friendica-addons/markdown/markdown.php

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<?php
/**
* Name: Markdown
* Description: Parse Markdown code when creating new items
* Version: 0.1
* Author: Michael Vogel <https://pirati.ca/profile/heluecht>
*/
use Friendica\App;
use Friendica\Core\Hook;
use Friendica\Core\Logger;
use Friendica\Content\Text\Markdown;
use Friendica\Core\Renderer;
use Friendica\Core\PConfig;
use Friendica\Core\L10n;
function markdown_install() {
Hook::register('post_local_start', __FILE__, 'markdown_post_local_start');
Hook::register('addon_settings', __FILE__, 'markdown_addon_settings');
Hook::register('addon_settings_post', __FILE__, 'markdown_addon_settings_post');
}
function markdown_addon_settings(App $a, &$s)
{
if (!local_user()) {
return;
}
$enabled = intval(PConfig::get(local_user(), 'markdown', 'enabled'));
$t = Renderer::getMarkupTemplate('settings.tpl', 'addon/markdown/');
$s .= Renderer::replaceMacros($t, [
'$title' => L10n::t('Markdown'),
'$enabled' => ['enabled', L10n::t('Enable Markdown parsing'), $enabled, L10n::t('If enabled, self created items will additionally be parsed via Markdown.')],
'$submit' => L10n::t('Save Settings'),
]);
}
function markdown_addon_settings_post(App $a, &$b)
{
if (!local_user() || empty($_POST['markdown-submit'])) {
return;
}
PConfig::set(local_user(), 'markdown', 'enabled', intval($_POST['enabled']));
}
function markdown_post_local_start(App $a, &$request) {
if (empty($request['body']) || !PConfig::get(local_user(), 'markdown', 'enabled')) {
return;
}
// Elements that shouldn't be parsed
$elements = ['code', 'noparse', 'nobb', 'pre', 'share', 'url', 'img'];
foreach ($elements as $element) {
$request['body'] = preg_replace_callback("/\[" . $element . "(.*?)\](.*?)\[\/" . $element . "\]/ism",
function ($match) use ($element) {
return '[' . $element . '-b64' . base64_encode($match[1]) . ']' . base64_encode($match[2]) . '[/b64-' . $element . ']';
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},
$request['body']
);
}
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$request['body'] = Markdown::toBBCode($request['body']);
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foreach (array_reverse($elements) as $element) {
$request['body'] = preg_replace_callback("/\[" . $element . "-b64(.*?)\](.*?)\[\/b64-" . $element . "\]/ism",
function ($match) use ($element) {
return '[' . $element . base64_decode($match[1]) . ']' . base64_decode($match[2]) . '[/' . $element . ']';
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},
$request['body']
);
}
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}