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   1  <?php
   2  
   3  /*
   4  * @package   s9e\TextFormatter
   5  * @copyright Copyright (c) 2010-2019 The s9e Authors
   6  * @license   http://www.opensource.org/licenses/mit-license.php The MIT License
   7  */
   8  namespace s9e\TextFormatter\Plugins\BBCodes;
   9  use RuntimeException;
  10  use s9e\TextFormatter\Parser\Tag;
  11  use s9e\TextFormatter\Plugins\ParserBase;
  12  class Parser extends ParserBase
  13  {
  14      protected $attributes;
  15      protected $bbcodeConfig;
  16      protected $bbcodeName;
  17      protected $bbcodeSuffix;
  18      protected $pos;
  19      protected $startPos;
  20      protected $text;
  21      protected $textLen;
  22      protected $uppercaseText;
  23  	public function parse($text, array $matches)
  24      {
  25          $this->text          = $text;
  26          $this->textLen       = \strlen($text);
  27          $this->uppercaseText = '';
  28          foreach ($matches as $m)
  29          {
  30              $this->bbcodeName = \strtoupper($m[1][0]);
  31              if (!isset($this->config['bbcodes'][$this->bbcodeName]))
  32                  continue;
  33              $this->bbcodeConfig = $this->config['bbcodes'][$this->bbcodeName];
  34              $this->startPos     = $m[0][1];
  35              $this->pos          = $this->startPos + \strlen($m[0][0]);
  36              try
  37              {
  38                  $this->parseBBCode();
  39              }
  40              catch (RuntimeException $e)
  41              {
  42                  }
  43          }
  44      }
  45  	protected function addBBCodeEndTag()
  46      {
  47          return $this->parser->addEndTag($this->getTagName(), $this->startPos, $this->pos - $this->startPos);
  48      }
  49  	protected function addBBCodeSelfClosingTag()
  50      {
  51          $tag = $this->parser->addSelfClosingTag($this->getTagName(), $this->startPos, $this->pos - $this->startPos);
  52          $tag->setAttributes($this->attributes);
  53          return $tag;
  54      }
  55  	protected function addBBCodeStartTag()
  56      {
  57          $tag = $this->parser->addStartTag($this->getTagName(), $this->startPos, $this->pos - $this->startPos);
  58          $tag->setAttributes($this->attributes);
  59          return $tag;
  60      }
  61  	protected function captureEndTag()
  62      {
  63          if (empty($this->uppercaseText))
  64              $this->uppercaseText = \strtoupper($this->text);
  65          $match     = '[/' . $this->bbcodeName . $this->bbcodeSuffix . ']';
  66          $endTagPos = \strpos($this->uppercaseText, $match, $this->pos);
  67          if ($endTagPos === \false)
  68              return;
  69          return $this->parser->addEndTag($this->getTagName(), $endTagPos, \strlen($match));
  70      }
  71  	protected function getTagName()
  72      {
  73          return (isset($this->bbcodeConfig['tagName']))
  74               ? $this->bbcodeConfig['tagName']
  75               : $this->bbcodeName;
  76      }
  77  	protected function parseAttributes()
  78      {
  79          $firstPos = $this->pos;
  80          $this->attributes = [];
  81          while ($this->pos < $this->textLen)
  82          {
  83              $c = $this->text[$this->pos];
  84              if (\strpos(" \n\t", $c) !== \false)
  85              {
  86                  ++$this->pos;
  87                  continue;
  88              }
  89              if (\strpos('/]', $c) !== \false)
  90                  return;
  91              $spn = \strspn($this->text, 'abcdefghijklmnopqrstuvwxyz_0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-', $this->pos);
  92              if ($spn)
  93              {
  94                  $attrName = \strtolower(\substr($this->text, $this->pos, $spn));
  95                  $this->pos += $spn;
  96                  if ($this->pos >= $this->textLen)
  97                      throw new RuntimeException;
  98                  if ($this->text[$this->pos] !== '=')
  99                      continue;
 100              }
