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https://github.com/HDInnovations/UNIT3D-Community-Edition.git
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421 lines
13 KiB
PHP
421 lines
13 KiB
PHP
<?php
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/**
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* NOTICE OF LICENSE.
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*
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* UNIT3D Community Edition is open-sourced software licensed under the GNU Affero General Public License v3.0
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* The details is bundled with this project in the file LICENSE.txt.
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*
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* @project UNIT3D Community Edition
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*
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* @author HDVinnie <hdinnovations@protonmail.com>
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* @license https://www.gnu.org/licenses/agpl-3.0.en.html/ GNU Affero General Public License v3.0
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*/
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namespace App\Helpers;
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class BBCodeConverter
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{
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/**
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* @brief Constructor.
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*
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* @param string $text The text to be converted.
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*/
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public function __construct($text)
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{
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$this->text = $text;
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}
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/**
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* @brief Replaces BBCode size.
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*/
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protected function replaceSize()
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{
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$this->text = preg_replace_callback('%\[size=([\W\D\w\s]*?)\]([\W\D\w\s]*?)\[/size\]%iu',
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fn($matches) => '<span style="font-size: '.trim($matches[1], '').';">'.trim($matches[1], '').'</span>',
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$this->text
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);
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}
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/**
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* @brief Replaces BBCode center.
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*/
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protected function replaceCenter()
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{
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$this->text = preg_replace_callback('%\[center\]([\W\D\w\s]*?)\[/center\]%iu',
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fn($matches) => '<span class="text-center">'.trim($matches[1], ' ').'</span>',
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$this->text
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);
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}
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/**
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* @brief Replaces BBCode bold.
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*/
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protected function replaceBold()
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{
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$this->text = preg_replace_callback('%\[b\]([\W\D\w\s]*?)\[/b\]%iu',
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fn($matches) => '**'.trim($matches[1], ' ').'**',
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$this->text
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);
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}
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/**
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* @brief Replaces BBCode italic.
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*/
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protected function replaceItalic()
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{
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$this->text = preg_replace_callback('%\[i\]([\W\D\w\s]*?)\[/i\]%iu',
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fn($matches) => '*'.trim($matches[1], ' ').'*',
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$this->text
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);
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}
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/**
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* @brief Replaces BBCode underline. Hoedown support underline.
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*/
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protected function replaceUnderline()
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{
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$this->text = preg_replace_callback('%\[u\]([\W\D\w\s]*?)\[/u\]%iu',
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fn($matches) => '_'.trim($matches[1], ' ').'_',
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$this->text
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);
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}
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/**
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* @brief Replaces BBCode strikethrough.
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*/
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protected function replaceStrikethrough()
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{
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$this->text = preg_replace_callback('%\[s\]([\W\D\w\s]*?)\[/s\]%iu',
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fn($matches) => '~~'.trim($matches[1], ' ').'~~',
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$this->text
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);
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}
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/**
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* @brief Replaces BBCode lists.
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*/
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protected function replaceLists()
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{
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$this->text = preg_replace_callback('%\[list(?P<type>=1)?\](?P<items>[\W\D\w\s]*?)\[/list\]%iu',
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function ($matches) {
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$buffer = '';
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$list = preg_replace('/\s*$|^\s*/mu', '', $matches['items']);
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if (is_null($list)) {
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throw new \RuntimeException(sprintf("Text identified by '%d' has malformed BBCode lists", $this->id));
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}
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$items = preg_split('/\[\*\]/u', $list);
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$counter = count($items);
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if (isset($matches['type']) && $matches['type'] == '=1') { // ordered list
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// We start from 1 to discard the first string, in fact, it's empty.
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for ($i = 1; $i < $counter; $i++) {
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if (!empty($items[$i])) {
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$buffer .= (string) ($i).'. '.trim($items[$i]).PHP_EOL;
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}
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}
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} else { // unordered list
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// We start from 1 to discard the first string, in fact, it's empty.
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for ($i = 1; $i < $counter; $i++) {
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if (!empty($items[$i])) {
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$buffer .= '- '.trim($items[$i]).PHP_EOL;
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}
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}
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}
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// We need a like break above the list and another one below.
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if (!empty($buffer)) {
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$buffer = PHP_EOL.$buffer.PHP_EOL;
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}
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return $buffer;
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},
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$this->text
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);
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}
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/**
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* @brief Replaces BBCode tables.
