From eba31495c573836877c20fffdd833352738067ec Mon Sep 17 00:00:00 2001 From: ben Date: Tue, 12 Feb 2008 12:46:30 +0000 Subject: Introducing views and some sanitisation git-svn-id: https://code.elgg.org/elgg/trunk@6 36083f99-b078-4883-b0ff-0f9b5a30f544 --- engine/lib/elgglib.php | 175 ++++++++++++++++++++++++++++++++++++++++++++++++- engine/start.php | 29 ++++++-- 2 files changed, 199 insertions(+), 5 deletions(-) (limited to 'engine') diff --git a/engine/lib/elgglib.php b/engine/lib/elgglib.php index dce99d0a4..734407530 100644 --- a/engine/lib/elgglib.php +++ b/engine/lib/elgglib.php @@ -13,11 +13,108 @@ */ /** - * Loading libraries ************************************************************************** + * Getting directories and moving the browser + */ + + /** + * Adds messages to the session so they'll be carried over, and forwards the browser. + * Returns false if headers have already been sent and the browser cannot be moved. + * + * @param string $location URL to forward to browser to + * @return nothing|false + */ + + function forward($location) { + + if (!headers_sent()) { + $_SESSION['messages'] = system_messages(); + header("Location: {$location}"); + exit; + } + return false; + + } + + /** + * Templating + */ + + /** + * Handles templating views + * + * @param string $view The name and location of the view to use + * @param array $vars Any variables that the view requires, passed as an array + * @param string $viewtype Optionally, the type of view that we're using (most commonly 'default') + * @param boolean $debug If set to true, the viewer will complain if it can't find a view + * @return string The HTML content + */ + function elgg_view($view, $vars = "", $viewtype = "", $debug = false) { + + global $CONFIG, $strings; + + static $usercache; + if (!is_array($usercache)) { + $usercache = array(); + } + + if (empty($vars)) { + $vars = array(); + } + + // Load session and configuration variables + if (is_array($_SESSION)) { + $vars = array_merge($vars, $_SESSION); + } + if (!empty($CONFIG)) + $vars = array_merge($vars, get_object_vars($CONFIG)); + if (is_callable('page_owner')) { + $vars['page_owner'] = page_owner(); + } else { + $vars['page_owner'] = -1; + } + if ($vars['page_owner'] != -1) { + if (!isset($usercache[$vars['page_owner']])) { + $vars['page_owner_user'] = get_user($vars['page_owner']); + $usercache[$vars['page_owner']] = $vars['page_owner_user']; + } else { + $vars['page_owner_user'] = $usercache[$vars['page_owner']]; + } + } + + if (empty($_SESSION['view'])) { + $_SESSION['view'] = "default"; + } + if (empty($viewtype) && is_callable('get_input')) + $viewtype = get_input('view'); + if (empty($viewtype)) { + $viewtype = $_SESSION['view']; + } + + ob_start(); + if (!@include($CONFIG->viewpath . "views/{$viewtype}/{$view}.php")) { + $success = false; + if ($viewtype != "default") { + if (@include($CONFIG->viewpath . "views/default/{$view}.php")) { + $success = true; + } + } + if (!$success && $debug == true) { + echo " [This view ({$view}) does not exist] "; + } + } + $content = ob_get_clean(); + + return $content; + + } + + /** + * Library loading and handling */ /** * Recursive function designed to load library files on start + * (NB: this does not include plugins.) * * @param string $directory Full path to the directory to start with * @param string $file_exceptions A list of filenames (with no paths) you don't ever want to include @@ -39,5 +136,81 @@ return $file_list; } + + /** + * Ensures that the installation has all the correct files, that PHP is configured correctly, and so on. + * Leaves appropriate messages in the error register if not. + * + * @return true|false True if everything is ok (or Elgg is fit enough to run); false if not. + */ + function sanitise() { + + if (!file_exists(dirname(dirname(__FILE__)) . "/settings.php")) + register_error(elgg_view("messages/sanitisation/settings")); + + } + + /** + * Registers + */ + + /** + * Message register handling + * If no parameter is given, the function returns the array of messages so far and empties it. + * Otherwise, any message or array of messages is added. + * + * @param string|array $message Optionally, a single message or array of messages to add + * @param string $register By default, "errors". This allows for different types of messages, eg errors. + * @return true|false|array Either the array of messages, or a response regarding whether the message addition was successful + */ + + function system_messages($message = null, $register = "messages") { + + static $messages; + if (!isset($messages)) { + $messages = array(); + } + if (!isset($messages[$register])) { + $messages[$register] = array(); + } + if (!empty($message) && is_array($message)) { + $messages[$register] = array_merge($messages[$register], $message); + return true; + } else if (!empty($message) && is_string($message)) { + $messages[$register][] = $message; + return true; + } else if (!is_string($message) && !is_array($message)) { + if (!empty($register)) { + $returnarray = $messages[$register]; + $messages[$register] = array(); + } else { + $returnarray = $messages; + $messages = array(); + } + return $returnarray; + } + return false; + + } + + /** + * An alias for system_messages($message) to handle standard user information messages + * + * @param string|array $message Message or messages to add + * @return true|false Success response + */ + function system_message($message) { + return system_messages($message, "messages"); + } + + /** + * An alias for system_messages($message) to handle error messages + * + * @param string|array $message Error or errors to add + * @return true|false Success response + */ + function register_error($error) { + return system_messages($error, "errors"); + } ?> \ No newline at end of file diff --git a/engine/start.php b/engine/start.php index 5e82ceae9..864b2b112 100644 --- a/engine/start.php +++ b/engine/start.php @@ -16,9 +16,25 @@ * Load important prerequisites */ - require_once(dirname(__FILE__) . "/lib/elgglib.php"); // Elgg core functions - require_once(dirname(__FILE__) . "/lib/database.php"); // Database connection - include(dirname(__FILE__) . "/settings.php"); // Global settings + if (!@include(dirname(__FILE__) . "/lib/elgglib.php")) { // Main Elgg library + echo "Error in installation: could not load the main Elgg library."; + exit; + } + if (!@include_once(dirname(__FILE__) . "/lib/database.php")) // Database connection + register_error("Could not load the main Elgg database library."); + + /** + * Ensure the installation is correctly formed + */ + + sanitise(); + + /** + * Load the system settings + */ + + if (!@include_once(dirname(__FILE__) . "/settings.php")) // Global settings + register_error("Could not load the settings file."); /** * Load the remaining libraries from /lib/ in alphabetical order, @@ -41,7 +57,12 @@ // Include them foreach($files as $file) { - include($file); + if (!@include_once($file)) + register_error("Could not load {$file}"); + } + + if ($errors = system_messages(null, "errors")) { + // Do something! } ?> \ No newline at end of file -- cgit v1.2.3