fix: make Pastedown great again (some code by Aftercase)

composer.json

@@ -19,7 +19,8 @@
     "scrivo/highlight.php": "^9.18",
     "erusev/parsedown": "^1.7",
     "illuminate/database": "^9.4",
-    "ext-redis": "*"
+    "ext-redis": "*",
+    "erusev/parsedown-extra": "^0.8.1"
   },
   "autoload": {
     "psr-4": {

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "e4f29c3440a94cc63c1b5d37ca4f76e8",
+    "content-hash": "84a10eea0cdac506e1b208869ec7879e",
     "packages": [
         {
             "name": "brick/math",
@@ -202,6 +202,57 @@
             },
             "time": "2019-12-30T22:54:17+00:00"
         },
+        {
+            "name": "erusev/parsedown-extra",
+            "version": "0.8.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/erusev/parsedown-extra.git",
+                "reference": "91ac3ff98f0cea243bdccc688df43810f044dcef"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/erusev/parsedown-extra/zipball/91ac3ff98f0cea243bdccc688df43810f044dcef",
+                "reference": "91ac3ff98f0cea243bdccc688df43810f044dcef",
+                "shasum": ""
+            },
+            "require": {
+                "erusev/parsedown": "^1.7.4"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.8.35"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-0": {
+                    "ParsedownExtra": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Emanuil Rusev",
+                    "email": "hello@erusev.com",
+                    "homepage": "http://erusev.com"
+                }
+            ],
+            "description": "An extension of Parsedown that adds support for Markdown Extra.",
+            "homepage": "https://github.com/erusev/parsedown-extra",
+            "keywords": [
+                "markdown",
+                "markdown extra",
+                "parsedown",
+                "parser"
+            ],
+            "support": {
+                "issues": "https://github.com/erusev/parsedown-extra/issues",
+                "source": "https://github.com/erusev/parsedown-extra/tree/0.8.x"
+            },
+            "time": "2019-12-30T23:20:37+00:00"
+        },
         {
             "name": "illuminate/collections",
             "version": "v9.52.4",

includes/Models/Paste.php

@@ -48,13 +48,17 @@ class Paste extends Model {
 
     public function expiryDisplay() {
         $expiry = $this->expiry;
-        if (!$expiry) {
+        if (!$expiry || $expiry === 'NULL') { // TODO: Investigate why this is a string
             return 'Never';
         }
+
         if ($expiry == 'SELF') {
             return '<b>View Once</b>';
         }
-        $dateTime = new DateTime();
+
+        var_dump($expiry);
+
+        $dateTime = new DateTime($expiry);
         $dateTime->setTimestamp($expiry);
         $ret = $dateTime->format('Y-m-d H:i:s');
         if ($dateTime->diff(new DateTime())->days < 1) {

includes/Pastedown.php

@@ -0,0 +1,70 @@
+<?php
+namespace PonePaste;
+
+use ParsedownExtra;
+
+class Pastedown extends ParsedownExtra {
+    public function __construct() {
+        $this->BlockTypes['>'] = ['Greentext'];
+        $this->BlockTypes['<'] []= ['Redtext'];
+        $this->BlockTypes['@'] = ['Purpletext'];
+    }
+
+
+    protected function blockGreentext($Line)
+    {
+        if (preg_match('/^>[ ]?(.*)/', $Line['text'], $matches))
+        {
+            $Block = array(
+                'element' => array(
+                    'name' => 'span',
+                    'attributes' => [
+                        'class' => 'greentext'
+                    ],
+                    'handler' => 'line',
+                    'text' => $matches[0],
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    protected function blockRedtext($Line)
+    {
+        if (preg_match('/^<[ ]?(.*)/', $Line['text'], $matches))
+        {
+            $Block = array(
+                'element' => array(
+                    'name' => 'span',
+                    'handler' => 'line',
+                    'attributes' => [
+                        'class' => 'redtext'
+                    ],
+                    'text' => $matches[0],
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    protected function blockPurpletext($Line)
+    {
+        if (preg_match('/^@[ ]?(.*)/', $Line['text'], $matches))
+        {
+            $Block = array(
+                'element' => array(
+                    'name' => 'span',
+                    'handler' => 'line',
+                    'attributes' => [
+                        'class' => 'purpletext'
+                    ],
+                    'text' => $matches[0],
+                ),
+            );
+
+            return $Block;
+        }
+    }
+}

