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<?php
/**
* Elgg groups plugin
*
* @package ElggGroups
* @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
* @author Marcus Povey
* @copyright Curverider Ltd 2008
* @link http://elgg.com/
*/
/**
* Initialise the groups plugin.
* Register actions, set up menus
*/
function groups_init()
{
global $CONFIG;
// Set up the menu for logged in users
if (isloggedin())
{
add_menu(elgg_echo('groups'), $CONFIG->wwwroot . "pg/groups/owned/" . $_SESSION['user']->username,'groups');
add_menu(elgg_echo('groups:alldiscussion'),$CONFIG->wwwroot."mod/groups/discussions.php");
}
else
{
add_menu(elgg_echo('groups'), $CONFIG->wwwroot . "mod/groups/",array(
menu_item(elgg_echo('groups:all'),$CONFIG->wwwroot."mod/groups/all.php"),
));
}
// Register a page handler, so we can have nice URLs
register_page_handler('groups','groups_page_handler');
// Register a URL handler for groups
register_entity_url_handler('groups_url','group','all');
// Register an icon handler for groups
register_page_handler('icon','groups_icon_handler');
// Register some actions
register_action("groups/edit",false, $CONFIG->pluginspath . "groups/actions/edit.php");
register_action("groups/join",false, $CONFIG->pluginspath . "groups/actions/join.php");
register_action("groups/leave",false, $CONFIG->pluginspath . "groups/actions/leave.php");
register_action("groups/joinrequest",false, $CONFIG->pluginspath . "groups/actions/joinrequest.php");
register_action("groups/addtogroup",false, $CONFIG->pluginspath . "groups/actions/addtogroup.php");
// Use group widgets
use_widgets('groups');
// Add a page owner handler
add_page_owner_handler('groups_page_owner_handler');
// Add some widgets
add_widget_type('group_members_widget',elgg_echo('groups:widgets:members:title'), elgg_echo('groups:widgets:members:description'), 'groups');
add_widget_type('group_entities_widget',elgg_echo('groups:widgets:entities:title'), elgg_echo('groups:widgets:entities:description'), 'groups');
//extend some views
extend_view('profile/icon','groups/icon');
extend_view('css','groups/css');
// Write access permissions
register_plugin_hook('access:collections:write', 'all', 'groups_write_acl_plugin_hook');
// For now, we'll hard code the groups profile items as follows:
// TODO make this user configurable
// Language short codes must be of the form "groups:key"
// where key is the array key below
$CONFIG->group = array(
'name' => 'text',
'description' => 'longtext',
'briefdescription' => 'text',
'interests' => 'tags',
'website' => 'url',
);
}
/**
* Sets up submenus for the groups system. Triggered on pagesetup.
*
*/
function groups_submenus() {
global $CONFIG;
// Get the page owner entity
$page_owner = page_owner_entity();
// Submenu items for all group pages
if ($page_owner instanceof ElggGroup) {
if ($page_owner->canEdit()) {
add_submenu_item(elgg_echo('groups:edit'),$CONFIG->wwwroot . "mod/groups/edit.php?group_guid=" . $page_owner->getGUID());
add_submenu_item(elgg_echo('groups:invite'),$CONFIG->wwwroot . "mod/groups/invite.php?group_guid={$page_owner->getGUID()}");
}
if ($page_owner->isMember($_SESSION['user'])) {
add_submenu_item(elgg_echo('groups:leave'), $CONFIG->wwwroot . "action/groups/leave?group_guid=" . $page_owner->getGUID());
} else {
if ($page_owner->isPublicMembership())
{
add_submenu_item(elgg_echo('groups:join'),$CONFIG->wwwroot . "action/groups/join?group_guid={$page_owner->getGUID()}");
}
else
{
add_submenu_item(elgg_echo('groups:joinrequest'),$CONFIG->wwwroot . "action/groups/joinrequest?group_guid={$page_owner->getGUID()}");
}
}
add_submenu_item(elgg_echo('groups:forum'),$CONFIG->wwwroot . "pg/groups/forum/{$page_owner->getGUID()}/");
}
// Add submenu options
if (get_context() == "groups") {
if ((page_owner() == $_SESSION['guid'] || !page_owner()) && isloggedin()) {
add_submenu_item(elgg_echo('groups:new'), $CONFIG->wwwroot."pg/groups/new/");
add_submenu_item(elgg_echo('groups:yours'), $CONFIG->wwwroot . "pg/groups/owned/" . $_SESSION['user']->username);
add_submenu_item(elgg_echo('groups:all'), $CONFIG->wwwroot . "pg/groups/world/");
} else if (page_owner()) {
$page_owner = page_owner_entity();
add_submenu_item(sprintf(elgg_echo('groups:yours'), $CONFIG->wwwroot . "pg/groups/owned/" . $page_owner->username));
add_submenu_item(elgg_echo('groups:all'), $CONFIG->wwwroot . "pg/groups/world/");
} else {
add_submenu_item(elgg_echo('groups:all'), $CONFIG->wwwroot . "pg/groups/world/");
}
}
}
/**
* Set a page owner handler.
