view($view,array('annotation' => $annotation), $bypass, $debug);
}
$name = $annotation->name;
$intname = (int) $name;
if ("{$intname}" == "{$name}") {
$name = get_metastring($intname);
}
if (empty($name)) {
return "";
}
if (elgg_view_exists("annotation/{$name}")) {
return elgg_view("annotation/{$name}",array('annotation' => $annotation), $bypass, $debug);
} else {
return elgg_view("annotation/default",array('annotation' => $annotation), $bypass, $debug);
}
}
/**
* Returns a view of a list of entities, plus navigation. It is intended that this function
* be called from other wrapper functions.
*
* @see list_entities
* @see list_user_objects
* @see list_user_friends_objects
* @see list_entities_from_metadata
* @see list_entities_from_metadata_multi
* @see list_entities_from_relationships
* @see list_site_members
*
* @param array $entities List of entities
* @param int $count The total number of entities across all pages
* @param int $offset The current indexing offset
* @param int $limit The number of entities to display per page
* @param true|false $fullview Whether or not to display the full view (default: true)
* @param true|false $viewtypetoggle Whether or not to allow users to toggle to gallery view
* @param bool $pagination Whether pagination is offered.
* @return string The list of entities
*/
function elgg_view_entity_list($entities, $count, $offset, $limit, $fullview = true, $viewtypetoggle = true, $pagination = true) {
$count = (int) $count;
$limit = (int) $limit;
// do not require views to explicitly pass in the offset
if (!$offset = (int) $offset) {
$offset = sanitise_int(get_input('offset', 0));
}
// do not require views to explicitly pass in the offset
if (!$offset = (int) $offset) {
$offset = sanitise_int(get_input('offset', 0));
}
$context = get_context();
$html = elgg_view('entities/entity_list',array(
'entities' => $entities,
'count' => $count,
'offset' => $offset,
'limit' => $limit,
'baseurl' => $_SERVER['REQUEST_URI'],
'fullview' => $fullview,
'context' => $context,
'viewtypetoggle' => $viewtypetoggle,
'viewtype' => get_input('search_viewtype','list'),
'pagination' => $pagination
));
return $html;
}
/**
* Returns a view of a list of annotations, plus navigation. It is intended that this function
* be called from other wrapper functions.
*
* @param array $annotations List of annotations
* @param int $count The total number of annotations across all pages
* @param int $offset The current indexing offset
* @param int $limit The number of annotations to display per page
* @return string The list of annotations
*/
function elgg_view_annotation_list($annotations, $count, $offset, $limit) {
$count = (int) $count;
$offset = (int) $offset;
$limit = (int) $limit;
$html = "";
$nav = elgg_view('navigation/pagination',array(
'baseurl' => $_SERVER['REQUEST_URI'],
'offset' => $offset,
'count' => $count,
'limit' => $limit,
'word' => 'annoff',
'nonefound' => false,
));
$html .= $nav;
if (is_array($annotations) && sizeof($annotations) > 0) {
foreach($annotations as $annotation) {
$html .= elgg_view_annotation($annotation, "", false);
}
}
if ($count) {
$html .= $nav;
}
return $html;
}
/**
* Display a selective rendered list of annotations for a given entity.
*
* The list is produced as the result of the entity:annotate plugin hook
* and is designed to provide a more generic framework to allow plugins
* to extend the generic display of entities with their own annotation
* renderings.
*
* This is called automatically by the framework from elgg_view_entity()
*
* @param ElggEntity $entity
* @param bool $full
* @return string or false on failure
*/
function elgg_view_entity_annotations(ElggEntity $entity, $full = true) {
// No point continuing if entity is null
if (!$entity) {
return false;
}
if (!($entity instanceof ElggEntity)) {
return false;
}
$entity_type = $entity->getType();
$annotations = trigger_plugin_hook('entity:annotate', $entity_type,
array(
'entity' => $entity,
'full' => $full,
)
);
return $annotations;
}
/**
* Displays an internal layout for the use of a plugin canvas.
* Takes a variable number of parameters, which are made available
* in the views as $vars['area1'] .. $vars['areaN'].
*
* @param string $layout The name of the views in canvas/layouts/.
* @return string The layout
*/
function elgg_view_layout($layout) {
$arg = 1;
$param_array = array();
while ($arg < func_num_args()) {
$param_array['area' . $arg] = func_get_arg($arg);
$arg++;
}
if (elgg_view_exists("canvas/layouts/{$layout}")) {
return elgg_view("canvas/layouts/{$layout}",$param_array);
} else {
return elgg_view("canvas/default",$param_array);
}
}
/**
* Returns a view for the page title
*
* @param string $title The page title
* @param string $submenu Should a submenu be displayed? (default false, use not recommended)
* @return string The HTML (etc)
*/
function elgg_view_title($title, $submenu = false) {
$title = elgg_view('page_elements/title', array('title' => $title, 'submenu' => $submenu));
return $title;
}
/**
* Deprecated by elgg_add_submenu_item()
*
* @see elgg_add_submenu_item()
* @deprecated 1.8
*/
function add_submenu_item($label, $link, $group = 'default', $onclick = false, $selected = NULL) {
elgg_deprecated_notice('add_submenu_item was deprecated by elgg_add_submenu_item', 1.8);
$item = array(
'text' => $label,
'href' => $link,
'selected' => $selected
);
if (!$group) {
$group = 'default';
}
if ($onclick) {
$js = "onclick=\"javascript:return confirm('". elgg_echo('deleteconfirm') . "')\"";
$item['vars'] = array('js' => $js);
}
// submenu items were added in the page setup hook usually by checking
// the context. We'll pass in the current context here, which will
// emulate that effect.
// if context == 'main' (default) it probably means they always wanted
// the menu item to show up everywhere.
$context = get_context();
if ($context == 'main') {
$context = 'all';
}
return elgg_add_submenu_item($item, $context, $group);
}
/**
* Add an entry to the submenu.
*
* @param array $item The item as array(
* 'title' => 'Text to display',
* 'url' => 'URL of the link',
* 'id' => 'entry_unique_id' //used by children items to identify parents
* 'parent_id' => 'id_of_parent',
* 'selected' => BOOL // Is this item selected? (If NULL or unset will attempt to guess)
* 'vars' => array() // Array of vars to pass to the navigation/submenu_item view
* )
*
* @param string $context Context in which to display this menu item. 'all' will make it show up all the time. Use sparingly.
* @param string $group Group for the item. Each submenu group has its own
* @return BOOL
* @since 1.8
*/
function elgg_add_submenu_item(array $item, $context = 'all', $group = 'default') {
global $CONFIG;
if (!isset($CONFIG->submenu_items)) {
$CONFIG->submenu_items = array();
}
if (!isset($CONFIG->submenu_items[$context])) {
$CONFIG->submenu_items[$context] = array();
}
if (!isset($CONFIG->submenu_items[$context][$group])) {
$CONFIG->submenu_items[$context][$group] = array();
}
if (!isset($item['text'])) {
return FALSE;
}
// we use persistent object properties in the submenu
// setup function, so normalize the array to an object.
// we pass it in as an array because this would be the only
// place in elgg that we ask for an object like this.
// consistency ftw.
$item_obj = new StdClass();
foreach ($item as $k => $v) {
switch ($k) {
case 'parent_id':
case 'id':
// make sure '' and false make sense
$v = (empty($v)) ? NULL : $v;
default:
$item_obj->$k = $v;
break;
}
}
$CONFIG->submenu_items[$context][$group][] = $item_obj;
return TRUE;
}
/**
* Properly nest all submenu entries for contexts $context and 'all'
*
* @param string $context
* @param bool $sort Sort the menu items alphabetically
* @since 1.8
*/
function elgg_prepare_submenu($context = 'main', $sort = FALSE) {
global $CONFIG;
if (!isset($CONFIG->submenu_items) || !($CONFIG->submenu_items)) {
return FALSE;
}
$groups = array();
if (isset($CONFIG->submenu_items['all'])) {
$groups = $CONFIG->submenu_items['all'];
}
if (isset($CONFIG->submenu_items[$context])) {
$groups = array_merge_recursive($groups, $CONFIG->submenu_items[$context]);
}
if (!$groups) {
return FALSE;
}
foreach ($groups as $group => $items) {
if ($sort) {
usort($items, 'elgg_submenu_item_cmp');
}
$parsed_menu = array();
// determin which children need to go in this item.
foreach ($items as $i => $item) {
// can only support children if there's an id
if (isset($item->id)) {
foreach ($items as $child_i => $child_item) {
// don't check ourselves or used children.
if ($child_i == $i || $child_item->used == TRUE) {
continue;
}
if (isset($child_item->parent_id) && $child_item->parent_id == $item->id) {
if (!isset($item->children)) {
$item->children = array();
}
$item->children[] = $child_item;
$child_item->parent = $item;
// don't unset because we still need to check this item for children
$child_item->used = TRUE;
}
}
// if the parent doesn't have a url, make it the first child item.
if (isset($item->children) && $item->children && !$item->href) {
$child = $item->children[0];
while ($child && !isset($child->href)) {
if (isset($child->children) && isset($child->children[0])) {
$child = $child->children[0];
} else {
$child = NULL;
}
}
if ($child && isset($child->href)) {
$item->href = $child->href;
} else {
// @todo There are no URLs anywhere in this tree.
