action = $settings->defaultaction;
/** The page name requested by the remote client. */
$env->page = "";
/** The filename that the page is stored in. */
$env->page_filename = "";
/** Whether we are looking at a history revision. */
$env->is_history_revision = false;
/** An object holding history revision information for the current request */
$env->history = new stdClass();
/** The revision number requested of the current page */
$env->history->revision_number = -1;
/** The revision data object from the page index for the requested revision */
$env->history->revision_data = false;
/** The user's name if they are logged in. Defaults to `$settings->anonymous_user_name` if the user isn't currently logged in. @var string */
$env->user = $settings->anonymous_user_name;
/** Whether the user is logged in */
$env->is_logged_in = false;
/** Whether the user is an admin (moderator) @todo Refactor this to is_moderator, so that is_admin can be for the server owner. */
$env->is_admin = false;
/** The currently logged in user's data. Please see $settings->users->username if you need to edit this - this is here for convenience :-) */
$env->user_data = new stdClass();
/** The data storage directory. Page filenames should be prefixed with this if you want their content. */
$env->storage_prefix = $settings->data_storage_dir . DIRECTORY_SEPARATOR;
/** Contains performance data statistics for the current request. */
$env->perfdata = new stdClass();
/// Paths ///
/**
* Contains a bunch of useful paths to various important files.
* None of these need to be prefixed with `$env->storage_prefix`.
*/
$paths = new stdClass();
/** The pageindex. Contains extensive information about all pages currently in this wiki. Individual entries for pages may be extended with arbitrary properties. */
$paths->pageindex = "pageindex.json";
/** The inverted index used for searching. Use the `search` class to interact with this - otherwise your brain might explode :P */
$paths->searchindex = "invindex.json";
/** The index that maps ids to page names. Use the `ids` class to interact with it :-) */
$paths->idindex = "idindex.json";
/** The cache of the most recently calculated statistics. */
$paths->statsindex = "statsindex.json";
/** The interwiki index cache */
$paths->interwiki_index = "interwiki_index.json";
/** The cache directory, minus the trailing slash. Contains cached rendered versions of pages. If things don't update, try deleting this folder. */
$paths->cache_directory = "._cache";
// Prepend the storage data directory to all the defined paths.
foreach ($paths as &$path) {
$path = $env->storage_prefix . $path;
}
/** The master settings file @var string */
$paths->settings_file = $settingsFilename;
/** The prefix to add to uploaded files */
$paths->upload_file_prefix = "Files/";
// Create the cache directory if it doesn't exist
if(!is_dir($paths->cache_directory))
mkdir($paths->cache_directory, 0700);
session_start();
// Make sure that the login cookie lasts beyond the end of the user's session
setcookie(session_name(), session_id(), time() + $settings->sessionlifetime, "", "", false, true);
///////// Login System /////////
// Clear expired sessions
if(isset($_SESSION[$settings->sessionprefix . "-expiretime"]) and
$_SESSION[$settings->sessionprefix . "-expiretime"] < time())
{
// Clear the session variables
$_SESSION = [];
session_destroy();
}
if(isset($_SESSION[$settings->sessionprefix . "-user"]) and
isset($_SESSION[$settings->sessionprefix . "-pass"]))
{
// Grab the session variables
$env->user = $_SESSION[$settings->sessionprefix . "-user"];
// The user is logged in
$env->is_logged_in = true;
$env->user_data = $settings->users->{$env->user};
}
// 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 ///////
////////////////////
// APIDoc strings //
////////////////////
/**
* @apiDefine Admin Only the wiki administrator may use this call.
*/
/**
* @apiDefine Moderator Only users loggged with a moderator account may use this call.
*/
/**
* @apiDefine User Only users loggged in may use this call.
*/
/**
* @apiDefine Anonymous Anybody may use this call.
*/
/**
* @apiDefine UserNotLoggedInError
* @apiError UserNotLoggedInError You didn't log in before sending this request.
*/
/**
* @apiDefine UserNotModeratorError
* @apiError UserNotModeratorError You weren't loggged in as a moderator before sending this request.
*/
/**
* @apiDefine PageParameter
* @apiParam {string} page The page to operate on.
*/
////////////////////
///////////////////////////////////////////////////////////////////////////////
////////////////////////////////// Functions //////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
/**
* Get the actual absolute origin of the request sent by the user.
* @package core
* @param array $s The $_SERVER variable contents. Defaults to $_SERVER.
* @param bool $use_forwarded_host Whether to utilise the X-Forwarded-Host header when calculating the actual origin.
* @return string The actual origin of the user's request.
*/
function url_origin( $s = false, $use_forwarded_host = false )
{
if($s === false) $s = $_SERVER;
$ssl = ( ! empty( $s['HTTPS'] ) && $s['HTTPS'] == 'on' );
$sp = strtolower( $s['SERVER_PROTOCOL'] );
$protocol = substr( $sp, 0, strpos( $sp, '/' ) ) . ( ( $ssl ) ? 's' : '' );
$port = $s['SERVER_PORT'];
$port = ( ( ! $ssl && $port=='80' ) || ( $ssl && $port=='443' ) ) ? '' : ':'.$port;
$host = ( $use_forwarded_host && isset( $s['HTTP_X_FORWARDED_HOST'] ) ) ? $s['HTTP_X_FORWARDED_HOST'] : ( isset( $s['HTTP_HOST'] ) ? $s['HTTP_HOST'] : null );
$host = isset( $host ) ? $host : $s['SERVER_NAME'] . $port;
return $protocol . '://' . $host;
}
/**
* Get the full url, as requested by the client.
* @package core
* @see http://stackoverflow.com/a/8891890/1460422 This Stackoverflow answer.
* @param array $s The $_SERVER variable. Defaults to $_SERVER.
* @param bool $use_forwarded_host Whether to take the X-Forwarded-Host header into account.
* @return string The full url, as requested by the client.
*/
function full_url( $s = false, $use_forwarded_host = false )
{
if($s == false) $s = $_SERVER;
return url_origin( $s, $use_forwarded_host ) . $s['REQUEST_URI'];
}
/**
* Converts a filesize into a human-readable string.
