function library_search in Library 6.2

Same name and namespace in other branches

1. 5.2 library.module \library_search()
2. 6 library.module \library_search()

Implementation of hook_search()

File

./library.module, line 685

Code

function library_search($op = 'search', $keys = NULL, $skip_access_check = FALSE) {
  switch ($op) {
    case 'name':
      return t('Library');
    case 'search':

      // Build matching conditions
      list($join1, $where1) = _db_rewrite_sql();
      $arguments1 = array();
      $conditions1 = 'n.status = 1';
      if ($type = search_query_extract($keys, 'type')) {
        $types = array();
        foreach (explode(',', $type) as $t) {
          $types[] = "n.type = '%s'";
          $arguments1[] = $t;
        }
        $conditions1 .= ' AND (' . implode(' OR ', $types) . ')';
        $keys = search_query_insert($keys, 'type');
      }
      else {
        $types = array();
        foreach (library_get_item_types() as $t) {
          $types[] = "n.type = '%s'";
          $arguments1[] = $t;
        }
        $conditions1 .= ' AND (' . implode(' OR ', $types) . ')';
        $keys = search_query_insert($keys, 'type');
      }
      if ($category = search_query_extract($keys, 'category')) {
        $categories = array();
        foreach (explode(',', $category) as $c) {
          $categories[] = "tn.tid = %d";
          $arguments1[] = $c;
        }
        $conditions1 .= ' AND (' . implode(' OR ', $categories) . ')';
        $join1 .= ' INNER JOIN {term_node} tn ON n.vid = tn.vid';
        $keys = search_query_insert($keys, 'category');
      }

      // Build ranking expression (we try to map each parameter to a
      // uniform distribution in the range 0..1).
      $ranking = array();
      $arguments2 = array();
      $join2 = '';

      // Used to avoid joining on node_comment_statistics twice
      $stats_join = FALSE;
      $total = 0;
      if ($weight = (int) variable_get('node_rank_relevance', 5)) {

        // Average relevance values hover around 0.15
        $ranking[] = '%d * i.relevance';
        $arguments2[] = $weight;
        $total += $weight;
      }
      if (module_exists('statistics') && variable_get('statistics_count_content_views', 0) && ($weight = (int) variable_get('node_rank_views', 5))) {

        // Inverse law that maps the highest view count on the site to 1 and 0 to 0.
        $scale = variable_get('node_cron_views_scale', 0.0);
        $ranking[] = '%d * (2.0 - 2.0 / (1.0 + MAX(nc.totalcount) * %f))';
        $arguments2[] = $weight;
        $arguments2[] = $scale;
        $join2 .= ' LEFT JOIN {node_counter} nc ON nc.nid = i.sid';
        $total += $weight;
      }

      // When all search factors are disabled (ie they have a weight of zero),
      // the default score is based only on keyword relevance and there is no need to
      // adjust the score of each item.
      if ($total == 0) {
        $select2 = 'i.relevance AS score';
        $total = 1;
      }
      else {
        $select2 = implode(' + ', $ranking) . ' AS score';
      }

      // Do search.
      $find = do_search($keys, 'node', 'INNER JOIN {node} n ON n.nid = i.sid ' . $join1, $conditions1 . (empty($where1) ? '' : ' AND ' . $where1), $arguments1, $select2, $join2, $arguments2, 'ORDER BY n.title, score DESC');

      // Load results.
      $results = array();
      $var = array();
      $var = library_get_table_header();
      foreach ($find as $item) {

        // Build the node body.
        $node = node_load($item->sid);
        $node_rows = array();
        $node_rows = library_get_table_row($node, $var);
        foreach ($node_rows as $row) {
          $results[] = $row;
        }
      }
      return $results;
  }
}