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*/
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protected function replaceTables()
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{
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$replaceRow = function ($matches) {
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$columns = $matches['columns'];
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$columns = trim($columns);
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$cells = preg_replace_callback('%\[td?\](?P<cells>[\W\w\s]*?)\[/td\]%iu', fn($matches) => $matches['cells'].' | ', $columns);
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if ($cells !== '') {
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$cells = '| '.$cells;
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}
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return trim($cells);
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};
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$this->text = preg_replace_callback('%\[table?\](?P<rows>[\W\w\s]*?)\[/table\]%iu', function ($tableMatches) use ($replaceRow) {
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preg_match_all('%\[th?\](?P<columns>[\W\w\s]*?)\[/th\]%iu', $tableMatches['rows'], $headerMatches, PREG_SET_ORDER);
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$headers = [];
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if (count($headerMatches) !== 0) {
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$headers = array_map($replaceRow, $headerMatches);
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}
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preg_match_all('%\[tr?\](?P<columns>[\W\w\s]*?)\[/tr\]%iu', $tableMatches['rows'], $contentMatches, PREG_SET_ORDER);
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$rows = [];
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if (count($contentMatches) !== 0) {
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$rows = array_map($replaceRow, $contentMatches);
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}
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$headerSeparator = '';
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if (count($rows) > 0) {
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$columnCount = substr_count($rows[0], '|');
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if (count($headers) === 0) {
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$headers[] = implode(' ', array_fill(0, $columnCount, '|'));
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}
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$headerSeparator = implode(' --- ', array_fill(0, $columnCount, '|'));
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} else {
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return $tableMatches['rows'];
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}
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$headers[] = $headerSeparator;
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return implode("\n", array_merge($headers, $rows))."\n";
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}, $this->text);
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}
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/**
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* @brief Replaces BBCode urls.
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*/
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protected function replaceUrls()
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{
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$this->text = preg_replace_callback('%\[url\s*=\s*("(?:[^"]*")|\A[^\']*\Z|(?:[^\'">\]\s]+))\s*(?:[^]\s]*)\]([\W\D\w\s]*?)\[/url\]%iu',
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function ($matches) {
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if (isset($matches[1]) && isset($matches[2])) {
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return '['.$matches[2].']('.$matches[1].')';
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} else {
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throw new \RuntimeException(sprintf("Text identified by '%d' has malformed BBCode urls", $this->id));
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}
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},
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$this->text
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);
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}
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/**
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* @brief Replaces BBCode images.
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*/
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protected function replaceImage()
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{
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$this->text = preg_replace_callback('%\[img\]([\W\D\w\s]*?)\[/img\]%iu',
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fn($matches) => PHP_EOL.'![]'.'('.$matches[1].')'.PHP_EOL,
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$this->text
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);
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}
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/**
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* @brief Replaces BBCode images.
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*/
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protected function replaceImages()
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{
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$this->text = preg_replace_callback('%\[img\s*=\s*("(?:[^"]*")|\A[^\']*\Z|(?:[^\'">\]\s]+))\s*(?:[^]\s]*)\[/img\]%iu',
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fn($matches) => PHP_EOL.'!['.$matches[2].']'.'('.$matches[1].')'.PHP_EOL,
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$this->text
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);
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}
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/**
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* @brief Replaces BBCode quotes.
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*/
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protected function replaceQuotes()
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{
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// Removes the inner quotes, leaving just one level.
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$this->text = preg_replace('~\G(?<!^)(?>(\[quote\b[^]]*](?>[^[]++|\[(?!/?quote)|(?1))*\[/quote])|(?<!\[)(?>[^[]++|\[(?!/?quote))+\K)|\[quote\b[^]]*]\K~', '', $this->text);
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// Replaces all the remaining quotes with '> ' characters.
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$this->text = preg_replace_callback('%\[quote\b[^]]*\]((?>[^[]++|\[(?!/?quote))*)\[/quote\]%i',
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function ($matches) {
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$quote = preg_replace('/^\s*/mu', '', trim($matches[1]));
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return '> '.$quote.PHP_EOL.PHP_EOL;
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},
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$this->text
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);
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}
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/**
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* @brief Replaces BBCode snippets.