* @package core
* @see http://php.net/manual/en/function.filesize.php#106569 The original source
* @author rommel
* @author Edited by Starbeamrainbowlabs
* @param number $bytes The number of bytes to convert.
* @param number $decimals The number of decimal places to preserve.
* @return string A human-readable filesize.
*/
function human_filesize($bytes, $decimals = 2)
{
$sz = ["b", "kb", "mb", "gb", "tb", "pb", "eb", "yb", "zb"];
$factor = floor((strlen($bytes) - 1) / 3);
$result = round($bytes / pow(1024, $factor), $decimals);
return $result . @$sz[$factor];
}
/**
* Calculates the time since a particular timestamp and returns a
* human-readable result.
* @package core
* @see http://goo.gl/zpgLgq The original source. No longer exists, maybe the wayback machine caught it :-(
* @param integer $time The timestamp to convert.
* @return string The time since the given timestamp as
* a human-readable string.
*/
function human_time_since($time)
{
return human_time(time() - $time);
}
/**
* Renders a given number of seconds as something that humans can understand more easily.
* @package core
* @param int $seconds The number of seconds to render.
* @return string The rendered time.
*/
function human_time($seconds)
{
$tokens = array (
31536000 => 'year',
2592000 => 'month',
604800 => 'week',
86400 => 'day',
3600 => 'hour',
60 => 'minute',
1 => 'second'
);
foreach ($tokens as $unit => $text) {
if ($seconds < $unit) continue;
$numberOfUnits = floor($seconds / $unit);
return $numberOfUnits.' '.$text.(($numberOfUnits>1)?'s':'').' ago';
}
}
/**
* A recursive glob() function.
* @package core
* @see http://in.php.net/manual/en/function.glob.php#106595 The original source
* @author Mike
* @param string $pattern The glob pattern to use to find filenames.
* @param integer $flags The glob flags to use when finding filenames.
* @return array An array of the filepaths that match the given glob.
*/
function glob_recursive($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;
}
/**
* Gets the name of the parent page to the specified page.
* @since 0.15
* @package core
* @param string $pagename The child page to get the parent
* page name for.
* @return string|bool
*/
function get_page_parent($pagename) {
if(mb_strpos($pagename, "/") === false)
return false;
return mb_substr($pagename, 0, mb_strrpos($pagename, "/"));
}
/**
* Gets a list of all the sub pages of the current page.
* @package core
* @param object $pageindex The pageindex to use to search.
* @param string $pagename The name of the page to list the sub pages of.
* @return object An object containing all the subpages and their
* respective distances from the given page name in the pageindex tree.
*/
function get_subpages($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;
}
/**
* Makes sure that a subpage's parents exist.
* Note this doesn't check the pagename itself.
* @package core
* @param $pagename The pagename to check.
*/
function check_subpage_parents($pagename)
{
global $pageindex, $paths, $env;
// Save the new pageindex and return if there aren't any more parent pages to check
if(strpos($pagename, "/") === false)
{
file_put_contents($paths->pageindex, json_encode($pageindex, JSON_PRETTY_PRINT));
return;
}
$parent_pagename = substr($pagename, 0, strrpos($pagename, "/"));
$parent_page_filename = "$parent_pagename.md";
if(!file_exists($env->storage_prefix . $parent_page_filename))
{
// This parent page doesn't exist! Create it and add it to the page index.
touch($env->storage_prefix . $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);
}
/**
* Makes a path (or page name) safe.
* A safe path / page name may not contain:
* Forward-slashes at the beginning
* Multiple dots in a row
* Odd characters (e.g. ?%*:|"<>() etc.)
* A safe path may, however, contain unicode characters such as éôà etc.
* @package core
* @param string $string The string to make safe.
* @return string A safe version of the given string.
*/
function makepathsafe($string)
{
// Old restrictive system
//$string = preg_replace("/[^0-9a-zA-Z\_\-\ \/\.]/i", "", $string);
// Remove reserved characters
$string = preg_replace("/[?%*:|\"><()\\[\\]]/i", "", $string);
// Collapse multiple dots into a single dot
$string = preg_replace("/\.+/", ".", $string);
// Don't allow slashes at the beginning
$string = ltrim($string, "\\/");
return $string;
}
/**
* Hides an email address from bots by adding random html entities.
* @todo Make this more clevererer :D
* @package core
* @param string $str The original email address
* @return string The mangled email address.
*/
function hide_email($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;
}
/**
* Checks to see if $haystack starts with $needle.
* @package core
* @param string $haystack The string to search.
* @param string $needle The string to search for at the beginning
* of $haystack.
* @return boolean Whether $needle can be found at the beginning
* of $haystack.
*/
function starts_with($haystack, $needle)
{
$length = strlen($needle);
return (substr($haystack, 0, $length) === $needle);
}
/**
* Case-insensitively finds all occurrences of $needle in $haystack. Handles
* UTF-8 characters correctly.
* @package core
* @see http://www.pontikis.net/tip/?id=16 the source
* @see http://www.php.net/manual/en/function.strpos.php#87061 the source that the above was based on
* @param string $haystack The string to search.
* @param string $needle The string to find.
* @return array|false An array of match indices, or false if
* nothing was found.
*/
function mb_stripos_all($haystack, $needle) {
$s = 0; $i = 0;
while(is_integer($i)) {
$i = mb_stripos($haystack, $needle, $s);
if(is_integer($i)) {
$aStrPos[] = $i;
$s = $i + (function_exists("mb_strlen") ? mb_strlen($needle) : strlen($needle));
}
}
if(isset($aStrPos))
return $aStrPos;
else
return false;
}
/**
* Tests whether a string starts with a specified substring.
* @package core
* @param string $haystack The string to check against.
* @param string $needle The substring to look for.
* @return bool Whether the string starts with the specified substring.
*/
function startsWith($haystack, $needle) {
return $needle === "" || strrpos($haystack, $needle, -strlen($haystack)) !== false;
}
/**
* Tests whether a string ends with a given substring.
