action = $settings->defaultaction;
$env->page = "";
$env->user = "Anonymous";
$env->is_logged_in = false;
$env->is_admin = false;
session_start();
///////// Login System /////////
// Clear expired sessions
if(isset($_SESSION["$settings->sessionprefix-expiretime"]) and
$_SESSION["$settings->sessionprefix-expiretime"] < time())
{
// Clear the session variables
$_SESSION = [];
session_destroy();
$env->is_logged_in = false;
$env->user = "Anonymous";
}
if(!isset($_SESSION[$settings->sessionprefix . "-user"]) and
!isset($_SESSION[$settings->sessionprefix . "-pass"]))
{
// The user is not logged in
$env->is_logged_in = false;
}
else
{
$env->user = $_SESSION[$settings->sessionprefix . "-user"];
$env->pass = $_SESSION[$settings->sessionprefix . "-pass"];
if($settings->users[$env->user] == $env->pass)
{
// The user is logged in
$env->is_logged_in = true;
}
else
{
// The user's login details are invalid (what is going on here?)
// Unset the session variables, treat them as an anonymous user,
// and get out of here
$env->is_logged_in = false;
$env->user = "Anonymous";
$env->pass = "";
// Clear the session data
$_SESSION = []; //delete all the variables
session_destroy(); //destroy the session
}
}
//check to see if the currently logged in user is an admin
$env->is_admin = false;
if($env->is_logged_in)
{
foreach($settings->admins as $admin_username)
{
if($admin_username == $env->user)
{
$env->is_admin = true;
break;
}
}
}
/////// Login System End ///////
///////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////// Functions ////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/*
* @summary Converts a filesize into a human-readable string.
* @source http://php.net/manual/en/function.filesize.php#106569
* @editor Starbeamrainbowlabs
*
* @param $bytes - The number of bytes to convert.
* @param $decimals - The number of decimal places to preserve.
*/
function human_filesize($bytes, $decimals = 2)
{
$sz = ["B", "KB", "MB", "GB", "TB", "PB", "EB", "YB", "ZB"];
$factor = floor((strlen($bytes) - 1) / 3);
return sprintf("%.{$decimals}f", $bytes / pow(1024, $factor)) . @$sz[$factor];
}
/*
* @summary Calculates the time sincce a particular timestamp and returns a
* human-readable result.
* @source http://snippets.pro/snippet/137-php-convert-the-timestamp-to-human-readable-format/
*
* @param $time - The timestamp to convert.
*
* @returns {string} - The time since the given timestamp pas a human-readable string.
*/
function human_time_since($time)
{
$timediff = time() - $time;
$tokens = array (
31536000 => 'year',
2592000 => 'month',
604800 => 'week',
86400 => 'day',
3600 => 'hour',
60 => 'minute',
1 => 'second'
);
foreach ($tokens as $unit => $text) {
if ($timediff < $unit) continue;
$numberOfUnits = floor($timediff / $unit);
return $numberOfUnits.' '.$text.(($numberOfUnits>1)?'s':'').' ago';
}
}
/*
* @summary A recursive glob() function.
*
* @param $pattern - The glob pattern to use to find filenames.
* @param $flags - The glob flags to use when finding filenames.
*
* @returns {array} - An array of the filepaths that match the given glob.
*/
// From http://in.php.net/manual/en/function.glob.php#106595
function glob_recursive($pattern, $flags = 0)
{
$files = glob($pattern, $flags);
foreach (glob(dirname($pattern).'/*', GLOB_ONLYDIR|GLOB_NOSORT) as $dir)
{
$prefix = "$dir/";
// Remove the "./" from the beginning if it exists
if(substr($prefix, 0, 2) == "./") $prefix = substr($prefix, 2);
$files = array_merge($files, glob_recursive($prefix . basename($pattern), $flags));
}
return $files;
}
/*
* @summary Gets a list of all the sub pagess of the current page.
*
* @param $pageindex - The pageindex to use to search.
* @param $pagename - The name of the page to list the sub pages of.
*
* @returns An objectt containing all the subpages, and their respective distances from the given page name in the pageindex tree.
*/
function get_subpages($pageindex, $pagename)
{
$pagenames = get_object_vars($pageindex);
$result = new stdClass();
$stem = "$pagename/";
$stem_length = strlen($stem);
foreach($pagenames as $entry => $value)
{
if(substr($entry, 0, $stem_length) == $stem)
{
// We found a subpage
// Extract the subpage's key relative to the page that we are searching for
$subpage_relative_key = substr($entry, $stem_length, -3);
// Calculate how many times removed the current subpage is from the current page. 0 = direct descendant.
