function advagg_delete_file_if_stale in Advanced CSS/JS Aggregation 6

Same name and namespace in other branches

1. 7 advagg.module \advagg_delete_file_if_stale()

Callback to delete files modified more than a set time ago.

Parameters

$filename: name of a file to check how old it is.

1 string reference to 'advagg_delete_file_if_stale'

advagg_flush_caches in ./advagg.module

Implementation of hook_flush_caches().

File

./advagg.module, line 1724

Advanced CSS/JS aggregation module

Code

function advagg_delete_file_if_stale($filename) {

  // Do not process .gz files
  if (strpos($filename, '.gz') !== FALSE) {
    return;
  }
  $now = time();
  $file_last_mod = variable_get('advagg_stale_file_threshold', ADVAGG_STALE_FILE_THRESHOLD);
  $file_last_used = variable_get('advagg_stale_file_last_used_threshold', ADVAGG_STALE_FILE_LAST_USED_THRESHOLD);

  // Default mtime stale file threshold is 6 days.
  advagg_clearstatcache(TRUE, $filename);
  if ($now - filemtime($filename) <= $file_last_mod) {
    return;
  }

  // Check to see if this file is still in use.
  $data = cache_get($filename, 'cache_advagg');
  if (!empty($data->data)) {
    advagg_clearstatcache(TRUE, $filename);
    $file_last_a = @fileatime($filename);
    $file_last_agz = @fileatime($filename . '.gz');
    $file_last_a = max($file_last_a, $file_last_agz);
    if ($now - $data->data > $file_last_used && $now - $file_last_a > $file_last_used) {

      // Delete file if it hasn't been used in the last 3 days.
      file_delete($filename);
      file_delete($filename . '.gz');
    }
    else {

      // Touch file so we don't check again for another 6 days.
      touch($filename);
    }
  }
  else {

    // Delete file if it is not in the cache.
    file_delete($filename);
    file_delete($filename . '.gz');
  }
}