mirror of
https://github.com/sbrl/Pepperminty-Wiki.git
synced 2024-12-26 15:05:01 +00:00
720 lines
23 KiB
PHP
720 lines
23 KiB
PHP
<?php
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$start_time = time(true);
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{settings}
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///////////////////////////////////////////////////////////////////////////////////////////////
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/////////////// Do not edit below this line unless you know what you are doing! ///////////////
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///////////////////////////////////////////////////////////////////////////////////////////////
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$version = "{version}";
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$env = new stdClass();
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$env->action = $settings->defaultaction;
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$env->page = "";
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$env->user = "Anonymous";
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$env->is_logged_in = false;
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$env->is_admin = false;
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session_start();
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///////// Login System /////////
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// Clear expired sessions
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if(isset($_SESSION["$settings->sessionprefix-expiretime"]) and
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$_SESSION["$settings->sessionprefix-expiretime"] < time())
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{
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// Clear the session variables
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$_SESSION = [];
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session_destroy();
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$env->is_logged_in = false;
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$env->user = "Anonymous";
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}
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if(!isset($_SESSION[$settings->sessionprefix . "-user"]) and
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!isset($_SESSION[$settings->sessionprefix . "-pass"]))
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{
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// The user is not logged in
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$env->is_logged_in = false;
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}
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else
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{
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$env->user = $_SESSION[$settings->sessionprefix . "-user"];
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$env->pass = $_SESSION[$settings->sessionprefix . "-pass"];
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if($settings->users[$env->user] == $env->pass)
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{
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// The user is logged in
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$env->is_logged_in = true;
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}
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else
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{
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// The user's login details are invalid (what is going on here?)
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// Unset the session variables, treat them as an anonymous user,
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// and get out of here
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$env->is_logged_in = false;
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$env->user = "Anonymous";
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$env->pass = "";
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// Clear the session data
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$_SESSION = []; //delete all the variables
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session_destroy(); //destroy the session
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}
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}
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//check to see if the currently logged in user is an admin
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$env->is_admin = false;
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if($env->is_logged_in)
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{
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foreach($settings->admins as $admin_username)
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{
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if($admin_username == $env->user)
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{
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$env->is_admin = true;
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break;
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}
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}
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}
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/////// Login System End ///////
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///////////////////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////// Functions ////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////////////////
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/*
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* @summary Converts a filesize into a human-readable string.
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* @source http://php.net/manual/en/function.filesize.php#106569
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* @editor Starbeamrainbowlabs
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*
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* @param $bytes - The number of bytes to convert.
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* @param $decimals - The number of decimal places to preserve.
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*/
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function human_filesize($bytes, $decimals = 2)
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{
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$sz = ["B", "KB", "MB", "GB", "TB", "PB", "EB", "YB", "ZB"];
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$factor = floor((strlen($bytes) - 1) / 3);
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return sprintf("%.{$decimals}f", $bytes / pow(1024, $factor)) . @$sz[$factor];
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}
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/*
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* @summary Calculates the time sincce a particular timestamp and returns a
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* human-readable result.
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* @source http://snippets.pro/snippet/137-php-convert-the-timestamp-to-human-readable-format/
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*
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* @param $time - The timestamp to convert.
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*
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* @returns {string} - The time since the given timestamp pas a human-readable string.
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*/
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function human_time_since($time)
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{
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$timediff = time() - $time;
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$tokens = array (
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31536000 => 'year',
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2592000 => 'month',
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604800 => 'week',
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86400 => 'day',
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3600 => 'hour',
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60 => 'minute',
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1 => 'second'
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);
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foreach ($tokens as $unit => $text) {
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if ($timediff < $unit) continue;
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$numberOfUnits = floor($timediff / $unit);
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return $numberOfUnits.' '.$text.(($numberOfUnits>1)?'s':'').' ago';
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}
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}
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/*
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* @summary A recursive glob() function.
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*
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* @param $pattern - The glob pattern to use to find filenames.
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* @param $flags - The glob flags to use when finding filenames.
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*
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* @returns {array} - An array of the filepaths that match the given glob.
