From 6c79e0c077971029343b2dff30017571ea118438 Mon Sep 17 00:00:00 2001
From: Klaus Weidenbach <Klaus.Weidenbach@gmx.net>
Date: Thu, 2 Mar 2017 23:25:04 +0100
Subject: :arrow_up: :hammer: Upgrade Markdownify library.

The current version 2.0.0 (alpha) throws deprecated warning with
PHP7.1 and PHPUnit.
Upgrade the HTML to Markdown converter for PHP to the current
Markdownify 2.2.1.
Used composer to manage this library.
---
 vendor/pixel418/markdownify/src/Converter.php      | 1400 ++++++++++++++++++++
 vendor/pixel418/markdownify/src/ConverterExtra.php |  573 ++++++++
 vendor/pixel418/markdownify/src/Parser.php         |  564 ++++++++
 3 files changed, 2537 insertions(+)
 create mode 100644 vendor/pixel418/markdownify/src/Converter.php
 create mode 100644 vendor/pixel418/markdownify/src/ConverterExtra.php
 create mode 100644 vendor/pixel418/markdownify/src/Parser.php

(limited to 'vendor/pixel418/markdownify/src')

diff --git a/vendor/pixel418/markdownify/src/Converter.php b/vendor/pixel418/markdownify/src/Converter.php
new file mode 100644
index 000000000..77c62dc7e
--- /dev/null
+++ b/vendor/pixel418/markdownify/src/Converter.php
@@ -0,0 +1,1400 @@
+<?php
+
+/* This file is part of the Markdownify project, which is under LGPL license */
+
+namespace Markdownify;
+
+/**
+ * default configuration
+ */
+define('MDFY_BODYWIDTH', false);
+define('MDFY_KEEPHTML', true);
+
+/**
+ * HTML to Markdown converter class
+ */
+class Converter
+{
+    /**
+     * html parser object
+     *
+     * @var parseHTML
+     */
+    protected $parser;
+
+    /**
+     * markdown output
+     *
+     * @var string
+     */
+    protected $output;
+
+    /**
+     * stack with tags which where not converted to html
+     *
+     * @var array<string>
+     */
+    protected $notConverted = array();
+
+    /**
+     * skip conversion to markdown
+     *
+     * @var bool
+     */
+    protected $skipConversion = false;
+
+    /* options */
+
+    /**
+     * keep html tags which cannot be converted to markdown
+     *
+     * @var bool
+     */
+    protected $keepHTML = false;
+
+    /**
+     * wrap output, set to 0 to skip wrapping
+     *
+     * @var int
+     */
+    protected $bodyWidth = 0;
+
+    /**
+     * minimum body width
+     *
+     * @var int
+     */
+    protected $minBodyWidth = 25;
+
+    /**
+     * position where the link reference will be displayed
+     *
+     *
+     * @var int
+     */
+    protected $linkPosition;
+    const LINK_AFTER_CONTENT = 0;
+    const LINK_AFTER_PARAGRAPH = 1;
+    const LINK_IN_PARAGRAPH = 2;
+
+    /**
+     * stores current buffers
+     *
+     * @var array<string>
+     */
+    protected $buffer = array();
+
+    /**
+     * stores current buffers
+     *
+     * @var array<string>
+     */
+    protected $footnotes = array();
+
+    /**
+     * tags with elements which can be handled by markdown
+     *
+     * @var array<string>
+     */
+    protected $isMarkdownable = array(
+        'p' => array(),
+        'ul' => array(),
+        'ol' => array(),
+        'li' => array(),
+        'br' => array(),
+        'blockquote' => array(),
+        'code' => array(),
+        'pre' => array(),
+        'a' => array(
+            'href' => 'required',
+            'title' => 'optional',
+        ),
+        'strong' => array(),
+        'b' => array(),
+        'em' => array(),
+        'i' => array(),
+        'img' => array(
+            'src' => 'required',
+            'alt' => 'optional',
+            'title' => 'optional',
+        ),
+        'h1' => array(),
+        'h2' => array(),
+        'h3' => array(),
+        'h4' => array(),
+        'h5' => array(),
+        'h6' => array(),
+        'hr' => array(),
+    );
+
+    /**
+     * html tags to be ignored (contents will be parsed)
+     *
+     * @var array<string>
+     */
+    protected $ignore = array(
+        'html',
+        'body',
+    );
+
+    /**
+     * html tags to be dropped (contents will not be parsed!)
+     *
+     * @var array<string>
+     */
+    protected $drop = array(
+        'script',
+        'head',
+        'style',
+        'form',
+        'area',
+        'object',
+        'param',
+        'iframe',
+    );
+
+    /**
+     * html block tags that allow inline & block children
+     *
+     * @var array<string>
+     */
+    protected $allowMixedChildren = array(
+        'li'
+    );
+
+    /**
+     * Markdown indents which could be wrapped
+     * @note: use strings in regex format
+     *
+     * @var array<string>
+     */
+    protected $wrappableIndents = array(
+        '\*   ', // ul
+        '\d.  ', // ol
+        '\d\d. ', // ol
+        '> ', // blockquote
+        '', // p
+    );
+
+    /**
+     * list of chars which have to be escaped in normal text
+     * @note: use strings in regex format
+     *
+     * @var array
+     *
+     * TODO: what's with block chars / sequences at the beginning of a block?
+     */
+    protected $escapeInText = array(
+        '\*\*([^*]+)\*\*' => '\*\*$1\*\*', // strong
+        '\*([^*]+)\*' => '\*$1\*', // em
+        '__(?! |_)(.+)(?!<_| )__' => '\_\_$1\_\_', // strong
+        '_(?! |_)(.+)(?!<_| )_' => '\_$1\_', // em
+        '([-*_])([ ]{0,2}\1){2,}' => '\\\\$0', // hr
+        '`' => '\`', // code
+        '\[(.+)\](\s*\()' => '\[$1\]$2', // links: [text] (url) => [text\] (url)
+        '\[(.+)\](\s*)\[(.*)\]' => '\[$1\]$2\[$3\]', // links: [text][id] => [text\][id\]
+        '^#(#{0,5}) ' => '\#$1 ', // header
+    );
+
+    /**
+     * wether last processed node was a block tag or not
+     *
+     * @var bool
+     */
+    protected $lastWasBlockTag = false;
+
+    /**
+     * name of last closed tag
+     *
+     * @var string
+     */
+    protected $lastClosedTag = '';
+
+    /**
+     * number of line breaks before next inline output
+     */
+    protected $lineBreaks = 0;
+
+    /**
+     * node stack, e.g. for <a> and <abbr> tags
+     *
+     * @var array<array>
+     */
+    protected $stack = array();
+
+    /**
+     * current indentation
+     *
+     * @var string
+     */
+    protected $indent = '';
+
+    /**
+     * constructor, set options, setup parser
+     *
+     * @param int $linkPosition define the position of links
+     * @param int $bodyWidth whether or not to wrap the output to the given width
+     *             defaults to false
+     * @param bool $keepHTML whether to keep non markdownable HTML or to discard it
+     *             defaults to true (HTML will be kept)
+     * @return void
+     */
+    public function __construct($linkPosition = self::LINK_AFTER_CONTENT, $bodyWidth = MDFY_BODYWIDTH, $keepHTML = MDFY_KEEPHTML)
+    {
+        $this->linkPosition = $linkPosition;
+        $this->keepHTML = $keepHTML;
+
+        if ($bodyWidth > $this->minBodyWidth) {
+            $this->bodyWidth = intval($bodyWidth);
+        } else {
+            $this->bodyWidth = false;
+        }
+
+        $this->parser = new Parser;
+        $this->parser->noTagsInCode = true;
+
+        // we don't have to do this every time
+        $search = array();
+        $replace = array();
+        foreach ($this->escapeInText as $s => $r) {
+            array_push($search, '@(?<!\\\)' . $s . '@U');
+            array_push($replace, $r);
+        }
+        $this->escapeInText = array(
+            'search' => $search,
+            'replace' => $replace
+        );
+    }
+
+    /**
+     * parse a HTML string
+     *
+     * @param string $html
+     * @return string markdown formatted
+     */
+    public function parseString($html)
+    {
+        $this->resetState();
+
+        $this->parser->html = $html;
+        $this->parse();
+
+        return $this->output;
+    }
+
+    /**
+     * set the position where the link reference will be displayed
+     *
+     * @param int $linkPosition
+     * @return void
+     */
+    public function setLinkPosition($linkPosition)
+    {
+        $this->linkPosition = $linkPosition;
+    }
+
+    /**
+     * set keep HTML tags which cannot be converted to markdown
+     *
+     * @param bool $linkPosition
+     * @return void
+     */
+    public function setKeepHTML($keepHTML)
+    {
+        $this->keepHTML = $keepHTML;
+    }
+
+    /**
+     * iterate through the nodes and decide what we
+     * shall do with the current node
+     *
+     * @param void
+     * @return void
+     */
+    protected function parse()
+    {
+        $this->output = '';
+        // drop tags
+        $this->parser->html = preg_replace('#<(' . implode('|', $this->drop) . ')[^>]*>.*</\\1>#sU', '', $this->parser->html);
+        while ($this->parser->nextNode()) {
+            switch ($this->parser->nodeType) {
+                case 'doctype':
+                    break;
+                case 'pi':
+                case 'comment':
+                    if ($this->keepHTML) {
+                        $this->flushLinebreaks();
+                        $this->out($this->parser->node);
+                        $this->setLineBreaks(2);
+                    }
+                    // else drop
+                    break;
+                case 'text':
+                    $this->handleText();
+                    break;
+                case 'tag':
+                    if (in_array($this->parser->tagName, $this->ignore)) {
+                        break;
+                    }
+                    // If the previous tag was not a block element, we simulate a paragraph tag
+                    if ($this->parser->isBlockElement && $this->parser->isNextToInlineContext && !in_array($this->parent(), $this->allowMixedChildren)) {
+                        $this->setLineBreaks(2);
+                    }
+                    if ($this->parser->isStartTag) {
+                        $this->flushLinebreaks();
+                    }
+                    if ($this->skipConversion) {
+                        $this->isMarkdownable(); // update notConverted
+                        $this->handleTagToText();
