/
parser-parsedown.php
1514 lines (1324 loc) · 58.6 KB
/
parser-parsedown.php
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<?php
register_module([
"name" => "Parsedown",
"version" => "0.10.2",
"author" => "Emanuil Rusev & Starbeamrainbowlabs",
"description" => "An upgraded (now default!) parser based on Emanuil Rusev's Parsedown Extra PHP library (https://github.com/erusev/parsedown-extra), which is licensed MIT. Please be careful, as this module adds some weight to your installation.",
"extra_data" => [
/********** Parsedown versions **********
* Parsedown Core: 1.8.0-beta-7 *
* Parsedown Extra: 0.8.0-beta-1 *
* Parsedown Extreme: 0.1.6 *removed* *
****************************************/
"Parsedown.php" => "https://raw.githubusercontent.com/erusev/parsedown/1610e4747c88a53676f94f752b447f4eff03c28d/Parsedown.php",
// "ParsedownExtra.php" => "https://raw.githubusercontent.com/erusev/parsedown-extra/91ac3ff98f0cea243bdccc688df43810f044dcef/ParsedownExtra.php",
// "Parsedown.php" => "https://raw.githubusercontent.com/erusev/parsedown/3825db53a2be5d9ce54436a9cc557c6bdce1808a/Parsedown.php",
"ParsedownExtra.php" => "https://raw.githubusercontent.com/erusev/parsedown-extra/352d03d941fc801724e82e49424ff409175261fd/ParsedownExtra.php"
// Parsedown Extreme is causing PHP 7.4+ errors, and isn't rendering correctly with the security features we have turned on.
// "ParsedownExtended.php" => "https://raw.githubusercontent.com/BenjaminHoegh/ParsedownExtended/8e1224e61a199cb513c47398353a27f6ba822da6/ParsedownExtended.php"
// "ParsedownExtreme.php" => "https://raw.githubusercontent.com/BenjaminHoegh/parsedown-extreme/adae4136534ad1e4159fe04c74c4683681855b84/ParsedownExtreme.php"
],
"id" => "parser-parsedown",
"code" => function() {
global $settings;
$parser = new PeppermintParsedown();
$parser->setInternalLinkBase("?page=%s");
add_parser("parsedown", function($source, $untrusted) use ($parser) {
global $settings;
$parser->setsafeMode($untrusted || $settings->all_untrusted);
$parser->setMarkupEscaped($settings->clean_raw_html);
$result = $parser->text($source);
return $result;
}, function($source) {
global $version, $settings, $pageindex;
$id_text = "$version|$settings->parser|$source";
// Find template includes
preg_match_all(
'/\{\{\s*([^|]+)\s*(?:\|[^}]*)?\}\}/',
$source, $includes
);
foreach($includes[1] as $include_pagename) {
if(empty($pageindex->$include_pagename))
continue;
$id_text .= "|$include_pagename:" . parsedown_pagename_resolve(
$pageindex->$include_pagename->lastmodified
);
}
return str_replace(["+","/"], ["-","_"], base64_encode(hash(
"sha256",
$id_text,
true
)));
});
add_action("parsedown-render-ext", function() {
global $settings, $env, $paths;
if(!$settings->parser_ext_renderers_enabled) {
http_response_code(403);
header("content-type: image/png");
imagepng(errorimage("Error: External diagram renderer support\nhas been disabled on $settings->sitename.\nTry contacting {$settings->admindetails_name}, $settings->sitename's administrator."));
exit();
}
if(!isset($_GET["source"])) {
http_response_code(400);
header("content-type: image/png");
imagepng(errorimage("Error: No source text \nspecified."));
exit();
}
if(!isset($_GET["language"])) {
http_response_code(400);
header("content-type: image/png");
imagepng(errorimage("Error: No external renderer \nlanguage specified."));
exit();
}
$source = $_GET["source"];
$language = $_GET["language"];
if(!isset($settings->parser_ext_renderers->$language)) {
$message = "Error: Unknown language {$_GET["language"]}.\nSupported languages:\n";
foreach($settings->parser_ext_renderers as $language => $spec)
$message .= "$spec->name ($language)\n";
http_response_code(400);
header("content-type: image/png");
imagepng(errorimage(trim($message)));
exit();
}
$renderer = $settings->parser_ext_renderers->$language;
$cache_id = hash("sha256",
hash("sha256", $language) .
hash("sha256", $source) .
