protected function context_condition_keywords::match in Context Keywords 6

Same name and namespace in other branches

1. 7 context_condition_keywords.inc \context_condition_keywords::match()

Match the subject against a set of regex patterns. Similar to drupal_match_keywords() but also handles negation through the use of the ~ character.

Parameters

mixed $subject: The subject string or an array of strings to be matched.

array $patterns: An array of patterns. Any patterns that begin with ~ are considered negative or excluded conditions.

boolean $keywords: Whether the given subject should be matched as a Drupal keywords. If TRUE, '<front>' will be replaced with the site frontpage when matching against $patterns. '<default>' will activate if no contexts activate when $patterns = FALSE

1 call to context_condition_keywords::match()

context_condition_keywords::execute in ./context_condition_keywords.inc

Execute.

File

./context_condition_keywords.inc, line 102

Class

context_condition_keywords

Expose keywordss as a context condition.

Code

protected function match($subject, $patterns, $keywords = FALSE) {
  static $regexps;
  $match = FALSE;
  $positives = $negatives = 0;
  $subject = !is_array($subject) ? array(
    $subject,
  ) : $subject;
  foreach ($patterns as $pattern) {
    $pattern = strtolower($pattern);
    if (strpos($pattern, '~') === 0) {
      $negate = TRUE;
      $negatives++;
    }
    else {
      $negate = FALSE;
      $positives++;
    }
    $pattern = ltrim($pattern, '~');
    if (!isset($regexps[$pattern])) {
      $regexps[$pattern] = '/^(' . preg_replace(array(
        '/(\\r\\n?|\\n)/',
        '/\\\\\\*/',
      ), array(
        '|',
        '.*',
      ), preg_quote($pattern, '/')) . ')$/';
    }
    foreach ($subject as $value) {
      $value = strtolower($value);
      if (preg_match($regexps[$pattern], $value)) {
        if ($negate) {
          return FALSE;
        }
        $match = TRUE;
      }
    }
    if ($keywords && $pattern == '<default>') {
      $match = TRUE;
    }
  }

  // If there are **only** negative conditions and we've gotten this far none
  // we actually have a match.
  if ($positives === 0 && $negatives) {
    return TRUE;
  }
  return $match;
}