diff options
| -rw-r--r-- | engine/lib/actions.php | 87 |
1 files changed, 86 insertions, 1 deletions
diff --git a/engine/lib/actions.php b/engine/lib/actions.php index 63ddfcbfb..fef6004cc 100644 --- a/engine/lib/actions.php +++ b/engine/lib/actions.php @@ -351,4 +351,89 @@ function elgg_action_exist($action) { global $CONFIG; return (isset($CONFIG->actions[$action]) && file_exists($CONFIG->actions[$action]['file'])); -}
\ No newline at end of file +} + +/** + * Initialize some ajaxy actions features + */ +function actions_init() +{ + register_action('security/refreshtoken', TRUE); + + elgg_view_register_simplecache('js/languages/en'); + + register_plugin_hook('action', 'all', 'ajax_action_hook'); + register_plugin_hook('forward', 'all', 'ajax_forward_hook'); +} + +/** + * Checks whether the request was requested via ajax + * + * @return bool whether page was requested via ajax + */ +function elgg_is_xhr() { + return isset($_SERVER['HTTP_X_REQUESTED_WITH']) + && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest'; +} + +/** + * Catch calls to forward() in ajax request and force an exit. + * + * Forces response is json of the following form: + * <pre> + * { + * "current_url": "the.url.we/were/coming/from", + * "forward_url": "the.url.we/were/going/to", + * "system_messages": { + * "messages": ["msg1", "msg2", ...], + * "errors": ["err1", "err2", ...] + * }, + * "status": -1 //or 0 for success if there are no error messages present + * } + * </pre> + * where "system_messages" is all message registers at the point of forwarding + * + * @param string $hook + * @param string $type + * @param string $reason + * @param array $params + * + */ +function ajax_forward_hook($hook, $type, $reason, $params) { + if (elgg_is_xhr()) { + //grab any data echo'd in the action + $output = ob_get_clean(); + + //Avoid double-encoding in case data is json + $json = json_decode($output); + if (isset($json)) { + $params['output'] = $json; + } else { + $params['output'] = $output; + } + + //Grab any system messages so we can inject them via ajax too + $params['system_messages'] = system_messages(NULL, ""); + + if (isset($params['system_messages']['errors'])) { + $params['status'] = -1; + } else { + $params['status'] = 0; + } + + header("Content-type: application/json"); + echo json_encode($params); + exit; + } +} + +/** + * Buffer all output echo'd directly in the action for inclusion in the returned JSON. + */ +function ajax_action_hook() { + if (elgg_is_xhr()) { + ob_start(); + } +} + +register_elgg_event_handler('init', 'system', 'actions_init');
\ No newline at end of file |