* @package core
* @param string $whole The string to test against.
* @param string $end The substring test for.
* @return bool Whether $whole ends in $end.
*/
function endsWith($whole, $end)
{
return (strpos($whole, $end, strlen($whole) - strlen($end)) !== false);
}
/**
* Replaces the first occurrence of $find with $replace.
* @package core
* @param string $find The string to search for.
* @param string $replace The string to replace the search string with.
* @param string $subject The string ot perform the search and replace on.
* @return string The source string after the find and replace has been performed.
*/
function str_replace_once($find, $replace, $subject)
{
$index = strpos($subject, $find);
if($index !== false)
return substr_replace($subject, $replace, $index, strlen($find));
return $subject;
}
/**
* Returns the system's mime type mappings, considering the first extension
* listed to be cacnonical.
* @package core
* @see http://stackoverflow.com/a/1147952/1460422 From this stackoverflow answer
* @author chaos
* @author Edited by Starbeamrainbowlabs
* @return array An array of mime type mappings.
*/
function system_mime_type_extensions()
{
global $settings;
$out = array();
$file = fopen($settings->mime_extension_mappings_location, 'r');
while(($line = fgets($file)) !== false) {
$line = trim(preg_replace('/#.*/', '', $line));
if(!$line)
continue;
$parts = preg_split('/\s+/', $line);
if(count($parts) == 1)
continue;
$type = array_shift($parts);
if(!isset($out[$type]))
$out[$type] = array_shift($parts);
}
fclose($file);
return $out;
}
/**
* Converts a given mime type to it's associated file extension.
* @package core
* @see http://stackoverflow.com/a/1147952/1460422 From this stackoverflow answer
* @author chaos
* @author Edited by Starbeamrainbowlabs
* @param string $type The mime type to convert.
* @return string The extension for the given mime type.
*/
function system_mime_type_extension($type)
{
static $exts;
if(!isset($exts))
$exts = system_mime_type_extensions();
return isset($exts[$type]) ? $exts[$type] : null;
}
/**
* Returns the system MIME type mapping of extensions to MIME types.
* @package core
* @see http://stackoverflow.com/a/1147952/1460422 From this stackoverflow answer
* @author chaos
* @author Edited by Starbeamrainbowlabs
* @return array An array mapping file extensions to their associated mime types.
*/
function system_extension_mime_types()
{
global $settings;
$out = array();
$file = fopen($settings->mime_extension_mappings_location, 'r');
while(($line = fgets($file)) !== false) {
$line = trim(preg_replace('/#.*/', '', $line));
if(!$line)
continue;
$parts = preg_split('/\s+/', $line);
if(count($parts) == 1)
continue;
$type = array_shift($parts);
foreach($parts as $part)
$out[$part] = $type;
}
fclose($file);
return $out;
}
/**
* Converts a given file extension to it's associated mime type.
* @package core
* @see http://stackoverflow.com/a/1147952/1460422 From this stackoverflow answer
* @author chaos
* @author Edited by Starbeamrainbowlabs
* @param string $ext The extension to convert.
* @return string The mime type associated with the given extension.
*/
function system_extension_mime_type($ext) {
static $types;
if(!isset($types))
$types = system_extension_mime_types();
$ext = strtolower($ext);
return isset($types[$ext]) ? $types[$ext] : null;
}
/**
* Generates a stack trace.
* @package core
* @param bool $log_trace Whether to send the stack trace to the error log.
* @param bool $full Whether to output a full description of all the variables involved.
* @return string A string prepresentation of a stack trace.
*/
function stack_trace($log_trace = true, $full = false)
{
$result = "";
$stackTrace = debug_backtrace();
$stackHeight = count($stackTrace);
foreach ($stackTrace as $i => $stackEntry)
{
$result .= "#" . ($stackHeight - $i) . ": ";
$result .= (isset($stackEntry["file"]) ? $stackEntry["file"] : "(unknown file)") . ":" . (isset($stackEntry["line"]) ? $stackEntry["line"] : "(unknown line)") . " - ";
if(isset($stackEntry["function"]))
{
$result .= "(calling " . $stackEntry["function"];
if(isset($stackEntry["args"]) && count($stackEntry["args"]))
{
$result .= ": ";
$result .= implode(", ", array_map($full ? "var_dump_ret" : "var_dump_short", $stackEntry["args"]));
}
}
$result .= ")\n";
}
if($log_trace)
error_log($result);
return $result;
}
/**
* Calls var_dump() and returns the output.
* @package core
* @param mixed $var The thing to pass to var_dump().
* @return string The output captured from var_dump().
*/
function var_dump_ret($var)
{
ob_start();
var_dump($var);
return ob_get_clean();
}
/**
* Calls var_dump(), shortening the output for various types.
* @package core
* @param mixed $var The thing to pass to var_dump().
* @return string A shortened version of the var_dump() output.
*/
function var_dump_short($var)
{
$result = trim(var_dump_ret($var));
if(substr($result, 0, 6) === "object" || substr($result, 0, 5) === "array")
{
$result = substr($result, 0, strpos($result, " ")) . " { ... }";
}
return $result;
}
if (!function_exists('getallheaders')) {
/**
* Polyfill for PHP's native getallheaders() function on platforms that
* don't have it.
* @package core
* @todo Identify which platforms don't have it and whether we still need this
*/
function getallheaders()
{
if (!is_array($_SERVER))
return [];
$headers = array();
foreach ($_SERVER as $name => $value) {
if (substr($name, 0, 5) == 'HTTP_') {
$headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))))] = $value;
}
}
return $headers;
}
}
/**
* Renders a timestamp in HTML.
* @package core
* @param int $timestamp The timestamp to render.
* @return string HTML representing the given timestamp.
*/
function render_timestamp($timestamp)
{
return "";
}
/**
* Renders a page name in HTML.
* @package core
* @param object $rchange The recent change to render as a page name
* @return string HTML representing the name of the given page.
