343 lines
9.6 KiB
PHP
343 lines
9.6 KiB
PHP
<?php
|
|
|
|
/**
|
|
* Plugin Markdown.
|
|
*
|
|
* Shaare's descriptions are parsed with Markdown.
|
|
*/
|
|
|
|
/*
|
|
* If this tag is used on a shaare, the description won't be processed by Parsedown.
|
|
*/
|
|
define('NO_MD_TAG', 'nomarkdown');
|
|
|
|
/**
|
|
* Parse linklist descriptions.
|
|
*
|
|
* @param array $data linklist data.
|
|
* @param ConfigManager $conf instance.
|
|
*
|
|
* @return mixed linklist data parsed in markdown (and converted to HTML).
|
|
*/
|
|
function hook_markdown_render_linklist($data, $conf)
|
|
{
|
|
foreach ($data['links'] as &$value) {
|
|
if (!empty($value['tags']) && noMarkdownTag($value['tags'])) {
|
|
$value = stripNoMarkdownTag($value);
|
|
continue;
|
|
}
|
|
$value['description'] = process_markdown(
|
|
$value['description'],
|
|
$conf->get('security.markdown_escape', true),
|
|
$conf->get('security.allowed_protocols')
|
|
);
|
|
}
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* Parse feed linklist descriptions.
|
|
*
|
|
* @param array $data linklist data.
|
|
* @param ConfigManager $conf instance.
|
|
*
|
|
* @return mixed linklist data parsed in markdown (and converted to HTML).
|
|
*/
|
|
function hook_markdown_render_feed($data, $conf)
|
|
{
|
|
foreach ($data['links'] as &$value) {
|
|
if (!empty($value['tags']) && noMarkdownTag($value['tags'])) {
|
|
$value = stripNoMarkdownTag($value);
|
|
continue;
|
|
}
|
|
$value['description'] = process_markdown(
|
|
$value['description'],
|
|
$conf->get('security.markdown_escape', true),
|
|
$conf->get('security.allowed_protocols')
|
|
);
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* Parse daily descriptions.
|
|
*
|
|
* @param array $data daily data.
|
|
* @param ConfigManager $conf instance.
|
|
*
|
|
* @return mixed daily data parsed in markdown (and converted to HTML).
|
|
*/
|
|
function hook_markdown_render_daily($data, $conf)
|
|
{
|
|
//var_dump($data);die;
|
|
// Manipulate columns data
|
|
foreach ($data['linksToDisplay'] as &$value) {
|
|
if (!empty($value['tags']) && noMarkdownTag($value['tags'])) {
|
|
$value = stripNoMarkdownTag($value);
|
|
continue;
|
|
}
|
|
$value['formatedDescription'] = process_markdown(
|
|
$value['formatedDescription'],
|
|
$conf->get('security.markdown_escape', true),
|
|
$conf->get('security.allowed_protocols')
|
|
);
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* Check if noMarkdown is set in tags.
|
|
*
|
|
* @param string $tags tag list
|
|
*
|
|
* @return bool true if markdown should be disabled on this link.
|
|
*/
|
|
function noMarkdownTag($tags)
|
|
{
|
|
return preg_match('/(^|\s)'. NO_MD_TAG .'(\s|$)/', $tags);
|
|
}
|
|
|
|
/**
|
|
* Remove the no-markdown meta tag so it won't be displayed.
|
|
*
|
|
* @param array $link Link data.
|
|
*
|
|
* @return array Updated link without no markdown tag.
|
|
*/
|
|
function stripNoMarkdownTag($link)
|
|
{
|
|
if (! empty($link['taglist'])) {
|
|
$offset = array_search(NO_MD_TAG, $link['taglist']);
|
|
if ($offset !== false) {
|
|
unset($link['taglist'][$offset]);
|
|
}
|
|
}
|
|
|
|
if (!empty($link['tags'])) {
|
|
str_replace(NO_MD_TAG, '', $link['tags']);
|
|
}
|
|
|
|
return $link;
|
|
}
|
|
|
|
/**
|
|
* When link list is displayed, include markdown CSS.
|
|
*
|
|
* @param array $data includes data.