public/paste.php

@@ -6,6 +6,7 @@ require_once(__DIR__ . '/../includes/common.php');
 use Highlight\Highlighter;
 use PonePaste\Models\Paste;
 use PonePaste\Models\User;
+use PonePaste\Pastedown;
 
 function isRequesterLikelyBot() : bool {
     return str_contains(strtolower($_SERVER['HTTP_USER_AGENT']), 'bot');
@@ -212,7 +213,7 @@ $p_content = rtrim($p_content);
 $p_content = htmlspecialchars_decode($p_content);
 
 if ($paste_code === "pastedown" || $paste_code === 'pastedown_old') {
-    $parsedown = new Parsedown();
+    $parsedown = new Pastedown();
     $parsedown->setSafeMode(true);
     $p_content = $parsedown->text($p_content);
 } else {

public/theme/bulma/css/paste.css

@@ -260,4 +260,17 @@ button.button--no-style {
 code {
     overflow-wrap: anywhere;
     white-space: pre-wrap;
-}
+}
+
+.content .greentext {
+    color: #789922;
+    content: ">";
+}
+
+.content .redtext {
+    color: #d12222;
+}
+
+.content .purpletext {
+    color: #9f14ae;
+}

vendor/composer/autoload_namespaces.php

@@ -6,6 +6,7 @@ $vendorDir = dirname(__DIR__);
 $baseDir = dirname($vendorDir);
 
 return array(
+    'ParsedownExtra' => array($vendorDir . '/erusev/parsedown-extra'),
     'Parsedown' => array($vendorDir . '/erusev/parsedown'),
     'Highlight\\' => array($vendorDir . '/scrivo/highlight.php'),
     'HighlightUtilities\\' => array($vendorDir . '/scrivo/highlight.php'),

vendor/composer/autoload_static.php

@@ -158,6 +158,10 @@ class ComposerStaticInit5bf95489f4eff2c10ec062bf7ba377da
     public static $prefixesPsr0 = array (
         'P' => 
         array (
+            'ParsedownExtra' => 
+            array (
+                0 => __DIR__ . '/..' . '/erusev/parsedown-extra',
+            ),
             'Parsedown' => 
             array (
                 0 => __DIR__ . '/..' . '/erusev/parsedown',

vendor/composer/installed.json

@@ -205,6 +205,60 @@
             },
             "install-path": "../erusev/parsedown"
         },
+        {
+            "name": "erusev/parsedown-extra",
+            "version": "0.8.1",
+            "version_normalized": "0.8.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/erusev/parsedown-extra.git",
+                "reference": "91ac3ff98f0cea243bdccc688df43810f044dcef"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/erusev/parsedown-extra/zipball/91ac3ff98f0cea243bdccc688df43810f044dcef",
+                "reference": "91ac3ff98f0cea243bdccc688df43810f044dcef",
+                "shasum": ""
+            },
+            "require": {
+                "erusev/parsedown": "^1.7.4"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.8.35"
+            },
+            "time": "2019-12-30T23:20:37+00:00",
+            "type": "library",
+            "installation-source": "dist",
+            "autoload": {
+                "psr-0": {
+                    "ParsedownExtra": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Emanuil Rusev",
+                    "email": "hello@erusev.com",
+                    "homepage": "http://erusev.com"
+                }
+            ],
+            "description": "An extension of Parsedown that adds support for Markdown Extra.",
+            "homepage": "https://github.com/erusev/parsedown-extra",
+            "keywords": [
+                "markdown",
+                "markdown extra",
+                "parsedown",
+                "parser"
+            ],
+            "support": {
+                "issues": "https://github.com/erusev/parsedown-extra/issues",
+                "source": "https://github.com/erusev/parsedown-extra/tree/0.8.x"
+            },
+            "install-path": "../erusev/parsedown-extra"
+        },
         {
             "name": "illuminate/collections",
             "version": "v9.52.4",