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*/
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// From http://in.php.net/manual/en/function.glob.php#106595
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function glob_recursive($pattern, $flags = 0)
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{
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$files = glob($pattern, $flags);
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foreach (glob(dirname($pattern).'/*', GLOB_ONLYDIR|GLOB_NOSORT) as $dir)
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{
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$prefix = "$dir/";
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// Remove the "./" from the beginning if it exists
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if(substr($prefix, 0, 2) == "./") $prefix = substr($prefix, 2);
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$files = array_merge($files, glob_recursive($prefix . basename($pattern), $flags));
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}
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return $files;
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}
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/*
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* @summary Gets a list of all the sub pages of the current page.
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*
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* @param $pageindex - The pageindex to use to search.
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* @param $pagename - The name of the page to list the sub pages of.
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*
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* @returns An objectt containing all the subpages, and their respective distances from the given page name in the pageindex tree.
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*/
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function get_subpages($pageindex, $pagename)
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{
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$pagenames = get_object_vars($pageindex);
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$result = new stdClass();
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$stem = "$pagename/";
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$stem_length = strlen($stem);
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foreach($pagenames as $entry => $value)
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{
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if(substr($entry, 0, $stem_length) == $stem)
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{
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// We found a subpage
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// Extract the subpage's key relative to the page that we are searching for
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$subpage_relative_key = substr($entry, $stem_length, -3);
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// Calculate how many times removed the current subpage is from the current page. 0 = direct descendant.
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$times_removed = substr_count($subpage_relative_key, "/");
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// Store the name of the subpage we found
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$result->$entry = $times_removed;
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}
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}
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unset($pagenames);
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return $result;
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}
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/*
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* @summary Makes sure that a subpage's parents exist. Note this doesn't check the pagename itself.
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*
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* @param The pagename to check.
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*
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*/
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function check_subpage_parents($pagename)
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{
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global $pageindex;
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// Save the new pageindex and return if there aren't any more parent pages to check
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if(strpos($pagename, "/") === false)
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{
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file_put_contents("./pageindex.json", json_encode($pageindex, JSON_PRETTY_PRINT));
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return;
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}
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$parent_pagename = substr($pagename, 0, strrpos($pagename, "/"));
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$parent_page_filename = "$parent_pagename.md";
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if(!file_exists($parent_page_filename))
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{
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// This parent page doesn't exist! Create it and add it to the page index.
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touch($parent_page_filename, 0);
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$newentry = new stdClass();
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$newentry->filename = $parent_page_filename;
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$newentry->size = 0;
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$newentry->lastmodified = 0;
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$newentry->lasteditor = "none";
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$pageindex->$parent_pagename = $newentry;
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}
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check_subpage_parents($parent_pagename);
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}
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/*
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* @summary makes a path safe
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*
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* @details paths may only contain alphanumeric characters, spaces, underscores, and dashes
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*/
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function makepathsafe($string)
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{
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$string = preg_replace("/[^0-9a-zA-Z\_\-\ \/\.]/i", "", $string);
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$string = preg_replace("/\.+/", ".", $string);
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return $string;
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}
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/*
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* @summary Hides an email address from bots by adding random html entities.
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*
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* @returns The mangled email address.
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*/
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function hide_email($str)
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{
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$hidden_email = "";
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for($i = 0; $i < strlen($str); $i++)
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{
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if($str[$i] == "@")
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{
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$hidden_email .= "&#" . ord("@") . ";";
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continue;
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}
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if(rand(0, 1) == 0)
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$hidden_email .= $str[$i];
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else
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$hidden_email .= "&#" . ord($str[$i]) . ";";
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}
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return $hidden_email;
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}
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/*
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* @summary Checks to see if $haystack starts with $needle.
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*
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* @param $haystack {string} The string to search.
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* @param $needle {string} The string to search for at the beginning of $haystack.
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*
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* @returns {boolean} Whether $needle can be found at the beginning of $haystack.
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*/
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function starts_with($haystack, $needle)
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{
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$length = strlen($needle);
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return (substr($haystack, 0, $length) === $needle);
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}
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function system_mime_type_extensions() {
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global $settings;
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# Returns the system MIME type mapping of MIME types to extensions, as defined in /etc/mime.types (considering the first
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# extension listed to be canonical).