+                        continue;
+                    }
+
+                    // block elements
+                    if (!$this->parser->keepWhitespace && $this->parser->isBlockElement) {
+                        $this->fixBlockElementSpacing();
+                    }
+
+                    // inline elements
+                    if (!$this->parser->keepWhitespace && $this->parser->isInlineContext) {
+                        $this->fixInlineElementSpacing();
+                    }
+
+                    if ($this->isMarkdownable()) {
+                        if ($this->parser->isBlockElement && $this->parser->isStartTag && !$this->lastWasBlockTag && !empty($this->output)) {
+                            if (!empty($this->buffer)) {
+                                $str =& $this->buffer[count($this->buffer) - 1];
+                            } else {
+                                $str =& $this->output;
+                            }
+                            if (substr($str, -strlen($this->indent) - 1) != "\n" . $this->indent) {
+                                $str .= "\n" . $this->indent;
+                            }
+                        }
+                        $func = 'handleTag_' . $this->parser->tagName;
+                        $this->$func();
+                        if ($this->linkPosition == self::LINK_AFTER_PARAGRAPH && $this->parser->isBlockElement && !$this->parser->isStartTag && empty($this->parser->openTags)) {
+                            $this->flushFootnotes();
+                        }
+                        if (!$this->parser->isStartTag) {
+                            $this->lastClosedTag = $this->parser->tagName;
+                        }
+                    } else {
+                        $this->handleTagToText();
+                        $this->lastClosedTag = '';
+                    }
+                    break;
+                default:
+                    trigger_error('invalid node type', E_USER_ERROR);
+                    break;
+            }
+            $this->lastWasBlockTag = $this->parser->nodeType == 'tag' && $this->parser->isStartTag && $this->parser->isBlockElement;
+        }
+        if (!empty($this->buffer)) {
+            // trigger_error('buffer was not flushed, this is a bug. please report!', E_USER_WARNING);
+            while (!empty($this->buffer)) {
+                $this->out($this->unbuffer());
+            }
+        }
+        // cleanup
+        $this->output = rtrim(str_replace('&amp;', '&', str_replace('&lt;', '<', str_replace('&gt;', '>', $this->output))));
+        // end parsing, flush stacked tags
+        $this->flushFootnotes();
+        $this->stack = array();
+    }
+
+    /**
+     * check if current tag can be converted to Markdown
+     *
+     * @param void
+     * @return bool
+     */
+    protected function isMarkdownable()
+    {
+        if (!isset($this->isMarkdownable[$this->parser->tagName])) {
+            // simply not markdownable
+
+            return false;
+        }
+        if ($this->parser->isStartTag) {
+            $return = true;
+            if ($this->keepHTML) {
+                $diff = array_diff(array_keys($this->parser->tagAttributes), array_keys($this->isMarkdownable[$this->parser->tagName]));
+                if (!empty($diff)) {
+                    // non markdownable attributes given
+                    $return = false;
+                }
+            }
+            if ($return) {
+                foreach ($this->isMarkdownable[$this->parser->tagName] as $attr => $type) {
+                    if ($type == 'required' && !isset($this->parser->tagAttributes[$attr])) {
+                        // required markdown attribute not given
+                        $return = false;
+                        break;
+                    }
+                }
+            }
+            if (!$return) {
+                array_push($this->notConverted, $this->parser->tagName . '::' . implode('/', $this->parser->openTags));
+            }
+
+            return $return;
+        } else {
+            if (!empty($this->notConverted) && end($this->notConverted) === $this->parser->tagName . '::' . implode('/', $this->parser->openTags)) {
+                array_pop($this->notConverted);
+
+                return false;
+            }
+
+            return true;
+        }
+    }
+
+    /**
+     * output footnotes
+     *
+     * @param void
+     * @return void
+     */
+    protected function flushFootnotes()
+    {
+        $out = false;
+        foreach ($this->footnotes as $k => $tag) {
+            if (!isset($tag['unstacked'])) {
+                if (!$out) {
+                    $out = true;
+                    $this->out("\n\n", true);
+                } else {
+                    $this->out("\n", true);
+                }
+                $this->out(' [' . $tag['linkID'] . ']: ' . $this->getLinkReference($tag), true);
+                $tag['unstacked'] = true;
+                $this->footnotes[$k] = $tag;
+            }
+        }
+    }
+
+    /**
+     * return formated link reference
+     *
+     * @param array $tag
+     * @return string link reference
+     */
+    protected function getLinkReference($tag)
+    {
+        return $tag['href'] . (isset($tag['title']) ? ' "' . $tag['title'] . '"' : '');
+    }
+
+    /**
+     * flush enqued linebreaks
+     *
+     * @param void
+     * @return void
+     */
+    protected function flushLinebreaks()
+    {
+        if ($this->lineBreaks && !empty($this->output)) {
+            $this->out(str_repeat("\n" . $this->indent, $this->lineBreaks), true);
+        }
+        $this->lineBreaks = 0;
+    }
+
+    /**
+     * handle non Markdownable tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTagToText()
+    {
+        if (!$this->keepHTML) {
+            if (!$this->parser->isStartTag && $this->parser->isBlockElement) {
+                $this->setLineBreaks(2);
+            }
+        } else {
+            // dont convert to markdown inside this tag
+            /** TODO: markdown extra **/
+            if (!$this->parser->isEmptyTag) {
+                if ($this->parser->isStartTag) {
+                    if (!$this->skipConversion) {
+                        $this->skipConversion = $this->parser->tagName . '::' . implode('/', $this->parser->openTags);
+                    }
+                } else {
+                    if ($this->skipConversion == $this->parser->tagName . '::' . implode('/', $this->parser->openTags)) {
+                        $this->skipConversion = false;
+                    }
+                }
+            }
+
+            if ($this->parser->isBlockElement) {
+                if ($this->parser->isStartTag) {
+                    // looks like ins or del are block elements now
+                    if (in_array($this->parent(), array('ins', 'del'))) {
+                        $this->out("\n", true);
+                        $this->indent('  ');
+                    }
+                    // don't indent inside <pre> tags
+                    if ($this->parser->tagName == 'pre') {
+                        $this->out($this->parser->node);
+                        static $indent;
+                        $indent = $this->indent;
+                        $this->indent = '';
+                    } else {
+                        $this->out($this->parser->node . "\n" . $this->indent);
+                        if (!$this->parser->isEmptyTag) {
+                            $this->indent('  ');
+                        } else {
+                            $this->setLineBreaks(1);
+                        }
+                        $this->parser->html = ltrim($this->parser->html);
+                    }
+                } else {
+                    if (!$this->parser->keepWhitespace) {
+                        $this->output = rtrim($this->output);
+                    }
+                    if ($this->parser->tagName != 'pre') {
+                        $this->indent('  ');
+                        $this->out("\n" . $this->indent . $this->parser->node);
+                    } else {
+                        // reset indentation
+                        $this->out($this->parser->node);
+                        static $indent;
+                        $this->indent = $indent;
+                    }
+
+                    if (in_array($this->parent(), array('ins', 'del'))) {
+                        // ins or del was block element
+                        $this->out("\n");
+                        $this->indent('  ');
+                    }
+                    if ($this->parser->tagName == 'li') {
+                        $this->setLineBreaks(1);
+                    } else {
+                        $this->setLineBreaks(2);
+                    }
+                }
+            } else {
+                $this->out($this->parser->node);
+            }
+            if (in_array($this->parser->tagName, array('code', 'pre'))) {
+                if ($this->parser->isStartTag) {
+                    $this->buffer();
+                } else {
+                    // add stuff so cleanup just reverses this
+                    $this->out(str_replace('&lt;', '&amp;lt;', str_replace('&gt;', '&amp;gt;', $this->unbuffer())));
+                }
+            }
+        }
+    }
+
+    /**
+     * handle plain text
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleText()
+    {
+        if ($this->hasParent('pre') && strpos($this->parser->node, "\n") !== false) {
+            $this->parser->node = str_replace("\n", "\n" . $this->indent, $this->parser->node);
+        }
+        if (!$this->hasParent('code') && !$this->hasParent('pre')) {
+            // entity decode
+            $this->parser->node = $this->decode($this->parser->node);
+            if (!$this->skipConversion) {
+                // escape some chars in normal Text
+                $this->parser->node = preg_replace($this->escapeInText['search'], $this->escapeInText['replace'], $this->parser->node);