($_GET["immutable_key"] ?? "")
);
$cache_file_location = "{$paths->cache_directory}/render_ext/$cache_id." . system_mime_type_extension($renderer->output_format);
// If it exists on disk already, then serve that instead
if(file_exists($cache_file_location)) {
header("cache-control: public, max-age=31536000, immutable");
header("content-type: $renderer->output_format");
header("content-length: " . filesize($cache_file_location));
header("x-cache: render_ext/hit");
readfile($cache_file_location);
exit();
}
if(!$settings->parser_ext_allow_anon && !$env->is_logged_in) {
http_response_code(401);
header("content-type: image/png");
imagepng(errorimage(wordwrap("Error: You aren't logged in, that image hasn't yet been cached, and $settings->sitename does not allow anonymous users to invoke external renderers, so that image can't be generated right now. Try contacting $settings->admindetails_name, $settings->sitename's administrator (their details can be found at the bottom of every page).")));
exit();
}
// Create the cache directory if doesn't exist already
if(!file_exists(dirname($cache_file_location)))
mkdir(dirname($cache_file_location), 0750, true);
$cli_to_execute = $renderer->cli;
$descriptors = [
0 => null, // stdin
1 => null, // stdout
2 => tmpfile() // stderr
];
switch ($renderer->cli_mode) {
case "pipe":
// Fill stdin with the input text
$descriptors[0] = tmpfile();
fwrite($descriptors[0], $source);
fseek($descriptors[0], 0);
// Pipe the output to be the cache file
$descriptors[1] = fopen($cache_file_location, "wb+");
break;
case "substitution_pipe":
// Update the command that we're going to execute
$cli_to_execute = str_replace(
"{input_text}",
escapeshellarg($source),
$cli_to_execute
);
// Set the descriptors
$descriptors[0] = tmpfile();
$descriptors[1] = fopen($cache_file_location, "wb+");
break;
case "file":
$descriptors[0] = tmpfile();
fwrite($descriptors[0], $source);
$descriptors[1] = tmpfile();
$cli_to_execute = str_replace(
[ "{input_file}", "{output_file}" ],
[
escapeshellarg(stream_get_meta_data($descriptors[0])["uri"]),
escapeshellarg($cache_file_location)
],
$cli_to_execute
);
break;
default:
http_response_code(503);
header("cache-control: no-cache, no-store, must-revalidate");
header("content-type: image/png");
imagepng(errorimage("Error: Unknown external renderer mode '$renderer->cli_mode'.\nPlease contact $settings->admindetails_name, $settings->sitename's administrator."));
exit();
break;
}
if('\\' !== DIRECTORY_SEPARATOR) {
// We're not on Windows, so we can use timeout to force-kill if it takes too long
$cli_to_execute = "timeout {$settings->parser_ext_time_limit} $cli_to_execute";
}
$start_time = microtime(true);
$process_handle = proc_open(
$cli_to_execute,
$descriptors,
$pipes,
null, // working directory
null // environment variables
);
if(!is_resource($process_handle)) {
fclose($descriptors[0]);
fclose($descriptors[1]);
fclose($descriptors[2]);
if(file_exists($cache_file_location)) unlink($cache_file_location);
http_response_code(503);
header("cache-control: no-cache, no-store, must-revalidate");
header("content-type: image/png");
imagepng(errorimage("Error: Failed to start external renderer.\nIs $renderer->name installed?"));
exit();
}
// Wait for it to exit
$exit_code = proc_close($process_handle);
fclose($descriptors[0]);
fclose($descriptors[1]);
$time_taken = round((microtime(true) - $start_time) * 1000, 2);
if($exit_code !== 0 || !file_exists($cache_file_location)) {
fseek($descriptors[2], 0);
$error_details = stream_get_contents($descriptors[2]);
// Delete the cache file, which is guaranteed to exist because
// we pre-emptively create it above
if(file_exists($cache_file_location)) unlink($cache_file_location);
http_response_code(503);
header("content-type: image/png");
imagepng(errorimage(
"Error: The external renderer ($renderer->name)\nexited with code $exit_code,\nor potentially did not create the output file.\nDetails:\n" . wordwrap($error_details)
));
exit();
}
header("cache-control: public, max-age=31536000, immutable");
header("content-type: $renderer->output_format");
header("content-length: " . filesize($cache_file_location));
header("x-cache: render_ext/miss, renderer took {$time_taken}ms");
readfile($cache_file_location);
});
/*
* ███████ ████████ █████ ████████ ██ ███████ ████████ ██ ██████ ███████
* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
* ███████ ██ ███████ ██ ██ ███████ ██ ██ ██ ███████
* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
* ███████ ██ ██ ██ ██ ██ ███████ ██ ██ ██████ ███████
*/
statistic_add([
"id" => "wanted-pages",
"name" => "Wanted Pages",
"type" => "page",