vendor/composer/installed.php

@@ -3,7 +3,7 @@
         'name' => 'aftercase/ponepaste',
         'pretty_version' => 'dev-main',
         'version' => 'dev-main',
-        'reference' => '9bd921ee714769fcddbcbbd0d7c49a64336794f9',
+        'reference' => 'ca52ccebb87c68aa9a6e0cf2cd58e9278736033a',
         'type' => 'library',
         'install_path' => __DIR__ . '/../../',
         'aliases' => array(),
@@ -13,7 +13,7 @@
         'aftercase/ponepaste' => array(
             'pretty_version' => 'dev-main',
             'version' => 'dev-main',
-            'reference' => '9bd921ee714769fcddbcbbd0d7c49a64336794f9',
+            'reference' => 'ca52ccebb87c68aa9a6e0cf2cd58e9278736033a',
             'type' => 'library',
             'install_path' => __DIR__ . '/../../',
             'aliases' => array(),
@@ -46,6 +46,15 @@
             'aliases' => array(),
             'dev_requirement' => false,
         ),
+        'erusev/parsedown-extra' => array(
+            'pretty_version' => '0.8.1',
+            'version' => '0.8.1.0',
+            'reference' => '91ac3ff98f0cea243bdccc688df43810f044dcef',
+            'type' => 'library',
+            'install_path' => __DIR__ . '/../erusev/parsedown-extra',
+            'aliases' => array(),
+            'dev_requirement' => false,
+        ),
         'illuminate/collections' => array(
             'pretty_version' => 'v9.52.4',
             'version' => '9.52.4.0',

vendor/erusev/parsedown-extra/.travis.yml

@@ -0,0 +1,30 @@
+language: php
+
+dist: trusty
+sudo: false
+
+matrix:
+  include:
+    - php: 5.3
+      dist: precise
+    - php: 5.4
+    - php: 5.5
+    - php: 5.6
+    - php: 7.0
+    - php: 7.1
+    - php: 7.2
+    - php: 7.3
+    - php: 7.4
+    - php: nightly
+  fast_finish: true
+  allow_failures:
+    - php: nightly
+    - php: hhvm-nightly
+
+install:
+  - composer install --prefer-source
+
+script:
+  - vendor/bin/phpunit
+  - vendor/bin/phpunit vendor/erusev/parsedown/test/CommonMarkTestWeak.php || true
+  - '[ -z "$TRAVIS_TAG" ] || [ "$TRAVIS_TAG" == "$(php -r "require(\"ParsedownExtra.php\"); echo ParsedownExtra::version;")" ]'

vendor/erusev/parsedown-extra/LICENSE.txt

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 Emanuil Rusev, erusev.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/erusev/parsedown-extra/ParsedownExtra.php