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$out = array();
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$file = fopen($settings->mime_extension_mappings_location, 'r');
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while(($line = fgets($file)) !== false) {
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$line = trim(preg_replace('/#.*/', '', $line));
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if(!$line)
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continue;
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$parts = preg_split('/\s+/', $line);
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if(count($parts) == 1)
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continue;
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$type = array_shift($parts);
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if(!isset($out[$type]))
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$out[$type] = array_shift($parts);
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}
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fclose($file);
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return $out;
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}
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function system_mime_type_extension($type) {
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# Returns the canonical file extension for the MIME type specified, as defined in /etc/mime.types (considering the first
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# extension listed to be canonical).
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#
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# $type - the MIME type
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static $exts;
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if(!isset($exts))
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$exts = system_mime_type_extensions();
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return isset($exts[$type]) ? $exts[$type] : null;
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}
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///////////////////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////////////////
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//////////////////////////// Security and Consistency Measures ////////////////////////////
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///////////////////////////////////////////////////////////////////////////////////////////
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/*
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* Sort out the pageindex. We create it if it doesn't exist, and load and parse
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* it if it does.
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*/
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if(!file_exists("./pageindex.json"))
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{
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$existingpages = glob_recursive("*.md");
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$pageindex = new stdClass();
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// We use a for loop here because foreach doesn't loop over new values inserted
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// while we were looping
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for($i = 0; $i < count($existingpages); $i++)
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{
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$pagefilename = $existingpages[$i];
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// Create a new entry
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$newentry = new stdClass();
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$newentry->filename = utf8_encode($pagefilename); // Store the filename
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$newentry->size = filesize($pagefilename); // Store the page size
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$newentry->lastmodified = filemtime($pagefilename); // Store the date last modified
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// Todo find a way to keep the last editor independent of the page index
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$newentry->lasteditor = utf8_encode("unknown"); // Set the editor to "unknown"
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// Extract the name of the (sub)page without the ".md"
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$pagekey = utf8_encode(substr($pagefilename, 0, -3));
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// Subpage parent checker
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if(strpos($pagekey, "/") !== false)
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{
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// We have a sub page people
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// Work out what our direct parent's key must be in order to check to
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// make sure that it actually exists. If it doesn't, then we need to
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// create it.
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$subpage_parent_key = substr($pagekey, 0, strrpos($pagekey, "/"));
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$subpage_parent_filename = "$subpage_parent_key.md";
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if(array_search($subpage_parent_filename, $existingpages) === false)
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{
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// Our parent page doesn't acutally exist - create it
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touch($subpage_parent_filename, 0);
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// Furthermore, we should add this page to the list of existing pages
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// in order for it to be indexed
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$existingpages[] = $subpage_parent_filename;
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}
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}
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// Store the new entry in the new page index
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$pageindex->$pagekey = $newentry;
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}
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file_put_contents("./pageindex.json", json_encode($pageindex, JSON_PRETTY_PRINT));
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unset($existingpages);
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}
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else
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{
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$pageindex = json_decode(file_get_contents("./pageindex.json"));
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}
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// 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
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if(!isset($_GET["action"]) and !isset($_GET["page"]))
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{
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http_response_code(302);
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header("location: index.php?action=$settings->defaultaction&page=$settings->defaultpage");