"update" => function($old_stats) {
global $pageindex, $env;
$result = new stdClass(); // completed, value, state
$pages = [];
foreach($pageindex as $pagename => $pagedata) {
if(!file_exists($env->storage_prefix . $pagedata->filename))
continue;
$page_content = file_get_contents($env->storage_prefix . $pagedata->filename);
$page_links = PeppermintParsedown::extract_page_names($page_content);
foreach($page_links as $linked_page) {
// We're only interested in pages that don't exist
if(!empty($pageindex->$linked_page)) continue;
if(empty($pages[$linked_page]))
$pages[$linked_page] = 0;
$pages[$linked_page]++;
}
}
arsort($pages);
$result->value = $pages;
$result->completed = true;
return $result;
},
"render" => function($stats_data) {
$result = "<h2>$stats_data->name</h2>\n";
$result .= "<table class='wanted-pages'>\n";
$result .= "\t<tr><th>Page Name</th><th>Linking Pages</th></tr>\n";
foreach($stats_data->value as $pagename => $linking_pages) {
$result .= "\t<tr><td>$pagename</td><td>$linking_pages</td></tr>\n";
}
$result .= "</table>\n";
return $result;
}
]);
statistic_add([
"id" => "orphan-pages",
"name" => "Orphan Pages",
"type" => "page-list",
"update" => function($old_stats) {
global $pageindex, $env;
$result = new stdClass(); // completed, value, state
$pages = [];
foreach($pageindex as $pagename => $pagedata) {
if(!file_exists($env->storage_prefix . $pagedata->filename))
continue;
$page_content = file_get_contents($env->storage_prefix . $pagedata->filename);
$page_links = PeppermintParsedown::extract_page_names($page_content);
foreach($page_links as $linked_page) {
// We're only interested in pages that exist
if(empty($pageindex->$linked_page)) continue;
$pages[$linked_page] = true;
}
}
$orphaned_pages = [];
foreach($pageindex as $pagename => $page_data) {
if(empty($pages[$pagename]))
$orphaned_pages[] = $pagename;
}
$sorter = new Collator("");
$sorter->sort($orphaned_pages);
$result->value = $orphaned_pages;
$result->completed = true;
return $result;
}
]);
statistic_add([
"id" => "most-linked-to-pages",
"name" => "Most Linked-To Pages",
"type" => "page",
"update" => function($old_stats) {
global $pageindex, $env;
$result = new stdClass(); // completed, value, state
$pages = [];
foreach($pageindex as $pagename => $pagedata) {
if(!file_exists($env->storage_prefix . $pagedata->filename))
continue;
$page_content = file_get_contents($env->storage_prefix . $pagedata->filename);
$page_links = PeppermintParsedown::extract_page_names($page_content);
foreach($page_links as $linked_page) {
// We're only interested in pages that exist
if(empty($pageindex->$linked_page)) continue;
if(empty($pages[$linked_page]))
$pages[$linked_page] = 0;
$pages[$linked_page]++;
}
}
arsort($pages);
$result->value = $pages;
$result->completed = true;
return $result;
},
"render" => function($stats_data) {
global $pageindex;
$result = "<h2>$stats_data->name</h2>\n";
$result .= "<table class='most-linked-to-pages'>\n";
$result .= "\t<tr><th>Page Name</th><th>Linking Pages</th></tr>\n";
foreach($stats_data->value as $pagename => $link_count) {
$pagename_display = !empty($pageindex->$pagename->redirect) && $pageindex->$pagename->redirect ? "<em>$pagename</em>" : $pagename;
$result .= "\t<tr><td><a href='?page=" . rawurlencode($pagename) . "'>$pagename_display</a></td><td>$link_count</td></tr>\n";
}
$result .= "</table>\n";
return $result;
}
]);
add_help_section("20-parser-default", "Editor Syntax",
"<p>$settings->sitename's editor uses an extended version of <a href='http://parsedown.org/'>Parsedown</a> to render pages, which is a fantastic open source Github flavoured markdown parser. You can find a quick reference guide on Github flavoured markdown <a href='https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet'>here</a> by <a href='https://github.com/adam-p/'>adam-p</a>, or if you prefer a book <a href='https://www.gitbook.com/book/roachhd/master-markdown/details'>Mastering Markdown</a> by KB is a good read, and free too!</p>
<h3>Tips</h3>
<ul>
<li>Put 2 spaces at the end of a line to add a soft line break. Leave a blank line to add a head line break (i.e. a new paragraph).</li>
<li>You can add an id to a header that you can link to. Put it in curly braces after the heading name like this: <code># Heading Name {#HeadingId}</code>. Then you can link to like like this: <code>[[Page name#HeadingId}]]</code>. You can also link to a heading id on the current page by omitting the page name: <code>[[#HeadingId]]</code>.</li>
</ul>
<h3>Extra Syntax</h3>
<p>$settings->sitename's editor also supports some extra custom syntax, some of which is inspired by <a href='https://mediawiki.org/'>Mediawiki</a>.