+            }
+        } else {
+            $this->parser->node = str_replace(array('&quot;', '&apos'), array('"', '\''), $this->parser->node);
+        }
+        $this->out($this->parser->node);
+        $this->lastClosedTag = '';
+    }
+
+    /**
+     * handle <em> and <i> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_em()
+    {
+        $this->out('_', true);
+    }
+
+    protected function handleTag_i()
+    {
+        $this->handleTag_em();
+    }
+
+    /**
+     * handle <strong> and <b> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_strong()
+    {
+        $this->out('**', true);
+    }
+
+    protected function handleTag_b()
+    {
+        $this->handleTag_strong();
+    }
+
+    /**
+     * handle <h1> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_h1()
+    {
+        $this->handleHeader(1);
+    }
+
+    /**
+     * handle <h2> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_h2()
+    {
+        $this->handleHeader(2);
+    }
+
+    /**
+     * handle <h3> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_h3()
+    {
+        $this->handleHeader(3);
+    }
+
+    /**
+     * handle <h4> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_h4()
+    {
+        $this->handleHeader(4);
+    }
+
+    /**
+     * handle <h5> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_h5()
+    {
+        $this->handleHeader(5);
+    }
+
+    /**
+     * handle <h6> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_h6()
+    {
+        $this->handleHeader(6);
+    }
+
+    /**
+     * handle header tags (<h1> - <h6>)
+     *
+     * @param int $level 1-6
+     * @return void
+     */
+    protected function handleHeader($level)
+    {
+        if ($this->parser->isStartTag) {
+            $this->out(str_repeat('#', $level) . ' ', true);
+        } else {
+            $this->setLineBreaks(2);
+        }
+    }
+
+    /**
+     * handle <p> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_p()
+    {
+        if (!$this->parser->isStartTag) {
+            $this->setLineBreaks(2);
+        }
+    }
+
+    /**
+     * handle <a> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_a()
+    {
+        if ($this->parser->isStartTag) {
+            $this->buffer();
+            $this->handleTag_a_parser();
+            $this->stack();
+        } else {
+            $tag = $this->unstack();
+            $buffer = $this->unbuffer();
+            $this->handleTag_a_converter($tag, $buffer);
+            $this->out($this->handleTag_a_converter($tag, $buffer), true);
+        }
+    }
+
+    /**
+     * handle <a> tags parsing
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_a_parser()
+    {
+        if (isset($this->parser->tagAttributes['title'])) {
+            $this->parser->tagAttributes['title'] = $this->decode($this->parser->tagAttributes['title']);
+        } else {
+            $this->parser->tagAttributes['title'] = null;
+        }
+        $this->parser->tagAttributes['href'] = $this->decode(trim($this->parser->tagAttributes['href']));
+    }
+
+    /**
+     * handle <a> tags conversion
+     *
+     * @param array $tag
+     * @param string $buffer
+     * @return string The markdownified link
+     */
+    protected function handleTag_a_converter($tag, $buffer)
+    {
+        if (empty($tag['href']) && empty($tag['title'])) {
+            // empty links... testcase mania, who would possibly do anything like that?!
+            return '[' . $buffer . ']()';
+        }
+
+        if ($buffer == $tag['href'] && empty($tag['title'])) {
+            // <http://example.com>
+            return '<' . $buffer . '>';
+        }
+
+        $bufferDecoded = $this->decode(trim($buffer));
+        if (substr($tag['href'], 0, 7) == 'mailto:' && 'mailto:' . $bufferDecoded == $tag['href']) {
+            if (is_null($tag['title'])) {
+                // <mail@example.com>
+                return '<' . $bufferDecoded . '>';
+            }
+            // [mail@example.com][1]
+            // ...
+            //  [1]: mailto:mail@example.com Title
+            $tag['href'] = 'mailto:' . $bufferDecoded;
+        }
+
+        if ($this->linkPosition == self::LINK_IN_PARAGRAPH) {
+            return '[' . $buffer . '](' . $this->getLinkReference($tag) . ')';
+        }
+
+        // [This link][id]
+        foreach ($this->footnotes as $tag2) {
+            if ($tag2['href'] == $tag['href'] && $tag2['title'] === $tag['title']) {
+                $tag['linkID'] = $tag2['linkID'];
+                break;
+            }
+        }
+        if (!isset($tag['linkID'])) {
+            $tag['linkID'] = count($this->footnotes) + 1;
+            array_push($this->footnotes, $tag);
+        }
+
+        return '[' . $buffer . '][' . $tag['linkID'] . ']';
+    }
+
+    /**
+     * handle <img /> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_img()
+    {
+        if (!$this->parser->isStartTag) {
+            return; // just to be sure this is really an empty tag...
+        }
+
+        if (isset($this->parser->tagAttributes['title'])) {
+            $this->parser->tagAttributes['title'] = $this->decode($this->parser->tagAttributes['title']);
+        } else {
+            $this->parser->tagAttributes['title'] = null;
+        }
+        if (isset($this->parser->tagAttributes['alt'])) {
+            $this->parser->tagAttributes['alt'] = $this->decode($this->parser->tagAttributes['alt']);
+        } else {
+            $this->parser->tagAttributes['alt'] = null;
+        }
+
+        if (empty($this->parser->tagAttributes['src'])) {
+            // support for "empty" images... dunno if this is really needed
+            // but there are some test cases which do that...
+            if (!empty($this->parser->tagAttributes['title'])) {
+                $this->parser->tagAttributes['title'] = ' ' . $this->parser->tagAttributes['title'] . ' ';
+            }
+            $this->out('![' . $this->parser->tagAttributes['alt'] . '](' . $this->parser->tagAttributes['title'] . ')', true);
+
+            return;
+        } else {
+            $this->parser->tagAttributes['src'] = $this->decode($this->parser->tagAttributes['src']);
+        }
+
+        $out = '![' . $this->parser->tagAttributes['alt'] . ']';
+        if ($this->linkPosition == self::LINK_IN_PARAGRAPH) {
+            $out .= '(' . $this->parser->tagAttributes['src'];
+            if ($this->parser->tagAttributes['title']) {
+                $out .= ' "' . $this->parser->tagAttributes['title'] . '"';
+            }
+            $out .= ')';
+            $this->out($out, true);
+            return;
+        }
+
+        // ![This image][id]
+        $link_id = false;
+        if (!empty($this->footnotes)) {
+            foreach ($this->footnotes as $tag) {
+                if ($tag['href'] == $this->parser->tagAttributes['src']
+                    && $tag['title'] === $this->parser->tagAttributes['title']
+                ) {
+                    $link_id = $tag['linkID'];
+                    break;
+                }
+            }
+        }
+        if (!$link_id) {
+            $link_id = count($this->footnotes) + 1;
+            $tag = array(
+                'href' => $this->parser->tagAttributes['src'],
+                'linkID' => $link_id,
+                'title' => $this->parser->tagAttributes['title']
+            );
+            array_push($this->footnotes, $tag);
+        }
+        $out .= '[' . $link_id . ']';
+
+        $this->out($out, true);
+    }
+
+    /**
+     * handle <code> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_code()
+    {
+        if ($this->hasParent('pre')) {
+            // ignore code blocks inside <pre>
+
+            return;
+        }
+        if ($this->parser->isStartTag) {
+            $this->buffer();
+        } else {
+            $buffer = $this->unbuffer();
+            // use as many backticks as needed
+            preg_match_all('#`+#', $buffer, $matches);
+            if (!empty($matches[0])) {
+                rsort($matches[0]);
+
+                $ticks = '`';
+                while (true) {
+                    if (!in_array($ticks, $matches[0])) {
+                        break;
+                    }
+                    $ticks .= '`';
+                }
+            } else {
+                $ticks = '`';
+            }
+            if ($buffer[0] == '`' || substr($buffer, -1) == '`') {
+                $buffer = ' ' . $buffer . ' ';
+            }
+            $this->out($ticks . $buffer . $ticks, true);
+        }
+    }
+
+    /**
+     * handle <pre> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_pre()
+    {
+        if ($this->keepHTML && $this->parser->isStartTag) {
+            // check if a simple <code> follows
+            if (!preg_match('#^\s*<code\s*>#Us', $this->parser->html)) {
+                // this is no standard markdown code block
+                $this->handleTagToText();
+
+                return;
+            }
+        }
+        $this->indent('    ');
+        if (!$this->parser->isStartTag) {
+            $this->setLineBreaks(2);
+        } else {
+            $this->parser->html = ltrim($this->parser->html);
+        }
+    }
+
+    /**
+     * handle <blockquote> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_blockquote()
+    {
+        $this->indent('> ');
+    }
+
+    /**
+     * handle <ul> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_ul()
+    {
+        if ($this->parser->isStartTag) {
+            $this->stack();
+            if (!$this->keepHTML && $this->lastClosedTag == $this->parser->tagName) {
+                $this->out("\n" . $this->indent . '<!-- -->' . "\n" . $this->indent . "\n" . $this->indent);
+            }
+        } else {
+            $this->unstack();
+            if ($this->parent() != 'li' || preg_match('#^\s*(</li\s*>\s*<li\s*>\s*)?<(p|blockquote)\s*>#sU', $this->parser->html)) {
+                // dont make Markdown add unneeded paragraphs