@@ -0,0 +1,538 @@
+<?php
+
+#
+#
+# Parsedown Extra
+# https://github.com/erusev/parsedown-extra
+#
+# (c) Emanuil Rusev
+# http://erusev.com
+#
+# For the full license information, view the LICENSE file that was distributed
+# with this source code.
+#
+#
+
+class ParsedownExtra extends Parsedown
+{
+    # ~
+
+    const version = '0.8.1';
+
+    # ~
+
+    function __construct()
+    {
+        if (version_compare(parent::version, '1.7.4') < 0)
+        {
+            throw new Exception('ParsedownExtra requires a later version of Parsedown');
+        }
+
+        $this->BlockTypes[':'] []= 'DefinitionList';
+        $this->BlockTypes['*'] []= 'Abbreviation';
+
+        # identify footnote definitions before reference definitions
+        array_unshift($this->BlockTypes['['], 'Footnote');
+
+        # identify footnote markers before before links
+        array_unshift($this->InlineTypes['['], 'FootnoteMarker');
+    }
+
+    #
+    # ~
+
+    function text($text)
+    {
+        $markup = parent::text($text);
+
+        # merge consecutive dl elements
+
+        $markup = preg_replace('/<\/dl>\s+<dl>\s+/', '', $markup);
+
+        # add footnotes
+
+        if (isset($this->DefinitionData['Footnote']))
+        {
+            $Element = $this->buildFootnoteElement();
+
+            $markup .= "\n" . $this->element($Element);
+        }
+
+        return $markup;
+    }
+
+    #
+    # Blocks
+    #
+
+    #
+    # Abbreviation
+
+    protected function blockAbbreviation($Line)
+    {
+        if (preg_match('/^\*\[(.+?)\]:[ ]*(.+?)[ ]*$/', $Line['text'], $matches))
+        {
+            $this->DefinitionData['Abbreviation'][$matches[1]] = $matches[2];
+
+            $Block = array(
+                'hidden' => true,
+            );
+
+            return $Block;
+        }
+    }
+
+    #
+    # Footnote
+
+    protected function blockFootnote($Line)
+    {
+        if (preg_match('/^\[\^(.+?)\]:[ ]?(.*)$/', $Line['text'], $matches))
+        {
+            $Block = array(
+                'label' => $matches[1],
+                'text' => $matches[2],
+                'hidden' => true,
+            );
+
+            return $Block;
+        }
+    }
+
+    protected function blockFootnoteContinue($Line, $Block)
+    {
+        if ($Line['text'][0] === '[' and preg_match('/^\[\^(.+?)\]:/', $Line['text']))
+        {
+            return;
+        }
+
+        if (isset($Block['interrupted']))
+        {
+            if ($Line['indent'] >= 4)
+            {
+                $Block['text'] .= "\n\n" . $Line['text'];
+
+                return $Block;
+            }
+        }
+        else
+        {
+            $Block['text'] .= "\n" . $Line['text'];
+
+            return $Block;
+        }
+    }
+
+    protected function blockFootnoteComplete($Block)
+    {
+        $this->DefinitionData['Footnote'][$Block['label']] = array(
+            'text' => $Block['text'],
+            'count' => null,
+            'number' => null,
+        );
+
+        return $Block;
+    }
+
+    #
+    # Definition List
+
+    protected function blockDefinitionList($Line, $Block)
+    {
+        if ( ! isset($Block) or isset($Block['type']))
+        {
+            return;
+        }
+
+        $Element = array(
+            'name' => 'dl',
+            'handler' => 'elements',
+            'text' => array(),
+        );
+
+        $terms = explode("\n", $Block['element']['text']);
+
+        foreach ($terms as $term)
+        {
+            $Element['text'] []= array(
+                'name' => 'dt',
+                'handler' => 'line',
+                'text' => $term,
+            );
+        }
+
+        $Block['element'] = $Element;
+
+        $Block = $this->addDdElement($Line, $Block);
+
+        return $Block;
+    }
+
+    protected function blockDefinitionListContinue($Line, array $Block)
+    {
+        if ($Line['text'][0] === ':')
+        {
+            $Block = $this->addDdElement($Line, $Block);
+
+            return $Block;
+        }
+        else
+        {
+            if (isset($Block['interrupted']) and $Line['indent'] === 0)
+            {
+                return;
+            }
+
+            if (isset($Block['interrupted']))
+            {
+                $Block['dd']['handler'] = 'text';
+                $Block['dd']['text'] .= "\n\n";
+
+                unset($Block['interrupted']);
+            }
+
+            $text = substr($Line['body'], min($Line['indent'], 4));
+
+            $Block['dd']['text'] .= "\n" . $text;
+
+            return $Block;
+        }
+    }
+
+    #
+    # Header
+
+    protected function blockHeader($Line)
+    {
+        $Block = parent::blockHeader($Line);
+
+        if (! isset($Block)) {
+            return null;
+        }
+
+        if (preg_match('/[ #]*{('.$this->regexAttribute.'+)}[ ]*$/', $Block['element']['text'], $matches, PREG_OFFSET_CAPTURE))
+        {
+            $attributeString = $matches[1][0];
+
+            $Block['element']['attributes'] = $this->parseAttributeData($attributeString);
+
+            $Block['element']['text'] = substr($Block['element']['text'], 0, $matches[0][1]);
+        }
+
+        return $Block;
+    }
+
+    #
+    # Markup
+
+    protected function blockMarkupComplete($Block)
+    {
+        if ( ! isset($Block['void']))
+        {
+            $Block['markup'] = $this->processTag($Block['markup']);
+        }
+
+        return $Block;
+    }
+
+    #
+    # Setext
+
+    protected function blockSetextHeader($Line, array $Block = null)
+    {
+        $Block = parent::blockSetextHeader($Line, $Block);
+
+        if (! isset($Block)) {
+            return null;
+        }
+
+        if (preg_match('/[ ]*{('.$this->regexAttribute.'+)}[ ]*$/', $Block['element']['text'], $matches, PREG_OFFSET_CAPTURE))
+        {
+            $attributeString = $matches[1][0];
+
+            $Block['element']['attributes'] = $this->parseAttributeData($attributeString);
+
+            $Block['element']['text'] = substr($Block['element']['text'], 0, $matches[0][1]);
+        }
+
+        return $Block;
+    }
+
+    #
+    # Inline Elements
+    #
+
+    #
+    # Footnote Marker
+
+    protected function inlineFootnoteMarker($Excerpt)
+    {
+        if (preg_match('/^\[\^(.+?)\]/', $Excerpt['text'], $matches))
+        {
+            $name = $matches[1];
+
+            if ( ! isset($this->DefinitionData['Footnote'][$name]))
+            {
+                return;
+            }
+
+            $this->DefinitionData['Footnote'][$name]['count'] ++;
+
+            if ( ! isset($this->DefinitionData['Footnote'][$name]['number']))
+            {
+                $this->DefinitionData['Footnote'][$name]['number'] = ++ $this->footnoteCount; # » &
+            }
+
+            $Element = array(
+                'name' => 'sup',
+                'attributes' => array('id' => 'fnref'.$this->DefinitionData['Footnote'][$name]['count'].':'.$name),