*/
function render_pagename($rchange)
{
global $pageindex;
$pageDisplayName = $rchange->page;
if(isset($pageindex->$pageDisplayName) and !empty($pageindex->$pageDisplayName->redirect))
$pageDisplayName = "$pageDisplayName";
$pageDisplayLink = "$pageDisplayName";
return $pageDisplayName;
}
/**
* Renders an editor's or a group of editors name(s) in HTML.
* @package core
* @param string $editorName The name of the editor to render.
* @return string HTML representing the given editor's name.
*/
function render_editor($editorName)
{
return "✎ $editorName";
}
/**
* Saves the settings file back to peppermint.json.
* @return bool Whether the settings were saved successfully.
*/
function save_settings() {
global $paths, $settings;
return file_put_contents($paths->settings_file, json_encode($settings, JSON_PRETTY_PRINT)) !== false;
}
/**
* Saves the currently logged in user's data back to peppermint.json.
* @package core
* @return bool Whether the user's data was saved successfully. Returns false if the user isn't logged in.
*/
function save_userdata()
{
global $env, $settings, $paths;
if(!$env->is_logged_in)
return false;
$settings->users->{$env->user} = $env->user_data;
return save_settings();
}
/**
* Figures out the path to the user page for a given username.
* Does not check to make sure the user acutally exists.
* @package core
* @param string $username The username to get the path to their user page for.
* @return string The path to the given user's page.
*/
function get_user_pagename($username) {
global $settings;
return "$settings->user_page_prefix/$username";
}
/**
* Extracts a username from a user page path.
* @package core
* @param string $userPagename The suer page path to extract from.
* @return string The name of the user that the user page belongs to.
*/
function extract_user_from_userpage($userPagename) {
global $settings;
$matches = [];
preg_match("/$settings->user_page_prefix\\/([^\\/]+)\\/?/", $userPagename, $matches);
return $matches[1];
}
/**
* Sends a plain text email to a user, replacing {username} with the specified username.
* @package core
* @param string $username The username to send the email to.
* @param string $subject The subject of the email.
* @param string $body The body of the email.
* @return boolean Whether the email was sent successfully or not. Currently, this may fail if the user doesn't have a registered email address.
*/
function email_user($username, $subject, $body)
{
global $version, $settings;
// If the user doesn't have an email address, then we can't email them :P
if(empty($settings->users->{$username}->emailAddress))
return false;
$subject = str_replace("{username}", $username, $subject);
$body = str_replace("{username}", $username, $body);
$headers = [
"content-type" => "text/plain",
"x-mailer" => "$settings->sitename Pepperminty-Wiki/$version PHP/" . phpversion(),
"reply-to" => "$settings->admindetails_name <$settings->admindetails_email>"
];
$compiled_headers = "";
foreach($headers as $header => $value)
$compiled_headers .= "$header: $value\r\n";
return mail($settings->users->{$username}->emailAddress, $subject, $body, $compiled_headers, "-t");
}
/**
* Sends a plain text email to a list of users, replacing {username} with each user's name.
* @package core
* @param string[] $usernames A list of usernames to email.
* @param string $subject The subject of the email.
* @param string $body The body of the email.
* @return integer The number of emails sent successfully.
*/
function email_users($usernames, $subject, $body)
{
$emailsSent = 0;
foreach($usernames as $username)
{
$emailsSent += email_user($username, $subject, $body) ? 1 : 0;
}
return $emailsSent;
}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
////////////////////// Security and Consistency Measures //////////////////////
///////////////////////////////////////////////////////////////////////////////
/*
* Sort out the pageindex. Create it if it doesn't exist, and load + parse it
* if it does.
*/
if(!file_exists($paths->pageindex))
{
$glob_str = $env->storage_prefix . "*.md";
$existingpages = glob_recursive($glob_str);
// Debug statements. Uncomment when debugging the pageindex regenerator.
// var_dump($env->storage_prefix);
// var_dump($glob_str);
// var_dump($existingpages);
$pageindex = new stdClass();
// We use a for loop here because foreach doesn't loop over new values inserted
// while we were looping
for($i = 0; $i < count($existingpages); $i++)
{
$pagefilename = $existingpages[$i];
// Create a new entry
$newentry = new stdClass();
$newentry->filename = substr( // Store the filename, whilst trimming the storage prefix
$pagefilename,
mb_strlen(preg_replace("/^\.\//iu", "", $env->storage_prefix)) // glob_recursive trim the ./ from returned filenames , so we need to as well
);
// Remove the `./` from the beginning if it's still hanging around
if(substr($newentry->filename, 0, 2) == "./")
$newentry->filename = substr($newentry->filename, 2);
$newentry->size = filesize($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 = "unknown"; // Set the editor to "unknown"
// Extract the name of the (sub)page without the ".md"
$pagekey = mb_substr($newentry->filename, 0, -3);
if(file_exists($env->storage_prefix . $pagekey) && // If it exists...
!is_dir($env->storage_prefix . $pagekey)) // ...and isn't a directory
{
// This page (potentially) has an associated file!
// Let's investigate.
// Blindly add the file to the pageindex for now.
// Future We might want to do a security check on the file later on.
// File a bug if you think we should do this.
$newentry->uploadedfile = true; // Yes this page does have an uploaded file associated with it
$newentry->uploadedfilepath = $pagekey; // It's stored here
// Work out what kind of file it really is
$mimechecker = finfo_open(FILEINFO_MIME_TYPE);
$newentry->uploadedfilemime = finfo_file($mimechecker, $env->storage_prefix . $pagekey);
}
// Debug statements. Uncomment when debugging the pageindex regenerator.