$item->href = $CONFIG->url;
}
}
}
// only add top-level elements to the menu.
// the rest are children.
if (!isset($item->parent_id)) {
$parsed_menu[] = $item;
}
}
$CONFIG->submenu[$context][$group] = $parsed_menu;
}
return TRUE;
}
/**
* Helper function used to sort submenu items by their display text.
*
* @param object $a
* @param object $b
* @since 1.8
*/
function elgg_submenu_item_cmp($a, $b) {
$a = $a->text;
$b = $b->text;
return strnatcmp($a, $b);
}
/**
* Use elgg_get_submenu().
*
* @see elgg_get_submenu()
* @deprecated 1.8
*/
function get_submenu() {
elgg_deprecated_notice("get_submenu() has been deprecated by elgg_get_submenu()", 1.8);
return elgg_get_submenu();
}
/**
* Return the HTML for a sidemenu.
*
* @param string $context The context of the submenu (defaults to main)
* @param BOOL $sort Sort by display name?
* @return string Formatted HTML.
* @since 1.8
*/
function elgg_get_submenu($context = NULL, $sort = FALSE) {
global $CONFIG;
if (!$context) {
$context = get_context();
}
if (!elgg_prepare_submenu($context, $sort)) {
return '';
}
$groups = $CONFIG->submenu[$context];
$submenu_html = '';
foreach ($groups as $group => $items) {
// how far down we are in children arrays
$depth = 0;
// push and pop parent items
$temp_items = array();
while ($item = current($items)) {
$t = '';
// ignore parents created by a child but parent never defined properly
if (!isset($item->text) || !($item->text)) {
next($items);
continue;
}
// try to guess if this should be selected if they don't specify
if ((!isset($item->selected) || $item->selected === NULL) && isset($item->href)) {
$item->selected = elgg_http_url_is_identical($_SERVER['REQUEST_URI'], $item->href);
}
// traverse up the parent tree if matached to mark all parents as selected/expanded.
if ($item->selected && isset($item->parent)) {
$parent = $item->parent;
while ($parent) {
$parent->selected = TRUE;
if (isset($parent->parent)) {
$parent = $parent->parent;
} else {
$parent = NULL;
}
}
}
// get the next item
if (isset($item->children) && $item->children) {
$depth++;
array_push($temp_items, $items);
$items = $item->children;
} elseif ($depth > 0) {
// check if there are more children elements in the current items
// pop back up to the parent(s) if not
if ($item = next($items)) {
continue;
} else {
while($depth > 0) {
$depth--;
$items = array_pop($temp_items);
if ($item = next($items)) {
break;
}
}
}
} else {
next($items);
}
}
$submenu_html .= elgg_view('navigation/submenu_group', array('group' => $group, 'items' => $items));
}
// include the JS for the expand menus too
return elgg_view('navigation/submenu_js') . $submenu_html;
}
/**
* Automatically views likes and a like input relating to the given entity
*
* @param ElggEntity $entity The entity to like
* @return string|false The HTML (etc) for the likes, or false on failure
* @since 1.8
*/
function elgg_view_likes($entity){
if (!($entity instanceof ElggEntity)) {
return false;
}
if ($likes = trigger_plugin_hook('likes', $entity->getType(), array('entity' => $entity), false)) {
return $likes;
} else {
//display the form
$likes = elgg_view('likes/forms/edit', array('entity' => $entity));
return $likes;
}
}
/**
* Count the number of likes attached to an entity
*
* @param ElggEntity $entity
* @return int Number of likes
* @since 1.8
*/
function elgg_count_likes($entity) {
if ($likeno = trigger_plugin_hook('likes:count', $entity->getType(),
array('entity' => $entity), false)) {
return $likeno;
} else {
return count_annotations($entity->getGUID(), "", "", "likes");
}
}
/**
* Automatically views comments and a comment form relating to the given entity
*
* @param ElggEntity $entity The entity to comment on
* @return string|false The HTML (etc) for the comments, or false on failure
*/
function elgg_view_comments($entity){
if (!($entity instanceof ElggEntity)) {
return false;
}
if ($comments = trigger_plugin_hook('comments',$entity->getType(),array('entity' => $entity),false)) {
return $comments;
} else {
$comments = list_annotations($entity->getGUID(),'generic_comment');
//display the comment form
$comments .= elgg_view('comments/forms/edit',array('entity' => $entity));
return $comments;
}
}
/**
* Count the number of comments attached to an entity
*
* @param ElggEntity $entity
* @return int Number of comments
*/
function elgg_count_comments($entity) {
if ($commentno = trigger_plugin_hook('comments:count', $entity->getType(),
array('entity' => $entity), false)) {
return $commentno;
} else {
return count_annotations($entity->getGUID(), "", "", "generic_comment");
}
}
/**
* Wrapper function to display search listings.
*
* @param string $icon The icon for the listing
* @param string $info Any information that needs to be displayed.
* @return string The HTML (etc) representing the listing
*/
function elgg_view_listing($icon, $info) {
return elgg_view('entities/entity_listing',array('icon' => $icon, 'info' => $info));
}
/**
* Sets an alternative function to handle templates, which will be passed to by elgg_view.
* This function must take the $view and $vars parameters from elgg_view:
*
* function my_template_function(string $view, array $vars = array())
*
* @see elgg_view
*
* @param string $function_name The name of the function to pass to.
* @return true|false
*/
function set_template_handler($function_name) {
global $CONFIG;
if (!empty($function_name) && is_callable($function_name)) {
$CONFIG->template_handler = $function_name;
return true;
}
return false;
}
/**
* Extends a view by adding other views to be displayed at the same time.
*
* @param string $view The view to add to.
* @param string $view_name The name of the view to extend
* @param int $priority The priority, from 0 to 1000, to add at (lowest numbers will be displayed first)
* @param string $viewtype Not used
*/
function elgg_extend_view($view, $view_name, $priority = 501, $viewtype = '') {
global $CONFIG;
if (!isset($CONFIG->views)) {
$CONFIG->views = new stdClass;
}
if (!isset($CONFIG->views->extensions)) {
$CONFIG->views->extensions = array();
}
if (!isset($CONFIG->views->extensions[$view])) {
$CONFIG->views->extensions[$view][500] = "{$view}";
}
while(isset($CONFIG->views->extensions[$view][$priority])) {
$priority++;
}
$CONFIG->views->extensions[$view][$priority] = "{$view_name}";
ksort($CONFIG->views->extensions[$view]);
}
/**
* @deprecated 1.7. Use elgg_extend_view().