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*/
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protected function replaceSnippets()
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{
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$this->text = preg_replace_callback('%\[code\s*=?(?P<language>\w*)\](?P<snippet>[\W\D\w\s]*?)\[\/code\]%iu',
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function ($matches) {
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if (isset($matches['snippet'])) {
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$language = strtolower($matches['language']);
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if ($language == 'html4strict' or $language == 'div') {
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$language = 'html';
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} elseif ($language == 'shell' or $language == 'dos' or $language == 'batch') {
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$language = 'sh';
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} elseif ($language == 'xul' or $language == 'wpf') {
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$language = 'xml';
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} elseif ($language == 'asm') {
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$language = 'nasm';
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} elseif ($language == 'vb' or $language == 'visualbasic' or $language == 'vba') {
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$language = 'vb.net';
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} elseif ($language == 'asp') {
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$language = 'aspx-vb';
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} elseif ($language == 'xaml') {
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$language = 'xml';
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} elseif ($language == 'cplusplus') {
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$language = 'cpp';
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} elseif ($language == 'txt' or $language == 'gettext') {
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$language = 'text';
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} elseif ($language == 'basic') {
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$language = 'cbmbas';
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} elseif ($language == 'lisp') {
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$language = 'clojure';
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} elseif ($language == 'aspnet') {
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$language = 'aspx-vb';
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}
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return PHP_EOL.'```'.$language.PHP_EOL.trim($matches['snippet']).PHP_EOL.'```'.PHP_EOL;
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} else {
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throw new \RuntimeException(sprintf("Text identified by '%d' has malformed BBCode snippet.", $this->id));
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}
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},
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$this->text
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);
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}
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/**
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* @brief Replace BBCode spoiler.
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*/
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protected function replaceSpoilers()
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{
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$this->text = preg_replace_callback('%\[spoiler\]([\W\D\w\s]*?)\[/spoiler\]%iu',
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fn($matches) => '<details><summary>Spoiler!</summary><pre><code>'.trim($matches[1], ' ').'</code></pre></details>',
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$this->text
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);
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}
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/**
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* @brief Replace BBCode color.
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*/
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protected function replaceColor()
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{
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$this->text = preg_replace_callback('%\[color=([\W\D\w\s]*?)\]([\W\D\w\s]*?)\[/color\]%iu',
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fn($matches) => '<span style="color: '.trim($matches[1], '').';">'.trim($matches[1], '').'</span>',
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$this->text
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);
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}
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/**
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* @brief Replace BBCode Video.
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*/
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protected function replaceVideo()
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{
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$this->text = preg_replace_callback('%\[video=.*\]([\W\D\w\s]*?)\[/video\]%iu',
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fn($matches) => '<iframe src="https://www.youtube-nocookie.com/embed/'.trim($matches[1], '').'?rel=0" width="640" height="480" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>',
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$this->text
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);
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}
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/**
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* @brief Replace BBCode Youtube.
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*/
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protected function replaceYoutube()
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{
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$this->text = preg_replace_callback('%\[youtube\]([\W\D\w\s]*?)\[/youtube\]%iu',
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fn($matches) => '<iframe src="https://www.youtube-nocookie.com/embed/'.trim($matches[1], '').'?rel=0" width="640" height="480" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>',
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$this->text
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);
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}
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/**
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* @brief Replace BBCode Alert.
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*/
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protected function replaceAlert()
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{
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$this->text = preg_replace_callback('%\[alert\]([\W\D\w\s]*?)\[/alert\]%iu',
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fn($matches) => '<div class="decoda-alert">'.trim($matches[1], '').'</div>',
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$this->text
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);
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}
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/**
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* @brief Replace BBCode Note.
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*/
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protected function replaceNote()
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{
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$this->text = preg_replace_callback('%\[note\]([\W\D\w\s]*?)\[/note\]%iu',
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fn($matches) => '<div class="decoda-note">'.trim($matches[1], '').'</div>',
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$this->text
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);
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}
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/**
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* @brief Converts the provided BBCode text to an equivalent Markdown text.
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*/
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public function toMarkdown()
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{
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$this->replaceCenter();
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$this->replaceSize();
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$this->replaceBold();
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$this->replaceItalic();
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$this->replaceUnderline();
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$this->replaceStrikethrough();
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$this->replaceLists();
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$this->replaceTables();
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$this->replaceUrls();
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$this->replaceImage();
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$this->replaceImages();
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$this->replaceQuotes();
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$this->replaceSnippets();
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$this->replaceSpoilers();
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$this->replaceColor();
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$this->replaceVideo();
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$this->replaceYoutube();
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$this->replaceAlert();
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$this->replaceNote();
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return $this->text;
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}
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}
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