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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\Parser;
   9  use s9e\TextFormatter\Parser;
  10  use s9e\TextFormatter\Parser\Logger;
  11  use s9e\TextFormatter\Parser\Tag;
  12  class FilterProcessing
  13  {
  14  	public static function executeAttributePreprocessors(Tag $tag, array $tagConfig)
  15      {
  16          if (empty($tagConfig['attributePreprocessors']))
  17              return;
  18          foreach ($tagConfig['attributePreprocessors'] as $_c5fdeb05)
  19          {
  20              list($attrName, $regexp, $map) = $_c5fdeb05;
  21              if ($tag->hasAttribute($attrName))
  22                  self::executeAttributePreprocessor($tag, $attrName, $regexp, $map);
  23          }
  24      }
  25  	public static function filterAttributes(Tag $tag, array $tagConfig, array $registeredVars, Logger $logger)
  26      {
  27          $attributes = [];
  28          foreach ($tagConfig['attributes'] as $attrName => $attrConfig)
  29          {
  30              $attrValue = \false;
  31              if ($tag->hasAttribute($attrName))
  32              {
  33                  $vars = [
  34                      'attrName'       => $attrName,
  35                      'attrValue'      => $tag->getAttribute($attrName),
  36                      'logger'         => $logger,
  37                      'registeredVars' => $registeredVars
  38                  ];
  39                  $attrValue = self::executeAttributeFilterChain($attrConfig['filterChain'], $vars);
  40              }
  41              if ($attrValue !== \false)
  42                  $attributes[$attrName] = $attrValue;
  43              elseif (isset($attrConfig['defaultValue']))
  44                  $attributes[$attrName] = $attrConfig['defaultValue'];
  45              elseif (!empty($attrConfig['required']))
  46                  $tag->invalidate();
  47          }
  48          $tag->setAttributes($attributes);
  49      }
  50  	public static function filterTag(Tag $tag, Parser $parser, array $tagsConfig, array $openTags)
  51      {
  52          $tagName   = $tag->getName();
  53          $tagConfig = $tagsConfig[$tagName];
  54          $logger = $parser->getLogger();
  55          $logger->setTag($tag);
  56          $vars = [
  57              'logger'         => $logger,
  58              'openTags'       => $openTags,
  59              'parser'         => $parser,
  60              'registeredVars' => $parser->registeredVars,
  61              'tag'            => $tag,
  62              'tagConfig'      => $tagConfig,
  63              'text'           => $parser->getText()
  64          ];
  65          foreach ($tagConfig['filterChain'] as $filter)
  66          {
  67              if ($tag->isInvalid())
  68                  break;
  69              self::executeFilter($filter, $vars);
  70          }
  71          $logger->unsetTag();
  72      }
  73  	protected static function executeAttributeFilterChain(array $filterChain, array $vars)
  74      {
  75          $vars['logger']->setAttribute($vars['attrName']);
  76          foreach ($filterChain as $filter)
  77          {
  78              $vars['attrValue'] = self::executeFilter($filter, $vars);
  79              if ($vars['attrValue'] === \false)
  80                  break;
  81          }
  82          $vars['logger']->unsetAttribute();
  83          return $vars['attrValue'];
  84      }
  85  	protected static function executeAttributePreprocessor(Tag $tag, $attrName, $regexp, $map)
  86      {
  87          $attrValue = $tag->getAttribute($attrName);
  88          $captures  = self::getNamedCaptures($attrValue, $regexp, $map);
  89          foreach ($captures as $k => $v)
  90              if ($k === $attrName || !$tag->hasAttribute($k))
  91                  $tag->setAttribute($k, $v);
  92      }
  93  	protected static function executeFilter(array $filter, array $vars)
  94      {
  95          $vars += ['registeredVars' => []];
  96          $vars += $vars['registeredVars'];
  97          $args = [];
  98          if (isset($filter['params']))
  99              foreach ($filter['params'] as $k => $v)
 100                  $args[] = (isset($vars[$k])) ? $vars[$k] : $v;
 101          return \call_user_func_array($filter['callback'], $args);
 102      }
 103  	protected static function getNamedCaptures($str, $regexp, $map)
 104      {
 105          if (!\preg_match($regexp, $str, $m))
 106              return [];
 107          $values = [];
 108          foreach ($map as $i => $k)
 109              if (isset($m[$i]) && $m[$i] !== '')
 110                  $values[$k] = $m[$i];
 111          return $values;
 112      }
 113  }