* @param $view
* @param $view_name
* @param $priority
* @param $viewtype
*/
function extend_view($view, $view_name, $priority = 501, $viewtype = '') {
elgg_deprecated_notice('extend_view() was deprecated by elgg_extend_view()!', 1.7);
elgg_extend_view($view, $view_name, $priority, $viewtype);
}
/**
* Set an alternative base location for a view (as opposed to the default of $CONFIG->viewpath)
*
* @param string $view The name of the view
* @param string $location The base location path
*/
function set_view_location($view, $location, $viewtype = '') {
global $CONFIG;
if (empty($viewtype)) {
$viewtype = 'default';
}
if (!isset($CONFIG->views)) {
$CONFIG->views = new stdClass;
}
if (!isset($CONFIG->views->locations)) {
$CONFIG->views->locations = array($viewtype => array($view => $location));
} else if (!isset($CONFIG->views->locations[$viewtype])) {
$CONFIG->views->locations[$viewtype] = array($view => $location);
} else {
$CONFIG->views->locations[$viewtype][$view] = $location;
}
}
/**
* Auto-registers views from a particular starting location
*
* @param string $view_base The base of the view name
* @param string $folder The folder to begin looking in
* @param string $base_location_path The base views directory to use with set_view_location
* @param string $viewtype The type of view we're looking at (default, rss, etc)
*/
function autoregister_views($view_base, $folder, $base_location_path, $viewtype) {
if (!isset($i)) {
$i = 0;
}
if ($handle = opendir($folder)) {
while ($view = readdir($handle)) {
if (!in_array($view,array('.','..','.svn','CVS')) && !is_dir($folder . "/" . $view)) {
if ((substr_count($view,".php") > 0) || (substr_count($view,".png") > 0)) {
if (!empty($view_base)) {
$view_base_new = $view_base . "/";
} else {
$view_base_new = "";
}
set_view_location($view_base_new . str_replace(".php","",$view), $base_location_path, $viewtype);
}
} else if (!in_array($view,array('.','..','.svn','CVS')) && is_dir($folder . "/" . $view)) {
if (!empty($view_base)) {
$view_base_new = $view_base . "/";
} else {
$view_base_new = "";
}
autoregister_views($view_base_new . $view, $folder . "/" . $view, $base_location_path, $viewtype);
}
}
}
}
/**
* Returns a representation of a full 'page' (which might be an HTML page, RSS file, etc, depending on the current view)
*
* @param unknown_type $title
* @param unknown_type $body
* @return unknown
*/
function page_draw($title, $body, $sidebar = "") {
// get messages - try for errors first
$sysmessages = system_messages(null, "errors");
if (count($sysmessages["errors"]) == 0) {
// no errors so grab rest of messages
$sysmessages = system_messages(null, "");
} else {
// we have errors - clear out remaining messages
system_messages(null, "");
}
// Draw the page
$output = elgg_view('page_shells/default', array(
'title' => $title,
'body' => $body,
'sidebar' => $sidebar,
'sysmessages' => $sysmessages,
)
);
$split_output = str_split($output, 1024);
foreach($split_output as $chunk) {
echo $chunk;
}
}
/**
* Displays a UNIX timestamp in a friendly way (eg "less than a minute ago")
*
* @param int $time A UNIX epoch timestamp
* @return string The friendly time
*/
function friendly_time($time) {
return elgg_view('output/friendlytime', array('time' => $time));
}
/**
* When given a title, returns a version suitable for inclusion in a URL
*
* @param string $title The title
* @return string The optimised title
*/
function friendly_title($title) {
return elgg_view('output/friendlytitle', array('title' => $title));
}
/**
* Library loading and handling
*/
/**
* @deprecated 1.7
*/
function get_library_files($directory, $exceptions = array(), $list = array()) {
elgg_deprecated_notice('get_library_files() deprecated by elgg_get_file_list()', 1.7);
return elgg_get_file_list($directory, $exceptions, $list, array('.php'));
}
/**
* Returns a list of files in $directory
*
* @param str $directory
* @param array $exceptions Array of filenames to ignore
* @param array $list Array of files to append to
* @param mixed $extensions Array of extensions to allow, NULL for all. (With a dot: array('.php'))
* @return array
*/
function elgg_get_file_list($directory, $exceptions = array(), $list = array(), $extensions = NULL) {
if ($handle = opendir($directory)) {
while (($file = readdir($handle)) !== FALSE) {
if (!is_file($file) || in_array($file, $exceptions)) {
continue;
}
if (is_array($extensions)) {
if (in_array(strrchr($file, '.'), $extensions)) {
$list[] = $directory . "/" . $file;
}
} else {
$list[] = $directory . "/" . $file;
}
}
}
return $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")) {
// See if we are being asked to save the file
$save_vars = get_input('db_install_vars');
$result = "";
if ($save_vars) {
$rtn = db_check_settings($save_vars['CONFIG_DBUSER'],
$save_vars['CONFIG_DBPASS'],
$save_vars['CONFIG_DBNAME'],
$save_vars['CONFIG_DBHOST'] );
if ($rtn == FALSE) {
register_error(elgg_view("messages/sanitisation/dbsettings_error"));
register_error(elgg_view("messages/sanitisation/settings",
array( 'settings.php' => $result,
'sticky' => $save_vars)));
return FALSE;
}
$result = create_settings($save_vars, dirname(dirname(__FILE__)) . "/settings.example.php");
if (file_put_contents(dirname(dirname(__FILE__)) . "/settings.php", $result)) {
// blank result to stop it being displayed in textarea
$result = "";
}
}
// Recheck to see if the file is still missing
if (!file_exists(dirname(dirname(__FILE__)) . "/settings.php")) {
register_error(elgg_view("messages/sanitisation/settings", array('settings.php' => $result)));
$sanitised = false;
}
}
if (!file_exists(dirname(dirname(dirname(__FILE__))) . "/.htaccess")) {
if (!@copy(dirname(dirname(dirname(__FILE__))) . "/htaccess_dist", dirname(dirname(dirname(__FILE__))) . "/.htaccess")) {
register_error(elgg_view("messages/sanitisation/htaccess", array('.htaccess' => file_get_contents(dirname(dirname(dirname(__FILE__))) . "/htaccess_dist"))));
$sanitised = false;
}
}
return $sanitised;
}
/**
* Registers
*/
/**
* Adds an array with a name to a given generic array register.
* For example, these are used for menus.
*
* @param string $register_name The name of the top-level register
* @param string $subregister_name The name of the subregister
* @param mixed $subregister_value The value of the subregister
* @param array $children_array Optionally, an array of children
* @return true|false Depending on success
*/
function add_to_register($register_name, $subregister_name, $subregister_value, $children_array = array()) {
global $CONFIG;
if (empty($register_name) || empty($subregister_name)) {
return false;
}
if (!isset($CONFIG->registers)) {
$CONFIG->registers = array();
}
if (!isset($CONFIG->registers[$register_name])) {
$CONFIG->registers[$register_name] = array();
}
$subregister = new stdClass;
$subregister->name = $subregister_name;
$subregister->value = $subregister_value;
if (is_array($children_array)) {
$subregister->children = $children_array;
}
$CONFIG->registers[$register_name][$subregister_name] = $subregister;
return true;
}
/**
* Returns a register object
*
* @param string $register_name The name of the register
* @param mixed $register_value The value of the register
* @param array $children_array Optionally, an array of children
* @return false|stdClass Depending on success
*/
function make_register_object($register_name, $register_value, $children_array = array()) {
elgg_deprecated_notice('make_register_object() is deprecated by add_submenu_item()', 1.7);
if (empty($register_name) || empty($register_value)) {
return false;
}
$register = new stdClass;
$register->name = $register_name;
$register->value = $register_value;
$register->children = $children_array;
return $register;
}
/**
* If it exists, returns a particular register as an array
*
* @param string $register_name The name of the register
* @return array|false Depending on success
*/
function get_register($register_name) {
global $CONFIG;
if (isset($CONFIG->registers[$register_name])) {
return $CONFIG->registers[$register_name];
}
return false;
}
/**
* Adds an item to the menu register
* This is used in the core to create the tools dropdown menu
* You can obtain the menu array by calling get_register('menu')
*
* @param string $menu_name The name of the menu item
* @param string $menu_url The URL of the page
* @param array $menu_children Optionally, an array of submenu items (not currently used)
* @param string $context
* @return true|false Depending on success
*/
function add_menu($menu_name, $menu_url, $menu_children = array(), $context = "") {
global $CONFIG;
if (!isset($CONFIG->menucontexts)) {
$CONFIG->menucontexts = array();
}
if (empty($context)) {
$context = get_plugin_name();
}
$value = new stdClass();
$value->url = $menu_url;
$value->context = $context;
$CONFIG->menucontexts[] = $context;
return add_to_register('menu', $menu_name, $value, $menu_children);
}
/**
* Returns a menu item for use in the children section of add_menu()
* This is not currently used in the Elgg core
*
* @param string $menu_name The name of the menu item
* @param string $menu_url Its URL
* @return stdClass|false Depending on success
*/
function menu_item($menu_name, $menu_url) {
elgg_deprecated_notice('menu_item() is deprecated by add_submenu_item', 1.7);
return make_register_object($menu_name, $menu_url);
}
/**
* Message register handling
* If a null $message parameter is given, the function returns the array of messages so far and empties it
* based on the $register parameters. Otherwise, any message or array of messages is added.