|
|
*
|
|
* @return mixed - includes data with markdown CSS file added.
|
|
*/
|
|
function hook_markdown_render_includes($data)
|
|
{
|
|
if ($data['_PAGE_'] == Router::$PAGE_LINKLIST
|
|
|| $data['_PAGE_'] == Router::$PAGE_DAILY
|
|
|| $data['_PAGE_'] == Router::$PAGE_EDITLINK
|
|
) {
|
|
|
|
$data['css_files'][] = PluginManager::$PLUGINS_PATH . '/markdown/markdown.css';
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* Hook render_editlink.
|
|
* Adds an help link to markdown syntax.
|
|
*
|
|
* @param array $data data passed to plugin
|
|
*
|
|
* @return array altered $data.
|
|
*/
|
|
function hook_markdown_render_editlink($data)
|
|
{
|
|
// Load help HTML into a string
|
|
$txt = file_get_contents(PluginManager::$PLUGINS_PATH .'/markdown/help.html');
|
|
$translations = [
|
|
t('Description will be rendered with'),
|
|
t('Markdown syntax documentation'),
|
|
t('Markdown syntax'),
|
|
];
|
|
$data['edit_link_plugin'][] = vsprintf($txt, $translations);
|
|
// Add no markdown 'meta-tag' in tag list if it was never used, for autocompletion.
|
|
if (! in_array(NO_MD_TAG, $data['tags'])) {
|
|
$data['tags'][NO_MD_TAG] = 0;
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
|
|
/**
|
|
* Remove HTML links auto generated by Shaarli core system.
|
|
* Keeps HREF attributes.
|
|
*
|
|
* @param string $description input description text.
|
|
*
|
|
* @return string $description without HTML links.
|
|
*/
|
|
function reverse_text2clickable($description)
|
|
{
|
|
$descriptionLines = explode(PHP_EOL, $description);
|
|
$descriptionOut = '';
|
|
$codeBlockOn = false;
|
|
$lineCount = 0;
|
|
|
|
foreach ($descriptionLines as $descriptionLine) {
|
|
// Detect line of code: starting with 4 spaces,
|
|
// except lists which can start with +/*/- or `2.` after spaces.
|
|
$codeLineOn = preg_match('/^ +(?=[^\+\*\-])(?=(?!\d\.).)/', $descriptionLine) > 0;
|
|
// Detect and toggle block of code
|
|
if (!$codeBlockOn) {
|
|
$codeBlockOn = preg_match('/^```/', $descriptionLine) > 0;
|
|
}
|
|
elseif (preg_match('/^```/', $descriptionLine) > 0) {
|
|
$codeBlockOn = false;
|
|
}
|
|
|
|
$hashtagTitle = ' title="Hashtag [^"]+"';
|
|
// Reverse `inline code` hashtags.
|
|
$descriptionLine = preg_replace(
|
|
'!(`[^`\n]*)<a href="[^ ]*"'. $hashtagTitle .'>([^<]+)</a>([^`\n]*`)!m',
|
|
'$1$2$3',
|
|
$descriptionLine
|
|
);
|
|
|
|
// Reverse all links in code blocks, only non hashtag elsewhere.
|
|
$hashtagFilter = (!$codeBlockOn && !$codeLineOn) ? '(?!'. $hashtagTitle .')': '(?:'. $hashtagTitle .')?';
|
|
$descriptionLine = preg_replace(
|
|
'#<a href="[^ ]*"'. $hashtagFilter .'>([^<]+)</a>#m',
|
|
'$1',
|
|
$descriptionLine
|
|
);
|
|
|
|
$descriptionOut .= $descriptionLine;
|
|
if ($lineCount++ < count($descriptionLines) - 1) {
|
|
$descriptionOut .= PHP_EOL;
|
|
}
|
|
}
|
|
return $descriptionOut;
|
|
}
|
|
|
|
/**
|
|
* Remove <br> tag to let markdown handle it.
|
|
*
|
|
* @param string $description input description text.
|
|
*
|
|
* @return string $description without <br> tags.