<table>
<tr><th style='width: 40%'>Type this</th><th style='width: 20%'>To get this</th><th>Comments</th></th>
<tr><td><code>[[Internal link]]</code></td><td><a href='?page=Internal%20link'>Internal Link</a></td><td>An internal link.</td></tr>
<tr><td><code>[[Internal link|Display Text]]</code></td><td><a href='?page=Internal%20link'>Display Text</a></td><td>An internal link with some display text.</td></tr>
<tr><td><code></code></td><td><img src='http://example.com/path/to/image.png' alt='Alt text' style='float: right; max-width: 256px; max-height: 256px;' /></td><td>An image floating to the right of the page that fits inside a 256px x 256px box, preserving aspect ratio.</td></tr>
<tr><td><code></code></td><td><figure><img src='http://example.com/path/to/image.png' alt='Alt text' style='max-width: 256px; max-height: 256px;' /><figcaption>Alt text</figcaption></figure></td><td>An image with a caption that fits inside a 256px x 256px box, preserving aspect ratio. The presence of the word <code>caption</code> in the regular braces causes the alt text to be taken and displayed below the image itself.</td></tr>
<tr><td><code></code></td><td><img src='index.php?action=preview&page=Files/Cheese.png' alt='Alt text' style='' /></td><td>An example of the short url syntax for images. Simply enter the page name of an image (or video / audio file), and Pepperminty Wiki will sort out the url for you.</td></tr>
<tr><td><code>Some text ==marked text== more text</code></td><td>Some text <mark>marked text</mark> more text</td><td>Marked / highlighted text</td></tr>
<tr><td><code>Some text^superscript^ more text</code></td><td>Some text<sup>superscript</sup> more text</td><td>Superscript</td></tr>
<tr><td><code>Some text~subscript~ more text</code></td><td>Some text<sub>subscript</sub> more text</td><td>Subscript (note that we use a single tilda <code>~</code> here - a double results in strikethrough text instead)</td></tr>
<tr><td><code>[ ] Unticked checkbox</code></td><td><input type='checkbox' disabled /> Unticked checkbox</td><td>An unticked checkbox. Must be at the beginning of a line or directly after a list item (e.g. <code> - </code> or <code>1. </code>).</td></tr>
<tr><td><code>[x] Ticked checkbox</code></td><td><input type='checkbox' checked='checked' disabled /> Ticked checkbox</td><td>An ticked checkbox. The same rules as unticked checkboxes apply here too.</td></tr>
<tr><td><code>some text >!spoiler text!< more text</code></td><td>some text <a class='spoiler' href='#spoiler-example' id='spoiler-example'>spoiler text</a> more text</td><td>A spoiler. Users must click it to reveal the content hidden beneath.</td></tr>
<tr><td><code>some text ||spoiler text|| more text</code></td><td>some text <a class='spoiler' href='#spoiler-example-2' id='spoiler-example-2'>spoiler text</a> more text</td><td>Alternative spoiler syntax inspired by <a href='https://support.discord.com/hc/en-us/articles/360022320632-Spoiler-Tags-'>Discord</a>.</td></tr>
<tr><td><code>[__TOC__]</code></td><td></td><td>An automatic table of contents. Note that this must be on a line by itself with no text before or after it on that line for it to work.</td></tr>
</table>
<p>Note that the all image image syntax above can be mixed and matched to your liking. The <code>caption</code> option in particular must come last or next to last.</p>
<h4>Templating</h4>
<p>$settings->sitename also supports including one page in another page as a <em>template</em>. The syntax is very similar to that of Mediawiki. For example, <code>{{Announcement banner}}</code> will include the contents of the \"Announcement banner\" page, assuming it exists.</p>
<p>You can also use variables. Again, the syntax here is very similar to that of Mediawiki - they can be referenced in the included page by surrrounding the variable name in triple curly braces (e.g. <code>{{{Announcement text}}}</code>), and set when including a page with the bar syntax (e.g. <code>{{Announcement banner | importance = high | text = Maintenance has been planned for tonight.}}</code>). Currently the only restriction in templates and variables is that you may not include a closing curly brace (<code>}</code>) in the page name, variable name, or value.</p>
<h5>Special Variables</h5>
<p>$settings->sitename also supports a number of special built-in variables. Their syntax and function are described below:</p>
<table>
<tr><th>Type this</th><th>To get this</th></tr>
<tr><td><code>{{{@}}}</code></td><td>Lists all variables and their values in a table.</td></tr>