*
* @param string|array $message Optionally, a single message or array of messages to add, (default: null)
* @param string $register This allows for different types of messages: "errors", "messages" (default: messages)
* @param bool $count Count the number of messages (default: false)
* @return true|false|array Either the array of messages, or a response regarding whether the message addition was successful
*/
function system_messages($message = null, $register = "messages", $count = false) {
if (!isset($_SESSION['msg'])) {
$_SESSION['msg'] = array();
}
if (!isset($_SESSION['msg'][$register]) && !empty($register)) {
$_SESSION['msg'][$register] = array();
}
if (!$count) {
if (!empty($message) && is_array($message)) {
$_SESSION['msg'][$register] = array_merge($_SESSION['msg'][$register], $message);
return true;
} else if (!empty($message) && is_string($message)) {
$_SESSION['msg'][$register][] = $message;
return true;
} else if (is_null($message)) {
if ($register != "") {
$returnarray = array();
$returnarray[$register] = $_SESSION['msg'][$register];
$_SESSION['msg'][$register] = array();
} else {
$returnarray = $_SESSION['msg'];
$_SESSION['msg'] = array();
}
return $returnarray;
}
} else {
if (!empty($register)) {
return sizeof($_SESSION['msg'][$register]);
} else {
$count = 0;
foreach($_SESSION['msg'] as $register => $submessages) {
$count += sizeof($submessages);
}
return $count;
}
}
return false;
}
/**
* 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,$register,true);
}
/**
* An alias for system_messages($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($error, "errors");
}
/**
* Event register
* Adds functions to the register for a particular event, but also calls all functions registered to an event when required
*
* Event handler functions must be of the form:
*
* event_handler_function($event, $object_type, $object);
*
* And must return true or false depending on success. A false will halt the event in its tracks and no more functions will be called.
*
* You can then simply register them using the following function. Optionally, this can be called with a priority nominally from 0 to 1000, where functions with lower priority values are called first (note that priorities CANNOT be negative):
*
* register_elgg_event_handler($event, $object_type, $function_name [, $priority = 500]);
*
* Note that you can also use 'all' in place of both the event and object type.
*
* To trigger an event properly, you should always use:
*
* trigger_elgg_event($event, $object_type [, $object]);
*
* Where $object is optional, and represents the $object_type the event concerns. This will return true if successful, or false if it fails.
*
* @param string $event The type of event (eg 'init', 'update', 'delete')
* @param string $object_type The type of object (eg 'system', 'blog', 'user')
* @param string $function The name of the function that will handle the event
* @param int $priority A priority to add new event handlers at. Lower numbers will be called first (default 500)
* @param boolean $call Set to true to call the event rather than add to it (default false)
* @param mixed $object Optionally, the object the event is being performed on (eg a user)
* @return true|false Depending on success
*/
function events($event = "", $object_type = "", $function = "", $priority = 500, $call = false, $object = null) {
global $CONFIG;
if (!isset($CONFIG->events)) {
$CONFIG->events = array();
} else if (!isset($CONFIG->events[$event]) && !empty($event)) {
$CONFIG->events[$event] = array();
} else if (!isset($CONFIG->events[$event][$object_type]) && !empty($event) && !empty($object_type)) {
$CONFIG->events[$event][$object_type] = array();
}
if (!$call) {
if (!empty($event) && !empty($object_type) && is_callable($function)) {
$priority = (int) $priority;
if ($priority < 0) {
$priority = 0;
}
while (isset($CONFIG->events[$event][$object_type][$priority])) {
$priority++;
}
$CONFIG->events[$event][$object_type][$priority] = $function;
ksort($CONFIG->events[$event][$object_type]);
return true;
} else {
return false;
}
} else {
$return = true;
if (!empty($CONFIG->events[$event][$object_type]) && is_array($CONFIG->events[$event][$object_type])) {
foreach($CONFIG->events[$event][$object_type] as $eventfunction) {
if ($eventfunction($event, $object_type, $object) === false) {
return false;
}
}
}
if (!empty($CONFIG->events['all'][$object_type]) && is_array($CONFIG->events['all'][$object_type])) {
foreach($CONFIG->events['all'][$object_type] as $eventfunction) {
if ($eventfunction($event, $object_type, $object) === false) {
return false;
}
}
}
if (!empty($CONFIG->events[$event]['all']) && is_array($CONFIG->events[$event]['all'])) {
foreach($CONFIG->events[$event]['all'] as $eventfunction) {
if ($eventfunction($event, $object_type, $object) === false) {
return false;
}
}
}
if (!empty($CONFIG->events['all']['all']) && is_array($CONFIG->events['all']['all'])) {
foreach($CONFIG->events['all']['all'] as $eventfunction) {
if ($eventfunction($event, $object_type, $object) === false) {
return false;
}
}
}
return $return;
}
return false;
}
/**
* Alias function for events, that registers a function to a particular kind of event
*
* @param string $event The event type
* @param string $object_type The object type
* @param string $function The function name
* @return true|false Depending on success
*/
function register_elgg_event_handler($event, $object_type, $function, $priority = 500) {
return events($event, $object_type, $function, $priority);
}
/**
* Unregisters a function to a particular kind of event
*
* @param string $event The event type
* @param string $object_type The object type
* @param string $function The function name
*/
function unregister_elgg_event_handler($event, $object_type, $function) {
global $CONFIG;
foreach($CONFIG->events[$event][$object_type] as $key => $event_function) {
if ($event_function == $function) {
unset($CONFIG->events[$event][$object_type][$key]);
}
}
}
/**
* Alias function for events, that triggers a particular kind of event
*
* @param string $event The event type
* @param string $object_type The object type
* @param string $function The function name
* @return true|false Depending on success
*/
function trigger_elgg_event($event, $object_type, $object = null) {
$return = true;
$return1 = events($event, $object_type, "", null, true, $object);
if (!is_null($return1)) {
$return = $return1;
}
return $return;
}
/**
* Register a function to a plugin hook for a particular entity type, with a given priority.
*
* eg if you want the function "export_user" to be called when the hook "export" for "user" entities
* is run, use:
*
* register_plugin_hook("export", "user", "export_user");
*
* "all" is a valid value for both $hook and $entity_type. "none" is a valid value for $entity_type.
*
* The export_user function would then be defined as:
*
* function export_user($hook, $entity_type, $returnvalue, $params);
*
* Where $returnvalue is the return value returned by the last function returned by the hook, and
* $params is an array containing a set of parameters (or nothing).
*
* @param string $hook The name of the hook
* @param string $entity_type The name of the type of entity (eg "user", "object" etc)
* @param string $function The name of a valid function to be run
* @param string $priority The priority - 0 is first, 1000 last, default is 500
* @return true|false Depending on success
*/
function register_plugin_hook($hook, $entity_type, $function, $priority = 500) {
global $CONFIG;
if (!isset($CONFIG->hooks)) {
$CONFIG->hooks = array();
} else if (!isset($CONFIG->hooks[$hook]) && !empty($hook)) {
$CONFIG->hooks[$hook] = array();
} else if (!isset($CONFIG->hooks[$hook][$entity_type]) && !empty($entity_type)) {
$CONFIG->hooks[$hook][$entity_type] = array();
}
if (!empty($hook) && !empty($entity_type) && is_callable($function)) {
$priority = (int) $priority;
if ($priority < 0) {
$priority = 0;
}
while (isset($CONFIG->hooks[$hook][$entity_type][$priority])) {
$priority++;
}
$CONFIG->hooks[$hook][$entity_type][$priority] = $function;
ksort($CONFIG->hooks[$hook][$entity_type]);
return true;
} else {
return false;
}
}
/**
* Unregister a function to a plugin hook for a particular entity type
*
* @param string $hook The name of the hook
* @param string $entity_type The name of the type of entity (eg "user", "object" etc)
* @param string $function The name of a valid function to be run
*/
function unregister_plugin_hook($hook, $entity_type, $function) {
global $CONFIG;
foreach($CONFIG->hooks[$hook][$entity_type] as $key => $hook_function) {
if ($hook_function == $function) {
unset($CONFIG->hooks[$hook][$entity_type][$key]);
}
}
}
/**
* Triggers a plugin hook, with various parameters as an array. For example, to provide
* a 'foo' hook that concerns an entity of type 'bar', with a parameter called 'param1'
* with value 'value1', that by default returns true, you'd call:
*
* trigger_plugin_hook('foo', 'bar', array('param1' => 'value1'), true);
*
* @see register_plugin_hook
* @param string $hook The name of the hook to trigger
* @param string $entity_type The name of the entity type to trigger it for (or "all", or "none")
* @param array $params Any parameters. It's good practice to name the keys, i.e. by using array('name' => 'value', 'name2' => 'value2')
* @param mixed $returnvalue An initial return value
* @return mixed|null The cumulative return value for the plugin hook functions
*/
function trigger_plugin_hook($hook, $entity_type, $params = null, $returnvalue = null) {
global $CONFIG;
//if (!isset($CONFIG->hooks) || !isset($CONFIG->hooks[$hook]) || !isset($CONFIG->hooks[$hook][$entity_type]))
// return $returnvalue;
if (!empty($CONFIG->hooks[$hook][$entity_type]) && is_array($CONFIG->hooks[$hook][$entity_type])) {
foreach($CONFIG->hooks[$hook][$entity_type] as $hookfunction) {
$temp_return_value = $hookfunction($hook, $entity_type, $returnvalue, $params);
if (!is_null($temp_return_value)) {
$returnvalue = $temp_return_value;
}
}
}
//else
//if (!isset($CONFIG->hooks['all'][$entity_type]))
// return $returnvalue;
if (!empty($CONFIG->hooks['all'][$entity_type]) && is_array($CONFIG->hooks['all'][$entity_type])) {
foreach($CONFIG->hooks['all'][$entity_type] as $hookfunction) {
$temp_return_value = $hookfunction($hook, $entity_type, $returnvalue, $params);
if (!is_null($temp_return_value)) $returnvalue = $temp_return_value;
}
}
//else
//if (!isset($CONFIG->hooks[$hook]['all']))
// return $returnvalue;
if (!empty($CONFIG->hooks[$hook]['all']) && is_array($CONFIG->hooks[$hook]['all'])) {
foreach($CONFIG->hooks[$hook]['all'] as $hookfunction) {
$temp_return_value = $hookfunction($hook, $entity_type, $returnvalue, $params);
if (!is_null($temp_return_value)) {
$returnvalue = $temp_return_value;
}
}
}
//else
//if (!isset($CONFIG->hooks['all']['all']))
// return $returnvalue;
if (!empty($CONFIG->hooks['all']['all']) && is_array($CONFIG->hooks['all']['all'])) {
foreach($CONFIG->hooks['all']['all'] as $hookfunction) {
$temp_return_value = $hookfunction($hook, $entity_type, $returnvalue, $params);
if (!is_null($temp_return_value)) {
$returnvalue = $temp_return_value;
}
}
}
return $returnvalue;
}
/**
* Error handling
*/
/**
* PHP Error handler function.