|
|
*/
|
|
function reverse_nl2br($description)
|
|
{
|
|
return preg_replace('!<br */?>!im', '', $description);
|
|
}
|
|
|
|
/**
|
|
* Remove HTML spaces ' ' auto generated by Shaarli core system.
|
|
*
|
|
* @param string $description input description text.
|
|
*
|
|
* @return string $description without HTML links.
|
|
*/
|
|
function reverse_space2nbsp($description)
|
|
{
|
|
return preg_replace('/(^| ) /m', '$1 ', $description);
|
|
}
|
|
|
|
/**
|
|
* Replace not whitelisted protocols with http:// in given description.
|
|
*
|
|
* @param string $description input description text.
|
|
* @param array $allowedProtocols list of allowed protocols.
|
|
*
|
|
* @return string $description without malicious link.
|
|
*/
|
|
function filter_protocols($description, $allowedProtocols)
|
|
{
|
|
return preg_replace_callback(
|
|
'#]\((.*?)\)#is',
|
|
function ($match) use ($allowedProtocols) {
|
|
return ']('. whitelist_protocols($match[1], $allowedProtocols) .')';
|
|
},
|
|
$description
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Remove dangerous HTML tags (tags, iframe, etc.).
|
|
* Doesn't affect <code> content (already escaped by Parsedown).
|
|
*
|
|
* @param string $description input description text.
|
|
*
|
|
* @return string given string escaped.
|
|
*/
|
|
function sanitize_html($description)
|
|
{
|
|
$escapeTags = array(
|
|
'script',
|
|
'style',
|
|
'link',
|
|
'iframe',
|
|
'frameset',
|
|
'frame',
|
|
);
|
|
foreach ($escapeTags as $tag) {
|
|
$description = preg_replace_callback(
|
|
'#<\s*'. $tag .'[^>]*>(.*</\s*'. $tag .'[^>]*>)?#is',
|
|
function ($match) { return escape($match[0]); },
|
|
$description);
|
|
}
|
|
$description = preg_replace(
|
|
'#(<[^>]+\s)on[a-z]*="?[^ "]*"?#is',
|
|
'$1',
|
|
$description);
|
|
return $description;
|
|
}
|
|
|
|
/**
|
|
* Render shaare contents through Markdown parser.
|
|
* 1. Remove HTML generated by Shaarli core.
|
|
* 2. Reverse the escape function.
|
|
* 3. Generate markdown descriptions.
|
|
* 4. Sanitize sensible HTML tags for security.
|
|
* 5. Wrap description in 'markdown' CSS class.
|
|
*
|
|
* @param string $description input description text.
|
|
* @param bool $escape escape HTML entities
|
|
*
|
|
* @return string HTML processed $description.
|
|
*/
|
|
function process_markdown($description, $escape = true, $allowedProtocols = [])
|
|
{
|
|
$parsedown = new Parsedown();
|
|
|
|
$processedDescription = $description;
|
|
$processedDescription = reverse_nl2br($processedDescription);
|
|
$processedDescription = reverse_space2nbsp($processedDescription);
|
|
$processedDescription = reverse_text2clickable($processedDescription);
|
|
$processedDescription = filter_protocols($processedDescription, $allowedProtocols);
|
|
$processedDescription = unescape($processedDescription);
|
|
$processedDescription = $parsedown
|
|
->setMarkupEscaped($escape)
|
|
->setBreaksEnabled(true)
|
|
->text($processedDescription);
|
|
$processedDescription = sanitize_html($processedDescription);
|
|
|
|
if(!empty($processedDescription)){
|
|
$processedDescription = '<div class="markdown">'. $processedDescription . '</div>';
|
|
}
|
|
|
|
return $processedDescription;
|
|
}
|
|
|
|
/**
|
|
* This function is never called, but contains translation calls for GNU gettext extraction.
|
|
*/
|
|
function markdown_dummy_translation()
|
|
{
|
|
// meta
|
|
t('Render shaare description with Markdown syntax.<br><strong>Warning</strong>:
|
|
If your shaared descriptions contained HTML tags before enabling the markdown plugin,
|
|
enabling it might break your page.
|
|
See the <a href="https://github.com/shaarli/Shaarli/tree/master/plugins/markdown#html-rendering">README</a>.');
|
|
}
|