<tr><td><code>{{{#}}}</code></td><td>Shows a 'stack trace', outlining all the parent includes of the current page being parsed.</td></tr>
<tr><td><code>{{{~}}}</code></td><td>Outputs the requested page's name.</td></tr>
<tr><td><code>{{{*}}}</code></td><td>Outputs a comma separated list of all the subpages of the current page.</td></tr>
<tr><td><code>{{{+}}}</code></td><td>Shows a gallery containing all the files that are sub pages of the current page.</td></tr>
</table>");
if($settings->parser_ext_renderers_enabled) {
$doc_help = "<p>$settings->sitename supports external renderers. External renderers take the content of a code fence block, like this:</p>
<pre><code>```language_code
Insert text here
```</code></pre>
<p>...and render it to an image. This is based on the <code>language_code</code> specified, as is done in the above example. Precisely what the output of a external renderer is depends on the external renderers defined, but $settings->sitename currently has the following external renderers registered:</p>
<table>
<tr><th>Name</th><th>Language code</th><th>Description</th><th>Reference Link</th></tr>
";
foreach($settings->parser_ext_renderers as $code => $renderer) {
$row = array_map("htmlentities", [
$renderer->name,
$code,
$renderer->description,
$renderer->url
]);
$row[3] = "<a href='$row[3]'>🔗</a>";
$doc_help .= "<tr><td>".implode("</td><td>", $row)."</td></tr>\n";
}
$doc_help .= "</table>
$settings->admindetails_name can register more external renderers - see the <a href='https://starbeamrainbowlabs.com/labs/peppermint/__nightdocs/06.8-External-Renderers.html'>documentation</a> for more information.</p>";
add_help_section("24-external-renderers", "External Renderers", $doc_help);
}
}
]);
require_once("$paths->extra_data_directory/parser-parsedown/Parsedown.php");
require_once("$paths->extra_data_directory/parser-parsedown/ParsedownExtra.php");
// require_once("$paths->extra_data_directory/parser-parsedown/ParsedownExtended.php");
/**
* Attempts to 'auto-correct' a page name by trying different capitalisation
* combinations.
* @param string $pagename The page name to auto-correct.
* @return string The auto-corrected page name.
*/
function parsedown_pagename_resolve($pagename) {
global $pageindex;
// If the page doesn't exist, check varying different
// capitalisations to see if it exists under some variant.
if(!empty($pageindex->$pagename))
return $pagename;
$pagename = ucfirst($pagename);
if(!empty($pageindex->$pagename))
return $pagename;
$pagename = ucwords($pagename);
return $pagename;
}
/*
* ██████ █████ ██████ ███████ ███████ ██████ ██████ ██ ██ ███ ██
* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ████ ██
* ██████ ███████ ██████ ███████ █████ ██ ██ ██ ██ ██ █ ██ ██ ██ ██
* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ███ ██ ██ ██ ██
* ██ ██ ██ ██ ██ ███████ ███████ ██████ ██████ ███ ███ ██ ████
*
* ███████ ██ ██ ████████ ███████ ███ ██ ███████ ██ ██████ ███ ██ ███████
* ██ ██ ██ ██ ██ ████ ██ ██ ██ ██ ██ ████ ██ ██
* █████ ███ ██ █████ ██ ██ ██ ███████ ██ ██ ██ ██ ██ ██ ███████
* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
* ███████ ██ ██ ██ ███████ ██ ████ ███████ ██ ██████ ██ ████ ███████
*/
/**
* The Peppermint-flavoured Parsedown parser.
*/
class PeppermintParsedown extends ParsedownExtra
{
/**
* A long random and extremely unlikely string to identify where we want
* to put a table of contents.
* Hopefully nobody is unlucky enough to include this in a page...!
* @var string
*/
private const TOC_ID = "█yyZiy9c9oHVExhVummYZId_dO9-fvaGFvgQirEapxOtaL-s7WnK34lF9ObBoQ0EH2kvtd6VKcAL2█";
/**
* The base directory with which internal links will be resolved.
* @var string
*/
private $internalLinkBase = "./%s";
/**
* The parameter stack. Used for recursive templating.
* @var array
*/
protected $paramStack = [];
/**
* Creates a new Peppermint Parsedown instance.
*/
function __construct()
{
parent::__construct();
array_unshift($this->BlockTypes["["], "TableOfContents");
// Prioritise our internal link parsing over the regular link parsing
$this->addInlineType("[", "InternalLink", true);
// Prioritise the checkbox handling - this is fine 'cause it doesn't step on InternalLink's toes
$this->addInlineType("[", "Checkbox", true);
// Prioritise our image parser over the regular image parser
$this->addInlineType("!", "ExtendedImage", true);
$this->addInlineType("{", "Template");
$this->addInlineType("=", "Mark");
$this->addInlineType("^", "Superscript");
$this->addInlineType("~", "Subscript");
$this->addInlineType(">", "Spoiler", true);
$this->addInlineType("|", "Spoiler", true);
}
/**
* Helper method to add an inline type.