// echo("pagekey: ");
// var_dump($pagekey);
// echo("newentry: ");
// var_dump($newentry);
// Subpage parent checker
if(strpos($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, "/"));
$subpage_parent_filename = "$env->storage_prefix$subpage_parent_key.md";
if(array_search($subpage_parent_filename, $existingpages) === false)
{
// Our parent page doesn't actually exist - create it
touch($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 = $newentry;
}
file_put_contents($paths->pageindex, json_encode($pageindex, JSON_PRETTY_PRINT));
unset($existingpages);
}
else
{
$pageindex_read_start = microtime(true);
$pageindex = json_decode(file_get_contents($paths->pageindex));
$env->perfdata->pageindex_decode_time = round((microtime(true) - $pageindex_read_start)*1000, 3);
header("x-pageindex-decode-time: " . $env->perfdata->pageindex_decode_time . "ms");
}
//////////////////////////
///// Page id system /////
//////////////////////////
if(!file_exists($paths->idindex))
file_put_contents($paths->idindex, "{}");
$idindex_decode_start = microtime(true);
$idindex = json_decode(file_get_contents($paths->idindex));
$env->perfdata->idindex_decode_time = round((microtime(true) - $idindex_decode_start)*1000, 3);
/**
* Provides an interface to interact with page ids.
* @package core
*/
class ids
{
/**
* Gets the page id associated with the given page name.
* If it doesn't exist in the id index, it will be added.
* @package core
* @param string $pagename The name of the page to fetch the id for.
* @return integer The id for the specified page name.
*/
public static function getid($pagename)
{
global $idindex;
$pagename_norm = Normalizer::normalize($pagename, Normalizer::FORM_C);
foreach ($idindex as $id => $entry)
{
// We don't need to normalise here because we normralise when assigning ids
if($entry == $pagename_norm)
return $id;
}
// This pagename doesn't have an id - assign it one quick!
return self::assign($pagename);
}
/**
* Gets the page name associated with the given page id.
* Be warned that if the id index is cleared (e.g. when the search index is
* rebuilt from scratch), the id associated with a page name may change!
* @package core
* @param int $id The id to fetch the page name for.
* @return string The page name currently associated with the specified id.
*/
public static function getpagename($id)
{
global $idindex;
if(!isset($idindex->$id))
return false;
else
return $idindex->$id;
}
/**
* Moves a page in the id index from $oldpagename to $newpagename.
* Note that this function doesn't perform any special checks to make sure
* that the destination name doesn't already exist.
* @package core
* @param string $oldpagename The old page name to move.
* @param string $newpagename The new page name to move the old page name to.
*/
public static function movepagename($oldpagename, $newpagename)
{
global $idindex, $paths;
$pageid = self::getid(Normalizer::normalize($oldpagename, Normalizer::FORM_C));
$idindex->$pageid = Normalizer::normalize($newpagename, Normalizer::FORM_C);
file_put_contents($paths->idindex, json_encode($idindex));
}
/**
* Removes the given page name from the id index.
* Note that this function doesn't handle multiple entries with the same
* name. Also note that it may get re-added during a search reindex if the
* page still exists.
* @package core
* @param string $pagename The page name to delete from the id index.
*/
public static function deletepagename($pagename)
{
global $idindex, $paths;
// Get the id of the specified page
$pageid = self::getid($pagename);
// Remove it from the pageindex
unset($idindex->$pageid);
// Save the id index
file_put_contents($paths->idindex, json_encode($idindex));
}
/**
* Clears the id index completely.
* Will break the inverted search index! Make sure you rebuild the search
* index (if the search module is installed, of course) if you want search
* to still work. Of course, note that will re-add all the pages to the id
* index.
* @package core
*/
public static function clear()
{
global $paths, $idindex;
// Delete the old id index
unlink($paths->idindex);
// Create the new id index
file_put_contents($paths->idindex, "{}");
// Reset the in-memory id index
$idindex = new stdClass();
}
/**
* Assigns an id to a pagename. Doesn't check to make sure that
* pagename doesn't already exist in the id index.
* @package core
* @param string $pagename The page name to assign an id to.
* @return integer The id assigned to the specified page name.
*/
protected static function assign($pagename)
{
global $idindex, $paths;
$pagename = Normalizer::normalize($pagename, Normalizer::FORM_C);
$nextid = count(array_keys(get_object_vars($idindex)));
// Increment the generated id until it's unique
while(isset($idindex->nextid))
$nextid++;
// Update the id index
$idindex->$nextid = $pagename;
// Save the id index
file_put_contents($paths->idindex, json_encode($idindex));
return $nextid;
}
}
//////////////////////////
//////////////////////////
// Work around an Opera + Syntaxtic bug where there is no margin at the left
// hand side if there isn't a query string when accessing a .php file.
if(!isset($_GET["action"]) and !isset($_GET["page"]) and basename(parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH)) == "index.php")
{
http_response_code(302);
header("location: " . dirname(parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH)));
exit();
}
// Make sure that the action is set
if(empty($_GET["action"]))
$_GET["action"] = $settings->defaultaction;
// Make sure that the page is set
if(empty($_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();
}
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
//////////////////////////////// HTML fragments ////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
/**
* Renders the HTML page that is sent to the client.
* @package core
*/
class page_renderer
{
/**
* The root HTML template that all pages are built from.
* @var string
* @package core
*/
public static $html_template = "
{title}
{header-html}
{body}
";
/**
* The main content template that is used to render normal wiki pages.
* @var string
* @package core
*/
public static $main_content_template = "{navigation-bar}
{sitename}
{content}
{extra}
{navigation-bar-bottom}
{all-pages-datalist}";
/**
* A specially minified content template that doesn't include the navbar and
* other elements not suitable for printing.
* @var string
* @package core
*/
public static $minimal_content_template = "{content}
";
/**
* An array of items indicating the resources to ask the web server to push
* down to the client with HTTP/2.0 server push.
* Format: [ [type, path], [type, path], .... ]
* @var array[]
*/
protected static $http2_push_items = [];
/**
* A string of extrar HTML that should be included at the bottom of the page .
* @var string
*/
private static $extraHeaderHTML = "";
/**
* The javascript snippets that will be included in the page.
* @var string[]
* @package core
*/
private static $jsSnippets = [];
/**
* The urls of the external javascript files that should be referenced
* by the page.
* @var string[]
* @package core
*/
private static $jsLinks = [];
/**
* The navigation bar divider.