* This function acts as a wrapper to catch and report PHP error messages.
*
* @see http://www.php.net/set-error-handler
* @param int $errno The level of the error raised
* @param string $errmsg The error message
* @param string $filename The filename the error was raised in
* @param int $linenum The line number the error was raised at
* @param array $vars An array that points to the active symbol table at the point that the error occurred
*/
function __elgg_php_error_handler($errno, $errmsg, $filename, $linenum, $vars) {
$error = date("Y-m-d H:i:s (T)") . ": \"$errmsg\" in file $filename (line $linenum)";
switch ($errno) {
case E_USER_ERROR:
error_log("ERROR: $error");
register_error("ERROR: $error");
// Since this is a fatal error, we want to stop any further execution but do so gracefully.
throw new Exception($error);
break;
case E_WARNING :
case E_USER_WARNING :
error_log("WARNING: $error");
break;
default:
global $CONFIG;
if (isset($CONFIG->debug) && $CONFIG->debug === 'NOTICE') {
error_log("NOTICE: $error");
}
}
return true;
}
/**
* Throws a message to the Elgg logger
*
* The Elgg log is currently implemented such that any messages sent at a level
* greater than or equal to the debug setting will be sent to elgg_dump.
* The default location for elgg_dump is the screen except for notices.
*
* Note: No messages will be displayed unless debugging has been enabled.
*
* @param str $message User message
* @param str $level NOTICE | WARNING | ERROR | DEBUG
* @return bool
*/
function elgg_log($message, $level='NOTICE') {
global $CONFIG;
// only log when debugging is enabled
if (isset($CONFIG->debug)) {
// debug to screen or log?
$to_screen = !($CONFIG->debug == 'NOTICE');
switch ($level) {
case 'ERROR':
// always report
elgg_dump("$level: $message", $to_screen, $level);
break;
case 'WARNING':
case 'DEBUG':
// report except if user wants only errors
if ($CONFIG->debug != 'ERROR') {
elgg_dump("$level: $message", $to_screen, $level);
}
break;
case 'NOTICE':
default:
// only report when lowest level is desired
if ($CONFIG->debug == 'NOTICE') {
elgg_dump("$level: $message", FALSE, $level);
}
break;
}
return TRUE;
}
return FALSE;
}
/**
* Extremely generic var_dump-esque wrapper
*
* Immediately dumps the given $value as a human-readable string.
* The $value can instead be written to the screen or server log depending on
* the value of the $to_screen flag.
*
* @param mixed $value
* @param bool $to_screen
* @param string $level
* @return void
*/
function elgg_dump($value, $to_screen = TRUE, $level = 'NOTICE') {
global $CONFIG;
// plugin can return false to stop the default logging method
$params = array('level' => $level,
'msg' => $value,
'to_screen' => $to_screen);
if (!trigger_plugin_hook('debug', 'log', $params, true)) {
return;
}
// Do not want to write to screen before page creation has started.
// This is not fool-proof but probably fixes 95% of the cases when logging
// results in data sent to the browser before the page is begun.
if (!isset($CONFIG->pagesetupdone)) {
$to_screen = FALSE;
}
if ($to_screen == TRUE) {
echo '
';
print_r($value);
echo '
';
} else {
error_log(print_r($value, TRUE));
}
}
/**
* Custom exception handler.
* This function catches any thrown exceptions and handles them appropriately.
*
* @see http://www.php.net/set-exception-handler
* @param Exception $exception The exception being handled
*/
function __elgg_php_exception_handler($exception) {
error_log("*** FATAL EXCEPTION *** : " . $exception);
ob_end_clean(); // Wipe any existing output buffer
// make sure the error isn't cached
header("Cache-Control: no-cache, must-revalidate", true);
header('Expires: Fri, 05 Feb 1982 00:00:00 -0500', true);
//header("Internal Server Error", true, 500);
$body = elgg_view("messages/exceptions/exception",array('object' => $exception));
page_draw(elgg_echo('exception:title'), $body);
}
/**
* Data lists
*/
$DATALIST_CACHE = array();
/**
* Get the value of a particular piece of data in the datalist
*
* @param string $name The name of the datalist
* @return string|false Depending on success
*/
function datalist_get($name) {
global $CONFIG, $DATALIST_CACHE;
// We need this, because sometimes datalists are received before the database is created
if (!is_db_installed()) {
return false;
}
$name = sanitise_string($name);
if (isset($DATALIST_CACHE[$name])) {
return $DATALIST_CACHE[$name];
}
// If memcache enabled then cache value in memcache
$value = null;
static $datalist_memcache;
if ((!$datalist_memcache) && (is_memcache_available())) {
$datalist_memcache = new ElggMemcache('datalist_memcache');
}
if ($datalist_memcache) {
$value = $datalist_memcache->load($name);
}
if ($value) {
return $value;
}
// [Marcus Povey 20090217 : Now retrieving all datalist values on first load as this saves about 9 queries per page]
$result = get_data("SELECT * from {$CONFIG->dbprefix}datalists");
if ($result) {
foreach ($result as $row) {
$DATALIST_CACHE[$row->name] = $row->value;
// Cache it if memcache is available
if ($datalist_memcache) {
$datalist_memcache->save($row->name, $row->value);
}
}
if (isset($DATALIST_CACHE[$name])) {
return $DATALIST_CACHE[$name];
}
}
/*if ($row = get_data_row("SELECT value from {$CONFIG->dbprefix}datalists where name = '{$name}' limit 1")) {
$DATALIST_CACHE[$name] = $row->value;
// Cache it if memcache is available
if ($datalist_memcache) $datalist_memcache->save($name, $row->value);
return $row->value;
}*/
return false;
}
/**
* Sets the value for a system-wide piece of data (overwriting a previous value if it exists)
*
* @param string $name The name of the datalist
* @param string $value The new value
* @return true
*/
function datalist_set($name, $value) {
global $CONFIG, $DATALIST_CACHE;
$name = sanitise_string($name);
$value = sanitise_string($value);
// If memcache is available then invalidate the cached copy
static $datalist_memcache;
if ((!$datalist_memcache) && (is_memcache_available())) {
$datalist_memcache = new ElggMemcache('datalist_memcache');
}
if ($datalist_memcache) {
$datalist_memcache->delete($name);
}
//delete_data("delete from {$CONFIG->dbprefix}datalists where name = '{$name}'");
insert_data("INSERT into {$CONFIG->dbprefix}datalists set name = '{$name}', value = '{$value}' ON DUPLICATE KEY UPDATE value='{$value}'");
$DATALIST_CACHE[$name] = $value;
return true;
}
/**
* Runs a function once - not per page load, but per installation.
* If you like, you can also set the threshold for the function execution - i.e.,
* if the function was executed before or on $timelastupdatedcheck, this
* function will run it again.
*
* @param string $functionname The name of the function you want to run.
* @param int $timelastupdatedcheck Optionally, the UNIX epoch timestamp of the execution threshold
* @return true|false Depending on success.