+                'handler' => 'element',
+                'text' => array(
+                    'name' => 'a',
+                    'attributes' => array('href' => '#fn:'.$name, 'class' => 'footnote-ref'),
+                    'text' => $this->DefinitionData['Footnote'][$name]['number'],
+                ),
+            );
+
+            return array(
+                'extent' => strlen($matches[0]),
+                'element' => $Element,
+            );
+        }
+    }
+
+    private $footnoteCount = 0;
+
+    #
+    # Link
+
+    protected function inlineLink($Excerpt)
+    {
+        $Link = parent::inlineLink($Excerpt);
+
+        if (! isset($Link)) {
+            return null;
+        }
+
+        $remainder = substr($Excerpt['text'], $Link['extent']);
+
+        if (preg_match('/^[ ]*{('.$this->regexAttribute.'+)}/', $remainder, $matches))
+        {
+            $Link['element']['attributes'] += $this->parseAttributeData($matches[1]);
+
+            $Link['extent'] += strlen($matches[0]);
+        }
+
+        return $Link;
+    }
+
+    #
+    # ~
+    #
+
+    protected function unmarkedText($text)
+    {
+        $text = parent::unmarkedText($text);
+
+        if (isset($this->DefinitionData['Abbreviation']))
+        {
+            foreach ($this->DefinitionData['Abbreviation'] as $abbreviation => $meaning)
+            {
+                $pattern = '/\b'.preg_quote($abbreviation, '/').'\b/';
+
+                $text = preg_replace($pattern, '<abbr title="'.$meaning.'">'.$abbreviation.'</abbr>', $text);
+            }
+        }
+
+        return $text;
+    }
+
+    #
+    # Util Methods
+    #
+
+    protected function addDdElement(array $Line, array $Block)
+    {
+        $text = substr($Line['text'], 1);
+        $text = trim($text);
+
+        unset($Block['dd']);
+
+        $Block['dd'] = array(
+            'name' => 'dd',
+            'handler' => 'line',
+            'text' => $text,
+        );
+
+        if (isset($Block['interrupted']))
+        {
+            $Block['dd']['handler'] = 'text';
+
+            unset($Block['interrupted']);
+        }
+
+        $Block['element']['text'] []= & $Block['dd'];
+
+        return $Block;
+    }
+
+    protected function buildFootnoteElement()
+    {
+        $Element = array(
+            'name' => 'div',
+            'attributes' => array('class' => 'footnotes'),
+            'handler' => 'elements',
+            'text' => array(
+                array(
+                    'name' => 'hr',
+                ),
+                array(
+                    'name' => 'ol',
+                    'handler' => 'elements',
+                    'text' => array(),
+                ),
+            ),
+        );
+
+        uasort($this->DefinitionData['Footnote'], 'self::sortFootnotes');
+
+        foreach ($this->DefinitionData['Footnote'] as $definitionId => $DefinitionData)
+        {
+            if ( ! isset($DefinitionData['number']))
+            {
+                continue;
+            }
+
+            $text = $DefinitionData['text'];
+
+            $text = parent::text($text);
+
+            $numbers = range(1, $DefinitionData['count']);
+
+            $backLinksMarkup = '';
+
+            foreach ($numbers as $number)
+            {
+                $backLinksMarkup .= ' <a href="#fnref'.$number.':'.$definitionId.'" rev="footnote" class="footnote-backref">&#8617;</a>';
+            }
+
+            $backLinksMarkup = substr($backLinksMarkup, 1);
+
+            if (substr($text, - 4) === '</p>')
+            {
+                $backLinksMarkup = '&#160;'.$backLinksMarkup;
+
+                $text = substr_replace($text, $backLinksMarkup.'</p>', - 4);
+            }
+            else
+            {
+                $text .= "\n".'<p>'.$backLinksMarkup.'</p>';
+            }
+
+            $Element['text'][1]['text'] []= array(
+                'name' => 'li',
+                'attributes' => array('id' => 'fn:'.$definitionId),
+                'rawHtml' => "\n".$text."\n",
+            );
+        }
+
+        return $Element;
+    }
+
+    # ~
+
+    protected function parseAttributeData($attributeString)
+    {
+        $Data = array();
+
+        $attributes = preg_split('/[ ]+/', $attributeString, - 1, PREG_SPLIT_NO_EMPTY);
+
+        foreach ($attributes as $attribute)
+        {
+            if ($attribute[0] === '#')
+            {
+                $Data['id'] = substr($attribute, 1);
+            }
+            else # "."
+            {
+                $classes []= substr($attribute, 1);
+            }
+        }
+
+        if (isset($classes))
+        {
+            $Data['class'] = implode(' ', $classes);
+        }
+
+        return $Data;
+    }
+
+    # ~
+
+    protected function processTag($elementMarkup) # recursive
+    {
+        # http://stackoverflow.com/q/1148928/200145
+        libxml_use_internal_errors(true);
+
+        $DOMDocument = new DOMDocument;
+
+        # http://stackoverflow.com/q/11309194/200145
+        $elementMarkup = mb_convert_encoding($elementMarkup, 'HTML-ENTITIES', 'UTF-8');
+
+        # http://stackoverflow.com/q/4879946/200145
+        $DOMDocument->loadHTML($elementMarkup);
+        $DOMDocument->removeChild($DOMDocument->doctype);
+        $DOMDocument->replaceChild($DOMDocument->firstChild->firstChild->firstChild, $DOMDocument->firstChild);
+
+        $elementText = '';
+
+        if ($DOMDocument->documentElement->getAttribute('markdown') === '1')
+        {
+            foreach ($DOMDocument->documentElement->childNodes as $Node)
+            {
+                $elementText .= $DOMDocument->saveHTML($Node);
+            }
+
+            $DOMDocument->documentElement->removeAttribute('markdown');
+
+            $elementText = "\n".$this->text($elementText)."\n";
+        }
+        else
+        {
+            foreach ($DOMDocument->documentElement->childNodes as $Node)
+            {
+                $nodeMarkup = $DOMDocument->saveHTML($Node);
+
+                if ($Node instanceof DOMElement and ! in_array($Node->nodeName, $this->textLevelElements))
+                {
+                    $elementText .= $this->processTag($nodeMarkup);
+                }
+                else
+                {
+                    $elementText .= $nodeMarkup;
+                }
+            }
+        }
+
+        # because we don't want for markup to get encoded
+        $DOMDocument->documentElement->nodeValue = 'placeholder\x1A';
+
+        $markup = $DOMDocument->saveHTML($DOMDocument->documentElement);
+        $markup = str_replace('placeholder\x1A', $elementText, $markup);
+
+        return $markup;
+    }
+
+    # ~
+
+    protected function sortFootnotes($A, $B) # callback
+    {
+        return $A['number'] - $B['number'];
+    }
+
+    #
+    # Fields
+    #
+
+    protected $regexAttribute = '(?:[#.][-\w]+[ ]*)';
+}

