context_condition_keywords.inc in Context Keywords 6

File

context_condition_keywords.inc

<?php

/**
 * Expose keywordss as a context condition.
 */
class context_condition_keywords extends context_condition {

  /**
   * Omit condition values. We will provide a custom input form for our conditions.
   */
  function condition_values() {
    return array();
  }

  /**
   * Condition form.
   */
  function condition_form($context) {
    $form = parent::condition_form($context);
    unset($form['#options']);
    $form['#type'] = 'textarea';
    $form['#default_value'] = implode("\n", $this
      ->fetch_from_context($context, 'values'));
    return $form;
  }

  /**
   * Condition form submit handler.
   */
  function condition_form_submit($values) {
    $parsed = array();
    $items = explode("\n", $values);
    if (!empty($items)) {
      foreach ($items as $v) {
        $v = trim($v);
        if (!empty($v)) {
          $parsed[$v] = $v;
        }
      }
    }
    return $parsed;
  }

  /**
   * Execute.
   */
  function execute() {
    if ($this
      ->condition_used()) {

      // Include both the keywords alias and normal keywords for matching.
      if (!isset($_SESSION['HTTP_REFERER'])) {
        $_SESSION['HTTP_REFERER'] = $_SERVER['HTTP_REFERER'];
      }
      $url = $_SESSION['HTTP_REFERER'];

      // Check to see if $_GET["keywords"], if it does, check if it's a URL or individual arguments.
      if ($_GET["keywords"] != '') {
        if (strpos($_GET["keywords"], '/')) {
          $current_keywords[] = context_keywords_provider_parse_url($_GET["keywords"]);
        }
        else {
          $current_keywords[] = str_replace('+', ' ', $_GET["keywords"]);
        }
      }
      else {
        $current_keywords[] = context_keywords_provider_parse_url($url);
      }
      $default = TRUE;
      foreach ($this
        ->get_contexts() as $context) {
        $keywords = $this
          ->fetch_from_context($context, 'values');
        if ($this
          ->match($current_keywords, $keywords, FALSE)) {
          $default = FALSE;
          $this
            ->condition_met($context);
        }
      }
      if ($default) {
        foreach ($this
          ->get_contexts() as $context) {
          $keywords = $this
            ->fetch_from_context($context, 'values');
          if ($this
            ->match($current_keywords, $keywords, TRUE)) {
            $this
              ->condition_met($context);
          }
        }
      }
    }
  }

  /**
   * Match the subject against a set of regex patterns.
   * Similar to drupal_match_keywords() but also handles negation through the use
   * of the ~ character.
   *
   * @param mixed $subject
   *   The subject string or an array of strings to be matched.
   * @param array $patterns
   *   An array of patterns. Any patterns that begin with ~ are considered
   *   negative or excluded conditions.
   * @param 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 $patterns = FALSE
   *
   */
  protected function match($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;
  }

}

Classes

Name	Description
context_condition_keywords	Expose keywordss as a context condition.