$times_removed = substr_count($subpage_relative_key, "/");
// Store the name of the subpage we found
$result->$entry = $times_removed;
}
}
unset($pagenames);
return $result;
}
/*
* @summary Makes sure that a subpage's parents exist. Note this doesn't check the pagename itself.
*
* @param The pagename to check.
*
*/
function check_subpage_parents($pagename)
{
global $pageindex;
// Save the new pageindex and return if there aren't any more parent pages to check
if(strpos($pagename, "/") === false)
{
file_put_contents("./pageindex.json", json_encode($pageindex, JSON_PRETTY_PRINT));
return;
}
$parent_pagename = substr($pagename, 0, strrpos($pagename, "/"));
$parent_page_filename = "$parent_pagename.md";
if(!file_exists($parent_page_filename))
{
// This parent page doesn't exist! Create it and add it to the page index.
touch($parent_page_filename, 0);
$newentry = new stdClass();
$newentry->filename = $parent_page_filename;
$newentry->size = 0;
$newentry->lastmodified = 0;
$newentry->lasteditor = "none";
$pageindex->$parent_pagename = $newentry;
}
check_subpage_parents($parent_pagename);
}
/*
* @summary makes a path safe
*
* @details paths may only contain alphanumeric characters, spaces, underscores, and dashes
*/
function makepathsafe($string)
{
return preg_replace("/[^0-9a-zA-Z\_\-\ \/]/i", "", $string);
}
/*
* @summary Hides an email address from bots by adding random html entities.
*
* @returns The mangled email address.
*/
function hide_email($str)
{
$hidden_email = "";
for($i = 0; $i < strlen($str); $i++)
{
if($str[$i] == "@")
{
$hidden_email .= "&#" . ord("@") . ";";
continue;
}
if(rand(0, 1) == 0)
$hidden_email .= $str[$i];
else
$hidden_email .= "&#" . ord($str[$i]) . ";";
}
return $hidden_email;
}
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////// Security and Consistency Measures ////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/*
* Sort out the pageindex. We create it if it doesn't exist, and load and parse
* it if it does.
*/
if(!file_exists("./pageindex.json"))
{
$existingpages = glob_recursive("*.md");
$pageindex = new stdClass();
// We use a for loop here because foreach doesn't loop over new values inserted
// while we were looping
for($i = 0; $i < count($existingpages); $i++)
{
$pagefilename = $existingpages[$i];
// Create a new entry
$newentry = new stdClass();
$newentry->filename = utf8_encode($pagefilename); // Store the filename
$newentry->size = filesize($pagefilename); // Store the page size
$newentry->lastmodified = filemtime($pagefilename); // Store the date last modified
// Todo find a way to keep the last editor independent of the page index
$newentry->lasteditor = utf8_encode("unknown"); // Set the editor to "unknown"
// Extract the name of the (sub)page without the ".md"
$pagekey = utf8_encode(substr($pagefilename, 0, -3));
// Subpage parent checker
if(strpos($pagekey, "/") !== false)
{
// We have a sub page people
// Work out what our direct parent's key must be in order to check to
// make sure that it actually exists. If it doesn't, then we need to
// create it.
$subpage_parent_key = substr($pagekey, 0, strrpos($pagekey, "/"));
$subpage_parent_filename = "$subpage_parent_key.md";
if(array_search($subpage_parent_filename, $existingpages) === false)
{
// Our parent page doesn't acutally exist - create it
touch($subpage_parent_filename, 0);
// Furthermore, we should add this page to the list of existing pages
// in order for it to be indexed
$existingpages[] = $subpage_parent_filename;
}
}
// Store the new entry in the new page index
$pageindex->$pagekey = $newentry;
}
file_put_contents("./pageindex.json", json_encode($pageindex, JSON_PRETTY_PRINT));
unset($existingpages);
}
else
{
$pageindex = json_decode(file_get_contents("./pageindex.json"));
}
// Work around an Opera + Syntaxtic bug where there is no margin at the left hand side if there isn't a query string when accessing a .php file
if(!isset($_GET["action"]) and !isset($_GET["page"]))
{
http_response_code(302);
header("location: index.php?action=$settings->defaultaction&page=$settings->defaultpage");
exit();
}
// Make sure that the action is set
if(!isset($_GET["action"]))
$_GET["action"] = $settings->defaultaction;
// Make sure that the page is set
if(!isset($_GET["page"]) or strlen($_GET["page"]) === 0)
$_GET["page"] = $settings->defaultpage;
// Redirect the user to the safe version of the path if they entered an unsafe character
if(makepathsafe($_GET["page"]) !== $_GET["page"])
{
http_response_code(301);
header("location: index.php?action=" . rawurlencode($_GET["action"]) . "&page=" . makepathsafe($_GET["page"]));
header("x-requested-page: " . $_GET["page"]);
header("x-actual-page: " . makepathsafe($_GET["page"]));
exit();
}
$env->page = $_GET["page"];
$env->action = strtolower($_GET["action"]);
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////// HTML fragments //////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////
class page_renderer
{
public static $html_template = "
{title}
{header-html}
{body}
";
public static $main_content_template = "{navigation-bar}
{sitename}
{content}
{navigation-bar-bottom}
{all-pages-datalist}";
public static $minimal_content_template = "{content}
";
// An array of functions that have been registered to process the
// find / replace array before the page is rendered. Note that the function
// should take a *reference* to an array as its only argument.
