diff -r 902822492a68 -r fe660c52c48f includes/pageprocess.php~ --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/includes/pageprocess.php~ Wed Jun 13 16:07:17 2007 -0400 @@ -0,0 +1,455 @@ + + */ + +class PageProcessor +{ + + /** + * Page ID and namespace of the page handled by this instance + * @var string + */ + + var $page_id; + var $namespace; + + /** + * Tracks if the page we're loading exists in the database or not. + * @var bool + */ + + var $page_exists = false; + + /** + * Permissions! + * @var object + */ + + var $perms = null; + + /** + * Switch to track if redirects are allowed. Defaults to true. + * @var bool + */ + + var $allow_redir = true; + + /** + * If this is set to true, this will call the header and footer funcs on $template when render() is called. + * @var bool + */ + + var $send_headers = false; + + /** + * Cache the fetched text so we don't fetch it from the DB twice. + * @var string + */ + + var $text_cache = ''; + + /** + * Debugging information to track errors. You can set enable to false to disable sending debug information. + * @var array + */ + + var $debug = array( + 'enable' => true, + 'works' => false + ); + + /** + * Constructor. + * @param string The page ID (urlname) of the page + * @param string The namespace of the page + */ + + function __construct( $page_id, $namespace ) + { + global $db, $session, $paths, $template, $plugins; // Common objects + + // See if we can get some debug info + if ( function_exists('debug_backtrace') && $this->debug['enable'] ) + { + $this->debug['works'] = true; + $this->debug['backtrace'] = enano_debug_print_backtrace(true); + } + + // First things first - check page existence and permissions + + if ( !isset($paths->nslist[$namespace]) ) + { + $this->send_error('The namespace "' . htmlspecialchars($namespace) . '" does not exist.'); + } + + $this->_setup( $page_id, $namespace ); + + } + + /** + * The main method to send the page content. Also responsible for checking permissions. + */ + + function send() + { + global $db, $session, $paths, $template, $plugins; // Common objects + if ( !$this->perms->get_permissions('read') ) + { + $this->err_access_denied(); + return false; + } + if ( $this->namespace == 'Special' || $this->namespace == 'Admin' ) + { + if ( !$this->page_exists ) + { + redirect( makeUrl(getConfig('main_page')), 'Can\'t find special page', 'The special or administration page you requested does not exist. You will now be transferred to the main page.', 2 ); + } + $func_name = "page_{$this->namespace}_{$this->page_id}"; + if ( function_exists($func_name) ) + { + return @call_user_func($func_name); + } + else + { + $title = 'Page backend not found'; + $message = "The administration page you are looking for was properly registered using the page API, but the backend function + ($fname) was not found. If this is a plugin page, then this is almost certainly a bug with the plugin."; + + if ( $this->send_headers ) + { + $template->tpl_strings['PAGE_NAME'] = $title; + $template->header(); + echo "

$message

"; + $template->footer(); + } + else + { + echo "