+                $this->setLineBreaks(2);
+            }
+        }
+    }
+
+    /**
+     * handle <ul> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_ol()
+    {
+        // same as above
+        $this->parser->tagAttributes['num'] = 0;
+        $this->handleTag_ul();
+    }
+
+    /**
+     * handle <li> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_li()
+    {
+        if ($this->parent() == 'ol') {
+            $parent =& $this->getStacked('ol');
+            if ($this->parser->isStartTag) {
+                $parent['num']++;
+                $this->out(str_repeat(' ', 3 - strlen($parent['num'])) . $parent['num'] . '. ', true);
+            }
+        } else {
+            if ($this->parser->isStartTag) {
+                $this->out('  * ', true);
+            }
+        }
+        $this->indent('    ', false);
+        if (!$this->parser->isStartTag) {
+            $this->setLineBreaks(1);
+        }
+    }
+
+    /**
+     * handle <hr /> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_hr()
+    {
+        if (!$this->parser->isStartTag) {
+            return; // just to be sure this really is an empty tag
+        }
+        $this->out('* * *', true);
+        $this->setLineBreaks(2);
+    }
+
+    /**
+     * handle <br /> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_br()
+    {
+        $this->out("  \n" . $this->indent, true);
+        $this->parser->html = ltrim($this->parser->html);
+    }
+
+    /**
+     * add current node to the stack
+     * this only stores the attributes
+     *
+     * @param void
+     * @return void
+     */
+    protected function stack()
+    {
+        if (!isset($this->stack[$this->parser->tagName])) {
+            $this->stack[$this->parser->tagName] = array();
+        }
+        array_push($this->stack[$this->parser->tagName], $this->parser->tagAttributes);
+    }
+
+    /**
+     * remove current tag from stack
+     *
+     * @param void
+     * @return array
+     */
+    protected function unstack()
+    {
+        if (!isset($this->stack[$this->parser->tagName]) || !is_array($this->stack[$this->parser->tagName])) {
+            trigger_error('Trying to unstack from empty stack. This must not happen.', E_USER_ERROR);
+        }
+
+        return array_pop($this->stack[$this->parser->tagName]);
+    }
+
+    /**
+     * get last stacked element of type $tagName
+     *
+     * @param string $tagName
+     * @return array
+     */
+    protected function &getStacked($tagName)
+    {
+        // no end() so it can be referenced
+        return $this->stack[$tagName][count($this->stack[$tagName]) - 1];
+    }
+
+    /**
+     * set number of line breaks before next start tag
+     *
+     * @param int $number
+     * @return void
+     */
+    protected function setLineBreaks($number)
+    {
+        if ($this->lineBreaks < $number) {
+            $this->lineBreaks = $number;
+        }
+    }
+
+    /**
+     * buffer next parser output until unbuffer() is called
+     *
+     * @param void
+     * @return void
+     */
+    protected function buffer()
+    {
+        array_push($this->buffer, '');
+    }
+
+    /**
+     * end current buffer and return buffered output
+     *
+     * @param void
+     * @return string
+     */
+    protected function unbuffer()
+    {
+        return array_pop($this->buffer);
+    }
+
+    /**
+     * append string to the correct var, either
+     * directly to $this->output or to the current
+     * buffers
+     *
+     * @param string $put
+     * @param boolean $nowrap
+     * @return void
+     */
+    protected function out($put, $nowrap = false)
+    {
+        if (empty($put)) {
+            return;
+        }
+        if (!empty($this->buffer)) {
+            $this->buffer[count($this->buffer) - 1] .= $put;
+        } else {
+            if ($this->bodyWidth && !$this->parser->keepWhitespace) { // wrap lines
+                // get last line
+                $pos = strrpos($this->output, "\n");
+                if ($pos === false) {
+                    $line = $this->output;
+                } else {
+                    $line = substr($this->output, $pos);
+                }
+
+                if ($nowrap) {
+                    if ($put[0] != "\n" && $this->strlen($line) + $this->strlen($put) > $this->bodyWidth) {
+                        $this->output .= "\n" . $this->indent . $put;
+                    } else {
+                        $this->output .= $put;
+                    }
+
+                    return;
+                } else {
+                    $put .= "\n"; // make sure we get all lines in the while below
+                    $lineLen = $this->strlen($line);
+                    while ($pos = strpos($put, "\n")) {
+                        $putLine = substr($put, 0, $pos + 1);
+                        $put = substr($put, $pos + 1);
+                        $putLen = $this->strlen($putLine);
+                        if ($lineLen + $putLen < $this->bodyWidth) {
+                            $this->output .= $putLine;
+                            $lineLen = $putLen;
+                        } else {
+                            $split = preg_split('#^(.{0,' . ($this->bodyWidth - $lineLen) . '})\b#', $putLine, 2, PREG_SPLIT_OFFSET_CAPTURE | PREG_SPLIT_DELIM_CAPTURE);
+                            $this->output .= rtrim($split[1][0]) . "\n" . $this->indent . $this->wordwrap(ltrim($split[2][0]), $this->bodyWidth, "\n" . $this->indent, false);
+                        }
+                    }
+                    $this->output = substr($this->output, 0, -1);
+
+                    return;
+                }
+            } else {
+                $this->output .= $put;
+            }
+        }
+    }
+
+    /**
+     * indent next output (start tag) or unindent (end tag)
+     *
+     * @param string $str indentation
+     * @param bool $output add indendation to output
+     * @return void
+     */
+    protected function indent($str, $output = true)
+    {
+        if ($this->parser->isStartTag) {
+            $this->indent .= $str;
+            if ($output) {
+                $this->out($str, true);
+            }
+        } else {
+            $this->indent = substr($this->indent, 0, -strlen($str));
+        }
+    }
+
+    /**
+     * decode email addresses
+     *
+     * @author derernst@gmx.ch <http://www.php.net/manual/en/function.html-entity-decode.php#68536>
+     * @author Milian Wolff <http://milianw.de>
+     */
+    protected function decode($text, $quote_style = ENT_QUOTES)
+    {
+        return htmlspecialchars_decode($text, $quote_style);
+    }
+
+    /**
+     * callback for decode() which converts a hexadecimal entity to UTF-8
+     *
+     * @param array $matches
+     * @return string UTF-8 encoded
+     */
+    protected function _decode_hex($matches)
+    {
+        return $this->unichr(hexdec($matches[1]));
+    }
+
+    /**
+     * callback for decode() which converts a numerical entity to UTF-8
+     *
+     * @param array $matches
+     * @return string UTF-8 encoded
+     */
+    protected function _decode_numeric($matches)
+    {
+        return $this->unichr($matches[1]);
+    }
+
+    /**
+     * UTF-8 chr() which supports numeric entities
+     *
+     * @author grey - greywyvern - com <http://www.php.net/manual/en/function.chr.php#55978>
+     * @param array $matches
+     * @return string UTF-8 encoded
+     */
+    protected function unichr($dec)
+    {
+        if ($dec < 128) {
+            $utf = chr($dec);
+        } elseif ($dec < 2048) {
+            $utf = chr(192 + (($dec - ($dec % 64)) / 64));
+            $utf .= chr(128 + ($dec % 64));
+        } else {
+            $utf = chr(224 + (($dec - ($dec % 4096)) / 4096));
+            $utf .= chr(128 + ((($dec % 4096) - ($dec % 64)) / 64));
+            $utf .= chr(128 + ($dec % 64));
+        }
+
+        return $utf;
+    }
+
+    /**
+     * UTF-8 strlen()
+     *
+     * @param string $str
+     * @return int
+     *
+     * @author dtorop 932 at hotmail dot com <http://www.php.net/manual/en/function.strlen.php#37975>
+     * @author Milian Wolff <http://milianw.de>
+     */
+    protected function strlen($str)
+    {
+        if (function_exists('mb_strlen')) {
+            return mb_strlen($str, 'UTF-8');
+        } else {
+            return preg_match_all('/[\x00-\x7F\xC0-\xFD]/', $str, $var_empty);
+        }
+    }
+
+    /**
+     * wordwrap for utf8 encoded strings
+     *
+     * @param string $str
+     * @param integer $len
+     * @param string $what
+     * @return string
+     */
+    protected function wordwrap($str, $width, $break, $cut = false)
+    {
+        if (!$cut) {
+            $regexp = '#^(?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){1,' . $width . '}\b#';
+        } else {
+            $regexp = '#^(?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){' . $width . '}#';
+        }
+        $return = '';
+        while (preg_match($regexp, $str, $matches)) {
+            $string = $matches[0];
+            $str = ltrim(substr($str, strlen($string)));
+            if (!$cut && isset($str[0]) && in_array($str[0], array('.', '!', ';', ':', '?', ','))) {
+                $string .= $str[0];
+                $str = ltrim(substr($str, 1));
+            }
+            $return .= $string . $break;
+        }
+
+        return $return . ltrim($str);
+    }
+
+    /**
+     * check if current node has a $tagName as parent (somewhere, not only the direct parent)
+     *
+     * @param string $tagName
+     * @return bool
+     */
+    protected function hasParent($tagName)
+    {
+        return in_array($tagName, $this->parser->openTags);
+    }
+
+    /**
+     * get tagName of direct parent tag
+     *
+     * @param void
+     * @return string $tagName
+     */
+    protected function parent()
+    {
+        return end($this->parser->openTags);
+    }
+
+    /**
+     * Trims whitespace in block-level elements, on the left side.