protected static $part_processors = [];
// Registers a function as a part post processor.
public static function register_part_preprocessor($function)
{
global $settings;
// Make sure that the function we are about to register is valid
if(!is_callable($function))
{
http_response_code(500);
$admin_name = $settings->admindetails["name"];
$admin_email = hide_email($settings->admindetails["email"]);
exit(page_renderer::render("$settings->sitename - Module Error", "
$settings->sitename has got a misbehaving module installed that tried to register an invalid HTML handler with the page renderer. Please contact $settings->sitename's administrator $admin_name at $admin_email."));
}
self::$part_processors[] = $function;
return true;
}
public static function render($title, $content, $body_template = false)
{
global $settings, $start_time;
if($body_template === false)
$body_template = self::$main_content_template;
$parts = [
"{body}" => $body_template,
"{sitename}" => $settings->sitename,
"{favicon-url}" => $settings->favicon,
"{header-html}" => self::get_css_as_html(),
"{navigation-bar}" => self::render_navigation_bar($settings->nav_links, $settings->nav_links_extra, "top"),
"{navigation-bar-bottom}" => self::render_navigation_bar($settings->nav_links_bottom, [], "bottom"),
"{admin-details-name}" => $settings->admindetails["name"],
"{admin-details-email}" => $settings->admindetails["email"],
"{admins-name-list}" => implode(", ", $settings->admins),
"{generation-date}" => date("l jS \of F Y \a\\t h:ia T"),
"{all-pages-datalist}" => self::generate_all_pages_datalist(),
"{footer-message}" => $settings->footer_message
];
// Pass the parts through the part processors
foreach(self::$part_processors as $function)
{
$function($parts);
}
$result = self::$html_template;
$result = str_replace(array_keys($parts), array_values($parts), $result);
$result = str_replace([
"{title}",
"{content}"
], [
$title,
$content
], $result);
$result = str_replace("{generation-time-taken}", microtime(true) - $start_time, $result);
return $result;
}
public static function render_main($title, $content)
{
return self::render($title, $content, self::$main_content_template);
}
public static function render_minimal($title, $content)
{
return self::render($title, $content, self::$minimal_content_template);
}
public static function get_css_as_html()
{
global $settings;
if(preg_match("/^[^\/]*\/\/|^\//", $settings->css))
return "";
else
return "";
}
public static $nav_divider = " | ";
/*
* @summary Function to render a navigation bar from an array of links. See
* $settings->nav_links for format information.
*
* @param $nav_links - The links to add to the navigation bar.
* @param $nav_links_extra - The extra nav links to add to the "More..."
* menu.
*/
public static function render_navigation_bar($nav_links, $nav_links_extra, $class = "")
{
global $settings, $env;
$result = "";
return $result;
}
public static function render_username($name)
{
global $settings;
$result = "";
if(in_array($name, $settings->admins))
$result .= $settings->admindisplaychar;
$result .= $name;
return $result;
}
public static function generate_all_pages_datalist()
{
global $pageindex;
$result = "";
return $result;
}
}
//////////////////////////
/// Module functions ///
//////////////////////////
// These functions are //
// used by modules to //
// register themselves //
// or new pages. //
//////////////////////////
$modules = []; // List that contains all the loaded modules
// Function to register a module
function register_module($moduledata)
{
global $modules;
//echo("registering module\n");
//var_dump($moduledata);
$modules[] = $moduledata;
}
// Function to register an action handler
$actions = new stdClass();
function add_action($action_name, $func)
{
global $actions;
//echo("adding $action_name\n");
$actions->$action_name = $func;
}
// Function to register a new parser. If multiple parsers are registered then
// only the last parser registered will actually be used.
$parse_page_source = function() {
throw new Exception("No parser registered!");
};
function add_parser($parser_code)
{
global $parse_page_source;
$parse_page_source = $parser_code;
}
//////////////////////////////////////////////////////////////////
// %next_module% //
// Execute each module's code
foreach($modules as $moduledata)
{
$moduledata["code"]();
}
// Make sure that the credits page exists
if(!isset($actions->credits))
{
exit(page_renderer::render_main("Error - $settings->$sitename", "
No credits page detected. The credits page is a required module!