$title

+

$message

"; + } + return false; + } + } + else if ( in_array($this->namespace, array('Article', 'User', 'Project', 'Help', 'File', 'Category')) && $this->page_exists ) + { + // Send as regular page + $text = $this->fetch_text(); + if ( $text == 'err_no_text_rows' ) + { + $this->err_no_rows(); + return false; + } + else + { + $this->render(); + } + } + else if ( ( $this->namespace == 'Template' || $this->namespace == 'System' ) && $this->page_exists ) + { + $this->header(); + + $text = $this->fetch_text(); + $text = preg_replace('/(.*?)<\/noinclude>/is', '\\1', $text); + $text = preg_replace('/(.*?)<\/nodisplay>/is', '', $text); + + $text = RenderMan::render( $text ); + + echo $text; + + $this->footer(); + + } + else if ( !$this->page_exists ) + { + // Perhaps this is hooked? + ob_start(); + + $code = $plugins->setHook('page_not_found'); + foreach ( $code as $cmd ) + { + eval($cmd); + } + + $ob = ob_get_contents(); + + if ( empty($ob) ) + { + $this->err_page_not_existent(); + } + + } + + } + + /** + * Sets internal variables. + * @access private + */ + + function _setup($page_id, $namespace) + { + global $db, $session, $paths, $template, $plugins; // Common objects + + $page_id_cleaned = sanitize_page_id($page_id); + + $this->page_id = $page_id_cleaned; + $this->namespace = $namespace; + + $this->perms = $session->fetch_page_acl( $page_id, $namespace ); + + // Exception for Admin: pages + if ( $this->namespace == 'Admin' ) + { + $fname = "page_Admin_{$this->page_id}"; + } + + // Does the page "exist"? + if ( $paths->cpage['urlname_nons'] == $page_id && $paths->namespace == $namespace && !$paths->page_exists && ( $this->namespace == 'Admin' && !function_exists($fname) ) ) + { + $this->page_exists = false; + } + else if ( !isset( $paths->pages[ $paths->nslist[$namespace] . $page_id ] ) && ( $this->namespace == 'Admin' && !function_exists($fname) ) ) + { + $this->page_exists = false; + } + else + { + $this->page_exists = true; + } + } + + /** + * Renders it all in one go, and echoes it out. This assumes that the text is in the DB. + * @access private + */ + + function render() + { + $text = $this->fetch_text(); + + $this->header(); + echo RenderMan::render($text); + $this->footer(); + } + + /** + * Sends the page header, dependent on, of course, whether we're supposed to. + */ + + function header() + { + global $db, $session, $paths, $template, $plugins; // Common objects + if ( $this->send_headers ) + $template->header(); + } + + /** + * Sends the page footer, dependent on, of course, whether we're supposed to. + */ + + function footer() + { + global $db, $session, $paths, $template, $plugins; // Common objects + if ( $this->send_headers ) + $template->footer(); + } + + /** + * Fetches the raw, unfiltered page text. + * @access public + */ + + function fetch_text() + { + global $db, $session, $paths, $template, $plugins; // Common objects + + if ( !empty($this->text_cache) ) + { + return $this->text_cache; + } + + $q = $db->sql_query('SELECT page_text, char_tag FROM '.table_prefix.'page_text WHERE page_id=\'' . $this->page_id . '\' AND namespace=\'' . $this->namespace . '\';'); + if ( !$q ) + { + $this->send_error('Error during SQL query.', true); + } + if ( $db->numrows() < 1 ) + { + $this->page_exists = false; + return 'err_no_text_rows'; + } + + $row = $db->fetchrow(); + $db->free_result(); + + if ( !empty($row['char_tag']) ) + { + // This page text entry uses the old text-escaping format + $from = array( + "{APOS:{$row['char_tag']}}", + "{QUOT:{$row['char_tag']}}", + "{SLASH:{$row['char_tag']}}" + ); + $to = array("'", '"', '\\'); + $row['page_text'] = str_replace($from, $to, $row['page_text']); + } + + $this->text_cache = $row['page_text']; + + return $row['page_text']; + + } + + /** + * Send the error message to the user that the access to this page is denied. + * @access private + */ + + function err_access_denied() + { + global $db, $session, $paths, $template, $plugins; // Common objects + + $ob = ''; + $template->tpl_strings['PAGE_NAME'] = 'Access denied'; + + if ( $this->send_headers ) + { + $ob .= $template->getHeader(); + } + + $ob .= '
Access to this page is denied.
This may be because you are not logged in or you have not met certain criteria for viewing this page.
'; + + if ( $this->send_headers ) + { + $ob .= $template->getFooter(); + } + echo $ob; + } + + /** + * Send the error message to the user complaining that there weren't any rows. + * @access private + */ + + function err_no_rows() + { + global $db, $session, $paths, $template, $plugins; // Common objects + + $title = 'No text rows'; + $message = 'While the page\'s existence was verified, there were no rows in the database that matched the query for the text. This may indicate a bug with the software; ask the webmaster for more information.'; + if ( $this->send_headers ) + { + $template->tpl_strings['PAGE_NAME'] = $title; + $template->header(); + echo "

$message

"; + $template->footer(); + } + else + { + echo "

$title

+

$message

"; + } + } + + /** + * Tell the user the page doesn't exist, and present them with their options. + * @access private + */ + + function err_page_not_existent() + { + global $db, $session, $paths, $template, $plugins; // Common objects + + $this->header(); + header('HTTP/1.1 404 Not Found'); + echo '

There is no page with this title yet.

+

You have requested a page that doesn\'t exist yet.'; + if ( $session->get_permissions('create_page') ) + { + echo ' You can create this page, or return to the homepage.'; + } + else + { + echo ' Return to the homepage.

'; + } + if ( $session->get_permissions('history_rollback') ) + { + $e = $db->sql_query('SELECT * FROM ' . table_prefix . 'logs WHERE action=\'delete\' AND page_id=\'' . $this->page_id . '\' AND namespace=\'' . $this->namespace . '\' ORDER BY time_id DESC;'); + if ( !$e ) + { + $db->_die('The deletion log could not be selected.'); + } + if ( $db->numrows() > 0 ) + { + $r = $db->fetchrow(); + echo '

This page also appears to have some log entries in the database - it seems that it was deleted on ' . $r['date_string'] . '. You can probably roll back the deletion.

'; + } + $db->free_result(); + } + echo '

+ HTTP Error: 404 Not Found +

'; + $this->footer(); + } + + /** + * PHP 4 constructor. + * @see PageProcessor::__construct() + */ + + function PageProcessor( $page_id, $namespace ) + { + $this->__construct($page_id, $namespace); + } + + /** + * Send an error message and die + * @var string Error message + * @var bool If true, send DBAL's debugging information as well + */ + + function send_error($message, $sql = false) + { + global $db, $session, $paths, $template, $plugins; // Common objects + + $content = "

$message

"; + $template->tpl_strings['PAGE_NAME'] = 'General error in page fetcher'; + + if ( $this->debug['works'] ) + { + $content .= $this->debug['backtrace']; + } + + header('HTTP/1.1 500 Internal Server Error'); + + $template->header(); + echo $content; + $template->footer(); + + $db->close(); + + exit; + + } + +} // class PageProcessor + +?>