phorge-phorge/src/applications/search/view/PhabricatorSearchResultView.php

<?php

final class PhabricatorSearchResultView extends AphrontView {

  private $handle;
  private $query;
  private $object;

  public function setHandle(PhabricatorObjectHandle $handle) {
    $this->handle = $handle;
    return $this;
  }

  public function setQuery(PhabricatorSavedQuery $query) {
    $this->query = $query;
    return $this;
  }

  public function setObject($object) {
    $this->object = $object;
    return $this;
  }

  public function render() {
    $handle = $this->handle;
    if (!$handle->isComplete()) {
      return;
    }

    $type_name = nonempty($handle->getTypeName(), 'Document');

    require_celerity_resource('phabricator-search-results-css');

    $link = phutil_tag(
      'a',
      array(
        'href' => $handle->getURI(),
      ),
      PhabricatorEnv::getProductionURI($handle->getURI()));

    $img = $handle->getImageURI();

    if ($img) {
      $img = phutil_tag(
        'div',
        array(
          'class' => 'result-image',
          'style' => "background-image: url('{$img}');",
        ),
        '');
    }

    $title = $this->emboldenQuery($handle->getFullName());
    if ($handle->getStatus() == PhabricatorObjectHandleStatus::STATUS_CLOSED) {
      $title = phutil_tag('del', array(), $title);
    }

    return hsprintf(
      '<div class="phabricator-search-result">'.
        '%s'.
        '<div class="result-desc">'.
          '%s'.
          '<div class="result-type">%s &middot; %s</div>'.
        '</div>'.
        '<div style="clear: both;"></div>'.
      '</div>',
      $img,
      phutil_tag(
        'a',
        array(
          'class' => 'result-name',
          'href' => $handle->getURI(),
        ),
        $title),
      $type_name,
      $link);
  }


  /**
   * Find the words which are part of the query string, and bold them in a
   * result string. This makes it easier for users to see why a result
   * matched their query.
   */
  private function emboldenQuery($str) {
    $query = $this->query->getParameter('query');

    if (!strlen($query) || !strlen($str)) {
      return $str;
    }

    // This algorithm is safe but not especially fast, so don't bother if
    // we're dealing with a lot of data. This mostly prevents silly/malicious
    // queries from doing anything bad.
    if (strlen($query) + strlen($str) > 2048) {
      return $str;
    }

    // Keep track of which characters we're going to make bold. This is
    // byte oriented, but we'll make sure we don't put a bold in the middle
    // of a character later.
    $bold = array_fill(0, strlen($str), false);

    // Split the query into words.
    $parts = preg_split('/ +/', $query);

    // Find all occurrences of each word, and mark them to be emboldened.
    foreach ($parts as $part) {
      $part = trim($part);
      $part = trim($part, '"+');
      if (!strlen($part)) {
        continue;
      }

      $matches = null;
      $has_matches = preg_match_all(
        '/(?:^|\b)('.preg_quote($part, '/').')/i',
        $str,
        $matches,
        PREG_OFFSET_CAPTURE);

      if (!$has_matches) {
        continue;
      }

      // Flag the matching part of the range for boldening.
      foreach ($matches[1] as $match) {
        $offset = $match[1];
        for ($ii = 0; $ii < strlen($match[0]); $ii++) {
          $bold[$offset + $ii] = true;
        }
      }
    }

    // Split the string into ranges, applying bold styling as required.
    $out = array();
    $buf = '';
    $pos = 0;
    $is_bold = false;
    foreach (phutil_utf8v($str) as $chr) {
      if ($bold[$pos] != $is_bold) {
        if (strlen($buf)) {
          if ($is_bold) {
            $out[] = phutil_tag('strong', array(), $buf);
          } else {
            $out[] = $buf;
          }
          $buf = '';
        }
        $is_bold = !$is_bold;
      }
      $buf .= $chr;
      $pos += strlen($chr);
    }

    if (strlen($buf)) {
      if ($is_bold) {
        $out[] = phutil_tag('strong', array(), $buf);
      } else {
        $out[] = $buf;
      }
    }

    return $out;
  }

}