vendor/erusev/parsedown-extra/README.md

@@ -0,0 +1,31 @@
+> You might also like [Caret](http://caret.io?ref=parsedown) - our Markdown editor for the Desktop.
+
+## Parsedown Extra
+
+[![Build Status](https://img.shields.io/travis/erusev/parsedown-extra/master.svg?style=flat-square)](https://travis-ci.org/erusev/parsedown-extra)
+
+An extension of [Parsedown](http://parsedown.org) that adds support for [Markdown Extra](https://michelf.ca/projects/php-markdown/extra/).
+
+[See Demo](http://parsedown.org/extra/)
+
+### Installation
+
+Include both `Parsedown.php` and `ParsedownExtra.php` or install [the composer package](https://packagist.org/packages/erusev/parsedown-extra).
+
+### Example
+
+``` php
+$Extra = new ParsedownExtra();
+
+echo $Extra->text('# Header {.sth}'); # prints: <h1 class="sth">Header</h1>
+```
+
+### Questions
+
+**Who uses Parsedown Extra?**
+
+[October CMS](http://octobercms.com/), [Bolt CMS](http://bolt.cm/), [Kirby CMS](http://getkirby.com/), [Grav CMS](http://getgrav.org/), [Statamic CMS](http://www.statamic.com/) and [more](https://www.versioneye.com/php/erusev:parsedown-extra/references).
+
+**How can I help?**
+
+Use it, star it, share it and in case you feel generous, [donate some money](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=528P3NZQMP8N2).