*/
function run_function_once($functionname, $timelastupdatedcheck = 0) {
if ($lastupdated = datalist_get($functionname)) {
$lastupdated = (int) $lastupdated;
} else {
$lastupdated = 0;
}
if (is_callable($functionname) && $lastupdated <= $timelastupdatedcheck) {
$functionname();
datalist_set($functionname,time());
return true;
} else {
return false;
}
}
/**
* Sends a notice about deprecated use of a function, view, etc.
* Note: This will ALWAYS at least log a warning. Don't use to pre-deprecate things.
* This assumes we are releasing in order and deprecating according to policy.
*
* @param str $msg Message to log / display.
* @param str $version human-readable *release* version the function was deprecated. No bloody A, B, (R)C, or D.
*
* @return bool
*/
function elgg_deprecated_notice($msg, $dep_version) {
// if it's a major release behind, visual and logged
// if it's a 2 minor releases behind, visual and logged
// if it's 1 minor release behind, logged.
// bugfixes don't matter because you're not deprecating between them, RIGHT?
if (!$dep_version) {
return FALSE;
}
$elgg_version = get_version(TRUE);
$elgg_version_arr = explode('.', $elgg_version);
$elgg_major_version = $elgg_version_arr[0];
$elgg_minor_version = $elgg_version_arr[1];
$dep_version_arr = explode('.', $dep_version);
$dep_major_version = $dep_version_arr[0];
$dep_minor_version = $dep_version_arr[1];
$last_working_version = $dep_minor_version - 1;
$visual = FALSE;
// use version_compare to account for 1.7a < 1.7
if (($dep_major_version < $elgg_major_version)
|| (($elgg_minor_version - $last_working_version) > 1)) {
$visual = TRUE;
}
$msg = "Deprecated in $dep_version: $msg";
if ($visual) {
register_error($msg);
}
// Get a file and line number for the log. Never show this in the UI.
// Skip over the function that sent this notice and see who called the deprecated
// function itself.
$backtrace = debug_backtrace();
$caller = $backtrace[1];
$msg .= " (Called from {$caller['file']}:{$caller['line']})";
elgg_log($msg, 'WARNING');
return TRUE;
}
/**
* Privilege elevation and gatekeeper code
*/
/**
* Gatekeeper function which ensures that a we are being executed from
* a specified location.
*
* To use, call this function with the function name (and optional file location) that it has to be called
* from, it will either return true or false.
*
* e.g.
*
* function my_secure_function()
* {
* if (!call_gatekeeper("my_call_function"))
* return false;
*
* ... do secure stuff ...
* }
*
* function my_call_function()
* {
* // will work
* my_secure_function();
* }
*
* function bad_function()
* {
* // Will not work
* my_secure_function();
* }
*
* @param mixed $function The function that this function must have in its call stack,
* to test against a method pass an array containing a class and method name.
* @param string $file Optional file that the function must reside in.
*/
function call_gatekeeper($function, $file = "") {
// Sanity check
if (!$function) {
return false;
}
// Check against call stack to see if this is being called from the correct location
$callstack = debug_backtrace();
$stack_element = false;
foreach ($callstack as $call) {
if (is_array($function)) {
if (
(strcmp($call['class'], $function[0]) == 0) &&
(strcmp($call['function'], $function[1]) == 0)
) {
$stack_element = $call;
}
} else {
if (strcmp($call['function'], $function) == 0) {
$stack_element = $call;
}
}
}
if (!$stack_element) {
return false;
}
// If file then check that this it is being called from this function
if ($file) {
$mirror = null;
if (is_array($function)) {
$mirror = new ReflectionMethod($function[0], $function[1]);
} else {
$mirror = new ReflectionFunction($function);
}
if ((!$mirror) || (strcmp($file,$mirror->getFileName())!=0)) {
return false;
}
}
return true;
}
/**
* This function checks to see if it is being called at somepoint by a function defined somewhere
* on a given path (optionally including subdirectories).
*
* This function is similar to call_gatekeeper() but returns true if it is being called by a method or function which has been defined on a given path or by a specified file.
*
* @param string $path The full path and filename that this function must have in its call stack If a partial path is given and $include_subdirs is true, then the function will return true if called by any function in or below the specified path.
* @param bool $include_subdirs Are subdirectories of the path ok, or must you specify an absolute path and filename.
* @param bool $strict_mode If true then the calling method or function must be directly called by something on $path, if false the whole call stack is searched.
*/
function callpath_gatekeeper($path, $include_subdirs = true, $strict_mode = false) {
global $CONFIG;
$path = sanitise_string($path);
if ($path) {
$callstack = debug_backtrace();
foreach ($callstack as $call) {
$call['file'] = str_replace("\\","/",$call['file']);
if ($include_subdirs) {
if (strpos($call['file'], $path) === 0) {
if ($strict_mode) {
$callstack[1]['file'] = str_replace("\\","/",$callstack[1]['file']);
if ($callstack[1] === $call) { return true; }
} else {
return true;
}
}
} else {
if (strcmp($path, $call['file'])==0) {
if ($strict_mode) {
if ($callstack[1] === $call) {
return true;
}
} else {
return true;
}
}
}
}
return false;
}
if (isset($CONFIG->debug)) {
system_message("Gatekeeper'd function called from {$callstack[1]['file']}:{$callstack[1]['line']}\n\nStack trace:\n\n" . print_r($callstack, true));
}
return false;
}
/**
* Returns true or false depending on whether a PHP .ini setting is on or off
*
* @param string $ini_get_arg The INI setting
* @return true|false Depending on whether it's on or off
*/
function ini_get_bool($ini_get_arg) {
$temp = ini_get($ini_get_arg);
if ($temp == '1' or strtolower($temp) == 'on') {
return true;
}
return false;
}
/**
* Function to be used in array_filter which returns true if $string is not null.
*
* @param string $string
* @return bool
*/
function is_not_null($string) {
if (($string==='') || ($string===false) || ($string===null)) {
return false;
}
return true;
}
/**
* Normalise the singular keys in an options array
* to the plural keys.
*
* @param $options
* @param $singulars
* @return array
*/
function elgg_normalise_plural_options_array($options, $singulars) {
foreach ($singulars as $singular) {
$plural = $singular . 's';
// normalize the singular to plural
// isset() returns FALSE for array values of NULL, so they are ignored.
// everything else falsy is included.
//if (isset($options[$singular]) && $options[$singular] !== NULL && $options[$singular] !== FALSE) {
if (isset($options[$singular])) {
if (isset($options[$plural])) {
if (is_array($options[$plural])) {
$options[$plural][] = $options[$singlar];
} else {
$options[$plural] = array($options[$plural], $options[$singular]);
}
} else {
$options[$plural] = array($options[$singular]);
}
}
unset($options[$singular]);
}
return $options;
}
/**
* Get the full URL of the current page.
*
* @return string The URL
*/
function full_url() {
$s = empty($_SERVER["HTTPS"]) ? '' : ($_SERVER["HTTPS"] == "on") ? "s" : "";
$protocol = substr(strtolower($_SERVER["SERVER_PROTOCOL"]), 0, strpos(strtolower($_SERVER["SERVER_PROTOCOL"]), "/")) . $s;
$port = ($_SERVER["SERVER_PORT"] == "80" || $_SERVER["SERVER_PORT"] == "443") ? "" : (":".$_SERVER["SERVER_PORT"]);
$quotes = array('\'', '"');
$encoded = array('%27', '%22');
return $protocol . "://" . $_SERVER['SERVER_NAME'] . $port . str_replace($quotes, $encoded, $_SERVER['REQUEST_URI']);
}
/**
* Useful function found in the comments on the PHP man page for ip2long.
* Returns 1 if an IP matches a given range.
*
* TODO: Check licence... assuming this is PD since it was found several places on the interwebs..
* please check or rewrite.
*
* Matches:
* xxx.xxx.xxx.xxx (exact)
* xxx.xxx.xxx.[yyy-zzz] (range)
* xxx.xxx.xxx.xxx/nn (nn = # bits, cisco style -- i.e. /24 = class C)
* Does not match:
* xxx.xxx.xxx.xx[yyy-zzz] (range, partial octets not supported)
*/
function test_ip($range, $ip) {
$result = 1;
# IP Pattern Matcher
# J.Adams
#
# Matches:
#
# xxx.xxx.xxx.xxx (exact)
# xxx.xxx.xxx.[yyy-zzz] (range)
# xxx.xxx.xxx.xxx/nn (nn = # bits, cisco style -- i.e. /24 = class C)
#
# Does not match:
# xxx.xxx.xxx.xx[yyy-zzz] (range, partial octets not supported)
if (ereg("([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)/([0-9]+)",$range,$regs)) {
# perform a mask match
$ipl = ip2long($ip);
$rangel = ip2long($regs[1] . "." . $regs[2] . "." . $regs[3] . "." . $regs[4]);
$maskl = 0;
for ($i = 0; $i< 31; $i++) {
if ($i < $regs[5]-1) {
$maskl = $maskl + pow(2,(30-$i));
}
}
if (($maskl & $rangel) == ($maskl & $ipl)) {
return 1;
} else {
return 0;
}
} else {
# range based
$maskocts = split("\.",$range);
$ipocts = split("\.",$ip);
# perform a range match
for ($i=0; $i<4; $i++) {
if (ereg("\[([0-9]+)\-([0-9]+)\]",$maskocts[$i],$regs)) {
if ( ($ipocts[$i] > $regs[2]) || ($ipocts[$i] < $regs[1])) {
$result = 0;
}
} else {
if ($maskocts[$i] <> $ipocts[$i]) {
$result = 0;
}
}
}
}
return $result;
}
/**
* Match an IP address against a number of ip addresses or ranges, returning true if found.
