diff options
Diffstat (limited to 'engine/lib/actions.php')
| -rw-r--r-- | engine/lib/actions.php | 163 |
1 files changed, 92 insertions, 71 deletions
diff --git a/engine/lib/actions.php b/engine/lib/actions.php index 99e22e104..44d1a715d 100644 --- a/engine/lib/actions.php +++ b/engine/lib/actions.php @@ -2,21 +2,23 @@ /** * Elgg Actions * - * Actions are the primary controllers (The C in MVC) in Elgg. They are - * registered by {@link register_elgg_action()} and are called either by URL - * http://elggsite.org/action/action_name or {@link action($action_name}. For - * URLs, a rewrite rule in .htaccess passes the action name to - * engine/handlers/action_handler.php, which dispatches the action. + * Actions are one of the primary controllers (The C in MVC) in Elgg. They are + * registered by {@link register_elgg_action()} and are called by URL + * http://elggsite.org/action/action_name. For URLs, a rewrite rule in + * .htaccess passes the action name to engine/handlers/action_handler.php, + * which dispatches the request for the action. * - * An action name should be registered to exactly one file in the system, usually under - * the actions/ directory. + * An action name must be registered to a file in the system. Core actions are + * found in /actions/ and plugin actions are usually under /mod/<plugin>/actions/. + * It is recommended that actions be namespaced to avoid collisions. * * All actions require security tokens. Using the {@elgg_view input/form} view - * will automatically add tokens as hidden inputs. To manually add hidden inputs, - * use the {@elgg_view input/securitytoken} view. + * will automatically add tokens as hidden inputs as will the elgg_view_form() + * function. To manually add hidden inputs, use the {@elgg_view input/securitytoken} view. * * To include security tokens for actions called via GET, use - * {@link elgg_add_security_tokens_to_url()}. + * {@link elgg_add_security_tokens_to_url()} or specify is_action as true when + * using {@lgg_view output/url}. * * Action tokens can be manually generated by using {@link generate_action_token()}. * @@ -31,30 +33,30 @@ */ /** -* Perform an action. -* -* This function executes the action with name $action as -* registered by {@link elgg_register_action()}. -* -* The plugin hook action, $action_name will be emitted before -* the action is executed. If a handler returns false, it will -* prevent the action from being called. -* -* @note If an action isn't registered in the system or is registered -* to an unavailable file the user will be forwarded to the site front -* page and an error will be emitted via {@link register_error()}. -* -* @warning All actions require {@link http://docs.elgg.org/Actions/Tokens Action Tokens}. -* @warning Most plugin shouldn't call this manually. -* -* @param string $action The requested action -* @param string $forwarder Optionally, the location to forward to -* -* @link http://docs.elgg.org/Actions -* @see elgg_register_action() -* -* @return void -*/ + * Perform an action. + * + * This function executes the action with name $action as registered + * by {@link elgg_register_action()}. + * + * The plugin hook 'action', $action_name will be triggered before the action + * is executed. If a handler returns false, it will prevent the action script + * from being called. + * + * @note If an action isn't registered in the system or is registered + * to an unavailable file the user will be forwarded to the site front + * page and an error will be emitted via {@link register_error()}. + * + * @warning All actions require {@link http://docs.elgg.org/Actions/Tokens Action Tokens}. + * + * @param string $action The requested action + * @param string $forwarder Optionally, the location to forward to + * + * @link http://docs.elgg.org/Actions + * @see elgg_register_action() + * + * @return void + * @access private + */ function action($action, $forwarder = "") { global $CONFIG; @@ -123,9 +125,8 @@ function action($action, $forwarder = "") { /** * Registers an action. * - * Actions are registered to a single file in the system and are executed - * either by the URL http://elggsite.org/action/action_name or by calling - * {@link action()}. + * Actions are registered to a script in the system and are executed + * either by the URL http://elggsite.org/action/action_name/. * * $filename must be the full path of the file to register, or a path relative * to the core actions/ dir. @@ -137,8 +138,7 @@ function action($action, $forwarder = "") { * * @tip Put action files under the actions/<plugin_name> directory of your plugin. * - * @tip You don't need to include engine/start.php, call {@link gatekeeper()}, - * or call {@link admin_gatekeeper()}. + * @tip You don't need to include engine/start.php in your action files. * * @internal Actions are saved in $CONFIG->actions as an array in the form: * <code> @@ -151,13 +151,13 @@ function action($action, $forwarder = "") { * @param string $action The name of the action (eg "register", "account/settings/save") * @param