+     */
+    protected function fixBlockElementSpacing()
+    {
+        if ($this->parser->isStartTag) {
+            $this->parser->html = ltrim($this->parser->html);
+        }
+    }
+
+    /**
+     * Moves leading/trailing whitespace from inline elements outside of the
+     * element. This is to fix cases like `<strong> Text</strong>`, which if
+     * converted to `** strong**` would be incorrect Markdown.
+     *
+     * Examples:
+     *
+     *   * leading: `<strong> Text</strong>` becomes ` <strong>Text</strong>`
+     *   * trailing: `<strong>Text </strong>` becomes `<strong>Text</strong> `
+     */
+    protected function fixInlineElementSpacing()
+    {
+        if ($this->parser->isStartTag) {
+            // move spaces after the start element to before the element
+            if (preg_match('~^(\s+)~', $this->parser->html, $matches)) {
+                $this->out($matches[1]);
+                $this->parser->html = ltrim($this->parser->html, " \t\0\x0B");
+            }
+        } else {
+            if (!empty($this->buffer)) {
+                $str =& $this->buffer[count($this->buffer) - 1];
+            } else {
+                $str =& $this->output;
+            }
+
+            // move spaces before the end element to after the element
+            if (preg_match('~(\s+)$~', $str, $matches)) {
+                $str = rtrim($str, " \t\0\x0B");
+                $this->parser->html = $matches[1] . $this->parser->html;
+            }
+        }
+    }
+
+    /**
+     * Resetting the state forces the instance to behave as a fresh instance.
+     * Ideal for running within a loop where you want to maintain a single instance.
+     */
+    protected function resetState()
+    {
+        $this->notConverted = array();
+        $this->skipConversion = false;
+        $this->buffer = array();
+        $this->indent = '';
+        $this->stack = array();
+        $this->lineBreaks = 0;
+        $this->lastClosedTag = '';
+        $this->lastWasBlockTag = false;
+        $this->footnotes = array();
+    }
+}
diff --git a/vendor/pixel418/markdownify/src/ConverterExtra.php b/vendor/pixel418/markdownify/src/ConverterExtra.php
new file mode 100644
index 000000000..733955448
--- /dev/null
+++ b/vendor/pixel418/markdownify/src/ConverterExtra.php
@@ -0,0 +1,573 @@
+<?php
+
+/* This file is part of the Markdownify project, which is under LGPL license */
+
+namespace Markdownify;
+
+class ConverterExtra extends Converter
+{
+
+    /**
+     * table data, including rows with content and the maximum width of each col
+     *
+     * @var array
+     */
+    protected $table = array();
+
+    /**
+     * current col
+     *
+     * @var int
+     */
+    protected $col = -1;
+
+    /**
+     * current row
+     *
+     * @var int
+     */
+    protected $row = 0;
+
+    /**
+     * constructor, see Markdownify::Markdownify() for more information
+     */
+    public function __construct($linksAfterEachParagraph = self::LINK_AFTER_CONTENT, $bodyWidth = MDFY_BODYWIDTH, $keepHTML = MDFY_KEEPHTML)
+    {
+        parent::__construct($linksAfterEachParagraph, $bodyWidth, $keepHTML);
+
+        // new markdownable tags & attributes
+        // header ids: # foo {bar}
+        $this->isMarkdownable['h1']['id'] = 'optional';
+        $this->isMarkdownable['h1']['class'] = 'optional';
+        $this->isMarkdownable['h2']['id'] = 'optional';
+        $this->isMarkdownable['h2']['class'] = 'optional';
+        $this->isMarkdownable['h3']['id'] = 'optional';
+        $this->isMarkdownable['h3']['class'] = 'optional';
+        $this->isMarkdownable['h4']['id'] = 'optional';
+        $this->isMarkdownable['h4']['class'] = 'optional';
+        $this->isMarkdownable['h5']['id'] = 'optional';
+        $this->isMarkdownable['h5']['class'] = 'optional';
+        $this->isMarkdownable['h6']['id'] = 'optional';
+        $this->isMarkdownable['h6']['class'] = 'optional';
+        // tables
+        $this->isMarkdownable['table'] = array();
+        $this->isMarkdownable['th'] = array(
+            'align' => 'optional',
+        );
+        $this->isMarkdownable['td'] = array(
+            'align' => 'optional',
+        );
+        $this->isMarkdownable['tr'] = array();
+        array_push($this->ignore, 'thead');
+        array_push($this->ignore, 'tbody');
+        array_push($this->ignore, 'tfoot');
+        // definition lists
+        $this->isMarkdownable['dl'] = array();
+        $this->isMarkdownable['dd'] = array();
+        $this->isMarkdownable['dt'] = array();
+        // link class
+        $this->isMarkdownable['a']['id'] = 'optional';
+        $this->isMarkdownable['a']['class'] = 'optional';
+        // footnotes
+        $this->isMarkdownable['fnref'] = array(
+            'target' => 'required',
+        );
+        $this->isMarkdownable['footnotes'] = array();
+        $this->isMarkdownable['fn'] = array(
+            'name' => 'required',
+        );
+        $this->parser->blockElements['fnref'] = false;
+        $this->parser->blockElements['fn'] = true;
+        $this->parser->blockElements['footnotes'] = true;
+        // abbr
+        $this->isMarkdownable['abbr'] = array(
+            'title' => 'required',
+        );
+        // build RegEx lookahead to decide wether table can pe parsed or not
+        $inlineTags = array_keys($this->parser->blockElements, false);
+        $colContents = '(?:[^<]|<(?:' . implode('|', $inlineTags) . '|[^a-z]))*';
+        $this->tableLookaheadHeader = '{
+    ^\s*(?:<thead\s*>)?\s*                                  # open optional thead
+      <tr\s*>\s*(?:                                         # start required row with headers
+        <th(?:\s+align=("|\')(?:left|center|right)\1)?\s*>  # header with optional align
+        \s*' . $colContents . '\s*                              # contents
+        </th>\s*                                            # close header
+      )+</tr>                                               # close row with headers
+    \s*(?:</thead>)?                                        # close optional thead
+    }sxi';
+        $this->tdSubstitute = '\s*' . $colContents . '\s*           # contents
+          </td>\s*';
+        $this->tableLookaheadBody = '{
+      \s*(?:<tbody\s*>)?\s*                                 # open optional tbody
+        (?:<tr\s*>\s*                                       # start row
+          %s                                                # cols to be substituted
+        </tr>)+                                             # close row
+      \s*(?:</tbody>)?                                      # close optional tbody
+    \s*</table>                                             # close table
+    }sxi';
+    }
+
+    /**
+     * handle header tags (<h1> - <h6>)
+     *
+     * @param int $level 1-6
+     * @return void
+     */
+    protected function handleHeader($level)
+    {
+        if ($this->parser->isStartTag) {
+            $this->parser->tagAttributes['cssSelector'] = $this->getCurrentCssSelector();
+            $this->stack();
+        } else {
+            $tag = $this->unstack();
+            if (!empty($tag['cssSelector'])) {
+                // {#id.class}
+                $this->out(' {' . $tag['cssSelector'] . '}');
+            }
+        }
+        parent::handleHeader($level);
+    }
+
+    /**
+     * handle <a> tags parsing
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_a_parser()
+    {
+        parent::handleTag_a_parser();
+        $this->parser->tagAttributes['cssSelector'] = $this->getCurrentCssSelector();
+    }
+
+    /**
+     * handle <a> tags conversion
+     *
+     * @param array $tag
+     * @param string $buffer
+     * @return string The markdownified link
+     */
+    protected function handleTag_a_converter($tag, $buffer)
+    {
+        $output = parent::handleTag_a_converter($tag, $buffer);
+        if (!empty($tag['cssSelector'])) {
+            // [This link][id]{#id.class}
+            $output .= '{' . $tag['cssSelector'] . '}';
+        }
+
+        return $output;
+    }
+
+    /**
+     * handle <abbr> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_abbr()
+    {
+        if ($this->parser->isStartTag) {
+            $this->stack();
+            $this->buffer();
+        } else {
+            $tag = $this->unstack();
+            $tag['text'] = $this->unbuffer();
+            $add = true;
+            foreach ($this->stack['abbr'] as $stacked) {
+                if ($stacked['text'] == $tag['text']) {
+                    /** TODO: differing abbr definitions, i.e. different titles for same text **/
+                    $add = false;
+                    break;
+                }
+            }
+            $this->out($tag['text']);
+            if ($add) {
+                array_push($this->stack['abbr'], $tag);
+            }
+        }
+    }
+
+    /**
+     * flush stacked abbr tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function flushStacked_abbr()
+    {
+        $out = array();
+        foreach ($this->stack['abbr'] as $k => $tag) {
+            if (!isset($tag['unstacked'])) {
+                array_push($out, ' *[' . $tag['text'] . ']: ' . $tag['title']);
+                $tag['unstacked'] = true;
+                $this->stack['abbr'][$k] = $tag;
+            }
+        }
+        if (!empty($out)) {
+            $this->out("\n\n" . implode("\n", $out));
+        }
+    }
+
+    /**
+     * handle <table> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_table()
+    {
+        if ($this->parser->isStartTag) {
+            // check if upcoming table can be converted
+            if ($this->keepHTML) {
+                if (preg_match($this->tableLookaheadHeader, $this->parser->html, $matches)) {
+                    // header seems good, now check body
+                    // get align & number of cols
+                    preg_match_all('#<th(?:\s+align=("|\')(left|right|center)\1)?\s*>#si', $matches[0], $cols);
+                    $regEx = '';
+                    $i = 1;
+                    $aligns = array();
+                    foreach ($cols[2] as $align) {
+                        $align = strtolower($align);
+                        array_push($aligns, $align);
+                        if (empty($align)) {
+                            $align = 'left'; // default value
+                        }
+                        $td = '\s+align=("|\')' . $align . '\\' . $i;
+                        $i++;
+                        if ($align == 'left') {
+                            // look for empty align or left
+                            $td = '(?:' . $td . ')?';
+                        }
+                        $td = '<td' . $td . '\s*>';
+                        $regEx .= $td . $this->tdSubstitute;
+                    }
+                    $regEx = sprintf($this->tableLookaheadBody, $regEx);
+                    if (preg_match($regEx, $this->parser->html, $matches, null, strlen($matches[0]))) {
+                        // this is a markdownable table tag!