* @param string $char The char to match against.
* @param string $function_id The name bit of the function to call.
* @param boolean $before_others Whether to prioritise this function over other existing ones (default: false).
*/
protected function addInlineType(string $char, string $function_id, bool $before_others = false) {
if(mb_strlen($char) > 1)
throw new Exception("Error: '$char' is longer than a single character.");
if(!isset($this->InlineTypes[$char]) or !is_array($this->InlineTypes[$char]))
$this->InlineTypes[$char] = [];
if(strpos($this->inlineMarkerList, $char) === false)
$this->inlineMarkerList .= $char;
if(!$before_others)
$this->InlineTypes[$char][] = $function_id;
else
array_unshift($this->InlineTypes[$char], $function_id);
}
/*
* Override the text method here to insert the table of contents after
* rendering has been completed
*/
public function text($text) {
$result = parent::text($text);
$toc_html = $this->generateTableOfContents();
$result = str_replace(self::TOC_ID, $toc_html, $result);
return $result;
}
/*
* ████████ ███████ ███ ███ ██████ ██ █████ ████████ ██ ███ ██ ██████
* ██ ██ ████ ████ ██ ██ ██ ██ ██ ██ ██ ████ ██ ██
* ██ █████ ██ ████ ██ ██████ ██ ███████ ██ ██ ██ ██ ██ ██ ███
* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
* ██ ███████ ██ ██ ██ ███████ ██ ██ ██ ██ ██ ████ ██████
*/
/**
* Parses templating definitions.
* @param string $fragment The fragment to parse it out from.
*/
protected function inlineTemplate($fragment)
{
global $env, $pageindex;
// Variable parsing
if(preg_match("/\{\{\{([^}]+)\}\}\}/", $fragment["text"], $matches))
{
$params = [];
if(!empty($this->paramStack))
{
$stackEntry = array_slice($this->paramStack, -1)[0];
$params = !empty($stackEntry) ? $stackEntry["params"] : false;
}
$variableKey = trim($matches[1]);
$variableValue = false;
switch ($variableKey)
{
case "@": // Lists all variables and their values
if(!empty($params)) {
$variableValue = "<table>
<tr><th>Key</th><th>Value</th></tr>\n";
foreach($params as $key => $value)
{
$variableValue .= "\t<tr><td>" . $this->escapeText($key) . "</td><td>" . $this->escapeText($value) . "</td></tr>\n";
}
$variableValue .= "</table>";
}
else {
$variableValue = "<em>(no parameters have been specified)</em>";
}
break;
case "#": // Shows a stack trace
$variableValue = "<ol start=\"0\">\n";
$variableValue .= "\t<li>$env->page</li>\n";
foreach($this->paramStack as $curStackEntry)
{
$variableValue .= "\t<li>" . $curStackEntry["pagename"] . "</li>\n";
}
$variableValue .= "</ol>\n";
break;
case "~": // Show requested page's name
if(!empty($this->paramStack))
$variableValue = $this->escapeText($env->page);
break;
case "*": // Lists subpages
$subpages = get_subpages($pageindex, $env->page);
$variableValue = [];
foreach($subpages as $pagename => $depth)
{
$variableValue[] = $pagename;
}
$variableValue = implode(", ", $variableValue);
if(strlen($variableValue) === 0)
$variableValue = "<em>(none yet!)</em>";
break;
case "+": // Shows a file gallery for subpages with files
// If the upload module isn't present, then there's no point
// in checking for uploaded files
if(!module_exists("feature-upload"))
break;
$variableValue = [];
$subpages = get_subpages($pageindex, $env->page);
foreach($subpages as $pagename => $depth)
{
// Make sure that this is an uploaded file
if(!$pageindex->$pagename->uploadedfile)
continue;
$mime_type = $pageindex->$pagename->uploadedfilemime;
$previewSize = 300;
$previewUrl = "?action=preview&size=$previewSize&page=" . rawurlencode($pagename);
$previewHtml = "";
switch(substr($mime_type, 0, strpos($mime_type, "/")))
{
case "video":
$previewHtml .= "<video src='$previewUrl' controls preload='metadata'>$pagename</video>\n";
break;
case "audio":
$previewHtml .= "<audio src='$previewUrl' controls preload='metadata'>$pagename</audio>\n";
break;
case "application":
case "image":
default:
$previewHtml .= "<img src='$previewUrl' />\n";
break;
}
$previewHtml = "<a href='?page=" . rawurlencode($pagename) . "'>$previewHtml$pagename</a>";
$variableValue[$pagename] = "<li style='min-width: $previewSize" . "px; min-height: $previewSize" . "px;'>$previewHtml</li>";
}
if(count($variableValue) === 0)
$variableValue["default"] = "<li><em>(No files found)</em></li>\n";
$variableValue = implode("\n", $variableValue);
$variableValue = "<ul class='file-gallery'>$variableValue</ul>";
break;
}
if(isset($params[$variableKey]))
{
$variableValue = $params[$variableKey];
$variableValue = $this->escapeText($variableValue);
}
if($variableValue !== false)
{
return [
"extent" => strlen($matches[0]),
"markup" => $variableValue
];
}
}
else if(preg_match("/\{\{([^}]+)\}\}/", $fragment["text"], $matches))
{
$templateElement = $this->templateHandler($matches[1]);
if(!empty($templateElement))
{
return [
"extent" => strlen($matches[0]),
"element" => $templateElement
];
}
}
}
/**
* Handles parsing out templates - recursively - and the parameter stack associated with it.
