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<?php |
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namespace Coyote\Services\Parser\Parsers; |
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use Coyote\Repositories\Contracts\UserRepositoryInterface as User; |
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// dziedziczymy po Parsedown a nie Parsedown Extra z uwagi na buga. Parsedown Extra wycina reszte linii jezeli |
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// w danej linii znajdzie sie tag. np. <ort>ktory</ort> w ogle => <ort>ktory</ort> |
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class Markdown extends \Parsedown implements ParserInterface |
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{ |
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/** |
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* @var User |
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*/ |
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private $user; |
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/** |
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* @var bool |
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*/ |
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private $enableHashParser = false; |
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/** |
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* @var bool |
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*/ |
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private $enableUserTagParser = true; |
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/** |
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* @var string |
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*/ |
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private $hashRoute = 'microblog.tag'; |
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/** |
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* @param User $user |
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* @throws \Exception |
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*/ |
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public function __construct(User $user) |
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{ |
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$this->InlineTypes['@'][] = 'UserTag'; |
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$this->inlineMarkerList .= '@'; |
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$this->InlineTypes['#'][] = 'Hash'; |
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$this->inlineMarkerList .= '#'; |
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$this->user = $user; |
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} |
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/** |
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* @param bool $flag |
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* @return Markdown |
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*/ |
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public function setEnableHashParser(bool $flag) |
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{ |
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$this->enableHashParser = $flag; |
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return $this; |
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} |
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/** |
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* @param boolean $flag |
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* @return Markdown |
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*/ |
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public function setEnableUserTagParser(bool $flag) |
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{ |
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$this->enableUserTagParser = $flag; |
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return $this; |
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} |
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/** |
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* @param string $text |
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* @return string |
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*/ |
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public function parse($text) |
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{ |
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// @see https://github.com/erusev/parsedown/issues/432 |
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// trzeba wylaczyc zamiane linkow na URL poniewaz nie dziala to prawidlowo (bug parsera) |
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// robimy to osobno, w parserze Autolink |
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$this->setUrlsLinked(false); |
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return $this->text($text); |
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} |
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/** |
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* @param array $excerpt |
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* @return array|void |
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*/ |
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protected function inlineHash($excerpt) |
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{ |
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if (!$this->enableHashParser) { |
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return; |
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} |
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if (!$this->isSingleWord($excerpt)) { |
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return; |
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} |
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if (preg_match('~#([\p{L}\p{Mn}0-9\._+-]+)~u', $excerpt['text'], $matches)) { |
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$tag = mb_strtolower($matches[1]); |
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return [ |
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'extent' => strlen($matches[0]), |
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'element' => [ |
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'name' => 'a', |
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'text' => $matches[0], |
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'attributes' => [ |
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'href' => route($this->hashRoute, [$tag]) |
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] |
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] |
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]; |
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} |
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} |
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/** |
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* We don't want <h1> in our text |
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* We also need to disable this syntax due to parsedown error. #foo should NOT be parser |
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* because markdown needs extra space after "#". Otherwise it is hashtag. |
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* |
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* DO NOT REMOVE THIS METHOD. |
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* |
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* @param $line |
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* @return array|null |
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*/ |
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protected function blockHeader($line) |
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{ |
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$block = parent::blockHeader($line); |
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if (isset($block['element'])) { |
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if ($block['element']['name'] == 'h1') { |
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return null; |
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} |
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} |
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return $block; |
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} |
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/** |
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* Parse users login |
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* |
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* @param array $excerpt |
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* @return array|null |
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*/ |
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protected function inlineUserTag($excerpt) |
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{ |
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if (!$this->enableUserTagParser) { |
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return null; |
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} |
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$text = &$excerpt['text']; |
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$start = strpos($text, '@'); |
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if ($this->isSingleWord($excerpt)) { |
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if (!isset($text[$start + 1])) { |
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return null; |
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} |
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$exitChar = $text[$start + 1] === '{' ? '}' : ":,.\'\n "; // <-- space at the end |
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$end = $this->strpos($text, $exitChar, $start); |
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if ($end === false) { |
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$end = mb_strlen($text) - $start; |
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} |
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$length = $end - $start; |
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$start += 1; |
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$end -= 1; |
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if ($exitChar == '}') { |
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$start += 1; |
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$end -= 1; |
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$length += 1; |
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} |
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$name = substr($text, $start, $end); |
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// user name ends with ")" -- we strip if login is within bracket |
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if (strlen($name) > 0 && $name[mb_strlen($name) - 1] === ')' && mb_strpos($name, '(') === false) { |
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$name = mb_substr($name, 0, -1); |
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$length -= 1; |
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} |
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$user = $this->user->findByName($name); |
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$replacement = [ |
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'extent' => $length, |
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'element' => [ |
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'name' => 'a', |
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'text' => '@' . $name |
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] |
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]; |
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if ($user) { |
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$replacement['element']['attributes'] = [ |
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'href' => route('profile', [$user->id]), |
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'data-user-id' => $user->id, |
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'class' => 'mention' |
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]; |
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} else { |
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$replacement['element']['name'] = 'strong'; |
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} |
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return $replacement; |
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} |
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} |
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/** |
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* @param array $excerpt |
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* @return bool |
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*/ |
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private function isSingleWord(&$excerpt) |
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{ |
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// the whole text |
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$context = &$excerpt['context']; |
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// "@" or "#" position |
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$start = mb_strpos($context, $excerpt['text']); |
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// previous character (before "@" or "#") |
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$preceding = mb_substr($context, $start - 1, 1); |
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// next character (after "@" or "#") |
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$following = mb_substr($context, $start + 1, 1); |
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return mb_substr($excerpt['text'], $start + 1, 1) !== false |
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&& ($start === 0 || in_array($preceding, [' ', '(', "\n"])) |
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&& $following !== ' '; |
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} |
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/** |
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* Find the position of the first occurrence of a character in a string |
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* |
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* @param $haystack |
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* @param string $needle |
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* @param int $offset |
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* @return bool|mixed |
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*/ |
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private function strpos($haystack, $needle, $offset = 0) |
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{ |
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$result = []; |
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foreach (str_split($needle) as $char) { |
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if (($pos = strpos($haystack, $char, $offset)) !== false) { |
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$result[] = $pos; |
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} |
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} |
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return $result ? min($result) : false; |
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} |
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} |
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adam-boduch /
coyote