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exit();
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}
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// Make sure that the action is set
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if(!isset($_GET["action"]))
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$_GET["action"] = $settings->defaultaction;
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// Make sure that the page is set
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if(!isset($_GET["page"]) or strlen($_GET["page"]) === 0)
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$_GET["page"] = $settings->defaultpage;
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// Redirect the user to the safe version of the path if they entered an unsafe character
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if(makepathsafe($_GET["page"]) !== $_GET["page"])
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{
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http_response_code(301);
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header("location: index.php?action=" . rawurlencode($_GET["action"]) . "&page=" . makepathsafe($_GET["page"]));
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header("x-requested-page: " . $_GET["page"]);
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header("x-actual-page: " . makepathsafe($_GET["page"]));
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exit();
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}
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$env->page = $_GET["page"];
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$env->action = strtolower($_GET["action"]);
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///////////////////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////// HTML fragments //////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////////////////
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class page_renderer
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{
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public static $html_template = "<!DOCTYPE html>
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<html>
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<head>
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<meta charset='utf-8' />
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<title>{title}</title>
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<meta name='viewport' content='width=device-width, initial-scale=1' />
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<link rel='shortcut-icon' href='{favicon-url}' />
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<link rel='icon' href='{favicon-url}' />
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{header-html}
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</head>
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<body>
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{body}
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<!-- Took {generation-time-taken} seconds to generate -->
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</body>
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</html>
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";
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public static $main_content_template = "{navigation-bar}
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<h1 class='sitename'>{sitename}</h1>
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<main>
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{content}
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</main>
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<footer>
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<p>{footer-message}</p>
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<p>Powered by Pepperminty Wiki {version}, which was built by <a href='//starbeamrainbowlabs.com/'>Starbeamrainbowlabs</a>. Send bugs to 'bugs at starbeamrainbowlabs dot com' or <a href='//github.com/sbrl/Pepperminty-Wiki' title='Github Issue Tracker'>open an issue</a>.</p>
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<p>Your local friendly administrators are {admins-name-list}.</p>
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<p>This wiki is managed by <a href='mailto:{admin-details-email}'>{admin-details-name}</a>.</p>
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</footer>
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{navigation-bar-bottom}
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{all-pages-datalist}";
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public static $minimal_content_template = "<main class='printable'>{content}</main>
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<footer class='printable'>
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<hr class='footerdivider' />
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<p><em>From {sitename}, which is managed by {admin-details-name}.</em></p>
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<p>{footer-message}</p>
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<p><em>Timed at {generation-date}</em></p>
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<p><em>Powered by Pepperminty Wiki {version}.</em></p>
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</footer>";
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// An array of functions that have been registered to process the
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// find / replace array before the page is rendered. Note that the function
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// should take a *reference* to an array as its only argument.
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protected static $part_processors = [];
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// Registers a function as a part post processor.
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public static function register_part_preprocessor($function)
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{
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global $settings;
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// Make sure that the function we are about to register is valid
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if(!is_callable($function))
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{
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http_response_code(500);
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$admin_name = $settings->admindetails["name"];
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$admin_email = hide_email($settings->admindetails["email"]);
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exit(page_renderer::render("$settings->sitename - Module Error", "<p>$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 $admin_name at <a href='mailto:$admin_email'>$admin_email</a>."));
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}
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self::$part_processors[] = $function;
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return true;
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}
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public static function render($title, $content, $body_template = false)
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{