* @param string $source The source string to process.
* @return array The parsed result
*/
protected function templateHandler($source)
{
global $pageindex, $env;
$parts = preg_split("/\\||¦/", trim($source, "{}"));
$parts = array_map("trim", $parts);
// Extract the name of the template page
$templatePagename = array_shift($parts);
// If the page that we are supposed to use as the tempalte doesn't
// exist, then there's no point in continuing.
if(empty($pageindex->$templatePagename))
return false;
// Parse the parameters
$params = [];
$i = 0;
foreach($parts as $part)
{
if(strpos($part, "=") !== false)
{
// This param contains an equals sign, so it's a named parameter
$keyValuePair = explode("=", $part, 2);
$keyValuePair = array_map("trim", $keyValuePair);
$params[$keyValuePair[0]] = $keyValuePair[1];
}
else
{
// This isn't a named parameter
$params["$i"] = trim($part);
$i++;
}
}
// Add the parsed parameters to the parameter stack
$this->paramStack[] = [
"pagename" => $templatePagename,
"params" => $params
];
$templateFilePath = $env->storage_prefix . $pageindex->$templatePagename->filename;
$parsedTemplateSource = $this->text(file_get_contents($templateFilePath));
// Remove the parsed parameters from the stack
array_pop($this->paramStack);
return [
"name" => "div",
"rawHtml" => $parsedTemplateSource,
"attributes" => [
"class" => "template"
]
];
}
/*
* ██████ ██ ██ ███████ ██████ ██ ██ ██████ ██████ ██ ██
* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
* ██ ███████ █████ ██ █████ ██████ ██ ██ ███
* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
* ██████ ██ ██ ███████ ██████ ██ ██ ██████ ██████ ██ ██
*/
protected function inlineCheckbox($fragment) {
// We're not interested if it's not at the beginning of a line
if(strpos($fragment["context"], $fragment["text"]) !== 0)
return;
// If it doesn't match, then we're not interested
if(preg_match('/\[([ x])\]/u', $fragment["text"], $matches) !== 1)
return;
$checkbox_content = $matches[1];
$result = [
"extent" => 3,
"element" => [
"name" => "input",
"attributes" => [
"type" => "checkbox",
"disabled" => "disabled"
]
]
];
if($checkbox_content === "x")
$result["element"]["attributes"]["checked"] = "checked";
return $result;
}
/*
* ███ ███ █████ ██████ ██ ██ ███████ ██████
* ████ ████ ██ ██ ██ ██ ██ ██ ██ ██ ██
* ██ ████ ██ ███████ ██████ █████ █████ ██ ██
* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
* ██ ██ ██ ██ ██ ██ ██ ██ ███████ ██████
*
* ████████ ███████ ██ ██ ████████
* ██ ██ ██ ██ ██
* ██ █████ ███ ██
* ██ ██ ██ ██ ██
* ██ ███████ ██ ██ ██
*/
protected function inlineMark($fragment) {
// A question mark makes the PCRE 1-or-more + there lazy instead of greedy.
