function ad_cache_file_id in Advertisement 5.2

Same name and namespace in other branches

1. 6.3 cache/file/ad_cache_file.inc \ad_cache_file_id()
2. 6.2 cache/file/ad_cache_file.inc \ad_cache_file_id()
3. 7 cache/file/ad_cache_file.inc \ad_cache_file_id()

Return an array of aids to choose an advertisement from.

File

cache/file/ad_cache_file.inc, line 74

A plug in for the ad.module, providing a file cache mechanism for improved performance when displaying ads.

Code

function ad_cache_file_id($type, $id, $hostid) {
  $cache = ad_cache_file_cache();
  _debug_echo("File cache: ad_cache_file_id type({$type}) id({$id}) hostid({$hostid})");
  switch ($type) {
    case 'host':
      if (isset($cache['hostid'][$hostid]['aids'])) {
        return $cache['hostid'][$hostid]['aids'];
      }
      break;
    case 'nids':
      return explode(',', $id);
    case 'tids':
      if (!isset($cache['tids'][$id])) {
        $cache['tids'][$id] = array();
        $tids = explode(',', $id);
        foreach ($tids as $tid) {
          if (is_array($cache['tid'][$tid]['aid'])) {
            $cache['tids'][$id] += $cache['tid'][$tid]['aid'];
          }
        }

        // rebuild keys from 0, cache for re-use on next ad display
        $cache['tids'][$id] = array_values($cache['tids'][$id]);

        // update cache
        ad_cache_file_cache($cache);
      }
      return $cache['tids'][$id];
    case 'default':
      return $cache['tid'][0]['aid'];
    default:
      _debug_echo("File cache: unkown id type '{$type}'.");
      break;
  }
}