*
*/
function groups_page_owner_handler()
{
$group_guid = get_input('group_guid');
if ($group_guid)
{
$group = get_entity($group_guid);
if ($group instanceof ElggGroup)
return $group->owner_guid;
}
return false;
}
/**
* Group page handler
*
* @param array $page Array of page elements, forwarded by the page handling mechanism
*/
function groups_page_handler($page)
{
global $CONFIG;
if (isset($page[0]))
{
// See what context we're using
switch($page[0])
{
case "new" :
include($CONFIG->pluginspath . "groups/new.php");
break;
case "world":
include($CONFIG->pluginspath . "groups/all.php");
break;
case "forum":
set_input('group_guid', $page[1]);
include($CONFIG->pluginspath . "groups/forum.php");
break;
case "owned" :
// Owned by a user
if (isset($page[1]))
set_input('username',$page[1]);
include($CONFIG->pluginspath . "groups/index.php");
break;
default:
set_input('group_guid', $page[0]);
include($CONFIG->pluginspath . "groups/groupprofile.php");
break;
}
}
}
/**
* Populates the ->getUrl() method for group objects
*
* @param ElggEntity $entity File entity
* @return string File URL
*/
function groups_url($entity) {
global $CONFIG;
$title = friendly_title($entity->name);
return $CONFIG->url . "pg/groups/{$entity->guid}/$title/";
}
/**
* Groups created, so add users to access lists.
*/
function groups_create_event_listener($event, $object_type, $object)
{
//if (($event == 'create') && ($object_type == 'group') && ($object instanceof ElggGroup))
//{
$group_id = create_access_collection(elgg_echo('groups:group') . ": " . $object->name);
if ($group_id)
{
$object->group_acl = $group_id;
}
else
return false;
//}
return true;
}
/**
* Hook to listen to read access control requests and return all the groups you are a member of.
*/
function groups_read_acl_plugin_hook($hook, $entity_type, $returnvalue, $params)
{
//error_log("READ: " . var_export($returnvalue));
$user = $_SESSION['user'];
if ($user)
{
$membership = get_users_membership($user->guid);
if ($membership)
{
foreach ($membership as $group)
$returnvalue[$user->guid][$group->group_acl] = elgg_echo('groups:group') . ": " . $group->name;
return $returnvalue;
}
}
}
/**
* Return the write access for the current group if the user has write access to it.
*/
function groups_write_acl_plugin_hook($hook, $entity_type, $returnvalue, $params)
{
$page_owner = page_owner_entity();
if ($page_owner instanceof ElggGroup)
{
if (can_write_to_container())
{
$returnvalue[$page_owner->group_acl] = elgg_echo('groups:group') . ": " . $page_owner->name;
return $returnvalue;
}
}
}
/**
* Groups deleted, so remove access lists.
*/
function groups_delete_event_listener($event, $object_type, $object)
{
delete_access_collection($object->access_id);
return true;
}
/**
* Listens to a group join event and adds a user to the group's access control
*
*/
function groups_user_join_event_listener($event, $object_type, $object) {
$group = $object['group'];
$user = $object['user'];
$acl = $group->group_acl;
add_user_to_access_collection($user->guid, $acl);
return true;
}
/**
* Listens to a group leave event and removes a user from the group's access control
*
*/
function groups_user_leave_event_listener($event, $object_type, $object) {
$group = $object['group'];
$user = $object['user'];
$acl = $group->group_acl;
remove_user_from_access_collection($user->guid, $acl);
return true;
}
// Register a handler for create groups
register_elgg_event_handler('create', 'group', 'groups_create_event_listener');
// Register a handler for delete groups
register_elgg_event_handler('delete', 'group', 'groups_delete_event_listener');
// Make sure the groups initialisation function is called on initialisation
register_elgg_event_handler('init','system','groups_init');
register_elgg_event_handler('join','group','groups_user_join_event_listener');
register_elgg_event_handler('leave','group','groups_user_leave_event_listener');
register_elgg_event_handler('pagesetup','system','groups_submenus');
// Register actions
global $CONFIG;
register_action("groups/addtopic",false,$CONFIG->pluginspath . "groups/actions/forums/addtopic.php",true);
register_action("groups/deletetopic",false,$CONFIG->pluginspath . "groups/actions/forums/deletetopic.php",true);
register_action("groups/addpost",false,$CONFIG->pluginspath . "groups/actions/forums/addpost.php",true);
register_action("groups/edittopic",false,$CONFIG->pluginspath . "groups/actions/forums/edittopic.php",true);
?>
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