vendor/erusev/parsedown-extra/composer.json

@@ -0,0 +1,33 @@
+{
+    "name": "erusev/parsedown-extra",
+    "description": "An extension of Parsedown that adds support for Markdown Extra.",
+    "keywords": ["markdown", "markdown extra", "parser", "parsedown"],
+    "homepage": "https://github.com/erusev/parsedown-extra",
+    "type": "library",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Emanuil Rusev",
+            "email": "hello@erusev.com",
+            "homepage": "http://erusev.com"
+        }
+    ],
+    "require": {
+        "erusev/parsedown": "^1.7.4"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^4.8.35"
+    },
+    "autoload": {
+        "psr-0": {"ParsedownExtra": ""}
+    },
+    "autoload-dev": {
+        "psr-0": {
+            "TestParsedown": "test/",
+            "ParsedownExtraTest": "test/",
+            "ParsedownTest": "vendor/erusev/parsedown/test/",
+            "CommonMarkTest": "vendor/erusev/parsedown/test/",
+            "CommonMarkTestWeak": "vendor/erusev/parsedown/test/"
+        }
+    }
+}

vendor/erusev/parsedown-extra/phpunit.xml.dist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit bootstrap="vendor/autoload.php" colors="true">
+	<testsuites>
+		<testsuite>
+			<file>test/ParsedownExtraTest.php</file>
+		</testsuite>
+	</testsuites>
+</phpunit>

vendor/erusev/parsedown-extra/test/ParsedownExtraTest.php

@@ -0,0 +1,11 @@
+<?php
+
+class ParsedownExtraTest extends ParsedownTest
+{
+    protected function initDirs()
+    {
+        $dirs = parent::initDirs();
+        $dirs[] = __DIR__ . '/data/';
+        return $dirs;
+    }
+}

vendor/erusev/parsedown-extra/test/TestParsedown.php

@@ -0,0 +1,9 @@
+<?php
+
+class TestParsedown extends ParsedownExtra
+{
+    public function getTextLevelElements()
+    {
+        return $this->textLevelElements;
+    }
+}

vendor/erusev/parsedown-extra/test/data/abbreviation.html

@@ -0,0 +1,3 @@
+<p>The <abbr title="Hyper Text Markup Language">HTML</abbr> specification
+is maintained by the <abbr title="World Wide Web Consortium">W3C</abbr>.
+The abbreviation <abbr title="Markup Language">ML</abbr> is contained in the abbreviation <abbr title="Hyper Text Markup Language">HTML</abbr>.</p>

vendor/erusev/parsedown-extra/test/data/abbreviation.md

@@ -0,0 +1,7 @@
+The HTML specification
+is maintained by the W3C.
+The abbreviation ML is contained in the abbreviation HTML.
+
+*[HTML]: Hyper Text Markup Language
+*[W3C]: World Wide Web Consortium
+*[ML]: Markup Language

vendor/erusev/parsedown-extra/test/data/compound_footnote.html

@@ -0,0 +1,18 @@
+<p>footnote <sup id="fnref1:1"><a href="#fn:1" class="footnote-ref">1</a></sup> and another one <sup id="fnref1:2"><a href="#fn:2" class="footnote-ref">2</a></sup></p>
+<div class="footnotes">
+<hr />
+<ol>
+<li id="fn:1">
+<p>line 1
+line 2</p>
+<blockquote>
+<p>quote</p>
+</blockquote>
+<p>another paragraph&#160;<a href="#fnref1:1" rev="footnote" class="footnote-backref">&#8617;</a></p>
+</li>
+<li id="fn:2">
+<p>paragraph</p>
+<p>another paragraph&#160;<a href="#fnref1:2" rev="footnote" class="footnote-backref">&#8617;</a></p>
+</li>
+</ol>
+</div>

vendor/erusev/parsedown-extra/test/data/compound_footnote.md

@@ -0,0 +1,14 @@
+footnote [^1] and another one [^2]
+
+[^1]: line 1
+      line 2
+
+    > quote
+
+    another paragraph
+      
+[^2]:
+    paragraph
+    
+    another paragraph
+    

vendor/erusev/parsedown-extra/test/data/definition_list.html

@@ -0,0 +1,17 @@
+<dl>
+<dt>Term 1</dt>
+<dd>one</dd>
+<dd>two
+extra line</dd>
+<dt>Term 2</dt>
+<dd><p>lazy
+line</p></dd>
+<dd><p>multiple</p>
+<p>paragraphs</p></dd>
+<dd><p>nested</p>
+<pre><code>code block</code></pre>
+<blockquote>
+<p>quote
+block</p>
+</blockquote></dd>
+</dl>