+                        $this->table = array(
+                            'rows' => array(),
+                            'col_widths' => array(),
+                            'aligns' => $aligns,
+                        );
+                        $this->row = 0;
+                    } else {
+                        // non markdownable table
+                        $this->handleTagToText();
+                    }
+                } else {
+                    // non markdownable table
+                    $this->handleTagToText();
+                }
+            } else {
+                $this->table = array(
+                    'rows' => array(),
+                    'col_widths' => array(),
+                    'aligns' => array(),
+                );
+                $this->row = 0;
+            }
+        } else {
+            // finally build the table in Markdown Extra syntax
+            $separator = array();
+            if (!isset($this->table['aligns'])) {
+                $this->table['aligns'] = array();
+            }
+            // seperator with correct align identifiers
+            foreach ($this->table['aligns'] as $col => $align) {
+                if (!$this->keepHTML && !isset($this->table['col_widths'][$col])) {
+                    break;
+                }
+                $left = ' ';
+                $right = ' ';
+                switch ($align) {
+                    case 'left':
+                        $left = ':';
+                        break;
+                    case 'center':
+                        $right = ':';
+                        $left = ':';
+                    case 'right':
+                        $right = ':';
+                        break;
+                }
+                array_push($separator, $left . str_repeat('-', $this->table['col_widths'][$col]) . $right);
+            }
+            $separator = '|' . implode('|', $separator) . '|';
+
+            $rows = array();
+            // add padding
+            array_walk_recursive($this->table['rows'], array(&$this, 'alignTdContent'));
+            $header = array_shift($this->table['rows']);
+            array_push($rows, '| ' . implode(' | ', $header) . ' |');
+            array_push($rows, $separator);
+            foreach ($this->table['rows'] as $row) {
+                array_push($rows, '| ' . implode(' | ', $row) . ' |');
+            }
+            $this->out(implode("\n" . $this->indent, $rows));
+            $this->table = array();
+            $this->setLineBreaks(2);
+        }
+    }
+
+    /**
+     * properly pad content so it is aligned as whished
+     * should be used with array_walk_recursive on $this->table['rows']
+     *
+     * @param string &$content
+     * @param int $col
+     * @return void
+     */
+    protected function alignTdContent(&$content, $col)
+    {
+        if (!isset($this->table['aligns'][$col])) {
+            $this->table['aligns'][$col] = 'left';
+        }
+        switch ($this->table['aligns'][$col]) {
+            default:
+            case 'left':
+                $content .= str_repeat(' ', $this->table['col_widths'][$col] - $this->strlen($content));
+                break;
+            case 'right':
+                $content = str_repeat(' ', $this->table['col_widths'][$col] - $this->strlen($content)) . $content;
+                break;
+            case 'center':
+                $paddingNeeded = $this->table['col_widths'][$col] - $this->strlen($content);
+                $left = floor($paddingNeeded / 2);
+                $right = $paddingNeeded - $left;
+                $content = str_repeat(' ', $left) . $content . str_repeat(' ', $right);
+                break;
+        }
+    }
+
+    /**
+     * handle <tr> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_tr()
+    {
+        if ($this->parser->isStartTag) {
+            $this->col = -1;
+        } else {
+            $this->row++;
+        }
+    }
+
+    /**
+     * handle <td> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_td()
+    {
+        if ($this->parser->isStartTag) {
+            $this->col++;
+            if (!isset($this->table['col_widths'][$this->col])) {
+                $this->table['col_widths'][$this->col] = 0;
+            }
+            $this->buffer();
+        } else {
+            $buffer = trim($this->unbuffer());
+            if (!isset($this->table['col_widths'][$this->col])) {
+                $this->table['col_widths'][$this->col] = 0;
+            }
+            $this->table['col_widths'][$this->col] = max($this->table['col_widths'][$this->col], $this->strlen($buffer));
+            $this->table['rows'][$this->row][$this->col] = $buffer;
+        }
+    }
+
+    /**
+     * handle <th> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_th()
+    {
+        if (!$this->keepHTML && !isset($this->table['rows'][1]) && !isset($this->table['aligns'][$this->col + 1])) {
+            if (isset($this->parser->tagAttributes['align'])) {
+                $this->table['aligns'][$this->col + 1] = $this->parser->tagAttributes['align'];
+            } else {
+                $this->table['aligns'][$this->col + 1] = '';
+            }
+        }
+        $this->handleTag_td();
+    }
+
+    /**
+     * handle <dl> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_dl()
+    {
+        if (!$this->parser->isStartTag) {
+            $this->setLineBreaks(2);
+        }
+    }
+
+    /**
+     * handle <dt> tags
+     *
+     * @param void
+     * @return void
+     **/
+    protected function handleTag_dt()
+    {
+        if (!$this->parser->isStartTag) {
+            $this->setLineBreaks(1);
+        }
+    }
+
+    /**
+     * handle <dd> tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_dd()
+    {
+        if ($this->parser->isStartTag) {
+            if (substr(ltrim($this->parser->html), 0, 3) == '<p>') {
+                // next comes a paragraph, so we'll need an extra line
+                $this->out("\n" . $this->indent);
+            } elseif (substr($this->output, -2) == "\n\n") {
+                $this->output = substr($this->output, 0, -1);
+            }
+            $this->out(':   ');
+            $this->indent('    ', false);
+        } else {
+            // lookahead for next dt
+            if (substr(ltrim($this->parser->html), 0, 4) == '<dt>') {
+                $this->setLineBreaks(2);
+            } else {
+                $this->setLineBreaks(1);
+            }
+            $this->indent('    ');
+        }
+    }
+
+    /**
+     * handle <fnref /> tags (custom footnote references, see markdownify_extra::parseString())
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_fnref()
+    {
+        $this->out('[^' . $this->parser->tagAttributes['target'] . ']');
+    }
+
+    /**
+     * handle <fn> tags (custom footnotes, see markdownify_extra::parseString()
+     * and markdownify_extra::_makeFootnotes())
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_fn()
+    {
+        if ($this->parser->isStartTag) {
+            $this->out('[^' . $this->parser->tagAttributes['name'] . ']:');
+            $this->setLineBreaks(1);
+        } else {
+            $this->setLineBreaks(2);
+        }
+        $this->indent('    ');
+    }
+
+    /**
+     * handle <footnotes> tag (custom footnotes, see markdownify_extra::parseString()
+     *  and markdownify_extra::_makeFootnotes())
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleTag_footnotes()
+    {
+        if (!$this->parser->isStartTag) {
+            $this->setLineBreaks(2);
+        }
+    }
+
+    /**
+     * parse a HTML string, clean up footnotes prior
+     *
+     * @param string $HTML input
+     * @return string Markdown formatted output
+     */
+    public function parseString($html)
+    {
+        /** TODO: custom markdown-extra options, e.g. titles & classes **/
+        // <sup id="fnref:..."><a href"#fn..." rel="footnote">...</a></sup>
+        // => <fnref target="..." />
+        $html = preg_replace('@<sup id="fnref:([^"]+)">\s*<a href="#fn:\1" rel="footnote">\s*\d+\s*</a>\s*</sup>@Us', '<fnref target="$1" />', $html);
+        // <div class="footnotes">
+        // <hr />
+        // <ol>
+        //
+        // <li id="fn:...">...</li>
+        // ...