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global $settings, $start_time, $version;
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if($body_template === false)
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$body_template = self::$main_content_template;
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if(strlen($settings->logo_url) > 0)
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{
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// A logo url has been specified
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$logo_html = "<img class='logo' src='$settings->logo_url' />";
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switch($settings->logo_position)
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{
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case "left":
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$logo_html = "$logo_html $settings->sitename";
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break;
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case "right":
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$logo_html .= " $settings->sitename";
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break;
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default:
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throw new Exception("Invalid logo_position '$settings->logo_position'. Valid values are either \"left\" or \"right\" and are case sensitive.");
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}
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}
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$parts = [
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"{body}" => $body_template,
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"{sitename}" => $logo_html,
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"{version}" => $version,
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"{favicon-url}" => $settings->favicon,
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"{header-html}" => self::get_css_as_html(),
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"{navigation-bar}" => self::render_navigation_bar($settings->nav_links, $settings->nav_links_extra, "top"),
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"{navigation-bar-bottom}" => self::render_navigation_bar($settings->nav_links_bottom, [], "bottom"),
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"{admin-details-name}" => $settings->admindetails["name"],
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"{admin-details-email}" => $settings->admindetails["email"],
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"{admins-name-list}" => implode(", ", $settings->admins),
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"{generation-date}" => date("l jS \of F Y \a\\t h:ia T"),
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"{all-pages-datalist}" => self::generate_all_pages_datalist(),
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"{footer-message}" => $settings->footer_message
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];
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|
|
// Pass the parts through the part processors
|
|
foreach(self::$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("/^[^\/]*\/\/|^\//", $settings->css))
|
|
return "<link rel='stylesheet' href='$settings->css' />";
|
|
else
|
|
return "<style>$settings->css</style>";
|
|
}
|
|
|
|
public static $nav_divider = "<span class='nav-divider inflexible'> | </span>";
|
|
|
|
/*
|
|
* @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;
|
|
$result = "<nav class='$class'>\n";
|
|
|
|
// Loop over all the navigation links
|
|
foreach($nav_links as $item)
|
|
{
|
|
if(is_string($item))
|
|
{
|
|
// The item is a string
|
|
switch($item)
|
|
{
|
|
//keywords
|
|
case "user-status":
|
|
if($env->is_logged_in)
|
|
{
|
|
$result .= "<span class='inflexible'>Logged in as " . self::render_username($env->user) . ".</span> "/* . page_renderer::$nav_divider*/;
|
|
$result .= "<span><a href='index.php?action=logout'>Logout</a></span>";
|
|
$result .= page_renderer::$nav_divider;
|
|
}
|
|
else
|
|
$result .= "<span class='inflexible'>Browsing as Anonymous.</span>" . /*page_renderer::$nav_divider . */"<span><a href='index.php?action=login'>Login</a></span>" . page_renderer::$nav_divider;
|
|
break;
|
|
|
|
case "search": // Displays a search bar
|
|
$result .= "<span class='inflexible'><form method='get' action='index.php' style='display: inline;'><input type='search' name='page' list='allpages' placeholder='Type a page name here and hit enter' /></form></span>";
|
|
break;
|
|
|
|
case "divider": // Displays a divider
|
|
$result .= page_renderer::$nav_divider;
|
|
break;
|
|
|
|
case "menu":
|
|
$result .= "<span class='inflexible nav-more'><label for='more-menu-toggler'>More...</label>
|
|
<input type='checkbox' class='off-screen' id='more-menu-toggler' />";
|
|
$result .= page_renderer::render_navigation_bar($nav_links_extra, [], "nav-more-menu");
|
|
$result .= "</span>";
|
|
break;
|
|
|
|
// It isn't a keyword, so just output it directly
|
|
default:
|
|
$result .= "<span>$item</span>";
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Output the item as a link to a url
|
|
$result .= "<span><a href='" . str_replace("{page}", $env->page, $item[1]) . "'>$item[0]</a></span>";
|
|
}
|
|
}
|
|
|
|
$result .= "</nav>";
|
|
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;
|
|
|
|
$result = "<datalist id='allpages'>\n";
|
|
foreach($pageindex as $pagename => $pagedetails)
|
|
{
|
|
$result .= "\t\t\t<option value='$pagename' />\n";
|
|
}
|
|
$result .= "\t\t</datalist>";
|
|
|
|
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.
|
|
$parsers = [
|
|
"none" => function() {
|
|
throw new Exception("No parser registered!");
|
|
}
|
|
];
|
|
function add_parser($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] = $parser_code;
|
|
}
|
|
function parse_page_source($source)
|
|
{
|
|
global $settings, $parsers;
|
|
if(!isset($parsers[$settings->parser]))
|
|
exit(page_renderer::render_main("Parsing error - $settings->sitename", "<p>Parsing some page source data failed. This is most likely because $settings->sitename has the parser setting set incorrectly. Please contact <a href='mailto:" . hide_email($settings->admindetails["email"]) . "'>" . $settings->admindetails["name"] . "</a>, 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 register a new proprocessor that will be executed just before
|
|
// an edit is saved.
|
|
$save_preprocessors = [];
|
|
function register_save_preprocessor($func)
|
|
{
|
|
global $save_preprocessors;
|
|
$save_preprocessors[] = $func;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////
|
|
|
|
|
|
// %next_module% //
|
|
|
|
|
|
// Execute each module's code
|
|
foreach($modules as $moduledata)
|
|
{
|
|
$moduledata["code"]();
|
|
}
|
|
// Make sure that the credits page exists
|
|
if(!isset($actions->credits))
|
|
{
|
|
exit(page_renderer::render_main("Error - $settings->$sitename", "<p>No credits page detected. The credits page is a required module!</p>"));
|
|
}
|
|
|
|
// Perform the appropriate action
|
|
$action_name = $env->action;
|
|
if(isset($actions->$action_name))
|
|
{
|
|
$req_action_data = $actions->$action_name;
|
|
$req_action_data();
|
|
}
|
|
else
|
|
{
|
|
exit(page_renderer::render_main("Error - $settings->sitename", "<p>No action called " . strtolower($_GET["action"]) ." has been registered. Perhaps you are missing a module?</p>"));
|
|
}
|
|
|
|
?>
|