vendor/erusev/parsedown-extra/test/data/definition_list.md

@@ -0,0 +1,20 @@
+Term 1
+:   one
+:   two
+    extra line
+
+Term 2
+
+:   lazy
+line
+
+:   multiple
+
+    paragraphs
+
+:   nested
+
+        code block
+
+    > quote
+    > block

vendor/erusev/parsedown-extra/test/data/footnote.html

@@ -0,0 +1,20 @@
+<p>first <sup id="fnref1:1"><a href="#fn:1" class="footnote-ref">1</a></sup> second <sup id="fnref1:2"><a href="#fn:2" class="footnote-ref">2</a></sup>.</p>
+<p>first <sup id="fnref1:a"><a href="#fn:a" class="footnote-ref">3</a></sup> second <sup id="fnref1:b"><a href="#fn:b" class="footnote-ref">4</a></sup>.</p>
+<p>second time <sup id="fnref2:1"><a href="#fn:1" class="footnote-ref">1</a></sup></p>
+<div class="footnotes">
+<hr />
+<ol>
+<li id="fn:1">
+<p>one&#160;<a href="#fnref1:1" rev="footnote" class="footnote-backref">&#8617;</a> <a href="#fnref2:1" rev="footnote" class="footnote-backref">&#8617;</a></p>
+</li>
+<li id="fn:2">
+<p>two&#160;<a href="#fnref1:2" rev="footnote" class="footnote-backref">&#8617;</a></p>
+</li>
+<li id="fn:a">
+<p>one&#160;<a href="#fnref1:a" rev="footnote" class="footnote-backref">&#8617;</a></p>
+</li>
+<li id="fn:b">
+<p>two&#160;<a href="#fnref1:b" rev="footnote" class="footnote-backref">&#8617;</a></p>
+</li>
+</ol>
+</div>

vendor/erusev/parsedown-extra/test/data/footnote.md

@@ -0,0 +1,11 @@
+first [^1] second [^2].
+
+[^1]: one
+[^2]: two
+
+first [^a] second [^b].
+
+[^a]: one
+[^b]: two
+
+second time [^1]

vendor/erusev/parsedown-extra/test/data/markdown_inside_markup.html

@@ -0,0 +1,25 @@
+<div class="example">
+<p><em>markdown</em></p>
+<p>This is another paragraph. It contains <em>inline markup</em>.</p>
+<div>
+_no markdown_
+</div>
+</div>
+<hr />
+<div>
+<p><em>markdown</em></p>
+<div>
+<p><em>markdown</em></p>
+</div>
+</div>
+<hr />
+<div>
+_no markdown_
+<div>
+<p><em>markdown</em></p>
+</div>
+</div>
+<hr />
+<div markdown="0">
+_no markdown_
+</div>

vendor/erusev/parsedown-extra/test/data/markdown_inside_markup.md

@@ -0,0 +1,32 @@
+<div class="example" markdown="1">
+_markdown_
+
+This is another paragraph. It contains <em>inline markup</em>.
+<div>
+_no markdown_
+</div>
+</div>
+
+---
+
+<div markdown="1">
+_markdown_
+<div markdown="1">
+_markdown_
+</div>
+</div>
+
+---
+
+<div>
+_no markdown_
+<div markdown="1">
+_markdown_
+</div>
+</div>
+
+---
+
+<div markdown="0">
+_no markdown_
+</div>

vendor/erusev/parsedown-extra/test/data/special_attributes.html

@@ -0,0 +1,6 @@
+<h1 id="header1">Header 1</h1>
+<h2 id="header2">Header 2</h2>
+<h2 class="main">The Site</h2>
+<h2 id="the-site" class="main shine">The Site</h2>
+<p><a href="http://parsedown.org" id="link" class="primary upper-case">link</a></p>
+<p><img src="/md.png" alt="logo" id="logo" class="big" /></p>

vendor/erusev/parsedown-extra/test/data/special_attributes.md

@@ -0,0 +1,12 @@
+Header 1 {#header1}
+========
+
+## Header 2 ## {#header2}
+
+## The Site ## {.main}
+
+## The Site ## {.main .shine #the-site}
+
+[link](http://parsedown.org) {.primary #link .upper-case}
+
+![logo](/md.png) {#logo .big}