 101              elseif ($c === '=' && $this->pos === $firstPos)
 102                  $attrName = (isset($this->bbcodeConfig['defaultAttribute']))
 103                            ? $this->bbcodeConfig['defaultAttribute']
 104                            : \strtolower($this->bbcodeName);
 105              else
 106                  throw new RuntimeException;
 107              if (++$this->pos >= $this->textLen)
 108                  throw new RuntimeException;
 109              $this->attributes[$attrName] = $this->parseAttributeValue();
 110          }
 111      }
 112  	protected function parseAttributeValue()
 113      {
 114          if ($this->text[$this->pos] === '"' || $this->text[$this->pos] === "'")
 115              return $this->parseQuotedAttributeValue();
 116          if (!\preg_match('#[^\\]\\n]*?(?=\\s*(?:\\s/)?\\]|\\s+[-\\w]+=)#', $this->text, $m, \null, $this->pos))
 117              throw new RuntimeException;
 118          $attrValue  = $m[0];
 119          $this->pos += \strlen($attrValue);
 120          return $attrValue;
 121      }
 122  	protected function parseBBCode()
 123      {
 124          $this->parseBBCodeSuffix();
 125          if ($this->text[$this->startPos + 1] === '/')
 126          {
 127              if (\substr($this->text, $this->pos, 1) === ']' && $this->bbcodeSuffix === '')
 128              {
 129                  ++$this->pos;
 130                  $this->addBBCodeEndTag();
 131              }
 132              return;
 133          }
 134          $this->parseAttributes();
 135          if (\substr($this->text, $this->pos, 1) === ']')
 136              ++$this->pos;
 137          else
 138          {
 139              if (\substr($this->text, $this->pos, 2) === '/]')
 140              {
 141                  $this->pos += 2;
 142                  $this->addBBCodeSelfClosingTag();
 143              }
 144              return;
 145          }
 146          $contentAttributes = [];
 147          if (isset($this->bbcodeConfig['contentAttributes']))
 148              foreach ($this->bbcodeConfig['contentAttributes'] as $attrName)
 149                  if (!isset($this->attributes[$attrName]))
 150                      $contentAttributes[] = $attrName;
 151          $requireEndTag = ($this->bbcodeSuffix || !empty($this->bbcodeConfig['forceLookahead']));
 152          $endTag = ($requireEndTag || !empty($contentAttributes)) ? $this->captureEndTag() : \null;
 153          if (isset($endTag))
 154              foreach ($contentAttributes as $attrName)
 155                  $this->attributes[$attrName] = \substr($this->text, $this->pos, $endTag->getPos() - $this->pos);
 156          elseif ($requireEndTag)
 157              return;
 158          $tag = $this->addBBCodeStartTag();
 159          if (isset($endTag))
 160              $tag->pairWith($endTag);
 161      }
 162  	protected function parseBBCodeSuffix()
 163      {
 164          $this->bbcodeSuffix = '';
 165          if ($this->text[$this->pos] === ':')
 166          {
 167              $spn = 1 + \strspn($this->text, '0123456789', 1 + $this->pos);
 168              $this->bbcodeSuffix = \substr($this->text, $this->pos, $spn);
 169              $this->pos += $spn;
 170          }
 171      }
 172  	protected function parseQuotedAttributeValue()
 173      {
 174          $quote    = $this->text[$this->pos];
 175          $valuePos = $this->pos + 1;
 176          while (1)
 177          {
 178              $this->pos = \strpos($this->text, $quote, $this->pos + 1);
 179              if ($this->pos === \false)
 180                  throw new RuntimeException;
 181              $n = 0;
 182              do
 183              {
 184                  ++$n;
 185              }
 186              while ($this->text[$this->pos - $n] === '\\');
 187              if ($n % 2)
 188                  break;
 189          }
 190          $attrValue = \preg_replace(
 191              '#\\\\([\\\\\'"])#',
 192              '$1',
 193              \substr($this->text, $valuePos, $this->pos - $valuePos)
 194          );
 195          ++$this->pos;
 196          return $attrValue;
 197      }
 198  }