// Ref https://www.rexegg.com/regex-quantifiers.html#greedytrap
if(preg_match('/==([^=]+?)==/', $fragment["text"], $matches) !== 1)
return;
$marked_text = $matches[1];
$result = [
"extent" => strlen($matches[0]),
"element" => [
"name" => "mark",
"handler" => [
"function" => "lineElements",
"argument" => $marked_text,
"destination" => "elements"
]
]
];
return $result;
}
/*
* ██████ ██ ██ ██████ ██ ██████ ██ ██ ██████ ███████ ██████
* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
* ███████ ██ ██ ██████ ██ ███████ ██ ██ ██████ █████ ██████
* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
* ██████ ██████ ██████ ██ ██████ ██████ ██ ███████ ██ ██
*
* ██████ ██████ ██████ ██ ██████ ████████
* ██ ██ ██ ██ ██ ██ ██ ██
* ███████ ██ ██████ ██ ██████ ██
* ██ ██ ██ ██ ██ ██ ██
* ██████ ██████ ██ ██ ██ ██ ██
*/
protected function inlineSuperscript($fragment) {
if(preg_match('/\^([^^]+?)\^/', $fragment["text"], $matches) !== 1)
return;
$superscript_text = $matches[1];
$result = [
"extent" => strlen($matches[0]),
"element" => [
"name" => "sup",
"handler" => [
"function" => "lineElements",
"argument" => $superscript_text,
"destination" => "elements"
]
]
];
return $result;
}
protected function inlineSubscript($fragment) {
if(preg_match('/~([^~]+?)~/', $fragment["text"], $matches) !== 1)
return;
$subscript_text = $matches[1];
$result = [
"extent" => strlen($matches[0]),
"element" => [
"name" => "sub",
"handler" => [
"function" => "lineElements",
"argument" => $subscript_text,
"destination" => "elements"
]
]
];
return $result;
}
/*
* ███████ ██████ ██████ ██ ██ ███████ ██████
* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
* ███████ ██████ ██ ██ ██ ██ █████ ██████
* ██ ██ ██ ██ ██ ██ ██ ██ ██
* ███████ ██ ██████ ██ ███████ ███████ ██ ██
*/
protected function inlineSpoiler($fragment) {
if(preg_match('/(?:\|\||>!)([^|]+?)(?:\|\||!<)/', $fragment["text"], $matches) !== 1)
return;
$spoiler_text = $matches[1];
$id = "spoiler-".crypto_id(24);
$result = [
"extent" => strlen($matches[0]),
"element" => [
"name" => "a",
"attributes" => [
"id" => $id,
"class" => "spoiler",
"href" => "#$id"
],
"handler" => [
"function" => "lineElements",
"argument" => $spoiler_text,
"destination" => "elements"
]
]
];
return $result;
}
/*
* ██ ███ ██ ████████ ███████ ██████ ███ ██ █████ ██
* ██ ████ ██ ██ ██ ██ ██ ████ ██ ██ ██ ██
* ██ ██ ██ ██ ██ █████ ██████ ██ ██ ██ ███████ ██
* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
* ██ ██ ████ ██ ███████ ██ ██ ██ ████ ██ ██ ███████
*
* ██ ██ ███ ██ ██ ██ ███████
* ██ ██ ████ ██ ██ ██ ██
* ██ ██ ██ ██ ██ █████ ███████
* ██ ██ ██ ██ ██ ██ ██ ██
* ███████ ██ ██ ████ ██ ██ ███████
*/
/**
* Parses internal links
* @param string $fragment The fragment to parse.
*/
protected function inlineInternalLink($fragment)
{
global $pageindex, $env;
if(preg_match('/^\[\[([^\]]*?)\]\]([^\s!?",;.()\[\]{}*=+\/]*)/u', $fragment["text"], $matches) === 1) {
// 1: Parse parameters out
// -------------------------------
$link_page = str_replace(["\r", "\n"], [" ", " "], trim($matches[1]));
$display = $link_page . trim($matches[2]);
if(strpos($matches[1], "|") !== false || strpos($matches[1], "¦") !== false)
{
// We have a bar character
$parts = preg_split("/\\||¦/", $matches[1], 2);
$link_page = trim($parts[0]); // The page to link to
$display = trim($parts[1]); // The text to display
}
// 2: Parse the hash out
// -------------------------------
$hash_code = "";
if(strpos($link_page, "#") !== false)
{
// We want to link to a subsection of a page
$hash_code = substr($link_page, strpos($link_page, "#") + 1);
$link_page = substr($link_page, 0, strpos($link_page, "#"));
// If $link_page is empty then we want to link to the current page
if(strlen($link_page) === 0)
$link_page = $env->page;
}
// 3: Page name auto-correction
// -------------------------------
$is_interwiki_link = module_exists("feature-interwiki-links") && is_interwiki_link($link_page);
// Try different variants on the pagename to try and get it to
// match something automagically
if(!$is_interwiki_link && empty($pageindex->$link_page))
$link_page = parsedown_pagename_resolve($link_page);
// 4: Construct the full url
// -------------------------------
$link_url = null;
// If it's an interwiki link, then handle it as such
if($is_interwiki_link)
$link_url = interwiki_get_pagename_url($link_page);
// If it isn't (or it failed), then try it as a normal link instead
if(empty($link_url)) {
$link_url = str_replace(
"%s", rawurlencode($link_page),
$this->internalLinkBase
);
// We failed to handle it as an interwiki link, so we should
// tell everyone that
$is_interwiki_link = false;