+        //
+        // </ol>
+        // </div>
+        // =>
+        // <footnotes>
+        //   <fn name="...">...</fn>
+        //   ...
+        // </footnotes>
+        $html = preg_replace_callback('#<div class="footnotes">\s*<hr />\s*<ol>\s*(.+)\s*</ol>\s*</div>#Us', array(&$this, '_makeFootnotes'), $html);
+
+        return parent::parseString($html);
+    }
+
+    /**
+     * replace HTML representation of footnotes with something more easily parsable
+     *
+     * @note this is a callback to be used in parseString()
+     *
+     * @param array $matches
+     * @return string
+     */
+    protected function _makeFootnotes($matches)
+    {
+        // <li id="fn:1">
+        //   ...
+        //   <a href="#fnref:block" rev="footnote">&#8617;</a></p>
+        // </li>
+        // => <fn name="1">...</fn>
+        // remove footnote link
+        $fns = preg_replace('@\s*(&#160;\s*)?<a href="#fnref:[^"]+" rev="footnote"[^>]*>&#8617;</a>\s*@s', '', $matches[1]);
+        // remove empty paragraph
+        $fns = preg_replace('@<p>\s*</p>@s', '', $fns);
+        // <li id="fn:1">...</li> -> <footnote nr="1">...</footnote>
+        $fns = str_replace('<li id="fn:', '<fn name="', $fns);
+
+        $fns = '<footnotes>' . $fns . '</footnotes>';
+
+        return preg_replace('#</li>\s*(?=(?:<fn|</footnotes>))#s', '</fn>$1', $fns);
+    }
+
+    /**
+     * handle <a> tags parsing
+     *
+     * @param void
+     * @return void
+     */
+    protected function getCurrentCssSelector()
+    {
+        $cssSelector = '';
+        if (isset($this->parser->tagAttributes['id'])) {
+            $cssSelector .= '#' . $this->decode($this->parser->tagAttributes['id']);
+        }
+        if (isset($this->parser->tagAttributes['class'])) {
+            $classes = explode(' ', $this->decode($this->parser->tagAttributes['class']));
+            $classes = array_filter($classes);
+            $cssSelector .= '.' . join('.', $classes);
+        }
+        return $cssSelector;
+    }
+}
diff --git a/vendor/pixel418/markdownify/src/Parser.php b/vendor/pixel418/markdownify/src/Parser.php
new file mode 100644
index 000000000..90fcdf9f8
--- /dev/null
+++ b/vendor/pixel418/markdownify/src/Parser.php
@@ -0,0 +1,564 @@
+<?php
+
+/* This file is part of the Markdownify project, which is under LGPL license */
+
+namespace Markdownify;
+
+class Parser
+{
+    public static $skipWhitespace = true;
+    public static $a_ord;
+    public static $z_ord;
+    public static $special_ords;
+
+    /**
+     * tags which are always empty (<br /> etc.)
+     *
+     * @var array<string>
+     */
+    public $emptyTags = array(
+        'br',
+        'hr',
+        'input',
+        'img',
+        'area',
+        'link',
+        'meta',
+        'param',
+    );
+
+    /**
+     * tags with preformatted text
+     * whitespaces wont be touched in them
+     *
+     * @var array<string>
+     */
+    public $preformattedTags = array(
+        'script',
+        'style',
+        'pre',
+        'code',
+    );
+
+    /**
+     * supress HTML tags inside preformatted tags (see above)
+     *
+     * @var bool
+     */
+    public $noTagsInCode = false;
+
+    /**
+     * html to be parsed
+     *
+     * @var string
+     */
+    public $html = '';
+
+    /**
+     * node type:
+     *
+     * - tag (see isStartTag)
+     * - text (includes cdata)
+     * - comment
+     * - doctype
+     * - pi (processing instruction)
+     *
+     * @var string
+     */
+    public $nodeType = '';
+
+    /**
+     * current node content, i.e. either a
+     * simple string (text node), or something like
+     * <tag attrib="value"...>
+     *
+     * @var string
+     */
+    public $node = '';
+
+    /**
+     * wether current node is an opening tag (<a>) or not (</a>)
+     * set to NULL if current node is not a tag
+     * NOTE: empty tags (<br />) set this to true as well!
+     *
+     * @var bool | null
+     */
+    public $isStartTag = null;
+
+    /**
+     * wether current node is an empty tag (<br />) or not (<a></a>)
+     *
+     * @var bool | null
+     */
+    public $isEmptyTag = null;
+
+    /**
+     * tag name
+     *
+     * @var string | null
+     */
+    public $tagName = '';
+
+    /**
+     * attributes of current tag
+     *
+     * @var array (attribName=>value) | null
+     */
+    public $tagAttributes = null;
+
+    /**
+     * whether or not the actual context is a inline context
+     *
+     * @var bool | null
+     */
+    public $isInlineContext = null;
+
+    /**
+     * whether the current tag is a block element
+     *
+     * @var bool | null
+     */
+    public $isBlockElement = null;
+
+    /**
+     * whether the previous tag (browser) is a block element
+     *
+     * @var bool | null
+     */
+    public $isNextToInlineContext = null;
+
+    /**
+     * keep whitespace
+     *
+     * @var int
+     */
+    public $keepWhitespace = 0;
+
+    /**
+     * list of open tags
+     * count this to get current depth
+     *
+     * @var array
+     */
+    public $openTags = array();
+
+    /**
+     * list of block elements
+     *
+     * @var array
+     * TODO: what shall we do with <del> and <ins> ?!
+     */
+    public $blockElements = array(
+        // tag name => <bool> is block
+        // block elements
+        'address' => true,
+        'blockquote' => true,
+        'center' => true,
+        'del' => true,
+        'dir' => true,
+        'div' => true,
+        'dl' => true,
+        'fieldset' => true,
+        'form' => true,
+        'h1' => true,
+        'h2' => true,
+        'h3' => true,
+        'h4' => true,
+        'h5' => true,
+        'h6' => true,
+        'hr' => true,
+        'ins' => true,
+        'isindex' => true,
+        'menu' => true,
+        'noframes' => true,
+        'noscript' => true,
+        'ol' => true,
+        'p' => true,
+        'pre' => true,
+        'table' => true,
+        'ul' => true,
+        // set table elements and list items to block as well
+        'thead' => true,
+        'tbody' => true,
+        'tfoot' => true,
+        'td' => true,
+        'tr' => true,
+        'th' => true,
+        'li' => true,
+        'dd' => true,
+        'dt' => true,
+        // header items and html / body as well
+        'html' => true,
+        'body' => true,
+        'head' => true,
+        'meta' => true,
+        'link' => true,
+        'style' => true,
+        'title' => true,
+        // unfancy media tags, when indented should be rendered as block
+        'map' => true,
+        'object' => true,
+        'param' => true,
+        'embed' => true,
+        'area' => true,
+        // inline elements
+        'a' => false,
+        'abbr' => false,
+        'acronym' => false,
+        'applet' => false,
+        'b' => false,
+        'basefont' => false,
+        'bdo' => false,
+        'big' => false,
+        'br' => false,
+        'button' => false,
+        'cite' => false,
+        'code' => false,
+        'del' => false,
+        'dfn' => false,
+        'em' => false,
+        'font' => false,
+        'i' => false,
+        'img' => false,
+        'ins' => false,
+        'input' => false,
+        'iframe' => false,
+        'kbd' => false,
+        'label' => false,
+        'q' => false,
+        'samp' => false,
+        'script' => false,
+        'select' => false,
+        'small' => false,
+        'span' => false,
+        'strong' => false,
+        'sub' => false,
+        'sup' => false,
+        'textarea' => false,
+        'tt' => false,
+        'var' => false,
+    );
+
+    /**
+     * get next node, set $this->html prior!