string $filename Optionally, the filename where this action is located. If not specified, * will assume the action is in elgg/actions/<action>.php - * @param string $access Who is allowed to execute this action: admin, public, or logged_in. + * @param string $access Who is allowed to execute this action: public, logged_in, admin. * (default: logged_in) * * @see action() * @see http://docs.elgg.org/Actions * - * @return true + * @return bool */ function elgg_register_action($action, $filename = "", $access = 'logged_in') { global $CONFIG; @@ -187,16 +187,31 @@ function elgg_register_action($action, $filename = "", $access = 'logged_in') { } /** + * Unregisters an action + * + * @param string $action Action name + * @return bool + * @since 1.8.1 + */ +function elgg_unregister_action($action) { + global $CONFIG; + + if (isset($CONFIG->actions[$action])) { + unset($CONFIG->actions[$action]); + return true; + } else { + return false; + } +} + +/** * Validate an action token. * - * Calls to actions will automatically validate tokens. - * If tokens are not present or invalid, the action will be - * denied and the user will be redirected to the front page. + * Calls to actions will automatically validate tokens. If tokens are not + * present or invalid, the action will be denied and the user will be redirected. * * Plugin authors should never have to manually validate action tokens. * - * @access private - * * @param bool $visibleerrors Emit {@link register_error()} errors on failure? * @param mixed $token The token to test against. Default: $_REQUEST['__elgg_token'] * @param mixed $ts The time stamp to test against. Default: $_REQUEST['__elgg_ts'] @@ -204,6 +219,7 @@ function elgg_register_action($action, $filename = "", $access = 'logged_in') { * @return bool * @see generate_action_token() * @link http://docs.elgg.org/Actions/Tokens + * @access private */ function validate_action_token($visibleerrors = TRUE, $token = NULL, $ts = NULL) { global $CONFIG; @@ -265,17 +281,17 @@ function validate_action_token($visibleerrors = TRUE, $token = NULL, $ts = NULL) } /** -* Validates the presence of action tokens. -* -* This function is called for all actions. If action tokens are missing, -* the user will be forwarded to the site front page and an error emitted. -* -* This function verifies form input for security features (like a generated token), and forwards -* the page if they are invalid. -* -* @access private -* @return mixed True if valid, or redirects to front page and exists. -*/ + * Validates the presence of action tokens. + * + * This function is called for all actions. If action tokens are missing, + * the user will be forwarded to the site front page and an error emitted. + * + * This function verifies form input for security features (like a generated token), + * and forwards if they are invalid. + * + * @return mixed True if valid or redirects. + * @access private + */ function action_gatekeeper() { if (validate_action_token()) { return TRUE; @@ -301,6 +317,7 @@ function action_gatekeeper() { * @example actions/manual_tokens.php * * @return string|false + * @access private */ function generate_action_token($timestamp) { $site_secret = get_site_secret(); @@ -352,7 +369,7 @@ function get_site_secret() { } /** - * Check if an action is registered and its file exists. + * Check if an action is registered and its script exists. * * @param string $action Action name * @@ -366,21 +383,10 @@ function elgg_action_exists($action) { } /** - * Initialize some ajaxy actions features - */ -function actions_init() { - elgg_register_action('security/refreshtoken', '', 'public'); - - elgg_register_simplecache_view('js/languages/en'); - - elgg_register_plugin_hook_handler('action', 'all', 'ajax_action_hook'); - elgg_register_plugin_hook_handler('forward', 'all', 'ajax_forward_hook'); -} - -/** * Checks whether the request was requested via ajax * * @return bool whether page was requested via ajax + * @since 1.8.0 */ function elgg_is_xhr() { return isset($_SERVER['HTTP_X_REQUESTED_WITH']) @@ -409,7 +415,8 @@ function elgg_is_xhr() { * @param string $type * @param string $reason * @param array $params - * + * @return void + * @access private */ function ajax_forward_hook($hook, $type, $reason, $params) { if (elgg_is_xhr()) { @@ -464,6 +471,8 @@ function ajax_forward_hook($hook, $type, $reason, $params) { /** * Buffer all output echo'd directly in the action for inclusion in the returned JSON. + * @return void + * @access private */ function ajax_action_hook() { if (elgg_is_xhr()) { @@ -471,4 +480,16 @@ function ajax_action_hook() { } } +/** + * Initialize some ajaxy actions features + */ +function actions_init() { + elgg_register_action('security/refreshtoken', '', 'public'); + + elgg_register_simplecache_view('js/languages/en'); + + elgg_register_plugin_hook_handler('action', 'all', 'ajax_action_hook'); + elgg_register_plugin_hook_handler('forward', 'all', 'ajax_forward_hook'); +} + elgg_register_event_handler('init', 'system', 'actions_init'); |