* @package core
* @var string
*/
public static $nav_divider = " | ";
/**
* 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.
* @var array
* @package core
*/
protected static $part_processors = [];
/**
* Registers a function as a part post processor.
* This function's use is more complicated to explain. Pepperminty Wiki
* renders pages with a very simple templating system. For example, in the
* template a page's content is denoted by `{content}`. A function
* registered here will be passed all the components of a page _just_
* before they are dropped into the template. Note that the function you
* pass in here should take a *reference* to the components, as the return
* value of the function passed is discarded.
* @package core
* @param function $function The part preprocessor to register.
*/
public static function register_part_preprocessor($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;
}
/**
* Renders a HTML page with the content specified.
* @package core
* @param string $title The title of the page.
* @param string $content The (HTML) content of the page.
* @param boolean $body_template The HTML content template to use.
* @return string The rendered HTML, ready to send to the client :-)
*/
public static function render($title, $content, $body_template = false)
{
global $settings, $start_time, $version;
if($body_template === false)
$body_template = self::$main_content_template;
if(strlen($settings->logo_url) > 0) {
// A logo url has been specified
$logo_html = "";
switch($settings->logo_position) {
case "left":
$logo_html = "$logo_html $settings->sitename";
break;
case "right":
$logo_html .= " $settings->sitename";
break;
default:
throw new Exception("Invalid logo_position '$settings->logo_position'. Valid values are either \"left\" or \"right\" and are case sensitive.");
}
}
// Push the logo via HTTP/2.0 if possible
if($settings->favicon[0] === "/") self::$http2_push_items[] = ["image", $settings->favicon];
$parts = [
"{body}" => $body_template,
"{sitename}" => $logo_html,
"{version}" => $version,
"{favicon-url}" => $settings->favicon,
"{header-html}" => self::get_header_html(),
"{navigation-bar}" => self::render_navigation_bar($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}" => $settings->admindetails_email,
"{admins-name-list}" => implode(", ", array_map(function($username) { return page_renderer::render_username($username); }, $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,
/// Secondary Parts ///
"{content}" => $content,
"{extra}" => "",
"{title}" => $title,
];
// Pass the parts through the part processors
foreach(self::$part_processors as $function) {
$function($parts);
}
$result = self::$html_template;
$result = str_replace(array_keys($parts), array_values($parts), $result);
$result = str_replace("{generation-time-taken}", round((microtime(true) - $start_time)*1000, 2), $result);
// Send the HTTP/2.0 server push indicators if possible - but not if we're sending a redirect page
if(!headers_sent() && (http_response_code() < 300 || http_response_code() >= 400)) self::send_server_push_indicators();
return $result;
}
/**
* Renders a normal HTML page.
* @package core
* @param string $title The title of the page.
* @param string $content The content of the page.
* @return string The rendered page.
*/
public static function render_main($title, $content) {
return self::render($title, $content, self::$main_content_template);
}
/**
* Renders a minimal HTML page. Useful for printable pages.
* @package core
* @param string $title The title of the page.
* @param string $content The content of the page.
* @return string The rendered page.
*/
public static function render_minimal($title, $content) {
return self::render($title, $content, self::$minimal_content_template);
}
/**
* Sends the currently registered HTTP2 server push items to the client.
* @return integer|FALSE The number of resource hints included in the link: header, or false if server pushing is disabled.
*/
public static function send_server_push_indicators() {
global $settings;
if(!$settings->http2_server_push)
return false;
// Render the preload directives
$link_header_parts = [];
foreach(self::$http2_push_items as $push_item)
$link_header_parts[] = "<{$push_item[1]}>; rel=preload; as={$push_item[0]}";
// Send them in a link: header
if(!empty($link_header_parts))
header("link: " . implode(", ", $link_header_parts));
return count(self::$http2_push_items);
}
/**
* Renders the header HTML.
* @package core
* @return string The rendered HTML that goes in the header.
*/
public static function get_header_html()
{
global $settings;
$result = self::$extraHeaderHTML;
$result .= self::get_css_as_html();
$result .= self::_get_js();
// We can't use module_exists here because sometimes global $modules
// hasn't populated yet when we get called O.o
if(class_exists("search"))
$result .= "\t\t\n";
if(!empty($settings->enable_math_rendering)) {
$result .= "";
}
return $result;
}
/**
* Figures out whether $settings->css is a url, or a string of css.
* A url is something starting with "protocol://" or simply a "/".
* @return boolean True if it's a url - false if we assume it's a string of css.
*/
public static function is_css_url() {
global $settings;
return preg_match("/^[^\/]*\/\/|^\//", $settings->css);
}
/**
* Renders all the CSS as HTML.
* @package core
* @return string The css as HTML, ready to be included in the HTML header.
*/
public static function get_css_as_html()
{
global $settings, $defaultCSS;
if(self::is_css_url()) {
if($settings->css[0] === "/") // Push it if it's a relative resource
self::add_server_push_indicator("style", $settings->css);
return "\n";
} else {
$css = $settings->css == "auto" ? $defaultCSS : $settings->css;
if(!empty($settings->optimize_pages)) {
// CSS Minification ideas by Jean from catswhocode.com
// Link: http://www.catswhocode.com/blog/3-ways-to-compress-css-files-using-php
// Remove comments
$css = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', "", $css);
// Cut down whitespace
$css = preg_replace('/\s+/', " ", $css);
// Remove whitespace after colons and semicolons
$css = str_replace([
" :",
": ",
"; ",
" { ",
" } "
], [
":",
":",
";",
"{",
"}"
], $css);
}
return "\n";
}
}
/**
* Adds the specified url to a javascript file as a reference to the page.
* @package core
* @param string $scriptUrl The url of the javascript file to reference.
*/
public function add_js_link(string $scriptUrl) {
static::$jsLinks[] = $scriptUrl;
}
/**
* Adds a javascript snippet to the page.
* @package core
* @param string $script The snippet of javascript to add.