+     *
+     * @param void
+     * @return bool
+     */
+    public function nextNode()
+    {
+        if (empty($this->html)) {
+            // we are done with parsing the html string
+
+            return false;
+        }
+
+        if ($this->isStartTag && !$this->isEmptyTag) {
+            array_push($this->openTags, $this->tagName);
+            if (in_array($this->tagName, $this->preformattedTags)) {
+                // dont truncate whitespaces for <code> or <pre> contents
+                $this->keepWhitespace++;
+            }
+        }
+
+        if ($this->html[0] == '<') {
+            $token = substr($this->html, 0, 9);
+            if (substr($token, 0, 2) == '<?') {
+                // xml prolog or other pi's
+                /** TODO **/
+                // trigger_error('this might need some work', E_USER_NOTICE);
+                $pos = strpos($this->html, '>');
+                $this->setNode('pi', $pos + 1);
+
+                return true;
+            }
+            if (substr($token, 0, 4) == '<!--') {
+                // comment
+                $pos = strpos($this->html, '-->');
+                if ($pos === false) {
+                    // could not find a closing -->, use next gt instead
+                    // this is firefox' behaviour
+                    $pos = strpos($this->html, '>') + 1;
+                } else {
+                    $pos += 3;
+                }
+                $this->setNode('comment', $pos);
+
+                static::$skipWhitespace = true;
+
+                return true;
+            }
+            if ($token == '<!DOCTYPE') {
+                // doctype
+                $this->setNode('doctype', strpos($this->html, '>') + 1);
+
+                static::$skipWhitespace = true;
+
+                return true;
+            }
+            if ($token == '<![CDATA[') {
+                // cdata, use text node
+
+                // remove leading <![CDATA[
+                $this->html = substr($this->html, 9);
+
+                $this->setNode('text', strpos($this->html, ']]>') + 3);
+
+                // remove trailing ]]> and trim
+                $this->node = substr($this->node, 0, -3);
+                $this->handleWhitespaces();
+
+                static::$skipWhitespace = true;
+
+                return true;
+            }
+            if ($this->parseTag()) {
+                // seems to be a tag
+                // handle whitespaces
+                if ($this->isBlockElement) {
+                    static::$skipWhitespace = true;
+                } else {
+                    static::$skipWhitespace = false;
+                }
+
+                return true;
+            }
+        }
+        if ($this->keepWhitespace) {
+            static::$skipWhitespace = false;
+        }
+        // when we get here it seems to be a text node
+        $pos = strpos($this->html, '<');
+        if ($pos === false) {
+            $pos = strlen($this->html);
+        }
+        $this->setNode('text', $pos);
+        $this->handleWhitespaces();
+        if (static::$skipWhitespace && $this->node == ' ') {
+            return $this->nextNode();
+        }
+        $this->isInlineContext = true;
+        static::$skipWhitespace = false;
+
+        return true;
+    }
+
+    /**
+     * parse tag, set tag name and attributes, see if it's a closing tag and so forth...
+     *
+     * @param void
+     * @return bool
+     */
+    protected function parseTag()
+    {
+        if (!isset(static::$a_ord)) {
+            static::$a_ord = ord('a');
+            static::$z_ord = ord('z');
+            static::$special_ords = array(
+                ord(':'), // for xml:lang
+                ord('-'), // for http-equiv
+            );
+        }
+
+        $tagName = '';
+
+        $pos = 1;
+        $isStartTag = $this->html[$pos] != '/';
+        if (!$isStartTag) {
+            $pos++;
+        }
+        // get tagName
+        while (isset($this->html[$pos])) {
+            $pos_ord = ord(strtolower($this->html[$pos]));
+            if (($pos_ord >= static::$a_ord && $pos_ord <= static::$z_ord) || (!empty($tagName) && is_numeric($this->html[$pos]))) {
+                $tagName .= $this->html[$pos];
+                $pos++;
+            } else {
+                $pos--;
+                break;
+            }
+        }
+
+        $tagName = strtolower($tagName);
+        if (empty($tagName) || !isset($this->blockElements[$tagName])) {
+            // something went wrong => invalid tag
+            $this->invalidTag();
+
+            return false;
+        }
+        if ($this->noTagsInCode && end($this->openTags) == 'code' && !($tagName == 'code' && !$isStartTag)) {
+            // we supress all HTML tags inside code tags
+            $this->invalidTag();
+
+            return false;
+        }
+
+        // get tag attributes
+        /** TODO: in html 4 attributes do not need to be quoted **/
+        $isEmptyTag = false;
+        $attributes = array();
+        $currAttrib = '';
+        while (isset($this->html[$pos + 1])) {
+            $pos++;
+            // close tag
+            if ($this->html[$pos] == '>' || $this->html[$pos] . $this->html[$pos + 1] == '/>') {
+                if ($this->html[$pos] == '/') {
+                    $isEmptyTag = true;
+                    $pos++;
+                }
+                break;
+            }
+
+            $pos_ord = ord(strtolower($this->html[$pos]));
+            if (($pos_ord >= static::$a_ord && $pos_ord <= static::$z_ord) || in_array($pos_ord, static::$special_ords)) {
+                // attribute name
+                $currAttrib .= $this->html[$pos];
+            } elseif (in_array($this->html[$pos], array(' ', "\t", "\n"))) {
+                // drop whitespace
+            } elseif (in_array($this->html[$pos] . $this->html[$pos + 1], array('="', "='"))) {
+                // get attribute value
+                $pos++;
+                $await = $this->html[$pos]; // single or double quote
+                $pos++;
+                $value = '';
+                while (isset($this->html[$pos]) && $this->html[$pos] != $await) {
+                    $value .= $this->html[$pos];
+                    $pos++;
+                }
+                $attributes[$currAttrib] = $value;
+                $currAttrib = '';
+            } else {
+                $this->invalidTag();
+
+                return false;
+            }
+        }
+        if ($this->html[$pos] != '>') {
+            $this->invalidTag();
+
+            return false;
+        }
+
+        if (!empty($currAttrib)) {
+            // html 4 allows something like <option selected> instead of <option selected="selected">
+            $attributes[$currAttrib] = $currAttrib;
+        }
+        if (!$isStartTag) {
+            if (!empty($attributes) || $tagName != end($this->openTags)) {
+                // end tags must not contain any attributes
+                // or maybe we did not expect a different tag to be closed
+                $this->invalidTag();
+
+                return false;
+            }
+            array_pop($this->openTags);
+            if (in_array($tagName, $this->preformattedTags)) {
+                $this->keepWhitespace--;
+            }
+        }
+        $pos++;
+        $this->node = substr($this->html, 0, $pos);
+        $this->html = substr($this->html, $pos);
+        $this->tagName = $tagName;
+        $this->tagAttributes = $attributes;
+        $this->isStartTag = $isStartTag;
+        $this->isEmptyTag = $isEmptyTag || in_array($tagName, $this->emptyTags);
+        if ($this->isEmptyTag) {
+            // might be not well formed
+            $this->node = preg_replace('# */? *>$#', ' />', $this->node);
+        }
+        $this->nodeType = 'tag';
+        $this->isBlockElement = $this->blockElements[$tagName];
+        $this->isNextToInlineContext = $isStartTag && $this->isInlineContext;
+        $this->isInlineContext = !$this->isBlockElement;
+        return true;
+    }
+
+    /**
+     * handle invalid tags
+     *
+     * @param void
+     * @return void
+     */
+    protected function invalidTag()
+    {
+        $this->html = substr_replace($this->html, '&lt;', 0, 1);
+    }
+
+    /**
+     * update all vars and make $this->html shorter
+     *
+     * @param string $type see description for $this->nodeType
+     * @param int $pos to which position shall we cut?
+     * @return void
+     */
+    protected function setNode($type, $pos)
+    {
+        if ($this->nodeType == 'tag') {
+            // set tag specific vars to null
+            // $type == tag should not be called here
+            // see this::parseTag() for more
+            $this->tagName = null;
+            $this->tagAttributes = null;
+            $this->isStartTag = null;
+            $this->isEmptyTag = null;
+            $this->isBlockElement = null;
+
+        }
+        $this->nodeType = $type;
+        $this->node = substr($this->html, 0, $pos);
+        $this->html = substr($this->html, $pos);
+    }
+
+    /**
+     * check if $this->html begins with $str
+     *
+     * @param string $str
+     * @return bool
+     */
+    protected function match($str)
+    {
+        return substr($this->html, 0, strlen($str)) == $str;
+    }
+
+    /**
+     * truncate whitespaces
+     *
+     * @param void
+     * @return void
+     */
+    protected function handleWhitespaces()
+    {
+        if ($this->keepWhitespace) {
+            // <pre> or <code> before...
+
+            return;
+        }
+        // truncate multiple whitespaces to a single one
+        $this->node = preg_replace('#\s+#s', ' ', $this->node);
+    }
+
+    /**
+     * normalize self::node
+     *
+     * @param void
+     * @return void
+     */
+    protected function normalizeNode()
+    {
+        $this->node = '<';
+        if (!$this->isStartTag) {
+            $this->node .= '/' . $this->tagName . '>';
+
+            return;
+        }
+        $this->node .= $this->tagName;
+        foreach ($this->tagAttributes as $name => $value) {
+            $this->node .= ' ' . $name . '="' . str_replace('"', '&quot;', $value) . '"';
+        }
+        if ($this->isEmptyTag) {
+            $this->node .= ' /';
+        }
+        $this->node .= '>';
+    }
+}
-- 
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