*
* @param array $networks
* @param string $ip
* @return bool
*/
function is_ip_in_array(array $networks, $ip) {
global $SYSTEM_LOG;
foreach ($networks as $network) {
if (test_ip(trim($network), $ip)) {
return true;
}
}
return false;
}
/**
* An interface for objects that behave as elements within a social network that have a profile.
*
*/
interface Friendable {
/**
* Adds a user as a friend
*
* @param int $friend_guid The GUID of the user to add
*/
public function addFriend($friend_guid);
/**
* Removes a user as a friend
*
* @param int $friend_guid The GUID of the user to remove
*/
public function removeFriend($friend_guid);
/**
* Determines whether or not the current user is a friend of this entity
*
*/
public function isFriend();
/**
* Determines whether or not this entity is friends with a particular entity
*
* @param int $user_guid The GUID of the entity this entity may or may not be friends with
*/
public function isFriendsWith($user_guid);
/**
* Determines whether or not a foreign entity has made this one a friend
*
* @param int $user_guid The GUID of the foreign entity
*/
public function isFriendOf($user_guid);
/**
* Returns this entity's friends
*
* @param string $subtype The subtype of entity to return
* @param int $limit The number of entities to return
* @param int $offset Indexing offset
*/
public function getFriends($subtype = "", $limit = 10, $offset = 0);
/**
* Returns entities that have made this entity a friend
*
* @param string $subtype The subtype of entity to return
* @param int $limit The number of entities to return
* @param int $offset Indexing offset
*/
public function getFriendsOf($subtype = "", $limit = 10, $offset = 0);
/**
* Returns objects in this entity's container
*
* @param string $subtype The subtype of entity to return
* @param int $limit The number of entities to return
* @param int $offset Indexing offset
*/
public function getObjects($subtype="", $limit = 10, $offset = 0);
/**
* Returns objects in the containers of this entity's friends
*
* @param string $subtype The subtype of entity to return
* @param int $limit The number of entities to return
* @param int $offset Indexing offset
*/
public function getFriendsObjects($subtype = "", $limit = 10, $offset = 0);
/**
* Returns the number of object entities in this entity's container
*
* @param string $subtype The subtype of entity to count
*/
public function countObjects($subtype = "");
}
/**
* Handles formatting of ampersands in urls
*
* @param string $url
* @return string
* @since 1.7.1
*/
function elgg_format_url($url) {
return preg_replace('/&(?!amp;)/', '&', $url);
}
/**
* Rebuilds a parsed (partial) URL
*
* @param array $parts Associative array of URL components like parse_url() returns
* @param bool $htmlencode HTML Encode the url?
* @return str Full URL
* @since 1.7
*/
function elgg_http_build_url(array $parts, $html_encode = TRUE) {
// build only what's given to us.
$scheme = isset($parts['scheme']) ? "{$parts['scheme']}://" : '';
$host = isset($parts['host']) ? "{$parts['host']}" : '';
$port = isset($parts['port']) ? ":{$parts['port']}" : '';
$path = isset($parts['path']) ? "{$parts['path']}" : '';
$query = isset($parts['query']) ? "?{$parts['query']}" : '';
$string = $scheme . $host . $port . $path . $query;
if ($html_encode) {
return elgg_format_url($string);
} else {
return $string;
}
}
/**
* Adds action tokens to URL
*
* @param str $link Full action URL
* @param bool $htmlencode html encode the url?
* @return str URL with action tokens
* @since 1.7
*/
function elgg_add_action_tokens_to_url($url, $html_encode = TRUE) {
$components = parse_url($url);
if (isset($components['query'])) {
$query = elgg_parse_str($components['query']);
} else {
$query = array();
}
if (isset($query['__elgg_ts']) && isset($query['__elgg_token'])) {
return $url;
}
// append action tokens to the existing query
$query['__elgg_ts'] = time();
$query['__elgg_token'] = generate_action_token($query['__elgg_ts']);
$components['query'] = http_build_query($query);
// rebuild the full url
return elgg_http_build_url($components, $html_encode);
}
/**
* @deprecated 1.7 final
*/
function elgg_validate_action_url($url) {
elgg_deprecated_notice('elgg_validate_action_url had a short life. Use elgg_add_action_tokens_to_url() instead.', '1.7b');
return elgg_add_action_tokens_to_url($url);
}
/**
* Removes a single elementry from a (partial) url query.
*
* @param string $url
* @param string $element
* @return string
*/
function elgg_http_remove_url_query_element($url, $element) {
$url_array = parse_url($url);
if (isset($url_array['query'])) {
$query = elgg_parse_str($url_array['query']);
} else {
// nothing to remove. Return original URL.
return $url;
}
if (array_key_exists($element, $query)) {
unset($query[$element]);
}
$url_array['query'] = http_build_query($query);
$string = elgg_http_build_url($url_array);
return $string;
}
/**
* Adds get params to $url
*
* @param str $url
* @param array $elements k/v pairs.
* @return str
*/
function elgg_http_add_url_query_elements($url, array $elements) {
$url_array = parse_url($url);
if (isset($url_array['query'])) {
$query = elgg_parse_str($url_array['query']);
} else {
$query = array();
}
foreach ($elements as $k => $v) {
$query[$k] = $v;
}
$url_array['query'] = http_build_query($query);
$string = elgg_http_build_url($url_array);
return $string;
}
/**
* Breadcrumb support.
*/
/**
* Adds a breadcrumb to the stack
*
* @param string $title The title to display
* @param string $link Optional. The link for the title.
*/
function elgg_push_breadcrumb($title, $link = NULL) {
global $CONFIG;
if (!is_array($CONFIG->breadcrumbs)) {
$CONFIG->breadcrumbs = array();
}
// avoid key collisions.
$CONFIG->breadcrumbs[] = array('title' => $title, 'link' => $link);
}
/**
* Removes last breadcrumb entry.
*
* @return array popped item.
*/
function elgg_pop_breadcrumb() {
global $CONFIG;
if (is_array($CONFIG->breadcrumbs)) {
array_pop($CONFIG->breadcrumbs);
}
return FALSE;
}
/**
* Returns all breadcrumbs
*
* @return array Breadcrumbs
*/
function elgg_get_breadcrumbs() {
global $CONFIG;
return (is_array($CONFIG->breadcrumbs)) ? $CONFIG->breadcrumbs : array();
}
/**
* Sticky forms
*/
/**
* Load all the REQUEST variables into the sticky form cache
*
* Call this from an action when you want all your submitted variables
* available if the submission fails validation and is sent back to the form
*/
function elgg_make_sticky_form($form_name) {
global $CONFIG;
$CONFIG->active_sticky_form = $form_name;
elgg_clear_sticky_form($form_name);
if (!isset($_SESSION['sticky_forms'])) {
$_SESSION['sticky_forms'] = array();
}
$_SESSION['sticky_forms'][$form_name] = array();
foreach($_REQUEST as $key => $var) {
// will go through XSS filtering on the get function
$_SESSION['sticky_forms'][$form_name][$key] = $var;
}
}
/**
* Clear the sticky form cache
*
* Call this if validation is successful in the action handler or
* when they sticky values have been used to repopulate the form
* after a validation error.
*
* @param string $name Form namespace
*/
function elgg_clear_sticky_form($form_name) {
unset($_SESSION['sticky_forms'][$form_name]);
}
/**
* Has this form been made sticky
*
* @param string $name Form namespace
* @return boolean
*/
function elgg_is_sticky_form($form_name) {
return isset($_SESSION['sticky_forms'][$form_name]);
}
/**
* Get a specific stick variable
*
* @param string $variable The name of the variable
* @param mixed $default Default value if the variable does not exist in sticky cache
* @param boolean $filter_result Filter for bad input if true
* @return mixed
*
* @todo should this filter the default value?