*/
public function add_js_snippet(string $script) {
static::$jsSnippets[] = $script;
}
/**
* Renders the included javascript header for inclusion in the final
* rendered page.
* @package core
* @return string The rendered javascript ready for inclusion in the page.
*/
private static function _get_js() {
$result = "\n";
foreach(static::$jsSnippets as $snippet)
$result .= "\n";
foreach(static::$jsLinks as $link) {
// Push it via HTTP/2.0 if it's relative
if($link[0] === "/") self::add_server_push_indicator("script", $link);
$result .= "\n";
}
return $result;
}
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* Adds a string of HTML to the header of the rendered page.
* @param string $html The string of HTML to add.
*/
public static function add_header_html($html) {
self::$extraHeaderHTML .= $html;
}
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* Adds a resource to the list of items to indicate that the web server should send via HTTP/2.0 Server Push.
* Note: Only specify static files here, as you might end up with strange (and possibly dangerous) results!
* @param string $type The resource type. See https://fetch.spec.whatwg.org/#concept-request-destination for more information.
* @param string $path The *relative url path* to the resource.
*/
public static function add_server_push_indicator($type, $path) {
self::$http2_push_items[] = [ $type, $path ];
}
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* Renders a navigation bar from an array of links. See
* $settings->nav_links for format information.
* @package core
* @param array $nav_links The links to add to the navigation bar.
* @param array $nav_links_extra The extra nav links to add to
* the "More..." menu.
* @param string $class The class(es) to assign to the rendered
* navigation bar.
*/
public static function render_navigation_bar($nav_links, $nav_links_extra, $class = "") {
global $settings, $env;
$result = "";
return $result;
}
/**
* Renders a username for inclusion in a page.
* @package core
* @param string $name The username to render.
* @return string The username rendered in HTML.
*/
public static function render_username($name) {
global $settings;
$result = "";
$result .= "";
if($settings->avatars_show)
$result .= " ";
if(in_array($name, $settings->admins))
$result .= $settings->admindisplaychar;
$result .= htmlentities($name);
$result .= "";
return $result;
}
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* Renders the datalist for the search box as HTML.
* @package core
* @return string The search box datalist as HTML.
*/
public static function generate_all_pages_datalist() {
global $settings, $pageindex;
$arrayPageIndex = get_object_vars($pageindex);
ksort($arrayPageIndex);
$result = "";
return $result;
}
}
// HTTP/2.0 Server Push static items
foreach($settings->http2_server_push_items as $push_item) {
page_renderer::add_server_push_indicator($push_item[0], $push_item[1]);
}
// Math rendering support
if(!empty($settings->enable_math_rendering))
{
page_renderer::add_js_link("https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-MML-AM_CHTML");
}
// alt+enter support in the search box
page_renderer::add_js_snippet('// Alt + Enter support in the top search box
window.addEventListener("load", function(event) {
document.querySelector("input[type=search]").addEventListener("keyup", function(event) {
// Listen for Alt + Enter
if(event.keyCode == 13 && event.altKey) {
event.stopPropagation();
event.preventDefault();
event.cancelBubble = true;
event.target.form.setAttribute("target", "_blank");
event.target.form.submit();
event.target.form.removeAttribute("target");
return false; // Required by some browsers
}
});
});
');
/// Finish setting up the environment object ///
$env->page = $_GET["page"];
if(isset($_GET["revision"]) and is_numeric($_GET["revision"]))
{
// We have a revision number!
$env->is_history_revision = true;
$env->history->revision_number = intval($_GET["revision"]);
// Make sure that the revision exists for later on
if(!isset($pageindex->{$env->page}->history[$env->history->revision_number]))
{
http_response_code(404);
exit(page_renderer::render_main("404: Revision Not Found - $env->page - $settings->sitename", "
"));
}
$env->history->revision_data = $pageindex->{$env->page}->history[$env->history->revision_number];
}
// Construct the page's filename
$env->page_filename = $env->storage_prefix;
if($env->is_history_revision)
$env->page_filename .= $pageindex->{$env->page}->history[$env->history->revision_number]->filename;
else if(isset($pageindex->{$env->page}))
$env->page_filename .= $pageindex->{$env->page}->filename;
$env->action = strtolower($_GET["action"]);
////////////////////////////////////////////////
//////////////////////////////////////
///// Extra consistency measures /////
//////////////////////////////////////
// CHANGED: The search redirector has now been moved to below the module registration system, as it was causing a warning here
// Redirect the user to the login page if:
// - A login is required to view this wiki
// - The user isn't already requesting the login page
// Note we use $_GET here because $env->action isn't populated at this point
if($settings->require_login_view === true && // If this site requires a login in order to view pages
!$env->is_logged_in && // And the user isn't logged in
!in_array($_GET["action"], [ "login", "checklogin", "opensearch-description", "invindex-rebuild", "stats-update" ])) // And the user isn't trying to login, or get the opensearch description, or access actions that apply their own access rules
{
// Redirect the user to the login page
http_response_code(307);
header("x-login-required: yes");
$url = "?action=login&returnto=" . rawurlencode($_SERVER["REQUEST_URI"]) . "&required=true";
header("location: $url");
exit(page_renderer::render("Login required - $settings->sitename", "
$settings->sitename requires that you login before you are able to access it.
"));
}
//////////////////////////////////////
//////////////////////////////////////
$remote_files = [];
/**
* Registers a request for a remote file to be downloaded before execution. Will block until all files are downloaded.
* Example definition:
* [ "local_filename" => "file.ext", "remote_url": "https://example.com" ]
* @param array $remote_file_def The remote file definition to register.
* @throws Exception Exception Throws an exception if a definition for the requested local file already exists.
*/
function register_remote_file($remote_file_def) {
global $remote_files;
foreach($remote_files as $ex_remote_file_def) {
if($ex_remote_file_def["local_filename"] == $remote_file_def["local_filename"])
throw new Exception("Error: A remote file with the local filename '{$remote_file_def["local_filename"]}' is already registered.");
}
$remote_files[] = $remote_file_def;
}
//////////////////////////
/// Module functions ///
//////////////////////////
// These functions are //
// used by modules to //
// register themselves //
// or new pages. //
//////////////////////////
/** A list of all the currently loaded modules. Not guaranteed to be populated until an action is executed. */
$modules = [];
/**
* Registers a module.
