function advagg_detect_subfile_changes in Advanced CSS/JS Aggregation 7.2

See if any of the subfiles has changed.

Parameters

string $filename: Name of the file that is related to the subfiles.

array $subfiles: An array of files to check for changes.

string $keyname: Under what key to save the info on the files.

bool $save_changes: If TRUE then the changes will be updated in the cache.

Return value

bool TRUE if one of the subfiles has changed.

1 call to advagg_detect_subfile_changes()

advagg_advagg_scan_for_changes in ./advagg.advagg.inc

Implements hook_advagg_scan_for_changes().

File

./advagg.cache.inc, line 896

Advanced CSS/JS aggregation module.

Code

function advagg_detect_subfile_changes($filename, array $subfiles, $keyname, $save_changes = FALSE) {

  // Get the info on this file from the cache.
  module_load_include('inc', 'advagg', 'advagg');
  $info = advagg_get_info_on_file($filename);
  $hash_id = 'advagg:subfiles:' . $keyname . ':' . $info['filename_hash'];
  if (!isset($info[$keyname])) {

    // Pull up the info from the database if missing from the cache.
    $info[$keyname] = advagg_get_hash_settings($hash_id);
  }
  $subfile_changed = array();

  // Check every subfile seeing if they have changed.
  foreach ($subfiles as $subfile) {
    $current_file_info = $defaults = array(
      'hash' => '',
      'size' => 0,
      'mtime' => 0,
    );

    // Get the currently saved info on this file.
    $saved_file_info = isset($info[$keyname][$subfile]) ? $info[$keyname][$subfile] : array();
    $saved_file_info += $defaults;

    // Get the current info on the file.
    if (file_exists($subfile)) {
      $current_file_info = array(
        'hash' => drupal_hash_base64((string) @advagg_file_get_contents($subfile)),
        'size' => filesize($subfile),
        'mtime' => filemtime($subfile),
      );
    }

    // Set the info in case a save happens.
    $info[$keyname][$subfile] = $current_file_info;

    // Check for any differences.
    $diff = array_diff_assoc($saved_file_info, $current_file_info);
    if (!empty($diff)) {
      $subfile_changed[$subfile] = $diff;
    }
  }
  if (!empty($subfile_changed) && $save_changes) {
    $cache_id = 'advagg:file:' . $info['filename_hash'];

    // Set static cache.
    $filename_hashes =& drupal_static('advagg_get_info_on_file');
    $filename_hashes[$cache_id] = $info;

    // Set drupal cache.
    cache_set($cache_id, $info, 'cache_advagg_info', CACHE_PERMANENT);

    // Save to database.
    advagg_set_hash_settings($hash_id, $info[$keyname]);
  }
  return $subfile_changed;
}