*/
function elgg_get_sticky_value($form_name, $variable, $default = NULL, $filter_result = true) {
if (isset($_SESSION['sticky_forms'][$form_name][$variable])) {
$value = $_SESSION['sticky_forms'][$form_name][$variable];
if ($filter_result) {
// XSS filter result
$value = filter_tags($value);
}
return $value;
}
return $default;
}
/**
* Clear a specific sticky variable
*
* @param string $variable The name of the variable to clear
*/
function elgg_clear_sticky_value($form_name, $variable) {
unset($_SESSION['sticky_forms'][$form_name][$variable]);
}
/**
* Returns the current active sticky form.
* @return mixed Str | FALSE
*/
function elgg_get_active_sticky_form() {
global $CONFIG;
if (isset($CONFIG->active_sticky_form)) {
$form_name = $CONFIG->active_sticky_form;
} else {
return FALSE;
}
return (elgg_is_sticky_form($form_name)) ? $form_name : FALSE;
}
function elgg_set_active_sticky_form($form_name) {
global $CONFIG;
$CONFIG->active_sticky_form = $form_name;
}
/**
* Returns the PHP INI setting in bytes
*
* @param str $setting
* @return int
* @since 1.7
* @link http://www.php.net/manual/en/function.ini-get.php
*/
function elgg_get_ini_setting_in_bytes($setting) {
// retrieve INI setting
$val = ini_get($setting);
// convert INI setting when shorthand notation is used
$last = strtolower($val[strlen($val)-1]);
switch($last) {
case 'g':
$val *= 1024;
case 'm':
$val *= 1024;
case 'k':
$val *= 1024;
}
// return byte value
return $val;
}
/**
* Server javascript pages.
*
* @param $page
* @return unknown_type
*/
function js_page_handler($page) {
if (is_array($page) && sizeof($page)) {
$js = str_replace('.js','',$page[0]);
$return = elgg_view('js/' . $js);
header('Content-type: text/javascript');
header('Expires: ' . date('r',time() + 864000));
header("Pragma: public");
header("Cache-Control: public");
header("Content-Length: " . strlen($return));
echo $return;
exit;
}
}
/**
* This function is a shutdown hook registered on startup which does nothing more than trigger a
* shutdown event when the script is shutting down, but before database connections have been dropped etc.
*
*/
function __elgg_shutdown_hook() {
global $START_MICROTIME;
trigger_elgg_event('shutdown', 'system');
$time = (float)(microtime(TRUE) - $START_MICROTIME);
// demoted to NOTICE from DEBUG so javascript is not corrupted
elgg_log("Page {$_SERVER['REQUEST_URI']} generated in $time seconds", 'NOTICE');
}
/**
* Register functions for Elgg core
*
* @return unknown_type
*/
function elgg_init() {
// Page handler for JS
register_page_handler('js','js_page_handler');
// Register an event triggered at system shutdown
register_shutdown_function('__elgg_shutdown_hook');
}
function elgg_walled_garden_index() {
global $CONFIG;
$login = elgg_view('account/forms/login');
$layout = elgg_view_layout('one_column', $login);
echo page_draw('', $layout);
return TRUE;
}
/**
* Boot Elgg
* @return unknown_type
*/
function elgg_boot() {
global $CONFIG;
// Actions
register_action('comments/add');
register_action('comments/delete');
register_action('likes/add');
register_action('likes/delete');
elgg_view_register_simplecache('css');
elgg_view_register_simplecache('js/friendsPickerv1');
elgg_view_register_simplecache('js/initialise_elgg');
// check for external page view
if (isset($CONFIG->site) && $CONFIG->site instanceof ElggSite) {
$CONFIG->site->check_walled_garden();
}
}
/**
* Runs unit tests for the API.
*/
function elgg_api_test($hook, $type, $value, $params) {
global $CONFIG;
$value[] = $CONFIG->path . 'engine/tests/api/entity_getter_functions.php';
$value[] = $CONFIG->path . 'engine/tests/api/helpers.php';
$value[] = $CONFIG->path . 'engine/tests/regression/trac_bugs.php';
return $value;
}
/**
* Sorts out the featured URLs and the "more" dropdown
* @return array ('featured_urls' and 'more')
* @since 1.8
*/
function elgg_get_nav_items() {
$menu_items = get_register('menu');
$featured_urls_info = get_config('menu_items_featured_urls');
$more = array();
$featured_urls = array();
$featured_urls_sanitised = array();
// easier to compare with in_array() than embedded foreach()es
$valid_urls = array();
foreach ($menu_items as $info) {
$valid_urls[] = $info->value->url;
}
// make sure the url is a valid link.
// this prevents disabled plugins leaving behind
// valid links when no using a pagehandler.
foreach ($featured_urls_info as $info) {
if (in_array($info->value->url, $valid_urls)) {
$featured_urls[] = $info->value->url;
$featured_urls_sanitised[] = $info;
}
}
// add toolbar entries if not hiding dupes.
foreach ($menu_items as $name => $info) {
if (!in_array($info->value->url, $featured_urls)) {
$more[] = $info;
}
}
return array(
'featured' => $featured_urls_sanitised,
'more' => $more
);
}
/**
* Hook that registers the custom menu items.
* @since 1.8
*/
function add_custom_menu_items() {
if ($custom_items = get_config('menu_items_custom_items')) {
foreach ($custom_items as $url => $name) {
add_menu($name, $url);
}
}
}
/**
* Test two URLs to see if they are functionally identical.
*
* @param string $url1
* @param string $url2
* @param array $ignore_params - GET params to ignore in the comparison
* @return BOOL
* @since 1.8
*/
function elgg_http_url_is_identical($url1, $url2, $ignore_params = array('offset', 'limit')) {
global $CONFIG;
// if the server portion is missing but it starts with / then add the url in.
if (elgg_substr($url1, 0, 1) == '/') {
$url1 = $CONFIG->url . ltrim($url1, '/');
}
if (elgg_substr($url1, 0, 1) == '/') {
$url2 = $CONFIG->url . ltrim($url2, '/');
}
// @todo - should probably do something with relative URLs
if ($url1 == $url2) {
return TRUE;
}
$url1_info = parse_url($url1);
$url2_info = parse_url($url2);
$url1_info['path'] = trim($url1_info['path'], '/');
$url2_info['path'] = trim($url2_info['path'], '/');
// compare basic bits
$parts = array('scheme', 'host', 'path');
foreach ($parts as $part) {
if ((isset($url1_info[$part]) && isset($url2_info[$part])) && $url1_info[$part] != $url2_info[$part]) {
return FALSE;
} elseif (isset($url1_info[$part]) && !isset($url2_info[$part])) {
return FALSE;
} elseif (!isset($url1_info[$part]) && isset($url2_info[$part])) {
return FALSE;
}
}
// quick compare of get params
if (isset($url1_info['query']) && isset($url2_info['query']) && $url1_info['query'] == $url2_info['query']) {
return TRUE;
}
// compare get params that might be out of order
$url1_params = array();
$url2_params = array();
if (isset($url1_info['query'])) {
if ($url1_info['query'] = html_entity_decode($url1_info['query'])) {
$url1_params = elgg_parse_str($url1_info['query']);
}
}
if (isset($url2_info['query'])) {
if ($url2_info['query'] = html_entity_decode($url2_info['query'])) {
$url2_params = elgg_parse_str($url2_info['query']);
}
}
// drop ignored params
foreach ($ignore_params as $param) {
if (isset($url1_params[$param])) {
unset($url1_params[$param]);
}
if (isset($url2_params[$param])) {
unset($url2_params[$param]);
}
}
// array_diff_assoc only returns the items in arr1 that aren't in arrN
// but not the items that ARE in arrN but NOT in arr1
// if arr1 is an empty array, this function will return 0 no matter what.
// since we only care if they're different and not how different,
// add the results together to get a non-zero (ie, different) result
$diff_count = count(array_diff_assoc($url1_params, $url2_params));
$diff_count += count(array_diff_assoc($url2_params, $url1_params));
if ($diff_count > 0) {
return FALSE;
}
return TRUE;
}
/**
* Some useful constant definitions
*/
define('ACCESS_DEFAULT', -1);
define('ACCESS_PRIVATE', 0);
define('ACCESS_LOGGED_IN', 1);
define('ACCESS_PUBLIC', 2);
define('ACCESS_FRIENDS', -2);
define('ELGG_ENTITIES_ANY_VALUE', NULL);
define('ELGG_ENTITIES_NO_VALUE', 0);
register_elgg_event_handler('init', 'system', 'elgg_init');
register_elgg_event_handler('boot', 'system', 'elgg_boot', 1000);
register_plugin_hook('unit_test', 'system', 'elgg_api_test');
register_elgg_event_handler('init', 'system', 'add_custom_menu_items', 1000);