* @package core
* @param array $moduledata The module data to register.
*/
function register_module($moduledata)
{
global $modules;
//echo("registering module\n");
//var_dump($moduledata);
$modules[] = $moduledata;
}
/**
* Checks to see whether a module with the given id exists.
* @package core
* @param string $id The id to search for.
* @return bool Whether a module is currently loaded with the given id.
*/
function module_exists($id)
{
global $modules;
foreach($modules as $module)
{
if($module["id"] == $id)
return true;
}
return false;
}
$actions = new stdClass();
/**
* Registers a new action handler.
* @package core
* @param string $action_name The action to register.
* @param function $func The function to call when the specified
* action is requested.
*/
function add_action($action_name, $func)
{
global $actions;
$actions->$action_name = $func;
}
/**
* Figures out whether a given action is currently registered.
* Only guaranteed to be accurate in inside an existing action function
* @package core
* @param string $action_name The name of the action to search for
* @return boolean Whether an action with the specified name exists.
*/
function has_action($action_name)
{
global $actions;
return !empty($actions->$action_name);
}
$parsers = [
"none" => function() {
throw new Exception("No parser registered!");
}
];
/**
* Registers a new parser.
* @package core
* @param string $name The name of the new parser to register.
* @param function $parser_code The function to register as a new parser.
*/
function add_parser($name, $parser_code)
{
global $parsers;
if(isset($parsers[$name]))
throw new Exception("Can't register parser with name '$name' because a parser with that name already exists.");
$parsers[$name] = $parser_code;
}
/**
* Parses the specified page source using the parser specified in the settings
* into HTML.
* The specified parser may (though it's unlikely) render it to other things.
* @package core
* @param string $source The source to render.
* @return string The source rendered to HTML.
*/
function parse_page_source($source) {
global $settings, $parsers;
if(!isset($parsers[$settings->parser]))
exit(page_renderer::render_main("Parsing error - $settings->sitename", "
Parsing some page source data failed. This is most likely because $settings->sitename has the parser setting set incorrectly. Please contact " . $settings->admindetails_name . ", your $settings->sitename Administrator."));
/* Not needed atm because escaping happens when saving, not when rendering *
if($settings->clean_raw_html)
$source = htmlentities($source, ENT_QUOTES | ENT_HTML5);
*/
return $parsers[$settings->parser]($source);
}
// Function to
$save_preprocessors = [];
/**
* Register a new proprocessor that will be executed just before
* an edit is saved.
* @package core
* @param function $func The function to register.
*/
function register_save_preprocessor($func)
{
global $save_preprocessors;
$save_preprocessors[] = $func;
}
$help_sections = [];
/**
* Adds a new help section to the help page.
* @package core
* @param string $index The string to index the new section under.
* @param string $title The title to display above the section.
* @param string $content The content to display.
*/
function add_help_section($index, $title, $content)
{
global $help_sections;
$help_sections[$index] = [
"title" => $title,
"content" => $content
];
}
if(!empty($settings->enable_math_rendering))
add_help_section("22-mathematical-mxpressions", "Mathematical Expressions", "
$settings->sitename supports rendering of mathematical expressions. Mathematical expressions can be included practically anywhere in your page. Expressions should be written in LaTeX and enclosed in dollar signs like this: $x^2$.
Note that expression parsing is done on the viewer's computer with javascript (specifically MathJax) and not by $settings->sitename directly (also called client side rendering).
");
/** An array of the currently registerd statistic calculators. Not guaranteed to be populated until the requested action function is called. */
$statistic_calculators = [];
/**
* Registers a statistic calculator against the system.
* @package core
* @param array $stat_data The statistic object to register.
*/
function statistic_add($stat_data) {
global $statistic_calculators;
$statistic_calculators[$stat_data["id"]] = $stat_data;
}
/**
* Checks whether a specified statistic has been registered.
* @package core
* @param string $stat_id The id of the statistic to check the existence of.
* @return boolean Whether the specified statistic has been registered.
*/
function has_statistic($stat_id) {
global $statistic_calculators;
return !empty($statistic_calculators[$stat_id]);
}
//////////////////////////////////////////////////////////////////
// %next_module% //
//////////////////////////////////////////////////////////////////
// Execute each module's code
foreach($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!
"));
}
// Download all the requested remote files
ini_set("user_agent", "$settings->sitename (Pepperminty-Wiki-Downloader; PHP/" . phpversion() . "; +https://github.com/sbrl/Pepperminty-Wiki/) Pepperminty-Wiki/$version");
foreach($remote_files as $remote_file_def) {
if(file_exists($remote_file_def["local_filename"]) && filesize($remote_file_def["local_filename"]) > 0)
continue;
error_log("[ Pepperminty-Wiki/$settings->sitename ] Downloading {$remote_file_def["local_filename"]} from {$remote_file_def["remote_url"]}");
file_put_contents($remote_file_def["local_filename"], fopen($remote_file_def["remote_url"], "rb"));
}
//////////////////////////////////
/// Final Consistency Measures ///
//////////////////////////////////
if(!isset($pageindex->{$env->page}) && isset($pageindex->{ucwords($env->page)})) {
http_response_code(307);
header("location: ?page=" . ucwords($env->page));
header("content-type: text/plain");
exit("$env->page doesn't exist on $settings->sitename, but " . ucwords($env->page) . " does. You should be redirected there automatically.");
}
// Redirect to the search page if there isn't a page with the requested name
if(!isset($pageindex->{$env->page}) and isset($_GET["search-redirect"]))
{
http_response_code(307);
$url = "?action=search&query=" . rawurlencode($env->page);
header("location: $url");
exit(page_renderer::render_minimal("Non existent page - $settings->sitename", "
There isn't a page on $settings->sitename with that name. However, you could search for this page name in other pages.