/**
* Purge backups.
*
* The function purges all failed and unfinished backups if there are backups more recent then them.
* Deletes local files and Google Drive files if there are more than the wanted number.
* If both the local and Drive files have been removed then the log file is deleted as well as
* all accounts of that backup.
*/
private function purge_backups()
{
$count_local = 0;
$count_drive = 0;
$found = false;
foreach (array_reverse($this->options['backup_list']) as $key => $backup) {
if (1 == $backup['status']) {
if (!empty($backup['file_path'])) {
$count_local++;
}
if (!empty($backup['drive_id'])) {
$count_drive++;
}
$found = true;
} elseif ($found) {
unset($this->options['backup_list'][$key]);
if (!empty($backup['file_path'])) {
delete_path($backup['file_path']);
}
if (is_gdocs($this->gdocs) && !empty($backup['drive_id'])) {
$this->gdocs->delete_resource($backup['drive_id']);
}
delete_path($backup['log']);
continue;
}
if ($count_local > $this->options['local_number']) {
delete_path($this->options['backup_list'][$key]['file_path']);
$this->options['backup_list'][$key]['file_path'] = '';
}
if (is_gdocs($this->gdocs) && $count_drive > $this->options['drive_number']) {
$this->gdocs->delete_resource($this->options['backup_list'][$key]['drive_id']);
$this->options['backup_list'][$key]['drive_id'] = '';
}
if (empty($this->options['backup_list'][$key]['file_path']) && empty($this->options['backup_list'][$key]['drive_id'])) {
delete_path($this->options['backup_list'][$key]['log']);
unset($this->options['backup_list'][$key]);
}
}
}
